From ea6a3c7d24e4262a73768090b42c7220bf63ada9 Mon Sep 17 00:00:00 2001 From: Kevin Chiu Date: Tue, 14 Aug 2018 23:20:45 +0800 Subject: google/grunt: Remove BayHub EMMC driving strength override Side effect was observed that after override BayHub EMMC driving strength to the max, EMMC CLK will be reduced to 51.x Mhz from 200 Mhz. This will cause OS installation fail on Samsung EMMC sku. BUG=b:111964336 BRANCH=master TEST=emerge-grunt coreboot Change-Id: I848ab0cae474b15fbc4264c8ade63d5c6b4e489d Signed-off-by: Kevin Chiu Reviewed-on: https://review.coreboot.org/28084 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- .../google/kahlee/variants/baseboard/mainboard.c | 25 ---------------------- 1 file changed, 25 deletions(-) (limited to 'src') diff --git a/src/mainboard/google/kahlee/variants/baseboard/mainboard.c b/src/mainboard/google/kahlee/variants/baseboard/mainboard.c index b1bd4928d2..cf38b99073 100644 --- a/src/mainboard/google/kahlee/variants/baseboard/mainboard.c +++ b/src/mainboard/google/kahlee/variants/baseboard/mainboard.c @@ -17,8 +17,6 @@ #include #include #include -#include -#include uint8_t variant_board_sku(void) { @@ -37,26 +35,3 @@ void variant_mainboard_suspend_resume(void) gpio_set(GPIO_133, 0); } #endif - -void bh720_driving_strength(struct device *dev) -{ - u32 sdbar; - u32 bh720_pcr_data; - - sdbar = pci_read_config32(dev, PCI_BASE_ADDRESS_1); - - /* Enable Memory Access Function */ - write32((void *)(sdbar + BH720_MEM_ACCESS_EN), 0x40000000); - write32((void *)(sdbar + BH720_MEM_RW_DATA), 0x80000000); - write32((void *)(sdbar + BH720_MEM_RW_ADR), 0x800000D0); - - /* Read current EMMC 1.8V CLK/DATA,CMD driving strength */ - write32((void *)(sdbar + BH720_MEM_RW_ADR), 0x40000304); - bh720_pcr_data = read32((void *)(sdbar + BH720_MEM_RW_DATA)); - - /* set EMMC 1.8V CLK/DATA,CMD the max level */ - write32((void *)(sdbar + BH720_MEM_RW_DATA), - bh720_pcr_data | (BH720_PCR_CLK_DRV_MAX << 4) | - (BH720_PCR_DATA_CMD_DRV_MAX << 1)); - write32((void *)(sdbar + BH720_MEM_RW_ADR), 0x80000304); -} -- cgit v1.2.3