[PATCH v4 3/3] dt-bindings: imx6q-pcie: Handle more resets on legacy platforms

[Marek Vasut]

On 11/8/22 19:17, Krzysztof Kozlowski wrote:
> On 06/11/2022 23:25, Marek Vasut wrote:
>> The i.MX6 and i.MX7D does not use block controller to toggle PCIe
>> reset, hence the PCIe DT description contains three reset entries
>> on these older SoCs. Add this exception into the binding document.
>>
>> Signed-off-by: Marek Vasut <marex at denx.de>
>> ---
>> Cc: Fabio Estevam <festevam at gmail.com>
>> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
>> Cc: Lucas Stach <l.stach at pengutronix.de>
>> Cc: Richard Zhu <hongxing.zhu at nxp.com>
>> Cc: Rob Herring <robh+dt at kernel.org>
>> Cc: Shawn Guo <shawnguo at kernel.org>
>> Cc: linux-arm-kernel at lists.infradead.org
>> Cc: NXP Linux Team <linux-imx at nxp.com>
>> To: devicetree at vger.kernel.org
>> ---
>> V2: - Add mx8mq to 3-reset PCIe core variant
>>      - Handle the resets in allOf section
>> V3: - Reinstate reset: maxItems:3 and add minItems:2
>>      - Move reset-names back to main section
>>      - The validation no longer works and introduces errors like these:
>>        arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi-dahlia.dtb: pcie at 33800000: reset-names:0: 'pciephy' was expected
>> V4: - Reinstate reset minItems and maxItems
>>      - Turn the first two reset-names items into enums to cover all
>>        the various name combinations, sort the rest in allOf section
>> ---
>>   .../bindings/pci/fsl,imx6q-pcie.yaml          | 34 +++++++++++++++++--
>>   1 file changed, 32 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
>> index b14c12a47cc1c..46fc29384ed34 100644
>> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
>> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
>> @@ -84,14 +84,16 @@ properties:
>>         - const: pcie_phy
>>   
>>     resets:
>> +    minItems: 2
>>       maxItems: 3
>>       description: Phandles to PCIe-related reset lines exposed by SRC
>>         IP block. Additional required by imx7d-pcie and imx8mq-pcie.
>>   
>>     reset-names:
>> +    minItems: 2
>>       items:
>> -      - const: pciephy
>> -      - const: apps
>> +      - enum: [ pciephy, apps ]
>> +      - enum: [ apps, turnoff ]
>>         - const: turnoff
> 
> I would expect to remove all these entries. I asked to keep reset-names
> with minIetms and maxItems. It works fine with your approach, but why
> having the items in multiple places?

I feel like maybe I'm getting a bit lost in the complexity. I did that ^ 
and it does seem to work, so V5 is coming.