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| author | Andrew Jeffery <andrew@aj.id.au> | 2017-07-18 08:24:50 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-08-14 16:01:01 +0300 |
| commit | ea47fd80d54174d52150edef290c3f39e17bd62b (patch) | |
| tree | e14d29874fc913eb258367f930617f2dbf3110c7 /Documentation/devicetree/bindings/mmc/sdhci-sirf.txt | |
| parent | bba2e8712602e2d8192f748f588910d1534e4baf (diff) | |
| download | linux-ea47fd80d54174d52150edef290c3f39e17bd62b.tar.xz | |
dt-bindings: pinctrl: aspeed: Add g4 USB functions
The AST2400 contains several USB controllers:
* USB 1.1 Host Controller
* USB 2.0 Host Controller
* USB 2.0 Virtual Hub
* 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 | HID | USB11D1
3 | 2.0 | Host | USB2H1
3 | 2.0 | Device | USB2D1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc/sdhci-sirf.txt')
0 files changed, 0 insertions, 0 deletions