linux-kernel - [PATCH v6 11/14] serial: liteuart: move function definitions

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Date:   Wed, 23 Nov 2022 08:04:57 -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,
        ilpo.jarvinen@...ux.intel.com
Subject: [PATCH v6 11/14] serial: liteuart: move function definitions

Move definitions for liteuart_[stop|start]_tx(), liteuart_stop_rx(),
and liteuart_putchar() to a more convenient location in preparation
for adding IRQ support. This patch contains no functional changes.

Signed-off-by: Gabriel Somlo <gsomlo@...il.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 drivers/tty/serial/liteuart.c | 82 +++++++++++++++++------------------
 1 file changed, 41 insertions(+), 41 deletions(-)

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index ab6837f3e40d..0b9d96e5efcf 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -68,6 +68,47 @@ static struct uart_driver liteuart_driver = {
 #endif
 };
 
+static void liteuart_putchar(struct uart_port *port, unsigned char ch)
+{
+	while (litex_read8(port->membase + OFF_TXFULL))
+		cpu_relax();
+
+	litex_write8(port->membase + OFF_RXTX, ch);
+}
+
+static void liteuart_stop_tx(struct uart_port *port)
+{
+}
+
+static void liteuart_start_tx(struct uart_port *port)
+{
+	struct circ_buf *xmit = &port->state->xmit;
+	unsigned char ch;
+
+	if (unlikely(port->x_char)) {
+		litex_write8(port->membase + OFF_RXTX, port->x_char);
+		port->icount.tx++;
+		port->x_char = 0;
+	} else if (!uart_circ_empty(xmit)) {
+		while (xmit->head != xmit->tail) {
+			ch = xmit->buf[xmit->tail];
+			uart_xmit_advance(port, 1);
+			liteuart_putchar(port, ch);
+		}
+	}
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+}
+
+static void liteuart_stop_rx(struct uart_port *port)
+{
+	struct liteuart_port *uart = to_liteuart_port(port);
+
+	/* just delete timer */
+	del_timer(&uart->timer);
+}
+
 static void liteuart_rx_chars(struct uart_port *port)
 {
 	unsigned char __iomem *membase = port->membase;
@@ -98,14 +139,6 @@ static void liteuart_timer(struct timer_list *t)
 	mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
 }
 
-static void liteuart_putchar(struct uart_port *port, unsigned char ch)
-{
-	while (litex_read8(port->membase + OFF_TXFULL))
-		cpu_relax();
-
-	litex_write8(port->membase + OFF_RXTX, ch);
-}
-
 static unsigned int liteuart_tx_empty(struct uart_port *port)
 {
 	/* not really tx empty, just checking if tx is not full */
@@ -125,39 +158,6 @@ static unsigned int liteuart_get_mctrl(struct uart_port *port)
 	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
 }
 
-static void liteuart_stop_tx(struct uart_port *port)
-{
-}
-
-static void liteuart_start_tx(struct uart_port *port)
-{
-	struct circ_buf *xmit = &port->state->xmit;
-	unsigned char ch;
-
-	if (unlikely(port->x_char)) {
-		litex_write8(port->membase + OFF_RXTX, port->x_char);
-		port->icount.tx++;
-		port->x_char = 0;
-	} else if (!uart_circ_empty(xmit)) {
-		while (xmit->head != xmit->tail) {
-			ch = xmit->buf[xmit->tail];
-			uart_xmit_advance(port, 1);
-			liteuart_putchar(port, ch);
-		}
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-}
-
-static void liteuart_stop_rx(struct uart_port *port)
-{
-	struct liteuart_port *uart = to_liteuart_port(port);
-
-	/* just delete timer */
-	del_timer(&uart->timer);
-}
-
 static int liteuart_startup(struct uart_port *port)
 {
 	struct liteuart_port *uart = to_liteuart_port(port);
-- 
2.38.1