ARM: dts: Work around lack of cpufreq regulator lookup for exynos4210-origen and trats boards

Exynos cpufreq drivers does not support device tree based regulator
lookup, so it can get the VDD ARM regulator only by its name. To get
cpufreq working for now, this patch works this around by renaming the
regulator in board dts files to vdd_arm, which is the name expected by
the driver.

This fixes a regression introduced by dropping support of board file
based bootup of Exynos 4210 boards that rendered cpufreq inoperable on
Trats and Origen boards.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 12 insertions, 2 deletions

diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
index 382d8c7e2906..46378fee2a13 100644
--- a/arch/arm/boot/dts/exynos4210-origen.dts
+++ b/arch/arm/boot/dts/exynos4210-origen.dts
@@ -192,7 +192,12 @@
                                 };
 
                                 buck1_reg: BUCK1 {
-                                        regulator-name = "VDD_ARM_1.2V";
+                                        /*
+                                        * HACK: The real name is VDD_ARM_1.2V,
+                                        * but exynos-cpufreq does not support
+                                        * DT-based regulator lookup yet.
+                                        */
+                                        regulator-name = "vdd_arm";
                                         regulator-min-microvolt = <950000>;
                                         regulator-max-microvolt = <1350000>;
                                         regulator-always-on;
diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
index 1c164f234bcc..63cc571ca307 100644
--- a/arch/arm/boot/dts/exynos4210-trats.dts
+++ b/arch/arm/boot/dts/exynos4210-trats.dts
@@ -290,7 +290,12 @@
                                 };
 
                                 varm_breg: BUCK1 {
-                                     regulator-name = "VARM_1.2V_C210";
+                                     /*
+                                      * HACK: The real name is VARM_1.2V_C210,
+                                      * but exynos-cpufreq does not support
+                                      * DT-based regulator lookup yet.
+                                      */
+                                     regulator-name = "vdd_arm";
                                      regulator-min-microvolt = <900000>;
                                      regulator-max-microvolt = <1350000>;
                                      regulator-always-on;