Commit a98c557e authored Dec 20, 2018 by BOUGH CHEN Committed by Ulf Hansson Feb 25, 2019

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: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 4f100012

drivers/mmc/host/sdhci-esdhc-imx.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -1120,6 +1120,15 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
		<< ESDHC_TUNING_STEP_SHIFT;
		}
		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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