| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | * Cavium Octeon & ThunderX MMC controller |
| 2 | |
| 3 | The highspeed MMC host controller on Caviums SoCs provides an interface |
| 4 | for MMC and SD types of memory cards. |
| 5 | |
| 6 | Supported maximum speeds are the ones of the eMMC standard 4.41 as well |
| 7 | as the speed of SD standard 4.0. Only 3.3 Volt is supported. |
| 8 | |
| 9 | Required properties: |
| 10 | - compatible : should be one of: |
| 11 | cavium,octeon-6130-mmc |
| 12 | cavium,octeon-7890-mmc |
| 13 | cavium,thunder-8190-mmc |
| 14 | cavium,thunder-8390-mmc |
| 15 | mmc-slot |
| 16 | - reg : mmc controller base registers |
| 17 | - clocks : phandle |
| 18 | |
| 19 | Optional properties: |
| 20 | - for cd, bus-width and additional generic mmc parameters |
| 21 | please refer to mmc.txt within this directory |
| 22 | - cavium,cmd-clk-skew : number of coprocessor clocks before sampling command |
| 23 | - cavium,dat-clk-skew : number of coprocessor clocks before sampling data |
| 24 | |
| 25 | Deprecated properties: |
| 26 | - spi-max-frequency : use max-frequency instead |
| 27 | - cavium,bus-max-width : use bus-width instead |
| 28 | - power-gpios : use vmmc-supply instead |
| 29 | - cavium,octeon-6130-mmc-slot : use mmc-slot instead |
| 30 | |
| 31 | Examples: |
| 32 | mmc_1_4: mmc@1,4 { |
| 33 | compatible = "cavium,thunder-8390-mmc"; |
| 34 | reg = <0x0c00 0 0 0 0>; /* DEVFN = 0x0c (1:4) */ |
| 35 | #address-cells = <1>; |
| 36 | #size-cells = <0>; |
| 37 | clocks = <&sclk>; |
| 38 | |
| 39 | mmc-slot@0 { |
| 40 | compatible = "mmc-slot"; |
| 41 | reg = <0>; |
| 42 | vmmc-supply = <&mmc_supply_3v3>; |
| 43 | max-frequency = <42000000>; |
| 44 | bus-width = <4>; |
| 45 | cap-sd-highspeed; |
| 46 | }; |
| 47 | |
| 48 | mmc-slot@1 { |
| 49 | compatible = "mmc-slot"; |
| 50 | reg = <1>; |
| 51 | vmmc-supply = <&mmc_supply_3v3>; |
| 52 | max-frequency = <42000000>; |
| 53 | bus-width = <8>; |
| 54 | cap-mmc-highspeed; |
| 55 | non-removable; |
| 56 | }; |
| 57 | }; |