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Message-ID: <ZOMlJAKfQC8W6OkE@smile.fi.intel.com>
Date: Mon, 21 Aug 2023 11:49:40 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Justin Chen <justin.chen@...adcom.com>
Cc: linux-serial@...r.kernel.org, Al Cooper <alcooperx@...il.com>,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@...adcom.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
Florian Fainelli <f.fainelli@...il.com>,
John Ogness <john.ogness@...utronix.de>,
Jiaqing Zhao <jiaqing.zhao@...ux.intel.com>,
"open list:TTY LAYER" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] serial: 8250_bcm7271: improve bcm7271 8250 port
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
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