linux-kernel - [PATCH v3 11/14] serial: liteuart: move function definitions

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Date:   Sat, 12 Nov 2022 16:21:22 -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 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>
---
 drivers/tty/serial/liteuart.c | 98 +++++++++++++++++------------------
 1 file changed, 49 insertions(+), 49 deletions(-)

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 172ac190ba2f..cf1ce597b45e 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -67,36 +67,6 @@ static struct uart_driver liteuart_driver = {
 #endif
 };
 
-static void liteuart_rx_chars(struct uart_port *port)
-{
-	unsigned char __iomem *membase = port->membase;
-	unsigned int status, ch;
-
-	while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) {
-		ch = litex_read8(membase + OFF_RXTX);
-		port->icount.rx++;
-
-		/* necessary for RXEMPTY to refresh its value */
-		litex_write8(membase + OFF_EV_PENDING, EV_RX);
-
-		/* no overflow bits in status */
-		if (!(uart_handle_sysrq_char(port, ch)))
-			uart_insert_char(port, status, 0, ch, TTY_NORMAL);
-	}
-
-	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));
-}
-
 static void liteuart_putchar(struct uart_port *port, unsigned char ch)
 {
 	while (litex_read8(port->membase + OFF_TXFULL))
@@ -105,25 +75,6 @@ static void liteuart_putchar(struct uart_port *port, unsigned char ch)
 	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 */
-	if (!litex_read8(port->membase + OFF_TXFULL))
-		return TIOCSER_TEMT;
-
-	return 0;
-}
-
-static void liteuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	/* modem control register is not present in LiteUART */
-}
-
-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)
 {
 	/* not used in LiteUART, but called unconditionally from serial_core */
@@ -159,6 +110,55 @@ static void liteuart_stop_rx(struct uart_port *port)
 	del_timer(&uart->timer);
 }
 
+static void liteuart_rx_chars(struct uart_port *port)
+{
+	unsigned char __iomem *membase = port->membase;
+	unsigned int status, ch;
+
+	while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) {
+		ch = litex_read8(membase + OFF_RXTX);
+		port->icount.rx++;
+
+		/* necessary for RXEMPTY to refresh its value */
+		litex_write8(membase + OFF_EV_PENDING, EV_RX);
+
+		/* no overflow bits in status */
+		if (!(uart_handle_sysrq_char(port, ch)))
+			uart_insert_char(port, status, 0, ch, TTY_NORMAL);
+	}
+
+	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));
+}
+
+static unsigned int liteuart_tx_empty(struct uart_port *port)
+{
+	/* not really tx empty, just checking if tx is not full */
+	if (!litex_read8(port->membase + OFF_TXFULL))
+		return TIOCSER_TEMT;
+
+	return 0;
+}
+
+static void liteuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	/* modem control register is not present in LiteUART */
+}
+
+static unsigned int liteuart_get_mctrl(struct uart_port *port)
+{
+	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
 static int liteuart_startup(struct uart_port *port)
 {
 	struct liteuart_port *uart = to_liteuart_port(port);
-- 
2.37.3