Add changes so Lantiq serial driver can be compiled as a module. Also, make this driver's use as console selectable/configurable.
Signed-off-by: Rahul Tanwar <[email protected]> --- drivers/tty/serial/Kconfig | 13 +++++++++++-- drivers/tty/serial/lantiq.c | 43 ++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 51 insertions(+), 5 deletions(-) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 4b0a7b98f8c7..996782247174 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1034,13 +1034,22 @@ config SERIAL_SIFIVE_CONSOLE boot time.) config SERIAL_LANTIQ - bool "Lantiq serial driver" + tristate "Lantiq serial driver" depends on (LANTIQ || X86) || COMPILE_TEST select SERIAL_CORE + help + Support for UART on Lantiq and Intel SoCs. + To compile this driver as a module, choose M here, the + module will be called lantiq. + +config SERIAL_LANTIQ_CONSOLE + bool "Console on Lantiq UART" + depends on SERIAL_LANTIQ=y select SERIAL_CORE_CONSOLE select SERIAL_EARLYCON help - Support for console and UART on Lantiq SoCs. + Select this option if you would like to use a Lantiq UART as the + system console. config SERIAL_QE tristate "Freescale QUICC Engine serial port support" diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index c5e46ff972e4..93ed59bccd11 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -15,6 +15,7 @@ #include <linux/io.h> #include <linux/ioport.h> #include <linux/lantiq.h> +#include <linux/module.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> @@ -597,6 +598,13 @@ static const struct uart_ops lqasc_pops = { .verify_port = lqasc_verify_port, }; + +/* + * Linux console interface + */ + +#ifdef CONFIG_SERIAL_LANTIQ_CONSOLE + static void lqasc_console_putchar(struct uart_port *port, int ch) { @@ -705,6 +713,14 @@ lqasc_serial_early_console_setup(struct earlycon_device *device, OF_EARLYCON_DECLARE(lantiq, "lantiq,asc", lqasc_serial_early_console_setup); OF_EARLYCON_DECLARE(lantiq, "intel,lgm-asc", lqasc_serial_early_console_setup); +#define LANTIQ_SERIAL_CONSOLE (&lqasc_console) + +#else + +#define LANTIQ_SERIAL_CONSOLE NULL + +#endif + static struct uart_driver lqasc_reg = { .owner = THIS_MODULE, .driver_name = DRVNAME, @@ -712,7 +728,7 @@ static struct uart_driver lqasc_reg = { .major = 0, .minor = 0, .nr = MAXPORTS, - .cons = &lqasc_console, + .cons = LANTIQ_SERIAL_CONSOLE, }; static int fetch_irq_lantiq(struct device *dev, struct ltq_uart_port *ltq_port) @@ -899,6 +915,13 @@ lqasc_probe(struct platform_device *pdev) return ret; } +static int lqasc_remove(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + + return uart_remove_one_port(&lqasc_reg, port); +} + static const struct ltq_soc_data soc_data_lantiq = { .fetch_irq = fetch_irq_lantiq, .request_irq = request_irq_lantiq, @@ -916,8 +939,11 @@ static const struct of_device_id ltq_asc_match[] = { { .compatible = "intel,lgm-asc", .data = &soc_data_intel }, {}, }; +MODULE_DEVICE_TABLE(of, ltq_asc_match); static struct platform_driver lqasc_driver = { + .probe = lqasc_probe, + .remove = lqasc_remove, .driver = { .name = DRVNAME, .of_match_table = ltq_asc_match, @@ -933,10 +959,21 @@ init_lqasc(void) if (ret != 0) return ret; - ret = platform_driver_probe(&lqasc_driver, lqasc_probe); + ret = platform_driver_register(&lqasc_driver); if (ret != 0) uart_unregister_driver(&lqasc_reg); return ret; } -device_initcall(init_lqasc); + +static void __exit exit_lqasc(void) +{ + platform_driver_unregister(&lqasc_driver); + uart_unregister_driver(&lqasc_reg); +} + +module_init(init_lqasc); +module_exit(exit_lqasc); + +MODULE_DESCRIPTION("Serial driver for Lantiq & Intel gateway SoCs"); +MODULE_LICENSE("GPL v2"); -- 2.11.0
