scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2025-12-28 10:45:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

Haswell: Add control for touchscreen reset

Browse Source 
BUG=chrome-os-partner:22076
BRANCH=peppy
TEST=Manual. Verify touchscreen operational in S0.

Change-Id: Ife2d4e11142195bddf202933430ec8af243b1309
Signed-off-by: Dave Parker <dparker@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167150
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Dave Parker
2013-08-27 16:12:20 -07:00
committed by chrome-internal-fetch
parent fe0b6c1acd
commit 2c16da8e91
1 changed files with 17 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
common/chipset_haswell.c
View File

@@ -13,6 +13,7 @@
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "lid_switch.h"
#include "system.h"
#include "timer.h"
#include "util.h"
@@ -157,6 +158,14 @@ enum x86_state x86_handle_state(enum x86_state state)
break;
case X86_S3:
/*
* If lid is closed; hold touchscreen in reset to cut power
* usage. If lid is open, take touchscreen out of reset so it
* can wake the processor. Chipset task is awakened on lid
* switch transitions.
*/
gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, lid_is_open());
/* Check for state transitions */
if (!x86_has_signals(IN_PGOOD_S3)) {
/* Required rail went away */
@@ -247,12 +256,20 @@ enum x86_state x86_handle_state(enum x86_state state)
/* Enable wireless */
wireless_enable(EC_WIRELESS_SWITCH_ALL);
/*
* Make sure touchscreen is out if reset (even if the lid is
* still closed); it may have been turned off if the lid was
* closed in S3.
*/
gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1);
/* Wait for non-core power rails good */
if (x86_wait_signals(IN_PGOOD_S0)) {
chipset_force_shutdown();
wireless_enable(0);
gpio_set_level(GPIO_EC_EDP_VDD_EN, 0);
gpio_set_level(GPIO_PP3300_DX_EN, 0);
gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0);
return X86_S3;
}