linux-kernel - Re: [RFC PATCH 0/4] USB Power Delivery character device interface

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Date:   Tue, 26 Oct 2021 17:06:28 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...gle.com>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Badhri Jagan Sridharan <badhri@...gle.com>,
        Jack Pham <jackp@...eaurora.org>,
        "Gopal, Saranya" <saranya.gopal@...el.com>,
        "Regupathy, Rajaram" <rajaram.regupathy@...el.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 0/4] USB Power Delivery character device interface

On Tue, Oct 26, 2021 at 05:33:48PM +0300, Heikki Krogerus wrote:
> Hi,
> 
> This is the proposal for USB PD character devices that we could use to
> communicate USB PD messages directly with the USB PD capable partners,
> ports and cable plugs from user space. Originally I proposed this idea
> here as a better way to get the PDOs from the partners (and ports and
> plugs): https://lkml.org/lkml/2021/10/8/331

You should put the info there (and please use lore.kernel.org in the
future, not lkml.org as we have no control over that site), into this
0/X message as I have no idea _why_ you need a char device and why the
sysfs interface will not work.

So, why not sysfs?  :)

thanks,

greg k-h