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![Christophe JAILLET](/assets/img/avatar_default.png)
The kstrto<something>() functions have been moved from kernel.h to kstrtox.h. So, include the latter directly in the appropriate files. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/51688cf50bda44e2731381a31287c62319388783.1667763218.git.christophe.jaillet@wanadoo.fr Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2986 lines
85 KiB
C
2986 lines
85 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* lm90.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de>
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*
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* Based on the lm83 driver. The LM90 is a sensor chip made by National
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* Semiconductor. It reports up to two temperatures (its own plus up to
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* one external one) with a 0.125 deg resolution (1 deg for local
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* temperature) and a 3-4 deg accuracy.
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*
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* This driver also supports the LM89 and LM99, two other sensor chips
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* made by National Semiconductor. Both have an increased remote
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* temperature measurement accuracy (1 degree), and the LM99
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* additionally shifts remote temperatures (measured and limits) by 16
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* degrees, which allows for higher temperatures measurement.
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* Note that there is no way to differentiate between both chips.
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* When device is auto-detected, the driver will assume an LM99.
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*
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* This driver also supports the LM86, another sensor chip made by
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* National Semiconductor. It is exactly similar to the LM90 except it
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* has a higher accuracy.
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*
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* This driver also supports the ADM1032, a sensor chip made by Analog
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* Devices. That chip is similar to the LM90, with a few differences
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* that are not handled by this driver. Among others, it has a higher
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* accuracy than the LM90, much like the LM86 does.
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*
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* This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
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* chips made by Maxim. These chips are similar to the LM86.
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* Note that there is no easy way to differentiate between the three
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* variants. We use the device address to detect MAX6659, which will result
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* in a detection as max6657 if it is on address 0x4c. The extra address
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* and features of the MAX6659 are only supported if the chip is configured
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* explicitly as max6659, or if its address is not 0x4c.
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* These chips lack the remote temperature offset feature.
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*
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* This driver also supports the MAX6654 chip made by Maxim. This chip can be
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* at 9 different addresses, similar to MAX6680/MAX6681. The MAX6654 is similar
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* to MAX6657/MAX6658/MAX6659, but does not support critical temperature
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* limits. Extended range is available by setting the configuration register
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* accordingly, and is done during initialization. Extended precision is only
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* available at conversion rates of 1 Hz and slower. Note that extended
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* precision is not enabled by default, as this driver initializes all chips
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* to 2 Hz by design. The driver also supports MAX6690, which is practically
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* identical to MAX6654.
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*
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* This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and
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* MAX6692 chips made by Maxim. These are again similar to the LM86,
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* but they use unsigned temperature values and can report temperatures
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* from 0 to 145 degrees.
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*
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* This driver also supports the MAX6680 and MAX6681, two other sensor
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* chips made by Maxim. These are quite similar to the other Maxim
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* chips. The MAX6680 and MAX6681 only differ in the pinout so they can
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* be treated identically.
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*
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* This driver also supports the MAX6695 and MAX6696, two other sensor
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* chips made by Maxim. These are also quite similar to other Maxim
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* chips, but support three temperature sensors instead of two. MAX6695
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* and MAX6696 only differ in the pinout so they can be treated identically.
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*
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* This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
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* NCT1008 from ON Semiconductor. The chips are supported in both compatibility
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* and extended mode. They are mostly compatible with LM90 except for a data
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* format difference for the temperature value registers.
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*
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* This driver also supports ADT7481, ADT7482, and ADT7483 from Analog Devices
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* / ON Semiconductor. The chips are similar to ADT7461 but support two external
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* temperature sensors.
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*
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* This driver also supports NCT72, NCT214, and NCT218 from ON Semiconductor.
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* The chips are similar to ADT7461/ADT7461A but have full PEC support
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* (undocumented).
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*
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* This driver also supports the SA56004 from Philips. This device is
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* pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
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*
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* This driver also supports the G781 from GMT. This device is compatible
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* with the ADM1032.
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*
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* This driver also supports TMP451 and TMP461 from Texas Instruments.
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* Those devices are supported in both compatibility and extended mode.
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* They are mostly compatible with ADT7461 except for local temperature
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* low byte register and max conversion rate.
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*
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* This driver also supports MAX1617 and various clones such as G767
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* and NE1617. Such clones will be detected as MAX1617.
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*
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* This driver also supports NE1618 from Philips. It is similar to NE1617
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* but supports 11 bit external temperature values.
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*
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* Since the LM90 was the first chipset supported by this driver, most
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* comments will refer to this chipset, but are actually general and
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* concern all supported chipsets, unless mentioned otherwise.
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*/
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#include <linux/bits.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/jiffies.h>
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#include <linux/hwmon.h>
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#include <linux/kstrtox.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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/* The maximum number of channels currently supported */
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#define MAX_CHANNELS 3
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/*
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* Addresses to scan
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* Address is fully defined internally and cannot be changed except for
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* MAX6659, MAX6680 and MAX6681.
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* LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
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* MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
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* ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
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* have address 0x4d.
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* MAX6647 has address 0x4e.
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* MAX6659 can have address 0x4c, 0x4d or 0x4e.
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* MAX6654, MAX6680, and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29,
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* 0x2a, 0x2b, 0x4c, 0x4d or 0x4e.
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* SA56004 can have address 0x48 through 0x4F.
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*/
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static const unsigned short normal_i2c[] = {
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0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
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0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
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enum chips { adm1023, adm1032, adt7461, adt7461a, adt7481,
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g781, lm84, lm90, lm99,
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max1617, max6642, max6646, max6648, max6654, max6657, max6659, max6680, max6696,
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nct210, nct72, ne1618, sa56004, tmp451, tmp461, w83l771,
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};
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/*
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* The LM90 registers
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*/
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#define LM90_REG_MAN_ID 0xFE
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#define LM90_REG_CHIP_ID 0xFF
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#define LM90_REG_CONFIG1 0x03
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#define LM90_REG_CONFIG2 0xBF
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#define LM90_REG_CONVRATE 0x04
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#define LM90_REG_STATUS 0x02
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#define LM90_REG_LOCAL_TEMP 0x00
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#define LM90_REG_LOCAL_HIGH 0x05
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#define LM90_REG_LOCAL_LOW 0x06
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#define LM90_REG_LOCAL_CRIT 0x20
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#define LM90_REG_REMOTE_TEMPH 0x01
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#define LM90_REG_REMOTE_TEMPL 0x10
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#define LM90_REG_REMOTE_OFFSH 0x11
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#define LM90_REG_REMOTE_OFFSL 0x12
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#define LM90_REG_REMOTE_HIGHH 0x07
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#define LM90_REG_REMOTE_HIGHL 0x13
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#define LM90_REG_REMOTE_LOWH 0x08
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#define LM90_REG_REMOTE_LOWL 0x14
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#define LM90_REG_REMOTE_CRIT 0x19
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#define LM90_REG_TCRIT_HYST 0x21
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/* MAX6646/6647/6649/6654/6657/6658/6659/6695/6696 registers */
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#define MAX6657_REG_LOCAL_TEMPL 0x11
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#define MAX6696_REG_STATUS2 0x12
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#define MAX6659_REG_REMOTE_EMERG 0x16
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#define MAX6659_REG_LOCAL_EMERG 0x17
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/* SA56004 registers */
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#define SA56004_REG_LOCAL_TEMPL 0x22
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#define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
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/* TMP451/TMP461 registers */
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#define TMP451_REG_LOCAL_TEMPL 0x15
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#define TMP451_REG_CONALERT 0x22
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#define TMP461_REG_CHEN 0x16
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#define TMP461_REG_DFC 0x24
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/* ADT7481 registers */
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#define ADT7481_REG_STATUS2 0x23
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#define ADT7481_REG_CONFIG2 0x24
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#define ADT7481_REG_MAN_ID 0x3e
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#define ADT7481_REG_CHIP_ID 0x3d
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/* Device features */
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#define LM90_HAVE_EXTENDED_TEMP BIT(0) /* extended temperature support */
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#define LM90_HAVE_OFFSET BIT(1) /* temperature offset register */
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#define LM90_HAVE_UNSIGNED_TEMP BIT(2) /* temperatures are unsigned */
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#define LM90_HAVE_REM_LIMIT_EXT BIT(3) /* extended remote limit */
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#define LM90_HAVE_EMERGENCY BIT(4) /* 3rd upper (emergency) limit */
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#define LM90_HAVE_EMERGENCY_ALARM BIT(5)/* emergency alarm */
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#define LM90_HAVE_TEMP3 BIT(6) /* 3rd temperature sensor */
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#define LM90_HAVE_BROKEN_ALERT BIT(7) /* Broken alert */
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#define LM90_PAUSE_FOR_CONFIG BIT(8) /* Pause conversion for config */
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#define LM90_HAVE_CRIT BIT(9) /* Chip supports CRIT/OVERT register */
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#define LM90_HAVE_CRIT_ALRM_SWP BIT(10) /* critical alarm bits swapped */
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#define LM90_HAVE_PEC BIT(11) /* Chip supports PEC */
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#define LM90_HAVE_PARTIAL_PEC BIT(12) /* Partial PEC support (adm1032)*/
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#define LM90_HAVE_ALARMS BIT(13) /* Create 'alarms' attribute */
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#define LM90_HAVE_EXT_UNSIGNED BIT(14) /* extended unsigned temperature*/
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#define LM90_HAVE_LOW BIT(15) /* low limits */
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#define LM90_HAVE_CONVRATE BIT(16) /* conversion rate */
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#define LM90_HAVE_REMOTE_EXT BIT(17) /* extended remote temperature */
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#define LM90_HAVE_FAULTQUEUE BIT(18) /* configurable samples count */
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/* LM90 status */
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#define LM90_STATUS_LTHRM BIT(0) /* local THERM limit tripped */
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#define LM90_STATUS_RTHRM BIT(1) /* remote THERM limit tripped */
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#define LM90_STATUS_ROPEN BIT(2) /* remote is an open circuit */
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#define LM90_STATUS_RLOW BIT(3) /* remote low temp limit tripped */
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#define LM90_STATUS_RHIGH BIT(4) /* remote high temp limit tripped */
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#define LM90_STATUS_LLOW BIT(5) /* local low temp limit tripped */
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#define LM90_STATUS_LHIGH BIT(6) /* local high temp limit tripped */
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#define LM90_STATUS_BUSY BIT(7) /* conversion is ongoing */
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/* MAX6695/6696 and ADT7481 2nd status register */
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#define MAX6696_STATUS2_R2THRM BIT(1) /* remote2 THERM limit tripped */
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#define MAX6696_STATUS2_R2OPEN BIT(2) /* remote2 is an open circuit */
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#define MAX6696_STATUS2_R2LOW BIT(3) /* remote2 low temp limit tripped */
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#define MAX6696_STATUS2_R2HIGH BIT(4) /* remote2 high temp limit tripped */
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#define MAX6696_STATUS2_ROT2 BIT(5) /* remote emergency limit tripped */
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#define MAX6696_STATUS2_R2OT2 BIT(6) /* remote2 emergency limit tripped */
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#define MAX6696_STATUS2_LOT2 BIT(7) /* local emergency limit tripped */
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id lm90_id[] = {
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{ "adm1020", max1617 },
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{ "adm1021", max1617 },
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{ "adm1023", adm1023 },
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{ "adm1032", adm1032 },
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{ "adt7421", adt7461a },
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{ "adt7461", adt7461 },
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{ "adt7461a", adt7461a },
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{ "adt7481", adt7481 },
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{ "adt7482", adt7481 },
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{ "adt7483a", adt7481 },
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{ "g781", g781 },
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{ "gl523sm", max1617 },
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{ "lm84", lm84 },
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{ "lm86", lm90 },
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{ "lm89", lm90 },
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{ "lm90", lm90 },
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{ "lm99", lm99 },
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{ "max1617", max1617 },
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{ "max6642", max6642 },
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{ "max6646", max6646 },
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{ "max6647", max6646 },
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{ "max6648", max6648 },
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{ "max6649", max6646 },
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{ "max6654", max6654 },
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{ "max6657", max6657 },
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{ "max6658", max6657 },
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{ "max6659", max6659 },
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{ "max6680", max6680 },
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{ "max6681", max6680 },
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{ "max6690", max6654 },
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{ "max6692", max6648 },
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{ "max6695", max6696 },
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{ "max6696", max6696 },
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{ "mc1066", max1617 },
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{ "nct1008", adt7461a },
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{ "nct210", nct210 },
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{ "nct214", nct72 },
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{ "nct218", nct72 },
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{ "nct72", nct72 },
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{ "ne1618", ne1618 },
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{ "w83l771", w83l771 },
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{ "sa56004", sa56004 },
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{ "thmc10", max1617 },
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{ "tmp451", tmp451 },
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{ "tmp461", tmp461 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm90_id);
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static const struct of_device_id __maybe_unused lm90_of_match[] = {
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{
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.compatible = "adi,adm1032",
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.data = (void *)adm1032
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},
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{
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.compatible = "adi,adt7461",
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.data = (void *)adt7461
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},
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{
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.compatible = "adi,adt7461a",
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.data = (void *)adt7461a
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},
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{
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.compatible = "adi,adt7481",
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.data = (void *)adt7481
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},
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{
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.compatible = "gmt,g781",
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.data = (void *)g781
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},
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{
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.compatible = "national,lm90",
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.data = (void *)lm90
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},
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{
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.compatible = "national,lm86",
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.data = (void *)lm90
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},
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{
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.compatible = "national,lm89",
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.data = (void *)lm90
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},
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{
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.compatible = "national,lm99",
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.data = (void *)lm99
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},
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{
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.compatible = "dallas,max6646",
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.data = (void *)max6646
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},
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{
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.compatible = "dallas,max6647",
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.data = (void *)max6646
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},
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{
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.compatible = "dallas,max6649",
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.data = (void *)max6646
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},
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{
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.compatible = "dallas,max6654",
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.data = (void *)max6654
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},
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{
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.compatible = "dallas,max6657",
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.data = (void *)max6657
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},
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{
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.compatible = "dallas,max6658",
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.data = (void *)max6657
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},
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{
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.compatible = "dallas,max6659",
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.data = (void *)max6659
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},
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{
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.compatible = "dallas,max6680",
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.data = (void *)max6680
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},
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{
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.compatible = "dallas,max6681",
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.data = (void *)max6680
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},
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{
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.compatible = "dallas,max6695",
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.data = (void *)max6696
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},
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{
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.compatible = "dallas,max6696",
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.data = (void *)max6696
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},
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{
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.compatible = "onnn,nct1008",
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.data = (void *)adt7461a
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},
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{
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.compatible = "onnn,nct214",
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.data = (void *)nct72
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},
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{
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.compatible = "onnn,nct218",
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.data = (void *)nct72
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},
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{
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.compatible = "onnn,nct72",
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.data = (void *)nct72
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},
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{
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.compatible = "winbond,w83l771",
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.data = (void *)w83l771
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},
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{
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.compatible = "nxp,sa56004",
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.data = (void *)sa56004
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},
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{
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.compatible = "ti,tmp451",
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.data = (void *)tmp451
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},
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{
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.compatible = "ti,tmp461",
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.data = (void *)tmp461
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},
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{ },
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};
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MODULE_DEVICE_TABLE(of, lm90_of_match);
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/*
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* chip type specific parameters
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*/
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struct lm90_params {
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u32 flags; /* Capabilities */
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u16 alert_alarms; /* Which alarm bits trigger ALERT# */
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/* Upper 8 bits for max6695/96 */
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u8 max_convrate; /* Maximum conversion rate register value */
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u8 resolution; /* 16-bit resolution (default 11 bit) */
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u8 reg_status2; /* 2nd status register (optional) */
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u8 reg_local_ext; /* Extended local temp register (optional) */
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u8 faultqueue_mask; /* fault queue bit mask */
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u8 faultqueue_depth; /* fault queue depth if mask is used */
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};
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static const struct lm90_params lm90_params[] = {
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[adm1023] = {
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.flags = LM90_HAVE_ALARMS | LM90_HAVE_OFFSET | LM90_HAVE_BROKEN_ALERT
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| LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
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| LM90_HAVE_REMOTE_EXT,
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.alert_alarms = 0x7c,
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.resolution = 8,
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.max_convrate = 7,
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},
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[adm1032] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT
|
|
| LM90_HAVE_PARTIAL_PEC | LM90_HAVE_ALARMS
|
|
| LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 10,
|
|
},
|
|
[adt7461] = {
|
|
/*
|
|
* Standard temperature range is supposed to be unsigned,
|
|
* but that does not match reality. Negative temperatures
|
|
* are always reported.
|
|
*/
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
|
|
| LM90_HAVE_CRIT | LM90_HAVE_PARTIAL_PEC
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 10,
|
|
.resolution = 10,
|
|
},
|
|
[adt7461a] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
|
|
| LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_ALARMS
|
|
| LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 10,
|
|
},
|
|
[adt7481] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
|
|
| LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_PEC
|
|
| LM90_HAVE_TEMP3 | LM90_HAVE_CRIT | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x1c7c,
|
|
.max_convrate = 11,
|
|
.resolution = 10,
|
|
.reg_status2 = ADT7481_REG_STATUS2,
|
|
},
|
|
[g781] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 7,
|
|
},
|
|
[lm84] = {
|
|
.flags = LM90_HAVE_ALARMS,
|
|
.resolution = 8,
|
|
},
|
|
[lm90] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7b,
|
|
.max_convrate = 9,
|
|
.faultqueue_mask = BIT(0),
|
|
.faultqueue_depth = 3,
|
|
},
|
|
[lm99] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7b,
|
|
.max_convrate = 9,
|
|
.faultqueue_mask = BIT(0),
|
|
.faultqueue_depth = 3,
|
|
},
|
|
[max1617] = {
|
|
.flags = LM90_HAVE_CONVRATE | LM90_HAVE_BROKEN_ALERT |
|
|
LM90_HAVE_LOW | LM90_HAVE_ALARMS,
|
|
.alert_alarms = 0x78,
|
|
.resolution = 8,
|
|
.max_convrate = 7,
|
|
},
|
|
[max6642] = {
|
|
.flags = LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXT_UNSIGNED
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x50,
|
|
.resolution = 10,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
.faultqueue_mask = BIT(4),
|
|
.faultqueue_depth = 2,
|
|
},
|
|
[max6646] = {
|
|
.flags = LM90_HAVE_CRIT | LM90_HAVE_BROKEN_ALERT
|
|
| LM90_HAVE_EXT_UNSIGNED | LM90_HAVE_ALARMS | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 6,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
},
|
|
[max6648] = {
|
|
.flags = LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_CRIT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 6,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
},
|
|
[max6654] = {
|
|
.flags = LM90_HAVE_BROKEN_ALERT | LM90_HAVE_ALARMS | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 7,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
},
|
|
[max6657] = {
|
|
.flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 8,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
},
|
|
[max6659] = {
|
|
.flags = LM90_HAVE_EMERGENCY | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 8,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
},
|
|
[max6680] = {
|
|
/*
|
|
* Apparent temperatures of 128 degrees C or higher are reported
|
|
* and treated as negative temperatures (meaning min_alarm will
|
|
* be set).
|
|
*/
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT
|
|
| LM90_HAVE_CRIT_ALRM_SWP | LM90_HAVE_BROKEN_ALERT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 7,
|
|
},
|
|
[max6696] = {
|
|
.flags = LM90_HAVE_EMERGENCY
|
|
| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x1c7c,
|
|
.max_convrate = 6,
|
|
.reg_status2 = MAX6696_REG_STATUS2,
|
|
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
|
|
.faultqueue_mask = BIT(5),
|
|
.faultqueue_depth = 4,
|
|
},
|
|
[nct72] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
|
|
| LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_UNSIGNED_TEMP
|
|
| LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
|
|
| LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 10,
|
|
.resolution = 10,
|
|
},
|
|
[nct210] = {
|
|
.flags = LM90_HAVE_ALARMS | LM90_HAVE_BROKEN_ALERT
|
|
| LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.resolution = 11,
|
|
.max_convrate = 7,
|
|
},
|
|
[ne1618] = {
|
|
.flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_BROKEN_ALERT
|
|
| LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.resolution = 11,
|
|
.max_convrate = 7,
|
|
},
|
|
[w83l771] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 8,
|
|
},
|
|
[sa56004] = {
|
|
/*
|
|
* Apparent temperatures of 128 degrees C or higher are reported
|
|
* and treated as negative temperatures (meaning min_alarm will
|
|
* be set).
|
|
*/
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7b,
|
|
.max_convrate = 9,
|
|
.reg_local_ext = SA56004_REG_LOCAL_TEMPL,
|
|
.faultqueue_mask = BIT(0),
|
|
.faultqueue_depth = 3,
|
|
},
|
|
[tmp451] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT
|
|
| LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_ALARMS | LM90_HAVE_LOW
|
|
| LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 9,
|
|
.resolution = 12,
|
|
.reg_local_ext = TMP451_REG_LOCAL_TEMPL,
|
|
},
|
|
[tmp461] = {
|
|
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
|
|
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT
|
|
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
|
|
| LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
|
|
.alert_alarms = 0x7c,
|
|
.max_convrate = 9,
|
|
.resolution = 12,
|
|
.reg_local_ext = TMP451_REG_LOCAL_TEMPL,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* temperature register index
|
|
*/
|
|
enum lm90_temp_reg_index {
|
|
LOCAL_LOW = 0,
|
|
LOCAL_HIGH,
|
|
LOCAL_CRIT,
|
|
REMOTE_CRIT,
|
|
LOCAL_EMERG, /* max6659 and max6695/96 */
|
|
REMOTE_EMERG, /* max6659 and max6695/96 */
|
|
REMOTE2_CRIT, /* max6695/96 only */
|
|
REMOTE2_EMERG, /* max6695/96 only */
|
|
|
|
REMOTE_TEMP,
|
|
REMOTE_LOW,
|
|
REMOTE_HIGH,
|
|
REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */
|
|
LOCAL_TEMP,
|
|
REMOTE2_TEMP, /* max6695/96 only */
|
|
REMOTE2_LOW, /* max6695/96 only */
|
|
REMOTE2_HIGH, /* max6695/96 only */
|
|
REMOTE2_OFFSET,
|
|
|
|
TEMP_REG_NUM
|
|
};
|
|
|
|
/*
|
|
* Client data (each client gets its own)
|
|
*/
|
|
|
|
struct lm90_data {
|
|
struct i2c_client *client;
|
|
struct device *hwmon_dev;
|
|
u32 chip_config[2];
|
|
u32 channel_config[MAX_CHANNELS + 1];
|
|
const char *channel_label[MAX_CHANNELS];
|
|
struct hwmon_channel_info chip_info;
|
|
struct hwmon_channel_info temp_info;
|
|
const struct hwmon_channel_info *info[3];
|
|
struct hwmon_chip_info chip;
|
|
struct mutex update_lock;
|
|
struct delayed_work alert_work;
|
|
struct work_struct report_work;
|
|
bool valid; /* true if register values are valid */
|
|
bool alarms_valid; /* true if status register values are valid */
|
|
unsigned long last_updated; /* in jiffies */
|
|
unsigned long alarms_updated; /* in jiffies */
|
|
int kind;
|
|
u32 flags;
|
|
|
|
unsigned int update_interval; /* in milliseconds */
|
|
|
|
u8 config; /* Current configuration register value */
|
|
u8 config_orig; /* Original configuration register value */
|
|
u8 convrate_orig; /* Original conversion rate register value */
|
|
u8 resolution; /* temperature resolution in bit */
|
|
u16 alert_alarms; /* Which alarm bits trigger ALERT# */
|
|
/* Upper 8 bits for max6695/96 */
|
|
u8 max_convrate; /* Maximum conversion rate */
|
|
u8 reg_status2; /* 2nd status register (optional) */
|
|
u8 reg_local_ext; /* local extension register offset */
|
|
u8 reg_remote_ext; /* remote temperature low byte */
|
|
u8 faultqueue_mask; /* fault queue mask */
|
|
u8 faultqueue_depth; /* fault queue mask */
|
|
|
|
/* registers values */
|
|
u16 temp[TEMP_REG_NUM];
|
|
u8 temp_hyst;
|
|
u8 conalert;
|
|
u16 reported_alarms; /* alarms reported as sysfs/udev events */
|
|
u16 current_alarms; /* current alarms, reported by chip */
|
|
u16 alarms; /* alarms not yet reported to user */
|
|
};
|
|
|
|
/*
|
|
* Support functions
|
|
*/
|
|
|
|
/*
|
|
* If the chip supports PEC but not on write byte transactions, we need
|
|
* to explicitly ask for a transaction without PEC.
|
|
*/
|
|
static inline s32 lm90_write_no_pec(struct i2c_client *client, u8 value)
|
|
{
|
|
return i2c_smbus_xfer(client->adapter, client->addr,
|
|
client->flags & ~I2C_CLIENT_PEC,
|
|
I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
|
|
}
|
|
|
|
/*
|
|
* It is assumed that client->update_lock is held (unless we are in
|
|
* detection or initialization steps). This matters when PEC is enabled
|
|
* for chips with partial PEC support, because we don't want the address
|
|
* pointer to change between the write byte and the read byte transactions.
|
|
*/
|
|
static int lm90_read_reg(struct i2c_client *client, u8 reg)
|
|
{
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
bool partial_pec = (client->flags & I2C_CLIENT_PEC) &&
|
|
(data->flags & LM90_HAVE_PARTIAL_PEC);
|
|
int err;
|
|
|
|
if (partial_pec) {
|
|
err = lm90_write_no_pec(client, reg);
|
|
if (err)
|
|
return err;
|
|
return i2c_smbus_read_byte(client);
|
|
}
|
|
return i2c_smbus_read_byte_data(client, reg);
|
|
}
|
|
|
|
/*
|
|
* Return register write address
|
|
*
|
|
* The write address for registers 0x03 .. 0x08 is the read address plus 6.
|
|
* For other registers the write address matches the read address.
|
|
*/
|
|
static u8 lm90_write_reg_addr(u8 reg)
|
|
{
|
|
if (reg >= LM90_REG_CONFIG1 && reg <= LM90_REG_REMOTE_LOWH)
|
|
return reg + 6;
|
|
return reg;
|
|
}
|
|
|
|
/*
|
|
* Write into LM90 register.
|
|
* Convert register address to write address if needed, then execute the
|
|
* operation.
|
|
*/
|
|
static int lm90_write_reg(struct i2c_client *client, u8 reg, u8 val)
|
|
{
|
|
return i2c_smbus_write_byte_data(client, lm90_write_reg_addr(reg), val);
|
|
}
|
|
|
|
/*
|
|
* Write into 16-bit LM90 register.
|
|
* Convert register addresses to write address if needed, then execute the
|
|
* operation.
|
|
*/
|
|
static int lm90_write16(struct i2c_client *client, u8 regh, u8 regl, u16 val)
|
|
{
|
|
int ret;
|
|
|
|
ret = lm90_write_reg(client, regh, val >> 8);
|
|
if (ret < 0 || !regl)
|
|
return ret;
|
|
return lm90_write_reg(client, regl, val & 0xff);
|
|
}
|
|
|
|
static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl,
|
|
bool is_volatile)
|
|
{
|
|
int oldh, newh, l;
|
|
|
|
oldh = lm90_read_reg(client, regh);
|
|
if (oldh < 0)
|
|
return oldh;
|
|
|
|
if (!regl)
|
|
return oldh << 8;
|
|
|
|
l = lm90_read_reg(client, regl);
|
|
if (l < 0)
|
|
return l;
|
|
|
|
if (!is_volatile)
|
|
return (oldh << 8) | l;
|
|
|
|
/*
|
|
* For volatile registers we have to use a trick.
|
|
* We have to read two registers to have the sensor temperature,
|
|
* but we have to beware a conversion could occur between the
|
|
* readings. The datasheet says we should either use
|
|
* the one-shot conversion register, which we don't want to do
|
|
* (disables hardware monitoring) or monitor the busy bit, which is
|
|
* impossible (we can't read the values and monitor that bit at the
|
|
* exact same time). So the solution used here is to read the high
|
|
* the high byte again. If the new high byte matches the old one,
|
|
* then we have a valid reading. Otherwise we have to read the low
|
|
* byte again, and now we believe we have a correct reading.
|
|
*/
|
|
newh = lm90_read_reg(client, regh);
|
|
if (newh < 0)
|
|
return newh;
|
|
if (oldh != newh) {
|
|
l = lm90_read_reg(client, regl);
|
|
if (l < 0)
|
|
return l;
|
|
}
|
|
return (newh << 8) | l;
|
|
}
|
|
|
|
static int lm90_update_confreg(struct lm90_data *data, u8 config)
|
|
{
|
|
if (data->config != config) {
|
|
int err;
|
|
|
|
err = lm90_write_reg(data->client, LM90_REG_CONFIG1, config);
|
|
if (err)
|
|
return err;
|
|
data->config = config;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* client->update_lock must be held when calling this function (unless we are
|
|
* in detection or initialization steps), and while a remote channel other
|
|
* than channel 0 is selected. Also, calling code must make sure to re-select
|
|
* external channel 0 before releasing the lock. This is necessary because
|
|
* various registers have different meanings as a result of selecting a
|
|
* non-default remote channel.
|
|
*/
|
|
static int lm90_select_remote_channel(struct lm90_data *data, bool second)
|
|
{
|
|
u8 config = data->config & ~0x08;
|
|
|
|
if (second)
|
|
config |= 0x08;
|
|
|
|
return lm90_update_confreg(data, config);
|
|
}
|
|
|
|
static int lm90_write_convrate(struct lm90_data *data, int val)
|
|
{
|
|
u8 config = data->config;
|
|
int err;
|
|
|
|
/* Save config and pause conversion */
|
|
if (data->flags & LM90_PAUSE_FOR_CONFIG) {
|
|
err = lm90_update_confreg(data, config | 0x40);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
/* Set conv rate */
|
|
err = lm90_write_reg(data->client, LM90_REG_CONVRATE, val);
|
|
|
|
/* Revert change to config */
|
|
lm90_update_confreg(data, config);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Set conversion rate.
|
|
* client->update_lock must be held when calling this function (unless we are
|
|
* in detection or initialization steps).
|
|
*/
|
|
static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
|
|
unsigned int interval)
|
|
{
|
|
unsigned int update_interval;
|
|
int i, err;
|
|
|
|
/* Shift calculations to avoid rounding errors */
|
|
interval <<= 6;
|
|
|
|
/* find the nearest update rate */
|
|
for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
|
|
i < data->max_convrate; i++, update_interval >>= 1)
|
|
if (interval >= update_interval * 3 / 4)
|
|
break;
|
|
|
|
err = lm90_write_convrate(data, i);
|
|
data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
|
|
return err;
|
|
}
|
|
|
|
static int lm90_set_faultqueue(struct i2c_client *client,
|
|
struct lm90_data *data, int val)
|
|
{
|
|
int err;
|
|
|
|
if (data->faultqueue_mask) {
|
|
err = lm90_update_confreg(data, val <= data->faultqueue_depth / 2 ?
|
|
data->config & ~data->faultqueue_mask :
|
|
data->config | data->faultqueue_mask);
|
|
} else {
|
|
static const u8 values[4] = {0, 2, 6, 0x0e};
|
|
|
|
data->conalert = (data->conalert & 0xf1) | values[val - 1];
|
|
err = lm90_write_reg(data->client, TMP451_REG_CONALERT,
|
|
data->conalert);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lm90_update_limits(struct device *dev)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int val;
|
|
|
|
if (data->flags & LM90_HAVE_CRIT) {
|
|
val = lm90_read_reg(client, LM90_REG_LOCAL_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[LOCAL_CRIT] = val << 8;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_REMOTE_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_CRIT] = val << 8;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_TCRIT_HYST);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp_hyst = val;
|
|
}
|
|
if ((data->flags & LM90_HAVE_FAULTQUEUE) && !data->faultqueue_mask) {
|
|
val = lm90_read_reg(client, TMP451_REG_CONALERT);
|
|
if (val < 0)
|
|
return val;
|
|
data->conalert = val;
|
|
}
|
|
|
|
val = lm90_read16(client, LM90_REG_REMOTE_LOWH,
|
|
(data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_LOWL : 0,
|
|
false);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_LOW] = val;
|
|
|
|
val = lm90_read16(client, LM90_REG_REMOTE_HIGHH,
|
|
(data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_HIGHL : 0,
|
|
false);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_HIGH] = val;
|
|
|
|
if (data->flags & LM90_HAVE_OFFSET) {
|
|
val = lm90_read16(client, LM90_REG_REMOTE_OFFSH,
|
|
LM90_REG_REMOTE_OFFSL, false);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_OFFSET] = val;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
val = lm90_read_reg(client, MAX6659_REG_LOCAL_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[LOCAL_EMERG] = val << 8;
|
|
|
|
val = lm90_read_reg(client, MAX6659_REG_REMOTE_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_EMERG] = val << 8;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_TEMP3) {
|
|
val = lm90_select_remote_channel(data, true);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_REMOTE_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE2_CRIT] = val << 8;
|
|
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
val = lm90_read_reg(client, MAX6659_REG_REMOTE_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE2_EMERG] = val << 8;
|
|
}
|
|
|
|
val = lm90_read_reg(client, LM90_REG_REMOTE_LOWH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE2_LOW] = val << 8;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_REMOTE_HIGHH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE2_HIGH] = val << 8;
|
|
|
|
if (data->flags & LM90_HAVE_OFFSET) {
|
|
val = lm90_read16(client, LM90_REG_REMOTE_OFFSH,
|
|
LM90_REG_REMOTE_OFFSL, false);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE2_OFFSET] = val;
|
|
}
|
|
|
|
lm90_select_remote_channel(data, false);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lm90_report_alarms(struct work_struct *work)
|
|
{
|
|
struct lm90_data *data = container_of(work, struct lm90_data, report_work);
|
|
u16 cleared_alarms, new_alarms, current_alarms;
|
|
struct device *hwmon_dev = data->hwmon_dev;
|
|
struct device *dev = &data->client->dev;
|
|
int st, st2;
|
|
|
|
current_alarms = data->current_alarms;
|
|
cleared_alarms = data->reported_alarms & ~current_alarms;
|
|
new_alarms = current_alarms & ~data->reported_alarms;
|
|
|
|
if (!cleared_alarms && !new_alarms)
|
|
return;
|
|
|
|
st = new_alarms & 0xff;
|
|
st2 = new_alarms >> 8;
|
|
|
|
if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
|
|
(st2 & MAX6696_STATUS2_LOT2))
|
|
dev_dbg(dev, "temp%d out of range, please check!\n", 1);
|
|
if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) ||
|
|
(st2 & MAX6696_STATUS2_ROT2))
|
|
dev_dbg(dev, "temp%d out of range, please check!\n", 2);
|
|
if (st & LM90_STATUS_ROPEN)
|
|
dev_dbg(dev, "temp%d diode open, please check!\n", 2);
|
|
if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
|
|
MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
|
|
dev_dbg(dev, "temp%d out of range, please check!\n", 3);
|
|
if (st2 & MAX6696_STATUS2_R2OPEN)
|
|
dev_dbg(dev, "temp%d diode open, please check!\n", 3);
|
|
|
|
st |= cleared_alarms & 0xff;
|
|
st2 |= cleared_alarms >> 8;
|
|
|
|
if (st & LM90_STATUS_LLOW)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 0);
|
|
if (st & LM90_STATUS_RLOW)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 1);
|
|
if (st2 & MAX6696_STATUS2_R2LOW)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 2);
|
|
|
|
if (st & LM90_STATUS_LHIGH)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 0);
|
|
if (st & LM90_STATUS_RHIGH)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 1);
|
|
if (st2 & MAX6696_STATUS2_R2HIGH)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 2);
|
|
|
|
if (st & LM90_STATUS_LTHRM)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 0);
|
|
if (st & LM90_STATUS_RTHRM)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 1);
|
|
if (st2 & MAX6696_STATUS2_R2THRM)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 2);
|
|
|
|
if (st2 & MAX6696_STATUS2_LOT2)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 0);
|
|
if (st2 & MAX6696_STATUS2_ROT2)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 1);
|
|
if (st2 & MAX6696_STATUS2_R2OT2)
|
|
hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 2);
|
|
|
|
data->reported_alarms = current_alarms;
|
|
}
|
|
|
|
static int lm90_update_alarms_locked(struct lm90_data *data, bool force)
|
|
{
|
|
if (force || !data->alarms_valid ||
|
|
time_after(jiffies, data->alarms_updated + msecs_to_jiffies(data->update_interval))) {
|
|
struct i2c_client *client = data->client;
|
|
bool check_enable;
|
|
u16 alarms;
|
|
int val;
|
|
|
|
data->alarms_valid = false;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_STATUS);
|
|
if (val < 0)
|
|
return val;
|
|
alarms = val & ~LM90_STATUS_BUSY;
|
|
|
|
if (data->reg_status2) {
|
|
val = lm90_read_reg(client, data->reg_status2);
|
|
if (val < 0)
|
|
return val;
|
|
alarms |= val << 8;
|
|
}
|
|
/*
|
|
* If the update is forced (called from interrupt or alert
|
|
* handler) and alarm data is valid, the alarms may have been
|
|
* updated after the last update interval, and the status
|
|
* register may still be cleared. Only add additional alarms
|
|
* in this case. Alarms will be cleared later if appropriate.
|
|
*/
|
|
if (force && data->alarms_valid)
|
|
data->current_alarms |= alarms;
|
|
else
|
|
data->current_alarms = alarms;
|
|
data->alarms |= alarms;
|
|
|
|
check_enable = (client->irq || !(data->config_orig & 0x80)) &&
|
|
(data->config & 0x80);
|
|
|
|
if (force || check_enable)
|
|
schedule_work(&data->report_work);
|
|
|
|
/*
|
|
* Re-enable ALERT# output if it was originally enabled, relevant
|
|
* alarms are all clear, and alerts are currently disabled.
|
|
* Otherwise (re)schedule worker if needed.
|
|
*/
|
|
if (check_enable) {
|
|
if (!(data->current_alarms & data->alert_alarms)) {
|
|
dev_dbg(&client->dev, "Re-enabling ALERT#\n");
|
|
lm90_update_confreg(data, data->config & ~0x80);
|
|
/*
|
|
* We may have been called from the update handler.
|
|
* If so, the worker, if scheduled, is no longer
|
|
* needed. Cancel it. Don't synchronize because
|
|
* it may already be running.
|
|
*/
|
|
cancel_delayed_work(&data->alert_work);
|
|
} else {
|
|
schedule_delayed_work(&data->alert_work,
|
|
max_t(int, HZ, msecs_to_jiffies(data->update_interval)));
|
|
}
|
|
}
|
|
data->alarms_updated = jiffies;
|
|
data->alarms_valid = true;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_update_alarms(struct lm90_data *data, bool force)
|
|
{
|
|
int err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
err = lm90_update_alarms_locked(data, force);
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void lm90_alert_work(struct work_struct *__work)
|
|
{
|
|
struct delayed_work *delayed_work = container_of(__work, struct delayed_work, work);
|
|
struct lm90_data *data = container_of(delayed_work, struct lm90_data, alert_work);
|
|
|
|
/* Nothing to do if alerts are enabled */
|
|
if (!(data->config & 0x80))
|
|
return;
|
|
|
|
lm90_update_alarms(data, true);
|
|
}
|
|
|
|
static int lm90_update_device(struct device *dev)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
unsigned long next_update;
|
|
int val;
|
|
|
|
if (!data->valid) {
|
|
val = lm90_update_limits(dev);
|
|
if (val < 0)
|
|
return val;
|
|
}
|
|
|
|
next_update = data->last_updated +
|
|
msecs_to_jiffies(data->update_interval);
|
|
if (time_after(jiffies, next_update) || !data->valid) {
|
|
dev_dbg(&client->dev, "Updating lm90 data.\n");
|
|
|
|
data->valid = false;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_LOCAL_LOW);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[LOCAL_LOW] = val << 8;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_LOCAL_HIGH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[LOCAL_HIGH] = val << 8;
|
|
|
|
val = lm90_read16(client, LM90_REG_LOCAL_TEMP,
|
|
data->reg_local_ext, true);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[LOCAL_TEMP] = val;
|
|
val = lm90_read16(client, LM90_REG_REMOTE_TEMPH,
|
|
data->reg_remote_ext, true);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp[REMOTE_TEMP] = val;
|
|
|
|
if (data->flags & LM90_HAVE_TEMP3) {
|
|
val = lm90_select_remote_channel(data, true);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
val = lm90_read16(client, LM90_REG_REMOTE_TEMPH,
|
|
data->reg_remote_ext, true);
|
|
if (val < 0) {
|
|
lm90_select_remote_channel(data, false);
|
|
return val;
|
|
}
|
|
data->temp[REMOTE2_TEMP] = val;
|
|
|
|
lm90_select_remote_channel(data, false);
|
|
}
|
|
|
|
val = lm90_update_alarms_locked(data, false);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* pec used for devices with PEC support */
|
|
static ssize_t pec_show(struct device *dev, struct device_attribute *dummy,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
|
|
return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
|
|
}
|
|
|
|
static ssize_t pec_store(struct device *dev, struct device_attribute *dummy,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
long val;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &val);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
switch (val) {
|
|
case 0:
|
|
client->flags &= ~I2C_CLIENT_PEC;
|
|
break;
|
|
case 1:
|
|
client->flags |= I2C_CLIENT_PEC;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(pec);
|
|
|
|
static int lm90_temp_get_resolution(struct lm90_data *data, int index)
|
|
{
|
|
switch (index) {
|
|
case REMOTE_TEMP:
|
|
if (data->reg_remote_ext)
|
|
return data->resolution;
|
|
return 8;
|
|
case REMOTE_OFFSET:
|
|
case REMOTE2_OFFSET:
|
|
case REMOTE2_TEMP:
|
|
return data->resolution;
|
|
case LOCAL_TEMP:
|
|
if (data->reg_local_ext)
|
|
return data->resolution;
|
|
return 8;
|
|
case REMOTE_LOW:
|
|
case REMOTE_HIGH:
|
|
case REMOTE2_LOW:
|
|
case REMOTE2_HIGH:
|
|
if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
return data->resolution;
|
|
return 8;
|
|
default:
|
|
return 8;
|
|
}
|
|
}
|
|
|
|
static int lm90_temp_from_reg(u32 flags, u16 regval, u8 resolution)
|
|
{
|
|
int val;
|
|
|
|
if (flags & LM90_HAVE_EXTENDED_TEMP)
|
|
val = regval - 0x4000;
|
|
else if (flags & (LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_EXT_UNSIGNED))
|
|
val = regval;
|
|
else
|
|
val = (s16)regval;
|
|
|
|
return ((val >> (16 - resolution)) * 1000) >> (resolution - 8);
|
|
}
|
|
|
|
static int lm90_get_temp(struct lm90_data *data, int index, int channel)
|
|
{
|
|
int temp = lm90_temp_from_reg(data->flags, data->temp[index],
|
|
lm90_temp_get_resolution(data, index));
|
|
|
|
/* +16 degrees offset for remote temperature on LM99 */
|
|
if (data->kind == lm99 && channel)
|
|
temp += 16000;
|
|
|
|
return temp;
|
|
}
|
|
|
|
static u16 lm90_temp_to_reg(u32 flags, long val, u8 resolution)
|
|
{
|
|
int fraction = resolution > 8 ?
|
|
1000 - DIV_ROUND_CLOSEST(1000, BIT(resolution - 8)) : 0;
|
|
|
|
if (flags & LM90_HAVE_EXTENDED_TEMP) {
|
|
val = clamp_val(val, -64000, 191000 + fraction);
|
|
val += 64000;
|
|
} else if (flags & LM90_HAVE_EXT_UNSIGNED) {
|
|
val = clamp_val(val, 0, 255000 + fraction);
|
|
} else if (flags & LM90_HAVE_UNSIGNED_TEMP) {
|
|
val = clamp_val(val, 0, 127000 + fraction);
|
|
} else {
|
|
val = clamp_val(val, -128000, 127000 + fraction);
|
|
}
|
|
|
|
return DIV_ROUND_CLOSEST(val << (resolution - 8), 1000) << (16 - resolution);
|
|
}
|
|
|
|
static int lm90_set_temp(struct lm90_data *data, int index, int channel, long val)
|
|
{
|
|
static const u8 regs[] = {
|
|
[LOCAL_LOW] = LM90_REG_LOCAL_LOW,
|
|
[LOCAL_HIGH] = LM90_REG_LOCAL_HIGH,
|
|
[LOCAL_CRIT] = LM90_REG_LOCAL_CRIT,
|
|
[REMOTE_CRIT] = LM90_REG_REMOTE_CRIT,
|
|
[LOCAL_EMERG] = MAX6659_REG_LOCAL_EMERG,
|
|
[REMOTE_EMERG] = MAX6659_REG_REMOTE_EMERG,
|
|
[REMOTE2_CRIT] = LM90_REG_REMOTE_CRIT,
|
|
[REMOTE2_EMERG] = MAX6659_REG_REMOTE_EMERG,
|
|
[REMOTE_LOW] = LM90_REG_REMOTE_LOWH,
|
|
[REMOTE_HIGH] = LM90_REG_REMOTE_HIGHH,
|
|
[REMOTE2_LOW] = LM90_REG_REMOTE_LOWH,
|
|
[REMOTE2_HIGH] = LM90_REG_REMOTE_HIGHH,
|
|
};
|
|
struct i2c_client *client = data->client;
|
|
u8 regh = regs[index];
|
|
u8 regl = 0;
|
|
int err;
|
|
|
|
if (channel && (data->flags & LM90_HAVE_REM_LIMIT_EXT)) {
|
|
if (index == REMOTE_LOW || index == REMOTE2_LOW)
|
|
regl = LM90_REG_REMOTE_LOWL;
|
|
else if (index == REMOTE_HIGH || index == REMOTE2_HIGH)
|
|
regl = LM90_REG_REMOTE_HIGHL;
|
|
}
|
|
|
|
/* +16 degrees offset for remote temperature on LM99 */
|
|
if (data->kind == lm99 && channel) {
|
|
/* prevent integer underflow */
|
|
val = max(val, -128000l);
|
|
val -= 16000;
|
|
}
|
|
|
|
data->temp[index] = lm90_temp_to_reg(data->flags, val,
|
|
lm90_temp_get_resolution(data, index));
|
|
|
|
if (channel > 1)
|
|
lm90_select_remote_channel(data, true);
|
|
|
|
err = lm90_write16(client, regh, regl, data->temp[index]);
|
|
|
|
if (channel > 1)
|
|
lm90_select_remote_channel(data, false);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lm90_get_temphyst(struct lm90_data *data, int index, int channel)
|
|
{
|
|
int temp = lm90_get_temp(data, index, channel);
|
|
|
|
return temp - data->temp_hyst * 1000;
|
|
}
|
|
|
|
static int lm90_set_temphyst(struct lm90_data *data, long val)
|
|
{
|
|
int temp = lm90_get_temp(data, LOCAL_CRIT, 0);
|
|
|
|
/* prevent integer overflow/underflow */
|
|
val = clamp_val(val, -128000l, 255000l);
|
|
data->temp_hyst = clamp_val(DIV_ROUND_CLOSEST(temp - val, 1000), 0, 31);
|
|
|
|
return lm90_write_reg(data->client, LM90_REG_TCRIT_HYST, data->temp_hyst);
|
|
}
|
|
|
|
static int lm90_get_temp_offset(struct lm90_data *data, int index)
|
|
{
|
|
int res = lm90_temp_get_resolution(data, index);
|
|
|
|
return lm90_temp_from_reg(0, data->temp[index], res);
|
|
}
|
|
|
|
static int lm90_set_temp_offset(struct lm90_data *data, int index, int channel, long val)
|
|
{
|
|
int err;
|
|
|
|
val = lm90_temp_to_reg(0, val, lm90_temp_get_resolution(data, index));
|
|
|
|
/* For ADT7481 we can use the same registers for remote channel 1 and 2 */
|
|
if (channel > 1)
|
|
lm90_select_remote_channel(data, true);
|
|
|
|
err = lm90_write16(data->client, LM90_REG_REMOTE_OFFSH, LM90_REG_REMOTE_OFFSL, val);
|
|
|
|
if (channel > 1)
|
|
lm90_select_remote_channel(data, false);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
data->temp[index] = val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const u8 lm90_temp_index[MAX_CHANNELS] = {
|
|
LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP
|
|
};
|
|
|
|
static const u8 lm90_temp_min_index[MAX_CHANNELS] = {
|
|
LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW
|
|
};
|
|
|
|
static const u8 lm90_temp_max_index[MAX_CHANNELS] = {
|
|
LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH
|
|
};
|
|
|
|
static const u8 lm90_temp_crit_index[MAX_CHANNELS] = {
|
|
LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT
|
|
};
|
|
|
|
static const u8 lm90_temp_emerg_index[MAX_CHANNELS] = {
|
|
LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG
|
|
};
|
|
|
|
static const s8 lm90_temp_offset_index[MAX_CHANNELS] = {
|
|
-1, REMOTE_OFFSET, REMOTE2_OFFSET
|
|
};
|
|
|
|
static const u16 lm90_min_alarm_bits[MAX_CHANNELS] = { BIT(5), BIT(3), BIT(11) };
|
|
static const u16 lm90_max_alarm_bits[MAX_CHANNELS] = { BIT(6), BIT(4), BIT(12) };
|
|
static const u16 lm90_crit_alarm_bits[MAX_CHANNELS] = { BIT(0), BIT(1), BIT(9) };
|
|
static const u16 lm90_crit_alarm_bits_swapped[MAX_CHANNELS] = { BIT(1), BIT(0), BIT(9) };
|
|
static const u16 lm90_emergency_alarm_bits[MAX_CHANNELS] = { BIT(15), BIT(13), BIT(14) };
|
|
static const u16 lm90_fault_bits[MAX_CHANNELS] = { BIT(0), BIT(2), BIT(10) };
|
|
|
|
static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
int err;
|
|
u16 bit;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
err = lm90_update_device(dev);
|
|
mutex_unlock(&data->update_lock);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_input:
|
|
*val = lm90_get_temp(data, lm90_temp_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_min_alarm:
|
|
case hwmon_temp_max_alarm:
|
|
case hwmon_temp_crit_alarm:
|
|
case hwmon_temp_emergency_alarm:
|
|
case hwmon_temp_fault:
|
|
switch (attr) {
|
|
case hwmon_temp_min_alarm:
|
|
bit = lm90_min_alarm_bits[channel];
|
|
break;
|
|
case hwmon_temp_max_alarm:
|
|
bit = lm90_max_alarm_bits[channel];
|
|
break;
|
|
case hwmon_temp_crit_alarm:
|
|
if (data->flags & LM90_HAVE_CRIT_ALRM_SWP)
|
|
bit = lm90_crit_alarm_bits_swapped[channel];
|
|
else
|
|
bit = lm90_crit_alarm_bits[channel];
|
|
break;
|
|
case hwmon_temp_emergency_alarm:
|
|
bit = lm90_emergency_alarm_bits[channel];
|
|
break;
|
|
case hwmon_temp_fault:
|
|
bit = lm90_fault_bits[channel];
|
|
break;
|
|
}
|
|
*val = !!(data->alarms & bit);
|
|
data->alarms &= ~bit;
|
|
data->alarms |= data->current_alarms;
|
|
break;
|
|
case hwmon_temp_min:
|
|
*val = lm90_get_temp(data, lm90_temp_min_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_max:
|
|
*val = lm90_get_temp(data, lm90_temp_max_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_crit:
|
|
*val = lm90_get_temp(data, lm90_temp_crit_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_crit_hyst:
|
|
*val = lm90_get_temphyst(data, lm90_temp_crit_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_emergency:
|
|
*val = lm90_get_temp(data, lm90_temp_emerg_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_emergency_hyst:
|
|
*val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel], channel);
|
|
break;
|
|
case hwmon_temp_offset:
|
|
*val = lm90_get_temp_offset(data, lm90_temp_offset_index[channel]);
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
err = lm90_update_device(dev);
|
|
if (err)
|
|
goto error;
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_min:
|
|
err = lm90_set_temp(data, lm90_temp_min_index[channel],
|
|
channel, val);
|
|
break;
|
|
case hwmon_temp_max:
|
|
err = lm90_set_temp(data, lm90_temp_max_index[channel],
|
|
channel, val);
|
|
break;
|
|
case hwmon_temp_crit:
|
|
err = lm90_set_temp(data, lm90_temp_crit_index[channel],
|
|
channel, val);
|
|
break;
|
|
case hwmon_temp_crit_hyst:
|
|
err = lm90_set_temphyst(data, val);
|
|
break;
|
|
case hwmon_temp_emergency:
|
|
err = lm90_set_temp(data, lm90_temp_emerg_index[channel],
|
|
channel, val);
|
|
break;
|
|
case hwmon_temp_offset:
|
|
err = lm90_set_temp_offset(data, lm90_temp_offset_index[channel],
|
|
channel, val);
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
error:
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel)
|
|
{
|
|
switch (attr) {
|
|
case hwmon_temp_input:
|
|
case hwmon_temp_min_alarm:
|
|
case hwmon_temp_max_alarm:
|
|
case hwmon_temp_crit_alarm:
|
|
case hwmon_temp_emergency_alarm:
|
|
case hwmon_temp_emergency_hyst:
|
|
case hwmon_temp_fault:
|
|
case hwmon_temp_label:
|
|
return 0444;
|
|
case hwmon_temp_min:
|
|
case hwmon_temp_max:
|
|
case hwmon_temp_crit:
|
|
case hwmon_temp_emergency:
|
|
case hwmon_temp_offset:
|
|
return 0644;
|
|
case hwmon_temp_crit_hyst:
|
|
if (channel == 0)
|
|
return 0644;
|
|
return 0444;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
err = lm90_update_device(dev);
|
|
mutex_unlock(&data->update_lock);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (attr) {
|
|
case hwmon_chip_update_interval:
|
|
*val = data->update_interval;
|
|
break;
|
|
case hwmon_chip_alarms:
|
|
*val = data->alarms;
|
|
break;
|
|
case hwmon_chip_temp_samples:
|
|
if (data->faultqueue_mask) {
|
|
*val = (data->config & data->faultqueue_mask) ?
|
|
data->faultqueue_depth : 1;
|
|
} else {
|
|
switch (data->conalert & 0x0e) {
|
|
case 0x0:
|
|
default:
|
|
*val = 1;
|
|
break;
|
|
case 0x2:
|
|
*val = 2;
|
|
break;
|
|
case 0x6:
|
|
*val = 3;
|
|
break;
|
|
case 0xe:
|
|
*val = 4;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
err = lm90_update_device(dev);
|
|
if (err)
|
|
goto error;
|
|
|
|
switch (attr) {
|
|
case hwmon_chip_update_interval:
|
|
err = lm90_set_convrate(client, data,
|
|
clamp_val(val, 0, 100000));
|
|
break;
|
|
case hwmon_chip_temp_samples:
|
|
err = lm90_set_faultqueue(client, data, clamp_val(val, 1, 4));
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
error:
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel)
|
|
{
|
|
switch (attr) {
|
|
case hwmon_chip_update_interval:
|
|
case hwmon_chip_temp_samples:
|
|
return 0644;
|
|
case hwmon_chip_alarms:
|
|
return 0444;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int lm90_read(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long *val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_chip:
|
|
return lm90_chip_read(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return lm90_temp_read(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int lm90_read_string(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, const char **str)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
|
|
*str = data->channel_label[channel];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_write(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_chip:
|
|
return lm90_chip_write(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return lm90_temp_write(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type,
|
|
u32 attr, int channel)
|
|
{
|
|
switch (type) {
|
|
case hwmon_chip:
|
|
return lm90_chip_is_visible(data, attr, channel);
|
|
case hwmon_temp:
|
|
return lm90_temp_is_visible(data, attr, channel);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static const char *lm90_detect_lm84(struct i2c_client *client)
|
|
{
|
|
static const u8 regs[] = {
|
|
LM90_REG_STATUS, LM90_REG_LOCAL_TEMP, LM90_REG_LOCAL_HIGH,
|
|
LM90_REG_REMOTE_TEMPH, LM90_REG_REMOTE_HIGHH
|
|
};
|
|
int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS);
|
|
int reg1, reg2, reg3, reg4;
|
|
bool nonzero = false;
|
|
u8 ff = 0xff;
|
|
int i;
|
|
|
|
if (status < 0 || (status & 0xab))
|
|
return NULL;
|
|
|
|
/*
|
|
* For LM84, undefined registers return the most recent value.
|
|
* Repeat several times, each time checking against a different
|
|
* (presumably) existing register.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(regs); i++) {
|
|
reg1 = i2c_smbus_read_byte_data(client, regs[i]);
|
|
reg2 = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL);
|
|
reg3 = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW);
|
|
reg4 = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH);
|
|
|
|
if (reg1 < 0)
|
|
return NULL;
|
|
|
|
/* If any register has a different value, this is not an LM84 */
|
|
if (reg2 != reg1 || reg3 != reg1 || reg4 != reg1)
|
|
return NULL;
|
|
|
|
nonzero |= reg1 || reg2 || reg3 || reg4;
|
|
ff &= reg1;
|
|
}
|
|
/*
|
|
* If all registers always returned 0 or 0xff, all bets are off,
|
|
* and we can not make any predictions about the chip type.
|
|
*/
|
|
return nonzero && ff != 0xff ? "lm84" : NULL;
|
|
}
|
|
|
|
static const char *lm90_detect_max1617(struct i2c_client *client, int config1)
|
|
{
|
|
int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS);
|
|
int llo, rlo, lhi, rhi;
|
|
|
|
if (status < 0 || (status & 0x03))
|
|
return NULL;
|
|
|
|
if (config1 & 0x3f)
|
|
return NULL;
|
|
|
|
/*
|
|
* Fail if unsupported registers return anything but 0xff.
|
|
* The calling code already checked man_id and chip_id.
|
|
* A byte read operation repeats the most recent read operation
|
|
* and should also return 0xff.
|
|
*/
|
|
if (i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL) != 0xff ||
|
|
i2c_smbus_read_byte_data(client, MAX6657_REG_LOCAL_TEMPL) != 0xff ||
|
|
i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWL) != 0xff ||
|
|
i2c_smbus_read_byte(client) != 0xff)
|
|
return NULL;
|
|
|
|
llo = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW);
|
|
rlo = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH);
|
|
|
|
lhi = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_HIGH);
|
|
rhi = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_HIGHH);
|
|
|
|
if (llo < 0 || rlo < 0)
|
|
return NULL;
|
|
|
|
/*
|
|
* A byte read operation repeats the most recent read and should
|
|
* return the same value.
|
|
*/
|
|
if (i2c_smbus_read_byte(client) != rhi)
|
|
return NULL;
|
|
|
|
/*
|
|
* The following two checks are marginal since the checked values
|
|
* are strictly speaking valid.
|
|
*/
|
|
|
|
/* fail for negative high limits; this also catches read errors */
|
|
if ((s8)lhi < 0 || (s8)rhi < 0)
|
|
return NULL;
|
|
|
|
/* fail if low limits are larger than or equal to high limits */
|
|
if ((s8)llo >= lhi || (s8)rlo >= rhi)
|
|
return NULL;
|
|
|
|
if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
/*
|
|
* Word read operations return 0xff in second byte
|
|
*/
|
|
if (i2c_smbus_read_word_data(client, LM90_REG_REMOTE_TEMPL) !=
|
|
0xffff)
|
|
return NULL;
|
|
if (i2c_smbus_read_word_data(client, LM90_REG_CONFIG1) !=
|
|
(config1 | 0xff00))
|
|
return NULL;
|
|
if (i2c_smbus_read_word_data(client, LM90_REG_LOCAL_HIGH) !=
|
|
(lhi | 0xff00))
|
|
return NULL;
|
|
}
|
|
|
|
return "max1617";
|
|
}
|
|
|
|
static const char *lm90_detect_national(struct i2c_client *client, int chip_id,
|
|
int config1, int convrate)
|
|
{
|
|
int config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2);
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
if (config2 < 0)
|
|
return NULL;
|
|
|
|
if ((config1 & 0x2a) || (config2 & 0xf8) || convrate > 0x09)
|
|
return NULL;
|
|
|
|
if (address != 0x4c && address != 0x4d)
|
|
return NULL;
|
|
|
|
switch (chip_id & 0xf0) {
|
|
case 0x10: /* LM86 */
|
|
if (address == 0x4c)
|
|
name = "lm86";
|
|
break;
|
|
case 0x20: /* LM90 */
|
|
if (address == 0x4c)
|
|
name = "lm90";
|
|
break;
|
|
case 0x30: /* LM89/LM99 */
|
|
name = "lm99"; /* detect LM89 as LM99 */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_on(struct i2c_client *client, int chip_id, int config1,
|
|
int convrate)
|
|
{
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
switch (chip_id) {
|
|
case 0xca: /* NCT218 */
|
|
if ((address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
|
|
convrate <= 0x0a)
|
|
name = "nct218";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_analog(struct i2c_client *client, bool common_address,
|
|
int chip_id, int config1, int convrate)
|
|
{
|
|
int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS);
|
|
int config2 = i2c_smbus_read_byte_data(client, ADT7481_REG_CONFIG2);
|
|
int man_id2 = i2c_smbus_read_byte_data(client, ADT7481_REG_MAN_ID);
|
|
int chip_id2 = i2c_smbus_read_byte_data(client, ADT7481_REG_CHIP_ID);
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
if (status < 0 || config2 < 0 || man_id2 < 0 || chip_id2 < 0)
|
|
return NULL;
|
|
|
|
/*
|
|
* The following chips should be detected by this function. Known
|
|
* register values are listed. Registers 0x3d .. 0x3e are undocumented
|
|
* for most of the chips, yet appear to return a well defined value.
|
|
* Register 0xff is undocumented for some of the chips. Register 0x3f
|
|
* is undocumented for all chips, but also returns a well defined value.
|
|
* Values are as reported from real chips unless mentioned otherwise.
|
|
* The code below checks values for registers 0x3d, 0x3e, and 0xff,
|
|
* but not for register 0x3f.
|
|
*
|
|
* Chip Register
|
|
* 3d 3e 3f fe ff Notes
|
|
* ----------------------------------------------------------
|
|
* adm1020 00 00 00 41 39
|
|
* adm1021 00 00 00 41 03
|
|
* adm1021a 00 00 00 41 3c
|
|
* adm1023 00 00 00 41 3c same as adm1021a
|
|
* adm1032 00 00 00 41 42
|
|
*
|
|
* adt7421 21 41 04 41 04
|
|
* adt7461 00 00 00 41 51
|
|
* adt7461a 61 41 05 41 57
|
|
* adt7481 81 41 02 41 62
|
|
* adt7482 - - - 41 65 datasheet
|
|
* 82 41 05 41 75 real chip
|
|
* adt7483 83 41 04 41 94
|
|
*
|
|
* nct72 61 41 07 41 55
|
|
* nct210 00 00 00 41 3f
|
|
* nct214 61 41 08 41 5a
|
|
* nct1008 - - - 41 57 datasheet rev. 3
|
|
* 61 41 06 41 54 real chip
|
|
*
|
|
* nvt210 - - - 41 - datasheet
|
|
* nvt211 - - - 41 - datasheet
|
|
*/
|
|
switch (chip_id) {
|
|
case 0x00 ... 0x03: /* ADM1021 */
|
|
case 0x05 ... 0x0f:
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address &&
|
|
!(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "adm1021";
|
|
break;
|
|
case 0x04: /* ADT7421 (undocumented) */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x21 &&
|
|
(address == 0x4c || address == 0x4d) &&
|
|
(config1 & 0x0b) == 0x08 && convrate <= 0x0a)
|
|
name = "adt7421";
|
|
break;
|
|
case 0x30 ... 0x38: /* ADM1021A, ADM1023 */
|
|
case 0x3a ... 0x3e:
|
|
/*
|
|
* ADM1021A and compatible chips will be mis-detected as
|
|
* ADM1023. Chips labeled 'ADM1021A' and 'ADM1023' were both
|
|
* found to have a Chip ID of 0x3c.
|
|
* ADM1021A does not officially support low byte registers
|
|
* (0x12 .. 0x14), but a chip labeled ADM1021A does support it.
|
|
* Official support for the temperature offset high byte
|
|
* register (0x11) was added to revision F of the ADM1021A
|
|
* datasheet.
|
|
* It is currently unknown if there is a means to distinguish
|
|
* ADM1021A from ADM1023, and/or if revisions of ADM1021A exist
|
|
* which differ in functionality from ADM1023.
|
|
*/
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address &&
|
|
!(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "adm1023";
|
|
break;
|
|
case 0x39: /* ADM1020 (undocumented) */
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 &&
|
|
(address == 0x4c || address == 0x4d || address == 0x4e) &&
|
|
!(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "adm1020";
|
|
break;
|
|
case 0x3f: /* NCT210 */
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address &&
|
|
!(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "nct210";
|
|
break;
|
|
case 0x40 ... 0x4f: /* ADM1032 */
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 &&
|
|
(address == 0x4c || address == 0x4d) && !(config1 & 0x3f) &&
|
|
convrate <= 0x0a)
|
|
name = "adm1032";
|
|
break;
|
|
case 0x51: /* ADT7461 */
|
|
if (man_id2 == 0x00 && chip_id2 == 0x00 &&
|
|
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
|
|
convrate <= 0x0a)
|
|
name = "adt7461";
|
|
break;
|
|
case 0x54: /* NCT1008 */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
|
|
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
|
|
convrate <= 0x0a)
|
|
name = "nct1008";
|
|
break;
|
|
case 0x55: /* NCT72 */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
|
|
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
|
|
convrate <= 0x0a)
|
|
name = "nct72";
|
|
break;
|
|
case 0x57: /* ADT7461A, NCT1008 (datasheet rev. 3) */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
|
|
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
|
|
convrate <= 0x0a)
|
|
name = "adt7461a";
|
|
break;
|
|
case 0x5a: /* NCT214 */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
|
|
common_address && !(config1 & 0x1b) && convrate <= 0x0a)
|
|
name = "nct214";
|
|
break;
|
|
case 0x62: /* ADT7481, undocumented */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x81 &&
|
|
(address == 0x4b || address == 0x4c) && !(config1 & 0x10) &&
|
|
!(config2 & 0x7f) && (convrate & 0x0f) <= 0x0b) {
|
|
name = "adt7481";
|
|
}
|
|
break;
|
|
case 0x65: /* ADT7482, datasheet */
|
|
case 0x75: /* ADT7482, real chip */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x82 &&
|
|
address == 0x4c && !(config1 & 0x10) && !(config2 & 0x7f) &&
|
|
convrate <= 0x0a)
|
|
name = "adt7482";
|
|
break;
|
|
case 0x94: /* ADT7483 */
|
|
if (man_id2 == 0x41 && chip_id2 == 0x83 &&
|
|
common_address &&
|
|
((address >= 0x18 && address <= 0x1a) ||
|
|
(address >= 0x29 && address <= 0x2b) ||
|
|
(address >= 0x4c && address <= 0x4e)) &&
|
|
!(config1 & 0x10) && !(config2 & 0x7f) && convrate <= 0x0a)
|
|
name = "adt7483a";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_maxim(struct i2c_client *client, bool common_address,
|
|
int chip_id, int config1, int convrate)
|
|
{
|
|
int man_id, emerg, emerg2, status2;
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
switch (chip_id) {
|
|
case 0x01:
|
|
if (!common_address)
|
|
break;
|
|
|
|
/*
|
|
* We read MAX6659_REG_REMOTE_EMERG twice, and re-read
|
|
* LM90_REG_MAN_ID in between. If MAX6659_REG_REMOTE_EMERG
|
|
* exists, both readings will reflect the same value. Otherwise,
|
|
* the readings will be different.
|
|
*/
|
|
emerg = i2c_smbus_read_byte_data(client,
|
|
MAX6659_REG_REMOTE_EMERG);
|
|
man_id = i2c_smbus_read_byte_data(client,
|
|
LM90_REG_MAN_ID);
|
|
emerg2 = i2c_smbus_read_byte_data(client,
|
|
MAX6659_REG_REMOTE_EMERG);
|
|
status2 = i2c_smbus_read_byte_data(client,
|
|
MAX6696_REG_STATUS2);
|
|
if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
|
|
return NULL;
|
|
|
|
/*
|
|
* Even though MAX6695 and MAX6696 do not have a chip ID
|
|
* register, reading it returns 0x01. Bit 4 of the config1
|
|
* register is unused and should return zero when read. Bit 0 of
|
|
* the status2 register is unused and should return zero when
|
|
* read.
|
|
*
|
|
* MAX6695 and MAX6696 have an additional set of temperature
|
|
* limit registers. We can detect those chips by checking if
|
|
* one of those registers exists.
|
|
*/
|
|
if (!(config1 & 0x10) && !(status2 & 0x01) && emerg == emerg2 &&
|
|
convrate <= 0x07)
|
|
name = "max6696";
|
|
/*
|
|
* The chip_id register of the MAX6680 and MAX6681 holds the
|
|
* revision of the chip. The lowest bit of the config1 register
|
|
* is unused and should return zero when read, so should the
|
|
* second to last bit of config1 (software reset). Register
|
|
* address 0x12 (LM90_REG_REMOTE_OFFSL) exists for this chip and
|
|
* should differ from emerg2, and emerg2 should match man_id
|
|
* since it does not exist.
|
|
*/
|
|
else if (!(config1 & 0x03) && convrate <= 0x07 &&
|
|
emerg2 == man_id && emerg2 != status2)
|
|
name = "max6680";
|
|
/*
|
|
* MAX1617A does not have any extended registers (register
|
|
* address 0x10 or higher) except for manufacturer and
|
|
* device ID registers. Unlike other chips of this series,
|
|
* unsupported registers were observed to return a fixed value
|
|
* of 0x01.
|
|
* Note: Multiple chips with different markings labeled as
|
|
* "MAX1617" (no "A") were observed to report manufacturer ID
|
|
* 0x4d and device ID 0x01. It is unknown if other variants of
|
|
* MAX1617/MAX617A with different behavior exist. The detection
|
|
* code below works for those chips.
|
|
*/
|
|
else if (!(config1 & 0x03f) && convrate <= 0x07 &&
|
|
emerg == 0x01 && emerg2 == 0x01 && status2 == 0x01)
|
|
name = "max1617";
|
|
break;
|
|
case 0x08:
|
|
/*
|
|
* The chip_id of the MAX6654 holds the revision of the chip.
|
|
* The lowest 3 bits of the config1 register are unused and
|
|
* should return zero when read.
|
|
*/
|
|
if (common_address && !(config1 & 0x07) && convrate <= 0x07)
|
|
name = "max6654";
|
|
break;
|
|
case 0x09:
|
|
/*
|
|
* The chip_id of the MAX6690 holds the revision of the chip.
|
|
* The lowest 3 bits of the config1 register are unused and
|
|
* should return zero when read.
|
|
* Note that MAX6654 and MAX6690 are practically the same chips.
|
|
* The only diference is the rated accuracy. Rev. 1 of the
|
|
* MAX6690 datasheet lists a chip ID of 0x08, and a chip labeled
|
|
* MAX6654 was observed to have a chip ID of 0x09.
|
|
*/
|
|
if (common_address && !(config1 & 0x07) && convrate <= 0x07)
|
|
name = "max6690";
|
|
break;
|
|
case 0x4d:
|
|
/*
|
|
* MAX6642, MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
|
|
* register. Reading from that address will return the last
|
|
* read value, which in our case is those of the man_id
|
|
* register, or 0x4d.
|
|
* MAX6642 does not have a conversion rate register, nor low
|
|
* limit registers. Reading from those registers returns the
|
|
* last read value.
|
|
*
|
|
* For MAX6657, MAX6658 and MAX6659, the config1 register lacks
|
|
* a low nibble, so the value will be those of the previous
|
|
* read, so in our case again those of the man_id register.
|
|
* MAX6659 has a third set of upper temperature limit registers.
|
|
* Those registers also return values on MAX6657 and MAX6658,
|
|
* thus the only way to detect MAX6659 is by its address.
|
|
* For this reason it will be mis-detected as MAX6657 if its
|
|
* address is 0x4c.
|
|
*/
|
|
if (address >= 0x48 && address <= 0x4f && config1 == convrate &&
|
|
!(config1 & 0x0f)) {
|
|
int regval;
|
|
|
|
/*
|
|
* We know that this is not a MAX6657/58/59 because its
|
|
* configuration register has the wrong value and it does
|
|
* not appear to have a conversion rate register.
|
|
*/
|
|
|
|
/* re-read manufacturer ID to have a good baseline */
|
|
if (i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID) != 0x4d)
|
|
break;
|
|
|
|
/* check various non-existing registers */
|
|
if (i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE) != 0x4d ||
|
|
i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW) != 0x4d ||
|
|
i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH) != 0x4d)
|
|
break;
|
|
|
|
/* check for unused status register bits */
|
|
regval = i2c_smbus_read_byte_data(client, LM90_REG_STATUS);
|
|
if (regval < 0 || (regval & 0x2b))
|
|
break;
|
|
|
|
/* re-check unsupported registers */
|
|
if (i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE) != regval ||
|
|
i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW) != regval ||
|
|
i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH) != regval)
|
|
break;
|
|
|
|
name = "max6642";
|
|
} else if ((address == 0x4c || address == 0x4d || address == 0x4e) &&
|
|
(config1 & 0x1f) == 0x0d && convrate <= 0x09) {
|
|
if (address == 0x4c)
|
|
name = "max6657";
|
|
else
|
|
name = "max6659";
|
|
}
|
|
break;
|
|
case 0x59:
|
|
/*
|
|
* The chip_id register of the MAX6646/6647/6649 holds the
|
|
* revision of the chip. The lowest 6 bits of the config1
|
|
* register are unused and should return zero when read.
|
|
* The I2C address of MAX6648/6692 is fixed at 0x4c.
|
|
* MAX6646 is at address 0x4d, MAX6647 is at address 0x4e,
|
|
* and MAX6649 is at address 0x4c. A slight difference between
|
|
* the two sets of chips is that the remote temperature register
|
|
* reports different values if the DXP pin is open or shorted.
|
|
* We can use that information to help distinguish between the
|
|
* chips. MAX6648 will be mis-detected as MAX6649 if the remote
|
|
* diode is connected, but there isn't really anything we can
|
|
* do about that.
|
|
*/
|
|
if (!(config1 & 0x3f) && convrate <= 0x07) {
|
|
int temp;
|
|
|
|
switch (address) {
|
|
case 0x4c:
|
|
/*
|
|
* MAX6649 reports an external temperature
|
|
* value of 0xff if DXP is open or shorted.
|
|
* MAX6648 reports 0x80 in that case.
|
|
*/
|
|
temp = i2c_smbus_read_byte_data(client,
|
|
LM90_REG_REMOTE_TEMPH);
|
|
if (temp == 0x80)
|
|
name = "max6648";
|
|
else
|
|
name = "max6649";
|
|
break;
|
|
case 0x4d:
|
|
name = "max6646";
|
|
break;
|
|
case 0x4e:
|
|
name = "max6647";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_nuvoton(struct i2c_client *client, int chip_id,
|
|
int config1, int convrate)
|
|
{
|
|
int config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2);
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
if (config2 < 0)
|
|
return NULL;
|
|
|
|
if (address == 0x4c && !(config1 & 0x2a) && !(config2 & 0xf8)) {
|
|
if (chip_id == 0x01 && convrate <= 0x09) {
|
|
/* W83L771W/G */
|
|
name = "w83l771";
|
|
} else if ((chip_id & 0xfe) == 0x10 && convrate <= 0x08) {
|
|
/* W83L771AWG/ASG */
|
|
name = "w83l771";
|
|
}
|
|
}
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_nxp(struct i2c_client *client, bool common_address,
|
|
int chip_id, int config1, int convrate)
|
|
{
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
int config2;
|
|
|
|
switch (chip_id) {
|
|
case 0x00:
|
|
config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2);
|
|
if (config2 < 0)
|
|
return NULL;
|
|
if (address >= 0x48 && address <= 0x4f &&
|
|
!(config1 & 0x2a) && !(config2 & 0xfe) && convrate <= 0x09)
|
|
name = "sa56004";
|
|
break;
|
|
case 0x80:
|
|
if (common_address && !(config1 & 0x3f) && convrate <= 0x07)
|
|
name = "ne1618";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return name;
|
|
}
|
|
|
|
static const char *lm90_detect_gmt(struct i2c_client *client, int chip_id,
|
|
int config1, int convrate)
|
|
{
|
|
int address = client->addr;
|
|
|
|
/*
|
|
* According to the datasheet, G781 is supposed to be at I2C Address
|
|
* 0x4c and have a chip ID of 0x01. G781-1 is supposed to be at I2C
|
|
* address 0x4d and have a chip ID of 0x03. However, when support
|
|
* for G781 was added, chips at 0x4c and 0x4d were found to have a
|
|
* chip ID of 0x01. A G781-1 at I2C address 0x4d was now found with
|
|
* chip ID 0x03.
|
|
* To avoid detection failures, accept chip ID 0x01 and 0x03 at both
|
|
* addresses.
|
|
* G784 reports manufacturer ID 0x47 and chip ID 0x01. A public
|
|
* datasheet is not available. Extensive testing suggests that
|
|
* the chip appears to be fully compatible with G781.
|
|
* Available register dumps show that G751 also reports manufacturer
|
|
* ID 0x47 and chip ID 0x01 even though that chip does not officially
|
|
* support those registers. This makes chip detection somewhat
|
|
* vulnerable. To improve detection quality, read the offset low byte
|
|
* and alert fault queue registers and verify that only expected bits
|
|
* are set.
|
|
*/
|
|
if ((chip_id == 0x01 || chip_id == 0x03) &&
|
|
(address == 0x4c || address == 0x4d) &&
|
|
!(config1 & 0x3f) && convrate <= 0x08) {
|
|
int reg;
|
|
|
|
reg = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_OFFSL);
|
|
if (reg < 0 || reg & 0x1f)
|
|
return NULL;
|
|
reg = i2c_smbus_read_byte_data(client, TMP451_REG_CONALERT);
|
|
if (reg < 0 || reg & 0xf1)
|
|
return NULL;
|
|
|
|
return "g781";
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const char *lm90_detect_ti49(struct i2c_client *client, bool common_address,
|
|
int chip_id, int config1, int convrate)
|
|
{
|
|
if (common_address && chip_id == 0x00 && !(config1 & 0x3f) && !(convrate & 0xf8)) {
|
|
/* THMC10: Unsupported registers return 0xff */
|
|
if (i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL) == 0xff &&
|
|
i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_CRIT) == 0xff)
|
|
return "thmc10";
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static const char *lm90_detect_ti(struct i2c_client *client, int chip_id,
|
|
int config1, int convrate)
|
|
{
|
|
int address = client->addr;
|
|
const char *name = NULL;
|
|
|
|
if (chip_id == 0x00 && !(config1 & 0x1b) && convrate <= 0x09) {
|
|
int local_ext, conalert, chen, dfc;
|
|
|
|
local_ext = i2c_smbus_read_byte_data(client,
|
|
TMP451_REG_LOCAL_TEMPL);
|
|
conalert = i2c_smbus_read_byte_data(client,
|
|
TMP451_REG_CONALERT);
|
|
chen = i2c_smbus_read_byte_data(client, TMP461_REG_CHEN);
|
|
dfc = i2c_smbus_read_byte_data(client, TMP461_REG_DFC);
|
|
|
|
if (!(local_ext & 0x0f) && (conalert & 0xf1) == 0x01 &&
|
|
(chen & 0xfc) == 0x00 && (dfc & 0xfc) == 0x00) {
|
|
if (address == 0x4c && !(chen & 0x03))
|
|
name = "tmp451";
|
|
else if (address >= 0x48 && address <= 0x4f)
|
|
name = "tmp461";
|
|
}
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int lm90_detect(struct i2c_client *client, struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
int man_id, chip_id, config1, convrate, lhigh;
|
|
const char *name = NULL;
|
|
int address = client->addr;
|
|
bool common_address =
|
|
(address >= 0x18 && address <= 0x1a) ||
|
|
(address >= 0x29 && address <= 0x2b) ||
|
|
(address >= 0x4c && address <= 0x4e);
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Get well defined register value for chips with neither man_id nor
|
|
* chip_id registers.
|
|
*/
|
|
lhigh = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_HIGH);
|
|
|
|
/* detection and identification */
|
|
man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID);
|
|
chip_id = i2c_smbus_read_byte_data(client, LM90_REG_CHIP_ID);
|
|
config1 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG1);
|
|
convrate = i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE);
|
|
if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0 || lhigh < 0)
|
|
return -ENODEV;
|
|
|
|
/* Bail out immediately if all register report the same value */
|
|
if (lhigh == man_id && lhigh == chip_id && lhigh == config1 && lhigh == convrate)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* If reading man_id and chip_id both return the same value as lhigh,
|
|
* the chip may not support those registers and return the most recent read
|
|
* value. Check again with a different register and handle accordingly.
|
|
*/
|
|
if (man_id == lhigh && chip_id == lhigh) {
|
|
convrate = i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE);
|
|
man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID);
|
|
chip_id = i2c_smbus_read_byte_data(client, LM90_REG_CHIP_ID);
|
|
if (convrate < 0 || man_id < 0 || chip_id < 0)
|
|
return -ENODEV;
|
|
if (man_id == convrate && chip_id == convrate)
|
|
man_id = -1;
|
|
}
|
|
switch (man_id) {
|
|
case -1: /* Chip does not support man_id / chip_id */
|
|
if (common_address && !convrate && !(config1 & 0x7f))
|
|
name = lm90_detect_lm84(client);
|
|
break;
|
|
case 0x01: /* National Semiconductor */
|
|
name = lm90_detect_national(client, chip_id, config1, convrate);
|
|
break;
|
|
case 0x1a: /* ON */
|
|
name = lm90_detect_on(client, chip_id, config1, convrate);
|
|
break;
|
|
case 0x23: /* Genesys Logic */
|
|
if (common_address && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "gl523sm";
|
|
break;
|
|
case 0x41: /* Analog Devices */
|
|
name = lm90_detect_analog(client, common_address, chip_id, config1,
|
|
convrate);
|
|
break;
|
|
case 0x47: /* GMT */
|
|
name = lm90_detect_gmt(client, chip_id, config1, convrate);
|
|
break;
|
|
case 0x49: /* TI */
|
|
name = lm90_detect_ti49(client, common_address, chip_id, config1, convrate);
|
|
break;
|
|
case 0x4d: /* Maxim Integrated */
|
|
name = lm90_detect_maxim(client, common_address, chip_id,
|
|
config1, convrate);
|
|
break;
|
|
case 0x54: /* ON MC1066, Microchip TC1068, TCM1617 (originally TelCom) */
|
|
if (common_address && !(config1 & 0x3f) && !(convrate & 0xf8))
|
|
name = "mc1066";
|
|
break;
|
|
case 0x55: /* TI */
|
|
name = lm90_detect_ti(client, chip_id, config1, convrate);
|
|
break;
|
|
case 0x5c: /* Winbond/Nuvoton */
|
|
name = lm90_detect_nuvoton(client, chip_id, config1, convrate);
|
|
break;
|
|
case 0xa1: /* NXP Semiconductor/Philips */
|
|
name = lm90_detect_nxp(client, common_address, chip_id, config1, convrate);
|
|
break;
|
|
case 0xff: /* MAX1617, G767, NE1617 */
|
|
if (common_address && chip_id == 0xff && convrate < 8)
|
|
name = lm90_detect_max1617(client, config1);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!name) { /* identification failed */
|
|
dev_dbg(&adapter->dev,
|
|
"Unsupported chip at 0x%02x (man_id=0x%02X, chip_id=0x%02X)\n",
|
|
client->addr, man_id, chip_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
strscpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lm90_restore_conf(void *_data)
|
|
{
|
|
struct lm90_data *data = _data;
|
|
struct i2c_client *client = data->client;
|
|
|
|
cancel_delayed_work_sync(&data->alert_work);
|
|
cancel_work_sync(&data->report_work);
|
|
|
|
/* Restore initial configuration */
|
|
if (data->flags & LM90_HAVE_CONVRATE)
|
|
lm90_write_convrate(data, data->convrate_orig);
|
|
lm90_write_reg(client, LM90_REG_CONFIG1, data->config_orig);
|
|
}
|
|
|
|
static int lm90_init_client(struct i2c_client *client, struct lm90_data *data)
|
|
{
|
|
struct device_node *np = client->dev.of_node;
|
|
int config, convrate;
|
|
|
|
if (data->flags & LM90_HAVE_CONVRATE) {
|
|
convrate = lm90_read_reg(client, LM90_REG_CONVRATE);
|
|
if (convrate < 0)
|
|
return convrate;
|
|
data->convrate_orig = convrate;
|
|
lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
|
|
} else {
|
|
data->update_interval = 500;
|
|
}
|
|
|
|
/*
|
|
* Start the conversions.
|
|
*/
|
|
config = lm90_read_reg(client, LM90_REG_CONFIG1);
|
|
if (config < 0)
|
|
return config;
|
|
data->config_orig = config;
|
|
data->config = config;
|
|
|
|
/* Check Temperature Range Select */
|
|
if (data->flags & LM90_HAVE_EXTENDED_TEMP) {
|
|
if (of_property_read_bool(np, "ti,extended-range-enable"))
|
|
config |= 0x04;
|
|
if (!(config & 0x04))
|
|
data->flags &= ~LM90_HAVE_EXTENDED_TEMP;
|
|
}
|
|
|
|
/*
|
|
* Put MAX6680/MAX8881 into extended resolution (bit 0x10,
|
|
* 0.125 degree resolution) and range (0x08, extend range
|
|
* to -64 degree) mode for the remote temperature sensor.
|
|
* Note that expeciments with an actual chip do not show a difference
|
|
* if bit 3 is set or not.
|
|
*/
|
|
if (data->kind == max6680)
|
|
config |= 0x18;
|
|
|
|
/*
|
|
* Put MAX6654 into extended range (0x20, extend minimum range from
|
|
* 0 degrees to -64 degrees). Note that extended resolution is not
|
|
* possible on the MAX6654 unless conversion rate is set to 1 Hz or
|
|
* slower, which is intentionally not done by default.
|
|
*/
|
|
if (data->kind == max6654)
|
|
config |= 0x20;
|
|
|
|
/*
|
|
* Select external channel 0 for devices with three sensors
|
|
*/
|
|
if (data->flags & LM90_HAVE_TEMP3)
|
|
config &= ~0x08;
|
|
|
|
/*
|
|
* Interrupt is enabled by default on reset, but it may be disabled
|
|
* by bootloader, unmask it.
|
|
*/
|
|
if (client->irq)
|
|
config &= ~0x80;
|
|
|
|
config &= 0xBF; /* run */
|
|
lm90_update_confreg(data, config);
|
|
|
|
return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data);
|
|
}
|
|
|
|
static bool lm90_is_tripped(struct i2c_client *client)
|
|
{
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
int ret;
|
|
|
|
ret = lm90_update_alarms(data, true);
|
|
if (ret < 0)
|
|
return false;
|
|
|
|
return !!data->current_alarms;
|
|
}
|
|
|
|
static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
|
|
{
|
|
struct i2c_client *client = dev_id;
|
|
|
|
if (lm90_is_tripped(client))
|
|
return IRQ_HANDLED;
|
|
else
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static void lm90_remove_pec(void *dev)
|
|
{
|
|
device_remove_file(dev, &dev_attr_pec);
|
|
}
|
|
|
|
static int lm90_probe_channel_from_dt(struct i2c_client *client,
|
|
struct device_node *child,
|
|
struct lm90_data *data)
|
|
{
|
|
u32 id;
|
|
s32 val;
|
|
int err;
|
|
struct device *dev = &client->dev;
|
|
|
|
err = of_property_read_u32(child, "reg", &id);
|
|
if (err) {
|
|
dev_err(dev, "missing reg property of %pOFn\n", child);
|
|
return err;
|
|
}
|
|
|
|
if (id >= MAX_CHANNELS) {
|
|
dev_err(dev, "invalid reg property value %d in %pOFn\n", id, child);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = of_property_read_string(child, "label", &data->channel_label[id]);
|
|
if (err == -ENODATA || err == -EILSEQ) {
|
|
dev_err(dev, "invalid label property in %pOFn\n", child);
|
|
return err;
|
|
}
|
|
|
|
if (data->channel_label[id])
|
|
data->channel_config[id] |= HWMON_T_LABEL;
|
|
|
|
err = of_property_read_s32(child, "temperature-offset-millicelsius", &val);
|
|
if (!err) {
|
|
if (id == 0) {
|
|
dev_err(dev, "temperature-offset-millicelsius can't be set for internal channel\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = lm90_set_temp_offset(data, lm90_temp_offset_index[id], id, val);
|
|
if (err) {
|
|
dev_err(dev, "can't set temperature offset %d for channel %d (%d)\n",
|
|
val, id, err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_parse_dt_channel_info(struct i2c_client *client,
|
|
struct lm90_data *data)
|
|
{
|
|
int err;
|
|
struct device_node *child;
|
|
struct device *dev = &client->dev;
|
|
const struct device_node *np = dev->of_node;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
if (strcmp(child->name, "channel"))
|
|
continue;
|
|
|
|
err = lm90_probe_channel_from_dt(client, child, data);
|
|
if (err) {
|
|
of_node_put(child);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hwmon_ops lm90_ops = {
|
|
.is_visible = lm90_is_visible,
|
|
.read = lm90_read,
|
|
.read_string = lm90_read_string,
|
|
.write = lm90_write,
|
|
};
|
|
|
|
static int lm90_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
struct hwmon_channel_info *info;
|
|
struct device *hwmon_dev;
|
|
struct lm90_data *data;
|
|
int err;
|
|
|
|
err = devm_regulator_get_enable(dev, "vcc");
|
|
if (err)
|
|
return dev_err_probe(dev, err, "Failed to enable regulator\n");
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->client = client;
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
INIT_DELAYED_WORK(&data->alert_work, lm90_alert_work);
|
|
INIT_WORK(&data->report_work, lm90_report_alarms);
|
|
|
|
/* Set the device type */
|
|
if (client->dev.of_node)
|
|
data->kind = (enum chips)of_device_get_match_data(&client->dev);
|
|
else
|
|
data->kind = i2c_match_id(lm90_id, client)->driver_data;
|
|
|
|
/*
|
|
* Different devices have different alarm bits triggering the
|
|
* ALERT# output
|
|
*/
|
|
data->alert_alarms = lm90_params[data->kind].alert_alarms;
|
|
data->resolution = lm90_params[data->kind].resolution ? : 11;
|
|
|
|
/* Set chip capabilities */
|
|
data->flags = lm90_params[data->kind].flags;
|
|
|
|
if ((data->flags & (LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC)) &&
|
|
!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_PEC))
|
|
data->flags &= ~(LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC);
|
|
|
|
if ((data->flags & LM90_HAVE_PARTIAL_PEC) &&
|
|
!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
|
|
data->flags &= ~LM90_HAVE_PARTIAL_PEC;
|
|
|
|
data->chip.ops = &lm90_ops;
|
|
data->chip.info = data->info;
|
|
|
|
data->info[0] = &data->chip_info;
|
|
info = &data->chip_info;
|
|
info->type = hwmon_chip;
|
|
info->config = data->chip_config;
|
|
|
|
data->chip_config[0] = HWMON_C_REGISTER_TZ;
|
|
if (data->flags & LM90_HAVE_ALARMS)
|
|
data->chip_config[0] |= HWMON_C_ALARMS;
|
|
if (data->flags & LM90_HAVE_CONVRATE)
|
|
data->chip_config[0] |= HWMON_C_UPDATE_INTERVAL;
|
|
if (data->flags & LM90_HAVE_FAULTQUEUE)
|
|
data->chip_config[0] |= HWMON_C_TEMP_SAMPLES;
|
|
data->info[1] = &data->temp_info;
|
|
|
|
info = &data->temp_info;
|
|
info->type = hwmon_temp;
|
|
info->config = data->channel_config;
|
|
|
|
data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MAX |
|
|
HWMON_T_MAX_ALARM;
|
|
data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MAX |
|
|
HWMON_T_MAX_ALARM | HWMON_T_FAULT;
|
|
|
|
if (data->flags & LM90_HAVE_LOW) {
|
|
data->channel_config[0] |= HWMON_T_MIN | HWMON_T_MIN_ALARM;
|
|
data->channel_config[1] |= HWMON_T_MIN | HWMON_T_MIN_ALARM;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_CRIT) {
|
|
data->channel_config[0] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST;
|
|
data->channel_config[1] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_OFFSET)
|
|
data->channel_config[1] |= HWMON_T_OFFSET;
|
|
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
data->channel_config[0] |= HWMON_T_EMERGENCY |
|
|
HWMON_T_EMERGENCY_HYST;
|
|
data->channel_config[1] |= HWMON_T_EMERGENCY |
|
|
HWMON_T_EMERGENCY_HYST;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
|
|
data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM;
|
|
data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_TEMP3) {
|
|
data->channel_config[2] = HWMON_T_INPUT |
|
|
HWMON_T_MIN | HWMON_T_MAX |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST |
|
|
HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_FAULT;
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
data->channel_config[2] |= HWMON_T_EMERGENCY |
|
|
HWMON_T_EMERGENCY_HYST;
|
|
}
|
|
if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
|
|
data->channel_config[2] |= HWMON_T_EMERGENCY_ALARM;
|
|
if (data->flags & LM90_HAVE_OFFSET)
|
|
data->channel_config[2] |= HWMON_T_OFFSET;
|
|
}
|
|
|
|
data->faultqueue_mask = lm90_params[data->kind].faultqueue_mask;
|
|
data->faultqueue_depth = lm90_params[data->kind].faultqueue_depth;
|
|
data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
|
|
if (data->flags & LM90_HAVE_REMOTE_EXT)
|
|
data->reg_remote_ext = LM90_REG_REMOTE_TEMPL;
|
|
data->reg_status2 = lm90_params[data->kind].reg_status2;
|
|
|
|
/* Set maximum conversion rate */
|
|
data->max_convrate = lm90_params[data->kind].max_convrate;
|
|
|
|
/* Parse device-tree channel information */
|
|
if (client->dev.of_node) {
|
|
err = lm90_parse_dt_channel_info(client, data);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* Initialize the LM90 chip */
|
|
err = lm90_init_client(client, data);
|
|
if (err < 0) {
|
|
dev_err(dev, "Failed to initialize device\n");
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* The 'pec' attribute is attached to the i2c device and thus created
|
|
* separately.
|
|
*/
|
|
if (data->flags & (LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC)) {
|
|
err = device_create_file(dev, &dev_attr_pec);
|
|
if (err)
|
|
return err;
|
|
err = devm_add_action_or_reset(dev, lm90_remove_pec, dev);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
|
|
data, &data->chip,
|
|
NULL);
|
|
if (IS_ERR(hwmon_dev))
|
|
return PTR_ERR(hwmon_dev);
|
|
|
|
data->hwmon_dev = hwmon_dev;
|
|
|
|
if (client->irq) {
|
|
dev_dbg(dev, "IRQ: %d\n", client->irq);
|
|
err = devm_request_threaded_irq(dev, client->irq,
|
|
NULL, lm90_irq_thread,
|
|
IRQF_ONESHOT, "lm90", client);
|
|
if (err < 0) {
|
|
dev_err(dev, "cannot request IRQ %d\n", client->irq);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type,
|
|
unsigned int flag)
|
|
{
|
|
if (type != I2C_PROTOCOL_SMBUS_ALERT)
|
|
return;
|
|
|
|
if (lm90_is_tripped(client)) {
|
|
/*
|
|
* Disable ALERT# output, because these chips don't implement
|
|
* SMBus alert correctly; they should only hold the alert line
|
|
* low briefly.
|
|
*/
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
|
|
if ((data->flags & LM90_HAVE_BROKEN_ALERT) &&
|
|
(data->current_alarms & data->alert_alarms)) {
|
|
if (!(data->config & 0x80)) {
|
|
dev_dbg(&client->dev, "Disabling ALERT#\n");
|
|
lm90_update_confreg(data, data->config | 0x80);
|
|
}
|
|
schedule_delayed_work(&data->alert_work,
|
|
max_t(int, HZ, msecs_to_jiffies(data->update_interval)));
|
|
}
|
|
} else {
|
|
dev_dbg(&client->dev, "Everything OK\n");
|
|
}
|
|
}
|
|
|
|
static int lm90_suspend(struct device *dev)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
|
|
if (client->irq)
|
|
disable_irq(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lm90_resume(struct device *dev)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
|
|
if (client->irq)
|
|
enable_irq(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static DEFINE_SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume);
|
|
|
|
static struct i2c_driver lm90_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "lm90",
|
|
.of_match_table = of_match_ptr(lm90_of_match),
|
|
.pm = pm_sleep_ptr(&lm90_pm_ops),
|
|
},
|
|
.probe_new = lm90_probe,
|
|
.alert = lm90_alert,
|
|
.id_table = lm90_id,
|
|
.detect = lm90_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(lm90_driver);
|
|
|
|
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
|
|
MODULE_DESCRIPTION("LM90/ADM1032 driver");
|
|
MODULE_LICENSE("GPL");
|