1* Samsung's S3C24XX MMC/SD/SDIO controller device tree bindings
2
3Samsung's S3C24XX MMC/SD/SDIO controller is used as a connectivity interface
4with external MMC, SD and SDIO storage mediums.
5
6This file documents differences between the core mmc properties described by
7mmc.txt and the properties used by the Samsung S3C24XX MMC/SD/SDIO controller
8implementation.
9
10Required SoC Specific Properties:
11- compatible: should be one of the following
12  - "samsung,s3c2410-sdi": for controllers compatible with s3c2410
13  - "samsung,s3c2412-sdi": for controllers compatible with s3c2412
14  - "samsung,s3c2440-sdi": for controllers compatible with s3c2440
15- reg: register location and length
16- interrupts: mmc controller interrupt
17- clocks: Should reference the controller clock
18- clock-names: Should contain "sdi"
19
20Required Board Specific Properties:
21- pinctrl-0: Should specify pin control groups used for this controller.
22- pinctrl-names: Should contain only one value - "default".
23
24Optional Properties:
25- bus-width: number of data lines (see mmc.txt)
26- cd-gpios: gpio for card detection (see mmc.txt)
27- wp-gpios: gpio for write protection (see mmc.txt)
28
29Example:
30
31	mmc0: mmc@5a000000 {
32		compatible = "samsung,s3c2440-sdi";
33		pinctrl-names = "default";
34		pinctrl-0 = <&sdi_pins>;
35		reg = <0x5a000000 0x100000>;
36		interrupts = <0 0 21 3>;
37		clocks = <&clocks PCLK_SDI>;
38		clock-names = "sdi";
39		bus-width = <4>;
40		cd-gpios = <&gpg 8 GPIO_ACTIVE_LOW>;
41		wp-gpios = <&gph 8 GPIO_ACTIVE_LOW>;
42	};
43