linux-kernel - Re: [PATCH 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node

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Date:   Mon, 30 Mar 2020 18:37:21 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>, linux-mips@...r.kernel.org
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Paul Burton <paulburton@...nel.org>, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node

Hello!

On 03/30/2020 02:42 PM, Jiaxun Yang wrote:

> Add PCI Host controller node for Loongson64 with RS780E PCH dts.
> Note that PCI interrupts are probed via legacy way, as different
> machine have different interrupt arrangement, we can't cover all
> of them in dt.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
> ---
>  arch/mips/boot/dts/loongson/rs780e-pch.dtsi | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/mips/boot/dts/loongson/rs780e-pch.dtsi b/arch/mips/boot/dts/loongson/rs780e-pch.dtsi
> index 45c54d555fa4..f09599a4b9d7 100644
> --- a/arch/mips/boot/dts/loongson/rs780e-pch.dtsi
> +++ b/arch/mips/boot/dts/loongson/rs780e-pch.dtsi
> @@ -5,10 +5,25 @@ bus@...00000 {
>  		compatible = "simple-bus";
>  		#address-cells = <2>;
>  		#size-cells = <2>;
> -		ranges = <0 0x10000000 0 0x10000000 0 0x10000000
> +		ranges = <0 0x00000000 0 0x00000000 0 0x00010000 /* ioports */
> +				0 0x10000000 0 0x10000000 0 0x10000000
>  				0 0x40000000 0 0x40000000 0 0x40000000
>  				0xfd 0xfe000000 0xfd 0xfe000000  0 0x2000000 /* PCI Config Space */>;
>  
> +		pci@...00000 {
> +			compatible = "loongson,rs780e-pci";
> +			device_type = "pci";
> +			#address-cells = <3>;
> +			#size-cells = <2>;
> +			#interrupt-cells = <0x1>;

   No need for 0x.

> +
> +			reg = <0 0x1a000000 0 0x02000000>;
> +
> +			ranges = <0x01000000 0x0 0x00004000 0x0 0x00004000  0x0 0x00004000>,
> +				<0x02000000 0x0 0x40000000 0x0 0x40000000  0x0 0x40000000>;

   No need for 0x before 0 here either. And why double spaces?

> +
> +		};
> +
>  		isa {
>  			compatible = "isa";
>  			#address-cells = <2>;
> 

MBR, Sergei