Thermal: int3403: Add CRT and PSV trip

The ACPI object definition can contain passive and critical
trip temperature. Export them via thermal sysfs.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 60 insertions, 7 deletions

diff --git a/drivers/thermal/int3403_thermal.c b/drivers/thermal/int3403_thermal.c
index e93f0253f6ed..17554eeb3953 100644
--- a/drivers/thermal/int3403_thermal.c
+++ b/drivers/thermal/int3403_thermal.c
@@ -33,6 +33,10 @@
 struct int3403_sensor {
         struct thermal_zone_device *tzone;
         unsigned long *thresholds;
+        unsigned long   crit_temp;
+        int             crit_trip_id;
+        unsigned long   psv_temp;
+        int             psv_trip_id;
 };
 
 static int sys_get_curr_temp(struct thermal_zone_device *tzone,
@@ -79,12 +83,18 @@ static int sys_get_trip_temp(struct thermal_zone_device *tzone,
         struct acpi_device *device = tzone->devdata;
         struct int3403_sensor *obj = acpi_driver_data(device);
 
-        /*
-         * get_trip_temp is a mandatory callback but
-         * PATx method doesn't return any value, so return
-         * cached value, which was last set from user space.
-         */
-        *temp = obj->thresholds[trip];
+        if (trip == obj->crit_trip_id)
+                *temp = obj->crit_temp;
+        else if (trip == obj->psv_trip_id)
+                *temp = obj->psv_temp;
+        else {
+                /*
+                 * get_trip_temp is a mandatory callback but
+                 * PATx method doesn't return any value, so return
+                 * cached value, which was last set from user space.
+                 */
+                *temp = obj->thresholds[trip];
+        }
 
         return 0;
 }
@@ -92,8 +102,14 @@ static int sys_get_trip_temp(struct thermal_zone_device *tzone,
 static int sys_get_trip_type(struct thermal_zone_device *thermal,
                 int trip, enum thermal_trip_type *type)
 {
+        struct acpi_device *device = thermal->devdata;
+        struct int3403_sensor *obj = acpi_driver_data(device);
+
         /* Mandatory callback, may not mean much here */
-        *type = THERMAL_TRIP_PASSIVE;
+        if (trip == obj->crit_trip_id)
+                *type = THERMAL_TRIP_CRITICAL;
+        else
+                *type = THERMAL_TRIP_PASSIVE;
 
         return 0;
 }
@@ -155,6 +171,34 @@ static void acpi_thermal_notify(struct acpi_device *device, u32 event)
         }
 }
 
+static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
+{
+        unsigned long long crt;
+        acpi_status status;
+
+        status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
+        if (ACPI_FAILURE(status))
+                return -EIO;
+
+        *temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
+
+        return 0;
+}
+
+static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
+{
+        unsigned long long psv;
+        acpi_status status;
+
+        status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
+        if (ACPI_FAILURE(status))
+                return -EIO;
+
+        *temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
+
+        return 0;
+}
+
 static int acpi_int3403_add(struct acpi_device *device)
 {
         int result = 0;
@@ -194,6 +238,15 @@ static int acpi_int3403_add(struct acpi_device *device)
                         return -ENOMEM;
                 trip_mask = BIT(trip_cnt) - 1;
         }
+
+        obj->psv_trip_id = -1;
+        if (!sys_get_trip_psv(device, &obj->psv_temp))
+                obj->psv_trip_id = trip_cnt++;
+
+        obj->crit_trip_id = -1;
+        if (!sys_get_trip_crt(device, &obj->crit_temp))
+                obj->crit_trip_id = trip_cnt++;
+
         obj->tzone = thermal_zone_device_register(acpi_device_bid(device),
                                 trip_cnt, trip_mask, device, &tzone_ops,
                                 NULL, 0, 0);