On Mon, Jul 22, 2013 at 07:49:26AM +0100, Chanho Park wrote:
> This patch adds a dt-binding document for exynos rotator. It describes which
> nodes should be defined to use the rotator.
>
> Signed-off-by: Chanho Park <chanho61.park@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> .../bindings/drm/exynos/samsung-rotator.txt | 35 ++++++++++++++++++++
> 1 file changed, 35 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/drm/exynos/samsung-rotator.txt
>
> diff --git a/Documentation/devicetree/bindings/drm/exynos/samsung-rotator.txt b/Documentation/devicetree/bindings/drm/exynos/samsung-rotator.txt
> new file mode 100644
> index 0000000..6b1d704
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/drm/exynos/samsung-rotator.txt
> @@ -0,0 +1,35 @@
> +* Samsung Image Rotator
> +
> +Required properties:
> + - compatible : value should be the "samsung,exynos4210".
> + - reg : Physical base address of the IP registers and length of memory
> + mapped region.
> + - interrupts : interrupt number to the CPU.
> + - clocks : clock number of exynos4 rotator clock.
> + - clocks : clock name of rotator
clock-names?
> + - status : "okay" or "disabled"
> + - limit table for image formats : min_w/min_h/max_w/max_h for min/max of image
Limit table? This doesn't seem to be a well-defined binding, and it
seems like a relatively generic thing to describe.
> +
> +Example:
> + rotator: rotator@12810000 {
> + compatible = "samsung,exynos4210-rotator";
> + reg = <0x12810000 0x1000>;
> + interrupts = <0 83 0>;
> + clocks = <&clock 278>;
> + clock-names = "rotator";
> + status = "disabled";
> + ycbcr420_2p {
Which names are allowed for these subnodes?
> + min_w = <32>;
> + min_h = <32>;
> + max_w = <32768>;
> + max_h = <32768>;
> + align = <3>;
min-width, min-height, max-width, max-height? What units are they in?
What does alignment specify exactly?
Are these a configurable part of the rotator hardware, or are these
values always the same? If thery're always the same, there's no need to
describe in in the devicetree.
Thanks,
Mark.
> + };
> + rgb888 {
> + min_w = <8>;
> + min_h = <8>;
> + max_w = <8192>;
> + max_h = <8192>;
> + align = <2>;
> + };
> + };
> --
> 1.7.9.5
>
>
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