ARM: dts: exynos: Add LDO28 regulator on Exynos5422 Odroid boards

The LDO28 is used only on Odroid XU3 for Display Port.  Define it so DTS
will describe entire hardware.

Depending on bootloader behavior this might affect the Display Port
because none of drivers are enabling it. By default it is off in S2MPS11
PMIC reset values.  However it could be enabled by bootloader so in such
case kernel will later disable it as unused regulator.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
index b0dc9cc..2fac4ba 100644 (file)
--- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
@@ -331,6 +331,13 @@
                                regulator-always-on;
                        };
 
+                       ldo28_reg: LDO28 {
+                               /* Used on XU3 */
+                               regulator-name = "vdd_ldo28";
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
+                       };
+
                        ldo29_reg: LDO29 {
                                /* Unused */
                                regulator-name = "vdd_ldo29";

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3.dts b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
index 0322f28..db0bc17 100644 (file)
--- a/arch/arm/boot/dts/exynos5422-odroidxu3.dts
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
@@ -49,6 +49,12 @@
        };
 };
 
+&ldo28_reg {
+       regulator-name = "dp_p3v3";
+       regulator-min-microvolt = <3300000>;
+       regulator-max-microvolt = <3300000>;
+};
+
 &pwm {
        /*
         * PWM 0 -- fan