于 2017年9月28日 GMT+08:00 下午11:11:03, Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> 写到:
>Hi,
>
>On Thu, Sep 28, 2017 at 09:25:41AM +0000, Icenowy Zheng wrote:
>> + /*
>> + * The max-frequency properties in all MMC controller nodes
>> + * are conservative values proven to work on Banana Pi M2
>> + * Ultra (the first community available R40 board).
>> + * As the board doesn't wire MMC3 out, the property is not
>> + * set in MMC3.
>> + * TODO: measure the accurate max frequency of the controllers.
>> + */
>> + mmc0: mmc@1c0f000 {
>> + compatible = "allwinner,sun8i-r40-mmc",
>> + "allwinner,sun50i-a64-mmc";
>> + reg = <0x01c0f000 0x1000>;
>> + clocks = <&ccu CLK_BUS_MMC0>, <&ccu CLK_MMC0>;
>> + clock-names = "ahb", "mmc";
>> + resets = <&ccu RST_BUS_MMC0>;
>> + reset-names = "ahb";
>> + pinctrl-0 = <&mmc0_pins>;
>> + pinctrl-names = "default";
>> + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>> + max-frequency = <25000000>;
>> + status = "disabled";
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + };
>
>Sorry if it wasn't really clear, but my point was more than you should
>just drop the max-frequency property
Then set it in the boards' DTS?
>
>Maxime
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