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hwmon: (nct7802) Add pwmX_enable attribute 

Introduced REG_SMARTFAN_EN, SMARTFAN_EN_SHIFT, pwmX_enable,
show_pwm_enable, store_pwm_enable.

Signed-off-by: Constantine Shulyupin <const@MakeLinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Constantine Shulyupin 2015-07-08 00:40:10 +03:00 committed by Guenter Roeck
parent 3e40b8602a
commit 5102f02268
1 changed files with 48 additions and 0 deletions
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48
drivers/hwmon/nct7802.c
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@ -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