Release 4.11 drivers/hwmon/ina209.c

Directory: drivers/hwmon
/*
 * Driver for the Texas Instruments / Burr Brown INA209
 * Bidirectional Current/Power Monitor
 *
 * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net>
 *
 * Derived from Ira W. Snyder's original driver submission
 *      Copyright (C) 2008 Paul Hays <Paul.Hays@cattail.ca>
 *      Copyright (C) 2008-2009 Ira W. Snyder <iws@ovro.caltech.edu>
 *
 * Aligned with ina2xx driver
 *      Copyright (C) 2012 Lothar Felten <l-felten@ti.com>
 *      Thanks to Jan Volkering
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * Datasheet:
 * http://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		0x00

#define INA209_STATUS			0x01

#define INA209_STATUS_MASK		0x02

#define INA209_SHUNT_VOLTAGE		0x03

#define INA209_BUS_VOLTAGE		0x04

#define INA209_POWER			0x05

#define INA209_CURRENT			0x06

#define INA209_SHUNT_VOLTAGE_POS_PEAK	0x07

#define INA209_SHUNT_VOLTAGE_NEG_PEAK	0x08

#define INA209_BUS_VOLTAGE_MAX_PEAK	0x09

#define INA209_BUS_VOLTAGE_MIN_PEAK	0x0a

#define INA209_POWER_PEAK		0x0b

#define INA209_SHUNT_VOLTAGE_POS_WARN	0x0c

#define INA209_SHUNT_VOLTAGE_NEG_WARN	0x0d

#define INA209_POWER_WARN		0x0e

#define INA209_BUS_VOLTAGE_OVER_WARN	0x0f

#define INA209_BUS_VOLTAGE_UNDER_WARN	0x10

#define INA209_POWER_OVER_LIMIT		0x11

#define INA209_BUS_VOLTAGE_OVER_LIMIT	0x12

#define INA209_BUS_VOLTAGE_UNDER_LIMIT	0x13

#define INA209_CRITICAL_DAC_POS		0x14

#define INA209_CRITICAL_DAC_NEG		0x15

#define INA209_CALIBRATION		0x16


#define INA209_REGISTERS		0x17


#define INA209_CONFIG_DEFAULT		0x3c47	
/* PGA=8, full range */

#define INA209_SHUNT_DEFAULT		10000	
/* uOhm */


struct ina209_data {
	
struct i2c_client *client;

	
struct mutex update_lock;
	
bool valid;
	
unsigned long last_updated;	/* in jiffies */

	
u16 regs[INA209_REGISTERS];	/* All chip registers */

	
u16 config_orig;		/* Original configuration */
	
u16 calibration_orig;		/* Original calibration */
	
u16 update_interval;
};



static struct ina209_data *ina209_update_device(struct device *dev)
{
	struct ina209_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	struct ina209_data *ret = data;
	s32 val;
	int i;

	mutex_lock(&data->update_lock);

	if (!data->valid ||
	    time_after(jiffies, data->last_updated + data->update_interval)) {
		for (i = 0; i < ARRAY_SIZE(data->regs); i++) {
			val = i2c_smbus_read_word_swapped(client, i);
			if (val < 0) {
				ret = ERR_PTR(val);
				goto abort;
			}
			data->regs[i] = val;
		}
		data->last_updated = jiffies;
		data->valid = true;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 156 100.00% 2 100.00%
Total 156 100.00% 2 100.00%

/*
 * 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)
{
	switch (reg) {
	case INA209_SHUNT_VOLTAGE:
	case INA209_SHUNT_VOLTAGE_POS_PEAK:
	case INA209_SHUNT_VOLTAGE_NEG_PEAK:
	case INA209_SHUNT_VOLTAGE_POS_WARN:
	case INA209_SHUNT_VOLTAGE_NEG_WARN:
		/* LSB=10 uV. Convert to mV. */
		return DIV_ROUND_CLOSEST(val, 100);

	case INA209_BUS_VOLTAGE:
	case INA209_BUS_VOLTAGE_MAX_PEAK:
	case INA209_BUS_VOLTAGE_MIN_PEAK:
	case INA209_BUS_VOLTAGE_OVER_WARN:
	case INA209_BUS_VOLTAGE_UNDER_WARN:
	case INA209_BUS_VOLTAGE_OVER_LIMIT:
	case INA209_BUS_VOLTAGE_UNDER_LIMIT:
		/* LSB=4 mV, last 3 bits unused */
		return (val >> 3) * 4;

	case INA209_CRITICAL_DAC_POS:
		/* LSB=1 mV, in the upper 8 bits */
		return val >> 8;

	case INA209_CRITICAL_DAC_NEG:
		/* LSB=1 mV, in the upper 8 bits */
		return -1 * (val >> 8);

	case INA209_POWER:
	case INA209_POWER_PEAK:
	case INA209_POWER_WARN:
	case INA209_POWER_OVER_LIMIT:
		/* LSB=20 mW. Convert to uW */
		return val * 20 * 1000L;

	case INA209_CURRENT:
		/* LSB=1 mA (selected). Is in mA */
		return val;
	}

	/* programmer goofed */
	WARN_ON_ONCE(1);
	return 0;
}

Contributors
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Guenter Roeck 134 100.00% 1 100.00%
Total 134 100.00% 1 100.00%

/*
 * 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)
{
	switch (reg) {
	case INA209_SHUNT_VOLTAGE_POS_WARN:
	case INA209_SHUNT_VOLTAGE_NEG_WARN:
		/* Limit to +- 320 mV, 10 uV LSB */
		return clamp_val(val, -320, 320) * 100;

	case INA209_BUS_VOLTAGE_OVER_WARN:
	case INA209_BUS_VOLTAGE_UNDER_WARN:
	case INA209_BUS_VOLTAGE_OVER_LIMIT:
	case INA209_BUS_VOLTAGE_UNDER_LIMIT:
		/*
                 * Limit to 0-32000 mV, 4 mV LSB
                 *
                 * The last three bits aren't part of the value, but we'll
                 * preserve them in their original state.
                 */
		return (DIV_ROUND_CLOSEST(clamp_val(val, 0, 32000), 4) << 3)
		  | (old & 0x7);

	case INA209_CRITICAL_DAC_NEG:
		/*
                 * Limit to -255-0 mV, 1 mV LSB
                 * Convert the value to a positive value for the register
                 *
                 * The value lives in the top 8 bits only, be careful
                 * and keep original value of other bits.
                 */
		return (clamp_val(-val, 0, 255) << 8) | (old & 0xff);

	case INA209_CRITICAL_DAC_POS:
		/*
                 * Limit to 0-255 mV, 1 mV LSB
                 *
                 * The value lives in the top 8 bits only, be careful
                 * and keep original value of other bits.
                 */
		return (clamp_val(val, 0, 255) << 8) | (old & 0xff);

	case INA209_POWER_WARN:
	case INA209_POWER_OVER_LIMIT:
		/* 20 mW LSB */
		return DIV_ROUND_CLOSEST(val, 20 * 1000);
	}

	/* Other registers are read-only, return access error */
	return -EACCES;
}

Contributors
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Guenter Roeck 150 100.00% 1 100.00%
Total 150 100.00% 1 100.00%



static int ina209_interval_from_reg(u16 reg)
{
	return 68 >> (15 - ((reg >> 3) & 0x0f));
}

Contributors
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Guenter Roeck 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static u16 ina209_reg_from_interval(u16 config, long interval)
{
	int i, adc;

	if (interval <= 0) {
		adc = 8;
	} else {
		adc = 15;
		for (i = 34 + 34 / 2; i; i >>= 1) {
			if (i < interval)
				break;
			adc--;
		}
	}
	return (config & 0xf807) | (adc << 3) | (adc << 7);
}

Contributors
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Guenter Roeck 83 100.00% 1 100.00%
Total 83 100.00% 1 100.00%



static ssize_t ina209_set_interval(struct device *dev,
				   struct device_attribute *da,
				   const char *buf, size_t count)
{
	struct ina209_data *data = ina209_update_device(dev);
	long val;
	u16 regval;
	int ret;

	if (IS_ERR(data))
		return PTR_ERR(data);

	ret = kstrtol(buf, 10, &val);
	if (ret < 0)
		return ret;

	mutex_lock(&data->update_lock);
	regval = ina209_reg_from_interval(data->regs[INA209_CONFIGURATION],
					  val);
	i2c_smbus_write_word_swapped(data->client, INA209_CONFIGURATION,
				     regval);
	data->regs[INA209_CONFIGURATION] = regval;
	data->update_interval = ina209_interval_from_reg(regval);
	mutex_unlock(&data->update_lock);
	return count;
}

Contributors
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Guenter Roeck 139 100.00% 2 100.00%
Total 139 100.00% 2 100.00%



static ssize_t ina209_show_interval(struct device *dev,
				    struct device_attribute *da, char *buf)
{
	struct ina209_data *data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", data->update_interval);
}

Contributors
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Guenter Roeck 44 100.00% 2 100.00%
Total 44 100.00% 2 100.00%

/*
 * 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[] = {
	INA209_SHUNT_VOLTAGE_POS_PEAK,
	INA209_SHUNT_VOLTAGE_NEG_PEAK,
	INA209_BUS_VOLTAGE_MAX_PEAK,
	INA209_BUS_VOLTAGE_MIN_PEAK,
	INA209_POWER_PEAK
};



static ssize_t ina209_reset_history(struct device *dev,
				    struct device_attribute *da,
				    const char *buf,
				    size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct ina209_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	u32 mask = attr->index;
	long val;
	int i, ret;

	ret = kstrtol(buf, 10, &val);
	if (ret < 0)
		return ret;

	mutex_lock(&data->update_lock);
	for (i = 0; i < ARRAY_SIZE(ina209_reset_history_regs); i++) {
		if (mask & (1 << i))
			i2c_smbus_write_word_swapped(client,
					ina209_reset_history_regs[i], 1);
	}
	data->valid = false;
	mutex_unlock(&data->update_lock);
	return count;
}

Contributors
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Guenter Roeck 154 100.00% 2 100.00%
Total 154 100.00% 2 100.00%



static ssize_t ina209_set_value(struct device *dev,
				struct device_attribute *da,
				const char *buf,
				size_t count)
{
	struct ina209_data *data = ina209_update_device(dev);
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	int reg = attr->index;
	long val;
	int ret;

	if (IS_ERR(data))
		return PTR_ERR(data);

	ret = kstrtol(buf, 10, &val);
	if (ret < 0)
		return ret;

	mutex_lock(&data->update_lock);
	ret = ina209_to_reg(reg, data->regs[reg], val);
	if (ret < 0) {
		count = ret;
		goto abort;
	}
	i2c_smbus_write_word_swapped(data->client, reg, ret);
	data->regs[reg] = ret;
abort:
	mutex_unlock(&data->update_lock);
	return count;
}

Contributors
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Guenter Roeck 163 100.00% 2 100.00%
Total 163 100.00% 2 100.00%



static ssize_t ina209_show_value(struct device *dev,
				 struct device_attribute *da,
				 char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct ina209_data *data = ina209_update_device(dev);
	long val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = ina209_from_reg(attr->index, data->regs[attr->index]);
	return snprintf(buf, PAGE_SIZE, "%ld\n", val);
}

Contributors
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Guenter Roeck 86 100.00% 1 100.00%
Total 86 100.00% 1 100.00%



static ssize_t ina209_show_alarm(struct device *dev,
				 struct device_attribute *da,
				 char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct ina209_data *data = ina209_update_device(dev);
	const unsigned int mask = attr->index;
	u16 status;

	if (IS_ERR(data))
		return PTR_ERR(data);

	status = data->regs[INA209_STATUS];

	/*
         * All alarms are in the INA209_STATUS register. To avoid a long
         * switch statement, the mask is passed in attr->index
         */
	return snprintf(buf, PAGE_SIZE, "%u\n", !!(status & mask));
}

Contributors
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Guenter Roeck 93 100.00% 1 100.00%
Total 93 100.00% 1 100.00%

/* Shunt voltage, history, limits, alarms */
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, ina209_show_value, NULL,
			  INA209_SHUNT_VOLTAGE);
static SENSOR_DEVICE_ATTR(in0_input_highest, S_IRUGO, ina209_show_value, NULL,
			  INA209_SHUNT_VOLTAGE_POS_PEAK);
static SENSOR_DEVICE_ATTR(in0_input_lowest, S_IRUGO, ina209_show_value, NULL,
			  INA209_SHUNT_VOLTAGE_NEG_PEAK);
static SENSOR_DEVICE_ATTR(in0_reset_history, S_IWUSR, NULL,
			  ina209_reset_history, (1 << 0) | (1 << 1));
static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_SHUNT_VOLTAGE_POS_WARN);
static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_SHUNT_VOLTAGE_NEG_WARN);
static SENSOR_DEVICE_ATTR(in0_crit_max, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_CRITICAL_DAC_POS);
static SENSOR_DEVICE_ATTR(in0_crit_min, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_CRITICAL_DAC_NEG);

static SENSOR_DEVICE_ATTR(in0_min_alarm,  S_IRUGO, ina209_show_alarm, NULL,
			  1 << 11);
static SENSOR_DEVICE_ATTR(in0_max_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 12);
static SENSOR_DEVICE_ATTR(in0_crit_min_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 6);
static SENSOR_DEVICE_ATTR(in0_crit_max_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 7);

/* Bus voltage, history, limits, alarms */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ina209_show_value, NULL,
			  INA209_BUS_VOLTAGE);
static SENSOR_DEVICE_ATTR(in1_input_highest, S_IRUGO, ina209_show_value, NULL,
			  INA209_BUS_VOLTAGE_MAX_PEAK);
static SENSOR_DEVICE_ATTR(in1_input_lowest, S_IRUGO, ina209_show_value, NULL,
			  INA209_BUS_VOLTAGE_MIN_PEAK);
static SENSOR_DEVICE_ATTR(in1_reset_history, S_IWUSR, NULL,
			  ina209_reset_history, (1 << 2) | (1 << 3));
static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_BUS_VOLTAGE_OVER_WARN);
static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_BUS_VOLTAGE_UNDER_WARN);
static SENSOR_DEVICE_ATTR(in1_crit_max, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_BUS_VOLTAGE_OVER_LIMIT);
static SENSOR_DEVICE_ATTR(in1_crit_min, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_BUS_VOLTAGE_UNDER_LIMIT);

static SENSOR_DEVICE_ATTR(in1_min_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 14);
static SENSOR_DEVICE_ATTR(in1_max_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 15);
static SENSOR_DEVICE_ATTR(in1_crit_min_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 9);
static SENSOR_DEVICE_ATTR(in1_crit_max_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 10);

/* Power */
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, ina209_show_value, NULL,
			  INA209_POWER);
static SENSOR_DEVICE_ATTR(power1_input_highest, S_IRUGO, ina209_show_value,
			  NULL, INA209_POWER_PEAK);
static SENSOR_DEVICE_ATTR(power1_reset_history, S_IWUSR, NULL,
			  ina209_reset_history, 1 << 4);
static SENSOR_DEVICE_ATTR(power1_max, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_POWER_WARN);
static SENSOR_DEVICE_ATTR(power1_crit, S_IRUGO | S_IWUSR, ina209_show_value,
			  ina209_set_value, INA209_POWER_OVER_LIMIT);

static SENSOR_DEVICE_ATTR(power1_max_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 13);
static SENSOR_DEVICE_ATTR(power1_crit_alarm, S_IRUGO, ina209_show_alarm, NULL,
			  1 << 8);

/* Current */
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ina209_show_value, NULL,
			  INA209_CURRENT);

static SENSOR_DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR,
			  ina209_show_interval, ina209_set_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[] = {
	&sensor_dev_attr_in0_input.dev_attr.attr,
	&sensor_dev_attr_in0_input_highest.dev_attr.attr,
	&sensor_dev_attr_in0_input_lowest.dev_attr.attr,
	&sensor_dev_attr_in0_reset_history.dev_attr.attr,
	&sensor_dev_attr_in0_max.dev_attr.attr,
	&sensor_dev_attr_in0_min.dev_attr.attr,
	&sensor_dev_attr_in0_crit_max.dev_attr.attr,
	&sensor_dev_attr_in0_crit_min.dev_attr.attr,
	&sensor_dev_attr_in0_max_alarm.dev_attr.attr,
	&sensor_dev_attr_in0_min_alarm.dev_attr.attr,
	&sensor_dev_attr_in0_crit_max_alarm.dev_attr.attr,
	&sensor_dev_attr_in0_crit_min_alarm.dev_attr.attr,

	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in1_input_highest.dev_attr.attr,
	&sensor_dev_attr_in1_input_lowest.dev_attr.attr,
	&sensor_dev_attr_in1_reset_history.dev_attr.attr,
	&sensor_dev_attr_in1_max.dev_attr.attr,
	&sensor_dev_attr_in1_min.dev_attr.attr,
	&sensor_dev_attr_in1_crit_max.dev_attr.attr,
	&sensor_dev_attr_in1_crit_min.dev_attr.attr,
	&sensor_dev_attr_in1_max_alarm.dev_attr.attr,
	&sensor_dev_attr_in1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_in1_crit_max_alarm.dev_attr.attr,
	&sensor_dev_attr_in1_crit_min_alarm.dev_attr.attr,

	&sensor_dev_attr_power1_input.dev_attr.attr,
	&sensor_dev_attr_power1_input_highest.dev_attr.attr,
	&sensor_dev_attr_power1_reset_history.dev_attr.attr,
	&sensor_dev_attr_power1_max.dev_attr.attr,
	&sensor_dev_attr_power1_crit.dev_attr.attr,
	&sensor_dev_attr_power1_max_alarm.dev_attr.attr,
	&sensor_dev_attr_power1_crit_alarm.dev_attr.attr,

	&sensor_dev_attr_curr1_input.dev_attr.attr,

	&sensor_dev_attr_update_interval.dev_attr.attr,

	NULL,
};

ATTRIBUTE_GROUPS(ina209);



static void ina209_restore_conf(struct i2c_client *client,
				struct ina209_data *data)
{
	/* Restore initial configuration */
	i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION,
				     data->config_orig);
	i2c_smbus_write_word_swapped(client, INA209_CALIBRATION,
				     data->calibration_orig);
}

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Total 39 100.00% 1 100.00%



static int ina209_init_client(struct i2c_client *client,
			      struct ina209_data *data)
{
	struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev);
	u32 shunt;
	int reg;

	reg = i2c_smbus_read_word_swapped(client, INA209_CALIBRATION);
	if (reg < 0)
		return reg;
	data->calibration_orig = reg;

	reg = i2c_smbus_read_word_swapped(client, INA209_CONFIGURATION);
	if (reg < 0)
		return reg;
	data->config_orig = reg;

	if (pdata) {
		if (pdata->shunt_uohms <= 0)
			return -EINVAL;
		shunt = pdata->shunt_uohms;
	} else if (!of_property_read_u32(client->dev.of_node, "shunt-resistor",
					 &shunt)) {
		if (shunt == 0)
			return -EINVAL;
	} else {
		shunt = data->calibration_orig ?
		  40960000 / data->calibration_orig : INA209_SHUNT_DEFAULT;
	}

	i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION,
				     INA209_CONFIG_DEFAULT);
	data->update_interval = ina209_interval_from_reg(INA209_CONFIG_DEFAULT);

	/*
         * Calibrate current LSB to 1mA. Shunt is in uOhms.
         * See equation 13 in datasheet.
         */
	i2c_smbus_write_word_swapped(client, INA209_CALIBRATION,
				     clamp_val(40960000 / shunt, 1, 65535));

	/* Clear status register */
	i2c_smbus_read_word_swapped(client, INA209_STATUS);

	return 0;
}

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Total 202 100.00% 1 100.00%



static int ina209_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct i2c_adapter *adapter = client->adapter;
	struct ina209_data *data;
	struct device *hwmon_dev;
	int ret;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
		return -ENODEV;

	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	i2c_set_clientdata(client, data);
	data->client = client;
	mutex_init(&data->update_lock);

	ret = ina209_init_client(client, data);
	if (ret)
		return ret;

	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
							   client->name,
							   data, ina209_groups);
	if (IS_ERR(hwmon_dev)) {
		ret = PTR_ERR(hwmon_dev);
		goto out_restore_conf;
	}

	return 0;

out_restore_conf:
	ina209_restore_conf(client, data);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 169 100.00% 2 100.00%
Total 169 100.00% 2 100.00%



static int ina209_remove(struct i2c_client *client)
{
	struct ina209_data *data = i2c_get_clientdata(client);

	ina209_restore_conf(client, data);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%


static const struct i2c_device_id ina209_id[] = {
	{ "ina209", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ina209_id);

/* This is the driver that will be inserted */

static struct i2c_driver ina209_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "ina209",
        },
	.probe		= ina209_probe,
	.remove		= ina209_remove,
	.id_table	= ina209_id,
};


module_i2c_driver(ina209_driver);

MODULE_AUTHOR("Ira W. Snyder <iws@ovro.caltech.edu>, Paul Hays <Paul.Hays@cattail.ca>, Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("INA209 driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 2727 100.00% 2 100.00%
Total 2727 100.00% 2 100.00%
Directory: drivers/hwmon

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Guenter Roeck	156	100.00%	2	100.00%
Total	156	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/hwmon/ina209.c

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