| David Lanzendörfer | 3cbcb160 | 2014-05-12 14:04:48 +0200 | [diff] [blame] | 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: |
| Hans de Goede | b465646 | 2016-07-30 16:25:47 +0200 | [diff] [blame] | 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" |
| Icenowy Zheng | 3d254b5 | 2016-08-05 04:57:14 +0200 | [diff] [blame] | 16 | * "allwinner,sun50i-a64-mmc" |
| David Lanzendörfer | 3cbcb160 | 2014-05-12 14:04:48 +0200 | [diff] [blame] | 17 | - reg : mmc controller base registers |
| Maxime Ripard | 6c09bb8 | 2014-07-12 12:01:33 +0200 | [diff] [blame] | 18 | - clocks : a list with 4 phandle + clock specifier pairs |
| 19 | - clock-names : must contain "ahb", "mmc", "output" and "sample" |
| David Lanzendörfer | 3cbcb160 | 2014-05-12 14:04:48 +0200 | [diff] [blame] | 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>; |
| Maxime Ripard | 6c09bb8 | 2014-07-12 12:01:33 +0200 | [diff] [blame] | 33 | clocks = <&ahb_gates 8>, <&mmc0_clk>, <&mmc0_output_clk>, <&mmc0_sample_clk>; |
| 34 | clock-names = "ahb", "mod", "output", "sample"; |
| David Lanzendörfer | 3cbcb160 | 2014-05-12 14:04:48 +0200 | [diff] [blame] | 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 | }; |