linux-kernel - Re: [PATCH v2 5/6] arm64: dts: meson-g12a: Add PCIe node

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Date:   Mon, 16 Sep 2019 14:42:42 +0100
From:   Andrew Murray <andrew.murray@....com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, lorenzo.pieralisi@....com, kishon@...com,
        bhelgaas@...gle.com, linux-amlogic@...ts.infradead.org,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, yue.wang@...ogic.com, maz@...nel.org,
        repk@...plefau.lt, nick@...das.com, gouwa@...das.com
Subject: Re: [PATCH v2 5/6] arm64: dts: meson-g12a: Add PCIe node

On Mon, Sep 16, 2019 at 02:50:21PM +0200, Neil Armstrong wrote:
> This adds the Amlogic G12A PCI Express controller node, also
> using the USB3+PCIe Combo PHY.
> 
> The PHY mode selection is static, thus the USB3+PCIe Combo PHY
> phandle would need to be removed from the USB control node if the
> shared differential lines are used for PCIe instead of USB3.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>

Reviewed-by: Andrew Murray <andrew.murray@....com>

> ---
>  .../boot/dts/amlogic/meson-g12-common.dtsi    | 33 +++++++++++++++++++
>  arch/arm64/boot/dts/amlogic/meson-sm1.dtsi    |  4 +++
>  2 files changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> index 852cf9cf121b..7330dc37b7a6 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> @@ -95,6 +95,39 @@
>  		#size-cells = <2>;
>  		ranges;
>  
> +		pcie: pcie@...00000 {
> +			compatible = "amlogic,g12a-pcie", "snps,dw-pcie";
> +			reg = <0x0 0xfc000000 0x0 0x400000
> +			       0x0 0xff648000 0x0 0x2000
> +			       0x0 0xfc400000 0x0 0x200000>;
> +			reg-names = "elbi", "cfg", "config";
> +			interrupts = <GIC_SPI 221 IRQ_TYPE_LEVEL_HIGH>;
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 0>;
> +			interrupt-map = <0 0 0 0 &gic GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>;
> +			bus-range = <0x0 0xff>;
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +			device_type = "pci";
> +			ranges = <0x81000000 0 0 0x0 0xfc600000 0 0x00100000
> +				  0x82000000 0 0xfc700000 0x0 0xfc700000 0 0x1900000>;
> +
> +			clocks = <&clkc CLKID_PCIE_PHY
> +				  &clkc CLKID_PCIE_COMB
> +				  &clkc CLKID_PCIE_PLL>;
> +			clock-names = "general",
> +				      "pclk",
> +				      "port";
> +			resets = <&reset RESET_PCIE_CTRL_A>,
> +				 <&reset RESET_PCIE_APB>;
> +			reset-names = "port",
> +				      "apb";
> +			num-lanes = <1>;
> +			phys = <&usb3_pcie_phy PHY_TYPE_PCIE>;
> +			phy-names = "pcie";
> +			status = "disabled";
> +		};
> +
>  		ethmac: ethernet@...f0000 {
>  			compatible = "amlogic,meson-axg-dwmac",
>  				     "snps,dwmac-3.70a",
> diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
> index 91492819d0d8..ee9ea3c69433 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
> @@ -135,6 +135,10 @@
>  	power-domains = <&pwrc PWRC_SM1_ETH_ID>;
>  };
>  
> +&pcie {
> +	power-domains = <&pwrc PWRC_SM1_PCIE_ID>;
> +};
> +
>  &pwrc {
>  	compatible = "amlogic,meson-sm1-pwrc";
>  };
> -- 
> 2.22.0
>