| Message ID | 20220725180916.2850228-1-bhupesh.sharma@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | dt-bindings: mmc: Set maximum documented operating frequency as 384MHz | expand |
On Mon, Jul 25, 2022 at 12:09 PM Bhupesh Sharma <bhupesh.sharma@linaro.org> wrote: > > As Ulf noted in [1], the maximum operating frequency > documented in the mmc-controller device-tree bindings > should be updated to the maximum frequency supported > by the mmc controller(s). Please send DT patches to the DT list so checks run and they are in the review queue. > Without this fix in place, the 'make dtbs_check' reports > issues with 'max-frequency' value for ipq8074 sdhci node: > > arch/arm64/boot/dts/qcom/ipq8074-hk01.dtb: mmc@7824900: > max-frequency:0:0: 384000000 is greater than the maximum of 200000000 > > [1]. https://www.spinics.net/lists/kernel/msg4442049.html > > Cc: Ulf Hansson <ulf.hansson@linaro.org> > Cc: Bjorn Andersson <bjorn.andersson@linaro.org> > Cc: Rob Herring <robh@kernel.org> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org> > --- > - Rebased on linux-next/master > > .../devicetree/bindings/mmc/mmc-controller.yaml | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > index ff5ce89e5111..c49f3060c24a 100644 > --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > @@ -87,12 +87,19 @@ properties: > enum: [1, 4, 8] > default: 1 > > + # Maximum operating frequency: > + # - for eMMC, the maximum supported frequency is 200MHz, > + # - for SD/SDIO cards the SDR104 mode has a max supported > + # frequency of 208MHz, > + # - some mmc host controllers do support a max frequency > + # upto 384MHz, > + # so lets keep the maximum supported value here. Add to the description instead of a comment. > max-frequency: > description: > Maximum operating frequency of the bus. > $ref: /schemas/types.yaml#/definitions/uint32 > minimum: 400000 > - maximum: 200000000 > + maximum: 384000000 > > disable-wp: > $ref: /schemas/types.yaml#/definitions/flag > -- > 2.35.3 >
Hi Rob, On 7/26/22 1:59 AM, Rob Herring wrote: > On Mon, Jul 25, 2022 at 12:09 PM Bhupesh Sharma > <bhupesh.sharma@linaro.org> wrote: >> >> As Ulf noted in [1], the maximum operating frequency >> documented in the mmc-controller device-tree bindings >> should be updated to the maximum frequency supported >> by the mmc controller(s). > > Please send DT patches to the DT list so checks run and they are in > the review queue. Oops, will do. >> Without this fix in place, the 'make dtbs_check' reports >> issues with 'max-frequency' value for ipq8074 sdhci node: >> >> arch/arm64/boot/dts/qcom/ipq8074-hk01.dtb: mmc@7824900: >> max-frequency:0:0: 384000000 is greater than the maximum of 200000000 >> >> [1]. https://www.spinics.net/lists/kernel/msg4442049.html >> >> Cc: Ulf Hansson <ulf.hansson@linaro.org> >> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> >> Cc: Rob Herring <robh@kernel.org> >> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org> >> --- >> - Rebased on linux-next/master >> >> .../devicetree/bindings/mmc/mmc-controller.yaml | 9 ++++++++- >> 1 file changed, 8 insertions(+), 1 deletion(-) >> >> diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml >> index ff5ce89e5111..c49f3060c24a 100644 >> --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml >> +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml >> @@ -87,12 +87,19 @@ properties: >> enum: [1, 4, 8] >> default: 1 >> >> + # Maximum operating frequency: >> + # - for eMMC, the maximum supported frequency is 200MHz, >> + # - for SD/SDIO cards the SDR104 mode has a max supported >> + # frequency of 208MHz, >> + # - some mmc host controllers do support a max frequency >> + # upto 384MHz, >> + # so lets keep the maximum supported value here. > > Add to the description instead of a comment. Ok, will fix in v2. Thanks, Bhupesh
diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index ff5ce89e5111..c49f3060c24a 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -87,12 +87,19 @@ properties: enum: [1, 4, 8] default: 1 + # Maximum operating frequency: + # - for eMMC, the maximum supported frequency is 200MHz, + # - for SD/SDIO cards the SDR104 mode has a max supported + # frequency of 208MHz, + # - some mmc host controllers do support a max frequency + # upto 384MHz, + # so lets keep the maximum supported value here. max-frequency: description: Maximum operating frequency of the bus. $ref: /schemas/types.yaml#/definitions/uint32 minimum: 400000 - maximum: 200000000 + maximum: 384000000 disable-wp: $ref: /schemas/types.yaml#/definitions/flag
As Ulf noted in [1], the maximum operating frequency documented in the mmc-controller device-tree bindings should be updated to the maximum frequency supported by the mmc controller(s). Without this fix in place, the 'make dtbs_check' reports issues with 'max-frequency' value for ipq8074 sdhci node: arch/arm64/boot/dts/qcom/ipq8074-hk01.dtb: mmc@7824900: max-frequency:0:0: 384000000 is greater than the maximum of 200000000 [1]. https://www.spinics.net/lists/kernel/msg4442049.html Cc: Ulf Hansson <ulf.hansson@linaro.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Rob Herring <robh@kernel.org> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org> --- - Rebased on linux-next/master .../devicetree/bindings/mmc/mmc-controller.yaml | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)