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Date: Sun, 28 Jun 2015 00:34:10 +0300
From: Constantine Shulyupin <const@...eLinux.com>
To: jdelvare@...e.de, linux@...ck-us.net, lm-sensors@...sensors.org,
linux-kernel@...r.kernel.org
Cc: const <const@...eLinux.com>
Subject: [PATCH] hwmon: (nct7802) add temperature sensor type attribute
From: const <const@...eLinux.com>
0, 3 - Temperature attributes are hidden
1 - Current mode
2 - Thermistor mode
Reference:
Nuvoton Hardware Monitoring IC NCT7802Y
7.2.32 Mode Selection Register
Location : Index 22h
Signed-off-by: Constantine Shulyupin <const@...eLinux.com>
---
drivers/hwmon/nct7802.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index 60cf5d1..444eedf 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -49,7 +49,7 @@ static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
#define REG_VOLTAGE_LOW 0x0f
#define REG_FANCOUNT_LOW 0x13
#define REG_START 0x21
-#define REG_MODE 0x22
+#define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */
#define REG_PECI_ENABLE 0x23
#define REG_FAN_ENABLE 0x24
#define REG_VMON_ENABLE 0x25
@@ -725,7 +725,58 @@ static struct attribute_group nct7802_fan_group = {
.is_visible = nct7802_fan_is_visible,
};
+static ssize_t show_temp_type(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 val;
+ int ret;
+
+ ret = regmap_read(data->regmap, REG_MODE, &val);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%u\n", val >> (2 * sattr->index) & 3);
+}
+
+static ssize_t store_temp_type(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);
+ unsigned int val;
+ int err;
+
+ err = kstrtouint(buf, 0, &val);
+ if (err < 0)
+ return err;
+ if (val > 0xF)
+ return -EINVAL;
+
+ err = regmap_update_bits(data->regmap, REG_MODE,
+ 3 << 2 * sattr->index, val << 2 * sattr->index);
+ sysfs_update_group(&dev->kobj, &nct7802_temp_group);
+ return err ? : count;
+}
+
+/* 7.2.32 Mode Selection Register */
+static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
+ show_temp_type, store_temp_type, 0);
+static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
+ show_temp_type, store_temp_type, 1);
+static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
+ show_temp_type, store_temp_type, 2);
+
+static struct attribute *general_attributes[] = {
+ &sensor_dev_attr_temp1_type.dev_attr.attr,
+ &sensor_dev_attr_temp2_type.dev_attr.attr,
+ &sensor_dev_attr_temp3_type.dev_attr.attr,
+ NULL
+};
+
static const struct attribute_group *nct7802_groups[] = {
+ &(const struct attribute_group){ .attrs = general_attributes },
&nct7802_temp_group,
&nct7802_in_group,
&nct7802_fan_group,
--
1.9.1
--
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