diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2011-12-06 15:16:34 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 19:05:33 -0800 |
| commit | dc8f3703e733f4f48553076c8615aeb004351662 (patch) | |
| tree | 0fac564b4e80ab5dd5007a93673513c9dca1d55d /drivers/tty/serial/bfin_sport_uart.c | |
| parent | 07143eaefd025098089edee7047714f6604a4a21 (diff) | |
| download | linux-dc8f3703e733f4f48553076c8615aeb004351662.tar.bz2 | |
serial: bfin-sport-uart: Request CTS GPIO PIN when the sport emulated serial device starts up.
This patch is similar to that for bfin-uart hardware flow control.
Sport emulated serial device may be probed earlier before GPIOLIB is initialized.
Requesting and configuring CTS GPIO PIN fails in that early stage.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/serial/bfin_sport_uart.c')
| -rw-r--r-- | drivers/tty/serial/bfin_sport_uart.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c index ee101c0d358f..f6505264ad45 100644 --- a/drivers/tty/serial/bfin_sport_uart.c +++ b/drivers/tty/serial/bfin_sport_uart.c @@ -299,8 +299,13 @@ static int sport_startup(struct uart_port *port) dev_info(port->dev, "Unable to attach BlackFin UART over SPORT CTS interrupt. So, disable it.\n"); } } - if (up->rts_pin >= 0) - gpio_direction_output(up->rts_pin, 0); + if (up->rts_pin >= 0) { + if (gpio_request(up->rts_pin, DRV_NAME)) { + dev_info(port->dev, "fail to request RTS PIN at GPIO_%d\n", up->rts_pin); + up->rts_pin = -1; + } else + gpio_direction_output(up->rts_pin, 0); + } #endif return 0; @@ -445,6 +450,8 @@ static void sport_shutdown(struct uart_port *port) #ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS if (up->cts_pin >= 0) free_irq(gpio_to_irq(up->cts_pin), up); + if (up->rts_pin >= 0) + gpio_free(up->rts_pin); #endif } @@ -811,9 +818,6 @@ static int __devinit sport_uart_probe(struct platform_device *pdev) sport->rts_pin = -1; else sport->rts_pin = res->start; - - if (sport->rts_pin >= 0) - gpio_request(sport->rts_pin, DRV_NAME); #endif } @@ -853,10 +857,6 @@ static int __devexit sport_uart_remove(struct platform_device *pdev) if (sport) { uart_remove_one_port(&sport_uart_reg, &sport->port); -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (sport->rts_pin >= 0) - gpio_free(sport->rts_pin); -#endif iounmap(sport->port.membase); peripheral_free_list( (unsigned short *)pdev->dev.platform_data); |