thermal/drivers/mediatek/lvts_thermal: Register thermal zones as hwmon sensors

Register thermal zones as hwmon sensors to let userspace read
temperatures using standard hwmon interface.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230613091317.1691247-1-wenst@chromium.org

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index d0a3f95..1e11def 100644 (file)
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -19,6 +19,8 @@
 #include <linux/thermal.h>
 #include <dt-bindings/thermal/mediatek,lvts-thermal.h>
 
+#include "../thermal_hwmon.h"
+
 #define LVTS_MONCTL0(__base)   (__base + 0x0000)
 #define LVTS_MONCTL1(__base)   (__base + 0x0004)
 #define LVTS_MONCTL2(__base)   (__base + 0x0008)
@@ -996,6 +998,9 @@ static int lvts_ctrl_start(struct device *dev, struct lvts_ctrl *lvts_ctrl)
                        return PTR_ERR(tz);
                }
 
+               if (devm_thermal_add_hwmon_sysfs(dev, tz))
+                       dev_warn(dev, "zone %d: Failed to add hwmon sysfs attributes\n", dt_id);
+
                /*
                 * The thermal zone pointer will be needed in the
                 * interrupt handler, we store it in the sensor