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authorConstantine Shulyupin <const@MakeLinux.com>2015-07-08 00:40:10 +0300
committerGuenter Roeck <linux@roeck-us.net>2015-08-09 23:44:26 +0300
commit5102f022688ccd59b1fe4efc8a46ec3aca02dfc5 (patch)
treee9e4c217bbdb746119877625e656c2965e9366e9 /drivers/hwmon
parent3e40b8602aa5309e0b117701c36971367af40682 (diff)
downloadlinux-5102f022688ccd59b1fe4efc8a46ec3aca02dfc5.tar.xz
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>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/nct7802.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index 1c80aa48ee04..f4908bb228b8 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -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