On Mon, Jun 27, 2022 at 8:01 AM Frieder Schrempf <frie...@fris.de> wrote: > > From: Frieder Schrempf <frieder.schre...@kontron.de> > > Currently accessing the SD card on USDHC2 fails with: > > => mmc dev 1 > Card did not respond to voltage select! : -110 > > This is due to the fact that UHS modes are enabled in the defconfig > and the devicetree, but the referenced LDO5 regulator (reg_nvcc_sd) > is not available to switch the data lines from 3.3V to 1.8V mode. > > By enabling the regulator driver the vqmmc-supply is now available > and the SD card works also in high speed modes: > > => mmc dev 1 > switch to partitions #0, OK > mmc1 is current device > > Please note that the board has a GPIO connected to the SD_VSEL signal > of the PMIC. As the driver uses the LDO5CTRL_H register to set the > voltage, we need to make sure that this GPIO (GPIO01_IO4) is set to > a high level. > > Signed-off-by: Frieder Schrempf <frieder.schre...@kontron.de> > Reviewed-by: Fabio Estevam <feste...@denx.de>
Tested-by: Fabio Estevam <feste...@denx.de>