diff options
| author | Albin Tonnerre <albin.tonnerre@free-electrons.com> | 2009-12-09 12:31:32 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 14:43:08 -0800 |
| commit | 8fe2d54145a51238308d333f9dc57c5df575ff78 (patch) | |
| tree | aa56ae07170eab350ade6f8a59a303a10a2dc337 /drivers/serial | |
| parent | 8b505ca8e2600eb9e7dd2d6b2682a81717671374 (diff) | |
serial: atmel_serial: add poll_get_char and poll_put_char uart_ops
Permits using KGDB over the console with the atmel_serial driver.
[akpm@linux-foundation.org: s/barrier/cpu_relax/]
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/atmel_serial.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 9d948bccafa..2c9bf9b6832 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -1213,6 +1213,24 @@ static int atmel_verify_port(struct uart_port *port, struct serial_struct *ser) return ret; } +#ifdef CONFIG_CONSOLE_POLL +static int atmel_poll_get_char(struct uart_port *port) +{ + while (!(UART_GET_CSR(port) & ATMEL_US_RXRDY)) + cpu_relax(); + + return UART_GET_CHAR(port); +} + +static void atmel_poll_put_char(struct uart_port *port, unsigned char ch) +{ + while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY)) + cpu_relax(); + + UART_PUT_CHAR(port, ch); +} +#endif + static struct uart_ops atmel_pops = { .tx_empty = atmel_tx_empty, .set_mctrl = atmel_set_mctrl, @@ -1232,6 +1250,10 @@ static struct uart_ops atmel_pops = { .config_port = atmel_config_port, .verify_port = atmel_verify_port, .pm = atmel_serial_pm, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = atmel_poll_get_char, + .poll_put_char = atmel_poll_put_char, +#endif }; /* |