From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Valentin Caron <valentin.caron@foss.st.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Corbet <corbet@lwn.net>,
Jiri Slaby <jirislaby@kernel.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Erwan Le Ray <erwan.leray@foss.st.com>,
"open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
linux-stm32@st-md-mailman.stormreply.com,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>
Subject: Re: [PATCH V2 3/3] serial: stm32: add earlycon support
Date: Mon, 11 Apr 2022 16:59:13 +0200 [thread overview]
Message-ID: <CAMuHMdWD8fxeqPUaT_CwnYdq02aaTsnQM_G-YyOGWooS5epCeQ@mail.gmail.com> (raw)
In-Reply-To: <20220408122636.505737-4-valentin.caron@foss.st.com>
Hi Valentin,
On Fri, Apr 8, 2022 at 3:14 PM Valentin Caron
<valentin.caron@foss.st.com> wrote:
> Add early console support in stm32 uart driver.
>
> Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
> Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Thanks for your patch!
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1264,6 +1264,12 @@
> address must be provided, and the serial port must
> already be setup and configured.
>
> + stm32,<addr>
> + Use early console provided by ST Microelectronics
> + serial driver for STM32 SoCs. A valid base address
> + must be provided, and the serial port must already
> + be setup and configured.
Why do you need this parameter?
Given this driver uses DT, can't it figure out the serial port address
from chosen/stdout-path?
+OF_EARLYCON_DECLARE(stm32, "st,stm32h7-uart", early_stm32_h7_serial_setup);
+OF_EARLYCON_DECLARE(stm32, "st,stm32f7-uart", early_stm32_f7_serial_setup);
+OF_EARLYCON_DECLARE(stm32, "st,stm32-uart", early_stm32_f4_serial_setup);
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
next prev parent reply other threads:[~2022-04-11 14:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-08 12:26 [PATCH V2 0/3] serial: stm32: add earlycon and polling mode Valentin Caron
2022-04-08 12:26 ` [PATCH V2 1/3] serial: stm32: remove infinite loop possibility in putchar function Valentin Caron
2022-04-08 12:26 ` [PATCH V2 2/3] serial: stm32: add KGDB support Valentin Caron
2022-04-08 12:26 ` [PATCH V2 3/3] serial: stm32: add earlycon support Valentin Caron
2022-04-11 14:59 ` Geert Uytterhoeven [this message]
2022-04-14 12:17 ` Valentin CARON
2022-04-14 12:24 ` Geert Uytterhoeven
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