On Fri, Nov 2, 2018 at 2:23 PM Faiz Abbas <faiz_abbas@xxxxxx> wrote:
>
> Add documentation for the generic simple phy implementation.
We don't do 'simple' or 'generic' bindings.
> Signed-off-by: Faiz Abbas <faiz_abbas@xxxxxx>
> ---
> .../devicetree/bindings/phy/phy-of-simple.txt | 29 +++++++++++++++++++
> 1 file changed, 29 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/phy-of-simple.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/phy-of-simple.txt b/Documentation/devicetree/bindings/phy/phy-of-simple.txt
> new file mode 100644
> index 000000000000..696f2763395c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/phy-of-simple.txt
> @@ -0,0 +1,29 @@
> +Generic simple phy device tree binding
> +--------------------------------------
> +
> +A good number of phy implementations merely read dts properties,
> +enable clocks, regulators or do resets without having a dedicated register
> +map. This binding implements a generic phy driver which can be used for
> +such simple implementations and avoid boilerplate code duplication.
Sure, but then latter some needs certain timing/ordering of those
controls or some other DT additions. 'generic' or 'simple' never work
out for bindings. By all means though, write a simple/generic phy
driver. Just make it understand an explicit list of compatible
strings. Then when a phy turns out to be not so simple, we can write a
driver for it with changing the DT.
> +Required Properties:
> +- compatible : must be "simple-phy"
> +- phy-cells : must be 0
#phy-cells
> +
> +Optional Properties:
> +- bus-width : generic bus-width. Must be positive.
> +- max-bitrate : generic max-bitrate. Must be positive.
> +- pwr : phandle to phy pwr regulator node.
That's not the regulator binding.
> +
> +Example:
> +
> +The following example is a can transceiver implemented as a generic phy.
> +It has a max-bitrate property and a pwr regulator.
> +
> +
> +transceiver1: can-transceiver {
> + compatible = "simple-phy";
> + max-bitrate = <5000000>;
> + pwr-supply = <&transceiver1_fixed>;
> + #phy-cells = <0>;
> +};
> --
> 2.18.0
>
