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* Rockchip specific extensions to the Synopsys Designware Mobile
Storage Host Controller
The Synopsys designware mobile storage host controller is used to interface
a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
differences between the core Synopsys dw mshc controller properties described
by synopsys-dw-mshc.txt and the properties used by the Rockchip specific
extensions to the Synopsys Designware Mobile Storage Host Controller.
Required Properties:
* compatible: should be
- "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following,
before RK3288
- "rockchip,rk3288-dw-mshc": for Rockchip RK3288
- "rockchip,rv1108-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RV1108
- "rockchip,rk3036-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3036
- "rockchip,rk3328-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3328
- "rockchip,rk3368-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3368
- "rockchip,rk3399-dw-mshc", "rockchip,rk3288-dw-mshc": for Rockchip RK3399
Optional Properties:
* clocks: from common clock binding: if ciu_drive and ciu_sample are
specified in clock-names, should contain handles to these clocks.
* clock-names: Apart from the clock-names described in synopsys-dw-mshc.txt
two more clocks "ciu-drive" and "ciu-sample" are supported. They are used
to control the clock phases, "ciu-sample" is required for tuning high-
speed modes.
* rockchip,default-sample-phase: The default phase to set ciu_sample at
probing, low speeds or in case where all phases work at tuning time.
If not specified 0 deg will be used.
* rockchip,desired-num-phases: The desired number of times that the host
execute tuning when needed. If not specified, the host will do tuning
for 360 times, namely tuning for each degree.
Example:
rkdwmmc0@12200000 {
compatible = "rockchip,rk3288-dw-mshc";
reg = <0x12200000 0x1000>;
interrupts = <0 75 0>;
#address-cells = <1>;
#size-cells = <0>;
};
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