diff options
| author | Roger Quadros <rogerq@ti.com> | 2016-09-20 17:53:55 +0300 |
|---|---|---|
| committer | Anson Huang <Anson.Huang@nxp.com> | 2017-06-14 16:44:08 +0800 |
| commit | 98f75ff2a434bae861e8b6554abe1ea7c390da36 (patch) | |
| tree | 87485a756119645e9b68f04f94ba2e2f6842ab06 /Documentation | |
| parent | c6f69088b6f9ec2eba93ec4c6e844a1617dcecfe (diff) | |
extcon: usb-gpio: Add VBUS detection support
Driver can now work with both ID and VBUS pins or either one of
them.
There can be the following 3 cases
1) Both ID and VBUS GPIOs are available:
ID = LOW -> USB_HOST active, USB inactive
ID = HIGH -> USB_HOST inactive, USB state is same as VBUS.
2) Only ID GPIO is available:
ID = LOW -> USB_HOST active, USB inactive
ID = HIGH -> USB_HOST inactive, USB active
3) Only VBUS GPIO is available:
VBUS = LOW -> USB_HOST inactive, USB inactive
VBUS = HIGH -> USB_HOST inactive, USB active
Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
(cherry picked from commit 541332a13b1ded42097ba96c52c7bc70931e528c)
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt index af0b903de293..dfc14f71e81f 100644 --- a/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt +++ b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt @@ -5,7 +5,10 @@ connected to a GPIO pin. Required properties: - compatible: Should be "linux,extcon-usb-gpio" + +Either one of id-gpio or vbus-gpio must be present. Both can be present as well. - id-gpio: gpio for USB ID pin. See gpio binding. +- vbus-gpio: gpio for USB VBUS pin. Example: Examples of extcon-usb-gpio node in dra7-evm.dts as listed below: extcon_usb1 { |