hwmon/w83627ehf: Export the thermal sensor types

Add support for the w83627ehf thermal sensor types. I made them read-only,
as the BIOS is supposed to set them up properly. This information makes it
easier to find out which temperature channel corresponds to the CPU.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

1 files changed, 23 insertions, 1 deletions

diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index e87fcf87a6e2..a78d3c2623ba 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -272,6 +272,7 @@ struct w83627ehf_data {
         u8 fan_min[5];
         u8 fan_div[5];
         u8 has_fan;             /* some fan inputs can be disabled */
+        u8 temp_type[3];
         s8 temp1;
         s8 temp1_max;
         s8 temp1_max_hyst;
@@ -846,6 +847,15 @@ store_##reg(struct device *dev, struct device_attribute *attr, \
 store_temp_reg(OVER, temp_max);
 store_temp_reg(HYST, temp_max_hyst);
 
+static ssize_t
+show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct w83627ehf_data *data = w83627ehf_update_device(dev);
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        return sprintf(buf, "%d\n", (int)data->temp_type[nr]);
+}
+
 static struct sensor_device_attribute sda_temp[] = {
         SENSOR_ATTR(temp1_input, S_IRUGO, show_temp1, NULL, 0),
         SENSOR_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0),
@@ -865,6 +875,9 @@ static struct sensor_device_attribute sda_temp[] = {
         SENSOR_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4),
         SENSOR_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5),
         SENSOR_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13),
+        SENSOR_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0),
+        SENSOR_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1),
+        SENSOR_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2),
 };
 
 #define show_pwm_reg(reg) \
@@ -1188,7 +1201,7 @@ static void w83627ehf_device_remove_files(struct device *dev)
 static inline void __devinit w83627ehf_init_device(struct w83627ehf_data *data)
 {
         int i;
-        u8 tmp;
+        u8 tmp, diode;
 
         /* Start monitoring is needed */
         tmp = w83627ehf_read_value(data, W83627EHF_REG_CONFIG);
@@ -1210,6 +1223,15 @@ static inline void __devinit w83627ehf_init_device(struct w83627ehf_data *data)
         tmp = w83627ehf_read_value(data, W83627EHF_REG_VBAT);
         if (!(tmp & 0x01))
                 w83627ehf_write_value(data, W83627EHF_REG_VBAT, tmp | 0x01);
+
+        /* Get thermal sensor types */
+        diode = w83627ehf_read_value(data, W83627EHF_REG_DIODE);
+        for (i = 0; i < 3; i++) {
+                if ((tmp & (0x02 << i)))
+                        data->temp_type[i] = (diode & (0x10 << i)) ? 1 : 2;
+                else
+                        data->temp_type[i] = 4; /* thermistor */
+        }
 }
 
 static int __devinit w83627ehf_probe(struct platform_device *pdev)