ARM: shmobile: silk: add SDHI1 DT support

Define the SILK board dependent part of the SDHI1 (connected to micro-SD
slot) device nodes along with the necessary voltage regulators.

Based on the original patch by Vladimir Barinov
<vladimir.barinov@cogentembedded.com>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a7794-silk.dts b/arch/arm/boot/dts/r8a7794-silk.dts
index 48ff3e2958ae68d5e81b6713379cba6f2b100c3f..a49942b626c8cd2cc80b97c9196ff815f40d2d11 100644 (file)
--- a/arch/arm/boot/dts/r8a7794-silk.dts
+++ b/arch/arm/boot/dts/r8a7794-silk.dts
@@ -12,6 +12,7 @@
 
 /dts-v1/;
 #include "r8a7794.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 / {
        model = "SILK";
@@ -39,6 +40,30 @@
                regulator-boot-on;
                regulator-always-on;
        };
+
+       vcc_sdhi1: regulator@3 {
+               compatible = "regulator-fixed";
+
+               regulator-name = "SDHI1 Vcc";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+
+               gpio = <&gpio4 26 GPIO_ACTIVE_HIGH>;
+               enable-active-high;
+       };
+
+       vccq_sdhi1: regulator@4 {
+               compatible = "regulator-gpio";
+
+               regulator-name = "SDHI1 VccQ";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <3300000>;
+
+               gpios = <&gpio4 29 GPIO_ACTIVE_HIGH>;
+               gpios-states = <1>;
+               states = <3300000 1
+                         1800000 0>;
+       };
 };
 
 &extal_clk {
@@ -71,6 +96,11 @@
                renesas,function = "mmc";
        };
 
+       sdhi1_pins: sd1 {
+               renesas,groups = "sdhi1_data4", "sdhi1_ctrl";
+               renesas,function = "sdhi1";
+       };
+
        qspi_pins: spi0 {
                renesas,groups = "qspi_ctrl", "qspi_data4";
                renesas,function = "qspi";
@@ -147,6 +177,16 @@
        status = "okay";
 };
 
+&sdhi1 {
+       pinctrl-0 = <&sdhi1_pins>;
+       pinctrl-names = "default";
+
+       vmmc-supply = <&vcc_sdhi1>;
+       vqmmc-supply = <&vccq_sdhi1>;
+       cd-gpios = <&gpio6 14 GPIO_ACTIVE_LOW>;
+       status = "okay";
+};
+
 &qspi {
        pinctrl-0 = <&qspi_pins>;
        pinctrl-names = "default";