This change removes the "regulator-always-on" property from the "vcc3v0_sd" (vmmc-supply) and "vcc_sdio" (vqmmc-supply) regulators, which otherwise prevents the MMC driver from being able to power cycle the SD card as part of the initialization procedure.
It also removes the "regulator-boot-on" from the "vcc_sdio" regulator, which could theoretically damage a SD card that is already initialized in a low voltage mode.
Signed-off-by: Justin Klaassen justin@tidylabs.net ---
Changes in v2: - Added patch to remove device-tree properties that conflicted with MMC driver initialization
arch/arm/dts/rk3399-nanopi4-u-boot.dtsi | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi index 75736124996..ba2b73223d4 100644 --- a/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi +++ b/arch/arm/dts/rk3399-nanopi4-u-boot.dtsi @@ -19,8 +19,11 @@
&vcc3v0_sd { bootph-pre-ram; + /delete-property/ regulator-always-on; };
&vcc_sdio { + /delete-property/ regulator-always-on; + /delete-property/ regulator-boot-on; regulator-init-microvolt = <3000000>; };