diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2013-08-28 19:08:39 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-29 03:00:42 +0400 |
| commit | 124155351331a53feb00d10874f0c620405fd385 (patch) | |
| tree | d07b24b0a57e132893704faa806c9472112d2822 /drivers/tty | |
| parent | 0710e5626f524a26fe5992adb91a6289b2139928 (diff) | |
| download | linux-124155351331a53feb00d10874f0c620405fd385.tar.xz | |
tty: ar933x_uart: use config_enabled() macro to clean up ifdefs
Add a new ar933x_uart_console_enabled() helper function
which uses the config_enable(CONFIG_SERIAL_AR933X_CONSOLE)
macro to decide if the console support is enabled or not.
Remove the 'ifdef CONFIG_SERIAL_AR933X_CONSOLE' statements
and use the new helper function to conditionally enable
console support instead.
If CONFIG_SERIAL_AR933X_CONSOLE is not enabled, the new
helper function will become a null stub which allows the
compiler to optimize out the unused console specific
functions/variables.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/ar933x_uart.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 2d83a45dcc8d..0437a9e08d58 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -50,6 +50,11 @@ struct ar933x_uart_port { struct clk *clk; }; +static inline bool ar933x_uart_console_enabled(void) +{ + return config_enabled(CONFIG_SERIAL_AR933X_CONSOLE); +} + static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up, int offset) { @@ -500,8 +505,6 @@ static struct uart_ops ar933x_uart_ops = { .verify_port = ar933x_uart_verify_port, }; -#ifdef CONFIG_SERIAL_AR933X_CONSOLE - static struct ar933x_uart_port * ar933x_console_ports[CONFIG_SERIAL_AR933X_NR_UARTS]; @@ -600,25 +603,18 @@ static struct console ar933x_uart_console = { static void ar933x_uart_add_console_port(struct ar933x_uart_port *up) { + if (!ar933x_uart_console_enabled()) + return; + ar933x_console_ports[up->port.line] = up; } -#define AR933X_SERIAL_CONSOLE (&ar933x_uart_console) - -#else - -static inline void ar933x_uart_add_console_port(struct ar933x_uart_port *up) {} - -#define AR933X_SERIAL_CONSOLE NULL - -#endif /* CONFIG_SERIAL_AR933X_CONSOLE */ - static struct uart_driver ar933x_uart_driver = { .owner = THIS_MODULE, .driver_name = DRIVER_NAME, .dev_name = "ttyATH", .nr = CONFIG_SERIAL_AR933X_NR_UARTS, - .cons = AR933X_SERIAL_CONSOLE, + .cons = NULL, /* filled in runtime */ }; static int ar933x_uart_probe(struct platform_device *pdev) @@ -730,6 +726,9 @@ static int __init ar933x_uart_init(void) { int ret; + if (ar933x_uart_console_enabled()) + ar933x_uart_driver.cons = &ar933x_uart_console; + ret = uart_register_driver(&ar933x_uart_driver); if (ret) goto err_out; |