> -----Original Message----- > From: Lucas Stach [mailto:dev@xxxxxxxxxx] > Sent: 2021年5月9日 4:57 > To: Rob Herring <robh+dt@xxxxxxxxxx>; Ulf Hansson <ulf.hansson@xxxxxxxxxx>; > Adrian Hunter <adrian.hunter@xxxxxxxxx> > Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>; Fabio Estevam > <festevam@xxxxxxxxx>; linux-mmc@xxxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Subject: [PATCH 2/2] mmc: sdhci-esdhc-imx: add support for disabling HS400 > mode via DT > > On some boards the data strobe line isn't wired up, rendering HS400 support > broken, even if both the controller and the eMMC claim to support it. Allow to > disable HS400 mode via DT. > > Signed-off-by: Lucas Stach <dev@xxxxxxxxxx> > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c > b/drivers/mmc/host/sdhci-esdhc-imx.c > index a20459744d21..1d6068507fb6 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -1483,6 +1483,9 @@ sdhci_esdhc_imx_probe_dt(struct platform_device > *pdev, > if (of_find_property(np, "no-1-8-v", NULL)) > host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; > > + if (of_find_property(np, "no-mmc-hs400", NULL)) > + host->quirks2 &= ~SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400; > + Hi Lucas I suggest you move the change to mmc_of_parse() in drivers/mmc/core/host.c You also need to take care of the HS400ES mode. Regards Haibo Chen > if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line)) > boarddata->delay_line = 0; > > -- > 2.31.1
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