[deliverable/linux.git] / Documentation / devicetree / bindings / mmc / samsung-sdhci.txt

* Samsung's SDHCI Controller device tree bindings

Samsung's SDHCI controller is used as a connectivity interface with external
MMC, SD and eMMC storage mediums. This file documents differences between the
core mmc properties described by mmc.txt and the properties used by the
Samsung implementation of the SDHCI controller.

Required SoC Specific Properties:
- compatible: should be one of the following
  - "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci
    controller.
  - "samsung,exynos4210-sdhci": For controllers compatible with Exynos4 sdhci
    controller.

Required Board Specific Properties:
- pinctrl-0: Should specify pin control groups used for this controller.
- pinctrl-names: Should contain only one value - "default".

Example:
	sdhci@12530000 {
		compatible = "samsung,exynos4210-sdhci";
		reg = <0x12530000 0x100>;
		interrupts = <0 75 0>;
		bus-width = <4>;
		cd-gpios = <&gpk2 2 0>;
		pinctrl-names = "default";
		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4>;
	};

	Note: This example shows both SoC specific and board specific properties
	in a single device node. The properties can be actually be separated
	into SoC specific node and board specific node.
Commit	Line	Data
cd1b00eb TA	1	* Samsung's SDHCI Controller device tree bindings
	2
	3	Samsung's SDHCI controller is used as a connectivity interface with external
	4	MMC, SD and eMMC storage mediums. This file documents differences between the
	5	core mmc properties described by mmc.txt and the properties used by the
c98be0c9	6	Samsung implementation of the SDHCI controller.
cd1b00eb	7
cd1b00eb TA	8	Required SoC Specific Properties:
	9	- compatible: should be one of the following
	10	- "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci
	11	controller.
	12	- "samsung,exynos4210-sdhci": For controllers compatible with Exynos4 sdhci
	13	controller.
	14
	15	Required Board Specific Properties:
e19499ae TA	16	- pinctrl-0: Should specify pin control groups used for this controller.
e19499ae TA	17	- pinctrl-names: Should contain only one value - "default".
cd1b00eb TA	18
	19	Example:
	20	sdhci@12530000 {
	21	compatible = "samsung,exynos4210-sdhci";
	22	reg = <0x12530000 0x100>;
	23	interrupts = <0 75 0>;
	24	bus-width = <4>;
e19499ae	25	cd-gpios = <&gpk2 2 0>;
b96efccb	26	pinctrl-names = "default";
e19499ae	27	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4>;
cd1b00eb TA	28	};
	29
	30	Note: This example shows both SoC specific and board specific properties
f21ccfa0	31	in a single device node. The properties can be actually be separated
cd1b00eb	32	into SoC specific node and board specific node.