[coreboot-gerrit] Change in coreboot[master]: mb/amd/mandolin: change EFS SPI mode from 1-4-4 to 1-1-4

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/45831 )

Change subject: mb/amd/mandolin: change EFS SPI mode from 1-4-4 to 1-1-4
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mb/amd/mandolin: change EFS SPI mode from 1-4-4 to 1-1-4

With this change the flash addresses will only get transferred over one
data pin like in the non-quad SPI mode and only the data will get sent
over all four data pins. Since this gives the flash chip a bit more time
to fetch the data the host requested, this allows higher SPI frequencies
resulting in a higher throughput when bigger chunks of memory get read.

BRANCH=zork

Change-Id: Iad4c922ffcdba4b17e6e81244ff37302eb171d97
Signed-off-by: Felix Held 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45831
Reviewed-by: Marshall Dawson 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/amd/mandolin/Kconfig
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Marshall Dawson: Looks good to me, approved

diff --git a/src/mainboard/amd/mandolin/Kconfig b/src/mainboard/amd/mandolin/Kconfig
index 1d2fa5e..63b6306 100644
--- a/src/mainboard/amd/mandolin/Kconfig
+++ b/src/mainboard/amd/mandolin/Kconfig
@@ -110,7 +110,7 @@
 config EFS_SPI_READ_MODE
    int
    default 0 if EM100
-	default 5
+	default 3

config EFS_SPI_SPEED
    int