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From: Tony Lindgren <tony@atomide.com>
To: Francesco Dolcini <francesco@dolcini.it>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Tero Kristo <kristo@kernel.org>
Subject: Re: [PATCH] arm64: defconfig: increase SERIAL_8250_NR_UARTS
Date: Fri, 1 Dec 2023 08:03:46 +0200	[thread overview]
Message-ID: <20231201060346.GE5169@atomide.com> (raw)
In-Reply-To: <20231130231657.12715-1-francesco@dolcini.it>

* Francesco Dolcini <francesco@dolcini.it> [231130 23:17]:
> Increase CONFIG_SERIAL_8250_NR_UARTS from 4 to 8, the current legacy value
> is not adequate for embedded systems that use SoCs where it's common to
> have a large number of serial ports.
> 
> No need to change CONFIG_SERIAL_8250_RUNTIME_UARTS, see commit 9d86719f8769
> ("serial: 8250: Allow using ports higher than SERIAL_8250_RUNTIME_UARTS").
> 
> This enables using the UART connected Bluetooth device on Verdin AM62
> board.

OK makes sense for distro use.

Disabling unused ports leads into port names shifting, which we still can't
easily tolerate until we have the DEVNAME:0.0 style addressing available for
ports. So for now we still depend CONFIG_SERIAL_8250_NR_UARTS, eventually
that too should become just a legacy ISA port array.. Meanwhile:

Reviewed-by: Tony Lindgren <tony@atomide.com>

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WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Francesco Dolcini <francesco@dolcini.it>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Tero Kristo <kristo@kernel.org>
Subject: Re: [PATCH] arm64: defconfig: increase SERIAL_8250_NR_UARTS
Date: Fri, 1 Dec 2023 08:03:46 +0200	[thread overview]
Message-ID: <20231201060346.GE5169@atomide.com> (raw)
In-Reply-To: <20231130231657.12715-1-francesco@dolcini.it>

* Francesco Dolcini <francesco@dolcini.it> [231130 23:17]:
> Increase CONFIG_SERIAL_8250_NR_UARTS from 4 to 8, the current legacy value
> is not adequate for embedded systems that use SoCs where it's common to
> have a large number of serial ports.
> 
> No need to change CONFIG_SERIAL_8250_RUNTIME_UARTS, see commit 9d86719f8769
> ("serial: 8250: Allow using ports higher than SERIAL_8250_RUNTIME_UARTS").
> 
> This enables using the UART connected Bluetooth device on Verdin AM62
> board.

OK makes sense for distro use.

Disabling unused ports leads into port names shifting, which we still can't
easily tolerate until we have the DEVNAME:0.0 style addressing available for
ports. So for now we still depend CONFIG_SERIAL_8250_NR_UARTS, eventually
that too should become just a legacy ISA port array.. Meanwhile:

Reviewed-by: Tony Lindgren <tony@atomide.com>

  reply	other threads:[~2023-12-01  6:04 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-30 23:16 [PATCH] arm64: defconfig: increase SERIAL_8250_NR_UARTS Francesco Dolcini
2023-11-30 23:16 ` Francesco Dolcini
2023-12-01  6:03 ` Tony Lindgren [this message]
2023-12-01  6:03   ` Tony Lindgren
2023-12-01  6:49   ` Nishanth Menon
2023-12-01  6:49     ` Nishanth Menon
2023-12-01  8:48     ` Francesco Dolcini
2023-12-01  8:48       ` Francesco Dolcini
2023-12-01  8:59       ` Nishanth Menon
2023-12-01  8:59         ` Nishanth Menon
2023-12-01  9:18         ` Francesco Dolcini
2023-12-01  9:18           ` Francesco Dolcini
2023-12-01 15:31     ` Arnd Bergmann
2023-12-01 15:31       ` Arnd Bergmann
2023-12-01 16:31       ` Nishanth Menon
2023-12-01 16:31         ` Nishanth Menon

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