mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
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>
57 lines
1.5 KiB
Text
57 lines
1.5 KiB
Text
* 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;
|
|
};
|
|
};
|