ARM: dts: exynos: Add DMC bus frequency for exynos3250-rinato/monk

This patch adds the DMC (Dynamic Memory Controller) bus frequency node
which includes the devfreq-events and regulator properties. The bus
frequency support the DVFS (Dynamic Voltage Frequency Scaling) feature
with ondemand governor.

The devfreq-events (ppmu_dmc0*) can monitor the utilization of DMC bus
on runtime and the buck1_reg (VDD_MIF power line) supplies the power to
the DMC block.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

diff --git a/arch/arm/boot/dts/exynos3250-monk.dts b/arch/arm/boot/dts/exynos3250-monk.dts
index 9e2840b59ae8520582717eb85369780090de7416..1fd7ecb5c41581c4377d5d3927d5f33790d02aef 100644 (file)
--- a/arch/arm/boot/dts/exynos3250-monk.dts
+++ b/arch/arm/boot/dts/exynos3250-monk.dts
@@ -156,6 +156,12 @@
        };
 };
 
+&bus_dmc {
+       devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
+       vdd-supply = <&buck1_reg>;
+       status = "okay";
+};
+
 &cpu0 {
        cpu0-supply = <&buck2_reg>;
 };

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 1f102f3a1ab1117fd6dae8974878ca4188d03de7..5175bd7e015f81c4b2db3e31bb3719dc95f35235 100644 (file)
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -147,6 +147,12 @@
        };
 };
 
+&bus_dmc {
+       devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
+       vdd-supply = <&buck1_reg>;
+       status = "okay";
+};
+
 &cpu0 {
        cpu0-supply = <&buck2_reg>;
 };