On Fri, 27 Apr 2018, matthias....@kernel.org wrote:
> From: Matthias Brugger <mbrug...@suse.com>
>
> Add binding description for the mmsys mfd for some Mediatek
> devices. mmsys has some registers to control clock gates (which is
> used in the clk driver) and some registers to set the routing and enable
> the differnet blocks of the display subsystem.
>
> Signed-off-by: Matthias Brugger <mbrug...@suse.com>
> ---
> .../bindings/arm/mediatek/mediatek,mmsys.txt | 2 --
> .../bindings/display/mediatek/mediatek,disp.txt | 2 +-
> .../devicetree/bindings/mfd/mediatek,mmsys.txt | 27
> ++++++++++++++++++++++
> 3 files changed, 28 insertions(+), 3 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
>
> diff --git
> a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
> b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
> index 4eb8bbe15c01..4468345f8b1a 100644
> --- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt
> @@ -6,10 +6,8 @@ The Mediatek mmsys controller provides various clocks to the
> system.
> Required Properties:
>
> - compatible: Should be one of:
> - - "mediatek,mt2701-mmsys", "syscon"
> - "mediatek,mt2712-mmsys", "syscon"
> - "mediatek,mt6797-mmsys", "syscon"
> - - "mediatek,mt8173-mmsys", "syscon"
> - #clock-cells: Must be 1
>
> The mmsys controller uses the common clk binding from
> diff --git
> a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> index 383183a89164..85a3b4ec06cd 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> @@ -9,7 +9,7 @@ function block.
>
> All DISP device tree nodes must be siblings to the central MMSYS_CONFIG node.
> For a description of the MMSYS_CONFIG binding, see
> -Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.txt.
> +Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
>
> DISP function blocks
> ====================
> diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
> b/Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
> new file mode 100644
> index 000000000000..2331ae16917e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/mediatek,mmsys.txt
> @@ -0,0 +1,27 @@
> +MediaTek MMSYS Multifunction Device Driver
What is "MMSYS"?
"Multi-Function Driver"s are specific to Linux.
What actually is the device?
> +MMSYS is a multifunction device with the following sub modules:
> +- clocks for the multi-media subsystem
> +- central node for the DRM subsystem.
> +
> +This document describes the binding for MFD device. The MFD takes care to
> initailize
> +the clock driver and the DRM driver. More info see
> +Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> +
> +Required properties:
> +- compatible: Should be one of:
> + - "mediatek,mt2701-mmsys", "syscon"
> + - "mediatek,mt8173-mmsys", "syscon"
> +- #clock-cells: Must be 1
> +
> +Optional properties:
> +- power-domains: list of powerdomains needed for the subsystem to work
> +
> +Example:
> +
> +mmsys: clock-controller@14000000 {
> + compatible = "mediatek,mt8173-mmsys", "syscon";
> + reg = <0 0x14000000 0 0x1000>;
> + power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
> + #clock-cells = <1>;
> +};
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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