thermal: add hwmon sysfs I/F

Add hwmon sys I/F for generic thermal driver.

Note: we have one hwmon class device for EACH TYPE of the thermal zone device.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 16e6a8bdeb3c..06d3e6eb9ca8 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -66,6 +66,23 @@ struct thermal_cooling_device {
                                 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
 #define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)
 
+#if defined(CONFIG_HWMON) ||    \
+        (defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
+/* thermal zone devices with the same type share one hwmon device */
+struct thermal_hwmon_device {
+        char type[THERMAL_NAME_LENGTH];
+        struct device *device;
+        int count;
+        struct list_head tz_list;
+        struct list_head node;
+};
+
+struct thermal_hwmon_attr {
+        struct device_attribute attr;
+        char name[16];
+};
+#endif
+
 struct thermal_zone_device {
         int id;
         char type[THERMAL_NAME_LENGTH];
@@ -77,6 +94,13 @@ struct thermal_zone_device {
         struct idr idr;
         struct mutex lock;      /* protect cooling devices list */
         struct list_head node;
+#if defined(CONFIG_HWMON) ||    \
+        (defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE))
+        struct list_head hwmon_node;
+        struct thermal_hwmon_device *hwmon;
+        struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
+        struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
+#endif
 };
 
 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,