Re: [PATCH v3] serial: 8250_bcm7271: improve bcm7271 8250 port

From: Andy Shevchenko
Date: Mon Aug 21 2023 - 04:49:52 EST


On Fri, Aug 18, 2023 at 02:26:08PM -0700, Justin Chen wrote:
> The 8250 BCM7271 UART is not a direct match to PORT_16550A and other
> generic ports do not match its hardware capabilities. PORT_ALTR matches
> the rx trigger levels, but its vendor configurations are not compatible.
> Unfortunately this means we need to create another port to fully capture
> the hardware capabilities of the BCM7271 UART.
>
> To alleviate some latency pressures, we default the rx trigger level to 8.

...

> v3
> - Switch PORT_BCM7271 to 13

This was very bad suggestion, sorry. You need to use another gap.

So, that seventy something was good enough.


--
With Best Regards,
Andy Shevchenko