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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>
This commit is contained in:
Chanwoo Choi
Sylwester Nawrocki
parent
e64fb42da4
commit
1a21dfed63
305
Documentation/devicetree/bindings/clock/exynos5433-clock.txt
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305
Documentation/devicetree/bindings/clock/exynos5433-clock.txt
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* Samsung Exynos5433 CMU (Clock Management Units)
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The Exynos5433 clock controller generates and supplies clock to various
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controllers within the Exynos5433 SoC.
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Required Properties:
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- compatible: should be one of the following.
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- "samsung,exynos5433-cmu-top" - clock controller compatible for CMU_TOP
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which generates clocks for IMEM/FSYS/G3D/GSCL/HEVC/MSCL/G2D/MFC/PERIC/PERIS
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domains and bus clocks.
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- "samsung,exynos5433-cmu-cpif" - clock controller compatible for CMU_CPIF
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which generates clocks for LLI (Low Latency Interface) IP.
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- "samsung,exynos5433-cmu-mif" - clock controller compatible for CMU_MIF
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which generates clocks for DRAM Memory Controller domain.
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- "samsung,exynos5433-cmu-peric" - clock controller compatible for CMU_PERIC
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which generates clocks for UART/I2C/SPI/I2S/PCM/SPDIF/PWM/SLIMBUS IPs.
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- "samsung,exynos5433-cmu-peris" - clock controller compatible for CMU_PERIS
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which generates clocks for PMU/TMU/MCT/WDT/RTC/SECKEY/TZPC IPs.
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- "samsung,exynos5433-cmu-fsys" - clock controller compatible for CMU_FSYS
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which generates clocks for USB/UFS/SDMMC/TSI/PDMA IPs.
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- "samsung,exynos5433-cmu-g2d" - clock controller compatible for CMU_G2D
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which generates clocks for G2D/MDMA IPs.
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- "samsung,exynos5433-cmu-disp" - clock controller compatible for CMU_DISP
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which generates clocks for Display (DECON/HDMI/DSIM/MIXER) IPs.
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- "samsung,exynos5433-cmu-aud" - clock controller compatible for CMU_AUD
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which generates clocks for Cortex-A5/BUS/AUDIO clocks.
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- "samsung,exynos5433-cmu-bus0", "samsung,exynos5433-cmu-bus1"
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and "samsung,exynos5433-cmu-bus2" - clock controller compatible for CMU_BUS
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which generates global data buses clock and global peripheral buses clock.
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- "samsung,exynos5433-cmu-g3d" - clock controller compatible for CMU_G3D
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which generates clocks for 3D Graphics Engine IP.
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- "samsung,exynos5433-cmu-gscl" - clock controller compatible for CMU_GSCL
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which generates clocks for GSCALER IPs.
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- reg: physical base address of the controller and length of memory mapped
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region.
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- #clock-cells: should be 1.
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- clocks: list of the clock controller input clock identifiers,
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from common clock bindings. Please refer the next section
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to find the input clocks for a given controller.
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- clock-names: list of the clock controller input clock names,
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as described in clock-bindings.txt.
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Input clocks for top clock controller:
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- oscclk
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- sclk_mphy_pll
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- sclk_mfc_pll
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- sclk_bus_pll
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Input clocks for cpif clock controller:
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- oscclk
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Input clocks for mif clock controller:
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- oscclk
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- sclk_mphy_pll
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Input clocks for fsys clock controller:
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- oscclk
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- sclk_ufs_mphy
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- div_aclk_fsys_200
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- sclk_pcie_100_fsys
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- sclk_ufsunipro_fsys
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- sclk_mmc2_fsys
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- sclk_mmc1_fsys
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- sclk_mmc0_fsys
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- sclk_usbhost30_fsys
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- sclk_usbdrd30_fsys
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Input clocks for g2d clock controller:
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- oscclk
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- aclk_g2d_266
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- aclk_g2d_400
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Input clocks for disp clock controller:
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- oscclk
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- sclk_dsim1_disp
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- sclk_dsim0_disp
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- sclk_dsd_disp
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- sclk_decon_tv_eclk_disp
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- sclk_decon_vclk_disp
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- sclk_decon_eclk_disp
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- sclk_decon_tv_vclk_disp
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- aclk_disp_333
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Input clocks for bus0 clock controller:
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- aclk_bus0_400
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Input clocks for bus1 clock controller:
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- aclk_bus1_400
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Input clocks for bus2 clock controller:
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- oscclk
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- aclk_bus2_400
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Input clocks for g3d clock controller:
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- oscclk
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- aclk_g3d_400
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Input clocks for gscl clock controller:
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- oscclk
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- aclk_gscl_111
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- aclk_gscl_333
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Each clock is assigned an identifier and client nodes can use this identifier
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to specify the clock which they consume.
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All available clocks are defined as preprocessor macros in
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dt-bindings/clock/exynos5433.h header and can be used in device
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tree sources.
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Example 1: Examples of 'oscclk' source clock node are listed below.
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xxti: xxti {
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compatible = "fixed-clock";
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clock-output-names = "oscclk";
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#clock-cells = <0>;
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};
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Example 2: Examples of clock controller nodes are listed below.
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cmu_top: clock-controller@10030000 {
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compatible = "samsung,exynos5433-cmu-top";
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reg = <0x10030000 0x0c04>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"sclk_mphy_pll",
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"sclk_mfc_pll",
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"sclk_bus_pll";
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clocks = <&xxti>,
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<&cmu_cpif CLK_SCLK_MPHY_PLL>,
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<&cmu_mif CLK_SCLK_MFC_PLL>,
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<&cmu_mif CLK_SCLK_BUS_PLL>;
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};
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cmu_cpif: clock-controller@10fc0000 {
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compatible = "samsung,exynos5433-cmu-cpif";
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reg = <0x10fc0000 0x0c04>;
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#clock-cells = <1>;
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clock-names = "oscclk";
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clocks = <&xxti>;
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};
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cmu_mif: clock-controller@105b0000 {
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compatible = "samsung,exynos5433-cmu-mif";
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reg = <0x105b0000 0x100c>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"sclk_mphy_pll";
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clocks = <&xxti>,
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<&cmu_cpif CLK_SCLK_MPHY_PLL>;
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};
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cmu_peric: clock-controller@14c80000 {
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compatible = "samsung,exynos5433-cmu-peric";
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reg = <0x14c80000 0x0b08>;
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#clock-cells = <1>;
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};
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cmu_peris: clock-controller@10040000 {
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compatible = "samsung,exynos5433-cmu-peris";
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reg = <0x10040000 0x0b20>;
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#clock-cells = <1>;
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};
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cmu_fsys: clock-controller@156e0000 {
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compatible = "samsung,exynos5433-cmu-fsys";
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reg = <0x156e0000 0x0b04>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"sclk_ufs_mphy",
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"div_aclk_fsys_200",
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"sclk_pcie_100_fsys",
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"sclk_ufsunipro_fsys",
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"sclk_mmc2_fsys",
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"sclk_mmc1_fsys",
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"sclk_mmc0_fsys",
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"sclk_usbhost30_fsys",
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"sclk_usbdrd30_fsys";
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clocks = <&xxti>,
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<&cmu_cpif CLK_SCLK_UFS_MPHY>,
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<&cmu_top CLK_DIV_ACLK_FSYS_200>,
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<&cmu_top CLK_SCLK_PCIE_100_FSYS>,
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<&cmu_top CLK_SCLK_UFSUNIPRO_FSYS>,
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<&cmu_top CLK_SCLK_MMC2_FSYS>,
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<&cmu_top CLK_SCLK_MMC1_FSYS>,
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<&cmu_top CLK_SCLK_MMC0_FSYS>,
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<&cmu_top CLK_SCLK_USBHOST30_FSYS>,
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<&cmu_top CLK_SCLK_USBDRD30_FSYS>;
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};
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cmu_g2d: clock-controller@12460000 {
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compatible = "samsung,exynos5433-cmu-g2d";
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reg = <0x12460000 0x0b08>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"aclk_g2d_266",
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"aclk_g2d_400";
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clocks = <&xxti>,
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<&cmu_top CLK_ACLK_G2D_266>,
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<&cmu_top CLK_ACLK_G2D_400>;
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};
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cmu_disp: clock-controller@13b90000 {
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compatible = "samsung,exynos5433-cmu-disp";
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reg = <0x13b90000 0x0c04>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"sclk_dsim1_disp",
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"sclk_dsim0_disp",
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"sclk_dsd_disp",
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"sclk_decon_tv_eclk_disp",
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"sclk_decon_vclk_disp",
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"sclk_decon_eclk_disp",
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"sclk_decon_tv_vclk_disp",
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"aclk_disp_333";
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clocks = <&xxti>,
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<&cmu_mif CLK_SCLK_DSIM1_DISP>,
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<&cmu_mif CLK_SCLK_DSIM0_DISP>,
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<&cmu_mif CLK_SCLK_DSD_DISP>,
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<&cmu_mif CLK_SCLK_DECON_TV_ECLK_DISP>,
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<&cmu_mif CLK_SCLK_DECON_VCLK_DISP>,
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<&cmu_mif CLK_SCLK_DECON_ECLK_DISP>,
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<&cmu_mif CLK_SCLK_DECON_TV_VCLK_DISP>,
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<&cmu_mif CLK_ACLK_DISP_333>;
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};
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cmu_aud: clock-controller@114c0000 {
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compatible = "samsung,exynos5433-cmu-aud";
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reg = <0x114c0000 0x0b04>;
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#clock-cells = <1>;
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};
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cmu_bus0: clock-controller@13600000 {
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compatible = "samsung,exynos5433-cmu-bus0";
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reg = <0x13600000 0x0b04>;
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#clock-cells = <1>;
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clock-names = "aclk_bus0_400";
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clocks = <&cmu_top CLK_ACLK_BUS0_400>;
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};
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cmu_bus1: clock-controller@14800000 {
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compatible = "samsung,exynos5433-cmu-bus1";
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reg = <0x14800000 0x0b04>;
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#clock-cells = <1>;
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clock-names = "aclk_bus1_400";
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clocks = <&cmu_top CLK_ACLK_BUS1_400>;
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};
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cmu_bus2: clock-controller@13400000 {
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compatible = "samsung,exynos5433-cmu-bus2";
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reg = <0x13400000 0x0b04>;
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#clock-cells = <1>;
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clock-names = "oscclk", "aclk_bus2_400";
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clocks = <&xxti>, <&cmu_mif CLK_ACLK_BUS2_400>;
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};
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cmu_g3d: clock-controller@14aa0000 {
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compatible = "samsung,exynos5433-cmu-g3d";
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reg = <0x14aa0000 0x1000>;
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#clock-cells = <1>;
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clock-names = "oscclk", "aclk_g3d_400";
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clocks = <&xxti>, <&cmu_top CLK_ACLK_G3D_400>;
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};
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cmu_gscl: clock-controller@13cf0000 {
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compatible = "samsung,exynos5433-cmu-gscl";
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reg = <0x13cf0000 0x0b10>;
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#clock-cells = <1>;
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clock-names = "oscclk",
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"aclk_gscl_111",
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"aclk_gscl_333";
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clocks = <&xxti>,
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<&cmu_top CLK_ACLK_GSCL_111>,
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<&cmu_top CLK_ACLK_GSCL_333>;
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};
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Example 3: UART controller node that consumes the clock generated by the clock
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controller.
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serial_0: serial@14C10000 {
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compatible = "samsung,exynos5433-uart";
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reg = <0x14C10000 0x100>;
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interrupts = <0 421 0>;
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clocks = <&cmu_peric CLK_PCLK_UART0>,
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<&cmu_peric CLK_SCLK_UART0>;
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clock-names = "uart", "clk_uart_baud0";
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pinctrl-names = "default";
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pinctrl-0 = <&uart0_bus>;
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status = "disabled";
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};
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