Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 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,rv1108-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RV1108 17 - "rockchip,rk3036-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3036 18 - "rockchip,rk3228-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK322x 19 - "rockchip,rk3328-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3328 20 - "rockchip,rk3368-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3368 21 - "rockchip,rk3399-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3399 22 23 Optional Properties: 24 * clocks: from common clock binding: if ciu_drive and ciu_sample are 25 specified in clock-names, should contain handles to these clocks. 26 27 * clock-names: Apart from the clock-names described in synopsys-dw-mshc.txt 28 two more clocks "ciu-drive" and "ciu-sample" are supported. They are used 29 to control the clock phases, "ciu-sample" is required for tuning high- 30 speed modes. 31 32 * rockchip,default-sample-phase: The default phase to set ciu_sample at 33 probing, low speeds or in case where all phases work at tuning time. 34 If not specified 0 deg will be used. 35 36 * rockchip,desired-num-phases: The desired number of times that the host 37 execute tuning when needed. If not specified, the host will do tuning 38 for 360 times, namely tuning for each degree. 39 40 Example: 41 42 rkdwmmc0@12200000 { 43 compatible = "rockchip,rk3288-dw-mshc"; 44 reg = <0x12200000 0x1000>; 45 interrupts = <0 75 0>; 46 #address-cells = <1>; 47 #size-cells = <0>; 48 };