linux-kernel - Re: [RFC PATCH v2 6/7] typec: tcpm: Represent source supply through power

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Message-ID: <20171127133852.GB2403@kuha.fi.intel.com>
Date:   Mon, 27 Nov 2017 15:38:52 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sebastian Reichel <sre@...nel.org>,
        Yueyao Zhu <yueyao.zhu@...il.com>,
        Rui Miguel Silva <rmfrfs@...il.com>,
        linux-usb@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, support.opensource@...semi.com
Subject: Re: [RFC PATCH v2 6/7] typec: tcpm: Represent source supply through
 power_supply class

On Sat, Nov 25, 2017 at 03:03:02PM +0100, Hans de Goede wrote:
> > Is it OK to everybody that the type of the psy is changed like that?
> > Hans?!
> > 
> > We do have drivers that already change the type, for example
> > drivers/power/supply/isp1704_charger.c, but what does the user space
> > expect? The ABI for the power supply class was never documented I
> > guess.
> 
> The main userspace consumer of the power_supply sysfs class is upower,
> upower knows about 3 types: "Mains", "Battery" and "USB", anything
> else it gives a type of UP_DEVICE_KIND_UNKNOWN. So POWER_SUPPLY_TYPE_USB_TYPE_C
> vs POWER_SUPPLY_TYPE_USB_PD_PPS does matter to it.

OK.

Thanks Hans,

-- 
heikki