ARM: dts: exynos: Disable unused PMIC regulators on Exynos5422 Odroid boards

Disable unused PMIC regulators on Exynos5422 Odroid boards to reduce
energy used. According to schematics:
1. LDO12, LDO16 and LDO24 are not connected,
2. LDO26 is not used on Odroid HC1.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
[backport of mainline commit b5124e4507939e6a254968091148759de37947bb]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: I1dc3fe5991857c6bb54691212f7c624362235360

diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
index f881969..50f40c1 100644 (file)
--- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
@@ -235,10 +235,10 @@
                        };
 
                        ldo12_reg: LDO12 {
+                               /* Unused */
                                regulator-name = "vdd_ldo12";
-                               regulator-min-microvolt = <1800000>;
-                               regulator-max-microvolt = <1800000>;
-                               regulator-always-on;
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <2375000>;
                        };
 
                        ldo13_reg: LDO13 {
@@ -262,10 +262,10 @@
                        };
 
                        ldo16_reg: LDO16 {
+                               /* Unused */
                                regulator-name = "vdd_ldo16";
-                               regulator-min-microvolt = <2200000>;
-                               regulator-max-microvolt = <2200000>;
-                               regulator-always-on;
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
                        };
 
                        ldo17_reg: LDO17 {
@@ -316,10 +316,10 @@
                        };
 
                        ldo24_reg: LDO24 {
-                               regulator-name = "tsp_io";
-                               regulator-min-microvolt = <2800000>;
-                               regulator-max-microvolt = <2800000>;
-                               regulator-always-on;
+                               /* Unused */
+                               regulator-name = "vdd_ldo24";
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
                        };
 
                        ldo25_reg: LDO25 {
@@ -330,10 +330,10 @@
                        };
 
                        ldo26_reg: LDO26 {
+                               /* Used on XU3, XU3-Lite and XU4 */
                                regulator-name = "vdd_ldo26";
-                               regulator-min-microvolt = <3000000>;
-                               regulator-max-microvolt = <3000000>;
-                               regulator-always-on;
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
                        };
 
                        ldo27_reg: LDO27 {

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
index c916fb0..4f68491 100644 (file)
--- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
@@ -378,6 +378,12 @@
        status = "okay";
 };
 
+&ldo26_reg {
+       regulator-min-microvolt = <3000000>;
+       regulator-max-microvolt = <3000000>;
+       regulator-always-on;
+};
+
 &mixer {
        status = "okay";
 };