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952 lines
26 KiB
952 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* amc6821.c - Part of lm_sensors, Linux kernel modules for hardware |
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* monitoring |
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* Copyright (C) 2009 T. Mertelj <[email protected]> |
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* |
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* Based on max6650.c: |
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* Copyright (C) 2007 Hans J. Koch <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> /* Needed for KERN_INFO */ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <linux/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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|
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/* |
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* Addresses to scan. |
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*/ |
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static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, |
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0x4c, 0x4d, 0x4e, I2C_CLIENT_END}; |
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|
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/* |
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* Insmod parameters |
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*/ |
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static int pwminv; /*Inverted PWM output. */ |
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module_param(pwminv, int, 0444); |
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static int init = 1; /*Power-on initialization.*/ |
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module_param(init, int, 0444); |
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enum chips { amc6821 }; |
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#define AMC6821_REG_DEV_ID 0x3D |
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#define AMC6821_REG_COMP_ID 0x3E |
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#define AMC6821_REG_CONF1 0x00 |
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#define AMC6821_REG_CONF2 0x01 |
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#define AMC6821_REG_CONF3 0x3F |
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#define AMC6821_REG_CONF4 0x04 |
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#define AMC6821_REG_STAT1 0x02 |
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#define AMC6821_REG_STAT2 0x03 |
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#define AMC6821_REG_TDATA_LOW 0x08 |
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#define AMC6821_REG_TDATA_HI 0x09 |
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#define AMC6821_REG_LTEMP_HI 0x0A |
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#define AMC6821_REG_RTEMP_HI 0x0B |
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#define AMC6821_REG_LTEMP_LIMIT_MIN 0x15 |
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#define AMC6821_REG_LTEMP_LIMIT_MAX 0x14 |
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#define AMC6821_REG_RTEMP_LIMIT_MIN 0x19 |
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#define AMC6821_REG_RTEMP_LIMIT_MAX 0x18 |
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#define AMC6821_REG_LTEMP_CRIT 0x1B |
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#define AMC6821_REG_RTEMP_CRIT 0x1D |
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#define AMC6821_REG_PSV_TEMP 0x1C |
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#define AMC6821_REG_DCY 0x22 |
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#define AMC6821_REG_LTEMP_FAN_CTRL 0x24 |
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#define AMC6821_REG_RTEMP_FAN_CTRL 0x25 |
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#define AMC6821_REG_DCY_LOW_TEMP 0x21 |
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|
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#define AMC6821_REG_TACH_LLIMITL 0x10 |
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#define AMC6821_REG_TACH_LLIMITH 0x11 |
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#define AMC6821_REG_TACH_HLIMITL 0x12 |
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#define AMC6821_REG_TACH_HLIMITH 0x13 |
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#define AMC6821_CONF1_START 0x01 |
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#define AMC6821_CONF1_FAN_INT_EN 0x02 |
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#define AMC6821_CONF1_FANIE 0x04 |
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#define AMC6821_CONF1_PWMINV 0x08 |
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#define AMC6821_CONF1_FAN_FAULT_EN 0x10 |
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#define AMC6821_CONF1_FDRC0 0x20 |
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#define AMC6821_CONF1_FDRC1 0x40 |
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#define AMC6821_CONF1_THERMOVIE 0x80 |
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#define AMC6821_CONF2_PWM_EN 0x01 |
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#define AMC6821_CONF2_TACH_MODE 0x02 |
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#define AMC6821_CONF2_TACH_EN 0x04 |
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#define AMC6821_CONF2_RTFIE 0x08 |
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#define AMC6821_CONF2_LTOIE 0x10 |
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#define AMC6821_CONF2_RTOIE 0x20 |
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#define AMC6821_CONF2_PSVIE 0x40 |
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#define AMC6821_CONF2_RST 0x80 |
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#define AMC6821_CONF3_THERM_FAN_EN 0x80 |
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#define AMC6821_CONF3_REV_MASK 0x0F |
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#define AMC6821_CONF4_OVREN 0x10 |
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#define AMC6821_CONF4_TACH_FAST 0x20 |
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#define AMC6821_CONF4_PSPR 0x40 |
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#define AMC6821_CONF4_MODE 0x80 |
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#define AMC6821_STAT1_RPM_ALARM 0x01 |
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#define AMC6821_STAT1_FANS 0x02 |
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#define AMC6821_STAT1_RTH 0x04 |
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#define AMC6821_STAT1_RTL 0x08 |
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#define AMC6821_STAT1_R_THERM 0x10 |
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#define AMC6821_STAT1_RTF 0x20 |
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#define AMC6821_STAT1_LTH 0x40 |
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#define AMC6821_STAT1_LTL 0x80 |
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#define AMC6821_STAT2_RTC 0x08 |
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#define AMC6821_STAT2_LTC 0x10 |
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#define AMC6821_STAT2_LPSV 0x20 |
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#define AMC6821_STAT2_L_THERM 0x40 |
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#define AMC6821_STAT2_THERM_IN 0x80 |
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enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX, |
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IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN, |
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IDX_TEMP2_MAX, IDX_TEMP2_CRIT, |
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TEMP_IDX_LEN, }; |
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static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI, |
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AMC6821_REG_LTEMP_LIMIT_MIN, |
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AMC6821_REG_LTEMP_LIMIT_MAX, |
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AMC6821_REG_LTEMP_CRIT, |
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AMC6821_REG_RTEMP_HI, |
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AMC6821_REG_RTEMP_LIMIT_MIN, |
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AMC6821_REG_RTEMP_LIMIT_MAX, |
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AMC6821_REG_RTEMP_CRIT, }; |
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enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX, |
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FAN1_IDX_LEN, }; |
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static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW, |
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AMC6821_REG_TACH_LLIMITL, |
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AMC6821_REG_TACH_HLIMITL, }; |
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static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI, |
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AMC6821_REG_TACH_LLIMITH, |
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AMC6821_REG_TACH_HLIMITH, }; |
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/* |
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* Client data (each client gets its own) |
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*/ |
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struct amc6821_data { |
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struct i2c_client *client; |
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struct mutex update_lock; |
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char valid; /* zero until following fields are valid */ |
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unsigned long last_updated; /* in jiffies */ |
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|
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/* register values */ |
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int temp[TEMP_IDX_LEN]; |
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u16 fan[FAN1_IDX_LEN]; |
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u8 fan1_div; |
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u8 pwm1; |
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u8 temp1_auto_point_temp[3]; |
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u8 temp2_auto_point_temp[3]; |
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u8 pwm1_auto_point_pwm[3]; |
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u8 pwm1_enable; |
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u8 pwm1_auto_channels_temp; |
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u8 stat1; |
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u8 stat2; |
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}; |
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static struct amc6821_data *amc6821_update_device(struct device *dev) |
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{ |
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struct amc6821_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int timeout = HZ; |
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u8 reg; |
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int i; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + timeout) || |
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!data->valid) { |
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for (i = 0; i < TEMP_IDX_LEN; i++) |
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data->temp[i] = (int8_t)i2c_smbus_read_byte_data( |
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client, temp_reg[i]); |
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data->stat1 = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_STAT1); |
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data->stat2 = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_STAT2); |
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data->pwm1 = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_DCY); |
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for (i = 0; i < FAN1_IDX_LEN; i++) { |
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data->fan[i] = i2c_smbus_read_byte_data( |
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client, |
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fan_reg_low[i]); |
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data->fan[i] += i2c_smbus_read_byte_data( |
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client, |
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fan_reg_hi[i]) << 8; |
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} |
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data->fan1_div = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_CONF4); |
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data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; |
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data->pwm1_auto_point_pwm[0] = 0; |
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data->pwm1_auto_point_pwm[2] = 255; |
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data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_DCY_LOW_TEMP); |
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data->temp1_auto_point_temp[0] = |
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i2c_smbus_read_byte_data(client, |
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AMC6821_REG_PSV_TEMP); |
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data->temp2_auto_point_temp[0] = |
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data->temp1_auto_point_temp[0]; |
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reg = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_LTEMP_FAN_CTRL); |
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data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; |
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reg &= 0x07; |
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reg = 0x20 >> reg; |
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if (reg > 0) |
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data->temp1_auto_point_temp[2] = |
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data->temp1_auto_point_temp[1] + |
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(data->pwm1_auto_point_pwm[2] - |
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data->pwm1_auto_point_pwm[1]) / reg; |
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else |
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data->temp1_auto_point_temp[2] = 255; |
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reg = i2c_smbus_read_byte_data(client, |
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AMC6821_REG_RTEMP_FAN_CTRL); |
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data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; |
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reg &= 0x07; |
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reg = 0x20 >> reg; |
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if (reg > 0) |
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data->temp2_auto_point_temp[2] = |
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data->temp2_auto_point_temp[1] + |
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(data->pwm1_auto_point_pwm[2] - |
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data->pwm1_auto_point_pwm[1]) / reg; |
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else |
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data->temp2_auto_point_temp[2] = 255; |
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reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
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reg = (reg >> 5) & 0x3; |
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switch (reg) { |
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case 0: /*open loop: software sets pwm1*/ |
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data->pwm1_auto_channels_temp = 0; |
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data->pwm1_enable = 1; |
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break; |
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case 2: /*closed loop: remote T (temp2)*/ |
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data->pwm1_auto_channels_temp = 2; |
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data->pwm1_enable = 2; |
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break; |
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case 3: /*closed loop: local and remote T (temp2)*/ |
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data->pwm1_auto_channels_temp = 3; |
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data->pwm1_enable = 3; |
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break; |
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case 1: /* |
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* semi-open loop: software sets rpm, chip controls |
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* pwm1, currently not implemented |
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*/ |
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data->pwm1_auto_channels_temp = 0; |
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data->pwm1_enable = 0; |
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break; |
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} |
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data->last_updated = 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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static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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int ix = to_sensor_dev_attr(devattr)->index; |
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return sprintf(buf, "%d\n", data->temp[ix] * 1000); |
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} |
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static ssize_t temp_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct amc6821_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ix = to_sensor_dev_attr(attr)->index; |
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long val; |
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int ret = kstrtol(buf, 10, &val); |
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if (ret) |
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return ret; |
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val = clamp_val(val / 1000, -128, 127); |
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mutex_lock(&data->update_lock); |
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data->temp[ix] = val; |
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if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) { |
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dev_err(&client->dev, "Register write error, aborting.\n"); |
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count = -EIO; |
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} |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t temp_alarm_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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int ix = to_sensor_dev_attr(devattr)->index; |
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u8 flag; |
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switch (ix) { |
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case IDX_TEMP1_MIN: |
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flag = data->stat1 & AMC6821_STAT1_LTL; |
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break; |
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case IDX_TEMP1_MAX: |
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flag = data->stat1 & AMC6821_STAT1_LTH; |
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break; |
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case IDX_TEMP1_CRIT: |
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flag = data->stat2 & AMC6821_STAT2_LTC; |
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break; |
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case IDX_TEMP2_MIN: |
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flag = data->stat1 & AMC6821_STAT1_RTL; |
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break; |
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case IDX_TEMP2_MAX: |
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flag = data->stat1 & AMC6821_STAT1_RTH; |
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break; |
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case IDX_TEMP2_CRIT: |
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flag = data->stat2 & AMC6821_STAT2_RTC; |
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break; |
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default: |
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dev_dbg(dev, "Unknown attr->index (%d).\n", ix); |
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return -EINVAL; |
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} |
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if (flag) |
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return sprintf(buf, "1"); |
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else |
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return sprintf(buf, "0"); |
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} |
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static ssize_t temp2_fault_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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if (data->stat1 & AMC6821_STAT1_RTF) |
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return sprintf(buf, "1"); |
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else |
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return sprintf(buf, "0"); |
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} |
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static ssize_t pwm1_show(struct device *dev, struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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return sprintf(buf, "%d\n", data->pwm1); |
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} |
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static ssize_t pwm1_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 amc6821_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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long val; |
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int ret = kstrtol(buf, 10, &val); |
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if (ret) |
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return ret; |
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mutex_lock(&data->update_lock); |
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data->pwm1 = clamp_val(val , 0, 255); |
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i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t pwm1_enable_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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return sprintf(buf, "%d\n", data->pwm1_enable); |
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} |
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static ssize_t pwm1_enable_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 amc6821_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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long val; |
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int config = kstrtol(buf, 10, &val); |
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if (config) |
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return config; |
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mutex_lock(&data->update_lock); |
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config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
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if (config < 0) { |
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dev_err(&client->dev, |
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"Error reading configuration register, aborting.\n"); |
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count = config; |
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goto unlock; |
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} |
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switch (val) { |
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case 1: |
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config &= ~AMC6821_CONF1_FDRC0; |
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config &= ~AMC6821_CONF1_FDRC1; |
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break; |
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case 2: |
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config &= ~AMC6821_CONF1_FDRC0; |
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config |= AMC6821_CONF1_FDRC1; |
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break; |
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case 3: |
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config |= AMC6821_CONF1_FDRC0; |
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config |= AMC6821_CONF1_FDRC1; |
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break; |
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default: |
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count = -EINVAL; |
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goto unlock; |
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} |
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if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) { |
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dev_err(&client->dev, |
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"Configuration register write error, aborting.\n"); |
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count = -EIO; |
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} |
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unlock: |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t pwm1_auto_channels_temp_show(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct amc6821_data *data = amc6821_update_device(dev); |
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return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp); |
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} |
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static ssize_t temp_auto_point_temp_show(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf) |
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{ |
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int ix = to_sensor_dev_attr_2(devattr)->index; |
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int nr = to_sensor_dev_attr_2(devattr)->nr; |
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struct amc6821_data *data = amc6821_update_device(dev); |
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switch (nr) { |
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case 1: |
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return sprintf(buf, "%d\n", |
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data->temp1_auto_point_temp[ix] * 1000); |
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case 2: |
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return sprintf(buf, "%d\n", |
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data->temp2_auto_point_temp[ix] * 1000); |
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default: |
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dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); |
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return -EINVAL; |
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} |
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} |
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static ssize_t pwm1_auto_point_pwm_show(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf) |
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{ |
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int ix = to_sensor_dev_attr(devattr)->index; |
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struct amc6821_data *data = amc6821_update_device(dev); |
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return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]); |
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} |
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|
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static inline ssize_t set_slope_register(struct i2c_client *client, |
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u8 reg, |
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u8 dpwm, |
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u8 *ptemp) |
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{ |
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int dt; |
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u8 tmp; |
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|
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dt = ptemp[2]-ptemp[1]; |
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for (tmp = 4; tmp > 0; tmp--) { |
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if (dt * (0x20 >> tmp) >= dpwm) |
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break; |
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} |
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tmp |= (ptemp[1] & 0x7C) << 1; |
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if (i2c_smbus_write_byte_data(client, |
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reg, tmp)) { |
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dev_err(&client->dev, "Register write error, aborting.\n"); |
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return -EIO; |
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} |
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return 0; |
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} |
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static ssize_t temp_auto_point_temp_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 amc6821_data *data = amc6821_update_device(dev); |
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struct i2c_client *client = data->client; |
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int ix = to_sensor_dev_attr_2(attr)->index; |
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int nr = to_sensor_dev_attr_2(attr)->nr; |
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u8 *ptemp; |
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u8 reg; |
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int dpwm; |
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long val; |
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int ret = kstrtol(buf, 10, &val); |
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if (ret) |
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return ret; |
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|
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switch (nr) { |
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case 1: |
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ptemp = data->temp1_auto_point_temp; |
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reg = AMC6821_REG_LTEMP_FAN_CTRL; |
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break; |
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case 2: |
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ptemp = data->temp2_auto_point_temp; |
|
reg = AMC6821_REG_RTEMP_FAN_CTRL; |
|
break; |
|
default: |
|
dev_dbg(dev, "Unknown attr->nr (%d).\n", nr); |
|
return -EINVAL; |
|
} |
|
|
|
mutex_lock(&data->update_lock); |
|
data->valid = 0; |
|
|
|
switch (ix) { |
|
case 0: |
|
ptemp[0] = clamp_val(val / 1000, 0, |
|
data->temp1_auto_point_temp[1]); |
|
ptemp[0] = clamp_val(ptemp[0], 0, |
|
data->temp2_auto_point_temp[1]); |
|
ptemp[0] = clamp_val(ptemp[0], 0, 63); |
|
if (i2c_smbus_write_byte_data( |
|
client, |
|
AMC6821_REG_PSV_TEMP, |
|
ptemp[0])) { |
|
dev_err(&client->dev, |
|
"Register write error, aborting.\n"); |
|
count = -EIO; |
|
} |
|
goto EXIT; |
|
case 1: |
|
ptemp[1] = clamp_val(val / 1000, (ptemp[0] & 0x7C) + 4, 124); |
|
ptemp[1] &= 0x7C; |
|
ptemp[2] = clamp_val(ptemp[2], ptemp[1] + 1, 255); |
|
break; |
|
case 2: |
|
ptemp[2] = clamp_val(val / 1000, ptemp[1]+1, 255); |
|
break; |
|
default: |
|
dev_dbg(dev, "Unknown attr->index (%d).\n", ix); |
|
count = -EINVAL; |
|
goto EXIT; |
|
} |
|
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; |
|
if (set_slope_register(client, reg, dpwm, ptemp)) |
|
count = -EIO; |
|
|
|
EXIT: |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static ssize_t pwm1_auto_point_pwm_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct amc6821_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
int dpwm; |
|
long val; |
|
int ret = kstrtol(buf, 10, &val); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&data->update_lock); |
|
data->pwm1_auto_point_pwm[1] = clamp_val(val, 0, 254); |
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP, |
|
data->pwm1_auto_point_pwm[1])) { |
|
dev_err(&client->dev, "Register write error, aborting.\n"); |
|
count = -EIO; |
|
goto EXIT; |
|
} |
|
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; |
|
if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm, |
|
data->temp1_auto_point_temp)) { |
|
count = -EIO; |
|
goto EXIT; |
|
} |
|
if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm, |
|
data->temp2_auto_point_temp)) { |
|
count = -EIO; |
|
goto EXIT; |
|
} |
|
|
|
EXIT: |
|
data->valid = 0; |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct amc6821_data *data = amc6821_update_device(dev); |
|
int ix = to_sensor_dev_attr(devattr)->index; |
|
if (0 == data->fan[ix]) |
|
return sprintf(buf, "0"); |
|
return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix])); |
|
} |
|
|
|
static ssize_t fan1_fault_show(struct device *dev, |
|
struct device_attribute *devattr, char *buf) |
|
{ |
|
struct amc6821_data *data = amc6821_update_device(dev); |
|
if (data->stat1 & AMC6821_STAT1_FANS) |
|
return sprintf(buf, "1"); |
|
else |
|
return sprintf(buf, "0"); |
|
} |
|
|
|
static ssize_t fan_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct amc6821_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
long val; |
|
int ix = to_sensor_dev_attr(attr)->index; |
|
int ret = kstrtol(buf, 10, &val); |
|
if (ret) |
|
return ret; |
|
val = 1 > val ? 0xFFFF : 6000000/val; |
|
|
|
mutex_lock(&data->update_lock); |
|
data->fan[ix] = (u16) clamp_val(val, 1, 0xFFFF); |
|
if (i2c_smbus_write_byte_data(client, fan_reg_low[ix], |
|
data->fan[ix] & 0xFF)) { |
|
dev_err(&client->dev, "Register write error, aborting.\n"); |
|
count = -EIO; |
|
goto EXIT; |
|
} |
|
if (i2c_smbus_write_byte_data(client, |
|
fan_reg_hi[ix], data->fan[ix] >> 8)) { |
|
dev_err(&client->dev, "Register write error, aborting.\n"); |
|
count = -EIO; |
|
} |
|
EXIT: |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static ssize_t fan1_div_show(struct device *dev, |
|
struct device_attribute *devattr, char *buf) |
|
{ |
|
struct amc6821_data *data = amc6821_update_device(dev); |
|
return sprintf(buf, "%d\n", data->fan1_div); |
|
} |
|
|
|
static ssize_t fan1_div_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, |
|
size_t count) |
|
{ |
|
struct amc6821_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
long val; |
|
int config = kstrtol(buf, 10, &val); |
|
if (config) |
|
return config; |
|
|
|
mutex_lock(&data->update_lock); |
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); |
|
if (config < 0) { |
|
dev_err(&client->dev, |
|
"Error reading configuration register, aborting.\n"); |
|
count = config; |
|
goto EXIT; |
|
} |
|
switch (val) { |
|
case 2: |
|
config &= ~AMC6821_CONF4_PSPR; |
|
data->fan1_div = 2; |
|
break; |
|
case 4: |
|
config |= AMC6821_CONF4_PSPR; |
|
data->fan1_div = 4; |
|
break; |
|
default: |
|
count = -EINVAL; |
|
goto EXIT; |
|
} |
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) { |
|
dev_err(&client->dev, |
|
"Configuration register write error, aborting.\n"); |
|
count = -EIO; |
|
} |
|
EXIT: |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, IDX_TEMP1_INPUT); |
|
static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, IDX_TEMP1_MIN); |
|
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, IDX_TEMP1_MAX); |
|
static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, IDX_TEMP1_CRIT); |
|
static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_alarm, IDX_TEMP1_MIN); |
|
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_alarm, IDX_TEMP1_MAX); |
|
static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_alarm, IDX_TEMP1_CRIT); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, IDX_TEMP2_INPUT); |
|
static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, IDX_TEMP2_MIN); |
|
static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, IDX_TEMP2_MAX); |
|
static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, IDX_TEMP2_CRIT); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp2_fault, 0); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_alarm, IDX_TEMP2_MIN); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_alarm, IDX_TEMP2_MAX); |
|
static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_alarm, IDX_TEMP2_CRIT); |
|
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, IDX_FAN1_INPUT); |
|
static SENSOR_DEVICE_ATTR_RW(fan1_min, fan, IDX_FAN1_MIN); |
|
static SENSOR_DEVICE_ATTR_RW(fan1_max, fan, IDX_FAN1_MAX); |
|
static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan1_fault, 0); |
|
static SENSOR_DEVICE_ATTR_RW(fan1_div, fan1_div, 0); |
|
|
|
static SENSOR_DEVICE_ATTR_RW(pwm1, pwm1, 0); |
|
static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm1_enable, 0); |
|
static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm1_auto_point_pwm, 0); |
|
static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm1_auto_point_pwm, 1); |
|
static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point3_pwm, pwm1_auto_point_pwm, 2); |
|
static SENSOR_DEVICE_ATTR_RO(pwm1_auto_channels_temp, pwm1_auto_channels_temp, |
|
0); |
|
static SENSOR_DEVICE_ATTR_2_RO(temp1_auto_point1_temp, temp_auto_point_temp, |
|
1, 0); |
|
static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, temp_auto_point_temp, |
|
1, 1); |
|
static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point3_temp, temp_auto_point_temp, |
|
1, 2); |
|
|
|
static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp_auto_point_temp, |
|
2, 0); |
|
static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, temp_auto_point_temp, |
|
2, 1); |
|
static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point3_temp, temp_auto_point_temp, |
|
2, 2); |
|
|
|
static struct attribute *amc6821_attrs[] = { |
|
&sensor_dev_attr_temp1_input.dev_attr.attr, |
|
&sensor_dev_attr_temp1_min.dev_attr.attr, |
|
&sensor_dev_attr_temp1_max.dev_attr.attr, |
|
&sensor_dev_attr_temp1_crit.dev_attr.attr, |
|
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_input.dev_attr.attr, |
|
&sensor_dev_attr_temp2_min.dev_attr.attr, |
|
&sensor_dev_attr_temp2_max.dev_attr.attr, |
|
&sensor_dev_attr_temp2_crit.dev_attr.attr, |
|
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_fault.dev_attr.attr, |
|
&sensor_dev_attr_fan1_input.dev_attr.attr, |
|
&sensor_dev_attr_fan1_min.dev_attr.attr, |
|
&sensor_dev_attr_fan1_max.dev_attr.attr, |
|
&sensor_dev_attr_fan1_fault.dev_attr.attr, |
|
&sensor_dev_attr_fan1_div.dev_attr.attr, |
|
&sensor_dev_attr_pwm1.dev_attr.attr, |
|
&sensor_dev_attr_pwm1_enable.dev_attr.attr, |
|
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, |
|
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, |
|
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, |
|
&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, |
|
&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, |
|
&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, |
|
&sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr, |
|
&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, |
|
&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, |
|
&sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(amc6821); |
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */ |
|
static int amc6821_detect( |
|
struct i2c_client *client, |
|
struct i2c_board_info *info) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
int address = client->addr; |
|
int dev_id, comp_id; |
|
|
|
dev_dbg(&adapter->dev, "amc6821_detect called.\n"); |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
|
dev_dbg(&adapter->dev, |
|
"amc6821: I2C bus doesn't support byte mode, " |
|
"skipping.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID); |
|
comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID); |
|
if (dev_id != 0x21 || comp_id != 0x49) { |
|
dev_dbg(&adapter->dev, |
|
"amc6821: detection failed at 0x%02x.\n", |
|
address); |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* Bit 7 of the address register is ignored, so we can check the |
|
* ID registers again |
|
*/ |
|
dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID); |
|
comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID); |
|
if (dev_id != 0x21 || comp_id != 0x49) { |
|
dev_dbg(&adapter->dev, |
|
"amc6821: detection failed at 0x%02x.\n", |
|
address); |
|
return -ENODEV; |
|
} |
|
|
|
dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address); |
|
strlcpy(info->type, "amc6821", I2C_NAME_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
static int amc6821_init_client(struct i2c_client *client) |
|
{ |
|
int config; |
|
int err = -EIO; |
|
|
|
if (init) { |
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); |
|
|
|
if (config < 0) { |
|
dev_err(&client->dev, |
|
"Error reading configuration register, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config |= AMC6821_CONF4_MODE; |
|
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, |
|
config)) { |
|
dev_err(&client->dev, |
|
"Configuration register write error, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3); |
|
|
|
if (config < 0) { |
|
dev_err(&client->dev, |
|
"Error reading configuration register, aborting.\n"); |
|
return err; |
|
} |
|
|
|
dev_info(&client->dev, "Revision %d\n", config & 0x0f); |
|
|
|
config &= ~AMC6821_CONF3_THERM_FAN_EN; |
|
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3, |
|
config)) { |
|
dev_err(&client->dev, |
|
"Configuration register write error, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2); |
|
|
|
if (config < 0) { |
|
dev_err(&client->dev, |
|
"Error reading configuration register, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config &= ~AMC6821_CONF2_RTFIE; |
|
config &= ~AMC6821_CONF2_LTOIE; |
|
config &= ~AMC6821_CONF2_RTOIE; |
|
if (i2c_smbus_write_byte_data(client, |
|
AMC6821_REG_CONF2, config)) { |
|
dev_err(&client->dev, |
|
"Configuration register write error, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
|
|
|
if (config < 0) { |
|
dev_err(&client->dev, |
|
"Error reading configuration register, aborting.\n"); |
|
return err; |
|
} |
|
|
|
config &= ~AMC6821_CONF1_THERMOVIE; |
|
config &= ~AMC6821_CONF1_FANIE; |
|
config |= AMC6821_CONF1_START; |
|
if (pwminv) |
|
config |= AMC6821_CONF1_PWMINV; |
|
else |
|
config &= ~AMC6821_CONF1_PWMINV; |
|
|
|
if (i2c_smbus_write_byte_data( |
|
client, AMC6821_REG_CONF1, config)) { |
|
dev_err(&client->dev, |
|
"Configuration register write error, aborting.\n"); |
|
return err; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int amc6821_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct amc6821_data *data; |
|
struct device *hwmon_dev; |
|
int err; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct amc6821_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
mutex_init(&data->update_lock); |
|
|
|
/* |
|
* Initialize the amc6821 chip |
|
*/ |
|
err = amc6821_init_client(client); |
|
if (err) |
|
return err; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, |
|
amc6821_groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct i2c_device_id amc6821_id[] = { |
|
{ "amc6821", amc6821 }, |
|
{ } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, amc6821_id); |
|
|
|
static struct i2c_driver amc6821_driver = { |
|
.class = I2C_CLASS_HWMON, |
|
.driver = { |
|
.name = "amc6821", |
|
}, |
|
.probe_new = amc6821_probe, |
|
.id_table = amc6821_id, |
|
.detect = amc6821_detect, |
|
.address_list = normal_i2c, |
|
}; |
|
|
|
module_i2c_driver(amc6821_driver); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("T. Mertelj <[email protected]>"); |
|
MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");
|
|
|