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authorJan Glauber <jglauber@cavium.com>2017-03-30 17:31:23 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2017-04-24 21:42:08 +0200
commitdc5aee3f9f454c35d4e092873b103dc791119e0e (patch)
tree8c86ab4d7c2be66b37d77412d456008767665c3d
parentmmc: core: refactor mmc_request_done() (diff)
downloadlinux-dc5aee3f9f454c35d4e092873b103dc791119e0e.tar.xz
linux-dc5aee3f9f454c35d4e092873b103dc791119e0e.zip
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: 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>
-rw-r--r--Documentation/devicetree/bindings/mmc/cavium-mmc.txt57
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/cavium-mmc.txt b/Documentation/devicetree/bindings/mmc/cavium-mmc.txt
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+++ b/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;
+ };
+ };