Add uSD support for RoseapplePi SBC using a fixed regulator as a
temporary solution until PMIC support becomes available.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxx>
---
arch/arm/boot/dts/owl-s500-roseapplepi.dts | 50 ++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/arch/arm/boot/dts/owl-s500-roseapplepi.dts b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
index 800edf5d2d12..0a916b6c83a8 100644
--- a/arch/arm/boot/dts/owl-s500-roseapplepi.dts
+++ b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
@@ -14,6 +14,7 @@ / {
model = "Roseapple Pi";
aliases {
+ mmc0 = &mmc0;
serial2 = &uart2;
};
@@ -25,6 +26,55 @@ memory@0 {
device_type = "memory";
reg = <0x0 0x80000000>; /* 2GB */
};
+
+ /* Fixed regulator used in the absence of PMIC */
+ sd_vcc: sd-vcc {
+ compatible = "regulator-fixed";
+ regulator-name = "fixed-3.1V";
+ regulator-min-microvolt = <3100000>;
+ regulator-max-microvolt = <3100000>;
+ regulator-always-on;
+ };
+};
+
+&pinctrl {
+ mmc0_default: mmc0_default {
+ pinmux {
+ groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
+ "sd0_cmd_mfp", "sd0_clk_mfp";
+ function = "sd0";
+ };
+
+ drv_pinconf {
+ groups = "sd0_d0_d3_drv", "sd0_cmd_drv", "sd0_clk_drv";
+ drive-strength = <8>;
+ };
+
+ bias0_pinconf {
+ pins = "sd0_d0", "sd0_d1", "sd0_d2",
+ "sd0_d3", "sd0_cmd";
+ bias-pull-up;
+ };
+
+ bias1_pinconf {
+ pins = "sd0_clk";
+ bias-pull-down;
+ };
+ };
+};
+
+/* uSD */
+&mmc0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&mmc0_default>;
+ no-sdio;
+ no-mmc;
+ no-1-8-v;
+ cd-gpios = <&pinctrl 117 GPIO_ACTIVE_LOW>;
+ bus-width = <4>;
+ vmmc-supply = <&sd_vcc>;
+ vqmmc-supply = <&sd_vcc>;
};
&twd_timer {
--
2.27.0
