linux-kernel - Re: [PATCH v1 3/3] riscv: dts: starfive: add PCIe dts configuration for JH7110

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Date:   Thu, 6 Apr 2023 20:25:54 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Minda Chen <minda.chen@...rfivetech.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        Conor Dooley <conor@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-pci@...r.kernel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mason Huo <mason.huo@...rfivetech.com>,
        Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
        Kevin Xie <kevin.xie@...rfivetech.com>
Subject: Re: [PATCH v1 3/3] riscv: dts: starfive: add PCIe dts configuration
 for JH7110

On 06/04/2023 13:11, Minda Chen wrote:
> The PCIe is a PCIe2, single lane PCIe compliant controller.
> 
> Signed-off-by: Minda Chen <minda.chen@...rfivetech.com>
> ---
>  .../jh7110-starfive-visionfive-2.dtsi         | 58 ++++++++++++
>  arch/riscv/boot/dts/starfive/jh7110.dtsi      | 88 +++++++++++++++++++
>  2 files changed, 146 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> index cf0a66faf5d3..4552919e69b0 100644
> --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> @@ -191,6 +191,50 @@
>  		};
>  	};
>  
> +	pcie0_wake_default: pcie0_wake_default {

No underscores in node names. Test your patches against bindings before
sending.


>  	uart0_pins: uart0-0 {
>  		tx-pins {
>  			pinmux = <GPIOMUX(5, GPOUT_SYS_UART0_TX,
> @@ -228,3 +272,17 @@
>  	dr_mode = "peripheral";
>  	status = "okay";
>  };
> +
> +&pcie0 {
> +	pinctrl-names = "default";
> +	reset-gpios = <&sysgpio 26 GPIO_ACTIVE_LOW>;
> +	phys = <&pciephy0>;
> +	status = "okay";
> +};
> +
> +&pcie1 {
> +	pinctrl-names = "default";
> +	reset-gpios = <&sysgpio 28 GPIO_ACTIVE_LOW>;
> +	phys = <&pciephy1>;
> +	status = "okay";
> +};
> diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> index 2f67196ffac0..c309ec550ba7 100644
> --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
> +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> @@ -642,5 +642,93 @@
>  			#reset-cells = <1>;
>  			power-domains = <&pwrc JH7110_PD_VOUT>;
>  		};
> +
> +		pcie0: pcie@...00000 {

Lower case hex.

> +			compatible = "starfive,jh7110-pcie";
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +			#interrupt-cells = <1>;

Why reg is not second property?

> +			reg = <0x0 0x2B000000 0x0 0x1000000
> +			       0x9 0x40000000 0x0 0x10000000>;
> +			reg-names = "reg", "config";
> +			device_type = "pci";
> +			starfive,stg-syscon = <&stg_syscon 0xc0 0xc4 0x130 0x1b8>;
> +			bus-range = <0x0 0xff>;
> +			ranges = <0x82000000  0x0 0x30000000  0x0 0x30000000 0x0 0x08000000>,
> +				 <0xc3000000  0x9 0x00000000  0x9 0x00000000 0x0 0x40000000>;
> +			interrupts = <56>;

Your binding requires cells, so I am pretty sure you did not test what
you wrote.



Best regards,
Krzysztof