[PATCH V2 3/8] ARM: dts: OMAP3: use twl4030 vdd1 regulator for CPU

[Nishanth Menon <nm@ti.com>]

Define VDD1 regulator in twl4030 DT and mark it as the supply for the
various OMAP34xx/35xx/36xx/37xx platforms (all use TWL4030 variants with
VDD1 supplying the CPU).

NOTE: This currently will use I2C1 bus communication path to set the
voltage in device tree boot. In the legacy non device tree boot, we
continue to use twl-common.c which bypasses I2C1 bus communication path
and uses I2C4 bus path using OMAP voltage libraries. We should
eventually be able to use I2C4 path once we have voltage regulator for
OMAP which is capable of using the voltage controller/voltage processor
IP blocks.

Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Jon Hunter <jon-hunter@ti.com>
Cc: "Benoît Cousson" <b-cousson@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Keerthy <j-keerthy@ti.com>
Cc: linux-omap@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: cpufreq@vger.kernel.org
Cc: linux-pm@vger.kernel.org

Signed-off-by: Nishanth Menon <nm@ti.com>
---
Changes in V2:
	- little more verbose commit log (no functional changes)
V1: https://patchwork.kernel.org/patch/2273701/

 arch/arm/boot/dts/omap3-beagle-xm.dts |    6 ++++++
 arch/arm/boot/dts/omap3-beagle.dts    |    6 ++++++
 arch/arm/boot/dts/omap3-evm.dts       |    6 ++++++
 arch/arm/boot/dts/twl4030.dtsi        |    6 ++++++
 4 files changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/omap3-beagle-xm.dts b/arch/arm/boot/dts/omap3-beagle-xm.dts
index 1177ff6..5a31964 100644
--- a/arch/arm/boot/dts/omap3-beagle-xm.dts
+++ b/arch/arm/boot/dts/omap3-beagle-xm.dts
@@ -13,6 +13,12 @@
 	model = "TI OMAP3 BeagleBoard xM";
 	compatible = "ti,omap3-beagle-xm, ti,omap3-beagle", "ti,omap3";
 
+	cpus {
+		cpu@0 {
+			cpu0-supply = <&vcc>;
+		};
+	};
+
 	memory {
 		device_type = "memory";
 		reg = <0x80000000 0x20000000>; /* 512 MB */
diff --git a/arch/arm/boot/dts/omap3-beagle.dts b/arch/arm/boot/dts/omap3-beagle.dts
index 418550c..07dea0a 100644
--- a/arch/arm/boot/dts/omap3-beagle.dts
+++ b/arch/arm/boot/dts/omap3-beagle.dts
@@ -13,6 +13,12 @@
 	model = "TI OMAP3 BeagleBoard";
 	compatible = "ti,omap3-beagle", "ti,omap3";
 
+	cpus {
+		cpu@0 {
+			cpu0-supply = <&vcc>;
+		};
+	};
+
 	memory {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>; /* 256 MB */
diff --git a/arch/arm/boot/dts/omap3-evm.dts b/arch/arm/boot/dts/omap3-evm.dts
index f14370e..05f51e1 100644
--- a/arch/arm/boot/dts/omap3-evm.dts
+++ b/arch/arm/boot/dts/omap3-evm.dts
@@ -13,6 +13,12 @@
 	model = "TI OMAP3 EVM (OMAP3530, AM/DM37x)";
 	compatible = "ti,omap3-evm", "ti,omap3";
 
+	cpus {
+		cpu@0 {
+			cpu0-supply = <&vcc>;
+		};
+	};
+
 	memory {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>; /* 256 MB */
diff --git a/arch/arm/boot/dts/twl4030.dtsi b/arch/arm/boot/dts/twl4030.dtsi
index 23c0cdd..b3034da 100644
--- a/arch/arm/boot/dts/twl4030.dtsi
+++ b/arch/arm/boot/dts/twl4030.dtsi
@@ -23,6 +23,12 @@
 		compatible = "ti,twl4030-wdt";
 	};
 
+	vcc: regulator-vdd1 {
+		compatible = "ti,twl4030-vdd1";
+		regulator-min-microvolt = <600000>;
+		regulator-max-microvolt = <1450000>;
+	};
+
 	vdac: regulator-vdac {
 		compatible = "ti,twl4030-vdac";
 		regulator-min-microvolt = <1800000>;
-- 
1.7.9.5