Hi Heikki, On 21 June 2022 08:23 Heikki Krogerus wrote: > On Mon, Jun 20, 2022 at 09:04:10AM +0000, Phil Edworthy wrote: > > Hi Heikki, > > > > I have a board that uses the TI HD3SS3220 USB Type-C DRP port > > controller [1], however it doesn't have the interrupt line > > connected. How would you recommend I handle this? Should I get > > the driver to poll the i2c registers? > > > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/typec/hd3ss3220.c?h=v5.19-rc3 > > If you have some other way of detecting connections on your system, > then we probable could consider some kind of notifier, but as a > general solution for the lack of interrupt, I think polling is the > only way. Thanks for your comments. I wonder if this is a problem that affects quite a few drivers, where a generic polling solution can be used instead of interrupts. This would require a driver-specific function that can detect when an interrupt would have occurred, e.g. by reading a register via i2c. This is already done like that for ethernet PHY interrupts. > I'll add the list, and Aswath and Roger. Aswath and Roger were looking > at the same problem with the tps6598x (tipd) driver. Thanks Phil
