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![Chris Packham](/assets/img/avatar_default.png)
Convert the adm9240 driver to using regmap and add error handling. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20200924085102.15219-4-chris.packham@alliedtelesis.co.nz [groeck: Fixed context conflict against 'hwmon: use simple i2c probe function'] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
885 lines
24 KiB
C
885 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* adm9240.c Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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*
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* Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
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* Philip Edelbrock <phil@netroedge.com>
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* Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
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* Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
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* guidance from Jean Delvare
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*
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* Driver supports Analog Devices ADM9240
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* Dallas Semiconductor DS1780
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* National Semiconductor LM81
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*
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* ADM9240 is the reference, DS1780 and LM81 are register compatibles
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*
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* Voltage Six inputs are scaled by chip, VID also reported
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* Temperature Chip temperature to 0.5'C, maximum and max_hysteris
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* Fans 2 fans, low speed alarm, automatic fan clock divider
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* Alarms 16-bit map of active alarms
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* Analog Out 0..1250 mV output
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*
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* Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
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*
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* Test hardware: Intel SE440BX-2 desktop motherboard --Grant
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*
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* LM81 extended temp reading not implemented
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-vid.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/jiffies.h>
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#include <linux/regmap.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
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I2C_CLIENT_END };
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enum chips { adm9240, ds1780, lm81 };
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/* ADM9240 registers */
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#define ADM9240_REG_MAN_ID 0x3e
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#define ADM9240_REG_DIE_REV 0x3f
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#define ADM9240_REG_CONFIG 0x40
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#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
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#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
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#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
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#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
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#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
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#define ADM9240_REG_INT(nr) (0x41 + (nr))
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#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
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#define ADM9240_REG_TEMP 0x27
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#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
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#define ADM9240_REG_ANALOG_OUT 0x19
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#define ADM9240_REG_CHASSIS_CLEAR 0x46
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#define ADM9240_REG_VID_FAN_DIV 0x47
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#define ADM9240_REG_I2C_ADDR 0x48
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#define ADM9240_REG_VID4 0x49
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#define ADM9240_REG_TEMP_CONF 0x4b
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/* generalised scaling with integer rounding */
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static inline int SCALE(long val, int mul, int div)
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{
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if (val < 0)
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return (val * mul - div / 2) / div;
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else
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return (val * mul + div / 2) / div;
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}
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/* adm9240 internally scales voltage measurements */
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static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
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static inline unsigned int IN_FROM_REG(u8 reg, int n)
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{
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return SCALE(reg, nom_mv[n], 192);
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}
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static inline u8 IN_TO_REG(unsigned long val, int n)
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{
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val = clamp_val(val, 0, nom_mv[n] * 255 / 192);
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return SCALE(val, 192, nom_mv[n]);
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}
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/* temperature range: -40..125, 127 disables temperature alarm */
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static inline s8 TEMP_TO_REG(long val)
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{
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val = clamp_val(val, -40000, 127000);
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return SCALE(val, 1, 1000);
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}
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/* two fans, each with low fan speed limit */
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static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
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{
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if (!reg) /* error */
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return -1;
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if (reg == 255)
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return 0;
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return SCALE(1350000, 1, reg * div);
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}
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/* analog out 0..1250mV */
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static inline u8 AOUT_TO_REG(unsigned long val)
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{
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val = clamp_val(val, 0, 1250);
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return SCALE(val, 255, 1250);
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}
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static inline unsigned int AOUT_FROM_REG(u8 reg)
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{
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return SCALE(reg, 1250, 255);
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}
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/* per client data */
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struct adm9240_data {
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struct i2c_client *client;
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struct regmap *regmap;
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struct mutex update_lock;
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char valid;
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unsigned long last_updated_measure;
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unsigned long last_updated_config;
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u8 in[6]; /* ro in0_input */
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u8 in_max[6]; /* rw in0_max */
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u8 in_min[6]; /* rw in0_min */
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u8 fan[2]; /* ro fan1_input */
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u8 fan_min[2]; /* rw fan1_min */
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u8 fan_div[2]; /* rw fan1_div, read-only accessor */
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s16 temp; /* ro temp1_input, 9-bit sign-extended */
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s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
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u16 alarms; /* ro alarms */
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u8 aout; /* rw aout_output */
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u8 vid; /* ro vid */
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u8 vrm; /* -- vrm set on startup, no accessor */
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};
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/* write new fan div, callers must hold data->update_lock */
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static int adm9240_write_fan_div(struct adm9240_data *data, int nr,
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u8 fan_div)
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{
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unsigned int reg, old, shift = (nr + 2) * 2;
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int err;
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err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®);
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if (err < 0)
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return err;
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old = (reg >> shift) & 3;
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reg &= ~(3 << shift);
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reg |= (fan_div << shift);
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err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg);
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if (err < 0)
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return err;
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dev_dbg(&data->client->dev,
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"fan%d clock divider changed from %u to %u\n",
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nr + 1, 1 << old, 1 << fan_div);
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return 0;
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}
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static int adm9240_update_measure(struct adm9240_data *data)
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{
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unsigned int val;
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u8 regs[2];
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int err;
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int i;
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err = regmap_bulk_read(data->regmap, ADM9240_REG_IN(0), &data->in[0], 6);
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if (err < 0)
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return err;
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err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), ®s, 2);
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if (err < 0)
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return err;
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data->alarms = regs[0] | regs[1] << 8;
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/*
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* read temperature: assume temperature changes less than
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* 0.5'C per two measurement cycles thus ignore possible
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* but unlikely aliasing error on lsb reading. --Grant
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*/
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err = regmap_read(data->regmap, ADM9240_REG_TEMP, &val);
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if (err < 0)
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return err;
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data->temp = val << 8;
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err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, &val);
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if (err < 0)
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return err;
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data->temp |= val;
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err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN(0),
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&data->fan[0], 2);
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if (err < 0)
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return err;
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for (i = 0; i < 2; i++) { /* read fans */
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/* adjust fan clock divider on overflow */
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if (data->valid && data->fan[i] == 255 &&
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data->fan_div[i] < 3) {
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err = adm9240_write_fan_div(data, i,
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++data->fan_div[i]);
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if (err < 0)
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return err;
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/* adjust fan_min if active, but not to 0 */
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if (data->fan_min[i] < 255 &&
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data->fan_min[i] >= 2)
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data->fan_min[i] /= 2;
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}
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}
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return 0;
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}
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static int adm9240_update_config(struct adm9240_data *data)
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{
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unsigned int val;
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int i;
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int err;
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for (i = 0; i < 6; i++) {
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err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MIN(i),
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&data->in_min[i], 1);
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if (err < 0)
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return err;
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err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MAX(i),
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&data->in_max[i], 1);
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if (err < 0)
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return err;
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}
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err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN_MIN(0),
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&data->fan_min[0], 2);
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if (err < 0)
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return err;
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err = regmap_bulk_read(data->regmap, ADM9240_REG_TEMP_MAX(0),
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&data->temp_max[0], 2);
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if (err < 0)
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return err;
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/* read fan divs and 5-bit VID */
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err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, &val);
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if (err < 0)
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return err;
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data->fan_div[0] = (val >> 4) & 3;
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data->fan_div[1] = (val >> 6) & 3;
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data->vid = val & 0x0f;
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err = regmap_read(data->regmap, ADM9240_REG_VID4, &val);
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if (err < 0)
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return err;
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data->vid |= (val & 1) << 4;
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/* read analog out */
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err = regmap_raw_read(data->regmap, ADM9240_REG_ANALOG_OUT,
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&data->aout, 1);
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return err;
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}
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static struct adm9240_data *adm9240_update_device(struct device *dev)
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{
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struct adm9240_data *data = dev_get_drvdata(dev);
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int err;
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mutex_lock(&data->update_lock);
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/* minimum measurement cycle: 1.75 seconds */
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if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
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|| !data->valid) {
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err = adm9240_update_measure(data);
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if (err < 0) {
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data->valid = 0;
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mutex_unlock(&data->update_lock);
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return ERR_PTR(err);
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}
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data->last_updated_measure = jiffies;
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}
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/* minimum config reading cycle: 300 seconds */
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if (time_after(jiffies, data->last_updated_config + (HZ * 300))
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|| !data->valid) {
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err = adm9240_update_config(data);
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if (err < 0) {
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data->valid = 0;
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mutex_unlock(&data->update_lock);
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return ERR_PTR(err);
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}
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data->last_updated_config = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*** sysfs accessors ***/
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/* temperature */
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static ssize_t temp1_input_show(struct device *dev,
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struct device_attribute *dummy, char *buf)
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{
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struct adm9240_data *data = adm9240_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */
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}
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static ssize_t max_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
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}
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static ssize_t max_store(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = dev_get_drvdata(dev);
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_max[attr->index] = TEMP_TO_REG(val);
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err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(attr->index),
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data->temp_max[attr->index]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static DEVICE_ATTR_RO(temp1_input);
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static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0);
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static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1);
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/* voltage */
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static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
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attr->index));
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}
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static ssize_t in_min_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
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attr->index));
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}
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static ssize_t in_max_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
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attr->index));
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}
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static ssize_t in_min_store(struct device *dev,
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struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = dev_get_drvdata(dev);
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unsigned long val;
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_min[attr->index] = IN_TO_REG(val, attr->index);
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err = regmap_write(data->regmap, ADM9240_REG_IN_MIN(attr->index),
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data->in_min[attr->index]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static ssize_t in_max_store(struct device *dev,
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struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = dev_get_drvdata(dev);
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unsigned long val;
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_max[attr->index] = IN_TO_REG(val, attr->index);
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err = regmap_write(data->regmap, ADM9240_REG_IN_MAX(attr->index),
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data->in_max[attr->index]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
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static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
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static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
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static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
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static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
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static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
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static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
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static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
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static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
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static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
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static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
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static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
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static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
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static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
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static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
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static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
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static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
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static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
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/* fans */
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static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
|
|
1 << data->fan_div[attr->index]));
|
|
}
|
|
|
|
static ssize_t fan_min_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
|
|
1 << data->fan_div[attr->index]));
|
|
}
|
|
|
|
static ssize_t fan_div_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
|
|
}
|
|
|
|
/*
|
|
* set fan speed low limit:
|
|
*
|
|
* - value is zero: disable fan speed low limit alarm
|
|
*
|
|
* - value is below fan speed measurement range: enable fan speed low
|
|
* limit alarm to be asserted while fan speed too slow to measure
|
|
*
|
|
* - otherwise: select fan clock divider to suit fan speed low limit,
|
|
* measurement code may adjust registers to ensure fan speed reading
|
|
*/
|
|
static ssize_t fan_min_store(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct adm9240_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int nr = attr->index;
|
|
u8 new_div;
|
|
unsigned long val;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (!val) {
|
|
data->fan_min[nr] = 255;
|
|
new_div = data->fan_div[nr];
|
|
|
|
dev_dbg(&client->dev, "fan%u low limit set disabled\n",
|
|
nr + 1);
|
|
|
|
} else if (val < 1350000 / (8 * 254)) {
|
|
new_div = 3;
|
|
data->fan_min[nr] = 254;
|
|
|
|
dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
|
|
nr + 1, FAN_FROM_REG(254, 1 << new_div));
|
|
|
|
} else {
|
|
unsigned int new_min = 1350000 / val;
|
|
|
|
new_div = 0;
|
|
while (new_min > 192 && new_div < 3) {
|
|
new_div++;
|
|
new_min /= 2;
|
|
}
|
|
if (!new_min) /* keep > 0 */
|
|
new_min++;
|
|
|
|
data->fan_min[nr] = new_min;
|
|
|
|
dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
|
|
nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
|
|
}
|
|
|
|
if (new_div != data->fan_div[nr]) {
|
|
data->fan_div[nr] = new_div;
|
|
adm9240_write_fan_div(data, nr, new_div);
|
|
}
|
|
err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(nr),
|
|
data->fan_min[nr]);
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return err < 0 ? err : count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
|
|
static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
|
|
static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0);
|
|
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
|
|
static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
|
|
static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1);
|
|
|
|
/* alarms */
|
|
static ssize_t alarms_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%u\n", data->alarms);
|
|
}
|
|
static DEVICE_ATTR_RO(alarms);
|
|
|
|
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int bitnr = to_sensor_dev_attr(attr)->index;
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
|
|
}
|
|
static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
|
|
static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
|
|
static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
|
|
static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
|
|
static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
|
|
static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
|
|
static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
|
|
static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
|
|
|
|
/* vid */
|
|
static ssize_t cpu0_vid_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
|
|
}
|
|
static DEVICE_ATTR_RO(cpu0_vid);
|
|
|
|
/* analog output */
|
|
static ssize_t aout_output_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct adm9240_data *data = adm9240_update_device(dev);
|
|
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
|
|
}
|
|
|
|
static ssize_t aout_output_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct adm9240_data *data = dev_get_drvdata(dev);
|
|
long val;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->aout = AOUT_TO_REG(val);
|
|
err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, data->aout);
|
|
mutex_unlock(&data->update_lock);
|
|
return err < 0 ? err : count;
|
|
}
|
|
static DEVICE_ATTR_RW(aout_output);
|
|
|
|
static ssize_t alarm_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct adm9240_data *data = dev_get_drvdata(dev);
|
|
unsigned long val;
|
|
int err;
|
|
|
|
if (kstrtoul(buf, 10, &val) || val != 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80);
|
|
data->valid = 0; /* Force cache refresh */
|
|
mutex_unlock(&data->update_lock);
|
|
if (err < 0)
|
|
return err;
|
|
dev_dbg(&data->client->dev, "chassis intrusion latch cleared\n");
|
|
|
|
return count;
|
|
}
|
|
static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12);
|
|
|
|
static struct attribute *adm9240_attrs[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_min.dev_attr.attr,
|
|
&sensor_dev_attr_in0_max.dev_attr.attr,
|
|
&sensor_dev_attr_in0_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in1_min.dev_attr.attr,
|
|
&sensor_dev_attr_in1_max.dev_attr.attr,
|
|
&sensor_dev_attr_in1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_min.dev_attr.attr,
|
|
&sensor_dev_attr_in2_max.dev_attr.attr,
|
|
&sensor_dev_attr_in2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_min.dev_attr.attr,
|
|
&sensor_dev_attr_in3_max.dev_attr.attr,
|
|
&sensor_dev_attr_in3_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_min.dev_attr.attr,
|
|
&sensor_dev_attr_in4_max.dev_attr.attr,
|
|
&sensor_dev_attr_in4_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_min.dev_attr.attr,
|
|
&sensor_dev_attr_in5_max.dev_attr.attr,
|
|
&sensor_dev_attr_in5_alarm.dev_attr.attr,
|
|
&dev_attr_temp1_input.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_aout_output.attr,
|
|
&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
|
|
&dev_attr_cpu0_vid.attr,
|
|
NULL
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(adm9240);
|
|
|
|
/*** sensor chip detect and driver install ***/
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int adm9240_detect(struct i2c_client *new_client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = new_client->adapter;
|
|
const char *name = "";
|
|
int address = new_client->addr;
|
|
u8 man_id, die_rev;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* verify chip: reg address should match i2c address */
|
|
if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
|
|
!= address) {
|
|
dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
|
|
address);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* check known chip manufacturer */
|
|
man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
|
|
if (man_id == 0x23) {
|
|
name = "adm9240";
|
|
} else if (man_id == 0xda) {
|
|
name = "ds1780";
|
|
} else if (man_id == 0x01) {
|
|
name = "lm81";
|
|
} else {
|
|
dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
|
|
man_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* successful detect, print chip info */
|
|
die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
|
|
dev_info(&adapter->dev, "found %s revision %u\n",
|
|
man_id == 0x23 ? "ADM9240" :
|
|
man_id == 0xda ? "DS1780" : "LM81", die_rev);
|
|
|
|
strlcpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adm9240_init_client(struct i2c_client *client, struct adm9240_data *data)
|
|
{
|
|
u8 conf, mode;
|
|
int err;
|
|
|
|
err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1);
|
|
if (err < 0)
|
|
return err;
|
|
err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1);
|
|
if (err < 0)
|
|
return err;
|
|
mode &= 3;
|
|
|
|
data->vrm = vid_which_vrm(); /* need this to report vid as mV */
|
|
|
|
dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
|
|
data->vrm % 10);
|
|
|
|
if (conf & 1) { /* measurement cycle running: report state */
|
|
|
|
dev_info(&client->dev, "status: config 0x%02x mode %u\n",
|
|
conf, mode);
|
|
|
|
} else { /* cold start: open limits before starting chip */
|
|
int i;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
err = regmap_write(data->regmap,
|
|
ADM9240_REG_IN_MIN(i), 0);
|
|
if (err < 0)
|
|
return err;
|
|
err = regmap_write(data->regmap,
|
|
ADM9240_REG_IN_MAX(i), 255);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
err = regmap_write(data->regmap,
|
|
ADM9240_REG_FAN_MIN(i), 255);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
err = regmap_write(data->regmap,
|
|
ADM9240_REG_TEMP_MAX(i), 127);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
/* start measurement cycle */
|
|
err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
dev_info(&client->dev,
|
|
"cold start: config was 0x%02x mode %u\n", conf, mode);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct regmap_config adm9240_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.use_single_read = true,
|
|
.use_single_write = true,
|
|
};
|
|
|
|
static int adm9240_probe(struct i2c_client *new_client)
|
|
{
|
|
struct device *dev = &new_client->dev;
|
|
struct device *hwmon_dev;
|
|
struct adm9240_data *data;
|
|
int err;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->client = new_client;
|
|
mutex_init(&data->update_lock);
|
|
data->regmap = devm_regmap_init_i2c(new_client, &adm9240_regmap_config);
|
|
if (IS_ERR(data->regmap))
|
|
return PTR_ERR(data->regmap);
|
|
|
|
err = adm9240_init_client(new_client, data);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
|
|
new_client->name,
|
|
data,
|
|
adm9240_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id adm9240_id[] = {
|
|
{ "adm9240", adm9240 },
|
|
{ "ds1780", ds1780 },
|
|
{ "lm81", lm81 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, adm9240_id);
|
|
|
|
static struct i2c_driver adm9240_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "adm9240",
|
|
},
|
|
.probe_new = adm9240_probe,
|
|
.id_table = adm9240_id,
|
|
.detect = adm9240_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(adm9240_driver);
|
|
|
|
MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
|
|
"Grant Coady <gcoady.lk@gmail.com> and others");
|
|
MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
|
|
MODULE_LICENSE("GPL");
|