On Sun, Aug 06, 2023 at 12:20:11PM +0200, Greg Kroah-Hartman wrote: > On Sun, Aug 06, 2023 at 05:20:54PM +0800, Jisheng Zhang wrote: > > When there's no irq(this can be due to various reasons, for example, > > no irq from HW support, or we just want to use poll solution, and so > > on), falling back to poll is still better than no support at all. > > Ouch, really? Why not just fix the hardware instead? > Hi Greg, The HW may be designed as that to save interrupt lines if the uart is dedicated to debug purpose. I also see similar support in other uart drivers, for example liteuart.c, altera_uart.c, altera_jtaguart.c 8250_ioc3.c and so on. Thanks
