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- * Allwinner sunxi MMC controller
- The highspeed MMC host controller on Allwinner SoCs provides an interface
- for MMC, SD and SDIO types of memory cards.
- Supported maximum speeds are the ones of the eMMC standard 4.5 as well
- as the speed of SD standard 3.0.
- Absolute maximum transfer rate is 200MB/s
- Required properties:
- - compatible : should be one of:
- * "allwinner,sun4i-a10-mmc"
- * "allwinner,sun5i-a13-mmc"
- * "allwinner,sun7i-a20-mmc"
- * "allwinner,sun9i-a80-mmc"
- * "allwinner,sun50i-a64-mmc"
- - reg : mmc controller base registers
- - clocks : a list with 4 phandle + clock specifier pairs
- - clock-names : must contain "ahb", "mmc", "output" and "sample"
- - interrupts : mmc controller interrupt
- Optional properties:
- - resets : phandle + reset specifier pair
- - reset-names : must contain "ahb"
- - for cd, bus-width and additional generic mmc parameters
- please refer to mmc.txt within this directory
- Examples:
- - Within .dtsi:
- mmc0: mmc@01c0f000 {
- compatible = "allwinner,sun5i-a13-mmc";
- reg = <0x01c0f000 0x1000>;
- clocks = <&ahb_gates 8>, <&mmc0_clk>, <&mmc0_output_clk>, <&mmc0_sample_clk>;
- clock-names = "ahb", "mod", "output", "sample";
- interrupts = <0 32 4>;
- status = "disabled";
- };
- - Within dts:
- mmc0: mmc@01c0f000 {
- pinctrl-names = "default", "default";
- pinctrl-0 = <&mmc0_pins_a>;
- pinctrl-1 = <&mmc0_cd_pin_reference_design>;
- bus-width = <4>;
- cd-gpios = <&pio 7 1 0>; /* PH1 */
- cd-inverted;
- status = "okay";
- };
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