On 2020/6/19 1:56, Robin Murphy wrote:
This reverts commit 82f4b67f018c88a7cc9337f0067ed3d6ec352648.
According to a subsequent revert in the vendor kernel, the original
change was based on unclear documentation and was in fact incorrect.
Reviewed-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Emprically, my board's HS200 eMMC at 200MHZ apparently gets lucky with a
phase where this had no impact, but limiting max-frequency to 150MHz to
match the nominal capability of the I/O pins made it virtually unusable,
constantly throwing errors and retuning. With this revert, it starts
behaving perfectly at 150MHz too.
Fixes: 82f4b67f018c ("clk: rockchip: fix wrong mmc sample phase shift for rk3328")
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---
Resending with the edited commit log I actually meant, rather than the
earlier draft I managed to generate the previuous patch from, since that
one seems to have slipped through the cracks anyway.
ybetter commit message
drivers/clk/rockchip/clk-rk3328.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/rockchip/clk-rk3328.c b/drivers/clk/rockchip/clk-rk3328.c
index c186a1985bf4..2429b7c2a8b3 100644
--- a/drivers/clk/rockchip/clk-rk3328.c
+++ b/drivers/clk/rockchip/clk-rk3328.c
@@ -808,22 +808,22 @@ static struct rockchip_clk_branch rk3328_clk_branches[] __initdata = {
MMC(SCLK_SDMMC_DRV, "sdmmc_drv", "clk_sdmmc",
RK3328_SDMMC_CON0, 1),
MMC(SCLK_SDMMC_SAMPLE, "sdmmc_sample", "clk_sdmmc",
- RK3328_SDMMC_CON1, 0),
+ RK3328_SDMMC_CON1, 1),
MMC(SCLK_SDIO_DRV, "sdio_drv", "clk_sdio",
RK3328_SDIO_CON0, 1),
MMC(SCLK_SDIO_SAMPLE, "sdio_sample", "clk_sdio",
- RK3328_SDIO_CON1, 0),
+ RK3328_SDIO_CON1, 1),
MMC(SCLK_EMMC_DRV, "emmc_drv", "clk_emmc",
RK3328_EMMC_CON0, 1),
MMC(SCLK_EMMC_SAMPLE, "emmc_sample", "clk_emmc",
- RK3328_EMMC_CON1, 0),
+ RK3328_EMMC_CON1, 1),
MMC(SCLK_SDMMC_EXT_DRV, "sdmmc_ext_drv", "clk_sdmmc_ext",
RK3328_SDMMC_EXT_CON0, 1),
MMC(SCLK_SDMMC_EXT_SAMPLE, "sdmmc_ext_sample", "clk_sdmmc_ext",
- RK3328_SDMMC_EXT_CON1, 0),
+ RK3328_SDMMC_EXT_CON1, 1),
};
static const char *const rk3328_critical_clocks[] __initconst = {
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