2022-11-12 21:25:19

by Gabriel L. Somlo

Subject: [PATCH v3 10/14] serial: liteuart: separate rx loop from poll timer

Convert the rx loop into its own dedicated function, and (for now)
call it from the poll timer. This is in preparation for adding irq
support to the receive path.

Signed-off-by: Gabriel Somlo <[email protected]>
---
drivers/tty/serial/liteuart.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 974da0f73257..172ac190ba2f 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -67,10 +67,8 @@ static struct uart_driver liteuart_driver = {
#endif
};

-static void liteuart_timer(struct timer_list *t)
+static void liteuart_rx_chars(struct uart_port *port)
{
- struct liteuart_port *uart = from_timer(uart, t, timer);
- struct uart_port *port = &uart->port;
unsigned char __iomem *membase = port->membase;
unsigned int status, ch;

@@ -87,6 +85,14 @@ static void liteuart_timer(struct timer_list *t)
}

tty_flip_buffer_push(&port->state->port);
+}
+
+static void liteuart_timer(struct timer_list *t)
+{
+ struct liteuart_port *uart = from_timer(uart, t, timer);
+ struct uart_port *port = &uart->port;
+
+ liteuart_rx_chars(port);

mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
}
--
2.37.3

2022-11-15 16:45:08

by Ilpo Järvinen

Subject: Re: [PATCH v3 10/14] serial: liteuart: separate rx loop from poll timer

On Sat, 12 Nov 2022, Gabriel Somlo wrote:

> Convert the rx loop into its own dedicated function, and (for now)
> call it from the poll timer. This is in preparation for adding irq
> support to the receive path.
>
> Signed-off-by: Gabriel Somlo <[email protected]>
> ---
> drivers/tty/serial/liteuart.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
> index 974da0f73257..172ac190ba2f 100644
> --- a/drivers/tty/serial/liteuart.c
> +++ b/drivers/tty/serial/liteuart.c
> @@ -67,10 +67,8 @@ static struct uart_driver liteuart_driver = {
> #endif
> };
>
> -static void liteuart_timer(struct timer_list *t)
> +static void liteuart_rx_chars(struct uart_port *port)
> {
> - struct liteuart_port *uart = from_timer(uart, t, timer);
> - struct uart_port *port = &uart->port;
> unsigned char __iomem *membase = port->membase;
> unsigned int status, ch;
>
> @@ -87,6 +85,14 @@ static void liteuart_timer(struct timer_list *t)
> }
>
> tty_flip_buffer_push(&port->state->port);
> +}
> +
> +static void liteuart_timer(struct timer_list *t)
> +{
> + struct liteuart_port *uart = from_timer(uart, t, timer);
> + struct uart_port *port = &uart->port;
> +
> + liteuart_rx_chars(port);
>
> mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
> }

Reviewed-by: Ilpo J?rvinen <[email protected]>


--
i.