On Fri, May 25, 2018 at 03:34:22PM +0300, Codrin Ciubotariu wrote:
> 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: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/clock/at91-clock.txt | 34 ++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt
> index 51c259a..1c46b3c 100644
> --- a/Documentation/devicetree/bindings/clock/at91-clock.txt
> +++ b/Documentation/devicetree/bindings/clock/at91-clock.txt
> @@ -90,6 +90,8 @@ Required properties:
> "atmel,sama5d2-clk-audio-pll-pmc"
> 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":
> + at91 I2S clock source selection
Is this boolean or takes some values. If latter, what are valid values?
>
> Required properties for SCKC node:
> - reg : defines the IO memory reserved for the SCKC.
> @@ -507,3 +509,35 @@ 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 {
What is this a child of?
> + compatible = "atmel,sama5d2-clk-i2s-mux";
> + #address-cells = <1>;
> + #size-cells = <0>;
How do you address this block? My guess is you don't because it is just
part of some other block and you are just creating this node to
instantiate a driver. Just make the node for the actual h/w block a
clock provider and define the clock ids (0 and 1).
> +
> + 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>;
> + };
> + };
> --
> 2.7.4
>
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
