ARM: dts: meson8b-odroidc1: add microSD support

The Odroid C1 features a microSD slot. This patch adds the necessary
DT bindings to support it.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

2 files changed, 66 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts
index d5e83051bb54..3a5603d95b70 100644
--- a/arch/arm/boot/dts/meson8b-odroidc1.dts
+++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
@@ -54,6 +54,7 @@
 
         aliases {
                 serial0 = &uart_AO;
+                mmc0 = &sd_card_slot;
         };
 
         memory {
@@ -69,6 +70,37 @@
                         default-state = "off";
                 };
         };
+
+        tflash_vdd: regulator-tflash_vdd {
+                /*
+                 * signal name from schematics: TFLASH_VDD_EN
+                 */
+                compatible = "regulator-fixed";
+
+                regulator-name = "TFLASH_VDD";
+                regulator-min-microvolt = <3300000>;
+                regulator-max-microvolt = <3300000>;
+
+                gpio = <&gpio GPIOY_12 GPIO_ACTIVE_HIGH>;
+                enable-active-high;
+        };
+
+        tf_io: gpio-regulator-tf_io {
+                compatible = "regulator-gpio";
+
+                regulator-name = "TF_IO";
+                regulator-min-microvolt = <1800000>;
+                regulator-max-microvolt = <3300000>;
+
+                /*
+                 * signal name from schematics: TF_3V3N_1V8_EN
+                 */
+                gpios = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>;
+                gpios-states = <0>;
+
+                states = <3300000 0
+                          1800000 1>;
+        };
 };
 
 &uart_AO {
@@ -100,6 +132,32 @@
         status = "okay";
 };
 
+&sdio {
+        status = "okay";
+
+        pinctrl-0 = <&sd_b_pins>;
+        pinctrl-names = "default";
+
+        /* SD card */
+        sd_card_slot: slot@1 {
+                compatible = "mmc-slot";
+                reg = <1>;
+                status = "okay";
+
+                bus-width = <4>;
+                no-sdio;
+                cap-mmc-highspeed;
+                cap-sd-highspeed;
+                disable-wp;
+
+                cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
+                cd-inverted;
+
+                vmmc-supply = <&tflash_vdd>;
+                vqmmc-supply = <&tf_io>;
+        };
+};
+
 &ethmac {
         status = "okay";
 
diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index 5f7841b2d163..f9eceab4e3db 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -206,6 +206,14 @@
                                 function = "ethernet";
                         };
                 };
+
+                sd_b_pins: sd-b {
+                        mux {
+                                groups = "sd_d0_b", "sd_d1_b", "sd_d2_b",
+                                        "sd_d3_b", "sd_clk_b", "sd_cmd_b";
+                                function = "sd_b";
+                        };
+                };
         };
 };