// SPDX-License-Identifier: GPL-2.0-only /* * Driver for the Texas Instruments / Burr Brown INA209 * Bidirectional Current/Power Monitor * * Copyright (C) 2012 Guenter Roeck <[email protected]> * * Derived from Ira W. Snyder's original driver submission * Copyright (C) 2008 Paul Hays <[email protected]> * Copyright (C) 2008-2009 Ira W. Snyder <[email protected]> * * Aligned with ina2xx driver * Copyright (C) 2012 Lothar Felten <[email protected]> * Thanks to Jan Volkering * * Datasheet: * https://www.ti.com/lit/gpn/ina209 */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/bug.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/platform_data/ina2xx.h> /* register definitions */ #define INA209_CONFIGURATION … #define INA209_STATUS … #define INA209_STATUS_MASK … #define INA209_SHUNT_VOLTAGE … #define INA209_BUS_VOLTAGE … #define INA209_POWER … #define INA209_CURRENT … #define INA209_SHUNT_VOLTAGE_POS_PEAK … #define INA209_SHUNT_VOLTAGE_NEG_PEAK … #define INA209_BUS_VOLTAGE_MAX_PEAK … #define INA209_BUS_VOLTAGE_MIN_PEAK … #define INA209_POWER_PEAK … #define INA209_SHUNT_VOLTAGE_POS_WARN … #define INA209_SHUNT_VOLTAGE_NEG_WARN … #define INA209_POWER_WARN … #define INA209_BUS_VOLTAGE_OVER_WARN … #define INA209_BUS_VOLTAGE_UNDER_WARN … #define INA209_POWER_OVER_LIMIT … #define INA209_BUS_VOLTAGE_OVER_LIMIT … #define INA209_BUS_VOLTAGE_UNDER_LIMIT … #define INA209_CRITICAL_DAC_POS … #define INA209_CRITICAL_DAC_NEG … #define INA209_CALIBRATION … #define INA209_REGISTERS … #define INA209_CONFIG_DEFAULT … #define INA209_SHUNT_DEFAULT … struct ina209_data { … }; static struct ina209_data *ina209_update_device(struct device *dev) { … } /* * Read a value from a device register and convert it to the * appropriate sysfs units */ static long ina209_from_reg(const u8 reg, const u16 val) { … } /* * Take a value and convert it to register format, clamping the value * to the appropriate range. */ static int ina209_to_reg(u8 reg, u16 old, long val) { … } static int ina209_interval_from_reg(u16 reg) { … } static u16 ina209_reg_from_interval(u16 config, long interval) { … } static ssize_t ina209_interval_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t ina209_interval_show(struct device *dev, struct device_attribute *da, char *buf) { … } /* * History is reset by writing 1 into bit 0 of the respective peak register. * Since more than one peak register may be affected by the scope of a * reset_history attribute write, use a bit mask in attr->index to identify * which registers are affected. */ static u16 ina209_reset_history_regs[] = …; static ssize_t ina209_history_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t ina209_value_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t ina209_value_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t ina209_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { … } /* Shunt voltage, history, limits, alarms */ static SENSOR_DEVICE_ATTR_RO(in0_input, ina209_value, INA209_SHUNT_VOLTAGE); static SENSOR_DEVICE_ATTR_RO(in0_input_highest, ina209_value, INA209_SHUNT_VOLTAGE_POS_PEAK); static SENSOR_DEVICE_ATTR_RO(in0_input_lowest, ina209_value, INA209_SHUNT_VOLTAGE_NEG_PEAK); static SENSOR_DEVICE_ATTR_WO(in0_reset_history, ina209_history, (1 << 0) | (1 << 1)); static SENSOR_DEVICE_ATTR_RW(in0_max, ina209_value, INA209_SHUNT_VOLTAGE_POS_WARN); static SENSOR_DEVICE_ATTR_RW(in0_min, ina209_value, INA209_SHUNT_VOLTAGE_NEG_WARN); static SENSOR_DEVICE_ATTR_RW(in0_crit_max, ina209_value, INA209_CRITICAL_DAC_POS); static SENSOR_DEVICE_ATTR_RW(in0_crit_min, ina209_value, INA209_CRITICAL_DAC_NEG); static SENSOR_DEVICE_ATTR_RO(in0_min_alarm, ina209_alarm, 1 << 11); static SENSOR_DEVICE_ATTR_RO(in0_max_alarm, ina209_alarm, 1 << 12); static SENSOR_DEVICE_ATTR_RO(in0_crit_min_alarm, ina209_alarm, 1 << 6); static SENSOR_DEVICE_ATTR_RO(in0_crit_max_alarm, ina209_alarm, 1 << 7); /* Bus voltage, history, limits, alarms */ static SENSOR_DEVICE_ATTR_RO(in1_input, ina209_value, INA209_BUS_VOLTAGE); static SENSOR_DEVICE_ATTR_RO(in1_input_highest, ina209_value, INA209_BUS_VOLTAGE_MAX_PEAK); static SENSOR_DEVICE_ATTR_RO(in1_input_lowest, ina209_value, INA209_BUS_VOLTAGE_MIN_PEAK); static SENSOR_DEVICE_ATTR_WO(in1_reset_history, ina209_history, (1 << 2) | (1 << 3)); static SENSOR_DEVICE_ATTR_RW(in1_max, ina209_value, INA209_BUS_VOLTAGE_OVER_WARN); static SENSOR_DEVICE_ATTR_RW(in1_min, ina209_value, INA209_BUS_VOLTAGE_UNDER_WARN); static SENSOR_DEVICE_ATTR_RW(in1_crit_max, ina209_value, INA209_BUS_VOLTAGE_OVER_LIMIT); static SENSOR_DEVICE_ATTR_RW(in1_crit_min, ina209_value, INA209_BUS_VOLTAGE_UNDER_LIMIT); static SENSOR_DEVICE_ATTR_RO(in1_min_alarm, ina209_alarm, 1 << 14); static SENSOR_DEVICE_ATTR_RO(in1_max_alarm, ina209_alarm, 1 << 15); static SENSOR_DEVICE_ATTR_RO(in1_crit_min_alarm, ina209_alarm, 1 << 9); static SENSOR_DEVICE_ATTR_RO(in1_crit_max_alarm, ina209_alarm, 1 << 10); /* Power */ static SENSOR_DEVICE_ATTR_RO(power1_input, ina209_value, INA209_POWER); static SENSOR_DEVICE_ATTR_RO(power1_input_highest, ina209_value, INA209_POWER_PEAK); static SENSOR_DEVICE_ATTR_WO(power1_reset_history, ina209_history, 1 << 4); static SENSOR_DEVICE_ATTR_RW(power1_max, ina209_value, INA209_POWER_WARN); static SENSOR_DEVICE_ATTR_RW(power1_crit, ina209_value, INA209_POWER_OVER_LIMIT); static SENSOR_DEVICE_ATTR_RO(power1_max_alarm, ina209_alarm, 1 << 13); static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina209_alarm, 1 << 8); /* Current */ static SENSOR_DEVICE_ATTR_RO(curr1_input, ina209_value, INA209_CURRENT); static SENSOR_DEVICE_ATTR_RW(update_interval, ina209_interval, 0); /* * Finally, construct an array of pointers to members of the above objects, * as required for sysfs_create_group() */ static struct attribute *ina209_attrs[] = …; ATTRIBUTE_GROUPS(…); static void ina209_restore_conf(struct i2c_client *client, struct ina209_data *data) { … } static int ina209_init_client(struct i2c_client *client, struct ina209_data *data) { … } static int ina209_probe(struct i2c_client *client) { … } static void ina209_remove(struct i2c_client *client) { … } static const struct i2c_device_id ina209_id[] = …; MODULE_DEVICE_TABLE(i2c, ina209_id); static const struct of_device_id __maybe_unused ina209_of_match[] = …; MODULE_DEVICE_TABLE(of, ina209_of_match); /* This is the driver that will be inserted */ static struct i2c_driver ina209_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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