Documentation/devicetree/bindings/mmc/sunxi-mmc.txt

   1 * Allwinner sunxi MMC controller
   2
   3 The highspeed MMC host controller on Allwinner SoCs provides an interface
   4 for MMC, SD and SDIO types of memory cards.
   5
   6 Supported maximum speeds are the ones of the eMMC standard 4.5 as well
   7 as the speed of SD standard 3.0.
   8 Absolute maximum transfer rate is 200MB/s
   9
  10 Required properties:
  11  - compatible : should be one of:
  12    * "allwinner,sun4i-a10-mmc"
  13    * "allwinner,sun5i-a13-mmc"
  14    * "allwinner,sun7i-a20-mmc"
  15    * "allwinner,sun9i-a80-mmc"
  16    * "allwinner,sun50i-a64-mmc"
  17  - reg : mmc controller base registers
  18  - clocks : a list with 4 phandle + clock specifier pairs
  19  - clock-names : must contain "ahb", "mmc", "output" and "sample"
  20  - interrupts : mmc controller interrupt
  21
  22 Optional properties:
  23  - resets : phandle + reset specifier pair
  24  - reset-names : must contain "ahb"
  25  - for cd, bus-width and additional generic mmc parameters
  26    please refer to mmc.txt within this directory
  27
  28 Examples:
  29         - Within .dtsi:
  30         mmc0: mmc@01c0f000 {
  31                 compatible = "allwinner,sun5i-a13-mmc";
  32                 reg = <0x01c0f000 0x1000>;
  33                 clocks = <&ahb_gates 8>, <&mmc0_clk>, <&mmc0_output_clk>, <&mmc0_sample_clk>;
  34                 clock-names = "ahb", "mod", "output", "sample";
  35                 interrupts = <0 32 4>;
  36                 status = "disabled";
  37         };
  38
  39         - Within dts:
  40         mmc0: mmc@01c0f000 {
  41                 pinctrl-names = "default", "default";
  42                 pinctrl-0 = <&mmc0_pins_a>;
  43                 pinctrl-1 = <&mmc0_cd_pin_reference_design>;
  44                 bus-width = <4>;
  45                 cd-gpios = <&pio 7 1 0>; /* PH1 */
  46                 cd-inverted;
  47                 status = "okay";
  48         };