834 lines
20 KiB
C
834 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* adm9240.c Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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*
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* Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
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* Philip Edelbrock <phil@netroedge.com>
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* Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
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* Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
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* guidance from Jean Delvare
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*
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* Driver supports Analog Devices ADM9240
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* Dallas Semiconductor DS1780
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* National Semiconductor LM81
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*
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* ADM9240 is the reference, DS1780 and LM81 are register compatibles
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*
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* Voltage Six inputs are scaled by chip, VID also reported
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* Temperature Chip temperature to 0.5'C, maximum and max_hysteris
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* Fans 2 fans, low speed alarm, automatic fan clock divider
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* Alarms 16-bit map of active alarms
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* Analog Out 0..1250 mV output
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*
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* Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
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*
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* Test hardware: Intel SE440BX-2 desktop motherboard --Grant
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*
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* LM81 extended temp reading not implemented
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*/
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#include <linux/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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/* ADM9240 registers */
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#define ADM9240_REG_MAN_ID 0x3e
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#define ADM9240_REG_DIE_REV 0x3f
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#define ADM9240_REG_CONFIG 0x40
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#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
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#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
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#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
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#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
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#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
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#define ADM9240_REG_INT(nr) (0x41 + (nr))
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#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
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#define ADM9240_REG_TEMP 0x27
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#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
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#define ADM9240_REG_ANALOG_OUT 0x19
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#define ADM9240_REG_CHASSIS_CLEAR 0x46
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#define ADM9240_REG_VID_FAN_DIV 0x47
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#define ADM9240_REG_I2C_ADDR 0x48
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#define ADM9240_REG_VID4 0x49
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#define ADM9240_REG_TEMP_CONF 0x4b
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/* generalised scaling with integer rounding */
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static inline int SCALE(long val, int mul, int div)
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{
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if (val < 0)
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return (val * mul - div / 2) / div;
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else
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return (val * mul + div / 2) / div;
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}
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/* adm9240 internally scales voltage measurements */
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static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
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static inline unsigned int IN_FROM_REG(u8 reg, int n)
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{
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return SCALE(reg, nom_mv[n], 192);
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}
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static inline u8 IN_TO_REG(unsigned long val, int n)
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{
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val = clamp_val(val, 0, nom_mv[n] * 255 / 192);
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return SCALE(val, 192, nom_mv[n]);
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}
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/* temperature range: -40..125, 127 disables temperature alarm */
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static inline s8 TEMP_TO_REG(long val)
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{
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val = clamp_val(val, -40000, 127000);
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return SCALE(val, 1, 1000);
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}
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/* two fans, each with low fan speed limit */
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static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
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{
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if (!reg) /* error */
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return -1;
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if (reg == 255)
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return 0;
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return SCALE(1350000, 1, reg * div);
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}
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/* analog out 0..1250mV */
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static inline u8 AOUT_TO_REG(unsigned long val)
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{
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val = clamp_val(val, 0, 1250);
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return SCALE(val, 255, 1250);
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}
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static inline unsigned int AOUT_FROM_REG(u8 reg)
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{
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return SCALE(reg, 1250, 255);
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}
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/* per client data */
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struct adm9240_data {
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struct 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) {
|
|
case hwmon_fan_input:
|
|
mutex_lock(&data->update_lock);
|
|
err = regmap_read(data->regmap, ADM9240_REG_FAN(channel), ®val);
|
|
if (err < 0) {
|
|
mutex_unlock(&data->update_lock);
|
|
return err;
|
|
}
|
|
if (regval == 255 && data->fan_div[channel] < 3) {
|
|
/* adjust fan clock divider on overflow */
|
|
err = adm9240_write_fan_div(data, channel,
|
|
++data->fan_div[channel]);
|
|
if (err) {
|
|
mutex_unlock(&data->update_lock);
|
|
return err;
|
|
}
|
|
}
|
|
*val = FAN_FROM_REG(regval, BIT(data->fan_div[channel]));
|
|
mutex_unlock(&data->update_lock);
|
|
break;
|
|
case hwmon_fan_div:
|
|
*val = BIT(data->fan_div[channel]);
|
|
break;
|
|
case hwmon_fan_min:
|
|
err = regmap_read(data->regmap, ADM9240_REG_FAN_MIN(channel), ®val);
|
|
if (err < 0)
|
|
return err;
|
|
*val = FAN_FROM_REG(regval, BIT(data->fan_div[channel]));
|
|
break;
|
|
case hwmon_fan_alarm:
|
|
err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val);
|
|
if (err < 0)
|
|
return err;
|
|
*val = !!(regval & BIT(channel + 6));
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int adm9240_fan_write(struct device *dev, u32 attr, int channel, long val)
|
|
{
|
|
struct adm9240_data *data = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
switch (attr) {
|
|
case hwmon_fan_min:
|
|
err = adm9240_fan_min_write(data, channel, val);
|
|
if (err < 0)
|
|
return err;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int adm9240_temp_read(struct device *dev, u32 attr, int channel, long *val)
|
|
{
|
|
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 <michiel@grendelproject.nl>, "
|
|
"Grant Coady <gcoady.lk@gmail.com> and others");
|
|
MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
|
|
MODULE_LICENSE("GPL");
|