Re: [PATCH v3 4/4] arm64: dts: ti: Add support for J784S4 EVM board

From: Tony Lindgren <tony@atomide.com>
To: Andrew Davis <afd@ti.com>
Cc: Nishanth Menon <nm@ti.com>, Apurva Nandan <a-nandan@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
	Hari Nagalla <hnagalla@ti.com>
Subject: Re: [PATCH v3 4/4] arm64: dts: ti: Add support for J784S4 EVM board
Date: Tue, 22 Nov 2022 09:51:12 +0200	[thread overview]
Message-ID: <Y3x/cGYWLLB+J2zU@atomide.com> (raw)
In-Reply-To: <3d5e41f6-16a8-4298-ccd3-6db60f94eb47@ti.com>

* Andrew Davis <afd@ti.com> [221118 21:05]:
> Why do we need SERIAL_8250_NR_UARTS at all, might be a better question.
> These should be dynamically allocated if the number goes over the
> default count imposed by the TTY framework. Maybe folks are still a
> bit too afraid to touch the TTY subsystem core, I don't blame them..

The 8250 core preallocates a number of ports for use, see
serial8250_isa_init_ports() and serial8250_register_8250_port(). As the
serial port driver probes, the preallocated ports get re-assigned to
the port driver.

Maybe we could keep the static serial8250_ports[] and add those ports
to a list where also the dynamically allocated ports would go..

Regards,

Tony