arm64: dts: marvell: armada-3720-db: Add vqmmc regulator for SD slot

By adding this regulator, the SD cards are usable at higher speed
protocols such as SDR104.

This patch was tested with an SD HC card compatible with UHS-I.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-db.dts b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
index eab3bc7e638289da5095d4343f3b05471995dec9..9df0f06ce6070a4c17c724d52bb956504dc8e2b7 100644 (file)
--- a/arch/arm64/boot/dts/marvell/armada-3720-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
@@ -80,6 +80,20 @@
                compatible = "usb-nop-xceiv";
                vcc-supply = <&exp_usb3_vbus>;
        };
+
+       vcc_sd_reg1: regulator {
+               compatible = "regulator-gpio";
+               regulator-name = "vcc_sd1";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <3300000>;
+               regulator-boot-on;
+
+               gpios = <&gpiosb 23 GPIO_ACTIVE_HIGH>;
+               gpios-states = <0>;
+               states = <1800000 0x1
+                         3300000 0x0>;
+               enable-active-high;
+       };
 };
 
 /* Gigabit module on CON19(V2.0)/CON21(V1.4) */
@@ -164,6 +178,7 @@
        cd-gpios = <&gpiosb 2 GPIO_ACTIVE_LOW>;
        bus-width = <4>;
        marvell,pad-type = "sd";
+       vqmmc-supply = <&vcc_sd_reg1>;
        status = "okay";
 };