| * 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 |
| |
| 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. |
| |
| Example: |
| |
| rkdwmmc0@12200000 { |
| compatible = "rockchip,rk3288-dw-mshc"; |
| reg = <0x12200000 0x1000>; |
| interrupts = <0 75 0>; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| }; |
