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765 lines
20 KiB
765 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* w83l786ng.c - Linux kernel driver for hardware monitoring |
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* Copyright (c) 2007 Kevin Lo <[email protected]> |
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*/ |
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|
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/* |
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* Supports following chips: |
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* |
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* Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA |
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* w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no |
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*/ |
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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/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-vid.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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#include <linux/jiffies.h> |
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/* Addresses to scan */ |
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static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; |
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/* Insmod parameters */ |
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static bool reset; |
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module_param(reset, bool, 0); |
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MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); |
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#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) |
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#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) |
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#define W83L786NG_REG_IN(nr) ((nr) + 0x20) |
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#define W83L786NG_REG_FAN(nr) ((nr) + 0x28) |
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#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) |
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#define W83L786NG_REG_CONFIG 0x40 |
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#define W83L786NG_REG_ALARM1 0x41 |
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#define W83L786NG_REG_ALARM2 0x42 |
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#define W83L786NG_REG_GPIO_EN 0x47 |
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#define W83L786NG_REG_MAN_ID2 0x4C |
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#define W83L786NG_REG_MAN_ID1 0x4D |
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#define W83L786NG_REG_CHIP_ID 0x4E |
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#define W83L786NG_REG_DIODE 0x53 |
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#define W83L786NG_REG_FAN_DIV 0x54 |
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#define W83L786NG_REG_FAN_CFG 0x80 |
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#define W83L786NG_REG_TOLERANCE 0x8D |
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static const u8 W83L786NG_REG_TEMP[2][3] = { |
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{ 0x25, /* TEMP 0 in DataSheet */ |
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0x35, /* TEMP 0 Over in DataSheet */ |
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0x36 }, /* TEMP 0 Hyst in DataSheet */ |
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{ 0x26, /* TEMP 1 in DataSheet */ |
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0x37, /* TEMP 1 Over in DataSheet */ |
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0x38 } /* TEMP 1 Hyst in DataSheet */ |
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}; |
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static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; |
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static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; |
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/* FAN Duty Cycle, be used to control */ |
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static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; |
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static inline u8 |
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FAN_TO_REG(long rpm, int div) |
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{ |
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if (rpm == 0) |
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return 255; |
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rpm = clamp_val(rpm, 1, 1000000); |
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return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
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} |
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#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ |
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((val) == 255 ? 0 : \ |
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1350000 / ((val) * (div)))) |
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/* for temp */ |
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#define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ |
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: (val)) / 1000, 0, 0xff)) |
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#define TEMP_FROM_REG(val) (((val) & 0x80 ? \ |
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(val) - 0x100 : (val)) * 1000) |
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/* |
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* The analog voltage inputs have 8mV LSB. Since the sysfs output is |
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* in mV as would be measured on the chip input pin, need to just |
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* multiply/divide by 8 to translate from/to register values. |
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*/ |
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#define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) |
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#define IN_FROM_REG(val) ((val) * 8) |
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#define DIV_FROM_REG(val) (1 << (val)) |
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static inline u8 |
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DIV_TO_REG(long val) |
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{ |
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int i; |
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val = clamp_val(val, 1, 128) >> 1; |
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for (i = 0; i < 7; i++) { |
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if (val == 0) |
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break; |
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val >>= 1; |
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} |
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return (u8)i; |
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} |
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struct w83l786ng_data { |
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struct i2c_client *client; |
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struct mutex update_lock; |
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bool valid; /* true if following fields are valid */ |
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unsigned long last_updated; /* In jiffies */ |
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unsigned long last_nonvolatile; /* In jiffies, last time we update the |
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* nonvolatile registers */ |
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u8 in[3]; |
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u8 in_max[3]; |
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u8 in_min[3]; |
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u8 fan[2]; |
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u8 fan_div[2]; |
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u8 fan_min[2]; |
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u8 temp_type[2]; |
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u8 temp[2][3]; |
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u8 pwm[2]; |
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u8 pwm_mode[2]; /* 0->DC variable voltage |
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* 1->PWM variable duty cycle */ |
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u8 pwm_enable[2]; /* 1->manual |
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* 2->thermal cruise (also called SmartFan I) */ |
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u8 tolerance[2]; |
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}; |
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static u8 |
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w83l786ng_read_value(struct i2c_client *client, u8 reg) |
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{ |
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return i2c_smbus_read_byte_data(client, reg); |
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} |
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static int |
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w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) |
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{ |
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return i2c_smbus_write_byte_data(client, reg, value); |
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} |
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static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) |
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{ |
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struct w83l786ng_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int i, j; |
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u8 reg_tmp, pwmcfg; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
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|| !data->valid) { |
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dev_dbg(&client->dev, "Updating w83l786ng data.\n"); |
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/* Update the voltages measured value and limits */ |
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for (i = 0; i < 3; i++) { |
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data->in[i] = w83l786ng_read_value(client, |
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W83L786NG_REG_IN(i)); |
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data->in_min[i] = w83l786ng_read_value(client, |
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W83L786NG_REG_IN_MIN(i)); |
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data->in_max[i] = w83l786ng_read_value(client, |
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W83L786NG_REG_IN_MAX(i)); |
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} |
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/* Update the fan counts and limits */ |
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for (i = 0; i < 2; i++) { |
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data->fan[i] = w83l786ng_read_value(client, |
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W83L786NG_REG_FAN(i)); |
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data->fan_min[i] = w83l786ng_read_value(client, |
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W83L786NG_REG_FAN_MIN(i)); |
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} |
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/* Update the fan divisor */ |
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reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); |
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data->fan_div[0] = reg_tmp & 0x07; |
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data->fan_div[1] = (reg_tmp >> 4) & 0x07; |
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pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
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for (i = 0; i < 2; i++) { |
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data->pwm_mode[i] = |
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((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) |
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? 0 : 1; |
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data->pwm_enable[i] = |
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((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1; |
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data->pwm[i] = |
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(w83l786ng_read_value(client, W83L786NG_REG_PWM[i]) |
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& 0x0f) * 0x11; |
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} |
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/* Update the temperature sensors */ |
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for (i = 0; i < 2; i++) { |
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for (j = 0; j < 3; j++) { |
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data->temp[i][j] = w83l786ng_read_value(client, |
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W83L786NG_REG_TEMP[i][j]); |
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} |
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} |
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/* Update Smart Fan I/II tolerance */ |
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reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); |
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data->tolerance[0] = reg_tmp & 0x0f; |
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data->tolerance[1] = (reg_tmp >> 4) & 0x0f; |
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data->last_updated = jiffies; |
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data->valid = true; |
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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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/* following are the sysfs callback functions */ |
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#define show_in_reg(reg) \ |
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static ssize_t \ |
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show_##reg(struct device *dev, struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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int nr = to_sensor_dev_attr(attr)->index; \ |
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struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
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return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ |
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} |
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show_in_reg(in) |
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show_in_reg(in_min) |
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show_in_reg(in_max) |
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#define store_in_reg(REG, reg) \ |
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static ssize_t \ |
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store_in_##reg(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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int nr = to_sensor_dev_attr(attr)->index; \ |
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struct w83l786ng_data *data = dev_get_drvdata(dev); \ |
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struct i2c_client *client = data->client; \ |
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unsigned long val; \ |
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int err = kstrtoul(buf, 10, &val); \ |
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if (err) \ |
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return err; \ |
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mutex_lock(&data->update_lock); \ |
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data->in_##reg[nr] = IN_TO_REG(val); \ |
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w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ |
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data->in_##reg[nr]); \ |
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mutex_unlock(&data->update_lock); \ |
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return count; \ |
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} |
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store_in_reg(MIN, min) |
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store_in_reg(MAX, max) |
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static struct sensor_device_attribute sda_in_input[] = { |
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SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), |
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SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), |
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SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), |
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}; |
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static struct sensor_device_attribute sda_in_min[] = { |
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SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), |
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SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), |
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SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), |
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}; |
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static struct sensor_device_attribute sda_in_max[] = { |
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SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), |
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SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), |
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SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), |
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}; |
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#define show_fan_reg(reg) \ |
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static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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int nr = to_sensor_dev_attr(attr)->index; \ |
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struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
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return sprintf(buf, "%d\n", \ |
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FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \ |
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} |
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show_fan_reg(fan); |
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show_fan_reg(fan_min); |
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static ssize_t |
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store_fan_min(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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int nr = to_sensor_dev_attr(attr)->index; |
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struct w83l786ng_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
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w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), |
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data->fan_min[nr]); |
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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 |
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show_fan_div(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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int nr = to_sensor_dev_attr(attr)->index; |
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struct w83l786ng_data *data = w83l786ng_update_device(dev); |
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return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); |
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} |
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/* |
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* Note: we save and restore the fan minimum here, because its value is |
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* determined in part by the fan divisor. This follows the principle of |
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* least surprise; the user doesn't expect the fan minimum to change just |
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* because the divisor changed. |
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*/ |
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static ssize_t |
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store_fan_div(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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int nr = to_sensor_dev_attr(attr)->index; |
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struct w83l786ng_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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unsigned long min; |
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u8 tmp_fan_div; |
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u8 fan_div_reg; |
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u8 keep_mask = 0; |
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u8 new_shift = 0; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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/* Save fan_min */ |
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mutex_lock(&data->update_lock); |
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min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); |
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data->fan_div[nr] = DIV_TO_REG(val); |
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switch (nr) { |
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case 0: |
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keep_mask = 0xf8; |
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new_shift = 0; |
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break; |
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case 1: |
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keep_mask = 0x8f; |
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new_shift = 4; |
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break; |
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} |
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fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) |
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& keep_mask; |
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tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; |
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w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, |
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fan_div_reg | tmp_fan_div); |
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/* Restore fan_min */ |
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data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
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w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), |
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data->fan_min[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static struct sensor_device_attribute sda_fan_input[] = { |
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SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), |
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SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), |
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}; |
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static struct sensor_device_attribute sda_fan_min[] = { |
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SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, |
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store_fan_min, 0), |
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SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, |
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store_fan_min, 1), |
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}; |
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static struct sensor_device_attribute sda_fan_div[] = { |
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SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, |
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store_fan_div, 0), |
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SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, |
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store_fan_div, 1), |
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}; |
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/* read/write the temperature, includes measured value and limits */ |
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static ssize_t |
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show_temp(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct sensor_device_attribute_2 *sensor_attr = |
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to_sensor_dev_attr_2(attr); |
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int nr = sensor_attr->nr; |
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int index = sensor_attr->index; |
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struct w83l786ng_data *data = w83l786ng_update_device(dev); |
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); |
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} |
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static ssize_t |
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store_temp(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 sensor_device_attribute_2 *sensor_attr = |
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to_sensor_dev_attr_2(attr); |
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int nr = sensor_attr->nr; |
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int index = sensor_attr->index; |
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struct w83l786ng_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 err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->temp[nr][index] = TEMP_TO_REG(val); |
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w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], |
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data->temp[nr][index]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static struct sensor_device_attribute_2 sda_temp_input[] = { |
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SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), |
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SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), |
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}; |
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static struct sensor_device_attribute_2 sda_temp_max[] = { |
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SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, |
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show_temp, store_temp, 0, 1), |
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SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, |
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show_temp, store_temp, 1, 1), |
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}; |
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static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { |
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SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, |
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show_temp, store_temp, 0, 2), |
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SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, |
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show_temp, store_temp, 1, 2), |
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}; |
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#define show_pwm_reg(reg) \ |
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static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct w83l786ng_data *data = w83l786ng_update_device(dev); \ |
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int nr = to_sensor_dev_attr(attr)->index; \ |
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return sprintf(buf, "%d\n", data->reg[nr]); \ |
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} |
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show_pwm_reg(pwm_mode) |
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show_pwm_reg(pwm_enable) |
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show_pwm_reg(pwm) |
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|
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static ssize_t |
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store_pwm_mode(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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int nr = to_sensor_dev_attr(attr)->index; |
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struct w83l786ng_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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u8 reg; |
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unsigned long val; |
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int err; |
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|
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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|
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if (val > 1) |
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return -EINVAL; |
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mutex_lock(&data->update_lock); |
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data->pwm_mode[nr] = val; |
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reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
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reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); |
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if (!val) |
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reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; |
|
w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static ssize_t |
|
store_pwm(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct w83l786ng_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
unsigned long val; |
|
int err; |
|
|
|
err = kstrtoul(buf, 10, &val); |
|
if (err) |
|
return err; |
|
val = clamp_val(val, 0, 255); |
|
val = DIV_ROUND_CLOSEST(val, 0x11); |
|
|
|
mutex_lock(&data->update_lock); |
|
data->pwm[nr] = val * 0x11; |
|
val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0; |
|
w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static ssize_t |
|
store_pwm_enable(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct w83l786ng_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
u8 reg; |
|
unsigned long val; |
|
int err; |
|
|
|
err = kstrtoul(buf, 10, &val); |
|
if (err) |
|
return err; |
|
|
|
if (!val || val > 2) /* only modes 1 and 2 are supported */ |
|
return -EINVAL; |
|
|
|
mutex_lock(&data->update_lock); |
|
reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); |
|
data->pwm_enable[nr] = val; |
|
reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]); |
|
reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; |
|
w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static struct sensor_device_attribute sda_pwm[] = { |
|
SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), |
|
SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), |
|
}; |
|
|
|
static struct sensor_device_attribute sda_pwm_mode[] = { |
|
SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, |
|
store_pwm_mode, 0), |
|
SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, |
|
store_pwm_mode, 1), |
|
}; |
|
|
|
static struct sensor_device_attribute sda_pwm_enable[] = { |
|
SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, |
|
store_pwm_enable, 0), |
|
SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, |
|
store_pwm_enable, 1), |
|
}; |
|
|
|
/* For Smart Fan I/Thermal Cruise and Smart Fan II */ |
|
static ssize_t |
|
show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct w83l786ng_data *data = w83l786ng_update_device(dev); |
|
return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); |
|
} |
|
|
|
static ssize_t |
|
store_tolerance(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
int nr = to_sensor_dev_attr(attr)->index; |
|
struct w83l786ng_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->client; |
|
u8 tol_tmp, tol_mask; |
|
unsigned long val; |
|
int err; |
|
|
|
err = kstrtoul(buf, 10, &val); |
|
if (err) |
|
return err; |
|
|
|
mutex_lock(&data->update_lock); |
|
tol_mask = w83l786ng_read_value(client, |
|
W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); |
|
tol_tmp = clamp_val(val, 0, 15); |
|
tol_tmp &= 0x0f; |
|
data->tolerance[nr] = tol_tmp; |
|
if (nr == 1) |
|
tol_tmp <<= 4; |
|
|
|
w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, |
|
tol_mask | tol_tmp); |
|
mutex_unlock(&data->update_lock); |
|
return count; |
|
} |
|
|
|
static struct sensor_device_attribute sda_tolerance[] = { |
|
SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, |
|
show_tolerance, store_tolerance, 0), |
|
SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, |
|
show_tolerance, store_tolerance, 1), |
|
}; |
|
|
|
|
|
#define IN_UNIT_ATTRS(X) \ |
|
&sda_in_input[X].dev_attr.attr, \ |
|
&sda_in_min[X].dev_attr.attr, \ |
|
&sda_in_max[X].dev_attr.attr |
|
|
|
#define FAN_UNIT_ATTRS(X) \ |
|
&sda_fan_input[X].dev_attr.attr, \ |
|
&sda_fan_min[X].dev_attr.attr, \ |
|
&sda_fan_div[X].dev_attr.attr |
|
|
|
#define TEMP_UNIT_ATTRS(X) \ |
|
&sda_temp_input[X].dev_attr.attr, \ |
|
&sda_temp_max[X].dev_attr.attr, \ |
|
&sda_temp_max_hyst[X].dev_attr.attr |
|
|
|
#define PWM_UNIT_ATTRS(X) \ |
|
&sda_pwm[X].dev_attr.attr, \ |
|
&sda_pwm_mode[X].dev_attr.attr, \ |
|
&sda_pwm_enable[X].dev_attr.attr |
|
|
|
#define TOLERANCE_UNIT_ATTRS(X) \ |
|
&sda_tolerance[X].dev_attr.attr |
|
|
|
static struct attribute *w83l786ng_attrs[] = { |
|
IN_UNIT_ATTRS(0), |
|
IN_UNIT_ATTRS(1), |
|
IN_UNIT_ATTRS(2), |
|
FAN_UNIT_ATTRS(0), |
|
FAN_UNIT_ATTRS(1), |
|
TEMP_UNIT_ATTRS(0), |
|
TEMP_UNIT_ATTRS(1), |
|
PWM_UNIT_ATTRS(0), |
|
PWM_UNIT_ATTRS(1), |
|
TOLERANCE_UNIT_ATTRS(0), |
|
TOLERANCE_UNIT_ATTRS(1), |
|
NULL |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(w83l786ng); |
|
|
|
static int |
|
w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
u16 man_id; |
|
u8 chip_id; |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
|
return -ENODEV; |
|
|
|
/* Detection */ |
|
if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { |
|
dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", |
|
client->addr); |
|
return -ENODEV; |
|
} |
|
|
|
/* Identification */ |
|
man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + |
|
w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); |
|
chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); |
|
|
|
if (man_id != 0x5CA3 || /* Winbond */ |
|
chip_id != 0x80) { /* W83L786NG */ |
|
dev_dbg(&adapter->dev, |
|
"Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", |
|
man_id, chip_id); |
|
return -ENODEV; |
|
} |
|
|
|
strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
static void w83l786ng_init_client(struct i2c_client *client) |
|
{ |
|
u8 tmp; |
|
|
|
if (reset) |
|
w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); |
|
|
|
/* Start monitoring */ |
|
tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); |
|
if (!(tmp & 0x01)) |
|
w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); |
|
} |
|
|
|
static int |
|
w83l786ng_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct w83l786ng_data *data; |
|
struct device *hwmon_dev; |
|
int i; |
|
u8 reg_tmp; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
mutex_init(&data->update_lock); |
|
|
|
/* Initialize the chip */ |
|
w83l786ng_init_client(client); |
|
|
|
/* A few vars need to be filled upon startup */ |
|
for (i = 0; i < 2; i++) { |
|
data->fan_min[i] = w83l786ng_read_value(client, |
|
W83L786NG_REG_FAN_MIN(i)); |
|
} |
|
|
|
/* Update the fan divisor */ |
|
reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); |
|
data->fan_div[0] = reg_tmp & 0x07; |
|
data->fan_div[1] = (reg_tmp >> 4) & 0x07; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, |
|
w83l786ng_groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct i2c_device_id w83l786ng_id[] = { |
|
{ "w83l786ng", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, w83l786ng_id); |
|
|
|
static struct i2c_driver w83l786ng_driver = { |
|
.class = I2C_CLASS_HWMON, |
|
.driver = { |
|
.name = "w83l786ng", |
|
}, |
|
.probe_new = w83l786ng_probe, |
|
.id_table = w83l786ng_id, |
|
.detect = w83l786ng_detect, |
|
.address_list = normal_i2c, |
|
}; |
|
|
|
module_i2c_driver(w83l786ng_driver); |
|
|
|
MODULE_AUTHOR("Kevin Lo"); |
|
MODULE_DESCRIPTION("w83l786ng driver"); |
|
MODULE_LICENSE("GPL");
|
|
|