On 26.03.2016 12:14, Marek Vasut wrote:

Hi!

I noticed that arch/arc/boot/dts/axs10x_mb.dtsi uses "altr," prefix in
the DT compatible string:

mmc@0x15000 {
        compatible = "altr,socfpga-dw-mshc";
        reg = < 0x15000 0x400 >;
        num-slots = < 1 >;
        fifo-depth = < 16 >;
        card-detect-delay = < 200 >;
        clocks = <&apbclk>, <&mmcclk>;
        clock-names = "biu", "ciu";
        interrupts = < 7 >;
        bus-width = < 4 >;
};

I don't think this is OK, since ARC is unrelated to Altera, which is
what the "altr," prefix stands for. I think the socfpga-dw-mshc shim
should be extended with another compatibility string, something like
"snps,arc-dw-mshc" and the axs10x_mb.dtsi should be adjusted
accordingly. What do you think ?

There is "snps,dw-mshc" described in
Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt and supported by
dw_mmc host controller driver.