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mmc: sdhci-esdhc-imx: clear tuning bits during driver probe
The tuning bits like FBCLK_SEL, SMP_CLK_SEL and DLY_CELL which affects timing may have already been set by ROM if booting from SD3.0 mode like SDR104. Let's clear it first during driver probe before doing the new card enumeration to avoid working on the wrong timing. Note that tuning bits are dynamical settings which may need to be kept during MMC_PM_KEEP_POWER suspend, so we did not put them into hwinit function. Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -1224,6 +1224,11 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
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host->mmc->caps |= MMC_CAP_1_8V_DDR;
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if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
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host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
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/* clear tuning bits in case ROM has set it already */
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writel(0x0, host->ioaddr + ESDHC_MIX_CTRL);
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writel(0x0, host->ioaddr + SDHCI_ACMD12_ERR);
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writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
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}
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if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
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