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

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Message-ID: <90CFB680-D6DA-45E5-9E19-08F577672BA8@flygoat.com>
Date:   Mon, 30 Mar 2020 23:47:32 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.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



于 2020年3月30日 GMT+08:00 下午11:37:21, Sergei Shtylyov <sergei.shtylyov@...entembedded.com> 写到:
>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?
 
Thanks. Will fix in next version.

The space was intent to split address and size but it seems unnecessary.

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

-- 
Jiaxun Yang