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Date: Thu, 27 Nov 2014 16:34:59 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: kgene.kim@...sung.com, mark.rutland@....com, arnd@...db.de,
olof@...om.net, catalin.marinas@....com, will.deacon@....com,
s.nawrocki@...sung.com, tomasz.figa@...il.com,
thomas.abraham@...aro.org, linus.walleij@...aro.org,
kyungmin.park@...sung.com, inki.dae@...sung.com,
chanho61.park@...sung.com, geunsik.lim@...sung.com,
sw0312.kim@...sung.com, jh80.chung@...sung.com,
cw00.choi@...sung.com, a.kesavan@...sung.com,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 02/19] clk: samsung: Add binding documentation for Exynos5433
clock controller
This patch add binding documentation for Exynos5433 clock controller.
Exynos5433 has various clock domains So, this documentation explains
the detailed clock domains ans usage guide.
Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc: Tomasz Figa <tomasz.figa@...il.com>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Acked-by: Inki Dae <inki.dae@...sung.com>
Acked-by: Geunsik Lim <geunsik.lim@...sung.com>
---
.../devicetree/bindings/clock/exynos5433-clock.txt | 106 +++++++++++++++++++++
1 file changed, 106 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/exynos5433-clock.txt
diff --git a/Documentation/devicetree/bindings/clock/exynos5433-clock.txt b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt
new file mode 100644
index 0000000..72cd0ba
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/exynos5433-clock.txt
@@ -0,0 +1,106 @@
+* 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.
+
+- reg: physical base address of the controller and length of memory mapped
+ region.
+
+- #clock-cells: should be 1.
+
+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 clock controller nodes are listed below.
+
+ cmu_top: clock-controller@...0030000 {
+ compatible = "samsung,exynos5433-cmu-top";
+ reg = <0x10030000 0x0c04>;
+ #clock-cells = <1>;
+ };
+
+ cmu_cpif: clock-controller@...0fc0000 {
+ compatible = "samsung,exynos5433-cmu-cpif";
+ reg = <0x10fc0000 0x0c04>;
+ #clock-cells = <1>;
+ };
+
+ cmu_mif: clock-controller@...05b0000 {
+ compatible = "samsung,exynos5433-cmu-mif";
+ reg = <0x105b0000 0x100c>;
+ #clock-cells = <1>;
+ };
+
+ cmu_peric: clock-controller@...4c80000 {
+ compatible = "samsung,exynos5433-cmu-peric";
+ reg = <0x14c80000 0x0b08>;
+ #clock-cells = <1>;
+ };
+
+ cmu_peris: clock-controller@...0040000 {
+ compatible = "samsung,exynos5433-cmu-peris";
+ reg = <0x10040000 0x0b20>;
+ #clock-cells = <1>;
+ };
+
+ cmu_fsys: clock-controller@...56e0000 {
+ compatible = "samsung,exynos5433-cmu-fsys";
+ reg = <0x156e0000 0x0b04>;
+ #clock-cells = <1>;
+ };
+
+Example 2: UART controller node that consumes the clock generated by the clock
+ controller.
+
+ serial_0: serial@...10000 {
+ 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";
+ };
+
+Example 3: SPI controller node that consumes the clock generated by the clock
+ controller.
+
+ spi_0: spi@...20000 {
+ compatible = "samsung,exynos7-spi";
+ reg = <0x14d20000 0x100>;
+ interrupts = <0 432 0>;
+ dmas = <&pdma0 9>, <&pdma0 8>;
+ dma-names = "tx", "rx";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clocks = <&cmu_peric CLK_PCLK_SPI0>,
+ <&cmu_top CLK_SCLK_SPI0_PERIC>;
+ clock-names = "spi", "spi_busclk0";
+ samsung,spi-src-clk = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi0_bus>;
+ status = "disabled";
+ };
--
1.8.5.5
--
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