diff options
| author | Patrick Rudolph <siro@das-labor.org> | 2017-08-14 17:46:58 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2018-07-19 16:44:15 +0000 |
| commit | 6b7178aa107ef7e2475e3b1f32ac849d98798406 (patch) | |
| tree | 0762a1acc7364c58c35c99af63653fe783ec28cd /src/ec/lenovo/h8/acpi | |
| parent | 60eca531df7d13272d9d8b41c7992d18fad75a16 (diff) | |
ec/lenovo/h8/ssdt: Add keyboard backlight interface
Add methods MLCG and MLCS for thinkpad_acpi kernel module.
Required for backlight or thinklight control from userspace.
Change-Id: Ia65e770e772936c9c32be33c30839a2dee2a107c
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/21002
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Diffstat (limited to 'src/ec/lenovo/h8/acpi')
| -rw-r--r-- | src/ec/lenovo/h8/acpi/thinkpad.asl | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/ec/lenovo/h8/acpi/thinkpad.asl b/src/ec/lenovo/h8/acpi/thinkpad.asl index d0e4234ed9..a0812e5d48 100644 --- a/src/ec/lenovo/h8/acpi/thinkpad.asl +++ b/src/ec/lenovo/h8/acpi/thinkpad.asl @@ -19,6 +19,7 @@ Device (HKEY) /* Generated by ssdt.c */ External (\HBDC, IntObj) External (\HWAN, IntObj) + External (\HKBL, IntObj) Name (_HID, EisaId ("IBM0068")) @@ -228,4 +229,34 @@ Device (HKEY) /* FIXME: Store state at resume */ } } + + /* + * Argument is unused. + * Returns the current state: + * Bit 9: Backlight HW present + * Bit 0-1: Brightness level + */ + Method (MLCG, 1) + { + If (HKBL) { + Store (0x200, Local0) + /* FIXME: Support 2bit brightness control */ + Or (Local0, \_SB.PCI0.LPCB.EC.KBLT, Local0) + Return (Local0) + } Else { + Return (0) + } + } + + /* + * Set the current state: + * Bit 0-1: Brightness level + */ + Method (MLCS, 1) + { + If (HKBL) { + /* FIXME: Support 2bit brightness control */ + Store (And(Arg0, 1), \_SB.PCI0.LPCB.EC.WWEB) + } + } } |