On Mon, Jul 27, 2020 at 01:50:26PM +0200, Mike Looijmans wrote: > > Met vriendelijke groet / kind regards, > > Mike Looijmans > System Expert You probably want to remove your signature when replying to the list... > On 27-07-2020 12:23, Mark Brown wrote: > > On Sun, Jul 26, 2020 at 09:10:39AM +0200, Mike Looijmans wrote: > > > It's the 5V VBUS power for the USB "plug" that's being controlled here. It > > > must turned on when the controller is in "host" mode. Some boards arrange > > > this in hardware through the PHY, and some just don't have any control at > > > all and have it permanently on or off. On a board where the 5V is controlled > > > using a GPIO line or an I2C chip, this patch is required to make it work. > > That sounds like the driver should not be using _get_optional() then. > Making it mandatory would break most (read: all except Topic's) existing > boards as they won't have it in their devicetree. I'm perfectly okay with > that, but others might disagree. No, it wouldn't break them at all - they'd get a dummy regulator provided.
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