linux-kernel - [PATCH v6 16/21] ARM: dts: Add bus nodes using VDD

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Message-id: <1459121890-4601-17-git-send-email-cw00.choi@samsung.com>
Date:	Mon, 28 Mar 2016 08:38:05 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	k.kozlowski@...sung.com, kgene@...nel.org
Cc:	rjw@...ysocki.net, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, linux@....linux.org.uk,
	linux.amoon@...il.com, m.reichl@...etechno.de,
	tjakobi@...h.uni-bielefeld.de, inki.dae@...sung.com,
	cw00.choi@...sung.com, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH v6 16/21] ARM: dts: Add bus nodes using VDD_INT for Exynos4x12

This patch adds the bus nodes using VDD_INT for Exynos4x12 SoC.
Exynos4x12 has the following AXI buses to translate data between
DRAM and sub-blocks.

Following list specifies the detailed relation between DRAM and sub-blocks:
- ACLK100 clock for PERIL/PERIR/MFC(PCLK)
- ACLK160 clock for CAM/TV/LCD
: The minimum clock of ACLK160 should be over 160MHz.
  When drop the clock under 160MHz, show the broken image.
- ACLK133 clock for FSYS
- GDL clock for LEFTBUS
- GDR clock for RIGHTBUS
- SCLK_MFC clock for MFC

Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
[m.reichl and linux.amoon: Tested it on exynos4412-odroidu3 board]
Tested-by: Markus Reichl <m.reichl@...etechno.de>
Tested-by: Anand Moon <linux.amoon@...il.com>
---
 arch/arm/boot/dts/exynos4x12.dtsi | 106 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4x12.dtsi b/arch/arm/boot/dts/exynos4x12.dtsi
index 99a0f4ca3d47..e5173107ed44 100644
--- a/arch/arm/boot/dts/exynos4x12.dtsi
+++ b/arch/arm/boot/dts/exynos4x12.dtsi
@@ -349,6 +349,112 @@
 			opp-hz = /bits/ 64 <267000000>;
 		};
 	};
+
+	bus_leftbus: bus_leftbus {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_DIV_GDL>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_leftbus_opp_table>;
+		status = "disabled";
+	};
+
+	bus_rightbus: bus_rightbus {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_DIV_GDR>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_leftbus_opp_table>;
+		status = "disabled";
+	};
+
+	bus_display: bus_display {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_ACLK160>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_display_opp_table>;
+		status = "disabled";
+	};
+
+	bus_fsys: bus_fsys {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_ACLK133>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_fsys_opp_table>;
+		status = "disabled";
+	};
+
+	bus_peri: bus_peri {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_ACLK100>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_peri_opp_table>;
+		status = "disabled";
+	};
+
+	bus_mfc: bus_mfc {
+		compatible = "samsung,exynos-bus";
+		clocks = <&clock CLK_SCLK_MFC>;
+		clock-names = "bus";
+		operating-points-v2 = <&bus_leftbus_opp_table>;
+		status = "disabled";
+	};
+
+	bus_leftbus_opp_table: opp_table3 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp@...000000 {
+			opp-hz = /bits/ 64 <100000000>;
+			opp-microvolt = <900000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <134000000>;
+			opp-microvolt = <925000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <160000000>;
+			opp-microvolt = <950000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <200000000>;
+			opp-microvolt = <1000000>;
+		};
+	};
+
+	bus_display_opp_table: opp_table4 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp@...000000 {
+			opp-hz = /bits/ 64 <160000000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <200000000>;
+		};
+	};
+
+	bus_fsys_opp_table: opp_table5 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp@...000000 {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <134000000>;
+		};
+	};
+
+	bus_peri_opp_table: opp_table6 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp@...00000 {
+			opp-hz = /bits/ 64 <50000000>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+	};
 };
 
 &combiner {
-- 
1.9.1