hwmon: (thmc50) Add support for critical temperature limits

Add critical temperature limits to the driver. These limits are read
only.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
index 3b01001108c..7d97431e132 100644
--- a/drivers/hwmon/thmc50.c
+++ b/drivers/hwmon/thmc50.c
@@ -55,8 +55,11 @@ I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
 static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
 static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
 static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
+static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
+static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
 
 #define THMC50_REG_CONF_nFANOFF                 0x20
+#define THMC50_REG_CONF_PROGRAMMED              0x08
 
 /* Each client has this additional data */
 struct thmc50_data {
@@ -72,6 +75,7 @@ struct thmc50_data {
         s8 temp_input[3];
         s8 temp_max[3];
         s8 temp_min[3];
+        s8 temp_critical[3];
         u8 analog_out;
         u8 alarms;
 };
@@ -199,6 +203,15 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
         return count;
 }
 
+static ssize_t show_temp_critical(struct device *dev,
+                                  struct device_attribute *attr,
+                                  char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct thmc50_data *data = thmc50_update_device(dev);
+        return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
+}
+
 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
                           char *buf)
 {
@@ -214,7 +227,9 @@ static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
                         show_temp_min, set_temp_min, offset - 1);       \
 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
-                        show_temp_max, set_temp_max, offset - 1);
+                        show_temp_max, set_temp_max, offset - 1);       \
+static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO,                 \
+                        show_temp_critical, NULL, offset - 1);
 
 temp_reg(1);
 temp_reg(2);
@@ -234,10 +249,12 @@ static struct attribute *thmc50_attributes[] = {
         &sensor_dev_attr_temp1_max.dev_attr.attr,
         &sensor_dev_attr_temp1_min.dev_attr.attr,
         &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit.dev_attr.attr,
         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
         &sensor_dev_attr_temp2_max.dev_attr.attr,
         &sensor_dev_attr_temp2_min.dev_attr.attr,
         &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit.dev_attr.attr,
         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
         &sensor_dev_attr_temp2_fault.dev_attr.attr,
         &sensor_dev_attr_pwm1.dev_attr.attr,
@@ -254,6 +271,7 @@ static struct attribute *temp3_attributes[] = {
         &sensor_dev_attr_temp3_max.dev_attr.attr,
         &sensor_dev_attr_temp3_min.dev_attr.attr,
         &sensor_dev_attr_temp3_input.dev_attr.attr,
+        &sensor_dev_attr_temp3_crit.dev_attr.attr,
         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
         &sensor_dev_attr_temp3_fault.dev_attr.attr,
         NULL
@@ -429,6 +447,10 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
 
                 int temps = data->has_temp3 ? 3 : 2;
                 int i;
+                int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+
+                prog &= THMC50_REG_CONF_PROGRAMMED;
+
                 for (i = 0; i < temps; i++) {
                         data->temp_input[i] = i2c_smbus_read_byte_data(client,
                                                 THMC50_REG_TEMP[i]);
@@ -436,6 +458,10 @@ static struct thmc50_data *thmc50_update_device(struct device *dev)
                                                 THMC50_REG_TEMP_MAX[i]);
                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
                                                 THMC50_REG_TEMP_MIN[i]);
+                        data->temp_critical[i] =
+                                i2c_smbus_read_byte_data(client,
+                                        prog ? THMC50_REG_TEMP_CRITICAL[i]
+                                             : THMC50_REG_TEMP_DEFAULT[i]);
                 }
                 data->analog_out =
                     i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);