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* [PATCH 4.14 293/343] tty: serial: fsl_lpuart: Use appropriate lpuart32_* I/O funcs
       [not found] <20200124092919.490687572@linuxfoundation.org>
@ 2020-01-24  9:31 ` Greg Kroah-Hartman
  0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2020-01-24  9:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Andrey Smirnov, Stefan Agner,
	Bhuvanchandra DV, Chris Healy, Cory Tusar, Lucas Stach,
	Jiri Slaby, linux-imx, linux-serial, Sasha Levin

From: Andrey Smirnov <andrew.smirnov@gmail.com>

[ Upstream commit 1da17d7cf8e2c4b60163d54300f72c02f510327c ]

When dealing with 32-bit variant of LPUART IP block appropriate I/O
helpers have to be used to properly deal with endianness
differences. Change all of the offending code to do that.

Fixes: a5fa2660d787 ("tty/serial/fsl_lpuart: Add CONSOLE_POLL support
for lpuart32.")
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-imx@nxp.com
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/20190729195226.8862-14-andrew.smirnov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/tty/serial/fsl_lpuart.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index fb2dcb3f85911..16422987ab0f3 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -532,26 +532,26 @@ static int lpuart32_poll_init(struct uart_port *port)
 	spin_lock_irqsave(&sport->port.lock, flags);
 
 	/* Disable Rx & Tx */
-	writel(0, sport->port.membase + UARTCTRL);
+	lpuart32_write(&sport->port, UARTCTRL, 0);
 
-	temp = readl(sport->port.membase + UARTFIFO);
+	temp = lpuart32_read(&sport->port, UARTFIFO);
 
 	/* Enable Rx and Tx FIFO */
-	writel(temp | UARTFIFO_RXFE | UARTFIFO_TXFE,
-		   sport->port.membase + UARTFIFO);
+	lpuart32_write(&sport->port, UARTFIFO,
+		       temp | UARTFIFO_RXFE | UARTFIFO_TXFE);
 
 	/* flush Tx and Rx FIFO */
-	writel(UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH,
-			sport->port.membase + UARTFIFO);
+	lpuart32_write(&sport->port, UARTFIFO,
+		       UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH);
 
 	/* explicitly clear RDRF */
-	if (readl(sport->port.membase + UARTSTAT) & UARTSTAT_RDRF) {
-		readl(sport->port.membase + UARTDATA);
-		writel(UARTFIFO_RXUF, sport->port.membase + UARTFIFO);
+	if (lpuart32_read(&sport->port, UARTSTAT) & UARTSTAT_RDRF) {
+		lpuart32_read(&sport->port, UARTDATA);
+		lpuart32_write(&sport->port, UARTFIFO, UARTFIFO_RXUF);
 	}
 
 	/* Enable Rx and Tx */
-	writel(UARTCTRL_RE | UARTCTRL_TE, sport->port.membase + UARTCTRL);
+	lpuart32_write(&sport->port, UARTCTRL, UARTCTRL_RE | UARTCTRL_TE);
 	spin_unlock_irqrestore(&sport->port.lock, flags);
 
 	return 0;
@@ -559,18 +559,18 @@ static int lpuart32_poll_init(struct uart_port *port)
 
 static void lpuart32_poll_put_char(struct uart_port *port, unsigned char c)
 {
-	while (!(readl(port->membase + UARTSTAT) & UARTSTAT_TDRE))
+	while (!(lpuart32_read(port, UARTSTAT) & UARTSTAT_TDRE))
 		barrier();
 
-	writel(c, port->membase + UARTDATA);
+	lpuart32_write(port, UARTDATA, c);
 }
 
 static int lpuart32_poll_get_char(struct uart_port *port)
 {
-	if (!(readl(port->membase + UARTSTAT) & UARTSTAT_RDRF))
+	if (!(lpuart32_read(port, UARTSTAT) & UARTSTAT_RDRF))
 		return NO_POLL_CHAR;
 
-	return readl(port->membase + UARTDATA);
+	return lpuart32_read(port, UARTDATA);
 }
 #endif
 
-- 
2.20.1




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2020-01-24  9:31 ` [PATCH 4.14 293/343] tty: serial: fsl_lpuart: Use appropriate lpuart32_* I/O funcs Greg Kroah-Hartman

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