[PATCH v10 8/8] dt-bindings: mmc: Add Cavium SOCs MMC bindings

[Jan Glauber <jglauber@cavium.com>]

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>
---
 .../devicetree/bindings/mmc/octeon-mmc.txt         | 59 ++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/octeon-mmc.txt

diff --git a/Documentation/devicetree/bindings/mmc/octeon-mmc.txt b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
new file mode 100644
index 0000000..aad02eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
@@ -0,0 +1,59 @@
+* 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-6130-mmc-slot"
+   * "cavium,octeon-7890-mmc"
+   * "cavium,octeon-7890-mmc-slot"
+   * "cavium,thunder-8190-mmc"
+   * "cavium,thunder-8190-mmc-slot"
+   * "cavium,thunder-8390-mmc"
+   * "cavium,thunder-8390-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
+
+Examples:
+	- Within .dtsi:
+	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>;
+	};
+
+	- Within dts:
+	mmc-slot@0 {
+		compatible = "cavium,thunder-8390-mmc-slot";
+		reg = <0>;
+		voltage-ranges = <3300 3300>;
+		max-frequency = <42000000>;
+		bus-width = <4>;
+		cap-sd-highspeed;
+	};
+	mmc-slot@1 {
+		compatible = "cavium,thunder-8390-mmc-slot";
+		reg = <1>;
+		voltage-ranges = <3300 3300>;
+		max-frequency = <42000000>;
+		bus-width = <8>;
+		cap-mmc-highspeed;
+		non-removable;
+	};
-- 
2.9.0.rc0.21.g7777322