Just like on Cherry Trail, on some Bay Trail Windows 10 tablets we
need to enable the PWM controller to get working backlight even
though _STA returns 0.
Add an entry for the the Bay Trail PWM controller to list of
always-present devices to fix backlight control not working on
some Bay Trail devices.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Changes in v6:
-This is a new patch in v6 of this patch-set
---
drivers/acpi/bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 6fa177c..5f9fe3f 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -163,9 +163,10 @@ struct always_present_device_id {
static const struct always_present_device_id always_present_device_ids[] = {
/*
- * Cherry Trail PWM directly poked by GPU driver in win10,
+ * Bay / Cherry Trail PWM directly poked by GPU driver in win10,
* but Linux uses a separate PWM driver, harmless if not used.
*/
+ ENTRY("80860F09", "1", ICPU(INTEL_FAM6_ATOM_SILVERMONT1)),
ENTRY("80862288", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT)),
/*
* The INT0002 device is necessary to clear wakeup interrupt sources
--
2.9.3
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