amlogic,meson-mx-sdio.txt

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    1 * Amlogic Meson6, Meson8 and Meson8b SDIO/MMC controller
    2 
    3 The highspeed MMC host controller on Amlogic SoCs provides an interface
    4 for MMC, SD, SDIO and SDHC types of memory cards.
    5 
    6 Supported maximum speeds are the ones of the eMMC standard 4.41 as well
    7 as the speed of SD standard 2.0.
    8 
    9 The hardware provides an internal "mux" which allows up to three slots
   10 to be controlled. Only one slot can be accessed at a time.
   11 
   12 Required properties:
   13  - compatible : must be one of
   14         - "amlogic,meson8-sdio"
   15         - "amlogic,meson8b-sdio"
   16         along with the generic "amlogic,meson-mx-sdio"
   17  - reg : mmc controller base registers
   18  - interrupts : mmc controller interrupt
   19  - #address-cells : must be 1
   20  - size-cells : must be 0
   21  - clocks : phandle to clock providers
   22  - clock-names : must contain "core" and "clkin"
   23 
   24 Required child nodes:
   25 A node for each slot provided by the MMC controller is required.
   26 NOTE: due to a driver limitation currently only one slot (= child node)
   27       is supported!
   28 
   29 Required properties on each child node (= slot):
   30  - compatible : must be "mmc-slot" (see mmc.txt within this directory)
   31  - reg : the slot (or "port") ID
   32 
   33 Optional properties on each child node (= slot):
   34  - bus-width : must be 1 or 4 (8-bit bus is not supported)
   35  - for cd and all other additional generic mmc parameters
   36    please refer to mmc.txt within this directory
   37 
   38 Examples:
   39         mmc@c1108c20 {
   40                 compatible = "amlogic,meson8-sdio", "amlogic,meson-mx-sdio";
   41                 reg = <0xc1108c20 0x20>;
   42                 interrupts = <0 28 1>;
   43                 #address-cells = <1>;
   44                 #size-cells = <0>;
   45                 clocks = <&clkc CLKID_SDIO>, <&clkc CLKID_CLK81>;
   46                 clock-names = "core", "clkin";
   47 
   48                 slot@1 {
   49                         compatible = "mmc-slot";
   50                         reg = <1>;
   51 
   52                         bus-width = <4>;
   53                 };
   54         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/mmc/amlogic,meson-mx-sdio.txt

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sys/contrib/device-tree/Bindings/mmc/amlogic,meson-mx-sdio.txt