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Diffstat (limited to 'dts/upstream/Bindings/mmc/cavium-mmc.txt')
| -rw-r--r-- | dts/upstream/Bindings/mmc/cavium-mmc.txt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/dts/upstream/Bindings/mmc/cavium-mmc.txt b/dts/upstream/Bindings/mmc/cavium-mmc.txt new file mode 100644 index 00000000000..1433e6201df --- /dev/null +++ b/dts/upstream/Bindings/mmc/cavium-mmc.txt @@ -0,0 +1,57 @@ +* 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; + }; + }; |