linux-kernel - Re: [PATCH 3/3] tty: serial: samsung: Remove unused artpec-8 specific code

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Message-ID: <CAMuHMdVe-FULHWk3QCBENG7TsbEZyxj0N5shhESxWBWd49JmOw@mail.gmail.com>
Date: Thu, 11 Sep 2025 16:27:16 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Ravi Patel <ravi.patel@...sung.com>
Cc: gregkh@...uxfoundation.org, jirislaby@...nel.org, robh@...nel.org, 
	krzk+dt@...nel.org, conor+dt@...nel.org, jesper.nilsson@...s.com, 
	lars.persson@...s.com, alim.akhtar@...sung.com, arnd@...nel.org, 
	krzk@...nel.org, andriy.shevchenko@...ux.intel.com, geert+renesas@...der.be, 
	thierry.bultel.yh@...renesas.com, dianders@...omium.org, 
	robert.marko@...tura.hr, schnelle@...ux.ibm.com, kkartik@...dia.com, 
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-samsung-soc@...r.kernel.org, linux-arm-kernel@...s.com, 
	ksk4725@...sia.com, kenkim@...sia.com, smn1196@...sia.com, 
	pjsin865@...sia.com, shradha.t@...sung.com
Subject: Re: [PATCH 3/3] tty: serial: samsung: Remove unused artpec-8 specific code

Hi Ravi,

On Thu, 11 Sept 2025 at 16:17, Ravi Patel <ravi.patel@...sung.com> wrote:
> Since ARTPEC-8 is using exynos8895 driver data, remove the unused
> artpec-8 specific driver data.
>
> ARTPEC-8 is using exynos4210 for earlycon, so earlycon code
> for ARTPEC-8 is also not required.
>
> Signed-off-by: Ravi Patel <ravi.patel@...sung.com>

Thanks for your patch!

> --- a/drivers/tty/serial/samsung_tty.c
> +++ b/drivers/tty/serial/samsung_tty.c

> @@ -2655,8 +2621,6 @@ static const struct of_device_id s3c24xx_uart_dt_match[] = {
>                 .data = S5L_SERIAL_DRV_DATA },
>         { .compatible = "samsung,exynos850-uart",
>                 .data = EXYNOS850_SERIAL_DRV_DATA },
> -       { .compatible = "axis,artpec8-uart",
> -               .data = ARTPEC8_SERIAL_DRV_DATA },
>         { .compatible = "google,gs101-uart",
>                 .data = GS101_SERIAL_DRV_DATA },
>         { .compatible = "samsung,exynos8895-uart",
> @@ -2828,8 +2792,6 @@ OF_EARLYCON_DECLARE(s5pv210, "samsung,s5pv210-uart",
>                         s5pv210_early_console_setup);
>  OF_EARLYCON_DECLARE(exynos4210, "samsung,exynos4210-uart",
>                         s5pv210_early_console_setup);
> -OF_EARLYCON_DECLARE(artpec8, "axis,artpec8-uart",
> -                       s5pv210_early_console_setup);
>
>  static int __init gs101_early_console_setup(struct earlycon_device *device,
>                                             const char *opt)

Removing these breaks backwards-compatibility with existing DTBs,
which lack the new "samsung,exynos8895-uart" fallback compatible value.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds