projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 028583a4 KH |
1 | Amlogic SD / eMMC controller for S905/GXBB family SoCs |
| 2 | ||
| 3 | The MMC 5.1 compliant host controller on Amlogic provides the | |
| 4 | interface for SD, eMMC and SDIO devices. | |
| 5 | ||
| 6 | This file documents the properties in addition to those available in | |
| 7 | the MMC core bindings, documented by mmc.txt. | |
| 8 | ||
| 9 | Required properties: | |
| 10 | - compatible : contains one of: | |
| 11 | - "amlogic,meson-gx-mmc" | |
| 12 | - "amlogic,meson-gxbb-mmc" | |
| 13 | - "amlogic,meson-gxl-mmc" | |
| 14 | - "amlogic,meson-gxm-mmc" | |
| 15 | - clocks : A list of phandle + clock-specifier pairs for the clocks listed in clock-names. | |
| 16 | - clock-names: Should contain the following: | |
| 17 | "core" - Main peripheral bus clock | |
| 18 | "clkin0" - Parent clock of internal mux | |
| 19 | "clkin1" - Other parent clock of internal mux | |
| bdf63108 | 20 | The driver has an internal mux clock which switches between clkin0 and clkin1 depending on the |
| 028583a4 KH |
21 | clock rate requested by the MMC core. |
| 22 | ||
| 23 | Example: | |
| 24 | ||
| 25 | sd_emmc_a: mmc@70000 { | |
| 26 | compatible = "amlogic,meson-gxbb-mmc"; | |
| 27 | reg = <0x0 0x70000 0x0 0x2000>; | |
| 28 | interrupts = < GIC_SPI 216 IRQ_TYPE_EDGE_RISING>; | |
| 29 | clocks = <&clkc CLKID_SD_EMMC_A>, <&xtal>, <&clkc CLKID_FCLK_DIV2>; | |
| 30 | clock-names = "core", "clkin0", "clkin1"; | |
| 31 | pinctrl-0 = <&emmc_pins>; | |
| 32 | }; |