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From: Kevin Hilman <khilman@baylibre.com>
To: linux-serial@vger.kernel.org
Cc: Neil Armstrong <narmstrong@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:ARM/Amlogic Meson SoC support"
	<linux-amlogic@lists.infradead.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	"moderated list:ARM/Amlogic Meson SoC support"
	<linux-arm-kernel@lists.infradead.org>,
	Jerome Brunet <jbrunet@baylibre.com>
Subject: [PATCH] tty: serial: meson: enable console as module
Date: Thu, 10 Dec 2020 16:57:44 -0800	[thread overview]
Message-ID: <20201211005744.12855-1-khilman@baylibre.com> (raw)

Enable serial driver to be built as a module.  To do so, init the
console support on driver/module load instead of using
console_initcall().

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
---
Yes, I'm well aware that having the serial console as a module makes
devices hard to debug, so I'm not changing any default behavior.  The
goal is just to enable building as a module for environments where
serial debug is not available or needed.

 drivers/tty/serial/Kconfig      | 2 +-
 drivers/tty/serial/meson_uart.c | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 1044fc387691..c3fa78e63357 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -206,7 +206,7 @@ config SERIAL_MESON
 
 config SERIAL_MESON_CONSOLE
 	bool "Support for console on meson"
-	depends on SERIAL_MESON=y
+	depends on SERIAL_MESON
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
 	help
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index d2c08b760f83..69eeef9edfa5 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -604,7 +604,6 @@ static int __init meson_serial_console_init(void)
 	register_console(&meson_serial_console);
 	return 0;
 }
-console_initcall(meson_serial_console_init);
 
 static void meson_serial_early_console_write(struct console *co,
 					     const char *s,
@@ -634,6 +633,9 @@ OF_EARLYCON_DECLARE(meson, "amlogic,meson-ao-uart",
 
 #define MESON_SERIAL_CONSOLE	(&meson_serial_console)
 #else
+static int __init meson_serial_console_init(void) {
+	return 0;
+}
 #define MESON_SERIAL_CONSOLE	NULL
 #endif
 
@@ -824,6 +826,10 @@ static int __init meson_uart_init(void)
 {
 	int ret;
 
+	ret = meson_serial_console_init();
+	if (ret)
+		return ret;
+	
 	ret = uart_register_driver(&meson_uart_driver);
 	if (ret)
 		return ret;
-- 
2.29.2


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             reply	other threads:[~2020-12-11  0:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-11  0:57 Kevin Hilman [this message]
2020-12-11  7:35 ` Greg Kroah-Hartman

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