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Commit 5f273c0d authored by Codrin Ciubotariu's avatar Codrin Ciubotariu Committed by Stephen Boyd
Browse files

dt-bindings: clk: at91: add an I2S mux clock 



The I2S mux clock can be used to select the I2S input clock. The
available parents are the peripheral and the generated clocks.

Signed-off-by: default avatarCodrin Ciubotariu <codrin.ciubotariu@microchip.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent ce397d21

Documentation/devicetree/bindings/clock/at91-clock.txt

+35 −0
Original line number Diff line number Diff line
@@ -91,6 +91,9 @@ Required properties: 
		at91 audio pll output on AUDIOPLLCLK that feeds the PMC

		and can be used by peripheral clock or generic clock



	"atmel,sama5d2-clk-i2s-mux" (under pmc node):

		at91 I2S clock source selection



Required properties for SCKC node:

- reg : defines the IO memory reserved for the SCKC.

- #size-cells : shall be 0 (reg is used to encode clk id).
@@ -507,3 +510,35 @@ For example: 
			atmel,clk-output-range = <0 83000000>;

		};

	};



Required properties for I2S mux clocks:

- #size-cells : shall be 0 (reg is used to encode I2S bus id).

- #address-cells : shall be 1 (reg is used to encode I2S bus id).

- name: device tree node describing a specific mux clock.

	* #clock-cells : from common clock binding; shall be set to 0.

	* clocks : shall be the mux clock parent phandles; shall be 2 phandles:

	  peripheral and generated clock; the first phandle shall belong to the

	  peripheral clock and the second one shall belong to the generated

	  clock; "clock-indices" property can be user to specify

	  the correct order.

	* reg: I2S bus id of the corresponding mux clock.

	  e.g. reg = <0>; for i2s0, reg = <1>; for i2s1



For example:

	i2s_clkmux {

		compatible = "atmel,sama5d2-clk-i2s-mux";

		#address-cells = <1>;

		#size-cells = <0>;



		i2s0muxck: i2s0_muxclk {

			clocks = <&i2s0_clk>, <&i2s0_gclk>;

			#clock-cells = <0>;

			reg = <0>;

		};



		i2s1muxck: i2s1_muxclk {

			clocks = <&i2s1_clk>, <&i2s1_gclk>;

			#clock-cells = <0>;

			reg = <1>;

		};

	};