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833 lines
20 KiB
833 lines
20 KiB
// 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 <[email protected]> |
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* Philip Edelbrock <[email protected]> |
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* Copyright (C) 2003 Michiel Rook <[email protected]> |
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* Copyright (C) 2005 Grant Coady <[email protected]> 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/bits.h> |
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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/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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|
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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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|
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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 device *dev; |
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struct regmap *regmap; |
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struct mutex update_lock; |
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u8 fan_div[2]; /* rw fan1_div, read-only accessor */ |
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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 channel, u8 fan_div) |
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{ |
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unsigned int reg, old, shift = (channel + 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->dev, |
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"fan%d clock divider changed from %lu to %lu\n", |
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channel + 1, BIT(old), BIT(fan_div)); |
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return 0; |
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} |
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/* |
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* set fan speed low limit: |
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* |
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* - value is zero: disable fan speed low limit alarm |
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* |
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* - value is below fan speed measurement range: enable fan speed low |
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* limit alarm to be asserted while fan speed too slow to measure |
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* |
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* - otherwise: select fan clock divider to suit fan speed low limit, |
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* measurement code may adjust registers to ensure fan speed reading |
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*/ |
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static int adm9240_fan_min_write(struct adm9240_data *data, int channel, long val) |
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{ |
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u8 new_div; |
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u8 fan_min; |
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int err; |
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mutex_lock(&data->update_lock); |
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if (!val) { |
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fan_min = 255; |
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new_div = data->fan_div[channel]; |
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dev_dbg(data->dev, "fan%u low limit set disabled\n", channel + 1); |
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} else if (val < 1350000 / (8 * 254)) { |
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new_div = 3; |
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fan_min = 254; |
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dev_dbg(data->dev, "fan%u low limit set minimum %u\n", |
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channel + 1, FAN_FROM_REG(254, BIT(new_div))); |
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} else { |
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unsigned int new_min = 1350000 / val; |
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new_div = 0; |
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while (new_min > 192 && new_div < 3) { |
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new_div++; |
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new_min /= 2; |
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} |
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if (!new_min) /* keep > 0 */ |
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new_min++; |
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fan_min = new_min; |
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dev_dbg(data->dev, "fan%u low limit set fan speed %u\n", |
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channel + 1, FAN_FROM_REG(new_min, BIT(new_div))); |
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} |
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if (new_div != data->fan_div[channel]) { |
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data->fan_div[channel] = new_div; |
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adm9240_write_fan_div(data, channel, new_div); |
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} |
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err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(channel), fan_min); |
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mutex_unlock(&data->update_lock); |
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return err; |
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} |
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static ssize_t cpu0_vid_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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unsigned int regval; |
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int err; |
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u8 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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vid = regval & 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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vid |= (regval & 1) << 4; |
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return sprintf(buf, "%d\n", vid_from_reg(vid, data->vrm)); |
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} |
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static DEVICE_ATTR_RO(cpu0_vid); |
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static ssize_t aout_output_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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unsigned int regval; |
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int err; |
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err = regmap_read(data->regmap, ADM9240_REG_ANALOG_OUT, ®val); |
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if (err) |
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return err; |
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return sprintf(buf, "%d\n", AOUT_FROM_REG(regval)); |
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} |
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static ssize_t aout_output_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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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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err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, AOUT_TO_REG(val)); |
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return err < 0 ? err : count; |
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} |
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static DEVICE_ATTR_RW(aout_output); |
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static struct attribute *adm9240_attrs[] = { |
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&dev_attr_aout_output.attr, |
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&dev_attr_cpu0_vid.attr, |
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NULL |
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}; |
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ATTRIBUTE_GROUPS(adm9240); |
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/*** sensor chip detect and driver install ***/ |
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/* Return 0 if detection is successful, -ENODEV otherwise */ |
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static int adm9240_detect(struct i2c_client *new_client, |
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struct i2c_board_info *info) |
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{ |
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struct i2c_adapter *adapter = new_client->adapter; |
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const char *name = ""; |
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int address = new_client->addr; |
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u8 man_id, die_rev; |
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
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/* verify chip: reg address should match i2c address */ |
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if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) != address) |
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return -ENODEV; |
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/* check known chip manufacturer */ |
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man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); |
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if (man_id == 0x23) |
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name = "adm9240"; |
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else if (man_id == 0xda) |
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name = "ds1780"; |
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else if (man_id == 0x01) |
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name = "lm81"; |
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else |
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return -ENODEV; |
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/* successful detect, print chip info */ |
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die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); |
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dev_info(&adapter->dev, "found %s revision %u\n", |
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man_id == 0x23 ? "ADM9240" : |
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man_id == 0xda ? "DS1780" : "LM81", die_rev); |
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strscpy(info->type, name, I2C_NAME_SIZE); |
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return 0; |
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} |
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static int adm9240_init_client(struct adm9240_data *data) |
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{ |
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unsigned int regval; |
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u8 conf, mode; |
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int err; |
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err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 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_TEMP_CONF, &mode, 1); |
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if (err < 0) |
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return err; |
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mode &= 3; |
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data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
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dev_info(data->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
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data->vrm % 10); |
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if (conf & 1) { /* measurement cycle running: report state */ |
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dev_info(data->dev, "status: config 0x%02x mode %u\n", |
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conf, mode); |
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} else { /* cold start: open limits before starting chip */ |
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int i; |
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for (i = 0; i < 6; i++) { |
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err = regmap_write(data->regmap, |
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ADM9240_REG_IN_MIN(i), 0); |
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if (err < 0) |
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return err; |
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err = regmap_write(data->regmap, |
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ADM9240_REG_IN_MAX(i), 255); |
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if (err < 0) |
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return err; |
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} |
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for (i = 0; i < 2; i++) { |
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err = regmap_write(data->regmap, |
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ADM9240_REG_FAN_MIN(i), 255); |
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if (err < 0) |
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return err; |
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} |
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for (i = 0; i < 2; i++) { |
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err = regmap_write(data->regmap, |
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ADM9240_REG_TEMP_MAX(i), 127); |
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if (err < 0) |
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return err; |
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} |
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/* start measurement cycle */ |
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err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1); |
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if (err < 0) |
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return err; |
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dev_info(data->dev, |
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"cold start: config was 0x%02x mode %u\n", conf, mode); |
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} |
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/* read fan divs */ |
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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] = (regval >> 4) & 3; |
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data->fan_div[1] = (regval >> 6) & 3; |
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return 0; |
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} |
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static int adm9240_chip_read(struct device *dev, u32 attr, long *val) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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u8 regs[2]; |
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int err; |
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switch (attr) { |
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case hwmon_chip_alarms: |
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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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*val = regs[0] | regs[1] << 8; |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return 0; |
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} |
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static int adm9240_intrusion_read(struct device *dev, u32 attr, long *val) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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unsigned int regval; |
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int err; |
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switch (attr) { |
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case hwmon_intrusion_alarm: |
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err = regmap_read(data->regmap, ADM9240_REG_INT(1), ®val); |
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if (err < 0) |
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return err; |
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*val = !!(regval & BIT(4)); |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return 0; |
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} |
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static int adm9240_intrusion_write(struct device *dev, u32 attr, long val) |
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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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switch (attr) { |
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case hwmon_intrusion_alarm: |
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if (val) |
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return -EINVAL; |
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err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80); |
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if (err < 0) |
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return err; |
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dev_dbg(data->dev, "chassis intrusion latch cleared\n"); |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return 0; |
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} |
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static int adm9240_in_read(struct device *dev, u32 attr, int channel, long *val) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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unsigned int regval; |
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int reg; |
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int err; |
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switch (attr) { |
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case hwmon_in_input: |
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reg = ADM9240_REG_IN(channel); |
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break; |
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case hwmon_in_min: |
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reg = ADM9240_REG_IN_MIN(channel); |
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break; |
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case hwmon_in_max: |
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reg = ADM9240_REG_IN_MAX(channel); |
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break; |
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case hwmon_in_alarm: |
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if (channel < 4) { |
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reg = ADM9240_REG_INT(0); |
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} else { |
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reg = ADM9240_REG_INT(1); |
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channel -= 4; |
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} |
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err = regmap_read(data->regmap, reg, ®val); |
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if (err < 0) |
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return err; |
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*val = !!(regval & BIT(channel)); |
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return 0; |
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default: |
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return -EOPNOTSUPP; |
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} |
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err = regmap_read(data->regmap, reg, ®val); |
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if (err < 0) |
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return err; |
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*val = IN_FROM_REG(regval, channel); |
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return 0; |
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} |
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static int adm9240_in_write(struct device *dev, u32 attr, int channel, long val) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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int reg; |
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switch (attr) { |
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case hwmon_in_min: |
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reg = ADM9240_REG_IN_MIN(channel); |
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break; |
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case hwmon_in_max: |
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reg = ADM9240_REG_IN_MAX(channel); |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return regmap_write(data->regmap, reg, IN_TO_REG(val, channel)); |
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} |
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static int adm9240_fan_read(struct device *dev, u32 attr, int channel, long *val) |
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{ |
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struct adm9240_data *data = dev_get_drvdata(dev); |
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unsigned int regval; |
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int err; |
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switch (attr) { |
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case hwmon_fan_input: |
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mutex_lock(&data->update_lock); |
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err = regmap_read(data->regmap, ADM9240_REG_FAN(channel), ®val); |
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if (err < 0) { |
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mutex_unlock(&data->update_lock); |
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return err; |
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} |
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if (regval == 255 && data->fan_div[channel] < 3) { |
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/* adjust fan clock divider on overflow */ |
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err = adm9240_write_fan_div(data, channel, |
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++data->fan_div[channel]); |
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if (err) { |
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mutex_unlock(&data->update_lock); |
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return err; |
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} |
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} |
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*val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); |
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mutex_unlock(&data->update_lock); |
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break; |
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case hwmon_fan_div: |
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*val = BIT(data->fan_div[channel]); |
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break; |
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case hwmon_fan_min: |
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err = regmap_read(data->regmap, ADM9240_REG_FAN_MIN(channel), ®val); |
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if (err < 0) |
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return err; |
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*val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); |
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break; |
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case hwmon_fan_alarm: |
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err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); |
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if (err < 0) |
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return err; |
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*val = !!(regval & BIT(channel + 6)); |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return 0; |
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} |
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static int adm9240_fan_write(struct device *dev, u32 attr, int channel, long val) |
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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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|
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switch (attr) { |
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case hwmon_fan_min: |
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err = adm9240_fan_min_write(data, channel, val); |
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if (err < 0) |
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return err; |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return 0; |
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} |
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|
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static int adm9240_temp_read(struct device *dev, u32 attr, int channel, long *val) |
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{ |
|
struct adm9240_data *data = dev_get_drvdata(dev); |
|
unsigned int regval; |
|
int err, temp; |
|
|
|
switch (attr) { |
|
case hwmon_temp_input: |
|
err = regmap_read(data->regmap, ADM9240_REG_TEMP, ®val); |
|
if (err < 0) |
|
return err; |
|
temp = regval << 1; |
|
err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, ®val); |
|
if (err < 0) |
|
return err; |
|
temp |= regval >> 7; |
|
*val = sign_extend32(temp, 8) * 500; |
|
break; |
|
case hwmon_temp_max: |
|
err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(0), ®val); |
|
if (err < 0) |
|
return err; |
|
*val = (s8)regval * 1000; |
|
break; |
|
case hwmon_temp_max_hyst: |
|
err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(1), ®val); |
|
if (err < 0) |
|
return err; |
|
*val = (s8)regval * 1000; |
|
break; |
|
case hwmon_temp_alarm: |
|
err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); |
|
if (err < 0) |
|
return err; |
|
*val = !!(regval & BIT(4)); |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
return 0; |
|
} |
|
|
|
static int adm9240_temp_write(struct device *dev, u32 attr, int channel, long val) |
|
{ |
|
struct adm9240_data *data = dev_get_drvdata(dev); |
|
int reg; |
|
|
|
switch (attr) { |
|
case hwmon_temp_max: |
|
reg = ADM9240_REG_TEMP_MAX(0); |
|
break; |
|
case hwmon_temp_max_hyst: |
|
reg = ADM9240_REG_TEMP_MAX(1); |
|
break; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
return regmap_write(data->regmap, reg, TEMP_TO_REG(val)); |
|
} |
|
|
|
static int adm9240_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, |
|
int channel, long *val) |
|
{ |
|
switch (type) { |
|
case hwmon_chip: |
|
return adm9240_chip_read(dev, attr, val); |
|
case hwmon_intrusion: |
|
return adm9240_intrusion_read(dev, attr, val); |
|
case hwmon_in: |
|
return adm9240_in_read(dev, attr, channel, val); |
|
case hwmon_fan: |
|
return adm9240_fan_read(dev, attr, channel, val); |
|
case hwmon_temp: |
|
return adm9240_temp_read(dev, attr, channel, val); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int adm9240_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, |
|
int channel, long val) |
|
{ |
|
switch (type) { |
|
case hwmon_intrusion: |
|
return adm9240_intrusion_write(dev, attr, val); |
|
case hwmon_in: |
|
return adm9240_in_write(dev, attr, channel, val); |
|
case hwmon_fan: |
|
return adm9240_fan_write(dev, attr, channel, val); |
|
case hwmon_temp: |
|
return adm9240_temp_write(dev, attr, channel, val); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static umode_t adm9240_is_visible(const void *_data, enum hwmon_sensor_types type, |
|
u32 attr, int channel) |
|
{ |
|
umode_t mode = 0; |
|
|
|
switch (type) { |
|
case hwmon_chip: |
|
switch (attr) { |
|
case hwmon_chip_alarms: |
|
mode = 0444; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_intrusion: |
|
switch (attr) { |
|
case hwmon_intrusion_alarm: |
|
mode = 0644; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp: |
|
case hwmon_temp_alarm: |
|
mode = 0444; |
|
break; |
|
case hwmon_temp_max: |
|
case hwmon_temp_max_hyst: |
|
mode = 0644; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_input: |
|
case hwmon_fan_div: |
|
case hwmon_fan_alarm: |
|
mode = 0444; |
|
break; |
|
case hwmon_fan_min: |
|
mode = 0644; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_in: |
|
switch (attr) { |
|
case hwmon_in_input: |
|
case hwmon_in_alarm: |
|
mode = 0444; |
|
break; |
|
case hwmon_in_min: |
|
case hwmon_in_max: |
|
mode = 0644; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
return mode; |
|
} |
|
|
|
static const struct hwmon_ops adm9240_hwmon_ops = { |
|
.is_visible = adm9240_is_visible, |
|
.read = adm9240_read, |
|
.write = adm9240_write, |
|
}; |
|
|
|
static const struct hwmon_channel_info *adm9240_info[] = { |
|
HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS), |
|
HWMON_CHANNEL_INFO(intrusion, HWMON_INTRUSION_ALARM), |
|
HWMON_CHANNEL_INFO(temp, |
|
HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_ALARM), |
|
HWMON_CHANNEL_INFO(in, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), |
|
HWMON_CHANNEL_INFO(fan, |
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM, |
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM), |
|
NULL |
|
}; |
|
|
|
static const struct hwmon_chip_info adm9240_chip_info = { |
|
.ops = &adm9240_hwmon_ops, |
|
.info = adm9240_info, |
|
}; |
|
|
|
static bool adm9240_volatile_reg(struct device *dev, unsigned int reg) |
|
{ |
|
switch (reg) { |
|
case ADM9240_REG_IN(0) ... ADM9240_REG_IN(5): |
|
case ADM9240_REG_FAN(0) ... ADM9240_REG_FAN(1): |
|
case ADM9240_REG_INT(0) ... ADM9240_REG_INT(1): |
|
case ADM9240_REG_TEMP: |
|
case ADM9240_REG_TEMP_CONF: |
|
case ADM9240_REG_VID_FAN_DIV: |
|
case ADM9240_REG_VID4: |
|
case ADM9240_REG_ANALOG_OUT: |
|
return true; |
|
default: |
|
return false; |
|
} |
|
} |
|
|
|
static const struct regmap_config adm9240_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.use_single_read = true, |
|
.use_single_write = true, |
|
.volatile_reg = adm9240_volatile_reg, |
|
}; |
|
|
|
static int adm9240_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &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->dev = dev; |
|
mutex_init(&data->update_lock); |
|
data->regmap = devm_regmap_init_i2c(client, &adm9240_regmap_config); |
|
if (IS_ERR(data->regmap)) |
|
return PTR_ERR(data->regmap); |
|
|
|
err = adm9240_init_client(data); |
|
if (err < 0) |
|
return err; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, |
|
&adm9240_chip_info, |
|
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 <[email protected]>, " |
|
"Grant Coady <[email protected]> and others"); |
|
MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
|
MODULE_LICENSE("GPL");
|
|
|