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- * Cavium Octeon & ThunderX MMC controller
- The highspeed MMC host controller on Caviums SoCs provides an interface
- for MMC and SD types of memory cards.
- Supported maximum speeds are the ones of the eMMC standard 4.41 as well
- as the speed of SD standard 4.0. Only 3.3 Volt is supported.
- Required properties:
- - compatible : should be one of:
- cavium,octeon-6130-mmc
- cavium,octeon-7890-mmc
- cavium,thunder-8190-mmc
- cavium,thunder-8390-mmc
- mmc-slot
- - reg : mmc controller base registers
- - clocks : phandle
- Optional properties:
- - for cd, bus-width and additional generic mmc parameters
- please refer to mmc.txt within this directory
- - cavium,cmd-clk-skew : number of coprocessor clocks before sampling command
- - cavium,dat-clk-skew : number of coprocessor clocks before sampling data
- Deprecated properties:
- - spi-max-frequency : use max-frequency instead
- - cavium,bus-max-width : use bus-width instead
- - power-gpios : use vmmc-supply instead
- - cavium,octeon-6130-mmc-slot : use mmc-slot instead
- Examples:
- mmc_1_4: mmc@1,4 {
- compatible = "cavium,thunder-8390-mmc";
- reg = <0x0c00 0 0 0 0>; /* DEVFN = 0x0c (1:4) */
- #address-cells = <1>;
- #size-cells = <0>;
- clocks = <&sclk>;
- mmc-slot@0 {
- compatible = "mmc-slot";
- reg = <0>;
- vmmc-supply = <&mmc_supply_3v3>;
- max-frequency = <42000000>;
- bus-width = <4>;
- cap-sd-highspeed;
- };
- mmc-slot@1 {
- compatible = "mmc-slot";
- reg = <1>;
- vmmc-supply = <&mmc_supply_3v3>;
- max-frequency = <42000000>;
- bus-width = <8>;
- cap-mmc-highspeed;
- non-removable;
- };
- };
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