Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: remove scan_keyb driver
  Input: i8042 - fix AUX IRQ delivery check
  Input: wistron - add support for Fujitsu-Siemens Amilo D88x0
  Input: inport - use correct config option for ATIXL
  Input: HIL - handle erros from input_register_device()
  Input: tsdev - schedule removal
  Input: add Atlas button driver
  Input: ads7846 - be more compatible with the hwmon framework
  Input: ads7846 - detect pen up from GPIO state
  Input: ads7846 - select correct SPI mode
  Input: ads7846 - switch to using hrtimer
  Input: ads7846 - optionally leave Vref on during differential measurements
  Input: ads7846 - pluggable filtering logic
  Input: gpio-keys - keyboard driver for GPIO buttons
  Input: hid-ff - add support for Logitech Momo racing wheel
  Input: i8042 - really suppress ACK/NAK during panic blink
  Input: pc110pad - return proper error

Documentation/feature-removal-schedule.txt

@@ -319,3 +319,18 @@ Why:    In kernel tree version of driver is unmaintained. Sk98lin driver
 	replaced by the skge driver. 
 Who:    Stephen Hemminger <shemminger@osdl.org>
 
+---------------------------
+
+What:	Compaq touchscreen device emulation
+When:	Oct 2007
+Files:	drivers/input/tsdev.c
+Why:	The code says it was obsolete when it was written in 2001.
+	tslib is a userspace library which does anything tsdev can do and
+	much more besides in userspace where this code belongs. There is no
+	longer any need for tsdev and applications should have converted to
+	use tslib by now.
+	The name "tsdev" is also extremely confusing and lots of people have
+	it loaded when they don't need/use it.
+Who:	Richard Purdie <rpurdie@rpsys.net>
+
+---------------------------

drivers/char/scan_keyb.c

-/*
- *	$Id: scan_keyb.c,v 1.2 2000/07/04 06:24:42 yaegashi Exp $ 
- *	Copyright (C) 2000 YAEGASHI Takeshi
- *	Generic scan keyboard driver
- */
-
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/mm.h>
-#include <linux/signal.h>
-#include <linux/init.h>
-#include <linux/kbd_ll.h>
-#include <linux/delay.h>
-#include <linux/random.h>
-#include <linux/poll.h>
-#include <linux/miscdevice.h>
-#include <linux/slab.h>
-#include <linux/kbd_kern.h>
-#include <linux/timer.h>
-
-#define SCANHZ	(HZ/20)
-
-struct scan_keyboard {
-	struct scan_keyboard *next;
-	int (*scan)(unsigned char *buffer);
-	const unsigned char *table;
-	unsigned char *s0, *s1;
-	int length;
-};
-
-static int scan_jiffies=0;
-static struct scan_keyboard *keyboards=NULL;
-struct timer_list scan_timer;
-
-static void check_kbd(const unsigned char *table,
-		      unsigned char *new, unsigned char *old, int length)
-{
-	int need_tasklet_schedule=0;
-	unsigned int xor, bit;
-	
-	while(length-->0) {
-		if((xor=*new^*old)==0) {
-			table+=8;
-		}
-		else {
-			for(bit=0x01; bit<0x100; bit<<=1) {
-				if(xor&bit) {
-					handle_scancode(*table, !(*new&bit));
-					need_tasklet_schedule=1;
-#if 0
-					printk("0x%x %s\n", *table, (*new&bit)?"released":"pressed");
-#endif
-				}
-				table++;
-			}
-		}
-		new++; old++;
-	}
-
-	if(need_tasklet_schedule)
-		tasklet_schedule(&keyboard_tasklet);
-}
-
-
-static void scan_kbd(unsigned long dummy)
-{
-	struct scan_keyboard *kbd;
-
-	scan_jiffies++;
-
-	for(kbd=keyboards; kbd!=NULL; kbd=kbd->next) {
-		if(scan_jiffies&1) {
-			if(!kbd->scan(kbd->s0))
-				check_kbd(kbd->table,
-					  kbd->s0, kbd->s1, kbd->length);
-			else
-				memcpy(kbd->s0, kbd->s1, kbd->length);
-		}
-		else {
-			if(!kbd->scan(kbd->s1))
-				check_kbd(kbd->table,
-					  kbd->s1, kbd->s0, kbd->length);
-			else
-				memcpy(kbd->s1, kbd->s0, kbd->length);
-		}
-		
-	}
-
-	init_timer(&scan_timer);
-	scan_timer.expires = jiffies + SCANHZ;
-	scan_timer.data = 0;
-	scan_timer.function = scan_kbd;
-	add_timer(&scan_timer);
-}
-
-
-int register_scan_keyboard(int (*scan)(unsigned char *buffer),
-			   const unsigned char *table,
-			   int length)
-{
-	struct scan_keyboard *kbd;
-
-	kbd = kmalloc(sizeof(struct scan_keyboard), GFP_KERNEL);
-	if (kbd == NULL)
-		goto error_out;
-
-	kbd->scan=scan;
-	kbd->table=table;
-	kbd->length=length;
-
-	kbd->s0 = kmalloc(length, GFP_KERNEL);
-	if (kbd->s0 == NULL)
-		goto error_free_kbd;
-
-	kbd->s1 = kmalloc(length, GFP_KERNEL);
-	if (kbd->s1 == NULL)
-		goto error_free_s0;
-
-	memset(kbd->s0, -1, kbd->length);
-	memset(kbd->s1, -1, kbd->length);
-	
-	kbd->next=keyboards;
-	keyboards=kbd;
-
-	return 0;
-
- error_free_s0:
-	kfree(kbd->s0);
-
- error_free_kbd:
-	kfree(kbd);
-
- error_out:
-	return -ENOMEM;
-}
-			      
-			      
-void __init scan_kbd_init(void)
-{
-	init_timer(&scan_timer);
-	scan_timer.expires = jiffies + SCANHZ;
-	scan_timer.data = 0;
-	scan_timer.function = scan_kbd;
-	add_timer(&scan_timer);
-
-	printk(KERN_INFO "Generic scan keyboard driver initialized\n");
-}

drivers/char/scan_keyb.h

-#ifndef	__DRIVER_CHAR_SCAN_KEYB_H
-#define	__DRIVER_CHAR_SCAN_KEYB_H
-/*
- *	$Id: scan_keyb.h,v 1.1 2000/06/10 21:45:30 yaegashi Exp $
- *	Copyright (C) 2000 YAEGASHI Takeshi
- *	Generic scan keyboard driver
- */
-
-int register_scan_keyboard(int (*scan)(unsigned char *buffer),
-			   const unsigned char *table,
-			   int length);
-
-void __init scan_kbd_init(void);
-
-#endif

drivers/input/keyboard/Kconfig

@@ -135,12 +135,12 @@ config KEYBOARD_STOWAWAY
 config KEYBOARD_CORGI
 	tristate "Corgi keyboard"
 	depends on PXA_SHARPSL
-	default y	
+	default y
 	help
-	  Say Y here to enable the keyboard on the Sharp Zaurus SL-C7xx 
+	  Say Y here to enable the keyboard on the Sharp Zaurus SL-C7xx
 	  series of PDAs.
 
-	  To compile this driver as a module, choose M here: the 
+	  To compile this driver as a module, choose M here: the
 	  module will be called corgikbd.
 
 config KEYBOARD_SPITZ
@@ -214,4 +214,17 @@ config KEYBOARD_AAED2000
 	  To compile this driver as a module, choose M here: the
 	  module will be called aaed2000_kbd.
 
+config KEYBOARD_GPIO
+        tristate "Buttons on CPU GPIOs (PXA)"
+        depends on ARCH_PXA
+	help
+	  This driver implements support for buttons connected
+	  directly to GPIO pins of PXA CPUs.
+
+	  Say Y here if your device has buttons connected
+	  directly to GPIO pins of the CPU.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gpio-keys.
+
 endif

drivers/input/keyboard/Makefile

@@ -16,6 +16,7 @@ obj-$(CONFIG_KEYBOARD_CORGI)		+= corgikbd.o
 obj-$(CONFIG_KEYBOARD_SPITZ)		+= spitzkbd.o
 obj-$(CONFIG_KEYBOARD_HIL)		+= hil_kbd.o
 obj-$(CONFIG_KEYBOARD_HIL_OLD)		+= hilkbd.o
-obj-$(CONFIG_KEYBOARD_OMAP)             += omap-keypad.o
-obj-$(CONFIG_KEYBOARD_AAED2000)         += aaed2000_kbd.o
+obj-$(CONFIG_KEYBOARD_OMAP)		+= omap-keypad.o
+obj-$(CONFIG_KEYBOARD_AAED2000)		+= aaed2000_kbd.o
+obj-$(CONFIG_KEYBOARD_GPIO)		+= gpio_keys.o
 

drivers/input/keyboard/gpio_keys.c

+/*
+ * Driver for keys on GPIO lines capable of generating interrupts.
+ *
+ * Copyright 2005 Phil Blundell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/hardware.h>
+
+#include <asm/hardware/gpio_keys.h>
+
+static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
+{
+	int i;
+	struct platform_device *pdev = dev_id;
+	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
+	struct input_dev *input = platform_get_drvdata(pdev);
+
+	for (i = 0; i < pdata->nbuttons; i++) {
+		int gpio = pdata->buttons[i].gpio;
+		if (irq == IRQ_GPIO(gpio)) {
+			int state = ((GPLR(gpio) & GPIO_bit(gpio)) ? 1 : 0) ^ (pdata->buttons[i].active_low);
+
+			input_report_key(input, pdata->buttons[i].keycode, state);
+			input_sync(input);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int __devinit gpio_keys_probe(struct platform_device *pdev)
+{
+	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
+	struct input_dev *input;
+	int i, error;
+
+	input = input_allocate_device();
+	if (!input)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, input);
+
+	input->evbit[0] = BIT(EV_KEY);
+
+	input->name = pdev->name;
+	input->phys = "gpio-keys/input0";
+	input->cdev.dev = &pdev->dev;
+	input->private = pdata;
+
+	input->id.bustype = BUS_HOST;
+	input->id.vendor = 0x0001;
+	input->id.product = 0x0001;
+	input->id.version = 0x0100;
+
+	for (i = 0; i < pdata->nbuttons; i++) {
+		int code = pdata->buttons[i].keycode;
+		int irq = IRQ_GPIO(pdata->buttons[i].gpio);
+
+		set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
+		error = request_irq(irq, gpio_keys_isr, SA_SAMPLE_RANDOM,
+				     pdata->buttons[i].desc ? pdata->buttons[i].desc : "gpio_keys",
+				     pdev);
+		if (error) {
+			printk(KERN_ERR "gpio-keys: unable to claim irq %d; error %d\n", irq, ret);
+			goto fail;
+		}
+		set_bit(code, input->keybit);
+	}
+
+	error = input_register_device(input);
+	if (error) {
+		printk(KERN_ERR "Unable to register gpio-keys input device\n");
+		goto fail;
+	}
+
+	return 0;
+
+ fail:
+	for (i = i - 1; i >= 0; i--)
+		free_irq(IRQ_GPIO(pdata->buttons[i].gpio), pdev);
+
+	input_free_device(input);
+
+	return error;
+}
+
+static int __devexit gpio_keys_remove(struct platform_device *pdev)
+{
+	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
+	struct input_dev *input = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < pdata->nbuttons; i++) {
+		int irq = IRQ_GPIO(pdata->buttons[i].gpio);
+		free_irq(irq, pdev);
+	}
+
+	input_unregister_device(input);
+
+	return 0;
+}
+
+struct platform_driver gpio_keys_device_driver = {
+	.probe		= gpio_keys_probe,
+	.remove		= __devexit_p(gpio_keys_remove),
+	.driver		= {
+		.name	= "gpio-keys",
+	}
+};
+
+static int __init gpio_keys_init(void)
+{
+	return platform_driver_register(&gpio_keys_device_driver);
+}
+
+static void __exit gpio_keys_exit(void)
+{
+	platform_driver_unregister(&gpio_keys_device_driver);
+}
+
+module_init(gpio_keys_init);
+module_exit(gpio_keys_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>");
+MODULE_DESCRIPTION("Keyboard driver for CPU GPIOs");

drivers/input/keyboard/hilkbd.c

@@ -6,10 +6,10 @@
  *  Copyright (C) 1999-2006 Helge Deller <deller@gmx.de>
  *
  *  Very basic HP Human Interface Loop (HIL) driver.
- *  This driver handles the keyboard on HP300 (m68k) and on some 
+ *  This driver handles the keyboard on HP300 (m68k) and on some
  *  HP700 (parisc) series machines.
  *
- * 
+ *
  * This file is subject to the terms and conditions of the GNU General Public
  * License version 2.  See the file COPYING in the main directory of this
  * archive for more details.
@@ -64,9 +64,9 @@ MODULE_LICENSE("GPL v2");
 #endif
 
 
- 
+
 /* HIL helper functions */
- 
+
 #define hil_busy()              (hil_readb(HILBASE + HIL_CMD) & HIL_BUSY)
 #define hil_data_available()    (hil_readb(HILBASE + HIL_CMD) & HIL_DATA_RDY)
 #define hil_status()            (hil_readb(HILBASE + HIL_CMD))
@@ -75,7 +75,7 @@ MODULE_LICENSE("GPL v2");
 #define hil_write_data(x)       do { hil_writeb((x), HILBASE + HIL_DATA); } while (0)
 
 /* HIL constants */
- 
+
 #define	HIL_BUSY		0x02
 #define	HIL_DATA_RDY		0x01
 
@@ -86,10 +86,10 @@ MODULE_LICENSE("GPL v2");
 #define	HIL_INTON		0x5C		/* Turn on interrupts. */
 #define	HIL_INTOFF		0x5D		/* Turn off interrupts. */
 
-#define	HIL_READKBDSADR	 	0xF9
-#define	HIL_WRITEKBDSADR 	0xE9
+#define	HIL_READKBDSADR		0xF9
+#define	HIL_WRITEKBDSADR	0xE9
 
-static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] = 
+static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] =
 	{ HIL_KEYCODES_SET1 };
 
 /* HIL structure */
@@ -97,11 +97,11 @@ static struct {
 	struct input_dev *dev;
 
 	unsigned int curdev;
-	
+
 	unsigned char s;
 	unsigned char c;
 	int valid;
-	
+
 	unsigned char data[16];
 	unsigned int ptr;
 	spinlock_t lock;
@@ -115,7 +115,7 @@ static void poll_finished(void)
 	int down;
 	int key;
 	unsigned char scode;
-	
+
 	switch (hil_dev.data[0]) {
 	case 0x40:
 		down = (hil_dev.data[1] & 1) == 0;
@@ -127,6 +127,7 @@ static void poll_finished(void)
 	hil_dev.curdev = 0;
 }
 
+
 static inline void handle_status(unsigned char s, unsigned char c)
 {
 	if (c & 0x8) {
@@ -143,6 +144,7 @@ static inline void handle_status(unsigned char s, unsigned char c)
 	}
 }
 
+
 static inline void handle_data(unsigned char s, unsigned char c)
 {
 	if (hil_dev.curdev) {
@@ -152,13 +154,11 @@ static inline void handle_data(unsigned char s, unsigned char c)
 }
 
 
-/* 
- * Handle HIL interrupts.
- */
+/* handle HIL interrupts */
 static irqreturn_t hil_interrupt(int irq, void *handle)
 {
 	unsigned char s, c;
-	
+
 	s = hil_status();
 	c = hil_read_data();
 
@@ -179,10 +179,8 @@ static irqreturn_t hil_interrupt(int irq, void *handle)
 	return IRQ_HANDLED;
 }
 
-/*
- * Send a command to the HIL
- */
 
+/* send a command to the HIL */
 static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
 {
 	unsigned long flags;
@@ -200,16 +198,14 @@ static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
 }
 
 
-/*
- * Initialise HIL. 
- */
-
+/* initialise HIL */
 static int __init
 hil_keyb_init(void)
 {
 	unsigned char c;
 	unsigned int i, kbid;
 	wait_queue_head_t hil_wait;
+	int err;
 
 	if (hil_dev.dev) {
 		return -ENODEV; /* already initialized */
@@ -219,15 +215,25 @@ hil_keyb_init(void)
 	if (!hil_dev.dev)
 		return -ENOMEM;
 	hil_dev.dev->private = &hil_dev;
-	
+
 #if defined(CONFIG_HP300)
-	if (!hwreg_present((void *)(HILBASE + HIL_DATA)))
-		return -ENODEV;
-	
-	request_region(HILBASE+HIL_DATA, 2, "hil");
+	if (!hwreg_present((void *)(HILBASE + HIL_DATA))) {
+		printk(KERN_ERR "HIL: hardware register was not found\n");
+		err = -ENODEV;
+		goto err1;
+	}
+	if (!request_region(HILBASE + HIL_DATA, 2, "hil")) {
+		printk(KERN_ERR "HIL: IOPORT region already used\n");
+		err = -EIO;
+		goto err1;
+	}
 #endif
-	
-	request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
+
+	err = request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
+	if (err) {
+		printk(KERN_ERR "HIL: Can't get IRQ\n");
+		goto err2;
+	}
 
 	/* Turn on interrupts */
 	hil_do(HIL_INTON, NULL, 0);
@@ -239,47 +245,63 @@ hil_keyb_init(void)
 	init_waitqueue_head(&hil_wait);
 	wait_event_interruptible_timeout(hil_wait, hil_dev.valid, 3*HZ);
 	if (!hil_dev.valid) {
-		printk(KERN_WARNING "HIL: timed out, assuming no keyboard present.\n");
+		printk(KERN_WARNING "HIL: timed out, assuming no keyboard present\n");
 	}
 
-	c = hil_dev.c; 
+	c = hil_dev.c;
 	hil_dev.valid = 0;
 	if (c == 0) {
 		kbid = -1;
-		printk(KERN_WARNING "HIL: no keyboard present.\n");
+		printk(KERN_WARNING "HIL: no keyboard present\n");
 	} else {
 		kbid = ffz(~c);
-		/* printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid); */
+		printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid);
 	}
 
 	/* set it to raw mode */
 	c = 0;
 	hil_do(HIL_WRITEKBDSADR, &c, 1);
-	
+
 	for (i = 0; i < HIL_KEYCODES_SET1_TBLSIZE; i++)
 		if (hphilkeyb_keycode[i] != KEY_RESERVED)
 			set_bit(hphilkeyb_keycode[i], hil_dev.dev->keybit);
 
-	hil_dev.dev->evbit[0]    = BIT(EV_KEY) | BIT(EV_REP);
-	hil_dev.dev->ledbit[0]   = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
-	hil_dev.dev->keycodemax  = HIL_KEYCODES_SET1_TBLSIZE;
-	hil_dev.dev->keycodesize = sizeof(hphilkeyb_keycode[0]);
-	hil_dev.dev->keycode     = hphilkeyb_keycode;
-	hil_dev.dev->name 	= "HIL keyboard";
-	hil_dev.dev->phys 	= "hpkbd/input0";
+	hil_dev.dev->evbit[0]	= BIT(EV_KEY) | BIT(EV_REP);
+	hil_dev.dev->ledbit[0]	= BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
+	hil_dev.dev->keycodemax	= HIL_KEYCODES_SET1_TBLSIZE;
+	hil_dev.dev->keycodesize= sizeof(hphilkeyb_keycode[0]);
+	hil_dev.dev->keycode	= hphilkeyb_keycode;
+	hil_dev.dev->name	= "HIL keyboard";
+	hil_dev.dev->phys	= "hpkbd/input0";
 
 	hil_dev.dev->id.bustype	= BUS_HIL;
 	hil_dev.dev->id.vendor	= PCI_VENDOR_ID_HP;
 	hil_dev.dev->id.product	= 0x0001;
 	hil_dev.dev->id.version	= 0x0010;
 
-	input_register_device(hil_dev.dev);
+	err = input_register_device(hil_dev.dev);
+	if (err) {
+		printk(KERN_ERR "HIL: Can't register device\n");
+		goto err3;
+	}
 	printk(KERN_INFO "input: %s, ID %d at 0x%08lx (irq %d) found and attached\n",
-		hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
+	       hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
 
 	return 0;
+
+err3:
+	hil_do(HIL_INTOFF, NULL, 0);
+	disable_irq(HIL_IRQ);
+	free_irq(HIL_IRQ, hil_dev.dev_id);
+err2:
+	release_region(HILBASE + HIL_DATA, 2);
+err1:
+	input_free_device(hil_dev.dev);
+	hil_dev.dev = NULL;
+	return err;
 }
 
+
 #if defined(CONFIG_PARISC)
 static int __init
 hil_init_chip(struct parisc_device *dev)
@@ -292,7 +314,7 @@ hil_init_chip(struct parisc_device *dev)
 	hil_base = dev->hpa.start;
 	hil_irq  = dev->irq;
 	hil_dev.dev_id = dev;
-	
+
 	printk(KERN_INFO "Found HIL bus at 0x%08lx, IRQ %d\n", hil_base, hil_irq);
 
 	return hil_keyb_init();
@@ -313,9 +335,6 @@ static struct parisc_driver hil_driver = {
 #endif /* CONFIG_PARISC */
 
 
-
-
-
 static int __init hil_init(void)
 {
 #if defined(CONFIG_PARISC)
@@ -349,4 +368,3 @@ static void __exit hil_exit(void)
 
 module_init(hil_init);
 module_exit(hil_exit);
-

drivers/input/misc/Kconfig

@@ -50,6 +50,16 @@ config INPUT_WISTRON_BTNS
 	  To compile this driver as a module, choose M here: the module will
 	  be called wistron_btns.
 
+config INPUT_ATLAS_BTNS
+	tristate "x86 Atlas button interface"
+	depends on X86 && ACPI
+	help
+	  Say Y here for support of Atlas wallmount touchscreen buttons.
+	  The events will show up as scancodes F1 through F9 via evdev.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called atlas_btns.
+
 config INPUT_IXP4XX_BEEPER
 	tristate "IXP4XX Beeper support"
 	depends on ARCH_IXP4XX

drivers/input/misc/Makefile

@@ -9,5 +9,6 @@ obj-$(CONFIG_INPUT_PCSPKR)		+= pcspkr.o
 obj-$(CONFIG_INPUT_M68K_BEEP)		+= m68kspkr.o
 obj-$(CONFIG_INPUT_UINPUT)		+= uinput.o
 obj-$(CONFIG_INPUT_WISTRON_BTNS)	+= wistron_btns.o
+obj-$(CONFIG_INPUT_ATLAS_BTNS)		+= atlas_btns.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o

drivers/input/misc/atlas_btns.c

+/*
+ *  atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
+ *
+ *  Copyright (C) 2006 Jaya Kumar
+ *  Based on Toshiba ACPI by John Belmonte and ASUS ACPI
+ *  This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+#include <acpi/acpi_drivers.h>
+
+#define ACPI_ATLAS_NAME			"Atlas ACPI"
+#define ACPI_ATLAS_CLASS		"Atlas"
+#define ACPI_ATLAS_BUTTON_HID		"ASIM0000"
+
+static struct input_dev *input_dev;
+
+/* button handling code */
+static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
+		    u32 function, void *handler_context, void **return_context)
+{
+	*return_context =
+		(function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
+
+	return AE_OK;
+}
+
+static acpi_status acpi_atlas_button_handler(u32 function,
+		      acpi_physical_address address,
+		      u32 bit_width, acpi_integer *value,
+		      void *handler_context, void *region_context)
+{
+	acpi_status status;
+	int keycode;
+
+	if (function == ACPI_WRITE) {
+		keycode = KEY_F1 + (address & 0x0F);
+		input_report_key(input_dev, keycode, !(address & 0x10));
+		input_sync(input_dev);
+		status = 0;
+	} else {
+		printk(KERN_WARNING "atlas: shrugged on unexpected function"
+			":function=%x,address=%lx,value=%x\n",
+			function, (unsigned long)address, (u32)*value);
+		status = -EINVAL;
+	}
+
+	return status;
+}
+
+static int atlas_acpi_button_add(struct acpi_device *device)
+{
+	acpi_status status;
+	int err;
+
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		printk(KERN_ERR "atlas: unable to allocate input device\n");
+		return -ENOMEM;
+	}
+
+	input_dev->name = "Atlas ACPI button driver";
+	input_dev->phys = "ASIM0000/atlas/input0";
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
+
+	set_bit(KEY_F1, input_dev->keybit);
+	set_bit(KEY_F2, input_dev->keybit);
+	set_bit(KEY_F3, input_dev->keybit);
+	set_bit(KEY_F4, input_dev->keybit);
+	set_bit(KEY_F5, input_dev->keybit);
+	set_bit(KEY_F6, input_dev->keybit);
+	set_bit(KEY_F7, input_dev->keybit);
+	set_bit(KEY_F8, input_dev->keybit);
+	set_bit(KEY_F9, input_dev->keybit);
+
+	err = input_register_device(input_dev);
+	if (err) {
+		printk(KERN_ERR "atlas: couldn't register input device\n");
+		input_free_device(input_dev);
+		return err;
+	}
+
+	/* hookup button handler */
+	status = acpi_install_address_space_handler(device->handle,
+				0x81, &acpi_atlas_button_handler,
+				&acpi_atlas_button_setup, device);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "Atlas: Error installing addr spc handler\n");
+		input_unregister_device(input_dev);
+		status = -EINVAL;
+	}
+
+	return status;
+}
+
+static int atlas_acpi_button_remove(struct acpi_device *device, int type)
+{
+	acpi_status status;
+
+	status = acpi_remove_address_space_handler(device->handle,
+				0x81, &acpi_atlas_button_handler);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "Atlas: Error removing addr spc handler\n");
+		status = -EINVAL;
+	}
+
+	input_unregister_device(input_dev);
+
+	return status;
+}
+
+static struct acpi_driver atlas_acpi_driver = {
+	.name	= ACPI_ATLAS_NAME,
+	.class	= ACPI_ATLAS_CLASS,
+	.ids	= ACPI_ATLAS_BUTTON_HID,
+	.ops	= {
+		.add	= atlas_acpi_button_add,
+		.remove	= atlas_acpi_button_remove,
+	},
+};
+
+static int __init atlas_acpi_init(void)
+{
+	int result;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	result = acpi_bus_register_driver(&atlas_acpi_driver);
+	if (result < 0) {
+		printk(KERN_ERR "Atlas ACPI: Unable to register driver\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void __exit atlas_acpi_exit(void)
+{
+	acpi_bus_unregister_driver(&atlas_acpi_driver);
+}
+
+module_init(atlas_acpi_init);
+module_exit(atlas_acpi_exit);
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Atlas button driver");
+

drivers/input/misc/wistron_btns.c

@@ -335,6 +335,17 @@ static struct key_entry keymap_aopen_1559as[] = {
 	{ KE_END,  0 },
 };
 
+static struct key_entry keymap_fs_amilo_d88x0[] = {
+	{ KE_KEY, 0x01, KEY_HELP },
+	{ KE_KEY, 0x08, KEY_MUTE },
+	{ KE_KEY, 0x31, KEY_MAIL },
+	{ KE_KEY, 0x36, KEY_WWW },
+	{ KE_KEY, 0x11, KEY_PROG1 },
+	{ KE_KEY, 0x12, KEY_PROG2 },
+	{ KE_KEY, 0x13, KEY_PROG3 },
+	{ KE_END, 0 }
+};
+
 /*
  * If your machine is not here (which is currently rather likely), please send
  * a list of buttons and their key codes (reported when loading this module
@@ -413,6 +424,15 @@ static struct dmi_system_id dmi_ids[] __initdata = {
 		},
 		.driver_data = keymap_wistron_ms2111
 	},
+	{
+		.callback = dmi_matched,
+		.ident = "Fujitsu Siemens Amilo D88x0",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO D"),
+		},
+		.driver_data = keymap_fs_amilo_d88x0
+	},
 	{ NULL, }
 };
 

drivers/input/mouse/inport.c

@@ -61,7 +61,7 @@ MODULE_LICENSE("GPL");
 #define INPORT_REG_MODE		0x07
 #define INPORT_RESET		0x80
 
-#ifdef CONFIG_INPUT_ATIXL
+#ifdef CONFIG_MOUSE_ATIXL
 #define INPORT_NAME		"ATI XL Mouse"
 #define INPORT_VENDOR		0x0002
 #define INPORT_SPEED_30HZ	0x01

drivers/input/mouse/pc110pad.c

@@ -113,7 +113,7 @@ static int __init pc110pad_init(void)
 	dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
 	if (dev) {
 		pci_dev_put(dev);
-		return -ENOENT;
+		return -ENODEV;
 	}
 
 	if (!request_region(pc110pad_io, 4, "pc110pad")) {

drivers/input/serio/i8042.c

@@ -371,7 +371,7 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id)
 	if (unlikely(i8042_suppress_kbd_ack))
 		if (port_no == I8042_KBD_PORT_NO &&
 		    (data == 0xfa || data == 0xfe)) {
-			i8042_suppress_kbd_ack = 0;
+			i8042_suppress_kbd_ack--;
 			goto out;
 		}
 
@@ -543,6 +543,7 @@ static int __devinit i8042_check_aux(void)
 {
 	int retval = -1;
 	int irq_registered = 0;
+	int aux_loop_broken = 0;
 	unsigned long flags;
 	unsigned char param;
 
@@ -572,6 +573,8 @@ static int __devinit i8042_check_aux(void)
 		if (i8042_command(&param, I8042_CMD_AUX_TEST) ||
 		    (param && param != 0xfa && param != 0xff))
 			return -1;
+
+		aux_loop_broken = 1;
 	}
 
 /*
@@ -595,7 +598,7 @@ static int __devinit i8042_check_aux(void)
  * used it for a PCI card or somethig else.
  */
 
-	if (i8042_noloop) {
+	if (i8042_noloop || aux_loop_broken) {
 /*
  * Without LOOP command we can't test AUX IRQ delivery. Assume the port
  * is working and hope we are right.
@@ -838,13 +841,14 @@ static long i8042_panic_blink(long count)
 	led ^= 0x01 | 0x04;
 	while (i8042_read_status() & I8042_STR_IBF)
 		DELAY;
-	i8042_suppress_kbd_ack = 1;
+	dbg("%02x -> i8042 (panic blink)", 0xed);
+	i8042_suppress_kbd_ack = 2;
 	i8042_write_data(0xed); /* set leds */
 	DELAY;
 	while (i8042_read_status() & I8042_STR_IBF)
 		DELAY;
 	DELAY;
-	i8042_suppress_kbd_ack = 1;
+	dbg("%02x -> i8042 (panic blink)", led);
 	i8042_write_data(led);
 	DELAY;
 	last_blink = count;

drivers/input/touchscreen/Kconfig

@@ -12,13 +12,18 @@ menuconfig INPUT_TOUCHSCREEN
 if INPUT_TOUCHSCREEN
 
 config TOUCHSCREEN_ADS7846
-	tristate "ADS 7846 based touchscreens"
+	tristate "ADS 7846/7843 based touchscreens"
 	depends on SPI_MASTER
+	depends on HWMON = n || HWMON
 	help
 	  Say Y here if you have a touchscreen interface using the
-	  ADS7846 controller, and your board-specific initialization
+	  ADS7846 or ADS7843 controller, and your board-specific setup
 	  code includes that in its table of SPI devices.
 
+	  If HWMON is selected, and the driver is told the reference voltage
+	  on your board, you will also get hwmon interfaces for the voltage
+	  (and on ads7846, temperature) sensors of this chip.
+
 	  If unsure, say N (but it's safe to say "Y").
 
 	  To compile this driver as a module, choose M here: the

drivers/input/touchscreen/ads7846.c

@@ -17,8 +17,9 @@
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  */
-#include <linux/device.h>
+#include <linux/hwmon.h>
 #include <linux/init.h>
+#include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
@@ -54,7 +55,8 @@
  * files.
  */
 
-#define	TS_POLL_PERIOD	msecs_to_jiffies(10)
+#define TS_POLL_DELAY	(1 * 1000000)	/* ns delay before the first sample */
+#define TS_POLL_PERIOD	(5 * 1000000)	/* ns delay between samples */
 
 /* this driver doesn't aim at the peak continuous sample rate */
 #define	SAMPLE_BITS	(8 /*cmd*/ + 16 /*sample*/ + 2 /* before, after */)
@@ -63,12 +65,12 @@ struct ts_event {
 	/* For portability, we can't read 12 bit values using SPI (which
 	 * would make the controller deliver them as native byteorder u16
 	 * with msbs zeroed).  Instead, we read them as two 8-bit values,
-	 * which need byteswapping then range adjustment.
+	 * *** WHICH NEED BYTESWAPPING *** and range adjustment.
 	 */
-	__be16 x;
-	__be16 y;
-	__be16 z1, z2;
-	int    ignore;
+	u16	x;
+	u16	y;
+	u16	z1, z2;
+	int	ignore;
 };
 
 struct ads7846 {
@@ -76,7 +78,12 @@ struct ads7846 {
 	char			phys[32];
 
 	struct spi_device	*spi;
+
+#if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE)
 	struct attribute_group	*attr_group;
+	struct class_device	*hwmon;
+#endif
+
 	u16			model;
 	u16			vref_delay_usecs;
 	u16			x_plate_ohms;
@@ -99,13 +106,16 @@ struct ads7846 {
 	u16			debounce_rep;
 
 	spinlock_t		lock;
-	struct timer_list	timer;		/* P: lock */
+	struct hrtimer		timer;
 	unsigned		pendown:1;	/* P: lock */
 	unsigned		pending:1;	/* P: lock */
 // FIXME remove "irq_disabled"
 	unsigned		irq_disabled:1;	/* P: lock */
 	unsigned		disabled:1;
 
+	int			(*filter)(void *data, int data_idx, int *val);
+	void			*filter_data;
+	void			(*filter_cleanup)(void *data);
 	int			(*get_pendown_state)(void);
 };
 
@@ -142,15 +152,16 @@ struct ads7846 {
 #define	MAX_12BIT	((1<<12)-1)
 
 /* leave ADC powered up (disables penirq) between differential samples */
-#define	READ_12BIT_DFR(x) (ADS_START | ADS_A2A1A0_d_ ## x \
-	| ADS_12_BIT | ADS_DFR)
+#define	READ_12BIT_DFR(x, adc, vref) (ADS_START | ADS_A2A1A0_d_ ## x \
+	| ADS_12_BIT | ADS_DFR | \
+	(adc ? ADS_PD10_ADC_ON : 0) | (vref ? ADS_PD10_REF_ON : 0))
 
-#define	READ_Y	(READ_12BIT_DFR(y)  | ADS_PD10_ADC_ON)
-#define	READ_Z1	(READ_12BIT_DFR(z1) | ADS_PD10_ADC_ON)
-#define	READ_Z2	(READ_12BIT_DFR(z2) | ADS_PD10_ADC_ON)
+#define	READ_Y(vref)	(READ_12BIT_DFR(y,  1, vref))
+#define	READ_Z1(vref)	(READ_12BIT_DFR(z1, 1, vref))
+#define	READ_Z2(vref)	(READ_12BIT_DFR(z2, 1, vref))
 
-#define	READ_X	(READ_12BIT_DFR(x)  | ADS_PD10_ADC_ON)
-#define	PWRDOWN	(READ_12BIT_DFR(y)  | ADS_PD10_PDOWN)	/* LAST */
+#define	READ_X(vref)	(READ_12BIT_DFR(x,  1, vref))
+#define	PWRDOWN		(READ_12BIT_DFR(y,  0, 0))	/* LAST */
 
 /* single-ended samples need to first power up reference voltage;
  * we leave both ADC and VREF powered
@@ -158,14 +169,19 @@ struct ads7846 {
 #define	READ_12BIT_SER(x) (ADS_START | ADS_A2A1A0_ ## x \
 	| ADS_12_BIT | ADS_SER)
 
-#define	REF_ON	(READ_12BIT_DFR(x) | ADS_PD10_ALL_ON)
-#define	REF_OFF	(READ_12BIT_DFR(y) | ADS_PD10_PDOWN)
+#define	REF_ON	(READ_12BIT_DFR(x, 1, 1))
+#define	REF_OFF	(READ_12BIT_DFR(y, 0, 0))
 
 /*--------------------------------------------------------------------------*/
 
 /*
  * Non-touchscreen sensors only use single-ended conversions.
+ * The range is GND..vREF. The ads7843 and ads7835 must use external vREF;
+ * ads7846 lets that pin be unconnected, to use internal vREF.
  */
+static unsigned vREF_mV;
+module_param(vREF_mV, uint, 0);
+MODULE_PARM_DESC(vREF_mV, "external vREF voltage, in milliVolts");
 
 struct ser_req {
 	u8			ref_on;
@@ -193,50 +209,55 @@ static int ads7846_read12_ser(struct device *dev, unsigned command)
 	struct ser_req		*req = kzalloc(sizeof *req, GFP_KERNEL);
 	int			status;
 	int			sample;
-	int			i;
+	int			use_internal;
 
 	if (!req)
 		return -ENOMEM;
 
 	spi_message_init(&req->msg);
 
-	/* activate reference, so it has time to settle; */
-	req->ref_on = REF_ON;
-	req->xfer[0].tx_buf = &req->ref_on;
-	req->xfer[0].len = 1;
-	req->xfer[1].rx_buf = &req->scratch;
-	req->xfer[1].len = 2;
-
-	/*
-	 * for external VREF, 0 usec (and assume it's always on);
-	 * for 1uF, use 800 usec;
-	 * no cap, 100 usec.
-	 */
-	req->xfer[1].delay_usecs = ts->vref_delay_usecs;
+	/* FIXME boards with ads7846 might use external vref instead ... */
+	use_internal = (ts->model == 7846);
+
+	/* maybe turn on internal vREF, and let it settle */
+	if (use_internal) {
+		req->ref_on = REF_ON;
+		req->xfer[0].tx_buf = &req->ref_on;
+		req->xfer[0].len = 1;
+		spi_message_add_tail(&req->xfer[0], &req->msg);
+
+		req->xfer[1].rx_buf = &req->scratch;
+		req->xfer[1].len = 2;
+
+		/* for 1uF, settle for 800 usec; no cap, 100 usec.  */
+		req->xfer[1].delay_usecs = ts->vref_delay_usecs;
+		spi_message_add_tail(&req->xfer[1], &req->msg);
+	}
 
 	/* take sample */
 	req->command = (u8) command;
 	req->xfer[2].tx_buf = &req->command;
 	req->xfer[2].len = 1;
+	spi_message_add_tail(&req->xfer[2], &req->msg);
+
 	req->xfer[3].rx_buf = &req->sample;
 	req->xfer[3].len = 2;
+	spi_message_add_tail(&req->xfer[3], &req->msg);
 
 	/* REVISIT:  take a few more samples, and compare ... */
 
-	/* turn off reference */
-	req->ref_off = REF_OFF;
-	req->xfer[4].tx_buf = &req->ref_off;
-	req->xfer[4].len = 1;
-	req->xfer[5].rx_buf = &req->scratch;
-	req->xfer[5].len = 2;
-
-	CS_CHANGE(req->xfer[5]);
-
-	/* group all the transfers together, so we can't interfere with
-	 * reading touchscreen state; disable penirq while sampling
-	 */
-	for (i = 0; i < 6; i++)
-		spi_message_add_tail(&req->xfer[i], &req->msg);
+	/* maybe off internal vREF */
+	if (use_internal) {
+		req->ref_off = REF_OFF;
+		req->xfer[4].tx_buf = &req->ref_off;
+		req->xfer[4].len = 1;
+		spi_message_add_tail(&req->xfer[4], &req->msg);
+
+		req->xfer[5].rx_buf = &req->scratch;
+		req->xfer[5].len = 2;
+		CS_CHANGE(req->xfer[5]);
+		spi_message_add_tail(&req->xfer[5], &req->msg);
+	}
 
 	ts->irq_disabled = 1;
 	disable_irq(spi->irq);
@@ -256,25 +277,173 @@ static int ads7846_read12_ser(struct device *dev, unsigned command)
 	return status ? status : sample;
 }
 
-#define SHOW(name) static ssize_t \
+#if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE)
+
+#define SHOW(name, var, adjust) static ssize_t \
 name ## _show(struct device *dev, struct device_attribute *attr, char *buf) \
 { \
+	struct ads7846 *ts = dev_get_drvdata(dev); \
 	ssize_t v = ads7846_read12_ser(dev, \
-			READ_12BIT_SER(name) | ADS_PD10_ALL_ON); \
+			READ_12BIT_SER(var) | ADS_PD10_ALL_ON); \
 	if (v < 0) \
 		return v; \
-	return sprintf(buf, "%u\n", (unsigned) v); \
+	return sprintf(buf, "%u\n", adjust(ts, v)); \
 } \
 static DEVICE_ATTR(name, S_IRUGO, name ## _show, NULL);
 
-SHOW(temp0)
-SHOW(temp1)
-SHOW(vaux)
-SHOW(vbatt)
+
+/* Sysfs conventions report temperatures in millidegrees Celcius.
+ * ADS7846 could use the low-accuracy two-sample scheme, but can't do the high
+ * accuracy scheme without calibration data.  For now we won't try either;
+ * userspace sees raw sensor values, and must scale/calibrate appropriately.
+ */
+static inline unsigned null_adjust(struct ads7846 *ts, ssize_t v)
+{
+	return v;
+}
+
+SHOW(temp0, temp0, null_adjust)		/* temp1_input */
+SHOW(temp1, temp1, null_adjust)		/* temp2_input */
+
+
+/* sysfs conventions report voltages in millivolts.  We can convert voltages
+ * if we know vREF.  userspace may need to scale vAUX to match the board's
+ * external resistors; we assume that vBATT only uses the internal ones.
+ */
+static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v)
+{
+	unsigned retval = v;
+
+	/* external resistors may scale vAUX into 0..vREF */
+	retval *= vREF_mV;
+	retval = retval >> 12;
+	return retval;
+}
+
+static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v)
+{
+	unsigned retval = vaux_adjust(ts, v);
+
+	/* ads7846 has a resistor ladder to scale this signal down */
+	if (ts->model == 7846)
+		retval *= 4;
+	return retval;
+}
+
+SHOW(in0_input, vaux, vaux_adjust)
+SHOW(in1_input, vbatt, vbatt_adjust)
+
+
+static struct attribute *ads7846_attributes[] = {
+	&dev_attr_temp0.attr,
+	&dev_attr_temp1.attr,
+	&dev_attr_in0_input.attr,
+	&dev_attr_in1_input.attr,
+	NULL,
+};
+
+static struct attribute_group ads7846_attr_group = {
+	.attrs = ads7846_attributes,
+};
+
+static struct attribute *ads7843_attributes[] = {
+	&dev_attr_in0_input.attr,
+	&dev_attr_in1_input.attr,
+	NULL,
+};
+
+static struct attribute_group ads7843_attr_group = {
+	.attrs = ads7843_attributes,
+};
+
+static struct attribute *ads7845_attributes[] = {
+	&dev_attr_in0_input.attr,
+	NULL,
+};
+
+static struct attribute_group ads7845_attr_group = {
+	.attrs = ads7845_attributes,
+};
+
+static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts)
+{
+	struct class_device *hwmon;
+	int err;
+
+	/* hwmon sensors need a reference voltage */
+	switch (ts->model) {
+	case 7846:
+		if (!vREF_mV) {
+			dev_dbg(&spi->dev, "assuming 2.5V internal vREF\n");
+			vREF_mV = 2500;
+		}
+		break;
+	case 7845:
+	case 7843:
+		if (!vREF_mV) {
+			dev_warn(&spi->dev,
+				"external vREF for ADS%d not specified\n",
+				ts->model);
+			return 0;
+		}
+		break;
+	}
+
+	/* different chips have different sensor groups */
+	switch (ts->model) {
+	case 7846:
+		ts->attr_group = &ads7846_attr_group;
+		break;
+	case 7845:
+		ts->attr_group = &ads7845_attr_group;
+		break;
+	case 7843:
+		ts->attr_group = &ads7843_attr_group;
+		break;
+	default:
+		dev_dbg(&spi->dev, "ADS%d not recognized\n", ts->model);
+		return 0;
+	}
+
+	err = sysfs_create_group(&spi->dev.kobj, ts->attr_group);
+	if (err)
+		return err;
+
+	hwmon = hwmon_device_register(&spi->dev);
+	if (IS_ERR(hwmon)) {
+		sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
+		return PTR_ERR(hwmon);
+	}
+
+	ts->hwmon = hwmon;
+	return 0;
+}
+
+static void ads784x_hwmon_unregister(struct spi_device *spi,
+				     struct ads7846 *ts)
+{
+	if (ts->hwmon) {
+		sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
+		hwmon_device_unregister(ts->hwmon);
+	}
+}
+
+#else
+static inline int ads784x_hwmon_register(struct spi_device *spi,
+					 struct ads7846 *ts)
+{
+	return 0;
+}
+
+static inline void ads784x_hwmon_unregister(struct spi_device *spi,
+					    struct ads7846 *ts)
+{
+}
+#endif
 
 static int is_pen_down(struct device *dev)
 {
-	struct ads7846		*ts = dev_get_drvdata(dev);
+	struct ads7846	*ts = dev_get_drvdata(dev);
 
 	return ts->pendown;
 }
@@ -318,46 +487,14 @@ static ssize_t ads7846_disable_store(struct device *dev,
 
 static DEVICE_ATTR(disable, 0664, ads7846_disable_show, ads7846_disable_store);
 
-static struct attribute *ads7846_attributes[] = {
-	&dev_attr_temp0.attr,
-	&dev_attr_temp1.attr,
-	&dev_attr_vbatt.attr,
-	&dev_attr_vaux.attr,
-	&dev_attr_pen_down.attr,
-	&dev_attr_disable.attr,
-	NULL,
-};
-
-static struct attribute_group ads7846_attr_group = {
-	.attrs = ads7846_attributes,
-};
-
-/*
- * ads7843/7845 don't have temperature sensors, and
- * use the other sensors a bit differently too
- */
-
-static struct attribute *ads7843_attributes[] = {
-	&dev_attr_vbatt.attr,
-	&dev_attr_vaux.attr,
+static struct attribute *ads784x_attributes[] = {
 	&dev_attr_pen_down.attr,
 	&dev_attr_disable.attr,
 	NULL,
 };
 
-static struct attribute_group ads7843_attr_group = {
-	.attrs = ads7843_attributes,
-};
-
-static struct attribute *ads7845_attributes[] = {
-	&dev_attr_vaux.attr,
-	&dev_attr_pen_down.attr,
-	&dev_attr_disable.attr,
-	NULL,
-};
-
-static struct attribute_group ads7845_attr_group = {
-	.attrs = ads7845_attributes,
+static struct attribute_group ads784x_attr_group = {
+	.attrs = ads784x_attributes,
 };
 
 /*--------------------------------------------------------------------------*/
@@ -373,25 +510,22 @@ static struct attribute_group ads7845_attr_group = {
 static void ads7846_rx(void *ads)
 {
 	struct ads7846		*ts = ads;
-	struct input_dev	*input_dev = ts->input;
 	unsigned		Rt;
-	unsigned		sync = 0;
 	u16			x, y, z1, z2;
-	unsigned long		flags;
 
-	/* adjust:  on-wire is a must-ignore bit, a BE12 value, then padding;
-	 * built from two 8 bit values written msb-first.
+	/* ads7846_rx_val() did in-place conversion (including byteswap) from
+	 * on-the-wire format as part of debouncing to get stable readings.
 	 */
-	x = (be16_to_cpu(ts->tc.x) >> 3) & 0x0fff;
-	y = (be16_to_cpu(ts->tc.y) >> 3) & 0x0fff;
-	z1 = (be16_to_cpu(ts->tc.z1) >> 3) & 0x0fff;
-	z2 = (be16_to_cpu(ts->tc.z2) >> 3) & 0x0fff;
+	x = ts->tc.x;
+	y = ts->tc.y;
+	z1 = ts->tc.z1;
+	z2 = ts->tc.z2;
 
 	/* range filtering */
 	if (x == MAX_12BIT)
 		x = 0;
 
-	if (likely(x && z1 && !device_suspended(&ts->spi->dev))) {
+	if (likely(x && z1)) {
 		/* compute touch pressure resistance using equation #2 */
 		Rt = z2;
 		Rt -= z1;
@@ -403,100 +537,129 @@ static void ads7846_rx(void *ads)
 		Rt = 0;
 
 	/* Sample found inconsistent by debouncing or pressure is beyond
-	* the maximum. Don't report it to user space, repeat at least
-	* once more the measurement */
+	 * the maximum. Don't report it to user space, repeat at least
+	 * once more the measurement
+	 */
 	if (ts->tc.ignore || Rt > ts->pressure_max) {
-		mod_timer(&ts->timer, jiffies + TS_POLL_PERIOD);
+#ifdef VERBOSE
+		pr_debug("%s: ignored %d pressure %d\n",
+			ts->spi->dev.bus_id, ts->tc.ignore, Rt);
+#endif
+		hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD),
+			      HRTIMER_REL);
 		return;
 	}
 
-	/* NOTE:  "pendown" is inferred from pressure; we don't rely on
-	 * being able to check nPENIRQ status, or "friendly" trigger modes
-	 * (both-edges is much better than just-falling or low-level).
+	/* NOTE: We can't rely on the pressure to determine the pen down
+	 * state, even this controller has a pressure sensor.  The pressure
+	 * value can fluctuate for quite a while after lifting the pen and
+	 * in some cases may not even settle at the expected value.
 	 *
-	 * REVISIT:  some boards may require reading nPENIRQ; it's
-	 * needed on 7843.  and 7845 reads pressure differently...
-	 *
-	 * REVISIT:  the touchscreen might not be connected; this code
-	 * won't notice that, even if nPENIRQ never fires ...
+	 * The only safe way to check for the pen up condition is in the
+	 * timer by reading the pen signal state (it's a GPIO _and_ IRQ).
 	 */
-	if (!ts->pendown && Rt != 0) {
-		input_report_key(input_dev, BTN_TOUCH, 1);
-		sync = 1;
-	} else if (ts->pendown && Rt == 0) {
-		input_report_key(input_dev, BTN_TOUCH, 0);
-		sync = 1;
-	}
-
 	if (Rt) {
-		input_report_abs(input_dev, ABS_X, x);
-		input_report_abs(input_dev, ABS_Y, y);
-		sync = 1;
-	}
-
-	if (sync) {
-		input_report_abs(input_dev, ABS_PRESSURE, Rt);
-		input_sync(input_dev);
-	}
+		struct input_dev *input = ts->input;
 
-#ifdef	VERBOSE
-	if (Rt || ts->pendown)
-		pr_debug("%s: %d/%d/%d%s\n", ts->spi->dev.bus_id,
-			x, y, Rt, Rt ? "" : " UP");
+		if (!ts->pendown) {
+			input_report_key(input, BTN_TOUCH, 1);
+			ts->pendown = 1;
+#ifdef VERBOSE
+			dev_dbg(&ts->spi->dev, "DOWN\n");
 #endif
+		}
+		input_report_abs(input, ABS_X, x);
+		input_report_abs(input, ABS_Y, y);
+		input_report_abs(input, ABS_PRESSURE, Rt);
 
-	spin_lock_irqsave(&ts->lock, flags);
-
-	ts->pendown = (Rt != 0);
-	mod_timer(&ts->timer, jiffies + TS_POLL_PERIOD);
+		input_sync(input);
+#ifdef VERBOSE
+		dev_dbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);
+#endif
+	}
 
-	spin_unlock_irqrestore(&ts->lock, flags);
+	hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD), HRTIMER_REL);
 }
 
-static void ads7846_debounce(void *ads)
+static int ads7846_debounce(void *ads, int data_idx, int *val)
 {
 	struct ads7846		*ts = ads;
-	struct spi_message	*m;
-	struct spi_transfer	*t;
-	int			val;
-	int			status;
 
-	m = &ts->msg[ts->msg_idx];
-	t = list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
-	val = (be16_to_cpu(*(__be16 *)t->rx_buf) >> 3) & 0x0fff;
-	if (!ts->read_cnt || (abs(ts->last_read - val) > ts->debounce_tol)) {
+	if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) {
+		/* Start over collecting consistent readings. */
+		ts->read_rep = 0;
 		/* Repeat it, if this was the first read or the read
 		 * wasn't consistent enough. */
 		if (ts->read_cnt < ts->debounce_max) {
-			ts->last_read = val;
+			ts->last_read = *val;
 			ts->read_cnt++;
+			return ADS7846_FILTER_REPEAT;
 		} else {
 			/* Maximum number of debouncing reached and still
 			 * not enough number of consistent readings. Abort
 			 * the whole sample, repeat it in the next sampling
 			 * period.
 			 */
-			ts->tc.ignore = 1;
 			ts->read_cnt = 0;
-			/* Last message will contain ads7846_rx() as the
-			 * completion function.
-			 */
-			m = ts->last_msg;
+			return ADS7846_FILTER_IGNORE;
 		}
-		/* Start over collecting consistent readings. */
-		ts->read_rep = 0;
 	} else {
 		if (++ts->read_rep > ts->debounce_rep) {
 			/* Got a good reading for this coordinate,
 			 * go for the next one. */
-			ts->tc.ignore = 0;
-			ts->msg_idx++;
 			ts->read_cnt = 0;
 			ts->read_rep = 0;
-			m++;
-		} else
+			return ADS7846_FILTER_OK;
+		} else {
 			/* Read more values that are consistent. */
 			ts->read_cnt++;
+			return ADS7846_FILTER_REPEAT;
+		}
+	}
+}
+
+static int ads7846_no_filter(void *ads, int data_idx, int *val)
+{
+	return ADS7846_FILTER_OK;
+}
+
+static void ads7846_rx_val(void *ads)
+{
+	struct ads7846 *ts = ads;
+	struct spi_message *m;
+	struct spi_transfer *t;
+	u16 *rx_val;
+	int val;
+	int action;
+	int status;
+
+	m = &ts->msg[ts->msg_idx];
+	t = list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
+	rx_val = t->rx_buf;
+
+	/* adjust:  on-wire is a must-ignore bit, a BE12 value, then padding;
+	 * built from two 8 bit values written msb-first.
+	 */
+	val = be16_to_cpu(*rx_val) >> 3;
+
+	action = ts->filter(ts->filter_data, ts->msg_idx, &val);
+	switch (action) {
+	case ADS7846_FILTER_REPEAT:
+		break;
+	case ADS7846_FILTER_IGNORE:
+		ts->tc.ignore = 1;
+		/* Last message will contain ads7846_rx() as the
+		 * completion function.
+		 */
+		m = ts->last_msg;
+		break;
+	case ADS7846_FILTER_OK:
+		*rx_val = val;
+		ts->tc.ignore = 0;
+		m = &ts->msg[++ts->msg_idx];
+		break;
+	default:
+		BUG();
 	}
 	status = spi_async(ts->spi, m);
 	if (status)
@@ -504,21 +667,34 @@ static void ads7846_debounce(void *ads)
 				status);
 }
 
-static void ads7846_timer(unsigned long handle)
+static int ads7846_timer(struct hrtimer *handle)
 {
-	struct ads7846	*ts = (void *)handle;
+	struct ads7846	*ts = container_of(handle, struct ads7846, timer);
 	int		status = 0;
 
 	spin_lock_irq(&ts->lock);
 
-	if (unlikely(ts->msg_idx && !ts->pendown)) {
+	if (unlikely(!ts->get_pendown_state() ||
+		     device_suspended(&ts->spi->dev))) {
+		if (ts->pendown) {
+			struct input_dev *input = ts->input;
+
+			input_report_key(input, BTN_TOUCH, 0);
+			input_report_abs(input, ABS_PRESSURE, 0);
+			input_sync(input);
+
+			ts->pendown = 0;
+#ifdef VERBOSE
+			dev_dbg(&ts->spi->dev, "UP\n");
+#endif
+		}
+
 		/* measurement cycle ended */
 		if (!device_suspended(&ts->spi->dev)) {
 			ts->irq_disabled = 0;
 			enable_irq(ts->spi->irq);
 		}
 		ts->pending = 0;
-		ts->msg_idx = 0;
 	} else {
 		/* pen is still down, continue with the measurement */
 		ts->msg_idx = 0;
@@ -528,6 +704,7 @@ static void ads7846_timer(unsigned long handle)
 	}
 
 	spin_unlock_irq(&ts->lock);
+	return HRTIMER_NORESTART;
 }
 
 static irqreturn_t ads7846_irq(int irq, void *handle)
@@ -546,7 +723,8 @@ static irqreturn_t ads7846_irq(int irq, void *handle)
 			ts->irq_disabled = 1;
 			disable_irq(ts->spi->irq);
 			ts->pending = 1;
-			mod_timer(&ts->timer, jiffies);
+			hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_DELAY),
+					HRTIMER_REL);
 		}
 	}
 	spin_unlock_irqrestore(&ts->lock, flags);
@@ -632,6 +810,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	struct ads7846_platform_data	*pdata = spi->dev.platform_data;
 	struct spi_message		*m;
 	struct spi_transfer		*x;
+	int				vref;
 	int				err;
 
 	if (!spi->irq) {
@@ -665,6 +844,10 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	 * may not.  So we stick to very-portable 8 bit words, both RX and TX.
 	 */
 	spi->bits_per_word = 8;
+	spi->mode = SPI_MODE_1;
+	err = spi_setup(spi);
+	if (err < 0)
+		return err;
 
 	ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL);
 	input_dev = input_allocate_device();
@@ -679,8 +862,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	ts->spi = spi;
 	ts->input = input_dev;
 
-	init_timer(&ts->timer);
-	ts->timer.data = (unsigned long) ts;
+	hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_REL);
 	ts->timer.function = ads7846_timer;
 
 	spin_lock_init(&ts->lock);
@@ -689,14 +871,25 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
 	ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
 	ts->pressure_max = pdata->pressure_max ? : ~0;
-	if (pdata->debounce_max) {
+
+	if (pdata->filter != NULL) {
+		if (pdata->filter_init != NULL) {
+			err = pdata->filter_init(pdata, &ts->filter_data);
+			if (err < 0)
+				goto err_free_mem;
+		}
+		ts->filter = pdata->filter;
+		ts->filter_cleanup = pdata->filter_cleanup;
+	} else if (pdata->debounce_max) {
 		ts->debounce_max = pdata->debounce_max;
+		if (ts->debounce_max < 2)
+			ts->debounce_max = 2;
 		ts->debounce_tol = pdata->debounce_tol;
 		ts->debounce_rep = pdata->debounce_rep;
-		if (ts->debounce_rep > ts->debounce_max + 1)
-			ts->debounce_rep = ts->debounce_max - 1;
+		ts->filter = ads7846_debounce;
+		ts->filter_data = ts;
 	} else
-		ts->debounce_tol = ~0;
+		ts->filter = ads7846_no_filter;
 	ts->get_pendown_state = pdata->get_pendown_state;
 
 	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", spi->dev.bus_id);
@@ -718,6 +911,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	input_set_abs_params(input_dev, ABS_PRESSURE,
 			pdata->pressure_min, pdata->pressure_max, 0, 0);
 
+	vref = pdata->keep_vref_on;
+
 	/* set up the transfers to read touchscreen state; this assumes we
 	 * use formula #2 for pressure, not #3.
 	 */
@@ -727,7 +922,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	spi_message_init(m);
 
 	/* y- still on; turn on only y+ (and ADC) */
-	ts->read_y = READ_Y;
+	ts->read_y = READ_Y(vref);
 	x->tx_buf = &ts->read_y;
 	x->len = 1;
 	spi_message_add_tail(x, m);
@@ -737,7 +932,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	x->len = 2;
 	spi_message_add_tail(x, m);
 
-	m->complete = ads7846_debounce;
+	m->complete = ads7846_rx_val;
 	m->context = ts;
 
 	m++;
@@ -745,7 +940,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 
 	/* turn y- off, x+ on, then leave in lowpower */
 	x++;
-	ts->read_x = READ_X;
+	ts->read_x = READ_X(vref);
 	x->tx_buf = &ts->read_x;
 	x->len = 1;
 	spi_message_add_tail(x, m);
@@ -755,7 +950,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	x->len = 2;
 	spi_message_add_tail(x, m);
 
-	m->complete = ads7846_debounce;
+	m->complete = ads7846_rx_val;
 	m->context = ts;
 
 	/* turn y+ off, x- on; we'll use formula #2 */
@@ -764,7 +959,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 		spi_message_init(m);
 
 		x++;
-		ts->read_z1 = READ_Z1;
+		ts->read_z1 = READ_Z1(vref);
 		x->tx_buf = &ts->read_z1;
 		x->len = 1;
 		spi_message_add_tail(x, m);
@@ -774,14 +969,14 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 		x->len = 2;
 		spi_message_add_tail(x, m);
 
-		m->complete = ads7846_debounce;
+		m->complete = ads7846_rx_val;
 		m->context = ts;
 
 		m++;
 		spi_message_init(m);
 
 		x++;
-		ts->read_z2 = READ_Z2;
+		ts->read_z2 = READ_Z2(vref);
 		x->tx_buf = &ts->read_z2;
 		x->len = 1;
 		spi_message_add_tail(x, m);
@@ -791,7 +986,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 		x->len = 2;
 		spi_message_add_tail(x, m);
 
-		m->complete = ads7846_debounce;
+		m->complete = ads7846_rx_val;
 		m->context = ts;
 	}
 
@@ -820,31 +1015,24 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 			spi->dev.driver->name, ts)) {
 		dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
 		err = -EBUSY;
-		goto err_free_mem;
+		goto err_cleanup_filter;
 	}
 
+	err = ads784x_hwmon_register(spi, ts);
+	if (err)
+		goto err_free_irq;
+
 	dev_info(&spi->dev, "touchscreen, irq %d\n", spi->irq);
 
-	/* take a first sample, leaving nPENIRQ active; avoid
+	/* take a first sample, leaving nPENIRQ active and vREF off; avoid
 	 * the touchscreen, in case it's not connected.
 	 */
 	(void) ads7846_read12_ser(&spi->dev,
 			  READ_12BIT_SER(vaux) | ADS_PD10_ALL_ON);
 
-	switch (ts->model) {
-	case 7846:
-		ts->attr_group = &ads7846_attr_group;
-		break;
-	case 7845:
-		ts->attr_group = &ads7845_attr_group;
-		break;
-	default:
-		ts->attr_group = &ads7843_attr_group;
-		break;
-	}
-	err = sysfs_create_group(&spi->dev.kobj, ts->attr_group);
+	err = sysfs_create_group(&spi->dev.kobj, &ads784x_attr_group);
 	if (err)
-		goto err_free_irq;
+		goto err_remove_hwmon;
 
 	err = input_register_device(input_dev);
 	if (err)
@@ -853,9 +1041,14 @@ static int __devinit ads7846_probe(struct spi_device *spi)
 	return 0;
 
  err_remove_attr_group:
-	sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
+	sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
+ err_remove_hwmon:
+	ads784x_hwmon_unregister(spi, ts);
  err_free_irq:
 	free_irq(spi->irq, ts);
+ err_cleanup_filter:
+	if (ts->filter_cleanup)
+		ts->filter_cleanup(ts->filter_data);
  err_free_mem:
 	input_free_device(input_dev);
 	kfree(ts);
@@ -866,16 +1059,20 @@ static int __devexit ads7846_remove(struct spi_device *spi)
 {
 	struct ads7846		*ts = dev_get_drvdata(&spi->dev);
 
+	ads784x_hwmon_unregister(spi, ts);
 	input_unregister_device(ts->input);
 
 	ads7846_suspend(spi, PMSG_SUSPEND);
 
-	sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
+	sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
 
 	free_irq(ts->spi->irq, ts);
 	/* suspend left the IRQ disabled */
 	enable_irq(ts->spi->irq);
 
+	if (ts->filter_cleanup)
+		ts->filter_cleanup(ts->filter_data);
+
 	kfree(ts);
 
 	dev_dbg(&spi->dev, "unregistered touchscreen\n");

drivers/input/tsdev.c

@@ -151,6 +151,10 @@ static int tsdev_open(struct inode *inode, struct file *file)
 	int i = iminor(inode) - TSDEV_MINOR_BASE;
 	struct tsdev_list *list;
 
+	printk(KERN_WARNING "tsdev (compaq touchscreen emulation) is scheduled "
+		"for removal.\nSee Documentation/feature-removal-schedule.txt "
+		"for details.\n");
+
 	if (i >= TSDEV_MINORS || !tsdev_table[i & TSDEV_MINOR_MASK])
 		return -ENODEV;
 

drivers/usb/input/hid-ff.c

@@ -57,6 +57,7 @@ static struct hid_ff_initializer inits[] = {
 	{ 0x46d, 0xc283, hid_lgff_init }, /* Logitech Wingman Force 3d */
 	{ 0x46d, 0xc295, hid_lgff_init }, /* Logitech MOMO force wheel */
 	{ 0x46d, 0xc219, hid_lgff_init }, /* Logitech Cordless rumble pad 2 */
+	{ 0x46d, 0xca03, hid_lgff_init }, /* Logitech MOMO force wheel */
 #endif
 #ifdef CONFIG_PANTHERLORD_FF
 	{ 0x810, 0x0001, hid_plff_init },

drivers/usb/input/hid-lgff.c

@@ -52,6 +52,7 @@ static const struct dev_type devices[] = {
 	{ 0x046d, 0xc211, ff_rumble },
 	{ 0x046d, 0xc219, ff_rumble },
 	{ 0x046d, 0xc283, ff_joystick },
+	{ 0x046d, 0xca03, ff_joystick },
 	{ 0x0000, 0x0000, ff_joystick }
 };
 

include/asm-arm/hardware/gpio_keys.h

+#ifndef _GPIO_KEYS_H
+#define _GPIO_KEYS_H
+
+struct gpio_keys_button {
+	/* Configuration parameters */
+	int keycode;
+	int gpio;
+	int active_low;
+	char *desc;
+};
+
+struct gpio_keys_platform_data {
+	struct gpio_keys_button *buttons;
+	int nbuttons;
+};
+
+#endif

include/linux/spi/ads7846.h

@@ -5,9 +5,17 @@
  *
  * It's OK if the min/max values are zero.
  */
+enum ads7846_filter {
+	ADS7846_FILTER_OK,
+	ADS7846_FILTER_REPEAT,
+	ADS7846_FILTER_IGNORE,
+};
+
 struct ads7846_platform_data {
 	u16	model;			/* 7843, 7845, 7846. */
 	u16	vref_delay_usecs;	/* 0 for external vref; etc */
+	int	keep_vref_on:1;		/* set to keep vref on for differential
+					 * measurements as well */
 	u16	x_plate_ohms;
 	u16	y_plate_ohms;
 
@@ -21,5 +29,9 @@ struct ads7846_platform_data {
 	u16	debounce_rep;		/* additional consecutive good readings
 					 * required after the first two */
 	int	(*get_pendown_state)(void);
+	int	(*filter_init)	(struct ads7846_platform_data *pdata,
+				 void **filter_data);
+	int	(*filter)	(void *filter_data, int data_idx, int *val);
+	void	(*filter_cleanup)(void *filter_data);
 };