Messages in this thread | | | Date | Sun, 6 Aug 2023 18:16:23 +0800 | From | Jisheng Zhang <> | Subject | Re: [PATCH v2 0/2] serial: 8250_dw: fall back to poll if there's no interrupt |
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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
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