[S] Change in coreboot[master]: stoneyridge: Set the SPI read speed as 66MHz

[Bao Zheng (Code Review)]

Attention is currently required from: Zheng Bao.

Hello Zheng Bao,

I'd like you to do a code review.
Please visit

https://review.coreboot.org/c/coreboot/+/68884

to review the following change.

Change subject: stoneyridge: Set the SPI read speed as 66MHz
......................................................................

stoneyridge: Set the SPI read speed as 66MHz

The SPI read mode for Family 15h in EFS header has been affected by
these two patches. It causes the ChromeBook booting unstable. The old
settings are all FF, which means nothing. So we can not just change it
back. We just change the speed to "Normal", which I assume has the
same effect with old settings. Tested on Grunt.

https://review.coreboot.org/c/coreboot/+/58555
https://review.coreboot.org/c/coreboot/+/58871

BUG=b:247025109
TEST=Grunt

Change-Id: Ia6083cfa515abeb2e981ff0ef825970c9311466b
Signed-off-by: Zheng Bao 
---
M src/mainboard/amd/gardenia/Kconfig
M src/mainboard/amd/pademelon/Kconfig
M src/mainboard/google/kahlee/Kconfig
3 files changed, 25 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/68884/1

diff --git a/src/mainboard/amd/gardenia/Kconfig b/src/mainboard/amd/gardenia/Kconfig
index 2925fd6..eed4f07 100644
--- a/src/mainboard/amd/gardenia/Kconfig
+++ b/src/mainboard/amd/gardenia/Kconfig
@@ -35,7 +35,7 @@

if !EM100
 config EFS_SPI_READ_MODE
-	default 4          # Dual IO (1-2-2)
+	default 0	# Normal

config EFS_SPI_SPEED
    default 0	# 66MHz
diff --git a/src/mainboard/amd/pademelon/Kconfig b/src/mainboard/amd/pademelon/Kconfig
index 9890d7f..593135f 100644
--- a/src/mainboard/amd/pademelon/Kconfig
+++ b/src/mainboard/amd/pademelon/Kconfig
@@ -65,7 +65,7 @@

if !EM100
 config EFS_SPI_READ_MODE
-	default 4          # Dual IO (1-2-2)
+	default 0	# Normal

config EFS_SPI_SPEED
    default 0	# 66MHz
diff --git a/src/mainboard/google/kahlee/Kconfig b/src/mainboard/google/kahlee/Kconfig
index 8c8486e..cdd6d54 100644
--- a/src/mainboard/google/kahlee/Kconfig
+++ b/src/mainboard/google/kahlee/Kconfig
@@ -129,7 +129,7 @@

if !EM100	# EM100 defaults in soc/amd/common/blocks/spi/Kconfig
 config EFS_SPI_READ_MODE
-	default 4          # Dual IO (1-2-2)
+	default 0	# Normal

config EFS_SPI_SPEED
    default 0	# 66MHz