Hi Wolfram, I don't think that it's possible to use the generic vbus-supply. In my case the complete chip, not only the bus, is powered by a regulator. In addition it looks like this works only for platform drivers where you can set the bus_regulator before the i2c core probe function is invoked. Regards, Patrick Rudolph On Wed, Jan 12, 2022 at 10:31 AM Wolfram Sang <wsa@xxxxxxxxxx> wrote: > > On Sat, Jan 08, 2022 at 07:57:58PM +0100, Patrick Rudolph wrote: > > Add an optional vdd regulator and enable it when found for devices > > that are powered off by default. > > > > Signed-off-by: Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx> > > regulator support was recently added to the I2C core but had to be > reverted because of side effects [1]. I think you could make use of it > if it gets readded? > > [1] a19f75de73c2 ("Revert "i2c: core: support bus regulator controlling in adapter"") >