0629f1558a
Document device tree binding information as required by the Samsung' USB 3.0 controller. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
85 lines
2.3 KiB
Plaintext
85 lines
2.3 KiB
Plaintext
Samsung Exynos SoC USB controller
|
|
|
|
The USB devices interface with USB controllers on Exynos SOCs.
|
|
The device node has following properties.
|
|
|
|
EHCI
|
|
Required properties:
|
|
- compatible: should be "samsung,exynos4210-ehci" for USB 2.0
|
|
EHCI controller in host mode.
|
|
- reg: physical base address of the controller and length of memory mapped
|
|
region.
|
|
- interrupts: interrupt number to the cpu.
|
|
- clocks: from common clock binding: handle to usb clock.
|
|
- clock-names: from common clock binding: Shall be "usbhost".
|
|
|
|
Optional properties:
|
|
- samsung,vbus-gpio: if present, specifies the GPIO that
|
|
needs to be pulled up for the bus to be powered.
|
|
|
|
Example:
|
|
|
|
usb@12110000 {
|
|
compatible = "samsung,exynos4210-ehci";
|
|
reg = <0x12110000 0x100>;
|
|
interrupts = <0 71 0>;
|
|
samsung,vbus-gpio = <&gpx2 6 1 3 3>;
|
|
|
|
clocks = <&clock 285>;
|
|
clock-names = "usbhost";
|
|
};
|
|
|
|
OHCI
|
|
Required properties:
|
|
- compatible: should be "samsung,exynos4210-ohci" for USB 2.0
|
|
OHCI companion controller in host mode.
|
|
- reg: physical base address of the controller and length of memory mapped
|
|
region.
|
|
- interrupts: interrupt number to the cpu.
|
|
- clocks: from common clock binding: handle to usb clock.
|
|
- clock-names: from common clock binding: Shall be "usbhost".
|
|
|
|
Example:
|
|
usb@12120000 {
|
|
compatible = "samsung,exynos4210-ohci";
|
|
reg = <0x12120000 0x100>;
|
|
interrupts = <0 71 0>;
|
|
|
|
clocks = <&clock 285>;
|
|
clock-names = "usbhost";
|
|
};
|
|
|
|
DWC3
|
|
Required properties:
|
|
- compatible: should be "samsung,exynos5250-dwusb3" for USB 3.0 DWC3
|
|
controller.
|
|
- #address-cells, #size-cells : should be '1' if the device has sub-nodes
|
|
with 'reg' property.
|
|
- ranges: allows valid 1:1 translation between child's address space and
|
|
parent's address space
|
|
- clocks: Clock IDs array as required by the controller.
|
|
- clock-names: names of clocks correseponding to IDs in the clock property
|
|
|
|
Sub-nodes:
|
|
The dwc3 core should be added as subnode to Exynos dwc3 glue.
|
|
- dwc3 :
|
|
The binding details of dwc3 can be found in:
|
|
Documentation/devicetree/bindings/usb/dwc3.txt
|
|
|
|
Example:
|
|
usb@12000000 {
|
|
compatible = "samsung,exynos5250-dwusb3";
|
|
clocks = <&clock 286>;
|
|
clock-names = "usbdrd30";
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
ranges;
|
|
|
|
dwc3 {
|
|
compatible = "synopsys,dwc3";
|
|
reg = <0x12000000 0x10000>;
|
|
interrupts = <0 72 0>;
|
|
usb-phy = <&usb2_phy &usb3_phy>;
|
|
};
|
|
};
|