Commit a98c557e authored by BOUGH CHEN's avatar BOUGH CHEN Committed by Ulf Hansson

mmc: sdhci-esdhc-imx: clear ESDHC_STD_TUNING_EN for manual tuning method

The bit ESDHC_STD_TUNING_EN may be configed by bootloader code if it
choose to use standard tuning method. So on linux side, if choose to
use manual tuning method, need to clear the bit ESDHC_STD_TUNING_EN,
remove the impact of bootloader code.
Signed-off-by: default avatarHaibo Chen <haibo.chen@nxp.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 4f100012
...@@ -1120,6 +1120,15 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host) ...@@ -1120,6 +1120,15 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
<< ESDHC_TUNING_STEP_SHIFT; << ESDHC_TUNING_STEP_SHIFT;
} }
writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL); writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
} else if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
/*
* ESDHC_STD_TUNING_EN may be configed in bootloader
* or ROM code, so clear this bit here to make sure
* the manual tuning can work.
*/
tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
tmp &= ~ESDHC_STD_TUNING_EN;
writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
} }
} }
} }
......
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