linux-kernel - Re: [PATCH 05/13] tty: serial: samsung: add gs101 earlycon support

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Date:   Thu, 14 Dec 2023 13:01:21 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Tudor Ambarus" <tudor.ambarus@...aro.org>,
        "Peter Griffin" <peter.griffin@...aro.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        krzysztof.kozlowski+dt@...aro.org,
        "Michael Turquette" <mturquette@...libre.com>,
        "Stephen Boyd" <sboyd@...nel.org>,
        "Conor Dooley" <conor+dt@...nel.org>, andi.shyti@...nel.org,
        "Alim Akhtar" <alim.akhtar@...sung.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Jiri Slaby" <jirislaby@...nel.org>,
        "Catalin Marinas" <catalin.marinas@....com>,
        "Will Deacon" <will@...nel.org>,
        "Sylwester Nawrocki" <s.nawrocki@...sung.com>,
        "Tomasz Figa" <tomasz.figa@...il.com>,
        "Chanwoo Choi" <cw00.choi@...sung.com>,
        "Sam Protsenko" <semen.protsenko@...aro.org>
Cc:     André Draszik <andre.draszik@...aro.org>,
        saravanak@...gle.com, "William McVicker" <willmcvicker@...gle.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 05/13] tty: serial: samsung: add gs101 earlycon support

On Thu, Dec 14, 2023, at 11:52, Tudor Ambarus wrote:
> +static int __init gs101_early_console_setup(struct earlycon_device *device,
> +					    const char *opt)
> +{
> +	/* gs101 always expects MMIO32 register accesses. */
> +	device->port.iotype = UPIO_MEM32;
> +
> +	return s5pv210_early_console_setup(device, opt);
> +}
> +
> +OF_EARLYCON_DECLARE(gs101, "google,gs101-uart", gs101_early_console_setup);

It looks like this is already done by of_setup_earlycon() based on
the reg-io-width property. Any idea why it doesn't work with the
normal s5pv210_early_console_setup() function?

      Arnd