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 };
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