On 12/07/16 10:46, Dong Aisheng wrote: > 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@xxxxxxx> Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c > index e5b5d1c3eb01..2bb326bbc34a 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -1224,6 +1224,11 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) > host->mmc->caps |= MMC_CAP_1_8V_DDR; > if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200)) > host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200; > + > + /* clear tuning bits in case ROM has set it already */ > + writel(0x0, host->ioaddr + ESDHC_MIX_CTRL); > + writel(0x0, host->ioaddr + SDHCI_ACMD12_ERR); > + writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); > } > > if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
