[coreboot-gerrit] Change in ...coreboot[master]: mainboard/google/poppy/variants/rammus: Fixed touchscreen function fa...

[Ken Lu (Code Review)]

Ken Lu has uploaded a new patch set (#4) to the change originally created by YanRu Chen. ( https://review.coreboot.org/c/coreboot/+/30180 )

Change subject: mainboard/google/poppy/variants/rammus: Fixed touchscreen function failed on EVT FATP
......................................................................

mainboard/google/poppy/variants/rammus: Fixed touchscreen function failed on EVT FATP

According to issue tracker b:119238959 #4 & #6 .
Hardware modify design to make GPP_E3 to be a switch of touchscreen I2C CLK and SDA.
Control GPP_E3 to make touchscreen I2C CLK and SDA keep low during power on initialization
to avoid data transfer during this time . After touchscreen IC initial complete ,control
GPP_E3 to high to make touchscreen I2C CLK and SDA work normally .

BUG=b:119238959
BRANCH=firmware-rammus-11275.B
TEST=emerge-rammus coreboot chromeos-ec chromeos-bootimage
Flash FW to DUT, run S5 stress test and verify the result

Signed-off-by: YanRu Chen <kane_chen at pegatron.corp-partner.google.com>
Change-Id: I86452c1445243c499aeaf931dba286db169c5628
---
M src/mainboard/google/poppy/variants/rammus/devicetree.cb
M src/mainboard/google/poppy/variants/rammus/gpio.c
2 files changed, 5 insertions(+), 3 deletions(-)


  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/80/30180/4
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I86452c1445243c499aeaf931dba286db169c5628
Gerrit-Change-Number: 30180
Gerrit-PatchSet: 4
Gerrit-Owner: YanRu Chen <kane_chen at pegatron.corp-partner.google.com>
Gerrit-Reviewer: Furquan Shaikh <furquan at google.com>
Gerrit-Reviewer: YanRu Chen <kane_chen at pegatron.corp-partner.google.com>
Gerrit-Reviewer: Zhuohao Lee <zhuohao at chromium.org>
Gerrit-CC: Jerry Chou <jerry_chou at pegatron.corp-partner.google.com>
Gerrit-CC: Ken Lu <ken_lu at pegatron.corp-partner.google.com>
Gerrit-MessageType: newpatchset
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