ARM: ux500: Add node for the MMC GPIO regulator

There is a very simple mechanism to change and SDI's voltage which
consists of toggling some GPIOs. This scenario can be better handled
if we convert it to a GPIO regulator. This patch provides one which
can be read from Device Tree.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/dbx5x0.dtsi b/arch/arm/boot/dts/dbx5x0.dtsi
index 3b4298bc0bf9..7ce45fc461fb 100644
--- a/arch/arm/boot/dts/dbx5x0.dtsi
+++ b/arch/arm/boot/dts/dbx5x0.dtsi
@@ -629,5 +629,19 @@
                         ranges = <0 0x50000000 0x4000000>;
                         status = "disabled";
                 };
+
+                vmmci: regulator-gpio {
+                        compatible = "regulator-gpio";
+
+                        regulator-min-microvolt = <1800000>;
+                        regulator-max-microvolt = <2600000>;
+                        regulator-name = "mmci-reg";
+                        regulator-type = "voltage";
+
+                        gpios = <&tc3589x_gpio 18 0x4>;
+                        gpio-enable = <&tc3589x_gpio 17 0x4>;
+                        states = <1800000 0x1
+                                  2900000 0x0>;
+                };
         };
 };