// SPDX-License-Identifier: GPL-2.0-or-later /* * emc2103.c - Support for SMSC EMC2103 * Copyright (c) 2010 SMSC */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> /* Addresses scanned */ static const unsigned short normal_i2c[] = …; static const u8 REG_TEMP[4] = …; static const u8 REG_TEMP_MIN[4] = …; static const u8 REG_TEMP_MAX[4] = …; #define REG_CONF1 … #define REG_TEMP_MAX_ALARM … #define REG_TEMP_MIN_ALARM … #define REG_FAN_CONF1 … #define REG_FAN_TARGET_LO … #define REG_FAN_TARGET_HI … #define REG_FAN_TACH_HI … #define REG_FAN_TACH_LO … #define REG_PRODUCT_ID … #define REG_MFG_ID … /* equation 4 from datasheet: rpm = (3932160 * multipler) / count */ #define FAN_RPM_FACTOR … /* * 2103-2 and 2103-4's 3rd temperature sensor can be connected to two diodes * in anti-parallel mode, and in this configuration both can be read * independently (so we have 4 temperature inputs). The device can't * detect if it's connected in this mode, so we have to manually enable * it. Default is to leave the device in the state it's already in (-1). * This parameter allows APD mode to be optionally forced on or off */ static int apd = …; module_param(apd, bint, 0); MODULE_PARM_DESC(…) …; struct temperature { … }; struct emc2103_data { … }; static int read_u8_from_i2c(struct i2c_client *client, u8 i2c_reg, u8 *output) { … } static void read_temp_from_i2c(struct i2c_client *client, u8 i2c_reg, struct temperature *temp) { … } static void read_fan_from_i2c(struct i2c_client *client, u16 *output, u8 hi_addr, u8 lo_addr) { … } static void write_fan_target_to_i2c(struct i2c_client *client, u16 new_target) { … } static void read_fan_config_from_i2c(struct i2c_client *client) { … } static struct emc2103_data *emc2103_update_device(struct device *dev) { … } static ssize_t temp_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_min_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_max_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_fault_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_min_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_max_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t temp_min_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t temp_max_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t fan1_input_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t fan1_div_show(struct device *dev, struct device_attribute *da, char *buf) { … } /* * Note: we also update the fan target here, because its value is * determined in part by the fan clock divider. This follows the principle * of least surprise; the user doesn't expect the fan target to change just * because the divider changed. */ static ssize_t fan1_div_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t fan1_target_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t fan1_target_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t fan1_fault_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pwm1_enable_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t pwm1_enable_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0); static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0); static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1); static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1); static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1); static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2); static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2); static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2); static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3); static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3); static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, temp_min_alarm, 3); static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, temp_max_alarm, 3); static DEVICE_ATTR_RO(fan1_input); static DEVICE_ATTR_RW(fan1_div); static DEVICE_ATTR_RW(fan1_target); static DEVICE_ATTR_RO(fan1_fault); static DEVICE_ATTR_RW(pwm1_enable); /* sensors present on all models */ static struct attribute *emc2103_attributes[] = …; /* extra temperature sensors only present on 2103-2 and 2103-4 */ static struct attribute *emc2103_attributes_temp3[] = …; /* extra temperature sensors only present on 2103-2 and 2103-4 in APD mode */ static struct attribute *emc2103_attributes_temp4[] = …; static const struct attribute_group emc2103_group = …; static const struct attribute_group emc2103_temp3_group = …; static const struct attribute_group emc2103_temp4_group = …; static int emc2103_probe(struct i2c_client *client) { … } static const struct i2c_device_id emc2103_ids[] = …; MODULE_DEVICE_TABLE(i2c, emc2103_ids); /* Return 0 if detection is successful, -ENODEV otherwise */ static int emc2103_detect(struct i2c_client *new_client, struct i2c_board_info *info) { … } static struct i2c_driver emc2103_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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