media: ddbridge: split I/O related functions off from ddbridge.h

While it seems valid that headers can carry simple oneline static inline
annotated functions, move them into their own header file to have the
overall code more readable. Also, keep them as header (and don't put in
a separate object) and static inline to help the compiler avoid
generating function calls.

(Thanks to Jasmin J. <jasmin@anw.at> for valuable input on this!)

Cc: Jasmin J. <jasmin@anw.at>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Tested-by: Richard Scobie <r.scobie@clear.net.nz>
Tested-by: Jasmin Jessich <jasmin@anw.at>
Tested-by: Dietmar Spingler <d_spingler@freenet.de>
Tested-by: Manfred Knick <Manfred.Knick@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/ddbridge/ddbridge-core.c

@@ -37,6 +37,7 @@
 #include "ddbridge.h"
 #include "ddbridge-i2c.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 #include "tda18271c2dd.h"
 #include "stv6110x.h"

drivers/media/pci/ddbridge/ddbridge-i2c.c

@@ -33,6 +33,7 @@
 #include "ddbridge.h"
 #include "ddbridge-i2c.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 /******************************************************************************/
 

drivers/media/pci/ddbridge/ddbridge-io.h

+/*
+ * ddbridge-io.h: Digital Devices bridge I/O inline functions
+ *
+ * Copyright (C) 2010-2017 Digital Devices GmbH
+ *                         Ralph Metzler <rjkm@metzlerbros.de>
+ *                         Marcus Metzler <mocm@metzlerbros.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DDBRIDGE_IO_H__
+#define __DDBRIDGE_IO_H__
+
+#include <linux/io.h>
+
+#include "ddbridge.h"
+
+/******************************************************************************/
+
+static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
+{
+	return readl((char *) (link->dev->regs + (adr)));
+}
+
+static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
+{
+	writel(val, (char *) (link->dev->regs + (adr)));
+}
+
+static inline u32 ddbreadl(struct ddb *dev, u32 adr)
+{
+	return readl((char *) (dev->regs + (adr)));
+}
+
+static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
+{
+	writel(val, (char *) (dev->regs + (adr)));
+}
+
+static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
+{
+	return memcpy_toio((char *) (dev->regs + adr), src, count);
+}
+
+static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
+{
+	return memcpy_fromio(dst, (char *) (dev->regs + adr), count);
+}
+
+static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)
+{
+	u32 val = ddbreadl(dev, adr);
+
+	/* (ddb)readl returns (uint)-1 (all bits set) on failure, catch that */
+	if (val == ~0) {
+		dev_err(&dev->pdev->dev, "ddbreadl failure, adr=%08x\n", adr);
+		return 0;
+	}
+
+	return val;
+}
+
+#endif /* __DDBRIDGE_IO_H__ */

drivers/media/pci/ddbridge/ddbridge-main.c

@@ -35,6 +35,7 @@
 #include "ddbridge.h"
 #include "ddbridge-i2c.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 /****************************************************************************/
 /* module parameters */

drivers/media/pci/ddbridge/ddbridge.h

@@ -349,49 +349,6 @@ struct ddb {
 	u8                     tsbuf[TS_CAPTURE_LEN];
 };
 
-static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
-{
-	return readl((char *) (link->dev->regs + (adr)));
-}
-
-static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
-{
-	writel(val, (char *) (link->dev->regs + (adr)));
-}
-
-static inline u32 ddbreadl(struct ddb *dev, u32 adr)
-{
-	return readl((char *) (dev->regs + (adr)));
-}
-
-static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
-{
-	writel(val, (char *) (dev->regs + (adr)));
-}
-
-static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
-{
-	return memcpy_toio((char *) (dev->regs + adr), src, count);
-}
-
-static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
-{
-	return memcpy_fromio(dst, (char *) (dev->regs + adr), count);
-}
-
-static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)
-{
-	u32 val = ddbreadl(dev, adr);
-
-	/* (ddb)readl returns (uint)-1 (all bits set) on failure, catch that */
-	if (val == ~0) {
-		dev_err(&dev->pdev->dev, "ddbreadl failure, adr=%08x\n", adr);
-		return 0;
-	}
-
-	return val;
-}
-
 /****************************************************************************/
 /****************************************************************************/
 /****************************************************************************/