[RFC PATCH 12/15] ARM: dts: Add support of bus frequency using VDD_INT for exynos3250-rinato

[Chanwoo Choi]

This patch adds the bus device-tree node of INT (internal) block
to enable the bus frequency. The following sub-blocks share
the VDD_INT power source:
- LEFTBUS (parent device)
- RIGHTBUS
- PERIL
- LCD0
- FSYS
- MCUISP / ISP

The LEFTBUS is parent device with devfreq ondemand governor
and the rest devices has the dependency on LEFTBUS bus.

Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
---
 arch/arm/boot/dts/exynos3250-rinato.dts | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 61477943015b..9fc90d83968c 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -681,6 +681,42 @@
 	status = "okay";
 };
 
+&bus_leftbus {
+	devfreq-events = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>;
+	vdd-supply = <&buck3_reg>;
+	status = "okay";
+};
+
+&bus_rightbus {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_lcd0 {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_fsys {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_mcuisp {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_isp {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_peril {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
 &xusbxti {
 	clock-frequency = <24000000>;
 };
-- 
1.9.1

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