On Mon, Aug 17, 2026 at 11:31:51AM +0200, Linus Walleij wrote: > The Ux500 MMCI variant can control external level-shifter signal > directions through the power register. Parse the standard ST MMCI > device tree properties and set the corresponding direction and > feedback-clock bits. > > This is required by the external SD card slot on Samsung Janice, where > commands cannot reach the card unless the direction controls are set. > > Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Stephan Gerhold <[email protected]> > --- > drivers/mmc/arm_pl180_mmci.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c > index f00b0ff0dc95..af21b814641e 100644 > --- a/drivers/mmc/arm_pl180_mmci.c > +++ b/drivers/mmc/arm_pl180_mmci.c > @@ -427,6 +427,19 @@ static int arm_pl180_mmc_probe(struct udevice *dev) > host->version2 = false; /* ARM variant */ > } > > + if (dev_read_bool(dev, "st,sig-dir-dat0")) > + host->pwr_init |= SDI_PWR_DAT0DIREN; > + if (dev_read_bool(dev, "st,sig-dir-dat2")) > + host->pwr_init |= SDI_PWR_DAT2DIREN; > + if (dev_read_bool(dev, "st,sig-dir-dat31")) > + host->pwr_init |= SDI_PWR_DAT31DIREN; > + if (dev_read_bool(dev, "st,sig-dir-dat74")) > + host->pwr_init |= SDI_PWR_DAT74DIREN; > + if (dev_read_bool(dev, "st,sig-dir-cmd")) > + host->pwr_init |= SDI_PWR_CMDDIREN; > + if (dev_read_bool(dev, "st,sig-pin-fbclk")) > + host->pwr_init |= SDI_PWR_FBCLKEN; > + > gpio_request_by_name(dev, "cd-gpios", 0, &host->cd_gpio, GPIOD_IS_IN); > > ret = mmc_of_parse(dev, cfg); > > -- > 2.55.0 >
