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Commit dc5aee3f authored by Jan Glauber's avatar Jan Glauber Committed by Ulf Hansson
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dt-bindings: mmc: Add Cavium SOCs MMC bindings 



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: default avatarJan Glauber <jglauber@cavium.com>
Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarSteven J. Hill <steven.hill@cavium.com>
Acked-by: default avatarRob Herring <robh+dt@kernel.org>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 67b8360a

Documentation/devicetree/bindings/mmc/cavium-mmc.txt

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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;

		};

	};