[PATCH 5/8] tty: serial: samsung: Enable console as module

Sam Protsenko
2021-11-27T22:39:00Z

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().

This is needed for proper support of USIv2 driver (which can be built as
a module, which in turn makes SERIAL_SAMSUNG be a module too). It also
might be useful for Android GKI modularization efforts.

Inspired by commit 87a0b9f98ac5 ("tty: serial: meson: enable console as
module").

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
drivers/tty/serial/Kconfig | 2 +-
drivers/tty/serial/samsung_tty.c | 21 +++++++++++++++++++--
2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index fc543ac97c13..0e5ccb25bdb1 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -263,7 +263,7 @@ config SERIAL_SAMSUNG_UARTS

config SERIAL_SAMSUNG_CONSOLE
bool "Support for console on Samsung SoC serial port"
- depends on SERIAL_SAMSUNG=y
+ depends on SERIAL_SAMSUNG
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
help
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index f986a9253dc8..92a63e9392ed 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -1720,10 +1720,10 @@ static int __init s3c24xx_serial_console_init(void)
register_console(&s3c24xx_serial_console);
return 0;
}
-console_initcall(s3c24xx_serial_console_init);

#define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console
#else
+static inline int s3c24xx_serial_console_init(void) { return 0; }
#define S3C24XX_SERIAL_CONSOLE NULL
#endif

@@ -2898,7 +2898,24 @@ static struct platform_driver samsung_serial_driver = {
},
};

-module_platform_driver(samsung_serial_driver);
+static int __init samsung_serial_init(void)
+{
+ int ret;
+
+ ret = s3c24xx_serial_console_init();
+ if (ret)
+ return ret;
+
+ return platform_driver_register(&samsung_serial_driver);
+}
+
+static void __exit samsung_serial_exit(void)
+{
+ platform_driver_unregister(&samsung_serial_driver);
+}
+
+module_init(samsung_serial_init);
+module_exit(samsung_serial_exit);

#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
/*
--
2.30.2