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> --- Changes in v2: * Add Fabio's R-b (Thanks!) --- configs/kontron-sl-mx8mm_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/configs/kontron-sl-mx8mm_defconfig b/configs/kontron-sl-mx8mm_defconfig index 2e9d52522b2..727f99f0063 100644 --- a/configs/kontron-sl-mx8mm_defconfig +++ b/configs/kontron-sl-mx8mm_defconfig @@ -99,6 +99,7 @@ CONFIG_DM_PMIC=y CONFIG_DM_PMIC_PCA9450=y CONFIG_SPL_DM_PMIC_PCA9450=y CONFIG_DM_REGULATOR=y +CONFIG_DM_REGULATOR_PCA9450=y CONFIG_DM_RTC=y CONFIG_RTC_RV8803=y CONFIG_CONS_INDEX=2 -- 2.36.1
