| Message ID | 20221107112246.69242-1-b-kapoor@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: dts: ti: k3-j721e-main: Remove ti,strobe-sel property | expand |
On 16:52-20221107, Bhavya Kapoor wrote: > According to latest errata of J721e [1], HS400 mode is not supported > in MMCSD0 subsystem (i2024) . Speed modes supported has been already > updated in PATCH eb8f6194e807. 'ti,strobe-sel' property is only eb8f6194e807 isn't a PATCH :) See Documentation/process/submitting-patches.rst line 99 as an example how to refer to specific commits. > required by HS400 speed mode and thus needs to be removed from kernel > dtsi for J721e soc. s/soc/SoC > > 'ti,strobe-sel' is read in sdhci_am654.c line 733 and gets stored in > sdhci_am654->strb_sel. This sdhci_am654->strb_sel is used at only one > place in sdhci_am654.c line 291 which will only get used if HS400 > is enabled. Please don't describe driver behavior in device tree patch. DT binding should indicate the property behavior. > > Thus, drop 'ti,strobe-sel' property from kernel dtsi for J721e soc. > > [.] https://www.ti.com/lit/er/sprz455/sprz455.pdf Should be [1] ? I think we could simplify it by saying that the commit that implemented the patch missed dropping ti,strobe-sel property that is only meant for HS400. (please rephrase appropriately). Documentation/devicetree/bindings/mmc/sdhci-am654.yaml Now, that said - this could be enforced in dt-schema to prevent such a miss from taking place (if then required) Might be a case to post a separate patch for the enforcement? > > Fixes: eb8f6194e807 ("arm64: dts: ti: k3-j721e-main: Update the speed modes supported and their itap delay values for MMCSD subsystems") > Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com> > --- > arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi > index 917c9dc99efa..e4748a838d83 100644 > --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi > @@ -1094,7 +1094,6 @@ > ti,itap-del-sel-mmc-hs = <0xa>; > ti,itap-del-sel-ddr52 = <0x3>; > ti,trm-icp = <0x8>; > - ti,strobe-sel = <0x77>; > dma-coherent; > }; > > -- > 2.20.1 >
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi index 917c9dc99efa..e4748a838d83 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi @@ -1094,7 +1094,6 @@ ti,itap-del-sel-mmc-hs = <0xa>; ti,itap-del-sel-ddr52 = <0x3>; ti,trm-icp = <0x8>; - ti,strobe-sel = <0x77>; dma-coherent; };
According to latest errata of J721e [1], HS400 mode is not supported in MMCSD0 subsystem (i2024) . Speed modes supported has been already updated in PATCH eb8f6194e807. 'ti,strobe-sel' property is only required by HS400 speed mode and thus needs to be removed from kernel dtsi for J721e soc. 'ti,strobe-sel' is read in sdhci_am654.c line 733 and gets stored in sdhci_am654->strb_sel. This sdhci_am654->strb_sel is used at only one place in sdhci_am654.c line 291 which will only get used if HS400 is enabled. Thus, drop 'ti,strobe-sel' property from kernel dtsi for J721e soc. [.] https://www.ti.com/lit/er/sprz455/sprz455.pdf Fixes: eb8f6194e807 ("arm64: dts: ti: k3-j721e-main: Update the speed modes supported and their itap delay values for MMCSD subsystems") Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com> --- arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 1 - 1 file changed, 1 deletion(-)