Re: [PATCH 1/5] dt-bindings: connector: add optional properties for Type-B

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,

On 08-03-19 07:13, Chunfeng Yun wrote:
Add id-gpios, vbus-gpios, vbus-supply and pinctrl properties for
usb-b-connector

Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
  .../devicetree/bindings/connector/usb-connector.txt    | 10 ++++++++++
  1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/connector/usb-connector.txt b/Documentation/devicetree/bindings/connector/usb-connector.txt
index a9a2f2fc44f2..7a07b0f4f973 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.txt
+++ b/Documentation/devicetree/bindings/connector/usb-connector.txt
@@ -17,6 +17,16 @@ Optional properties:
  - self-powered: Set this property if the usb device that has its own power
    source.
+Optional properties for usb-b-connector:
+- id-gpios: gpio for USB ID pin.

What about boards where the ID pin is *not* connected to a GPIO,
but e.g. to a special pin on the PMIC which can also detect
an ACA adapter ? Currently this case is handled by extcon
drivers, but we have no way to set e.g. vbus-supply for the
connector. Maybe in this case the usb-connector node should
be a child of the PMIC node ?

And in many cases there also is a mux to switch the datalines
between the host and device(gadget) controllers, how should
that be described in this model?  See the new usb-role-switch
code under drivers/usb/roles

In some cases the mux is controlled through a gpio, so we
may want to add a "mux-gpios" here in which case we also
need to define what 0/1 means.

+- vbus-gpios: gpio for USB VBUS pin.
+  see gpio/gpio.txt.
+- vbus-supply: reference to the VBUS regulator, needed when supports
+  dual-role mode.

I think this needs some text that there can be either a vbus-gpio or
a vbus-supply. Oh wait reading:

https://patchwork.kernel.org/patch/10819377/

I see that this GPIO is for detecting vbus presence, not for driving/enabling
5v to Vbus from the board, that needs to be described more clearly.

+- pinctrl-names : a pinctrl state named "default" is optional
+- pinctrl-0 : pin control group
+  see pinctrl/pinctrl-bindings.txt
+
  Optional properties for usb-c-connector:
  - power-role: should be one of "source", "sink" or "dual"(DRP) if typec
    connector has power support.



Regards,

Hans



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux