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@xxxxxxxxxx> Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Cc: Rob Herring <robh@xxxxxxxxxx> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxxxxxx> --- - 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. 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
