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![Javier Martinez Canillas](/assets/img/avatar_default.png)
The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. This is working on the assumption that a I2C device registered via OF will always match a legacy I2C device ID and that the MODALIAS reported will always be of the form i2c:<device>. But this could change in the future so the correct approach is to have an OF device ID table if the devices are registered via OF. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1929 lines
51 KiB
C
1929 lines
51 KiB
C
/*
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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 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 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 from Texas Instruments. This device is
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* supported in both compatibility and extended mode. It's mostly compatible
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* with ADT7461 except for local temperature low byte register and max
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* conversion rate.
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/sysfs.h>
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#include <linux/interrupt.h>
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#include <linux/regulator/consumer.h>
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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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* MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
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* 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 { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
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max6646, w83l771, max6696, sa56004, g781, tmp451 };
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/*
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* The LM90 registers
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*/
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#define LM90_REG_R_MAN_ID 0xFE
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#define LM90_REG_R_CHIP_ID 0xFF
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#define LM90_REG_R_CONFIG1 0x03
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#define LM90_REG_W_CONFIG1 0x09
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#define LM90_REG_R_CONFIG2 0xBF
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#define LM90_REG_W_CONFIG2 0xBF
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#define LM90_REG_R_CONVRATE 0x04
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#define LM90_REG_W_CONVRATE 0x0A
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#define LM90_REG_R_STATUS 0x02
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#define LM90_REG_R_LOCAL_TEMP 0x00
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#define LM90_REG_R_LOCAL_HIGH 0x05
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#define LM90_REG_W_LOCAL_HIGH 0x0B
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#define LM90_REG_R_LOCAL_LOW 0x06
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#define LM90_REG_W_LOCAL_LOW 0x0C
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#define LM90_REG_R_LOCAL_CRIT 0x20
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#define LM90_REG_W_LOCAL_CRIT 0x20
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#define LM90_REG_R_REMOTE_TEMPH 0x01
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#define LM90_REG_R_REMOTE_TEMPL 0x10
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#define LM90_REG_R_REMOTE_OFFSH 0x11
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#define LM90_REG_W_REMOTE_OFFSH 0x11
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#define LM90_REG_R_REMOTE_OFFSL 0x12
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#define LM90_REG_W_REMOTE_OFFSL 0x12
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#define LM90_REG_R_REMOTE_HIGHH 0x07
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#define LM90_REG_W_REMOTE_HIGHH 0x0D
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#define LM90_REG_R_REMOTE_HIGHL 0x13
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#define LM90_REG_W_REMOTE_HIGHL 0x13
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#define LM90_REG_R_REMOTE_LOWH 0x08
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#define LM90_REG_W_REMOTE_LOWH 0x0E
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#define LM90_REG_R_REMOTE_LOWL 0x14
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#define LM90_REG_W_REMOTE_LOWL 0x14
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#define LM90_REG_R_REMOTE_CRIT 0x19
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#define LM90_REG_W_REMOTE_CRIT 0x19
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#define LM90_REG_R_TCRIT_HYST 0x21
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#define LM90_REG_W_TCRIT_HYST 0x21
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/* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
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#define MAX6657_REG_R_LOCAL_TEMPL 0x11
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#define MAX6696_REG_R_STATUS2 0x12
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#define MAX6659_REG_R_REMOTE_EMERG 0x16
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#define MAX6659_REG_W_REMOTE_EMERG 0x16
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#define MAX6659_REG_R_LOCAL_EMERG 0x17
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#define MAX6659_REG_W_LOCAL_EMERG 0x17
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/* SA56004 registers */
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#define SA56004_REG_R_LOCAL_TEMPL 0x22
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#define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
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/* TMP451 registers */
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#define TMP451_REG_R_LOCAL_TEMPL 0x15
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/*
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* Device flags
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*/
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#define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
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/* Device features */
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#define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
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#define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
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#define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
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#define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
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#define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
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#define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
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/* LM90 status */
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#define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
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#define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
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#define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */
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#define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
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#define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
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#define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
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#define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
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#define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */
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#define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */
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#define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */
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#define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */
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#define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */
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#define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */
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#define MAX6696_STATUS2_LOT2 (1 << 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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{ "adm1032", adm1032 },
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{ "adt7461", adt7461 },
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{ "adt7461a", adt7461 },
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{ "g781", g781 },
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{ "lm90", lm90 },
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{ "lm86", lm86 },
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{ "lm89", lm86 },
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{ "lm99", lm99 },
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{ "max6646", max6646 },
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{ "max6647", max6646 },
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{ "max6649", max6646 },
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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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{ "max6695", max6696 },
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{ "max6696", max6696 },
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{ "nct1008", adt7461 },
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{ "w83l771", w83l771 },
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{ "sa56004", sa56004 },
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{ "tmp451", tmp451 },
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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 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 *)adt7461
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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 *)lm86
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},
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{
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.compatible = "national,lm89",
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.data = (void *)lm86
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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,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 *)adt7461
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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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};
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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 reg_local_ext; /* Extended local temp register (optional) */
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};
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static const struct lm90_params lm90_params[] = {
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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,
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.alert_alarms = 0x7c,
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.max_convrate = 10,
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},
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[adt7461] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT,
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.alert_alarms = 0x7c,
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.max_convrate = 10,
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},
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[g781] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT,
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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},
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[lm86] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[lm90] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[lm99] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[max6646] = {
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.alert_alarms = 0x7c,
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.max_convrate = 6,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6657] = {
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6659] = {
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.flags = LM90_HAVE_EMERGENCY,
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6680] = {
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.flags = LM90_HAVE_OFFSET,
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.alert_alarms = 0x7c,
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.max_convrate = 7,
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},
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[max6696] = {
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.flags = LM90_HAVE_EMERGENCY
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| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
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.alert_alarms = 0x1c7c,
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.max_convrate = 6,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[w83l771] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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},
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[sa56004] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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.reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
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},
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[tmp451] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT,
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.alert_alarms = 0x7c,
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.max_convrate = 9,
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.reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
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},
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};
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/*
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* TEMP8 register index
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*/
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enum lm90_temp8_reg_index {
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LOCAL_LOW = 0,
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LOCAL_HIGH,
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LOCAL_CRIT,
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REMOTE_CRIT,
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LOCAL_EMERG, /* max6659 and max6695/96 */
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REMOTE_EMERG, /* max6659 and max6695/96 */
|
|
REMOTE2_CRIT, /* max6695/96 only */
|
|
REMOTE2_EMERG, /* max6695/96 only */
|
|
TEMP8_REG_NUM
|
|
};
|
|
|
|
/*
|
|
* TEMP11 register index
|
|
*/
|
|
enum lm90_temp11_reg_index {
|
|
REMOTE_TEMP = 0,
|
|
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 */
|
|
TEMP11_REG_NUM
|
|
};
|
|
|
|
/*
|
|
* Client data (each client gets its own)
|
|
*/
|
|
|
|
struct lm90_data {
|
|
struct i2c_client *client;
|
|
u32 channel_config[4];
|
|
struct hwmon_channel_info temp_info;
|
|
const struct hwmon_channel_info *info[3];
|
|
struct hwmon_chip_info chip;
|
|
struct mutex update_lock;
|
|
bool valid; /* true if register values are valid */
|
|
unsigned long last_updated; /* in jiffies */
|
|
int kind;
|
|
u32 flags;
|
|
|
|
unsigned int update_interval; /* in milliseconds */
|
|
|
|
u8 config_orig; /* Original configuration register value */
|
|
u8 convrate_orig; /* Original conversion rate register value */
|
|
u16 alert_alarms; /* Which alarm bits trigger ALERT# */
|
|
/* Upper 8 bits for max6695/96 */
|
|
u8 max_convrate; /* Maximum conversion rate */
|
|
u8 reg_local_ext; /* local extension register offset */
|
|
|
|
/* registers values */
|
|
s8 temp8[TEMP8_REG_NUM];
|
|
s16 temp11[TEMP11_REG_NUM];
|
|
u8 temp_hyst;
|
|
u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
|
|
};
|
|
|
|
/*
|
|
* Support functions
|
|
*/
|
|
|
|
/*
|
|
* The ADM1032 supports PEC but not on write byte transactions, so we need
|
|
* to explicitly ask for a transaction without PEC.
|
|
*/
|
|
static inline s32 adm1032_write_byte(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,
|
|
* 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)
|
|
{
|
|
int err;
|
|
|
|
if (client->flags & I2C_CLIENT_PEC) {
|
|
err = adm1032_write_byte(client, reg);
|
|
if (err >= 0)
|
|
err = i2c_smbus_read_byte(client);
|
|
} else
|
|
err = i2c_smbus_read_byte_data(client, reg);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl)
|
|
{
|
|
int oldh, newh, l;
|
|
|
|
/*
|
|
* There is a trick here. 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
|
|
* byte once, then the low byte, then the high byte again. If the new
|
|
* high byte matches the old one, then we have a valid reading. Else
|
|
* we have to read the low byte again, and now we believe we have a
|
|
* correct reading.
|
|
*/
|
|
oldh = lm90_read_reg(client, regh);
|
|
if (oldh < 0)
|
|
return oldh;
|
|
l = lm90_read_reg(client, regl);
|
|
if (l < 0)
|
|
return l;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 inline int lm90_select_remote_channel(struct i2c_client *client,
|
|
struct lm90_data *data,
|
|
int channel)
|
|
{
|
|
int config;
|
|
|
|
if (data->kind == max6696) {
|
|
config = lm90_read_reg(client, LM90_REG_R_CONFIG1);
|
|
if (config < 0)
|
|
return config;
|
|
config &= ~0x08;
|
|
if (channel)
|
|
config |= 0x08;
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
|
|
config);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 = i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
|
|
data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
|
|
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;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[LOCAL_CRIT] = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[REMOTE_CRIT] = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp_hyst = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_LOW] = val << 8;
|
|
|
|
if (data->flags & LM90_HAVE_REM_LIMIT_EXT) {
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_LOW] |= val;
|
|
}
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_HIGH] = val << 8;
|
|
|
|
if (data->flags & LM90_HAVE_REM_LIMIT_EXT) {
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_HIGH] |= val;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_OFFSET) {
|
|
val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH,
|
|
LM90_REG_R_REMOTE_OFFSL);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_OFFSET] = val;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[LOCAL_EMERG] = val;
|
|
|
|
val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[REMOTE_EMERG] = val;
|
|
}
|
|
|
|
if (data->kind == max6696) {
|
|
val = lm90_select_remote_channel(client, data, 1);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[REMOTE2_CRIT] = val;
|
|
|
|
val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[REMOTE2_EMERG] = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE2_LOW] = val << 8;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE2_HIGH] = val << 8;
|
|
|
|
lm90_select_remote_channel(client, data, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_R_LOCAL_LOW);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[LOCAL_LOW] = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp8[LOCAL_HIGH] = val;
|
|
|
|
if (data->reg_local_ext) {
|
|
val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
|
|
data->reg_local_ext);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[LOCAL_TEMP] = val;
|
|
} else {
|
|
val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[LOCAL_TEMP] = val << 8;
|
|
}
|
|
val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
|
|
LM90_REG_R_REMOTE_TEMPL);
|
|
if (val < 0)
|
|
return val;
|
|
data->temp11[REMOTE_TEMP] = val;
|
|
|
|
val = lm90_read_reg(client, LM90_REG_R_STATUS);
|
|
if (val < 0)
|
|
return val;
|
|
data->alarms = val; /* lower 8 bit of alarms */
|
|
|
|
if (data->kind == max6696) {
|
|
val = lm90_select_remote_channel(client, data, 1);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
|
|
LM90_REG_R_REMOTE_TEMPL);
|
|
if (val < 0) {
|
|
lm90_select_remote_channel(client, data, 0);
|
|
return val;
|
|
}
|
|
data->temp11[REMOTE2_TEMP] = val;
|
|
|
|
lm90_select_remote_channel(client, data, 0);
|
|
|
|
val = lm90_read_reg(client, MAX6696_REG_R_STATUS2);
|
|
if (val < 0)
|
|
return val;
|
|
data->alarms |= val << 8;
|
|
}
|
|
|
|
/*
|
|
* Re-enable ALERT# output if it was originally enabled and
|
|
* relevant alarms are all clear
|
|
*/
|
|
if (!(data->config_orig & 0x80) &&
|
|
!(data->alarms & data->alert_alarms)) {
|
|
val = lm90_read_reg(client, LM90_REG_R_CONFIG1);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & 0x80) {
|
|
dev_dbg(&client->dev, "Re-enabling ALERT#\n");
|
|
i2c_smbus_write_byte_data(client,
|
|
LM90_REG_W_CONFIG1,
|
|
val & ~0x80);
|
|
}
|
|
}
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Conversions
|
|
* For local temperatures and limits, critical limits and the hysteresis
|
|
* value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
|
|
* For remote temperatures and limits, it uses signed 11-bit values with
|
|
* LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
|
|
* Maxim chips use unsigned values.
|
|
*/
|
|
|
|
static inline int temp_from_s8(s8 val)
|
|
{
|
|
return val * 1000;
|
|
}
|
|
|
|
static inline int temp_from_u8(u8 val)
|
|
{
|
|
return val * 1000;
|
|
}
|
|
|
|
static inline int temp_from_s16(s16 val)
|
|
{
|
|
return val / 32 * 125;
|
|
}
|
|
|
|
static inline int temp_from_u16(u16 val)
|
|
{
|
|
return val / 32 * 125;
|
|
}
|
|
|
|
static s8 temp_to_s8(long val)
|
|
{
|
|
if (val <= -128000)
|
|
return -128;
|
|
if (val >= 127000)
|
|
return 127;
|
|
if (val < 0)
|
|
return (val - 500) / 1000;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
static u8 temp_to_u8(long val)
|
|
{
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 255000)
|
|
return 255;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
static s16 temp_to_s16(long val)
|
|
{
|
|
if (val <= -128000)
|
|
return 0x8000;
|
|
if (val >= 127875)
|
|
return 0x7FE0;
|
|
if (val < 0)
|
|
return (val - 62) / 125 * 32;
|
|
return (val + 62) / 125 * 32;
|
|
}
|
|
|
|
static u8 hyst_to_reg(long val)
|
|
{
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 30500)
|
|
return 31;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
/*
|
|
* ADT7461 in compatibility mode is almost identical to LM90 except that
|
|
* attempts to write values that are outside the range 0 < temp < 127 are
|
|
* treated as the boundary value.
|
|
*
|
|
* ADT7461 in "extended mode" operation uses unsigned integers offset by
|
|
* 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
|
|
*/
|
|
static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT)
|
|
return (val - 64) * 1000;
|
|
return temp_from_s8(val);
|
|
}
|
|
|
|
static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT)
|
|
return (val - 0x4000) / 64 * 250;
|
|
return temp_from_s16(val);
|
|
}
|
|
|
|
static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT) {
|
|
if (val <= -64000)
|
|
return 0;
|
|
if (val >= 191000)
|
|
return 0xFF;
|
|
return (val + 500 + 64000) / 1000;
|
|
}
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 127000)
|
|
return 127;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT) {
|
|
if (val <= -64000)
|
|
return 0;
|
|
if (val >= 191750)
|
|
return 0xFFC0;
|
|
return (val + 64000 + 125) / 250 * 64;
|
|
}
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 127750)
|
|
return 0x7FC0;
|
|
return (val + 125) / 250 * 64;
|
|
}
|
|
|
|
/* pec used for ADM1032 only */
|
|
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_get_temp11(struct lm90_data *data, int index)
|
|
{
|
|
s16 temp11 = data->temp11[index];
|
|
int temp;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
temp = temp_from_u16_adt7461(data, temp11);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u16(temp11);
|
|
else
|
|
temp = temp_from_s16(temp11);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index <= 2)
|
|
temp += 16000;
|
|
|
|
return temp;
|
|
}
|
|
|
|
static int lm90_set_temp11(struct lm90_data *data, int index, long val)
|
|
{
|
|
static struct reg {
|
|
u8 high;
|
|
u8 low;
|
|
} reg[] = {
|
|
[REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL },
|
|
[REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL },
|
|
[REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL },
|
|
[REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL },
|
|
[REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }
|
|
};
|
|
struct i2c_client *client = data->client;
|
|
struct reg *regp = ®[index];
|
|
int err;
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index <= 2)
|
|
val -= 16000;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
data->temp11[index] = temp_to_u16_adt7461(data, val);
|
|
else if (data->kind == max6646)
|
|
data->temp11[index] = temp_to_u8(val) << 8;
|
|
else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
data->temp11[index] = temp_to_s16(val);
|
|
else
|
|
data->temp11[index] = temp_to_s8(val) << 8;
|
|
|
|
lm90_select_remote_channel(client, data, index >= 3);
|
|
err = i2c_smbus_write_byte_data(client, regp->high,
|
|
data->temp11[index] >> 8);
|
|
if (err < 0)
|
|
return err;
|
|
if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
err = i2c_smbus_write_byte_data(client, regp->low,
|
|
data->temp11[index] & 0xff);
|
|
|
|
lm90_select_remote_channel(client, data, 0);
|
|
return err;
|
|
}
|
|
|
|
static int lm90_get_temp8(struct lm90_data *data, int index)
|
|
{
|
|
s8 temp8 = data->temp8[index];
|
|
int temp;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
temp = temp_from_u8_adt7461(data, temp8);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(temp8);
|
|
else
|
|
temp = temp_from_s8(temp8);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index == 3)
|
|
temp += 16000;
|
|
|
|
return temp;
|
|
}
|
|
|
|
static int lm90_set_temp8(struct lm90_data *data, int index, long val)
|
|
{
|
|
static const u8 reg[TEMP8_REG_NUM] = {
|
|
LM90_REG_W_LOCAL_LOW,
|
|
LM90_REG_W_LOCAL_HIGH,
|
|
LM90_REG_W_LOCAL_CRIT,
|
|
LM90_REG_W_REMOTE_CRIT,
|
|
MAX6659_REG_W_LOCAL_EMERG,
|
|
MAX6659_REG_W_REMOTE_EMERG,
|
|
LM90_REG_W_REMOTE_CRIT,
|
|
MAX6659_REG_W_REMOTE_EMERG,
|
|
};
|
|
struct i2c_client *client = data->client;
|
|
int err;
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index == 3)
|
|
val -= 16000;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
data->temp8[index] = temp_to_u8_adt7461(data, val);
|
|
else if (data->kind == max6646)
|
|
data->temp8[index] = temp_to_u8(val);
|
|
else
|
|
data->temp8[index] = temp_to_s8(val);
|
|
|
|
lm90_select_remote_channel(client, data, index >= 6);
|
|
err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]);
|
|
lm90_select_remote_channel(client, data, 0);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lm90_get_temphyst(struct lm90_data *data, int index)
|
|
{
|
|
int temp;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
temp = temp_from_u8_adt7461(data, data->temp8[index]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(data->temp8[index]);
|
|
else
|
|
temp = temp_from_s8(data->temp8[index]);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index == 3)
|
|
temp += 16000;
|
|
|
|
return temp - temp_from_s8(data->temp_hyst);
|
|
}
|
|
|
|
static int lm90_set_temphyst(struct lm90_data *data, long val)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
int temp;
|
|
int err;
|
|
|
|
if (data->kind == adt7461 || data->kind == tmp451)
|
|
temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
|
|
else
|
|
temp = temp_from_s8(data->temp8[LOCAL_CRIT]);
|
|
|
|
data->temp_hyst = hyst_to_reg(temp - val);
|
|
err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
|
|
data->temp_hyst);
|
|
return err;
|
|
}
|
|
|
|
static const u8 lm90_temp_index[3] = {
|
|
LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP
|
|
};
|
|
|
|
static const u8 lm90_temp_min_index[3] = {
|
|
LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW
|
|
};
|
|
|
|
static const u8 lm90_temp_max_index[3] = {
|
|
LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH
|
|
};
|
|
|
|
static const u8 lm90_temp_crit_index[3] = {
|
|
LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT
|
|
};
|
|
|
|
static const u8 lm90_temp_emerg_index[3] = {
|
|
LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG
|
|
};
|
|
|
|
static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 };
|
|
static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 };
|
|
static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 };
|
|
static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 };
|
|
static const u8 lm90_fault_bits[3] = { 0, 2, 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;
|
|
|
|
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_temp11(data, lm90_temp_index[channel]);
|
|
break;
|
|
case hwmon_temp_min_alarm:
|
|
*val = (data->alarms >> lm90_min_alarm_bits[channel]) & 1;
|
|
break;
|
|
case hwmon_temp_max_alarm:
|
|
*val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1;
|
|
break;
|
|
case hwmon_temp_crit_alarm:
|
|
*val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1;
|
|
break;
|
|
case hwmon_temp_emergency_alarm:
|
|
*val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1;
|
|
break;
|
|
case hwmon_temp_fault:
|
|
*val = (data->alarms >> lm90_fault_bits[channel]) & 1;
|
|
break;
|
|
case hwmon_temp_min:
|
|
if (channel == 0)
|
|
*val = lm90_get_temp8(data,
|
|
lm90_temp_min_index[channel]);
|
|
else
|
|
*val = lm90_get_temp11(data,
|
|
lm90_temp_min_index[channel]);
|
|
break;
|
|
case hwmon_temp_max:
|
|
if (channel == 0)
|
|
*val = lm90_get_temp8(data,
|
|
lm90_temp_max_index[channel]);
|
|
else
|
|
*val = lm90_get_temp11(data,
|
|
lm90_temp_max_index[channel]);
|
|
break;
|
|
case hwmon_temp_crit:
|
|
*val = lm90_get_temp8(data, lm90_temp_crit_index[channel]);
|
|
break;
|
|
case hwmon_temp_crit_hyst:
|
|
*val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]);
|
|
break;
|
|
case hwmon_temp_emergency:
|
|
*val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]);
|
|
break;
|
|
case hwmon_temp_emergency_hyst:
|
|
*val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]);
|
|
break;
|
|
case hwmon_temp_offset:
|
|
*val = lm90_get_temp11(data, REMOTE_OFFSET);
|
|
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:
|
|
if (channel == 0)
|
|
err = lm90_set_temp8(data,
|
|
lm90_temp_min_index[channel],
|
|
val);
|
|
else
|
|
err = lm90_set_temp11(data,
|
|
lm90_temp_min_index[channel],
|
|
val);
|
|
break;
|
|
case hwmon_temp_max:
|
|
if (channel == 0)
|
|
err = lm90_set_temp8(data,
|
|
lm90_temp_max_index[channel],
|
|
val);
|
|
else
|
|
err = lm90_set_temp11(data,
|
|
lm90_temp_max_index[channel],
|
|
val);
|
|
break;
|
|
case hwmon_temp_crit:
|
|
err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val);
|
|
break;
|
|
case hwmon_temp_crit_hyst:
|
|
err = lm90_set_temphyst(data, val);
|
|
break;
|
|
case hwmon_temp_emergency:
|
|
err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val);
|
|
break;
|
|
case hwmon_temp_offset:
|
|
err = lm90_set_temp11(data, REMOTE_OFFSET, 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:
|
|
return S_IRUGO;
|
|
case hwmon_temp_min:
|
|
case hwmon_temp_max:
|
|
case hwmon_temp_crit:
|
|
case hwmon_temp_emergency:
|
|
case hwmon_temp_offset:
|
|
return S_IRUGO | S_IWUSR;
|
|
case hwmon_temp_crit_hyst:
|
|
if (channel == 0)
|
|
return S_IRUGO | S_IWUSR;
|
|
return S_IRUGO;
|
|
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;
|
|
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;
|
|
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:
|
|
return S_IRUGO | S_IWUSR;
|
|
case hwmon_chip_alarms:
|
|
return S_IRUGO;
|
|
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_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;
|
|
}
|
|
}
|
|
|
|
/* 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 address = client->addr;
|
|
const char *name = NULL;
|
|
int man_id, chip_id, config1, config2, convrate;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* detection and identification */
|
|
man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
|
|
chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
|
|
config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
|
|
convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
|
|
if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
|
|
return -ENODEV;
|
|
|
|
if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
|
|
config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
|
|
if (config2 < 0)
|
|
return -ENODEV;
|
|
} else
|
|
config2 = 0; /* Make compiler happy */
|
|
|
|
if ((address == 0x4C || address == 0x4D)
|
|
&& man_id == 0x01) { /* National Semiconductor */
|
|
if ((config1 & 0x2A) == 0x00
|
|
&& (config2 & 0xF8) == 0x00
|
|
&& convrate <= 0x09) {
|
|
if (address == 0x4C
|
|
&& (chip_id & 0xF0) == 0x20) { /* LM90 */
|
|
name = "lm90";
|
|
} else
|
|
if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
|
|
name = "lm99";
|
|
dev_info(&adapter->dev,
|
|
"Assuming LM99 chip at 0x%02x\n",
|
|
address);
|
|
dev_info(&adapter->dev,
|
|
"If it is an LM89, instantiate it "
|
|
"with the new_device sysfs "
|
|
"interface\n");
|
|
} else
|
|
if (address == 0x4C
|
|
&& (chip_id & 0xF0) == 0x10) { /* LM86 */
|
|
name = "lm86";
|
|
}
|
|
}
|
|
} else
|
|
if ((address == 0x4C || address == 0x4D)
|
|
&& man_id == 0x41) { /* Analog Devices */
|
|
if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
|
|
&& (config1 & 0x3F) == 0x00
|
|
&& convrate <= 0x0A) {
|
|
name = "adm1032";
|
|
/*
|
|
* The ADM1032 supports PEC, but only if combined
|
|
* transactions are not used.
|
|
*/
|
|
if (i2c_check_functionality(adapter,
|
|
I2C_FUNC_SMBUS_BYTE))
|
|
info->flags |= I2C_CLIENT_PEC;
|
|
} else
|
|
if (chip_id == 0x51 /* ADT7461 */
|
|
&& (config1 & 0x1B) == 0x00
|
|
&& convrate <= 0x0A) {
|
|
name = "adt7461";
|
|
} else
|
|
if (chip_id == 0x57 /* ADT7461A, NCT1008 */
|
|
&& (config1 & 0x1B) == 0x00
|
|
&& convrate <= 0x0A) {
|
|
name = "adt7461a";
|
|
}
|
|
} else
|
|
if (man_id == 0x4D) { /* Maxim */
|
|
int emerg, emerg2, status2;
|
|
|
|
/*
|
|
* We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
|
|
* LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_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_R_REMOTE_EMERG);
|
|
man_id = i2c_smbus_read_byte_data(client,
|
|
LM90_REG_R_MAN_ID);
|
|
emerg2 = i2c_smbus_read_byte_data(client,
|
|
MAX6659_REG_R_REMOTE_EMERG);
|
|
status2 = i2c_smbus_read_byte_data(client,
|
|
MAX6696_REG_R_STATUS2);
|
|
if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* The 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. Likewise, the config1 register seems to lack a
|
|
* low nibble, so the value will be those of the previous
|
|
* read, so in our case 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 (chip_id == man_id
|
|
&& (address == 0x4C || address == 0x4D || address == 0x4E)
|
|
&& (config1 & 0x1F) == (man_id & 0x0F)
|
|
&& convrate <= 0x09) {
|
|
if (address == 0x4C)
|
|
name = "max6657";
|
|
else
|
|
name = "max6659";
|
|
} else
|
|
/*
|
|
* 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 (chip_id == 0x01
|
|
&& (config1 & 0x10) == 0x00
|
|
&& (status2 & 0x01) == 0x00
|
|
&& emerg == emerg2
|
|
&& convrate <= 0x07) {
|
|
name = "max6696";
|
|
} else
|
|
/*
|
|
* 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).
|
|
*/
|
|
if (chip_id == 0x01
|
|
&& (config1 & 0x03) == 0x00
|
|
&& convrate <= 0x07) {
|
|
name = "max6680";
|
|
} else
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (chip_id == 0x59
|
|
&& (config1 & 0x3f) == 0x00
|
|
&& convrate <= 0x07) {
|
|
name = "max6646";
|
|
}
|
|
} else
|
|
if (address == 0x4C
|
|
&& man_id == 0x5C) { /* Winbond/Nuvoton */
|
|
if ((config1 & 0x2A) == 0x00
|
|
&& (config2 & 0xF8) == 0x00) {
|
|
if (chip_id == 0x01 /* W83L771W/G */
|
|
&& convrate <= 0x09) {
|
|
name = "w83l771";
|
|
} else
|
|
if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
|
|
&& convrate <= 0x08) {
|
|
name = "w83l771";
|
|
}
|
|
}
|
|
} else
|
|
if (address >= 0x48 && address <= 0x4F
|
|
&& man_id == 0xA1) { /* NXP Semiconductor/Philips */
|
|
if (chip_id == 0x00
|
|
&& (config1 & 0x2A) == 0x00
|
|
&& (config2 & 0xFE) == 0x00
|
|
&& convrate <= 0x09) {
|
|
name = "sa56004";
|
|
}
|
|
} else
|
|
if ((address == 0x4C || address == 0x4D)
|
|
&& man_id == 0x47) { /* GMT */
|
|
if (chip_id == 0x01 /* G781 */
|
|
&& (config1 & 0x3F) == 0x00
|
|
&& convrate <= 0x08)
|
|
name = "g781";
|
|
} else
|
|
if (address == 0x4C
|
|
&& man_id == 0x55) { /* Texas Instruments */
|
|
int local_ext;
|
|
|
|
local_ext = i2c_smbus_read_byte_data(client,
|
|
TMP451_REG_R_LOCAL_TEMPL);
|
|
|
|
if (chip_id == 0x00 /* TMP451 */
|
|
&& (config1 & 0x1B) == 0x00
|
|
&& convrate <= 0x09
|
|
&& (local_ext & 0x0F) == 0x00)
|
|
name = "tmp451";
|
|
}
|
|
|
|
if (!name) { /* identification failed */
|
|
dev_dbg(&adapter->dev,
|
|
"Unsupported chip at 0x%02x (man_id=0x%02X, "
|
|
"chip_id=0x%02X)\n", address, man_id, chip_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(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;
|
|
|
|
/* Restore initial configuration */
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
|
|
data->convrate_orig);
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
|
|
data->config_orig);
|
|
}
|
|
|
|
static int lm90_init_client(struct i2c_client *client, struct lm90_data *data)
|
|
{
|
|
int config, convrate;
|
|
|
|
convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE);
|
|
if (convrate < 0)
|
|
return convrate;
|
|
data->convrate_orig = convrate;
|
|
|
|
/*
|
|
* Start the conversions.
|
|
*/
|
|
lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
|
|
config = lm90_read_reg(client, LM90_REG_R_CONFIG1);
|
|
if (config < 0)
|
|
return config;
|
|
data->config_orig = config;
|
|
|
|
/* Check Temperature Range Select */
|
|
if (data->kind == adt7461 || data->kind == tmp451) {
|
|
if (config & 0x04)
|
|
data->flags |= LM90_FLAG_ADT7461_EXT;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (data->kind == max6680)
|
|
config |= 0x18;
|
|
|
|
/*
|
|
* Select external channel 0 for max6695/96
|
|
*/
|
|
if (data->kind == max6696)
|
|
config &= ~0x08;
|
|
|
|
config &= 0xBF; /* run */
|
|
if (config != data->config_orig) /* Only write if changed */
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
|
|
|
|
return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data);
|
|
}
|
|
|
|
static bool lm90_is_tripped(struct i2c_client *client, u16 *status)
|
|
{
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
int st, st2 = 0;
|
|
|
|
st = lm90_read_reg(client, LM90_REG_R_STATUS);
|
|
if (st < 0)
|
|
return false;
|
|
|
|
if (data->kind == max6696) {
|
|
st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2);
|
|
if (st2 < 0)
|
|
return false;
|
|
}
|
|
|
|
*status = st | (st2 << 8);
|
|
|
|
if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0)
|
|
return false;
|
|
|
|
if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
|
|
(st2 & MAX6696_STATUS2_LOT2))
|
|
dev_warn(&client->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_warn(&client->dev,
|
|
"temp%d out of range, please check!\n", 2);
|
|
if (st & LM90_STATUS_ROPEN)
|
|
dev_warn(&client->dev,
|
|
"temp%d diode open, please check!\n", 2);
|
|
if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
|
|
MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
|
|
dev_warn(&client->dev,
|
|
"temp%d out of range, please check!\n", 3);
|
|
if (st2 & MAX6696_STATUS2_R2OPEN)
|
|
dev_warn(&client->dev,
|
|
"temp%d diode open, please check!\n", 3);
|
|
|
|
return true;
|
|
}
|
|
|
|
static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
|
|
{
|
|
struct i2c_client *client = dev_id;
|
|
u16 status;
|
|
|
|
if (lm90_is_tripped(client, &status))
|
|
return IRQ_HANDLED;
|
|
else
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static void lm90_remove_pec(void *dev)
|
|
{
|
|
device_remove_file(dev, &dev_attr_pec);
|
|
}
|
|
|
|
static void lm90_regulator_disable(void *regulator)
|
|
{
|
|
regulator_disable(regulator);
|
|
}
|
|
|
|
static const u32 lm90_chip_config[] = {
|
|
HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS,
|
|
0
|
|
};
|
|
|
|
static const struct hwmon_channel_info lm90_chip_info = {
|
|
.type = hwmon_chip,
|
|
.config = lm90_chip_config,
|
|
};
|
|
|
|
|
|
static const struct hwmon_ops lm90_ops = {
|
|
.is_visible = lm90_is_visible,
|
|
.read = lm90_read,
|
|
.write = lm90_write,
|
|
};
|
|
|
|
static int lm90_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
|
|
struct hwmon_channel_info *info;
|
|
struct regulator *regulator;
|
|
struct device *hwmon_dev;
|
|
struct lm90_data *data;
|
|
int err;
|
|
|
|
regulator = devm_regulator_get(dev, "vcc");
|
|
if (IS_ERR(regulator))
|
|
return PTR_ERR(regulator);
|
|
|
|
err = regulator_enable(regulator);
|
|
if (err < 0) {
|
|
dev_err(dev, "Failed to enable regulator: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator);
|
|
if (err)
|
|
return err;
|
|
|
|
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);
|
|
|
|
/* Set the device type */
|
|
if (client->dev.of_node)
|
|
data->kind = (enum chips)of_device_get_match_data(&client->dev);
|
|
else
|
|
data->kind = id->driver_data;
|
|
if (data->kind == adm1032) {
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
|
|
client->flags &= ~I2C_CLIENT_PEC;
|
|
}
|
|
|
|
/*
|
|
* Different devices have different alarm bits triggering the
|
|
* ALERT# output
|
|
*/
|
|
data->alert_alarms = lm90_params[data->kind].alert_alarms;
|
|
|
|
/* Set chip capabilities */
|
|
data->flags = lm90_params[data->kind].flags;
|
|
|
|
data->chip.ops = &lm90_ops;
|
|
data->chip.info = data->info;
|
|
|
|
data->info[0] = &lm90_chip_info;
|
|
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_MIN | HWMON_T_MAX |
|
|
HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
|
|
HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM;
|
|
data->channel_config[1] = 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_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_EMERGENCY | HWMON_T_EMERGENCY_HYST |
|
|
HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM |
|
|
HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM |
|
|
HWMON_T_FAULT;
|
|
}
|
|
|
|
data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
|
|
|
|
/* Set maximum conversion rate */
|
|
data->max_convrate = lm90_params[data->kind].max_convrate;
|
|
|
|
/* 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 (client->flags & I2C_CLIENT_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);
|
|
|
|
if (client->irq) {
|
|
dev_dbg(dev, "IRQ: %d\n", client->irq);
|
|
err = devm_request_threaded_irq(dev, client->irq,
|
|
NULL, lm90_irq_thread,
|
|
IRQF_TRIGGER_LOW | 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)
|
|
{
|
|
u16 alarms;
|
|
|
|
if (type != I2C_PROTOCOL_SMBUS_ALERT)
|
|
return;
|
|
|
|
if (lm90_is_tripped(client, &alarms)) {
|
|
/*
|
|
* 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) &&
|
|
(alarms & data->alert_alarms)) {
|
|
int config;
|
|
|
|
dev_dbg(&client->dev, "Disabling ALERT#\n");
|
|
config = lm90_read_reg(client, LM90_REG_R_CONFIG1);
|
|
if (config >= 0)
|
|
i2c_smbus_write_byte_data(client,
|
|
LM90_REG_W_CONFIG1,
|
|
config | 0x80);
|
|
}
|
|
} else {
|
|
dev_info(&client->dev, "Everything OK\n");
|
|
}
|
|
}
|
|
|
|
static struct i2c_driver lm90_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "lm90",
|
|
.of_match_table = of_match_ptr(lm90_of_match),
|
|
},
|
|
.probe = 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");
|