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Commit 5102f022 authored by Constantine Shulyupin's avatar Constantine Shulyupin Committed by Guenter Roeck
Browse files

hwmon: (nct7802) Add pwmX_enable attribute 



Introduced REG_SMARTFAN_EN, SMARTFAN_EN_SHIFT, pwmX_enable,
show_pwm_enable, store_pwm_enable.

Signed-off-by: default avatarConstantine Shulyupin <const@MakeLinux.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 3e40b860

drivers/hwmon/nct7802.c

+48 −0
Original line number Diff line number Diff line
@@ -53,6 +53,8 @@ static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { 
#define REG_PECI_ENABLE		0x23

#define REG_FAN_ENABLE		0x24

#define REG_VMON_ENABLE		0x25

#define REG_SMARTFAN_EN(x)      (0x64 + (x) / 2)

#define SMARTFAN_EN_SHIFT(x)    ((x) % 2 * 4)

#define REG_VENDOR_ID		0xfd

#define REG_CHIP_ID		0xfe

#define REG_VERSION_ID		0xff
@@ -151,6 +153,41 @@ static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr, 
	return err ? : count;

}



static ssize_t show_pwm_enable(struct device *dev,

			       struct device_attribute *attr, char *buf)

{

	struct nct7802_data *data = dev_get_drvdata(dev);

	struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);

	unsigned int reg, enabled;

	int ret;



	ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), &reg);

	if (ret < 0)

		return ret;

	enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;

	return sprintf(buf, "%u\n", enabled + 1);

}



static ssize_t store_pwm_enable(struct device *dev,

				struct device_attribute *attr,

				const char *buf, size_t count)

{

	struct nct7802_data *data = dev_get_drvdata(dev);

	struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);

	u8 val;

	int ret;



	ret = kstrtou8(buf, 0, &val);

	if (ret < 0)

		return ret;

	if (val < 1 || val > 2)

		return -EINVAL;

	ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),

				 1 << SMARTFAN_EN_SHIFT(sattr->index),

				 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));

	return ret ? : count;

}



static int nct7802_read_temp(struct nct7802_data *data,

			     u8 reg_temp, u8 reg_temp_low, int *temp)

{
@@ -793,6 +830,14 @@ static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x60); 
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x61);

static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x62);



/* 7.2.95... Temperature to Fan mapping Relationships Register */

static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,

			  store_pwm_enable, 0);

static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,

			  store_pwm_enable, 1);

static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,

			  store_pwm_enable, 2);



static struct attribute *nct7802_fan_attrs[] = {

	&sensor_dev_attr_fan1_input.dev_attr.attr,

	&sensor_dev_attr_fan1_min.dev_attr.attr,
@@ -832,10 +877,13 @@ static struct attribute_group nct7802_fan_group = { 
};



static struct attribute *nct7802_pwm_attrs[] = {

	&sensor_dev_attr_pwm1_enable.dev_attr.attr,

	&sensor_dev_attr_pwm1_mode.dev_attr.attr,

	&sensor_dev_attr_pwm1.dev_attr.attr,

	&sensor_dev_attr_pwm2_enable.dev_attr.attr,

	&sensor_dev_attr_pwm2_mode.dev_attr.attr,

	&sensor_dev_attr_pwm2.dev_attr.attr,

	&sensor_dev_attr_pwm3_enable.dev_attr.attr,

	&sensor_dev_attr_pwm3_mode.dev_attr.attr,

	&sensor_dev_attr_pwm3.dev_attr.attr,

	NULL