linux-kernel - [v4 2/2] serial: 8250_dw: dw8250_setup

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Message-ID: <1440153223-25712-3-git-send-email-noamc@ezchip.com>
Date:	Fri, 21 Aug 2015 13:33:43 +0300
From:	Noam Camus <noamc@...hip.com>
To:	<linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>
CC:	<gregkh@...uxfoundation.org>, <jslaby@...e.com>,
	<peter@...leysoftware.com>, <fransklaver@...il.com>,
	<Alexey.Brodkin@...opsys.com>, <vgupta@...opsys.com>,
	Noam Camus <noamc@...hip.com>
Subject: [v4 2/2] serial: 8250_dw: dw8250_setup_port() use endianness aware read.

From: Noam Camus <noamc@...hip.com>

readl() for UCV and CPR will not work for port type UPIO_MEM32BE.
Instead we use the serial_in32() accessor which is initialized
properly according to endianness.

Signed-off-by: Noam Camus <noamc@...hip.com>
---
 drivers/tty/serial/8250/8250_dw.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f479433..62f766a 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -310,7 +310,8 @@ static bool dw8250_dma_filter(struct dma_chan *chan, void *param)
 static void dw8250_setup_port(struct uart_8250_port *up)
 {
 	struct uart_port	*p = &up->port;
-	u32			reg = readl(p->membase + DW_UART_UCV);
+	struct dw8250_data	*d = p->private_data;
+	u32			reg = d->serial_in(p->membase + DW_UART_UCV);
 
 	/*
 	 * If the Component Version Register returns zero, we know that
@@ -322,7 +323,7 @@ static void dw8250_setup_port(struct uart_8250_port *up)
 	dev_dbg_ratelimited(p->dev, "Designware UART version %c.%c%c\n",
 		(reg >> 24) & 0xff, (reg >> 16) & 0xff, (reg >> 8) & 0xff);
 
-	reg = readl(p->membase + DW_UART_CPR);
+	reg = d->serial_in(p->membase + DW_UART_CPR);
 	if (!reg)
 		return;
 
-- 
1.7.1

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