[coreboot-gerrit] Change in coreboot[master]: google/cyan: Configure WLAN_CLKREQ as GPIO and always assert low

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/27762


Change subject: google/cyan: Configure WLAN_CLKREQ as GPIO and always assert low
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google/cyan: Configure WLAN_CLKREQ as GPIO and always assert low

Adapted from chromium commit adcb858
[cyan: Configure WLAN_CLKREQ as GPIO and always assert low]

This is a workaround for issue b/35648315 as proposed by Intel to
ensure that WLAN_CLKREQ always stays low.

BUG=b:35648315

Original-Change-Id: I178b3e4fbf74cf08eadfa8bd31b80b018f330e77
Original-Signed-off-by: Furquan Shaikh <furquan at google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/1055652
Original-Reviewed-by: Rajat Jain <rajatja at chromium.org>
Original-Tested-by: Rajat Jain <rajatja at chromium.org>

Change-Id: Ie3458b3fbd1ecadf6b99b9804fb98440cf8d6938
Signed-off-by: Matt DeVillier <matt.devillier at gmail.com>
---
M src/mainboard/google/cyan/variants/cyan/gpio.c
1 file changed, 3 insertions(+), 1 deletion(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/27762/1

diff --git a/src/mainboard/google/cyan/variants/cyan/gpio.c b/src/mainboard/google/cyan/variants/cyan/gpio.c
index 4139f76..bf869fe 100644
--- a/src/mainboard/google/cyan/variants/cyan/gpio.c
+++ b/src/mainboard/google/cyan/variants/cyan/gpio.c
@@ -136,7 +136,9 @@
 	Native_M1, /* 90 PCIE_CLKREQ0B */
 	GPIO_INPUT_PU_20K, /* 91 GPI PCIE_CLKREQ1B/LTE_WAKE# */
 	Native_M1, /* 92 GP_SSP_2_CLK */
-	NATIVE_PU20K(1), /* 93 PCIE_CLKREQ2B/PCIE_CLKREQ_WLAN# */
+	/* Workaround for issue b/35648315: Program this as GPIO and always
+	   assert it low. */
+	GPIO_OUT_LOW, /* 93 PCIE_CLKREQ2B/PCIE_CLKREQ_WLAN# */
 	Native_M1, /* 94 GP_SSP_2_RXD */
 	GPI(trig_edge_both, L1, P_5K_H, 0, en_edge_detect, NA, NA),
 		/* 95 PCIE_CLKREQ3B/AUDIO_CODEC_IRQ */

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie3458b3fbd1ecadf6b99b9804fb98440cf8d6938
Gerrit-Change-Number: 27762
Gerrit-PatchSet: 1
Gerrit-Owner: Matt DeVillier <matt.devillier at gmail.com>
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