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

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Message-Id: <20221112212125.448824-11-gsomlo@gmail.com>
Date:   Sat, 12 Nov 2022 16:21:21 -0500
From:   Gabriel Somlo <gsomlo@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-serial@...r.kernel.org, gregkh@...uxfoundation.org,
        jirislaby@...nel.org, kgugala@...micro.com, mholenko@...micro.com,
        joel@....id.au, david.abdurachmanov@...il.com,
        florent@...oy-digital.fr, geert@...ux-m68k.org
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 <gsomlo@...il.com>
---
 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