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