linux-kernel - Re: [PATCH v7 7/8] arm64: dts: ti: k3-j721s2-main: Add PCIe device tree node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <d978d797-2e04-89b0-4585-68d28347f469@ti.com>
Date:   Tue, 17 Jan 2023 15:02:29 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     Achal Verma <a-verma1@...com>
CC:     Andrew Davis <afd@...com>, Matt Ranostay <mranostay@...com>,
        <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <r-gunasekaran@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <s-vadapalli@...com>
Subject: Re: [PATCH v7 7/8] arm64: dts: ti: k3-j721s2-main: Add PCIe device
 tree node

Hello Achal,

On 17/01/23 14:53, Achal Verma wrote:
>  Tue, Nov 29, 2022 at 11:53:46AM -0600, Andrew Davis wrote:
>> On 11/22/22 4:16 AM, Matt Ranostay wrote:
>>> From: Aswath Govindraju <a-govindraju@...com>
>>>
>>> Add PCIe1 RC device tree node for the single PCIe instance present on
>>> the j721s2.
>>>
>>> Reviewed-by: Siddharth Vadapalli <s-vadapalli@...com>
>>> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
>>> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
>>> Signed-off-by: Matt Ranostay <mranostay@...com>
>>> ---
>>>   arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 41 ++++++++++++++++++++++
>>>   1 file changed, 41 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>>> index 2858ba589d54..27631ef32bf5 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
>>> @@ -841,6 +841,47 @@ serdes0: serdes@...0000 {
>>>   		};
>>>   	};
>>> +	pcie1_rc: pcie@...0000 {
>>
>> NIT: Not sure we need to call this "_rc", and "1", 0 index these names for
>> consistency, "pcie0".
> 
> Sure, I will name this node as "pcie0_rc" in next patch and "_rc" is because it can be used in endpoint mode too for which "pcie0_ep" node can be added in future.

The naming is based on the PCIe instance documented in the Technical Reference
Manual (TRM). For example, consider J7200 SoC which has "pcie1_rc" even though
it has no "pcie0_rc". This convention is based on the numbering used in the TRM.

Regards,
Siddharth.