@@ -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(-)