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885 lines
24 KiB
885 lines
24 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/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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|
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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 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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|
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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); |
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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", FAN_FROM_REG(data->fan[attr->index], |
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1 << data->fan_div[attr->index])); |
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} |
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static ssize_t fan_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", FAN_FROM_REG(data->fan_min[attr->index], |
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1 << data->fan_div[attr->index])); |
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} |
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static ssize_t fan_div_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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|
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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", 1 << data->fan_div[attr->index]); |
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} |
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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 ssize_t fan_min_store(struct device *dev, |
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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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struct i2c_client *client = data->client; |
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int nr = attr->index; |
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u8 new_div; |
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unsigned long val; |
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int err; |
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|
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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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|
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mutex_lock(&data->update_lock); |
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|
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if (!val) { |
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data->fan_min[nr] = 255; |
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new_div = data->fan_div[nr]; |
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|
|
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 <[email protected]>, " |
|
"Grant Coady <[email protected]> and others"); |
|
MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
|
MODULE_LICENSE("GPL");
|
|
|