mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-28 22:13:08 +00:00
8b7a47d73d
This adds a property to indicate a port which can switch between host and device mode. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
25 lines
1.1 KiB
Text
25 lines
1.1 KiB
Text
Tegra SOC USB controllers
|
|
|
|
The device node for a USB controller that is part of a Tegra
|
|
SOC is as described in the document "Open Firmware Recommended
|
|
Practice : Universal Serial Bus" with the following modifications
|
|
and additions :
|
|
|
|
Required properties :
|
|
- compatible : Should be "nvidia,tegra20-ehci" for USB controllers
|
|
used in host mode.
|
|
- phy_type : Should be one of "ulpi" or "utmi".
|
|
- nvidia,vbus-gpio : If present, specifies a gpio that needs to be
|
|
activated for the bus to be powered.
|
|
|
|
Optional properties:
|
|
- dr_mode : dual role mode. Indicates the working mode for
|
|
nvidia,tegra20-ehci compatible controllers. Can be "host", "peripheral",
|
|
or "otg". Default to "host" if not defined for backward compatibility.
|
|
host means this is a host controller
|
|
peripheral means it is device controller
|
|
otg means it can operate as either ("on the go")
|
|
- nvidia,has-legacy-mode : boolean indicates whether this controller can
|
|
operate in legacy mode (as APX 2500 / 2600). In legacy mode some
|
|
registers are accessed through the APB_MISC base address instead of
|
|
the USB controller.
|