linux-kernel - Re: [RESEND PATCH 1/2] arm64: dts: ti: k3-j721e-main: Add PCIe device tree nodes

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Date:   Mon, 14 Sep 2020 20:28:01 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Nishanth Menon <nm@...com>
CC:     Rob Herring <robh+dt@...nel.org>, Tero Kristo <t-kristo@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 1/2] arm64: dts: ti: k3-j721e-main: Add PCIe device
 tree nodes

Hi Nishanth,

On 14/09/20 6:44 pm, Nishanth Menon wrote:
> On 17:43-20200914, Kishon Vijay Abraham I wrote:
>> Hi Nishanth,
>>
>> On 14/09/20 5:22 pm, Nishanth Menon wrote:
>>> On 16:53-20200914, Kishon Vijay Abraham I wrote:
>>>> Hi Rob,
>>>>
>>>> On 02/09/20 1:07 pm, Kishon Vijay Abraham I wrote:
>>>>> Hi Rob,
>>>>>
>>>>> On 02/09/20 10:24 am, Kishon Vijay Abraham I wrote:
>>>>>> Hi Nishanth,
>>>>>>
>>>>>> On 01/09/20 8:22 pm, Nishanth Menon wrote:
>>>>>>> On 19:36-20200901, Kishon Vijay Abraham I wrote:
>>>>>>>> Add PCIe device tree node (both RC and EP) for the four
>>>>>>>> PCIe instances here.
>>>>>>>>
>>>>>>>> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
>>>>>>>> ---
>>>>>>>>   arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 218
>>>>>>>> ++++++++++++++++++++++
>>>>>>>>   arch/arm64/boot/dts/ti/k3-j721e.dtsi      |   5 +-
>>>>>>>>   2 files changed, 222 insertions(+), 1 deletion(-)
>>>>>>>
>>>>>>>
>>>>>>> Did you look at the diff of the dtbs_check before and after this
>>>>>>> series? I see: https://pastebin.ubuntu.com/p/9fyfrTjx9M/
>>>>>>
>>>>>> I didn't see any errors when I checked for individual bindings
>>>>>> a0393678@...93678-ssd:~/repos/linux$ mkconfig64 dtbs_check
>>>>>> DT_SCHEMA_FILES="Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml"
>>>>>>
>>>>>>    SCHEMA  Documentation/devicetree/bindings/processed-schema.yaml
>>>>>>    DTC     arch/arm64/boot/dts/ti/k3-am654-base-board.dt.yaml
>>>>>>    DTC     arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml
>>>>>>    CHECK   arch/arm64/boot/dts/ti/k3-am654-base-board.dt.yaml
>>>>>>    CHECK   arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml
>>>>>> a0393678@...93678-ssd:~/repos/linux$ mkconfig64 dtbs_check
>>>>>> DT_SCHEMA_FILES="Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml"
>>>>>>
>>>>>>    SCHEMA  Documentation/devicetree/bindings/processed-schema.yamlsimple-bus
>>>>>>    DTC     arch/arm64/boot/dts/ti/k3-am654-base-board.dt.yaml
>>>>>>    DTC     arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml
>>>>>>    CHECK   arch/arm64/boot/dts/ti/k3-am654-base-board.dt.yaml
>>>>>>    CHECK   arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml
>>>>>
>>>>> Can you give hint on why I get ranges is too long error
>>>>> https://pastebin.ubuntu.com/p/cPm2tg3dcV/ which I give mkconfig64
>>>>> dtbs_check but don't see an error when I include "DT_SCHEMA_FILES"?
>>>>
>>>> I debugged this and looks like PCIe "ranges" property conflicts with
>>>> simple-bus.
>>>>
>>>> A diff like below helps to solve the issue
>>>> diff --git a/schemas/simple-bus.yaml b/schemas/simple-bus.yaml
>>>> index 248ac9d..ed818ef 100644
>>>> --- a/schemas/simple-bus.yaml
>>>> +++ b/schemas/simple-bus.yaml
>>>> @@ -39,7 +39,7 @@ patternProperties:
>>>>          oneOf:
>>>>            - items:
>>>>                minItems: 3
>>>> -              maxItems: 6
>>>> +              maxItems: 7
>>>>              minItems: 0
>>>>              maxItems: 1024
>>>>            - $ref: "types.yaml#/definitions/flag"
>>>>
>>>> If this looks right to you, I can post a patch for it. Without fixing
>>>> this we would see false errors for PCIe DT nodes.
>>>
>>> https://github.com/devicetree-org/dt-schema/commit/3baf308b01786788e3ccb9824fce6d7136b21214
>>>
>>> Part of v2020.08.1? Am i missing something?
>>
>> I think I was using a different repo
>> https://github.com/robherring/dt-schema.git.
>>
>> Do you see the following issues you reported earlier with v2020.08.1?
>>
>> +/home/nmenon/Src/opensource/linux/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml:
>> bus@...000: pcie@...0000:ranges: [[16777216, 0, 268439552, 0, 268439552,
>> 0, 65536], [33554432, 0, 268505088, 0, 268505088, 0, 134148096]] is not
>> valid under any of the given schemas (Possible causes of the failure):
>> +
>> /home/nmenon/Src/opensource/linux/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml:
>> bus@...000: pcie@...0000:ranges: True was expected
>> +
>> /home/nmenon/Src/opensource/linux/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml:
>> bus@...000: pcie@...0000:ranges:0: [16777216, 0, 268439552, 0,
>> 268439552, 0, 65536] is too long
>> +
>> /home/nmenon/Src/opensource/linux/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dt.yaml:
>> bus@...000: pcie@...0000:ranges:1: [33554432, 0, 268505088, 0,
>> 268505088, 0, 134148096] is too long
> 
> 
> Arrgh.. you are right.. Looks like one of my PCs still had 2020.8
> instead of 2020.8.1. We just need to figure out what is going on with
> syscon.yaml as against ti,j721e-system-controller.yaml..

I think I'll use the existing TI specific compatible string for syscon here.

Thanks
Kishon