[PATCH 1/2] dt-bindings: clock: adpll: Add binding documentation for TI adpll

[Michael Turquette]

Hi Tony,

Quoting Tony Lindgren (2016-02-12 13:20:08)
> Let's add binding documentation for the ADPLL found on dm814x
> and dra62x. The binding uses the standard clock binding.
> 
> Cc: devicetree at vger.kernel.org
> Cc: Rob Herring <robh+dt at kernel.org>
> Cc: Stephen Boyd <sboyd at codeaurora.org>
> Cc: Tero Kristo <t-kristo at ti.com>
> Acked-by: Michael Turquette <mturquette at baylibre.com>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> ---
>  .../devicetree/bindings/clock/ti/adpll.txt         | 43 ++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/ti/adpll.txt
> 
> diff --git a/Documentation/devicetree/bindings/clock/ti/adpll.txt b/Documentation/devicetree/bindings/clock/ti/adpll.txt
> new file mode 100644
> index 0000000..8516bf0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/ti/adpll.txt
> @@ -0,0 +1,43 @@
> +Binding for Texas Instruments ADPLL clock.
> +
> +Binding status: Unstable - ABI compatibility may be broken in the future
> +
> +This binding uses the common clock binding[1]. It assumes a
> +register-mapped ADPLL with two to three selectable input clocks
> +and three to four children.
> +
> +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
> +
> +Required properties:
> +- compatible : shall be one of "ti,dm814-adpll-s-clock" or
> +  "ti,dm814-adpll-lj-clock" depending on the type of the ADPLL
> +- #clock-cells : from common clock binding; shall be set to 0.

Thanks for the patch.

clock-cells = 1 in both of the examples below (which looks right).

> +- clocks : link phandles of parent clocks clkinp and clkinpulow, note
> +  that the adpll-s-clock also has an optional clkinphif
> +- reg : address and length of the register set for controlling the ADPLL.
> +
> +Examples:
> +       adpll_mpu_ck: adpll at 40 {
> +               #clock-cells = <1>;
> +               compatible = "ti,dm814-adpll-s-clock";
> +               reg = <0x40 0x40>;
> +               clocks = <&devosc_ck &devosc_ck &devosc_ck>;
> +               clock-names = "clkinp", "clkinpulow", "clkinphif";
> +               clock-indices = <0>, <1>, <2>, <3>;

Why is clock-indices necessary?

Best regards,
Mike

> +               clock-output-names = "481c5040.adpll.dcoclkldo",
> +                                    "481c5040.adpll.clkout",
> +                                    "481c5040.adpll.clkoutx2",
> +                                    "481c5040.adpll.clkouthif";
> +       };
> +
> +       adpll_dsp_ck: adpll at 80 {
> +               #clock-cells = <1>;
> +               compatible = "ti,dm814-adpll-lj-clock";
> +               reg = <0x80 0x30>;
> +               clocks = <&devosc_ck &devosc_ck>;
> +               clock-names = "clkinp", "clkinpulow";
> +               clock-indices = <0>, <1>, <2>;
> +               clock-output-names = "481c5080.adpll.dcoclkldo",
> +                                    "481c5080.adpll.clkout",
> +                                    "481c5080.adpll.clkoutldo";
> +       };
> -- 
> 2.7.0
>