Change in coreboot[master]: soc/mediatek/mt8195: fine tune pmif spi hardware settings for stability

[Rex-BC Chen (Code Review)]

Rex-BC Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/56166 )

Change subject: soc/mediatek/mt8195: fine tune pmif spi hardware settings for stability
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soc/mediatek/mt8195: fine tune pmif spi hardware settings for stability

Update IO driving setting for pmif spi.

Signed-off-by: James Lo 
Change-Id: I48268cda8845a591592d8ca828ffe492e6dfe0ce
---
M src/soc/mediatek/mt8195/include/soc/iocfg.h
M src/soc/mediatek/mt8195/pmif_spi.c
2 files changed, 4 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/56166/1

diff --git a/src/soc/mediatek/mt8195/include/soc/iocfg.h b/src/soc/mediatek/mt8195/include/soc/iocfg.h
index 8ca2f62..f3524dc 100644
--- a/src/soc/mediatek/mt8195/include/soc/iocfg.h
+++ b/src/soc/mediatek/mt8195/include/soc/iocfg.h
@@ -63,5 +63,6 @@

enum {
    IO_4_MA = 0x9,
+	IO_6_MA = 0x1b,
 };
 #endif /* __SOC_MEDIATEK_MT8195_IOCFG_H__ */
diff --git a/src/soc/mediatek/mt8195/pmif_spi.c b/src/soc/mediatek/mt8195/pmif_spi.c
index ddb2175..eff4a21 100644
--- a/src/soc/mediatek/mt8195/pmif_spi.c
+++ b/src/soc/mediatek/mt8195/pmif_spi.c
@@ -10,7 +10,7 @@

void pmif_spi_iocfg(void)
 {
-	/* Set SoC SPI IO driving strength to 4 mA */
-	SET32_BITFIELDS(&mtk_iocfg_bm->drv_cfg1, PWRAP_SPI0_DRIVING, IO_4_MA);
-	SET32_BITFIELDS(&mtk_iocfg_bm->drv_cfg2, PWRAP_SPI1_DRIVING, IO_4_MA);
+	/* Set SoC SPI IO driving strength to 6 mA */
+	SET32_BITFIELDS(&mtk_iocfg_bm->drv_cfg1, PWRAP_SPI0_DRIVING, IO_6_MA);
+	SET32_BITFIELDS(&mtk_iocfg_bm->drv_cfg2, PWRAP_SPI1_DRIVING, IO_6_MA);
 }