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mb/google/hatch/variants/helios: Fix leakage voltage problem on touchscreen 

Set GPP_C4 default to low to fix leakage voltage problem on touchscreen during power on.

BUG=b:142368161
BRANCH=Master
TEST=emerge-hatch coreboot chromeos-ec chromeos-bootimage
Flash FW to DUT, and make sure touchscreen works.

Signed-off-by: Kane Chen <kane_chen@pegatron.corp-partner.google.com>
Change-Id: Ie9197192c9d6dfb30c10559990c6010b1b2d3a45
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36670
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Shelley Chen <shchen@google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Kane Chen 2019-11-08 15:52:29 +08:00 committed by Subrata Banik
parent 87c52809b2
commit 799184397a
1 changed files with 2 additions and 0 deletions
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src/mainboard/google/hatch/variants/helios/gpio.c
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@ -33,6 +33,8 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_B19, NONE),
/* C1 : SMBDATA ==> NC */
PAD_NC(GPP_C1, NONE),
/* C4 : TOUCHSCREEN_DIS_L */
PAD_CFG_GPO(GPP_C4, 0, DEEP),
/* C6 : GPP_C6 ==> NC */
PAD_NC(GPP_C6, NONE),
/* C7 : GPP_C7 ==> NC */