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Documentation / devicetree / bindings / mmc / rockchip-dw-mshc.txt




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:42 EST.

1	* Rockchip specific extensions to the Synopsys Designware Mobile
2	  Storage Host Controller
3	
4	The Synopsys designware mobile storage host controller is used to interface
5	a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
6	differences between the core Synopsys dw mshc controller properties described
7	by synopsys-dw-mshc.txt and the properties used by the Rockchip specific
8	extensions to the Synopsys Designware Mobile Storage Host Controller.
9	
10	Required Properties:
11	
12	* compatible: should be
13		- "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following,
14								before RK3288
15		- "rockchip,rk3288-dw-mshc": for Rockchip RK3288
16		- "rockchip,rk3036-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3036
17		- "rockchip,rk3368-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3368
18		- "rockchip,rk3399-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3399
19	
20	Optional Properties:
21	* clocks: from common clock binding: if ciu_drive and ciu_sample are
22	  specified in clock-names, should contain handles to these clocks.
23	
24	* clock-names: Apart from the clock-names described in synopsys-dw-mshc.txt
25	  two more clocks "ciu-drive" and "ciu-sample" are supported. They are used
26	  to control the clock phases, "ciu-sample" is required for tuning high-
27	  speed modes.
28	
29	* rockchip,default-sample-phase: The default phase to set ciu_sample at
30	  probing, low speeds or in case where all phases work at tuning time.
31	  If not specified 0 deg will be used.
32	
33	Example:
34	
35		rkdwmmc0@12200000 {
36			compatible = "rockchip,rk3288-dw-mshc";
37			reg = <0x12200000 0x1000>;
38			interrupts = <0 75 0>;
39			#address-cells = <1>;
40			#size-cells = <0>;
41		};
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