[PATCH v3 3/3] dts: r40: add second ethernet support

[Rob Herring]

On Sun, Nov 21, 2021 at 10:53:37PM +0300, Evgeny Boger wrote:
> R40 (aka V40, A40i, T3) has two different Ethernet IP
> called EMAC and GMAC.
> EMAC only support 10/100 Mbit in MII mode,
> while GMAC support both 10/100 (MII) and 10/100/1000 (RGMII).
> 
> In contrast to A10/A20 where GMAC and EMAC share the same pins
> making EMAC somewhat pointless, on R40 EMAC can be routed to port H.
> Both EMAC (on port H) and GMAC (on port A)
>  can be then enabled at the same time, allowing for two ethernet ports.
> 
> Signed-off-by: Evgeny Boger <boger at wirenboard.com>
> ---
>  arch/arm/boot/dts/sun8i-r40.dtsi | 50 ++++++++++++++++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi b/arch/arm/boot/dts/sun8i-r40.dtsi
> index 1d87fc0c24ee..19ea33421c63 100644
> --- a/arch/arm/boot/dts/sun8i-r40.dtsi
> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> @@ -217,6 +217,20 @@ syscon: system-control at 1c00000 {
>  			#size-cells = <1>;
>  			ranges;
>  
> +			sram_a: sram at 0 {
> +				compatible = "mmio-sram";
> +				reg = <0x00000000 0xc000>;
> +				#address-cells = <1>;
> +				#size-cells = <1>;
> +				ranges = <0 0x00000000 0xc000>;
> +
> +				emac_sram: sram-section at 8000 {
> +					compatible = "allwinner,sun4i-a10-sram-a3-a4";
> +					reg = <0x8000 0x4000>;
> +					status = "okay";

'okay' is the default, so you don't need it.

> +				};
> +			};
> +
>  			sram_c: sram at 1d00000 {
>  				compatible = "mmio-sram";
>  				reg = <0x01d00000 0xd0000>;
> @@ -543,6 +557,24 @@ gmac_rgmii_pins: gmac-rgmii-pins {
>  				drive-strength = <40>;
>  			};
>  
> +			emac_pa_pins: emac-pa-pins {
> +				pins = "PA0", "PA1", "PA2",
> +				       "PA3", "PA4", "PA5", "PA6",
> +				       "PA7", "PA8", "PA9", "PA10",
> +				       "PA11", "PA12", "PA13", "PA14",
> +				       "PA15", "PA16";
> +				function = "emac";
> +			};
> +
> +			emac_ph_pins: emac-ph-pins {
> +				pins = "PH8", "PH9", "PH10", "PH11",
> +				       "PH14", "PH15", "PH16", "PH17",
> +				       "PH18","PH19", "PH20", "PH21",
> +				       "PH22", "PH23", "PH24", "PH25",
> +				       "PH26", "PH27";
> +				function = "emac";
> +			};
> +
>  			i2c0_pins: i2c0-pins {
>  				pins = "PB0", "PB1";
>  				function = "i2c0";
> @@ -980,6 +1012,24 @@ gmac_mdio: mdio {
>  			};
>  		};
>  
> +		emac: ethernet at 1c0b000 {
> +			compatible = "allwinner,sun4i-r40-emac";
> +			reg = <0x01c0b000 0x1000>;
> +			interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_EMAC>;
> +			resets = <&ccu RST_BUS_EMAC>;
> +			allwinner,sram = <&emac_sram 1>;
> +			status = "disabled";
> +		};
> +
> +		emac_mdio: mdio at 1c0b080 {
> +			compatible = "allwinner,sun4i-a10-mdio";
> +			reg = <0x01c0b080 0x14>;
> +			status = "disabled";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
>  		mbus: dram-controller at 1c62000 {
>  			compatible = "allwinner,sun8i-r40-mbus";
>  			reg = <0x01c62000 0x1000>;
> -- 
> 2.25.1
> 
>