thermal: Use mode helpers in drivers

Use thermal_zone_device_{en|dis}able() and thermal_zone_device_is_enabled().

Consequently, all set_mode() implementations in drivers:

- can stop modifying tzd's "mode" member,
- shall stop taking tzd's lock, as it is taken in the helpers
- shall stop calling thermal_zone_device_update() as it is called in the
helpers
- can assume they are called when the mode truly changes, so checks to
verify that can be dropped

Not providing set_mode() by a driver no longer prevents the core from
being able to set tzd's mode, so the relevant check in mode_store() is
removed.

Other comments:

- acpi/thermal.c: tz->thermal_zone->mode will be updated only after we
return from set_mode(), so use function parameter in thermal_set_mode()
instead, no need to call acpi_thermal_check() in set_mode()
- thermal/imx_thermal.c: regmap writes and mode assignment are done in
thermal_zone_device_{en|dis}able() and set_mode() callback
- thermal/intel/intel_quark_dts_thermal.c: soc_dts_{en|dis}able() are a
part of set_mode() callback, so they don't need to modify tzd->mode, and
don't need to fall back to the opposite mode if unsuccessful, as the return
value will be propagated to thermal_zone_device_{en|dis}able() and
ultimately tzd's member will not be changed in thermal_zone_device_set_mode().
- thermal/of-thermal.c: no need to set zone->mode to DISABLED in
of_parse_thermal_zones() as a tzd is kzalloc'ed so mode is DISABLED anyway

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
[for acerhdf]
Acked-by: Peter Kaestle <peter@piie.net>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200629122925.21729-8-andrzej.p@collabora.com

1 files changed, 11 insertions, 10 deletions

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 592be97c4456..52b6cda1bcc3 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -499,7 +499,7 @@ static void acpi_thermal_check(void *data)
 {
 	struct acpi_thermal *tz = data;
 
-	if (tz->thermal_zone->mode != THERMAL_DEVICE_ENABLED)
+	if (!thermal_zone_device_is_enabled(tz->thermal_zone))
 		return;
 
 	thermal_zone_device_update(tz->thermal_zone,
@@ -542,14 +542,11 @@ static int thermal_set_mode(struct thermal_zone_device *thermal,
 	if (mode == THERMAL_DEVICE_DISABLED)
 		pr_warn("thermal zone will be disabled\n");
 
-	if (mode != tz->thermal_zone->mode) {
-		tz->thermal_zone->mode = mode;
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"%s kernel ACPI thermal control\n",
-			tz->thermal_zone->mode == THERMAL_DEVICE_ENABLED ?
-			"Enable" : "Disable"));
-		acpi_thermal_check(tz);
-	}
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+		"%s kernel ACPI thermal control\n",
+		mode == THERMAL_DEVICE_ENABLED ?
+		"Enable" : "Disable"));
+
 	return 0;
 }
 
@@ -897,13 +894,17 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 		goto remove_dev_link;
 	}
 
-	tz->thermal_zone->mode = THERMAL_DEVICE_ENABLED;
+	result = thermal_zone_device_enable(tz->thermal_zone);
+	if (result)
+		goto acpi_bus_detach;
 
 	dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
 		 tz->thermal_zone->id);
 
 	return 0;
 
+acpi_bus_detach:
+	acpi_bus_detach_private_data(tz->device->handle);
 remove_dev_link:
 	sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
 remove_tz_link: