Add device tree bindings for Audio Clock Generator (ADG) of R-Car Socs.

Signed-off-by: Jiada Wang jiada_wang@mentor.com --- .../clock/renesas,rcar-adg-clocks.txt | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/renesas,rcar-adg-clocks.txt

diff --git a/Documentation/devicetree/bindings/clock/renesas,rcar-adg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,rcar-adg-clocks.txt new file mode 100644 index 000000000000..76fc4f8964e9 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/renesas,rcar-adg-clocks.txt @@ -0,0 +1,24 @@ +* Renesas R-Car Audio Clock Generator (ADG) + +The Audio Clock Generator (ADG) is part of R-Car Audio module, it +selects and supplies the necessary clock for the SSIU, EAVB-IF, SCU, +ADSP or DTCP module. It also divides the frequency of the selected +clock and sends it outside the chip. + +Required Properties: + + - compatible: Must be one of + - "renesas,rcar_sound-gen1" for the R-Car GEN1 SoCs + - "renesas,rcar_sound-gen2" for the R-Car GEN2 SoCs + - "renesas,rcar_sound-gen3" for the R-Car GEN3 SoCs + + - reg: Base address and length of the memory resource used by the ADG + + - clocks: References to the parent clock S0D1. + - clock-names: ADG refer to its parent clock by name "adg". + - #clock-cells: Can be 0, 1 or 2 + - When clock-cells = 0, ADG registers one fixed clock out + - When clock-cells = 1, ADG registers 3 fixed clock out + - When clock-cells = 2, ADG registers 3 fixed clock out and 8 AVB clocks + second clock specifier need to be 0 to refer to fixed clock out, need + to be 1 to refer to AVB clocks