Input: ad7879 - split bus logic out

The ad7879 driver is using the old bus method of only supporting one
at a time (I2C or SPI). So refactor it like the other input drivers
that support multiple busses simultaneously.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/ad7879.h

@@ -0,0 +1,30 @@
+/*
+ * AD7879/AD7889 touchscreen (bus interfaces)
+ *
+ * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _AD7879_H_
+#define _AD7879_H_
+
+#include <linux/types.h>
+
+struct ad7879;
+struct device;
+
+struct ad7879_bus_ops {
+	u16 bustype;
+	int (*read)(struct device *dev, u8 reg);
+	int (*multi_read)(struct device *dev, u8 first_reg, u8 count, u16 *buf);
+	int (*write)(struct device *dev, u8 reg, u16 val);
+};
+
+void ad7879_disable(struct ad7879 *);
+void ad7879_enable(struct ad7879 *);
+struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned irq,
+			    const struct ad7879_bus_ops *bops);
+void ad7879_remove(struct ad7879 *);
+
+#endif