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[LTSI-3.14,800/894] ARM: shmobile: lager: Add VDD MPU regulator for DVFS

Message ID 1409209620-24487-801-git-send-email-horms+renesas@verge.net.au (mailing list archive)
State New, archived
Headers show

Commit Message

Simon Horman Aug. 28, 2014, 7:05 a.m. UTC 
From: Benoit Cousson <bcousson@baylibre.com>

The CA15 cluster is capable of voltage scaling. Add the regulator
in the i2c3 node, to allow the generic CPUFreq driver to use it.

Enable the i2c3 pin mux and the device node as well since the
da9210 is connected to that bus.

Note: In R-CAR Gen2, each frequency is using the same voltage,
and DVS control is not used. Therefore, this patch set the
voltage(Vmin/Vmax) to 1000mv.

Signed-off-by: Benoit Cousson <bcousson@baylibre.com>
[gaku.inami.xw@bp.renesas.com: Changes Vmin for disabling DVS]
Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

(cherry picked from commit 05f72e03b7553958609d1475c79491f90e6b50d3)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 arch/arm/boot/dts/r8a7790-lager.dts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
diff mbox

Patch

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 9becef7..8428204 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -204,6 +204,11 @@ 
 				 "msiof1_tx";
 		renesas,function = "msiof1";
 	};
+
+	i2c3_pins: i2c3 {
+		renesas,groups = "i2c3";
+		renesas,function = "i2c3";
+	};
 };
 
 &ether {
@@ -317,3 +322,19 @@ 
 	cd-gpios = <&gpio3 22 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };
+
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3_pins>;
+	status = "okay";
+
+	vdd_dvfs: regulator@68 {
+		compatible = "diasemi,da9210";
+		reg = <0x68>;
+
+		regulator-min-microvolt = <1000000>;
+		regulator-max-microvolt = <1000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};