Re: [PATCH v3 2/2] Doc: ABI: add usb charger uevent

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On Tue, Jan 14, 2020 at 05:38:58PM +0800, Peter Chen wrote:
> When the USB charger is inserted or removed, the users could get
> USB charger state and type through the uevent.
> 
> Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
> ---
> Changes for v3:
> - Change kernel version for 5.6, and delete the kernel printk time
> 
>  Documentation/ABI/testing/usb-charger-uevent | 45 ++++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/ABI/testing/usb-charger-uevent
> 
> diff --git a/Documentation/ABI/testing/usb-charger-uevent b/Documentation/ABI/testing/usb-charger-uevent
> new file mode 100644
> index 000000000000..94ab16768e49
> --- /dev/null
> +++ b/Documentation/ABI/testing/usb-charger-uevent
> @@ -0,0 +1,45 @@
> +What:		Raise a uevent when a USB charger is inserted or removed
> +Date:		2020-01-14
> +KernelVersion:	5.6
> +Contact:	linux-usb@xxxxxxxxxxxxxxx
> +Description:	There are two USB charger states:
> +		USB_CHARGER_ABSENT
> +		USB_CHARGER_PRESENT
> +		There are five USB charger types:
> +		USB_CHARGER_UNKNOWN_TYPE
> +		USB_CHARGER_SDP_TYPE
> +		USB_CHARGER_CDP_TYPE
> +		USB_CHARGER_DCP_TYPE
> +		USB_CHARGER_ACA_TYPE

Any explaination for what these different types really are?  What is a
"CDP"?  "ACA"?  where would one find that information out?

thanks,

greg k-h



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