On 15/04/16 20:29, 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 hw initialization before do the > new card enumeration. > > For system resume case, it's safe to clear them too since the following > card re-initialization in mmc_xx_init_card() will do retuning and set > correct value again. > > 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 98aa6b5..6a699d1 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -1018,6 +1018,11 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host) > } > writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL); > } > + > + /* 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); > } > } > > -- 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
