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

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Message-Id: <1429544175-29047-1-git-send-email-linux@roeck-us.net>
Date:	Mon, 20 Apr 2015 08:36:15 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	David Howells <dhowells@...hat.com>
Cc:	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] frv: 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/frv/include/asm/io.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/frv/include/asm/io.h b/arch/frv/include/asm/io.h
index 99bb7ef..0b78bc8 100644
--- a/arch/frv/include/asm/io.h
+++ b/arch/frv/include/asm/io.h
@@ -342,6 +342,11 @@ static inline void iowrite32(u32 val, void __iomem *p)
 		__flush_PCI_writes();
 }
 
+#define ioread16be(addr)	be16_to_cpu(ioread16(addr))
+#define ioread32be(addr)	be32_to_cpu(ioread32(addr))
+#define iowrite16be(v, addr)	iowrite16(cpu_to_be16(v), (addr))
+#define iowrite32be(v, addr)	iowrite32(cpu_to_be32(v), (addr))
+
 static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count)
 {
 	io_insb((unsigned long) p, dst, count);
-- 
2.1.0

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