Staging: HTC Dream: touchscreen driver for staging

This adds support for synaptic touchscreen, used in HTC dream
cellphone.

This is original version from Arve, fixed only to compile; I do have
cleaner version, but I broken something inside, and this will preserve
authorship better. I originally tried to push the driver directly to
input/touchscreen, but the driver has some issues with interrupt
handling that are more difficult to fix than I expected at first.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/staging/dream/synaptics_i2c_rmi.h

+/*
+ * include/linux/synaptics_i2c_rmi.h - platform data structure for f75375s sensor
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _LINUX_SYNAPTICS_I2C_RMI_H
+#define _LINUX_SYNAPTICS_I2C_RMI_H
+
+#define SYNAPTICS_I2C_RMI_NAME "synaptics-rmi-ts"
+
+enum {
+	SYNAPTICS_FLIP_X = 1UL << 0,
+	SYNAPTICS_FLIP_Y = 1UL << 1,
+	SYNAPTICS_SWAP_XY = 1UL << 2,
+	SYNAPTICS_SNAP_TO_INACTIVE_EDGE = 1UL << 3,
+};
+
+struct synaptics_i2c_rmi_platform_data {
+	uint32_t version;	/* Use this entry for panels with */
+				/* (major << 8 | minor) version or above. */
+				/* If non-zero another array entry follows */
+	int (*power)(int on);	/* Only valid in first array entry */
+	uint32_t flags;
+	uint32_t inactive_left; /* 0x10000 = screen width */
+	uint32_t inactive_right; /* 0x10000 = screen width */
+	uint32_t inactive_top; /* 0x10000 = screen height */
+	uint32_t inactive_bottom; /* 0x10000 = screen height */
+	uint32_t snap_left_on; /* 0x10000 = screen width */
+	uint32_t snap_left_off; /* 0x10000 = screen width */
+	uint32_t snap_right_on; /* 0x10000 = screen width */
+	uint32_t snap_right_off; /* 0x10000 = screen width */
+	uint32_t snap_top_on; /* 0x10000 = screen height */
+	uint32_t snap_top_off; /* 0x10000 = screen height */
+	uint32_t snap_bottom_on; /* 0x10000 = screen height */
+	uint32_t snap_bottom_off; /* 0x10000 = screen height */
+	uint32_t fuzz_x; /* 0x10000 = screen width */
+	uint32_t fuzz_y; /* 0x10000 = screen height */
+	int fuzz_p;
+	int fuzz_w;
+};
+
+#endif /* _LINUX_SYNAPTICS_I2C_RMI_H */