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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt b/kernel/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt new file mode 100644 index 000000000..4bf41d833 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt @@ -0,0 +1,43 @@ +* 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 : "allwinner,sun4i-a10-mmc" or "allwinner,sun5i-a13-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"; + }; |