| Message ID | 20220811203151.179258-1-mail@conchuod.ie |
|---|---|
| State | New |
| Headers | show |
| Series | dt-bindings: mmc: cdns: add card-detect-delay property | expand |
On Fri, Aug 12, 2022 at 9:46 AM <Conor.Dooley@microchip.com> wrote: > > On 12/08/2022 16:33, Rob Herring wrote: > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > > > On Thu, Aug 11, 2022 at 2:32 PM Conor Dooley <mail@conchuod.ie> wrote: > >> > >> From: Conor Dooley <conor.dooley@microchip.com> > >> > >> Upgrading dt-schema to v2022.08 brings with it better handling of > >> unevaluatedProperties, exposing a previously undetected missing > >> property in the cadence sdhci dt-binding: > >> arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dtb: mmc@20008000: Unevaluated properties are not allowed ('card-detect-delay' was unexpected) > >> From schema: Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml > >> > >> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> > >> --- > >> Should this have a fixes tag? If anything, it'd be > >> Fixes: 84723eec251d ("dt-bindings: mmc: cdns: document Microchip MPFS MMC/SDHCI controller") > >> but idk. > > > > No, the common property 'cd-debounce-delay-ms' should be used instead. > > So it's a case of "what's in the dts is wrong so it needs to change"? Yes. > For the future, where is the line drawn between "don't break the dts" > & "don't use bad properties"? Depends... > Only if the property has consumers? > I don't mind, just want to get it right next time ;) In this case, there shouldn't be any compatibility issues because the mmc core has supported the common property longer than the dts existed. If that was not the case, then we'd probably be stuck with the property in the dts file. That still depends on usage in the kernel or elsewhere, in dts files, stability of the platform support, etc. Rob
On 12/08/2022 16:33, Rob Herring wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Thu, Aug 11, 2022 at 2:32 PM Conor Dooley <mail@conchuod.ie> wrote: >> >> From: Conor Dooley <conor.dooley@microchip.com> >> >> Upgrading dt-schema to v2022.08 brings with it better handling of >> unevaluatedProperties, exposing a previously undetected missing >> property in the cadence sdhci dt-binding: >> arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dtb: mmc@20008000: Unevaluated properties are not allowed ('card-detect-delay' was unexpected) >> From schema: Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml >> >> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> >> --- >> Should this have a fixes tag? If anything, it'd be >> Fixes: 84723eec251d ("dt-bindings: mmc: cdns: document Microchip MPFS MMC/SDHCI controller") >> but idk. > > No, the common property 'cd-debounce-delay-ms' should be used instead. While looking for the fixes tag this would require for the dts, I realised that this is just another of the properties that pre-dated my involvement with the dt. I think it's in the same category as ti,fifodepth & was just copied from somewhere else. I think rather than rename it, it should just be outright deleted. cd-debounce-delay-ms depends on cd-gpios, and we don't have any GPIOs wired to the sdcard. Thanks, Conor.
diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml index 4207fed62dfe..99f89eb19356 100644 --- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml +++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml @@ -112,6 +112,13 @@ properties: minimum: 0 maximum: 0x7f + card-detect-delay: + description: + Delay in milli-seconds before detecting card after card + insert event. The default value is 0. + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + required: - compatible - reg