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mmc: sdhci-esdhc-imx: enable hw auto retuning for STD_TUNING

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Enable HW auto retuning when set SDHCI_CTRL_EXEC_TUNING and clear it
when clear SDHCI_CTRL_TUNED_CLK.

Acked-by: Adrian Hunter <[email protected]>
Signed-off-by: Dong Aisheng <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Dong Aisheng 2016-07-12 15:46:18 +08:00 • committed by Ulf Hansson
commit 0b330e3858
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/host/sdhci-esdhc-imx.c
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@ -45,6 +45,7 @@
#define ESDHC_MIX_CTRL_AC23EN (1 << 7)
#define ESDHC_MIX_CTRL_EXE_TUNE (1 << 22)
#define ESDHC_MIX_CTRL_SMPCLK_SEL (1 << 23)
#define ESDHC_MIX_CTRL_AUTO_TUNE_EN (1 << 24)
#define ESDHC_MIX_CTRL_FBCLK_SEL (1 << 25)
#define ESDHC_MIX_CTRL_HS400_EN (1 << 26)
/* Bits 3 and 6 are not SDHCI standard definitions */
@ -485,11 +486,13 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
} else {
v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
}
if (val & SDHCI_CTRL_EXEC_TUNING) {
v |= ESDHC_MIX_CTRL_EXE_TUNE;
m |= ESDHC_MIX_CTRL_FBCLK_SEL;
m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
tuning_ctrl = readl(host->ioaddr + ESDHC_TUNING_CTRL);
tuning_ctrl |= ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP_DEFAULT;
if (imx_data->boarddata.tuning_start_tap) {