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> --- - v1 can be viewed here: https://lore.kernel.org/linux-arm-msm/20220725180916.2850228-1-bhupesh.sharma@xxxxxxxxxx/ - Rebased on linux-next/master .../devicetree/bindings/mmc/mmc-controller.yaml | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index ff5ce89e5111..802e3ca8be4d 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -88,11 +88,18 @@ properties: default: 1 max-frequency: - description: - Maximum operating frequency of the bus. + description: | + Maximum operating frequency of the bus: + - 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. + $ref: /schemas/types.yaml#/definitions/uint32 minimum: 400000 - maximum: 200000000 + maximum: 384000000 disable-wp: $ref: /schemas/types.yaml#/definitions/flag -- 2.35.3
