On Wed, Jan 08, 2020 at 02:26:10PM -0300, Paul Cercueil wrote: > Hi Greg, > > > Le mer., janv. 8, 2020 at 17:53, Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> a écrit : > > On Tue, Jan 07, 2020 at 01:29:01AM +0100, Paul Cercueil wrote: > > > Register a power supply charger, whose online state depends on > > > whether > > > the USB role is set to device or not. > > > > That says _what_ you are doing, but I have no idea _why_ you want to do > > this. > > > > What is this going to cause to have happen? What new userspace api is > > going to result? What will a user do with this? > > This is useful when the USB role is the only way to know if the device is > charging from USB. > > The API is the standard power supply charger API, you get a > /sys/class/power_supply/xxx/online node which tells you the state of the > charger. > > The sole purpose of this is to give userspace applications a way to know > whether or not the charger is plugged. Ok, this is all good info that should go into the changelog text for when you resend this. > > Is this going to always show up, no matter if the role is not even > > relevant for a power supply? > > I guess it'd always show up, yes. In which case would the role not be > relevant for a power supply? Is gpio-b-connector not always used for OTG > connectors? I do not know, I thought OTG was dead :) thanks, greg k-h
