[RFC PATCHv2 7/8] ARM: dts: Add memory bus node for Exynos3250-based Rinato board

[Chanwoo Choi <cw00.choi@samsung.com>]

This patch adds the Exynos3250 memory-bus node which includes the regulator
and devfreq-event phandle. The devfreq-event phandle is used for the
governor of devfreq device and provide the current usage state of
MIF (Memory Interface) / INT (Internal) memory bus group.

Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Myungjoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 arch/arm/boot/dts/exynos3250-rinato.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 60948ae..6722555 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -564,6 +564,18 @@
 	};
 };
 
+&memory_bus_mif {
+	devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
+	vdd-mem-supply = <&buck1_reg>;
+	status = "okay";
+};
+
+&memory_bus_int {
+	devfreq-events = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>;
+	vdd-mem-supply = <&buck3_reg>;
+	status = "okay";
+};
+
 &xusbxti {
 	clock-frequency = <24000000>;
 };
-- 
1.8.5.5