From 1af2d4697a3b229e84901d2bdd4ffba0eb2217de Mon Sep 17 00:00:00 2001 From: Frieder Schrempf Date: Mon, 27 Jun 2022 13:00:59 +0200 Subject: [PATCH] imx: kontron-sl-mx8mm: Enable PCA9450 regulator driver and fix SD card access 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 Reviewed-by: Fabio Estevam Tested-by: Fabio Estevam --- 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 2e9d52522b..727f99f006 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 -- 2.39.5