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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>,
	"Vladimir Zapolskiy" <vz@mleia.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 05/10] tty: serial: extract tx_ready() from __serial_lpc32xx_tx()
Date: Tue, 20 Sep 2022 07:20:45 +0200	[thread overview]
Message-ID: <20220920052049.20507-6-jslaby@suse.cz> (raw)
In-Reply-To: <20220920052049.20507-1-jslaby@suse.cz>

The condition in __serial_lpc32xx_tx()'s loop is barely readable.
Extract it to a separate function. This will make the cleanup in the
next patches easier too.

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

Notes:
    [v4] this is new in v4 -- extracted as a separate change

 drivers/tty/serial/lpc32xx_hs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index 0d5ef7df27d0..ed47f4768338 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -278,6 +278,13 @@ static void __serial_lpc32xx_rx(struct uart_port *port)
 
 static void serial_lpc32xx_stop_tx(struct uart_port *port);
 
+static bool serial_lpc32xx_tx_ready(struct uart_port *port)
+{
+	u32 level = readl(LPC32XX_HSUART_LEVEL(port->membase));
+
+	return LPC32XX_HSU_TX_LEV(level) < 64;
+}
+
 static void __serial_lpc32xx_tx(struct uart_port *port)
 {
 	struct circ_buf *xmit = &port->state->xmit;
@@ -293,8 +300,7 @@ static void __serial_lpc32xx_tx(struct uart_port *port)
 		goto exit_tx;
 
 	/* Transfer data */
-	while (LPC32XX_HSU_TX_LEV(readl(
-		LPC32XX_HSUART_LEVEL(port->membase))) < 64) {
+	while (serial_lpc32xx_tx_ready(port)) {
 		writel((u32) xmit->buf[xmit->tail],
 		       LPC32XX_HSUART_FIFO(port->membase));
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-- 
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>,
	"Vladimir Zapolskiy" <vz@mleia.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 05/10] tty: serial: extract tx_ready() from __serial_lpc32xx_tx()
Date: Tue, 20 Sep 2022 07:20:45 +0200	[thread overview]
Message-ID: <20220920052049.20507-6-jslaby@suse.cz> (raw)
In-Reply-To: <20220920052049.20507-1-jslaby@suse.cz>

The condition in __serial_lpc32xx_tx()'s loop is barely readable.
Extract it to a separate function. This will make the cleanup in the
next patches easier too.

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

Notes:
    [v4] this is new in v4 -- extracted as a separate change

 drivers/tty/serial/lpc32xx_hs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index 0d5ef7df27d0..ed47f4768338 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -278,6 +278,13 @@ static void __serial_lpc32xx_rx(struct uart_port *port)
 
 static void serial_lpc32xx_stop_tx(struct uart_port *port);
 
+static bool serial_lpc32xx_tx_ready(struct uart_port *port)
+{
+	u32 level = readl(LPC32XX_HSUART_LEVEL(port->membase));
+
+	return LPC32XX_HSU_TX_LEV(level) < 64;
+}
+
 static void __serial_lpc32xx_tx(struct uart_port *port)
 {
 	struct circ_buf *xmit = &port->state->xmit;
@@ -293,8 +300,7 @@ static void __serial_lpc32xx_tx(struct uart_port *port)
 		goto exit_tx;
 
 	/* Transfer data */
-	while (LPC32XX_HSU_TX_LEV(readl(
-		LPC32XX_HSUART_LEVEL(port->membase))) < 64) {
+	while (serial_lpc32xx_tx_ready(port)) {
 		writel((u32) xmit->buf[xmit->tail],
 		       LPC32XX_HSUART_FIFO(port->membase));
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-- 
2.37.3


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  parent 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 ` [PATCH v4 01/10] tty: serial: move and cleanup vt8500_tx_empty() Jiri Slaby
2022-09-20  5:20   ` 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 ` Jiri Slaby [this message]
2022-09-20  5:20   ` [PATCH v4 05/10] tty: serial: extract tx_ready() from __serial_lpc32xx_tx() 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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