diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2019-06-12 16:38:15 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2019-06-19 19:29:35 +0000 |
| commit | 1264d64a742e6f911b77dd8c63eeebdba94389a6 (patch) | |
| tree | c52901dbe4914ca2799c2652ef6422973703fb89 /src/mainboard/google/kahlee | |
| parent | ce2b2bad77716821235335cda9ede3849fb28e09 (diff) | |
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>
Diffstat (limited to 'src/mainboard/google/kahlee')
| -rw-r--r-- | src/mainboard/google/kahlee/variants/baseboard/mainboard.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/mainboard/google/kahlee/variants/baseboard/mainboard.c b/src/mainboard/google/kahlee/variants/baseboard/mainboard.c index 996e6102fc..95274eb85d 100644 --- a/src/mainboard/google/kahlee/variants/baseboard/mainboard.c +++ b/src/mainboard/google/kahlee/variants/baseboard/mainboard.c @@ -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); |