Commit 52483609 authored by Bhupesh Sharma's avatar Bhupesh Sharma Committed by Ulf Hansson
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dt-bindings: mmc: Set maximum documented operating frequency as 384MHz 

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: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarBhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220726084520.2895454-1-bhupesh.sharma@linaro.org


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 80e78fcc

Documentation/devicetree/bindings/mmc/mmc-controller.yaml

+10 −3
Original line number Diff line number Diff line
@@ -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