Re: [PATCH 5/8] tty: serial: samsung: Enable console as module
From: Krzysztof Kozlowski <hidden>
Date: 2021-11-29 08:54:23
Also in:
linux-arm-kernel, linux-i2c, linux-samsung-soc, linux-serial, linux-spi, lkml
On 27/11/2021 23:32, Sam Protsenko wrote:
quoted hunk ↗ jump to hunk
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 helpdiff --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;
This will trigger warns on module re-loading, won't it? Either suppress unbind or cleanup in module exit.
+
+ 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
/*Best regards, Krzysztof