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From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Jiri Slaby" <jslaby@suse.cz>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 01/10] tty: serial: move and cleanup vt8500_tx_empty()
Date: Tue, 20 Sep 2022 07:20:41 +0200	[thread overview]
Message-ID: <20220920052049.20507-2-jslaby@suse.cz> (raw)
In-Reply-To: <20220920052049.20507-1-jslaby@suse.cz>

Make vt8500_tx_empty() more readable by introducing a new local variable
and move the function before handle_tx(). That way we can reuse it in
there too.

Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

Notes:
    [v3] this is new in v3 -- extracted as a separate change from later
         patches

 drivers/tty/serial/vt8500_serial.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 508ad7afa6de..10fbdb09965f 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -187,6 +187,13 @@ static void handle_rx(struct uart_port *port)
 	tty_flip_buffer_push(tport);
 }
 
+static unsigned int vt8500_tx_empty(struct uart_port *port)
+{
+	unsigned int idx = vt8500_read(port, VT8500_URFIDX) & 0x1f;
+
+	return idx < 16 ? TIOCSER_TEMT : 0;
+}
+
 static void handle_tx(struct uart_port *port)
 {
 	struct circ_buf *xmit = &port->state->xmit;
@@ -201,7 +208,7 @@ static void handle_tx(struct uart_port *port)
 		return;
 	}
 
-	while ((vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16) {
+	while (vt8500_tx_empty(port)) {
 		if (uart_circ_empty(xmit))
 			break;
 
@@ -260,12 +267,6 @@ static irqreturn_t vt8500_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static unsigned int vt8500_tx_empty(struct uart_port *port)
-{
-	return (vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16 ?
-						TIOCSER_TEMT : 0;
-}
-
 static unsigned int vt8500_get_mctrl(struct uart_port *port)
 {
 	unsigned int usr;
-- 
2.37.3


WARNING: multiple messages have this Message-ID (diff)
From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Jiri Slaby" <jslaby@suse.cz>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 01/10] tty: serial: move and cleanup vt8500_tx_empty()
Date: Tue, 20 Sep 2022 07:20:41 +0200	[thread overview]
Message-ID: <20220920052049.20507-2-jslaby@suse.cz> (raw)
In-Reply-To: <20220920052049.20507-1-jslaby@suse.cz>

Make vt8500_tx_empty() more readable by introducing a new local variable
and move the function before handle_tx(). That way we can reuse it in
there too.

Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

Notes:
    [v3] this is new in v3 -- extracted as a separate change from later
         patches

 drivers/tty/serial/vt8500_serial.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 508ad7afa6de..10fbdb09965f 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -187,6 +187,13 @@ static void handle_rx(struct uart_port *port)
 	tty_flip_buffer_push(tport);
 }
 
+static unsigned int vt8500_tx_empty(struct uart_port *port)
+{
+	unsigned int idx = vt8500_read(port, VT8500_URFIDX) & 0x1f;
+
+	return idx < 16 ? TIOCSER_TEMT : 0;
+}
+
 static void handle_tx(struct uart_port *port)
 {
 	struct circ_buf *xmit = &port->state->xmit;
@@ -201,7 +208,7 @@ static void handle_tx(struct uart_port *port)
 		return;
 	}
 
-	while ((vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16) {
+	while (vt8500_tx_empty(port)) {
 		if (uart_circ_empty(xmit))
 			break;
 
@@ -260,12 +267,6 @@ static irqreturn_t vt8500_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static unsigned int vt8500_tx_empty(struct uart_port *port)
-{
-	return (vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16 ?
-						TIOCSER_TEMT : 0;
-}
-
 static unsigned int vt8500_get_mctrl(struct uart_port *port)
 {
 	unsigned int usr;
-- 
2.37.3


_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2022-09-20  5:21 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-20  5:20 [PATCH v4 00/10] tty: TX helpers Jiri Slaby
2022-09-20  5:20 ` Jiri Slaby [this message]
2022-09-20  5:20   ` [PATCH v4 01/10] tty: serial: move and cleanup vt8500_tx_empty() Jiri Slaby
2022-09-20  7:53   ` Ilpo Järvinen
2022-09-20  7:53     ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 02/10] tty: serial: clean up stop-tx part in altera_uart_tx_chars() Jiri Slaby
2022-09-20  8:03   ` Ilpo Järvinen
2022-09-20 14:17   ` Tobias Klauser
2022-09-20  5:20 ` [PATCH v4 03/10] tty: serial: altera_uart_{r,t}x_chars() need only uart_port Jiri Slaby
2022-09-20  8:04   ` Ilpo Järvinen
2022-09-20 14:15   ` Tobias Klauser
2022-09-20  5:20 ` [PATCH v4 04/10] tty: serial: extract lqasc_tx_ready() from lqasc_tx_chars() Jiri Slaby
2022-09-20  8:03   ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 05/10] tty: serial: extract tx_ready() from __serial_lpc32xx_tx() Jiri Slaby
2022-09-20  5:20   ` Jiri Slaby
2022-09-20  8:11   ` Ilpo Järvinen
2022-09-20  8:11     ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 06/10] tty: serial: switch mpc52xx_uart_int_{r,t}x_chars() to bool Jiri Slaby
2022-09-20  8:37   ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 07/10] tty: serial: extract serial_omap_put_char() from transmit_chars() Jiri Slaby
2022-09-20  8:37   ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 08/10] tty: serial: introduce transmit helpers Jiri Slaby
2022-09-20  8:43   ` Ilpo Järvinen
2022-09-20  5:20 ` [PATCH v4 09/10] tty: serial: use uart_port_tx() helper Jiri Slaby
2022-09-20  8:54   ` Ilpo Järvinen
2022-09-20  8:56     ` Jiri Slaby
2022-09-20  7:58 ` [PATCH v4 10/10] tty: serial: use uart_port_tx_limited() Jiri Slaby
2022-09-20  7:58   ` Jiri Slaby
2022-09-20  9:19   ` Ilpo Järvinen
2022-09-20  9:19     ` Ilpo Järvinen
2022-09-20 10:58     ` Jiri Slaby
2022-09-20 10:58       ` Jiri Slaby
2022-09-22 14:15 ` [PATCH v4 00/10] tty: TX helpers Greg KH

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