> -----Original Message----- > From: Shawn Guo [mailto:shawnguo@xxxxxxxxxx] > Sent: 2021年3月26日 19:02 > To: Adrian Hunter <adrian.hunter@xxxxxxxxx>; Ulf Hansson > <ulf.hansson@xxxxxxxxxx> > Cc: Bough Chen <haibo.chen@xxxxxxx>; Aisheng Dong > <aisheng.dong@xxxxxxx>; Pengutronix Kernel Team > <kernel@xxxxxxxxxxxxxx>; dl-linux-imx <linux-imx@xxxxxxx>; > linux-mmc@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; Shawn Guo > <shawn.guo@xxxxxxxxxx> > Subject: [PATCH] mmc: sdhci-esdhc-imx: separate 100/200 MHz pinctrl states > check > > From: Shawn Guo <shawn.guo@xxxxxxxxxx> > > As indicated by function esdhc_change_pinstate(), SDR50 and DDR50 require > pins_100mhz, while SDR104 and HS400 require pins_200mhz. Some system > design may support SDR50 and DDR50 with 100mhz pin state only (without > 200mhz one). Currently the combined 100/200 MHz pinctrl state check > prevents such system from running SDR50 and DDR50. Separate the check to > support such system design. > > Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx> Reviewed-by: Haibo Chen <haibo.chen@xxxxxxx> > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c > b/drivers/mmc/host/sdhci-esdhc-imx.c > index a20459744d21..aa45901325b9 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -434,10 +434,10 @@ static u32 esdhc_readl_le(struct sdhci_host *host, > int reg) > * Do not advertise faster UHS modes if there are no > * pinctrl states for 100MHz/200MHz. > */ > - if (IS_ERR_OR_NULL(imx_data->pins_100mhz) || > - IS_ERR_OR_NULL(imx_data->pins_200mhz)) > - val &= ~(SDHCI_SUPPORT_SDR50 | > SDHCI_SUPPORT_DDR50 > - | SDHCI_SUPPORT_SDR104 | > SDHCI_SUPPORT_HS400); > + if (IS_ERR_OR_NULL(imx_data->pins_100mhz)) > + val &= ~(SDHCI_SUPPORT_SDR50 | > SDHCI_SUPPORT_DDR50); > + if (IS_ERR_OR_NULL(imx_data->pins_200mhz)) > + val &= ~(SDHCI_SUPPORT_SDR104 | > SDHCI_SUPPORT_HS400); > } > } > > -- > 2.17.1
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