Re: [PATCH] serial: Add CONSOLE_POLL support for uartlite

[Peter Korsgaard <jacmet@sunsite.dk>]

>>>>> "Michal" == Michal Simek <monstr@monstr.eu> writes:

 Michal> CONSOLE_POLL support for uartlite enables
 Michal> KGDB debugging over serial line.

Please CC me on uartlite patches in the future, thanks.

 Michal> Signed-off-by: Michal Simek <monstr@monstr.eu>
 Michal> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
 Michal> ---
 Michal>  drivers/serial/uartlite.c |   26 +++++++++++++++++++++++++-
 Michal>  1 files changed, 25 insertions(+), 1 deletions(-)

 Michal> diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
 Michal> index 9b03d7b..c0fae0d 100644
 Michal> --- a/drivers/serial/uartlite.c
 Michal> +++ b/drivers/serial/uartlite.c
 Michal> @@ -322,6 +322,26 @@ static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser)
 Michal>  	return -EINVAL;
 Michal>  }
 
 Michal> +#ifdef CONFIG_CONSOLE_POLL
 Michal> +static int ulite_get_poll_char(struct uart_port *port)
 Michal> +{
 Michal> +	while (!(ioread32be(port->membase + ULITE_STATUS)
 Michal> +						& ULITE_STATUS_RXVALID))
 Michal> +		return NO_POLL_CHAR;
 Michal> +

Using while instead of 'if' is imho pretty obscure here.

 Michal> +	return ioread32be(port->membase + ULITE_RX);
 Michal> +}
 Michal> +
 Michal> +static void ulite_put_poll_char(struct uart_port *port, unsigned char ch)
 Michal> +{
 Michal> +	while (ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_TXFULL)
 Michal> +		cpu_relax();


You could reuse ulite_console_wait_tx() like ulite_console_putchar()
does.

Otherwise it looks fine.

Acked-by: Peter Korsgaard <jacmet@sunsite.dk>

-- 
Bye, Peter Korsgaard