diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-02-07 22:35:59 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-14 09:10:58 +0100 |
| commit | e21e6fdd2935e147f845de7ddf39d6204a075a46 (patch) | |
| tree | 7e74a7f27b648d722021740e44ccc0b82abc8cd6 /drivers/mmc | |
| parent | 62d721a646a9d515bd7b13bede78a1c02890b956 (diff) | |
| download | linux-e21e6fdd2935e147f845de7ddf39d6204a075a46.tar.gz linux-e21e6fdd2935e147f845de7ddf39d6204a075a46.tar.xz | |
mmc: meson-gx: add support for HS400 mode
Add support for HS400 mode.
The driver still misses support for tuning, therefore
highspeed modes like HS400 might not work under all
circumstances yet.
Successfully tested on a Odroid C2 (S905 GXBB).
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 3cc6334acdb1..5a959783304b 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -83,6 +83,7 @@ #define CFG_RC_CC_MASK 0xf #define CFG_STOP_CLOCK BIT(22) #define CFG_CLK_ALWAYS_ON BIT(18) +#define CFG_CHK_DS BIT(20) #define CFG_AUTO_CLK BIT(23) #define SD_EMMC_STATUS 0x48 @@ -408,6 +409,16 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) val &= ~(CFG_RC_CC_MASK << CFG_RC_CC_SHIFT); val |= ilog2(SD_EMMC_CFG_CMD_GAP) << CFG_RC_CC_SHIFT; + val &= ~CFG_DDR; + if (ios->timing == MMC_TIMING_UHS_DDR50 || + ios->timing == MMC_TIMING_MMC_DDR52 || + ios->timing == MMC_TIMING_MMC_HS400) + val |= CFG_DDR; + + val &= ~CFG_CHK_DS; + if (ios->timing == MMC_TIMING_MMC_HS400) + val |= CFG_CHK_DS; + writel(val, host->regs + SD_EMMC_CFG); if (val != orig) |