From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../bindings/clock/renesas,cpg-mstp-clocks.txt | 57 ++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt (limited to 'Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt') diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt new file mode 100644 index 000000000..0a80fa70c --- /dev/null +++ b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt @@ -0,0 +1,57 @@ +* Renesas CPG Module Stop (MSTP) Clocks + +The CPG can gate SoC device clocks. The gates are organized in groups of up to +32 gates. + +This device tree binding describes a single 32 gate clocks group per node. +Clocks are referenced by user nodes by the MSTP node phandle and the clock +index in the group, from 0 to 31. + +Required Properties: + + - compatible: Must be one of the following + - "renesas,r7s72100-mstp-clocks" for R7S72100 (RZ) MSTP gate clocks + - "renesas,r8a73a4-mstp-clocks" for R8A73A4 (R-Mobile APE6) MSTP gate clocks + - "renesas,r8a7740-mstp-clocks" for R8A7740 (R-Mobile A1) MSTP gate clocks + - "renesas,r8a7779-mstp-clocks" for R8A7779 (R-Car H1) MSTP gate clocks + - "renesas,r8a7790-mstp-clocks" for R8A7790 (R-Car H2) MSTP gate clocks + - "renesas,r8a7791-mstp-clocks" for R8A7791 (R-Car M2) MSTP gate clocks + - "renesas,r8a7794-mstp-clocks" for R8A7794 (R-Car E2) MSTP gate clocks + - "renesas,sh73a0-mstp-clocks" for SH73A0 (SH-MobileAG5) MSTP gate clocks + - "renesas,cpg-mstp-clock" for generic MSTP gate clocks + - reg: Base address and length of the I/O mapped registers used by the MSTP + clocks. The first register is the clock control register and is mandatory. + The second register is the clock status register and is optional when not + implemented in hardware. + - clocks: Reference to the parent clocks, one per output clock. The parents + must appear in the same order as the output clocks. + - #clock-cells: Must be 1 + - clock-output-names: The name of the clocks as free-form strings + - clock-indices: Indices of the gate clocks into the group (0 to 31) + +The clocks, clock-output-names and clock-indices properties contain one entry +per gate clock. The MSTP groups are sparsely populated. Unimplemented gate +clocks must not be declared. + + +Example +------- + + #include + + mstp3_clks: mstp3_clks@e615013c { + compatible = "renesas,r8a7790-mstp-clocks", "renesas,cpg-mstp-clocks"; + reg = <0 0xe615013c 0 4>, <0 0xe6150048 0 4>; + clocks = <&cp_clk>, <&mmc1_clk>, <&sd3_clk>, <&sd2_clk>, + <&cpg_clocks R8A7790_CLK_SD1>, <&cpg_clocks R8A7790_CLK_SD0>, + <&mmc0_clk>; + #clock-cells = <1>; + clock-output-names = + "tpu0", "mmcif1", "sdhi3", "sdhi2", + "sdhi1", "sdhi0", "mmcif0"; + clock-indices = < + R8A7790_CLK_TPU0 R8A7790_CLK_MMCIF1 R8A7790_CLK_SDHI3 + R8A7790_CLK_SDHI2 R8A7790_CLK_SDHI1 R8A7790_CLK_SDHI0 + R8A7790_CLK_MMCIF0 + >; + }; -- cgit v1.2.3-54-g00ecf