On Tue, Jun 27, 2017 at 11:42:11AM +0930, Andrew Jeffery wrote:

The AST2400 contains several USB controllers:

* USB 1.1 Host Controller
* USB 2.0 Host Controller
* Combined USB 2.0 Virtual Hub and USB 1.1 HID Controller

Pins for three ports are routed to the three controllers such that:

* Port 1 is a dedicated USB 1.1 host port
* Port 2 is shared between the USB 1.1 host and HID controllers
* Port 3 is shared between the USB 2.0 host and Hub controllers

As the pins for port 1 are fixed function there is no associated mux
function or group described in the bindings. Ports 2 and 3 are muxed as
above, and the table below describes the mapping between pinmux function
names and ports:

Port  | USB Version  | USB Mode  | Mux Function
------|--------------|-----------|-------------
1     | 1.1          | Host      | -
2     | 1.1          | Host      | USB11H2
2     | 1.1          | Device    | USB11D1
3     | 2.0          | Host      | USB2H1
3     | 2.0          | Device    | USB2D1

Signed-off-by: Andrew Jeffery <redacted>
---
 Documentation/devicetree/bindings/pinctrl/pinctrl-aspeed.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Acked-by: Rob Herring <redacted>
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