linux-kernel - [PATCH] tty: serial: samsung: Declare earlycon for Exynos850

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Message-ID: <20251118024822.28148-1-semen.protsenko@linaro.org>
Date: Mon, 17 Nov 2025 20:48:22 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: [PATCH] tty: serial: samsung: Declare earlycon for Exynos850

It makes it possible to use just "earlycon" param in kernel cmdline
on Exynos850 based boards instead of "earlycon=exynos4210,0x13820000",
as described in [1]:

    When used with no options, the early console is determined by
    stdout-path property in device tree's chosen node

[1] Documentation/admin-guide/kernel-parameters.txt

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
 drivers/tty/serial/samsung_tty.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 2fb58c626daf..c1fabad6ba1f 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -2830,6 +2830,8 @@ OF_EARLYCON_DECLARE(exynos4210, "samsung,exynos4210-uart",
 			s5pv210_early_console_setup);
 OF_EARLYCON_DECLARE(artpec8, "axis,artpec8-uart",
 			s5pv210_early_console_setup);
+OF_EARLYCON_DECLARE(exynos850, "samsung,exynos850-uart",
+			s5pv210_early_console_setup);
 
 static int __init gs101_early_console_setup(struct earlycon_device *device,
 					    const char *opt)

base-commit: e7c375b181600caf135cfd03eadbc45eb530f2cb
-- 
2.47.3