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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/hwmon/ina2xx.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for Texas Instruments INA219, INA226 power monitor chips
 *
 * INA219:
 * Zero Drift Bi-Directional Current/Power Monitor with I2C Interface
 * Datasheet: https://www.ti.com/product/ina219
 *
 * INA220:
 * Bi-Directional Current/Power Monitor with I2C Interface
 * Datasheet: https://www.ti.com/product/ina220
 *
 * INA226:
 * Bi-Directional Current/Power Monitor with I2C Interface
 * Datasheet: https://www.ti.com/product/ina226
 *
 * INA230:
 * Bi-directional Current/Power Monitor with I2C Interface
 * Datasheet: https://www.ti.com/product/ina230
 *
 * Copyright (C) 2012 Lothar Felten <lothar.felten@gmail.com>
 * Thanks to Jan Volkering
 */
 
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/delay.h>
#include <linux/util_macros.h>
#include <linux/regmap.h>
 
#include <linux/platform_data/ina2xx.h>
 
/* common register definitions */
#define INA2XX_CONFIG			0x00
#define INA2XX_SHUNT_VOLTAGE		0x01 /* readonly */
#define INA2XX_BUS_VOLTAGE		0x02 /* readonly */
#define INA2XX_POWER			0x03 /* readonly */
#define INA2XX_CURRENT			0x04 /* readonly */
#define INA2XX_CALIBRATION		0x05
 
/* INA226 register definitions */
#define INA226_MASK_ENABLE		0x06
#define INA226_ALERT_LIMIT		0x07
#define INA226_DIE_ID			0xFF
 
/* register count */
#define INA219_REGISTERS		6
#define INA226_REGISTERS		8
 
#define INA2XX_MAX_REGISTERS		8
 
/* settings - depend on use case */
#define INA219_CONFIG_DEFAULT		0x399F	/* PGA=8 */
#define INA226_CONFIG_DEFAULT		0x4527	/* averages=16 */
 
/* worst case is 68.10 ms (~14.6Hz, ina219) */
#define INA2XX_CONVERSION_RATE		15
#define INA2XX_MAX_DELAY		69 /* worst case delay in ms */
 
#define INA2XX_RSHUNT_DEFAULT		10000
 
/* bit mask for reading the averaging setting in the configuration register */
#define INA226_AVG_RD_MASK		0x0E00
 
#define INA226_READ_AVG(reg)		(((reg) & INA226_AVG_RD_MASK) >> 9)
#define INA226_SHIFT_AVG(val)		((val) << 9)
 
/* bit number of alert functions in Mask/Enable Register */
#define INA226_SHUNT_OVER_VOLTAGE_BIT	15
#define INA226_SHUNT_UNDER_VOLTAGE_BIT	14
#define INA226_BUS_OVER_VOLTAGE_BIT	13
#define INA226_BUS_UNDER_VOLTAGE_BIT	12
#define INA226_POWER_OVER_LIMIT_BIT	11
 
/* bit mask for alert config bits of Mask/Enable Register */
#define INA226_ALERT_CONFIG_MASK	0xFC00
#define INA226_ALERT_FUNCTION_FLAG	BIT(4)
 
/* common attrs, ina226 attrs and NULL */
#define INA2XX_MAX_ATTRIBUTE_GROUPS	3
 
/*
 * Both bus voltage and shunt voltage conversion times for ina226 are set
 * to 0b0100 on POR, which translates to 2200 microseconds in total.
 */
#define INA226_TOTAL_CONV_TIME_DEFAULT	2200
 
static struct regmap_config ina2xx_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 16,
};
 
enum ina2xx_ids { ina219, ina226 };
 
struct ina2xx_config {
<------>u16 config_default;
<------>int calibration_value;
<------>int registers;
<------>int shunt_div;
<------>int bus_voltage_shift;
<------>int bus_voltage_lsb;	/* uV */
<------>int power_lsb_factor;
};
 
struct ina2xx_data {
<------>const struct ina2xx_config *config;
 
<------>long rshunt;
<------>long current_lsb_uA;
<------>long power_lsb_uW;
<------>struct mutex config_lock;
<------>struct regmap *regmap;
 
<------>const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS];
};
 
static const struct ina2xx_config ina2xx_config[] = {
<------>[ina219] = {
<------><------>.config_default = INA219_CONFIG_DEFAULT,
<------><------>.calibration_value = 4096,
<------><------>.registers = INA219_REGISTERS,
<------><------>.shunt_div = 100,
<------><------>.bus_voltage_shift = 3,
<------><------>.bus_voltage_lsb = 4000,
<------><------>.power_lsb_factor = 20,
<------>},
<------>[ina226] = {
<------><------>.config_default = INA226_CONFIG_DEFAULT,
<------><------>.calibration_value = 2048,
<------><------>.registers = INA226_REGISTERS,
<------><------>.shunt_div = 400,
<------><------>.bus_voltage_shift = 0,
<------><------>.bus_voltage_lsb = 1250,
<------><------>.power_lsb_factor = 25,
<------>},
};
 
/*
 * Available averaging rates for ina226. The indices correspond with
 * the bit values expected by the chip (according to the ina226 datasheet,
 * table 3 AVG bit settings, found at
 * https://www.ti.com/lit/ds/symlink/ina226.pdf.
 */
static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 };
 
static int ina226_reg_to_interval(u16 config)
{
<------>int avg = ina226_avg_tab[INA226_READ_AVG(config)];
 
<------>/*
<------> * Multiply the total conversion time by the number of averages.
<------> * Return the result in milliseconds.
<------> */
<------>return DIV_ROUND_CLOSEST(avg * INA226_TOTAL_CONV_TIME_DEFAULT, 1000);
}
 
/*
 * Return the new, shifted AVG field value of CONFIG register,
 * to use with regmap_update_bits
 */
static u16 ina226_interval_to_reg(int interval)
{
<------>int avg, avg_bits;
 
<------>avg = DIV_ROUND_CLOSEST(interval * 1000,
<------><------><------><------>INA226_TOTAL_CONV_TIME_DEFAULT);
<------>avg_bits = find_closest(avg, ina226_avg_tab,
<------><------><------><------>ARRAY_SIZE(ina226_avg_tab));
 
<------>return INA226_SHIFT_AVG(avg_bits);
}
 
/*
 * Calibration register is set to the best value, which eliminates
 * truncation errors on calculating current register in hardware.
 * According to datasheet (eq. 3) the best values are 2048 for
 * ina226 and 4096 for ina219. They are hardcoded as calibration_value.
 */
static int ina2xx_calibrate(struct ina2xx_data *data)
{
<------>return regmap_write(data->regmap, INA2XX_CALIBRATION,
<------><------><------>    data->config->calibration_value);
}
 
/*
 * Initialize the configuration and calibration registers.
 */
static int ina2xx_init(struct ina2xx_data *data)
{
<------>int ret = regmap_write(data->regmap, INA2XX_CONFIG,
<------><------><------>       data->config->config_default);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return ina2xx_calibrate(data);
}
 
static int ina2xx_read_reg(struct device *dev, int reg, unsigned int *regval)
{
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>int ret, retry;
 
<------>dev_dbg(dev, "Starting register %d read\n", reg);
 
<------>for (retry = 5; retry; retry--) {
 
<------><------>ret = regmap_read(data->regmap, reg, regval);
<------><------>if (ret < 0)
<------><------><------>return ret;
 
<------><------>dev_dbg(dev, "read %d, val = 0x%04x\n", reg, *regval);
 
<------><------>/*
<------><------> * If the current value in the calibration register is 0, the
<------><------> * power and current registers will also remain at 0. In case
<------><------> * the chip has been reset let's check the calibration
<------><------> * register and reinitialize if needed.
<------><------> * We do that extra read of the calibration register if there
<------><------> * is some hint of a chip reset.
<------><------> */
<------><------>if (*regval == 0) {
<------><------><------>unsigned int cal;
 
<------><------><------>ret = regmap_read(data->regmap, INA2XX_CALIBRATION,
<------><------><------><------><------>  &cal);
<------><------><------>if (ret < 0)
<------><------><------><------>return ret;
 
<------><------><------>if (cal == 0) {
<------><------><------><------>dev_warn(dev, "chip not calibrated, reinitializing\n");
 
<------><------><------><------>ret = ina2xx_init(data);
<------><------><------><------>if (ret < 0)
<------><------><------><------><------>return ret;
<------><------><------><------>/*
<------><------><------><------> * Let's make sure the power and current
<------><------><------><------> * registers have been updated before trying
<------><------><------><------> * again.
<------><------><------><------> */
<------><------><------><------>msleep(INA2XX_MAX_DELAY);
<------><------><------><------>continue;
<------><------><------>}
<------><------>}
<------><------>return 0;
<------>}
 
<------>/*
<------> * If we're here then although all write operations succeeded, the
<------> * chip still returns 0 in the calibration register. Nothing more we
<------> * can do here.
<------> */
<------>dev_err(dev, "unable to reinitialize the chip\n");
<------>return -ENODEV;
}
 
static int ina2xx_get_value(struct ina2xx_data *data, u8 reg,
<------><------><------>    unsigned int regval)
{
<------>int val;
 
<------>switch (reg) {
<------>case INA2XX_SHUNT_VOLTAGE:
<------><------>/* signed register */
<------><------>val = DIV_ROUND_CLOSEST((s16)regval, data->config->shunt_div);
<------><------>break;
<------>case INA2XX_BUS_VOLTAGE:
<------><------>val = (regval >> data->config->bus_voltage_shift)
<------><------>  * data->config->bus_voltage_lsb;
<------><------>val = DIV_ROUND_CLOSEST(val, 1000);
<------><------>break;
<------>case INA2XX_POWER:
<------><------>val = regval * data->power_lsb_uW;
<------><------>break;
<------>case INA2XX_CURRENT:
<------><------>/* signed register, result in mA */
<------><------>val = (s16)regval * data->current_lsb_uA;
<------><------>val = DIV_ROUND_CLOSEST(val, 1000);
<------><------>break;
<------>case INA2XX_CALIBRATION:
<------><------>val = regval;
<------><------>break;
<------>default:
<------><------>/* programmer goofed */
<------><------>WARN_ON_ONCE(1);
<------><------>val = 0;
<------><------>break;
<------>}
 
<------>return val;
}
 
static ssize_t ina2xx_value_show(struct device *dev,
<------><------><------><------> struct device_attribute *da, char *buf)
{
<------>struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>unsigned int regval;
 
<------>int err = ina2xx_read_reg(dev, attr->index, &regval);
 
<------>if (err < 0)
<------><------>return err;
 
<------>return snprintf(buf, PAGE_SIZE, "%d\n",
<------><------><------>ina2xx_get_value(data, attr->index, regval));
}
 
static int ina226_reg_to_alert(struct ina2xx_data *data, u8 bit, u16 regval)
{
<------>int reg;
 
<------>switch (bit) {
<------>case INA226_SHUNT_OVER_VOLTAGE_BIT:
<------>case INA226_SHUNT_UNDER_VOLTAGE_BIT:
<------><------>reg = INA2XX_SHUNT_VOLTAGE;
<------><------>break;
<------>case INA226_BUS_OVER_VOLTAGE_BIT:
<------>case INA226_BUS_UNDER_VOLTAGE_BIT:
<------><------>reg = INA2XX_BUS_VOLTAGE;
<------><------>break;
<------>case INA226_POWER_OVER_LIMIT_BIT:
<------><------>reg = INA2XX_POWER;
<------><------>break;
<------>default:
<------><------>/* programmer goofed */
<------><------>WARN_ON_ONCE(1);
<------><------>return 0;
<------>}
 
<------>return ina2xx_get_value(data, reg, regval);
}
 
/*
 * Turns alert limit values into register values.
 * Opposite of the formula in ina2xx_get_value().
 */
static s16 ina226_alert_to_reg(struct ina2xx_data *data, u8 bit, int val)
{
<------>switch (bit) {
<------>case INA226_SHUNT_OVER_VOLTAGE_BIT:
<------>case INA226_SHUNT_UNDER_VOLTAGE_BIT:
<------><------>val *= data->config->shunt_div;
<------><------>return clamp_val(val, SHRT_MIN, SHRT_MAX);
<------>case INA226_BUS_OVER_VOLTAGE_BIT:
<------>case INA226_BUS_UNDER_VOLTAGE_BIT:
<------><------>val = (val * 1000) << data->config->bus_voltage_shift;
<------><------>val = DIV_ROUND_CLOSEST(val, data->config->bus_voltage_lsb);
<------><------>return clamp_val(val, 0, SHRT_MAX);
<------>case INA226_POWER_OVER_LIMIT_BIT:
<------><------>val = DIV_ROUND_CLOSEST(val, data->power_lsb_uW);
<------><------>return clamp_val(val, 0, USHRT_MAX);
<------>default:
<------><------>/* programmer goofed */
<------><------>WARN_ON_ONCE(1);
<------><------>return 0;
<------>}
}
 
static ssize_t ina226_alert_show(struct device *dev,
<------><------><------><------> struct device_attribute *da, char *buf)
{
<------>struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>int regval;
<------>int val = 0;
<------>int ret;
 
<------>mutex_lock(&data->config_lock);
<------>ret = regmap_read(data->regmap, INA226_MASK_ENABLE, &regval);
<------>if (ret)
<------><------>goto abort;
 
<------>if (regval & BIT(attr->index)) {
<------><------>ret = regmap_read(data->regmap, INA226_ALERT_LIMIT, &regval);
<------><------>if (ret)
<------><------><------>goto abort;
<------><------>val = ina226_reg_to_alert(data, attr->index, regval);
<------>}
 
<------>ret = snprintf(buf, PAGE_SIZE, "%d\n", val);
abort:
<------>mutex_unlock(&data->config_lock);
<------>return ret;
}
 
static ssize_t ina226_alert_store(struct device *dev,
<------><------><------><------>  struct device_attribute *da,
<------><------><------><------>  const char *buf, size_t count)
{
<------>struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>unsigned long val;
<------>int ret;
 
<------>ret = kstrtoul(buf, 10, &val);
<------>if (ret < 0)
<------><------>return ret;
 
<------>/*
<------> * Clear all alerts first to avoid accidentally triggering ALERT pin
<------> * due to register write sequence. Then, only enable the alert
<------> * if the value is non-zero.
<------> */
<------>mutex_lock(&data->config_lock);
<------>ret = regmap_update_bits(data->regmap, INA226_MASK_ENABLE,
<------><------><------><------> INA226_ALERT_CONFIG_MASK, 0);
<------>if (ret < 0)
<------><------>goto abort;
 
<------>ret = regmap_write(data->regmap, INA226_ALERT_LIMIT,
<------><------><------>   ina226_alert_to_reg(data, attr->index, val));
<------>if (ret < 0)
<------><------>goto abort;
 
<------>if (val != 0) {
<------><------>ret = regmap_update_bits(data->regmap, INA226_MASK_ENABLE,
<------><------><------><------><------> INA226_ALERT_CONFIG_MASK,
<------><------><------><------><------> BIT(attr->index));
<------><------>if (ret < 0)
<------><------><------>goto abort;
<------>}
 
<------>ret = count;
abort:
<------>mutex_unlock(&data->config_lock);
<------>return ret;
}
 
static ssize_t ina226_alarm_show(struct device *dev,
<------><------><------><------> struct device_attribute *da, char *buf)
{
<------>struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>int regval;
<------>int alarm = 0;
<------>int ret;
 
<------>ret = regmap_read(data->regmap, INA226_MASK_ENABLE, &regval);
<------>if (ret)
<------><------>return ret;
 
<------>alarm = (regval & BIT(attr->index)) &&
<------><------>(regval & INA226_ALERT_FUNCTION_FLAG);
<------>return snprintf(buf, PAGE_SIZE, "%d\n", alarm);
}
 
/*
 * In order to keep calibration register value fixed, the product
 * of current_lsb and shunt_resistor should also be fixed and equal
 * to shunt_voltage_lsb = 1 / shunt_div multiplied by 10^9 in order
 * to keep the scale.
 */
static int ina2xx_set_shunt(struct ina2xx_data *data, long val)
{
<------>unsigned int dividend = DIV_ROUND_CLOSEST(1000000000,
<------><------><------><------><------><------>  data->config->shunt_div);
<------>if (val <= 0 || val > dividend)
<------><------>return -EINVAL;
 
<------>mutex_lock(&data->config_lock);
<------>data->rshunt = val;
<------>data->current_lsb_uA = DIV_ROUND_CLOSEST(dividend, val);
<------>data->power_lsb_uW = data->config->power_lsb_factor *
<------><------><------>     data->current_lsb_uA;
<------>mutex_unlock(&data->config_lock);
 
<------>return 0;
}
 
static ssize_t ina2xx_shunt_show(struct device *dev,
<------><------><------><------> struct device_attribute *da, char *buf)
{
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
 
<------>return snprintf(buf, PAGE_SIZE, "%li\n", data->rshunt);
}
 
static ssize_t ina2xx_shunt_store(struct device *dev,
<------><------><------><------>  struct device_attribute *da,
<------><------><------><------>  const char *buf, size_t count)
{
<------>unsigned long val;
<------>int status;
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
 
<------>status = kstrtoul(buf, 10, &val);
<------>if (status < 0)
<------><------>return status;
 
<------>status = ina2xx_set_shunt(data, val);
<------>if (status < 0)
<------><------>return status;
<------>return count;
}
 
static ssize_t ina226_interval_store(struct device *dev,
<------><------><------><------>     struct device_attribute *da,
<------><------><------><------>     const char *buf, size_t count)
{
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>unsigned long val;
<------>int status;
 
<------>status = kstrtoul(buf, 10, &val);
<------>if (status < 0)
<------><------>return status;
 
<------>if (val > INT_MAX || val == 0)
<------><------>return -EINVAL;
 
<------>status = regmap_update_bits(data->regmap, INA2XX_CONFIG,
<------><------><------><------>    INA226_AVG_RD_MASK,
<------><------><------><------>    ina226_interval_to_reg(val));
<------>if (status < 0)
<------><------>return status;
 
<------>return count;
}
 
static ssize_t ina226_interval_show(struct device *dev,
<------><------><------><------>    struct device_attribute *da, char *buf)
{
<------>struct ina2xx_data *data = dev_get_drvdata(dev);
<------>int status;
<------>unsigned int regval;
 
<------>status = regmap_read(data->regmap, INA2XX_CONFIG, &regval);
<------>if (status)
<------><------>return status;
 
<------>return snprintf(buf, PAGE_SIZE, "%d\n", ina226_reg_to_interval(regval));
}
 
/* shunt voltage */
static SENSOR_DEVICE_ATTR_RO(in0_input, ina2xx_value, INA2XX_SHUNT_VOLTAGE);
/* shunt voltage over/under voltage alert setting and alarm */
static SENSOR_DEVICE_ATTR_RW(in0_crit, ina226_alert,
<------><------><------>     INA226_SHUNT_OVER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RW(in0_lcrit, ina226_alert,
<------><------><------>     INA226_SHUNT_UNDER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RO(in0_crit_alarm, ina226_alarm,
<------><------><------>     INA226_SHUNT_OVER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RO(in0_lcrit_alarm, ina226_alarm,
<------><------><------>     INA226_SHUNT_UNDER_VOLTAGE_BIT);
 
/* bus voltage */
static SENSOR_DEVICE_ATTR_RO(in1_input, ina2xx_value, INA2XX_BUS_VOLTAGE);
/* bus voltage over/under voltage alert setting and alarm */
static SENSOR_DEVICE_ATTR_RW(in1_crit, ina226_alert,
<------><------><------>     INA226_BUS_OVER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RW(in1_lcrit, ina226_alert,
<------><------><------>     INA226_BUS_UNDER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RO(in1_crit_alarm, ina226_alarm,
<------><------><------>     INA226_BUS_OVER_VOLTAGE_BIT);
static SENSOR_DEVICE_ATTR_RO(in1_lcrit_alarm, ina226_alarm,
<------><------><------>     INA226_BUS_UNDER_VOLTAGE_BIT);
 
/* calculated current */
static SENSOR_DEVICE_ATTR_RO(curr1_input, ina2xx_value, INA2XX_CURRENT);
 
/* calculated power */
static SENSOR_DEVICE_ATTR_RO(power1_input, ina2xx_value, INA2XX_POWER);
/* over-limit power alert setting and alarm */
static SENSOR_DEVICE_ATTR_RW(power1_crit, ina226_alert,
<------><------><------>     INA226_POWER_OVER_LIMIT_BIT);
static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina226_alarm,
<------><------><------>     INA226_POWER_OVER_LIMIT_BIT);
 
/* shunt resistance */
static SENSOR_DEVICE_ATTR_RW(shunt_resistor, ina2xx_shunt, INA2XX_CALIBRATION);
 
/* update interval (ina226 only) */
static SENSOR_DEVICE_ATTR_RW(update_interval, ina226_interval, 0);
 
/* pointers to created device attributes */
static struct attribute *ina2xx_attrs[] = {
<------>&sensor_dev_attr_in0_input.dev_attr.attr,
<------>&sensor_dev_attr_in1_input.dev_attr.attr,
<------>&sensor_dev_attr_curr1_input.dev_attr.attr,
<------>&sensor_dev_attr_power1_input.dev_attr.attr,
<------>&sensor_dev_attr_shunt_resistor.dev_attr.attr,
<------>NULL,
};
 
static const struct attribute_group ina2xx_group = {
<------>.attrs = ina2xx_attrs,
};
 
static struct attribute *ina226_attrs[] = {
<------>&sensor_dev_attr_in0_crit.dev_attr.attr,
<------>&sensor_dev_attr_in0_lcrit.dev_attr.attr,
<------>&sensor_dev_attr_in0_crit_alarm.dev_attr.attr,
<------>&sensor_dev_attr_in0_lcrit_alarm.dev_attr.attr,
<------>&sensor_dev_attr_in1_crit.dev_attr.attr,
<------>&sensor_dev_attr_in1_lcrit.dev_attr.attr,
<------>&sensor_dev_attr_in1_crit_alarm.dev_attr.attr,
<------>&sensor_dev_attr_in1_lcrit_alarm.dev_attr.attr,
<------>&sensor_dev_attr_power1_crit.dev_attr.attr,
<------>&sensor_dev_attr_power1_crit_alarm.dev_attr.attr,
<------>&sensor_dev_attr_update_interval.dev_attr.attr,
<------>NULL,
};
 
static const struct attribute_group ina226_group = {
<------>.attrs = ina226_attrs,
};
 
static const struct i2c_device_id ina2xx_id[];
 
static int ina2xx_probe(struct i2c_client *client)
{
<------>struct device *dev = &client->dev;
<------>struct ina2xx_data *data;
<------>struct device *hwmon_dev;
<------>u32 val;
<------>int ret, group = 0;
<------>enum ina2xx_ids chip;
 
<------>if (client->dev.of_node)
<------><------>chip = (enum ina2xx_ids)of_device_get_match_data(&client->dev);
<------>else
<------><------>chip = i2c_match_id(ina2xx_id, client)->driver_data;
 
<------>data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
<------>if (!data)
<------><------>return -ENOMEM;
 
<------>/* set the device type */
<------>data->config = &ina2xx_config[chip];
<------>mutex_init(&data->config_lock);
 
<------>if (of_property_read_u32(dev->of_node, "shunt-resistor", &val) < 0) {
<------><------>struct ina2xx_platform_data *pdata = dev_get_platdata(dev);
 
<------><------>if (pdata)
<------><------><------>val = pdata->shunt_uohms;
<------><------>else
<------><------><------>val = INA2XX_RSHUNT_DEFAULT;
<------>}
 
<------>ina2xx_set_shunt(data, val);
 
<------>ina2xx_regmap_config.max_register = data->config->registers;
 
<------>data->regmap = devm_regmap_init_i2c(client, &ina2xx_regmap_config);
<------>if (IS_ERR(data->regmap)) {
<------><------>dev_err(dev, "failed to allocate register map\n");
<------><------>return PTR_ERR(data->regmap);
<------>}
 
<------>ret = ina2xx_init(data);
<------>if (ret < 0) {
<------><------>dev_err(dev, "error configuring the device: %d\n", ret);
<------><------>return -ENODEV;
<------>}
 
<------>data->groups[group++] = &ina2xx_group;
<------>if (chip == ina226)
<------><------>data->groups[group++] = &ina226_group;
 
<------>hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
<------><------><------><------><------><------><------>   data, data->groups);
<------>if (IS_ERR(hwmon_dev))
<------><------>return PTR_ERR(hwmon_dev);
 
<------>dev_info(dev, "power monitor %s (Rshunt = %li uOhm)\n",
<------><------> client->name, data->rshunt);
 
<------>return 0;
}
 
static const struct i2c_device_id ina2xx_id[] = {
<------>{ "ina219", ina219 },
<------>{ "ina220", ina219 },
<------>{ "ina226", ina226 },
<------>{ "ina230", ina226 },
<------>{ "ina231", ina226 },
<------>{ }
};
MODULE_DEVICE_TABLE(i2c, ina2xx_id);
 
static const struct of_device_id __maybe_unused ina2xx_of_match[] = {
<------>{
<------><------>.compatible = "ti,ina219",
<------><------>.data = (void *)ina219
<------>},
<------>{
<------><------>.compatible = "ti,ina220",
<------><------>.data = (void *)ina219
<------>},
<------>{
<------><------>.compatible = "ti,ina226",
<------><------>.data = (void *)ina226
<------>},
<------>{
<------><------>.compatible = "ti,ina230",
<------><------>.data = (void *)ina226
<------>},
<------>{
<------><------>.compatible = "ti,ina231",
<------><------>.data = (void *)ina226
<------>},
<------>{ },
};
MODULE_DEVICE_TABLE(of, ina2xx_of_match);
 
static struct i2c_driver ina2xx_driver = {
<------>.driver = {
<------><------>.name	= "ina2xx",
<------><------>.of_match_table = of_match_ptr(ina2xx_of_match),
<------>},
<------>.probe_new	= ina2xx_probe,
<------>.id_table	= ina2xx_id,
};
 
module_i2c_driver(ina2xx_driver);
 
MODULE_AUTHOR("Lothar Felten <l-felten@ti.com>");
MODULE_DESCRIPTION("ina2xx driver");
MODULE_LICENSE("GPL");
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