Hi Biju, On 21 June 2022 09:40 Biju Das wrote: > > 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/t > > > > ree/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. > > You mean like PHY at subsystem level, check IRQ is present in dt or not?, > if present use IRQ otherwise > Use polling. Indeed, but something that could be used for _all_ i2c devices. Thanks Phil
