// SPDX-License-Identifier: GPL-2.0-only /* * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) * * Copyright (C) 2008, 2010 Pengutronix * * TODO: SPI, use power-down mode for suspend?, interrupt handling? */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/slab.h> #define ADT7411_REG_STAT_1 … #define ADT7411_STAT_1_INT_TEMP_HIGH … #define ADT7411_STAT_1_INT_TEMP_LOW … #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 … #define ADT7411_STAT_1_EXT_TEMP_LOW … #define ADT7411_STAT_1_EXT_TEMP_FAULT … #define ADT7411_STAT_1_AIN2 … #define ADT7411_STAT_1_AIN3 … #define ADT7411_STAT_1_AIN4 … #define ADT7411_REG_STAT_2 … #define ADT7411_STAT_2_AIN5 … #define ADT7411_STAT_2_AIN6 … #define ADT7411_STAT_2_AIN7 … #define ADT7411_STAT_2_AIN8 … #define ADT7411_STAT_2_VDD … #define ADT7411_REG_INT_TEMP_VDD_LSB … #define ADT7411_REG_EXT_TEMP_AIN14_LSB … #define ADT7411_REG_VDD_MSB … #define ADT7411_REG_INT_TEMP_MSB … #define ADT7411_REG_EXT_TEMP_AIN1_MSB … #define ADT7411_REG_CFG1 … #define ADT7411_CFG1_START_MONITOR … #define ADT7411_CFG1_RESERVED_BIT1 … #define ADT7411_CFG1_EXT_TDM … #define ADT7411_CFG1_RESERVED_BIT3 … #define ADT7411_REG_CFG2 … #define ADT7411_CFG2_DISABLE_AVG … #define ADT7411_REG_CFG3 … #define ADT7411_CFG3_ADC_CLK_225 … #define ADT7411_CFG3_RESERVED_BIT1 … #define ADT7411_CFG3_RESERVED_BIT2 … #define ADT7411_CFG3_RESERVED_BIT3 … #define ADT7411_CFG3_REF_VDD … #define ADT7411_REG_VDD_HIGH … #define ADT7411_REG_VDD_LOW … #define ADT7411_REG_TEMP_HIGH(nr) … #define ADT7411_REG_TEMP_LOW(nr) … #define ADT7411_REG_IN_HIGH(nr) … #define ADT7411_REG_IN_LOW(nr) … #define ADT7411_REG_DEVICE_ID … #define ADT7411_REG_MANUFACTURER_ID … #define ADT7411_DEVICE_ID … #define ADT7411_MANUFACTURER_ID … static const unsigned short normal_i2c[] = …; static const u8 adt7411_in_alarm_reg[] = …; static const u8 adt7411_in_alarm_bits[] = …; struct adt7411_data { … }; /* * When reading a register containing (up to 4) lsb, all associated * msb-registers get locked by the hardware. After _one_ of those msb is read, * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb * is protected here with a mutex, too. */ static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, u8 msb_reg, u8 lsb_shift) { … } static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, bool flag) { … } static ssize_t adt7411_show_bit(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t adt7411_set_bit(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } #define ADT7411_BIT_ATTR(__name, __reg, __bit) … static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); static struct attribute *adt7411_attrs[] = …; ATTRIBUTE_GROUPS(…); static int adt7411_read_in_alarm(struct device *dev, int channel, long *val) { … } static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) { … } static int adt7411_update_vref(struct device *dev) { … } static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7411_read_in(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7411_read_temp(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val) { … } static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel, long val) { … } static int adt7411_write_in(struct device *dev, u32 attr, int channel, long val) { … } static int adt7411_write_temp(struct device *dev, u32 attr, int channel, long val) { … } static int adt7411_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t adt7411_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static int adt7411_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int adt7411_init_device(struct adt7411_data *data) { … } static const struct hwmon_channel_info * const adt7411_info[] = …; static const struct hwmon_ops adt7411_hwmon_ops = …; static const struct hwmon_chip_info adt7411_chip_info = …; static int adt7411_probe(struct i2c_client *client) { … } static const struct i2c_device_id adt7411_id[] = …; MODULE_DEVICE_TABLE(i2c, adt7411_id); static struct i2c_driver adt7411_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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