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dc5aee3f9f
Add description of Cavium Octeon and ThunderX SOC device tree bindings. CC: Ulf Hansson <ulf.hansson@linaro.org> CC: Rob Herring <robh+dt@kernel.org> CC: Mark Rutland <mark.rutland@arm.com> CC: devicetree@vger.kernel.org Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Steven J. Hill <steven.hill@cavium.com> Acked-by: Rob Herring <robh+dt@kernel.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
58 lines
1.5 KiB
Plaintext
58 lines
1.5 KiB
Plaintext
* Cavium Octeon & ThunderX MMC controller
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The highspeed MMC host controller on Caviums SoCs provides an interface
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for MMC and SD types of memory cards.
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Supported maximum speeds are the ones of the eMMC standard 4.41 as well
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as the speed of SD standard 4.0. Only 3.3 Volt is supported.
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Required properties:
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- compatible : should be one of:
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cavium,octeon-6130-mmc
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cavium,octeon-7890-mmc
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cavium,thunder-8190-mmc
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cavium,thunder-8390-mmc
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mmc-slot
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- reg : mmc controller base registers
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- clocks : phandle
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Optional properties:
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- for cd, bus-width and additional generic mmc parameters
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please refer to mmc.txt within this directory
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- cavium,cmd-clk-skew : number of coprocessor clocks before sampling command
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- cavium,dat-clk-skew : number of coprocessor clocks before sampling data
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Deprecated properties:
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- spi-max-frequency : use max-frequency instead
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- cavium,bus-max-width : use bus-width instead
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- power-gpios : use vmmc-supply instead
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- cavium,octeon-6130-mmc-slot : use mmc-slot instead
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Examples:
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mmc_1_4: mmc@1,4 {
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compatible = "cavium,thunder-8390-mmc";
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reg = <0x0c00 0 0 0 0>; /* DEVFN = 0x0c (1:4) */
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&sclk>;
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mmc-slot@0 {
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compatible = "mmc-slot";
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reg = <0>;
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vmmc-supply = <&mmc_supply_3v3>;
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max-frequency = <42000000>;
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bus-width = <4>;
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cap-sd-highspeed;
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};
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mmc-slot@1 {
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compatible = "mmc-slot";
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reg = <1>;
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vmmc-supply = <&mmc_supply_3v3>;
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max-frequency = <42000000>;
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bus-width = <8>;
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cap-mmc-highspeed;
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non-removable;
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};
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};
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