diff options
| author | Nicola Corna <nicola@corna.info> | 2017-02-22 16:52:29 +0100 |
|---|---|---|
| committer | Alexander Couzens <lynxis@fe80.eu> | 2017-02-28 15:56:06 +0100 |
| commit | 435d307415f56fb1df0b80ee6a064e5f8939cfe2 (patch) | |
| tree | 6c4c89a55e8f5bd5e9ed2f898d3973d0d0c0d47e /src/mainboard/lenovo/t400/acpi | |
| parent | b1ffff7dab8004aa4c51f5d774f2ee75facc2ed4 (diff) | |
mainboard/lenovo: Power off USB and mute audio before entering S3
Currently, the USB ports are still powered during S3, so turning
them off may reduce the power consumption.
Note that, when the USB Always on feature is enabled, the USB
ports are always powered, regardless of the USBP state.
This patch also disables the audio, as it might consume some
power or generate some noise.
Both the USB power and the audio are reenabled by coreboot during
the poweron.
Change-Id: If0431b1315fffef2e372e7023f830a66bb7fddae
Signed-off-by: Nicola Corna <nicola@corna.info>
Reviewed-on: https://review.coreboot.org/18464
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Diffstat (limited to 'src/mainboard/lenovo/t400/acpi')
| -rw-r--r-- | src/mainboard/lenovo/t400/acpi/platform.asl | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t400/acpi/platform.asl b/src/mainboard/lenovo/t400/acpi/platform.asl index f60752cfa2..5c6f96861d 100644 --- a/src/mainboard/lenovo/t400/acpi/platform.asl +++ b/src/mainboard/lenovo/t400/acpi/platform.asl @@ -22,6 +22,8 @@ Method(_PTS,1) { // Call a trap so SMI can prepare for Sleep as well. // TRAP(0x55) + \_SB.PCI0.LPCB.EC.MUTE(1) + \_SB.PCI0.LPCB.EC.USBP(0) \_SB.PCI0.LPCB.EC.RADI(0) } |