Re: [PATCH V4 5/5] Documentation: power: reset: Add documentationfor generic SYSCON reboot driver

From: Mark Rutland
Date: Fri Jan 24 2014 - 06:40:25 EST


On Thu, Jan 23, 2014 at 07:20:01PM +0000, Feng Kan wrote:
> Add documentation for generic SYSCON reboot driver.
>
> Signed-off-by: Feng Kan <fkan@xxxxxxx>
> ---
> .../bindings/power/reset/syscon-reboot.txt | 16 ++++++++++++++++
> 1 files changed, 16 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
>
> diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt b/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
> new file mode 100644
> index 0000000..e9eb1fe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
> @@ -0,0 +1,16 @@
> +Generic SYSCON mapped register reset driver

Bindings should describe hardware, not drivers.

What precisely does this binding describe?

> +
> +Required properties:
> +- compatible: should contain "syscon-reboot"
> +- regmap: this is phandle to the register map node
> +- offset: offset in the register map for the reboot register
> +- mask: the reset value written to the reboot register
> +
> +Examples:
> +
> +reboot {
> + compatible = "syscon-reboot";
> + regmap = <&regmapnode>;
> + offset = <0x0>;
> + mask = <0x1>;
> +};

Access size? Endianness?

Why can we not have a binding for the register bank this exists in, and
have that pass on the appropriate details to a syscon-reboot driver?

That way we can change the way we poke things without requiring changes
to bindings or dts.

Thanks,
Mark.
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