| * 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-emmc" |
| * "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"; |
| }; |
