[PATCH 08/12] dt-bindings: mmc: Add Xenon description

[robh@kernel.org (Rob Herring)]

On Thu, Jun 09, 2016 at 09:10:14AM +0200, Gregory CLEMENT wrote:
> This patch documents the Xenon SDHCI controller that we can find in the
> Armada 37xx and the Armada 7K and 8K SoCs.
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> ---
>  .../devicetree/bindings/mmc/sdhci-xenon.txt        | 27 ++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-xenon.txt
> 
> diff --git a/Documentation/devicetree/bindings/mmc/sdhci-xenon.txt b/Documentation/devicetree/bindings/mmc/sdhci-xenon.txt
> new file mode 100644
> index 000000000000..e8d49fda5f12
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/sdhci-xenon.txt
> @@ -0,0 +1,27 @@
> +* Marvell sdhci-xenon controller
> +
> +This file documents differences between the core properties in mmc.txt
> +and the properties used by the sdhci-xenon drivers.

Bindings don't document drivers...

> +
> +Required properties:
> +- compatible: Should be "marvell,xenon-sdhci".

SoC specific compatible strings please. This one can be fallback.

> +- reg:
> +  one register area for the SDHCI registers.
> +- interrupts-extended: interrupt number and attributes

Just use interrupts unless you really have a need for 
interrupts-extended. Really, either is valid for any binding, but I 
prefer to just have bindings documented one way.

> +- clocks: array of clocks required for SDHCI.

Missing from the exmaple, and how many clocks and in what order?

> +- bus-width: max bus width in unit of bit, normally should be 1 bit, 4 bits or 8 bits

Isn't this one standard? Just refer back to the common binding.

> +
> +Optional properties:
> +- non-removable: whether card is non-removable.
> +- auto-cmd12: whether cmd12 is sent automatically.

Seems strange this would be optional for a specific controller. I'd 
expect either the xenon controller needs this or not.

> +Example:
> +
> +sdhci0: sdhci at D8000 {
> +	compatible = "marvell,xenon-sdhci";
> +	reg = <0xD8000 0x300>;
> +	interrupts-extended = <&gic GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> +	non-removable;
> +	bus-width = <8>;
> +	auto-cmd12;
> +	status = "disabled";
> +};
> -- 
> 2.5.0
>