diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/st-asc.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c index a3165842ca29..f9dcf86a1546 100644 --- a/drivers/tty/serial/st-asc.c +++ b/drivers/tty/serial/st-asc.c @@ -30,6 +30,7 @@ #include <linux/of_platform.h> #include <linux/serial_core.h> #include <linux/clk.h> +#include <linux/kgdb.h> #define DRIVER_NAME "st-asc" #define ASC_SERIAL_NAME "ttyAS" @@ -615,6 +616,25 @@ asc_verify_port(struct uart_port *port, struct serial_struct *ser) } #ifdef CONFIG_CONSOLE_POLL + +#ifdef CONFIG_KGDB_FIQ +/* + * Prepare the UART to be used from kgdb's NMI support. + */ +static int asc_poll_init(struct uart_port *port) +{ + struct asc_port *ascport = container_of(port, struct asc_port, port); + + /* register the FIQ with kgdb */ + kgdb_register_fiq(ascport->port.irq); + + /* enable RX interrupts in case the interrupt is used for NMI entry. */ + asc_enable_rx_interrupts(port); + + return 0; +} +#endif /* CONFIG_KGDB_FIQ */ + /* * Console polling routines for writing and reading from the uart while * in an interrupt or debug context (i.e. kgdb). @@ -657,6 +677,9 @@ static struct uart_ops asc_uart_ops = { .verify_port = asc_verify_port, .pm = asc_pm, #ifdef CONFIG_CONSOLE_POLL +#ifdef CONFIG_KGDB_FIQ + .poll_init = asc_poll_init, +#endif /* CONFIG_KGDB_FIQ */ .poll_get_char = asc_get_poll_char, .poll_put_char = asc_put_poll_char, #endif /* CONFIG_CONSOLE_POLL */ |