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grunt: Change Bayhub eMMC base clock to 200MHz 

The clock was previously set to 52MHz to workaround the fact that
depthcharge didn't support tuning.

Tuning has now been enabled in depthcharge:
https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/1655553

BUG=b:122244718
TEST=Verified on grunt that it speeds up boot by 130ms

Change-Id: If847cea2a7848bcd175958db86e652d4f710201a
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33430
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Raul E Rangel 2019-06-12 16:38:15 -06:00 committed by Martin Roth
parent ce2b2bad77
commit 1264d64a74
1 changed files with 12 additions and 2 deletions
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14
src/mainboard/google/kahlee/variants/baseboard/mainboard.c
View File

@ -61,12 +61,22 @@ void board_bh720(struct device *dev)
write32((void *)(sdbar + BH720_MEM_RW_ADR),
BH720_MEM_RW_WRITE | BH720_PCR_EMMC_SETTING);
/* Set Bayhub SD base CLK 50MHz: case#1 PCR 0x3E4[22] = 0 */
/* Set Base clock to 200MHz(PCR 0x304[31:16] = 0x2510) */
write32((void *)(sdbar + BH720_MEM_RW_ADR),
BH720_MEM_RW_READ | BH720_PCR_DrvStrength_PLL);
bh720_pcr_data = read32((void *)(sdbar + BH720_MEM_RW_DATA));
bh720_pcr_data &= 0x0000FFFF;
bh720_pcr_data |= 0x2510 << 16;
write32((void *)(sdbar + BH720_MEM_RW_DATA), bh720_pcr_data);
write32((void *)(sdbar + BH720_MEM_RW_ADR),
BH720_MEM_RW_WRITE | BH720_PCR_DrvStrength_PLL);
/* Use PLL Base clock PCR 0x3E4[22] = 1 */
write32((void *)(sdbar + BH720_MEM_RW_ADR),
BH720_MEM_RW_READ | BH720_PCR_CSR);
bh720_pcr_data = read32((void *)(sdbar + BH720_MEM_RW_DATA));
write32((void *)(sdbar + BH720_MEM_RW_DATA),
bh720_pcr_data & ~BH720_PCR_CSR_EMMC_MODE_SEL);
bh720_pcr_data | BH720_PCR_CSR_EMMC_MODE_SEL);
write32((void *)(sdbar + BH720_MEM_RW_ADR),
BH720_MEM_RW_WRITE | BH720_PCR_CSR);