erebion/coreboot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

peppy: Drive WLAN_DISABLE_L / BT_ON low in S3 and S5.

Browse source 
When the board is in S3 and S5 the WLAN_DISABLE_L signal
can leak power into the WLAN power well since the GPIO
controlling WLAN_DISABLE_L is in the suspend well. Therefore,
drive WLAN_DISABLE_L low to avoid the power leak.

This is a clone of a Falco change:
I1a0df80dd47fdbd535aca7a9d49253794c480606.

BUG=chrome-os-partner:21291.
TEST=Manual. WLAN continues to work in S0.

Change-Id: I625dfbb228d1f293b880a52dfe552842d55a17d1
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/63220
Reviewed-by: Dave Parker <dparker@chromium.org>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
This commit is contained in:
Shawn Nematbakhsh 2013-07-24 11:01:08 -07:00 • committed by ChromeBot
commit 21aa183c8f
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/mainboard/google/peppy/smihandler.c
View file

@ -34,6 +34,8 @@
/* Codec enable: GPIO45 */
#define GPIO_PP3300_CODEC_EN 45
/* WLAN / BT enable: GPIO46 */
#define GPIO_WLAN_DISABLE_L 46
int mainboard_io_trap_handler(int smif)
{
@ -103,6 +105,7 @@ void mainboard_smi_sleep(u8 slp_typ)
1, USB_CHARGE_MODE_DISABLED);
set_gpio(GPIO_PP3300_CODEC_EN, 0);
set_gpio(GPIO_WLAN_DISABLE_L, 0);
break;
case 5:
if (smm_get_gnvs()->s5u0 == 0)
@ -113,6 +116,7 @@ void mainboard_smi_sleep(u8 slp_typ)
1, USB_CHARGE_MODE_DISABLED);
set_gpio(GPIO_PP3300_CODEC_EN, 0);
set_gpio(GPIO_WLAN_DISABLE_L, 0);
break;
}