linux-kernel - [PATCH] mn10300: add io{read,write}{16,32}be functions

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Message-Id: <1429544262-29143-1-git-send-email-linux@roeck-us.net>
Date:	Mon, 20 Apr 2015 08:37:42 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	David Howells <dhowells@...hat.com>
Cc:	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	linux-am33-list@...hat.com, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	Kevin Cernekee <cernekee@...il.com>,
	Rob Herring <robh@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] mn10300: add io{read,write}{16,32}be functions

These functions are used in various drivers, including the latest
version of the 8250 driver. The latter causes the following build failure.

drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_out':
drivers/tty/serial/8250/8250_core.c:456:2: error:
			implicit declaration of function 'iowrite32be'
drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_in':
drivers/tty/serial/8250/8250_core.c:462:2: error:
			implicit declaration of function 'ioread32be'

Cc: Kevin Cernekee <cernekee@...il.com>
Cc: Rob Herring <robh@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Fixes: c627f2ceb692 ("serial: 8250: Add support for big-endian MMIO
	accesses")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
Build failure seen in next-20150420.

 arch/mn10300/include/asm/io.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index 897ba3c..cc4a2ba 100644
--- a/arch/mn10300/include/asm/io.h
+++ b/arch/mn10300/include/asm/io.h
@@ -197,6 +197,11 @@ static inline void outsl(unsigned long addr, const void *buffer, int count)
 #define iowrite16(v, addr)	writew((v), (addr))
 #define iowrite32(v, addr)	writel((v), (addr))
 
+#define ioread16be(addr)	be16_to_cpu(readw(addr))
+#define ioread32be(addr)	be32_to_cpu(readl(addr))
+#define iowrite16be(v, addr)	writew(cpu_to_be16(v), (addr))
+#define iowrite32be(v, addr)	writel(cpu_to_be32(v), (addr))
+
 #define ioread8_rep(p, dst, count) \
 	insb((unsigned long) (p), (dst), (count))
 #define ioread16_rep(p, dst, count) \
-- 
2.1.0

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