thermal: provide an UAPI header file

include/linux/thermal.h contains definitions for the Thermal generic
netlink family, but none of the valuable information relevant to
user-space such as the Genl family name, multicast group, version or
command set and data types is exported to user-space.

Export all the relevant generic netlink information to user-space to
make this genl family usable by user-space, and while at it, export
THERMAL_NAME_LENGTH since it limits name length for thermal_hwmon
devices.

Kbuild and MAINTAINERS are also updated accordingly to reflect this new
file: include/uapi/linux/thermal.h.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

4 files changed, 38 insertions, 30 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 0ff630de8a6d..9c709f503c03 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9295,6 +9295,7 @@ Q:	https://patchwork.kernel.org/project/linux-pm/list/
 S:      Supported
 F:      drivers/thermal/
 F:      include/linux/thermal.h
+F:      include/uapi/linux/thermal.h
 F:      include/linux/cpu_cooling.h
 F:      Documentation/devicetree/bindings/thermal/
 
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index ef90838b36a0..70f87406bed9 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -29,10 +29,10 @@
 #include <linux/idr.h>
 #include <linux/device.h>
 #include <linux/workqueue.h>
+#include <uapi/linux/thermal.h>
 
 #define THERMAL_TRIPS_NONE      -1
 #define THERMAL_MAX_TRIPS       12
-#define THERMAL_NAME_LENGTH     20
 
 /* invalid cooling state */
 #define THERMAL_CSTATE_INVALID -1UL
@@ -49,11 +49,6 @@
 #define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
 #define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732)
 
-/* Adding event notification support elements */
-#define THERMAL_GENL_FAMILY_NAME                "thermal_event"
-#define THERMAL_GENL_VERSION                    0x01
-#define THERMAL_GENL_MCAST_GROUP_NAME           "thermal_mc_grp"
-
 /* Default Thermal Governor */
 #if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
 #define DEFAULT_THERMAL_GOVERNOR       "step_wise"
@@ -86,30 +81,6 @@ enum thermal_trend {
         THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */
 };
 
-/* Events supported by Thermal Netlink */
-enum events {
-        THERMAL_AUX0,
-        THERMAL_AUX1,
-        THERMAL_CRITICAL,
-        THERMAL_DEV_FAULT,
-};
-
-/* attributes of thermal_genl_family */
-enum {
-        THERMAL_GENL_ATTR_UNSPEC,
-        THERMAL_GENL_ATTR_EVENT,
-        __THERMAL_GENL_ATTR_MAX,
-};
-#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
-
-/* commands supported by the thermal_genl_family */
-enum {
-        THERMAL_GENL_CMD_UNSPEC,
-        THERMAL_GENL_CMD_EVENT,
-        __THERMAL_GENL_CMD_MAX,
-};
-#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
-
 struct thermal_zone_device_ops {
         int (*bind) (struct thermal_zone_device *,
                      struct thermal_cooling_device *);
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 4c94f31a8c99..a1943e2d1264 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -383,6 +383,7 @@ header-y += tcp.h
 header-y += tcp_metrics.h
 header-y += telephony.h
 header-y += termios.h
+header-y += thermal.h
 header-y += time.h
 header-y += times.h
 header-y += timex.h
diff --git a/include/uapi/linux/thermal.h b/include/uapi/linux/thermal.h
new file mode 100644
index 000000000000..ac5535855982
--- /dev/null
+++ b/include/uapi/linux/thermal.h
@@ -0,0 +1,35 @@
+#ifndef _UAPI_LINUX_THERMAL_H
+#define _UAPI_LINUX_THERMAL_H
+
+#define THERMAL_NAME_LENGTH     20
+
+/* Adding event notification support elements */
+#define THERMAL_GENL_FAMILY_NAME                "thermal_event"
+#define THERMAL_GENL_VERSION                    0x01
+#define THERMAL_GENL_MCAST_GROUP_NAME           "thermal_mc_grp"
+
+/* Events supported by Thermal Netlink */
+enum events {
+        THERMAL_AUX0,
+        THERMAL_AUX1,
+        THERMAL_CRITICAL,
+        THERMAL_DEV_FAULT,
+};
+
+/* attributes of thermal_genl_family */
+enum {
+        THERMAL_GENL_ATTR_UNSPEC,
+        THERMAL_GENL_ATTR_EVENT,
+        __THERMAL_GENL_ATTR_MAX,
+};
+#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
+
+/* commands supported by the thermal_genl_family */
+enum {
+        THERMAL_GENL_CMD_UNSPEC,
+        THERMAL_GENL_CMD_EVENT,
+        __THERMAL_GENL_CMD_MAX,
+};
+#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
+
+#endif /* _UAPI_LINUX_THERMAL_H */