linux-kernel - [PATCH v3 18/20] ARM: dts: Add support of bus frequency using VDD

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Message-id: <1449810479-14763-19-git-send-email-cw00.choi@samsung.com>
Date:	Fri, 11 Dec 2015 14:07:57 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	myungjoo.ham@...sung.com, k.kozlowski@...sung.com, kgene@...nel.org
Cc:	kyungmin.park@...sung.com, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, linux@....linux.org.uk,
	tjakobi@...h.uni-bielefeld.de, linux.amoon@...il.com,
	cw00.choi@...sung.com, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH v3 18/20] ARM: dts: Add support of bus frequency using VDD_INT
 for exynos3250-rinato

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

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@...sung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
---
 arch/arm/boot/dts/exynos3250-rinato.dts | 41 +++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 2a1c22598fdc..37c777cad953 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -154,6 +154,47 @@
 	status = "okay";
 };
 
+&bus_fsys {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_isp {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_lcd0 {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_leftbus {
+	devfreq-events = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>;
+	vdd-supply = <&buck3_reg>;
+	status = "okay";
+};
+
+&bus_mfc {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_mcuisp {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_peril {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
+&bus_rightbus {
+	devfreq = <&bus_leftbus>;
+	status = "okay";
+};
+
 &cpu0 {
 	cpu0-supply = <&buck2_reg>;
 };
-- 
1.9.1

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