[PATCH 2/2] dt-binding: mediatek-dwmac: add binding document for MediaTek MT2712 DWMAC

[robh@kernel.org (Rob Herring)]

On Mon, Oct 29, 2018 at 11:04:54AM +0800, Biao Huang wrote:
> The commit adds the device tree binding documentation for the MediaTek DWMAC
> found on MediaTek MT2712.
> 
> Signed-off-by: Biao Huang <biao.huang@mediatek.com>
> ---
>  .../devicetree/bindings/net/mediatek-dwmac.txt     |   49 ++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/mediatek-dwmac.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/mediatek-dwmac.txt b/Documentation/devicetree/bindings/net/mediatek-dwmac.txt
> new file mode 100644
> index 0000000..8baf0e4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/mediatek-dwmac.txt
> @@ -0,0 +1,49 @@
> +MediaTek DWMAC glue layer controller
> +
> +This file documents platform glue layer for stmmac.
> +Please see stmmac.txt for the other unchanged properties.
> +
> +The device node has following properties.
> +
> +Required properties:
> +- compatible:  Should be "mediatek,mt2712-gmac" for MT2712 SoC
> +- reg:  Address and length of the register set for the device
> +- interrupts:  Should contain the MAC interrupts
> +- interrupt-names: Should contain a list of interrupt names corresponding to
> +	the interrupts in the interrupts property, if available.
> +	Should be "macirq" for the main MAC IRQ
> +- clocks: Must contain a phandle for each entry in clock-names.
> +- clock-names: the name of the clock listed in the clocks property. These are
> +	"axi", "apb", "mac_ext", "mac_parent", "ptp_ref", "ptp_parent", "ptp_top"
> +	for MT2712 SoC

Clocks should represent the physical clocks connected to a block. Parent 
clocks are not in that category.

> +- mac-address: See ethernet.txt in the same directory
> +- phy-mode: See ethernet.txt in the same directory
> +
> +Example:
> +
> +	eth: ethernet at 1101c000 {
> +		compatible = "mediatek,mt2712-gmac";
> +		reg = <0 0x1101c000 0 0x1300>;
> +		interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_LOW>;
> +		interrupt-names = "macirq";
> +		phy-mode ="rgmii-id";
> +		mac-address = [00 55 7b b5 7d f7];
> +		clock-names = "axi",
> +			      "apb",
> +			      "mac_ext",
> +			      "mac_parent",
> +			      "ptp_ref",
> +			      "ptp_parent",
> +			      "ptp_top";
> +		clocks = <&pericfg CLK_PERI_GMAC>,
> +			 <&pericfg CLK_PERI_GMAC_PCLK>,
> +			 <&topckgen CLK_TOP_ETHER_125M_SEL>,
> +			 <&topckgen CLK_TOP_ETHERPLL_125M>,
> +			 <&topckgen CLK_TOP_ETHER_50M_SEL>,
> +			 <&topckgen CLK_TOP_APLL1_D3>,
> +			 <&topckgen CLK_TOP_APLL1>;
> +		snps,txpbl = <32>;
> +		snps,rxpbl = <32>;
> +		snps,reset-gpio = <&pio 87 GPIO_ACTIVE_LOW>;
> +		snps,reset-active-low;
> +	};
> -- 
> 1.7.9.5
>