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]> --- 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
