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| author | Haibo Chen <haibo.chen@nxp.com> | 2020-02-19 09:25:50 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-03-24 14:35:41 +0100 |
| commit | f581e9093aa2820c315273fc0cbf7cb0294fd005 (patch) | |
| tree | 5d916915ccf115de362b54a15cf479279ca1c7a3 /drivers/mmc/host/sdhci-esdhc.h | |
| parent | mmc: sdhci-esdhc-imx: add strobe-dll-delay-target support (diff) | |
| download | linux-f581e9093aa2820c315273fc0cbf7cb0294fd005.tar.xz linux-f581e9093aa2820c315273fc0cbf7cb0294fd005.zip | |
mmc: sdhci-esdhc-imx: optimize the clock setting
When force clock off, check the SDOFF of register PRSSTAT to make sure
the clock is gate off. Before force clock on, check the SDSTB of register
PRSSTAT to make sure the clock is stable, this will eliminate the clock
glitch.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1582100757-20683-2-git-send-email-haibo.chen@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc.h')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h index 9289bb4d633e..947212f16bc6 100644 --- a/drivers/mmc/host/sdhci-esdhc.h +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -31,6 +31,7 @@ /* Present State Register */ #define ESDHC_PRSSTAT 0x24 +#define ESDHC_CLOCK_GATE_OFF 0x00000080 #define ESDHC_CLOCK_STABLE 0x00000008 /* Protocol Control Register */ |