clk: samsung: exynos5433: Add binding document for Exynos5433 clock domains

This patch adds devicetree binding document for Exynos5433 SoC system clock
controller.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Documentation/devicetree/bindings/clock/exynos5433-clock.txt

+* Samsung Exynos5433 CMU (Clock Management Units)
+
+The Exynos5433 clock controller generates and supplies clock to various
+controllers within the Exynos5433 SoC.
+
+Required Properties:
+
+- compatible: should be one of the following.
+  - "samsung,exynos5433-cmu-top"   - clock controller compatible for CMU_TOP
+    which generates clocks for IMEM/FSYS/G3D/GSCL/HEVC/MSCL/G2D/MFC/PERIC/PERIS
+    domains and bus clocks.
+  - "samsung,exynos5433-cmu-cpif"  - clock controller compatible for CMU_CPIF
+    which generates clocks for LLI (Low Latency Interface) IP.
+  - "samsung,exynos5433-cmu-mif"   - clock controller compatible for CMU_MIF
+    which generates clocks for DRAM Memory Controller domain.
+  - "samsung,exynos5433-cmu-peric" - clock controller compatible for CMU_PERIC
+    which generates clocks for UART/I2C/SPI/I2S/PCM/SPDIF/PWM/SLIMBUS IPs.
+  - "samsung,exynos5433-cmu-peris" - clock controller compatible for CMU_PERIS
+    which generates clocks for PMU/TMU/MCT/WDT/RTC/SECKEY/TZPC IPs.
+  - "samsung,exynos5433-cmu-fsys"  - clock controller compatible for CMU_FSYS
+    which generates clocks for USB/UFS/SDMMC/TSI/PDMA IPs.
+  - "samsung,exynos5433-cmu-g2d"   - clock controller compatible for CMU_G2D
+    which generates clocks for G2D/MDMA IPs.
+  - "samsung,exynos5433-cmu-disp"  - clock controller compatible for CMU_DISP
+    which generates clocks for Display (DECON/HDMI/DSIM/MIXER) IPs.
+  - "samsung,exynos5433-cmu-aud"   - clock controller compatible for CMU_AUD
+    which generates clocks for Cortex-A5/BUS/AUDIO clocks.
+  - "samsung,exynos5433-cmu-bus0", "samsung,exynos5433-cmu-bus1"
+    and "samsung,exynos5433-cmu-bus2" - clock controller compatible for CMU_BUS
+    which generates global data buses clock and global peripheral buses clock.
+  - "samsung,exynos5433-cmu-g3d"  - clock controller compatible for CMU_G3D
+    which generates clocks for 3D Graphics Engine IP.
+  - "samsung,exynos5433-cmu-gscl"  - clock controller compatible for CMU_GSCL
+    which generates clocks for GSCALER IPs.
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+- clocks: list of the clock controller input clock identifiers,
+	from common clock bindings. Please refer the next section
+	to find the input clocks for a given controller.
+
+- clock-names: list of the clock controller input clock names,
+	as described in clock-bindings.txt.
+
+	Input clocks for top clock controller:
+		- oscclk
+		- sclk_mphy_pll
+		- sclk_mfc_pll
+		- sclk_bus_pll
+
+	Input clocks for cpif clock controller:
+		- oscclk
+
+	Input clocks for mif clock controller:
+		- oscclk
+		- sclk_mphy_pll
+
+	Input clocks for fsys clock controller:
+		- oscclk
+		- sclk_ufs_mphy
+		- div_aclk_fsys_200
+		- sclk_pcie_100_fsys
+		- sclk_ufsunipro_fsys
+		- sclk_mmc2_fsys
+		- sclk_mmc1_fsys
+		- sclk_mmc0_fsys
+		- sclk_usbhost30_fsys
+		- sclk_usbdrd30_fsys
+
+	Input clocks for g2d clock controller:
+		- oscclk
+		- aclk_g2d_266
+		- aclk_g2d_400
+
+	Input clocks for disp clock controller:
+		- oscclk
+		- sclk_dsim1_disp
+		- sclk_dsim0_disp
+		- sclk_dsd_disp
+		- sclk_decon_tv_eclk_disp
+		- sclk_decon_vclk_disp
+		- sclk_decon_eclk_disp
+		- sclk_decon_tv_vclk_disp
+		- aclk_disp_333
+
+	Input clocks for bus0 clock controller:
+		- aclk_bus0_400
+
+	Input clocks for bus1 clock controller:
+		- aclk_bus1_400
+
+	Input clocks for bus2 clock controller:
+		- oscclk
+		- aclk_bus2_400
+
+	Input clocks for g3d clock controller:
+		- oscclk
+		- aclk_g3d_400
+
+	Input clocks for gscl clock controller:
+		- oscclk
+		- aclk_gscl_111
+		- aclk_gscl_333
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume.
+
+All available clocks are defined as preprocessor macros in
+dt-bindings/clock/exynos5433.h header and can be used in device
+tree sources.
+
+Example 1: Examples of 'oscclk' source clock node are listed below.
+
+	xxti: xxti {
+		compatible = "fixed-clock";
+		clock-output-names = "oscclk";
+		#clock-cells = <0>;
+	};
+
+Example 2: Examples of clock controller nodes are listed below.
+
+	cmu_top: clock-controller@10030000 {
+		compatible = "samsung,exynos5433-cmu-top";
+		reg = <0x10030000 0x0c04>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"sclk_mphy_pll",
+			"sclk_mfc_pll",
+			"sclk_bus_pll";
+		clocks = <&xxti>,
+		       <&cmu_cpif CLK_SCLK_MPHY_PLL>,
+		       <&cmu_mif CLK_SCLK_MFC_PLL>,
+		       <&cmu_mif CLK_SCLK_BUS_PLL>;
+	};
+
+	cmu_cpif: clock-controller@10fc0000 {
+		compatible = "samsung,exynos5433-cmu-cpif";
+		reg = <0x10fc0000 0x0c04>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk";
+		clocks = <&xxti>;
+	};
+
+	cmu_mif: clock-controller@105b0000 {
+		compatible = "samsung,exynos5433-cmu-mif";
+		reg = <0x105b0000 0x100c>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"sclk_mphy_pll";
+		clocks = <&xxti>,
+		       <&cmu_cpif CLK_SCLK_MPHY_PLL>;
+	};
+
+	cmu_peric: clock-controller@14c80000 {
+		compatible = "samsung,exynos5433-cmu-peric";
+		reg = <0x14c80000 0x0b08>;
+		#clock-cells = <1>;
+	};
+
+	cmu_peris: clock-controller@10040000 {
+		compatible = "samsung,exynos5433-cmu-peris";
+		reg = <0x10040000 0x0b20>;
+		#clock-cells = <1>;
+	};
+
+	cmu_fsys: clock-controller@156e0000 {
+		compatible = "samsung,exynos5433-cmu-fsys";
+		reg = <0x156e0000 0x0b04>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"sclk_ufs_mphy",
+			"div_aclk_fsys_200",
+			"sclk_pcie_100_fsys",
+			"sclk_ufsunipro_fsys",
+			"sclk_mmc2_fsys",
+			"sclk_mmc1_fsys",
+			"sclk_mmc0_fsys",
+			"sclk_usbhost30_fsys",
+			"sclk_usbdrd30_fsys";
+		clocks = <&xxti>,
+		       <&cmu_cpif CLK_SCLK_UFS_MPHY>,
+		       <&cmu_top CLK_DIV_ACLK_FSYS_200>,
+		       <&cmu_top CLK_SCLK_PCIE_100_FSYS>,
+		       <&cmu_top CLK_SCLK_UFSUNIPRO_FSYS>,
+		       <&cmu_top CLK_SCLK_MMC2_FSYS>,
+		       <&cmu_top CLK_SCLK_MMC1_FSYS>,
+		       <&cmu_top CLK_SCLK_MMC0_FSYS>,
+		       <&cmu_top CLK_SCLK_USBHOST30_FSYS>,
+		       <&cmu_top CLK_SCLK_USBDRD30_FSYS>;
+	};
+
+	cmu_g2d: clock-controller@12460000 {
+		compatible = "samsung,exynos5433-cmu-g2d";
+		reg = <0x12460000 0x0b08>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"aclk_g2d_266",
+			"aclk_g2d_400";
+		clocks = <&xxti>,
+		       <&cmu_top CLK_ACLK_G2D_266>,
+		       <&cmu_top CLK_ACLK_G2D_400>;
+	};
+
+	cmu_disp: clock-controller@13b90000 {
+		compatible = "samsung,exynos5433-cmu-disp";
+		reg = <0x13b90000 0x0c04>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"sclk_dsim1_disp",
+			"sclk_dsim0_disp",
+			"sclk_dsd_disp",
+			"sclk_decon_tv_eclk_disp",
+			"sclk_decon_vclk_disp",
+			"sclk_decon_eclk_disp",
+			"sclk_decon_tv_vclk_disp",
+			"aclk_disp_333";
+		clocks = <&xxti>,
+		       <&cmu_mif CLK_SCLK_DSIM1_DISP>,
+		       <&cmu_mif CLK_SCLK_DSIM0_DISP>,
+		       <&cmu_mif CLK_SCLK_DSD_DISP>,
+		       <&cmu_mif CLK_SCLK_DECON_TV_ECLK_DISP>,
+		       <&cmu_mif CLK_SCLK_DECON_VCLK_DISP>,
+		       <&cmu_mif CLK_SCLK_DECON_ECLK_DISP>,
+		       <&cmu_mif CLK_SCLK_DECON_TV_VCLK_DISP>,
+		       <&cmu_mif CLK_ACLK_DISP_333>;
+	};
+
+	cmu_aud: clock-controller@114c0000 {
+		compatible = "samsung,exynos5433-cmu-aud";
+		reg = <0x114c0000 0x0b04>;
+		#clock-cells = <1>;
+	};
+
+	cmu_bus0: clock-controller@13600000 {
+		compatible = "samsung,exynos5433-cmu-bus0";
+		reg = <0x13600000 0x0b04>;
+		#clock-cells = <1>;
+
+		clock-names = "aclk_bus0_400";
+		clocks = <&cmu_top CLK_ACLK_BUS0_400>;
+	};
+
+	cmu_bus1: clock-controller@14800000 {
+		compatible = "samsung,exynos5433-cmu-bus1";
+		reg = <0x14800000 0x0b04>;
+		#clock-cells = <1>;
+
+		clock-names = "aclk_bus1_400";
+		clocks = <&cmu_top CLK_ACLK_BUS1_400>;
+	};
+
+	cmu_bus2: clock-controller@13400000 {
+		compatible = "samsung,exynos5433-cmu-bus2";
+		reg = <0x13400000 0x0b04>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk", "aclk_bus2_400";
+		clocks = <&xxti>, <&cmu_mif CLK_ACLK_BUS2_400>;
+	};
+
+	cmu_g3d: clock-controller@14aa0000 {
+		compatible = "samsung,exynos5433-cmu-g3d";
+		reg = <0x14aa0000 0x1000>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk", "aclk_g3d_400";
+		clocks = <&xxti>, <&cmu_top CLK_ACLK_G3D_400>;
+	};
+
+	cmu_gscl: clock-controller@13cf0000 {
+		compatible = "samsung,exynos5433-cmu-gscl";
+		reg = <0x13cf0000 0x0b10>;
+		#clock-cells = <1>;
+
+		clock-names = "oscclk",
+			"aclk_gscl_111",
+			"aclk_gscl_333";
+		clocks = <&xxti>,
+			<&cmu_top CLK_ACLK_GSCL_111>,
+			<&cmu_top CLK_ACLK_GSCL_333>;
+	};
+
+Example 3: UART controller node that consumes the clock generated by the clock
+	   controller.
+
+	serial_0: serial@14C10000 {
+		compatible = "samsung,exynos5433-uart";
+		reg = <0x14C10000 0x100>;
+		interrupts = <0 421 0>;
+		clocks = <&cmu_peric CLK_PCLK_UART0>,
+			 <&cmu_peric CLK_SCLK_UART0>;
+		clock-names = "uart", "clk_uart_baud0";
+		pinctrl-names = "default";
+		pinctrl-0 = <&uart0_bus>;
+		status = "disabled";
+	};