Merge branch 'next' into for-linus

58 files changed, 1932 insertions, 392 deletions

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 88d8e4cb419..be0921ef6b5 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -41,6 +41,7 @@ struct evdev {
 struct evdev_client {
 	unsigned int head;
 	unsigned int tail;
+	unsigned int packet_head; /* [future] position of the first element of next packet */
 	spinlock_t buffer_lock; /* protects access to buffer, head and tail */
 	struct fasync_struct *fasync;
 	struct evdev *evdev;
@@ -72,12 +73,16 @@ static void evdev_pass_event(struct evdev_client *client,
 		client->buffer[client->tail].type = EV_SYN;
 		client->buffer[client->tail].code = SYN_DROPPED;
 		client->buffer[client->tail].value = 0;
-	}
 
-	spin_unlock(&client->buffer_lock);
+		client->packet_head = client->tail;
+	}
 
-	if (event->type == EV_SYN)
+	if (event->type == EV_SYN && event->code == SYN_REPORT) {
+		client->packet_head = client->head;
 		kill_fasync(&client->fasync, SIGIO, POLL_IN);
+	}
+
+	spin_unlock(&client->buffer_lock);
 }
 
 /*
@@ -159,7 +164,6 @@ static int evdev_grab(struct evdev *evdev, struct evdev_client *client)
 		return error;
 
 	rcu_assign_pointer(evdev->grab, client);
-	synchronize_rcu();
 
 	return 0;
 }
@@ -182,7 +186,6 @@ static void evdev_attach_client(struct evdev *evdev,
 	spin_lock(&evdev->client_lock);
 	list_add_tail_rcu(&client->node, &evdev->client_list);
 	spin_unlock(&evdev->client_lock);
-	synchronize_rcu();
 }
 
 static void evdev_detach_client(struct evdev *evdev,
@@ -387,12 +390,12 @@ static ssize_t evdev_read(struct file *file, char __user *buffer,
 	if (count < input_event_size())
 		return -EINVAL;
 
-	if (client->head == client->tail && evdev->exist &&
+	if (client->packet_head == client->tail && evdev->exist &&
 	    (file->f_flags & O_NONBLOCK))
 		return -EAGAIN;
 
 	retval = wait_event_interruptible(evdev->wait,
-		client->head != client->tail || !evdev->exist);
+		client->packet_head != client->tail || !evdev->exist);
 	if (retval)
 		return retval;
 
@@ -421,7 +424,7 @@ static unsigned int evdev_poll(struct file *file, poll_table *wait)
 	poll_wait(file, &evdev->wait, wait);
 
 	mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
-	if (client->head != client->tail)
+	if (client->packet_head != client->tail)
 		mask |= POLLIN | POLLRDNORM;
 
 	return mask;
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c
index 3037842a60d..b1aabde8752 100644
--- a/drivers/input/input-polldev.c
+++ b/drivers/input/input-polldev.c
@@ -13,6 +13,7 @@
 #include <linux/jiffies.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 #include <linux/input-polldev.h>
 
 MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
@@ -20,44 +21,6 @@ MODULE_DESCRIPTION("Generic implementation of a polled input device");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION("0.1");
 
-static DEFINE_MUTEX(polldev_mutex);
-static int polldev_users;
-static struct workqueue_struct *polldev_wq;
-
-static int input_polldev_start_workqueue(void)
-{
-	int retval;
-
-	retval = mutex_lock_interruptible(&polldev_mutex);
-	if (retval)
-		return retval;
-
-	if (!polldev_users) {
-		polldev_wq = create_singlethread_workqueue("ipolldevd");
-		if (!polldev_wq) {
-			pr_err("failed to create ipolldevd workqueue\n");
-			retval = -ENOMEM;
-			goto out;
-		}
-	}
-
-	polldev_users++;
-
- out:
-	mutex_unlock(&polldev_mutex);
-	return retval;
-}
-
-static void input_polldev_stop_workqueue(void)
-{
-	mutex_lock(&polldev_mutex);
-
-	if (!--polldev_users)
-		destroy_workqueue(polldev_wq);
-
-	mutex_unlock(&polldev_mutex);
-}
-
 static void input_polldev_queue_work(struct input_polled_dev *dev)
 {
 	unsigned long delay;
@@ -66,7 +29,7 @@ static void input_polldev_queue_work(struct input_polled_dev *dev)
 	if (delay >= HZ)
 		delay = round_jiffies_relative(delay);
 
-	queue_delayed_work(polldev_wq, &dev->work, delay);
+	queue_delayed_work(system_freezable_wq, &dev->work, delay);
 }
 
 static void input_polled_device_work(struct work_struct *work)
@@ -81,18 +44,13 @@ static void input_polled_device_work(struct work_struct *work)
 static int input_open_polled_device(struct input_dev *input)
 {
 	struct input_polled_dev *dev = input_get_drvdata(input);
-	int error;
-
-	error = input_polldev_start_workqueue();
-	if (error)
-		return error;
 
 	if (dev->open)
 		dev->open(dev);
 
 	/* Only start polling if polling is enabled */
 	if (dev->poll_interval > 0)
-		queue_delayed_work(polldev_wq, &dev->work, 0);
+		queue_delayed_work(system_freezable_wq, &dev->work, 0);
 
 	return 0;
 }
@@ -102,13 +60,6 @@ static void input_close_polled_device(struct input_dev *input)
 	struct input_polled_dev *dev = input_get_drvdata(input);
 
 	cancel_delayed_work_sync(&dev->work);
-	/*
-	 * Clean up work struct to remove references to the workqueue.
-	 * It may be destroyed by the next call. This causes problems
-	 * at next device open-close in case of poll_interval == 0.
-	 */
-	INIT_DELAYED_WORK(&dev->work, dev->work.work.func);
-	input_polldev_stop_workqueue();
 
 	if (dev->close)
 		dev->close(dev);
@@ -295,4 +246,3 @@ void input_unregister_polled_device(struct input_polled_dev *dev)
 	input_unregister_device(dev->input);
 }
 EXPORT_SYMBOL(input_unregister_polled_device);
-
diff --git a/drivers/input/input.c b/drivers/input/input.c
index ebbceedc92f..75e11c7b70f 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -451,7 +451,6 @@ int input_grab_device(struct input_handle *handle)
 	}
 
 	rcu_assign_pointer(dev->grab, handle);
-	synchronize_rcu();
 
  out:
 	mutex_unlock(&dev->mutex);
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 3182c9cd1b0..c24ec2d5f92 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -180,7 +180,6 @@ static void joydev_attach_client(struct joydev *joydev,
 	spin_lock(&joydev->client_lock);
 	list_add_tail_rcu(&client->node, &joydev->client_list);
 	spin_unlock(&joydev->client_lock);
-	synchronize_rcu();
 }
 
 static void joydev_detach_client(struct joydev *joydev,
@@ -758,7 +757,7 @@ static void joydev_remove_chrdev(struct joydev *joydev)
 }
 
 /*
- * Mark device non-existant. This disables writes, ioctls and
+ * Mark device non-existent. This disables writes, ioctls and
  * prevents new users from opening the device. Already posted
  * blocking reads will stay, however new ones will fail.
  */
@@ -777,7 +776,7 @@ static void joydev_cleanup(struct joydev *joydev)
 	joydev_hangup(joydev);
 	joydev_remove_chrdev(joydev);
 
-	/* joydev is marked dead so noone else accesses joydev->open */
+	/* joydev is marked dead so no one else accesses joydev->open */
 	if (joydev->open)
 		input_close_device(handle);
 }
diff --git a/drivers/input/joystick/a3d.c b/drivers/input/joystick/a3d.c
index d259b41354b..1639ab2b94b 100644
--- a/drivers/input/joystick/a3d.c
+++ b/drivers/input/joystick/a3d.c
@@ -3,7 +3,7 @@
  */
 
 /*
- * FP-Gaming Assasin 3D joystick driver for Linux
+ * FP-Gaming Assassin 3D joystick driver for Linux
  */
 
 /*
@@ -34,7 +34,7 @@
 #include <linux/input.h>
 #include <linux/jiffies.h>
 
-#define DRIVER_DESC	"FP-Gaming Assasin 3D joystick driver"
+#define DRIVER_DESC	"FP-Gaming Assassin 3D joystick driver"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index b16bed038f7..69badb4e06a 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -32,6 +32,16 @@ config KEYBOARD_ADP5588
 	  To compile this driver as a module, choose M here: the
 	  module will be called adp5588-keys.
 
+config KEYBOARD_ADP5589
+	tristate "ADP5589 I2C QWERTY Keypad and IO Expander"
+	depends on I2C
+	help
+	  Say Y here if you want to use a ADP5589 attached to your
+	  system I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called adp5589-keys.
+
 config KEYBOARD_AMIGA
 	tristate "Amiga keyboard"
 	depends on AMIGA
@@ -325,6 +335,18 @@ config KEYBOARD_MCS
 	  To compile this driver as a module, choose M here: the
 	  module will be called mcs_touchkey.
 
+config KEYBOARD_MPR121
+	tristate "Freescale MPR121 Touchkey"
+	depends on I2C
+	help
+	  Say Y here if you have Freescale MPR121 touchkey controller
+	  chip in your system.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mpr121_touchkey.
+
 config KEYBOARD_IMX
 	tristate "IMX keypad support"
 	depends on ARCH_MXC
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 878e6c20deb..c49cf8e04cd 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -6,6 +6,7 @@
 
 obj-$(CONFIG_KEYBOARD_ADP5520)		+= adp5520-keys.o
 obj-$(CONFIG_KEYBOARD_ADP5588)		+= adp5588-keys.o
+obj-$(CONFIG_KEYBOARD_ADP5589)		+= adp5589-keys.o
 obj-$(CONFIG_KEYBOARD_AMIGA)		+= amikbd.o
 obj-$(CONFIG_KEYBOARD_ATARI)		+= atakbd.o
 obj-$(CONFIG_KEYBOARD_ATKBD)		+= atkbd.o
@@ -27,6 +28,7 @@ obj-$(CONFIG_KEYBOARD_MAPLE)		+= maple_keyb.o
 obj-$(CONFIG_KEYBOARD_MATRIX)		+= matrix_keypad.o
 obj-$(CONFIG_KEYBOARD_MAX7359)		+= max7359_keypad.o
 obj-$(CONFIG_KEYBOARD_MCS)		+= mcs_touchkey.o
+obj-$(CONFIG_KEYBOARD_MPR121)		+= mpr121_touchkey.o
 obj-$(CONFIG_KEYBOARD_NEWTON)		+= newtonkbd.o
 obj-$(CONFIG_KEYBOARD_NOMADIK)		+= nomadik-ske-keypad.o
 obj-$(CONFIG_KEYBOARD_OMAP)		+= omap-keypad.o
diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c
new file mode 100644
index 00000000000..631598663aa
--- /dev/null
+++ b/drivers/input/keyboard/adp5589-keys.c
@@ -0,0 +1,771 @@
+/*
+ * Description:  keypad driver for ADP5589
+ *		 I2C QWERTY Keypad and IO Expander
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2010-2011 Analog Devices Inc.
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/workqueue.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#include <linux/input/adp5589.h>
+
+/* GENERAL_CFG Register */
+#define OSC_EN		(1 << 7)
+#define CORE_CLK(x)	(((x) & 0x3) << 5)
+#define LCK_TRK_LOGIC	(1 << 4)
+#define LCK_TRK_GPI	(1 << 3)
+#define INT_CFG		(1 << 1)
+#define RST_CFG		(1 << 0)
+
+/* INT_EN Register */
+#define LOGIC2_IEN	(1 << 5)
+#define LOGIC1_IEN	(1 << 4)
+#define LOCK_IEN	(1 << 3)
+#define OVRFLOW_IEN	(1 << 2)
+#define GPI_IEN		(1 << 1)
+#define EVENT_IEN	(1 << 0)
+
+/* Interrupt Status Register */
+#define LOGIC2_INT	(1 << 5)
+#define LOGIC1_INT	(1 << 4)
+#define LOCK_INT	(1 << 3)
+#define OVRFLOW_INT	(1 << 2)
+#define GPI_INT		(1 << 1)
+#define EVENT_INT	(1 << 0)
+
+/* STATUS Register */
+
+#define LOGIC2_STAT	(1 << 7)
+#define LOGIC1_STAT	(1 << 6)
+#define LOCK_STAT	(1 << 5)
+#define KEC		0xF
+
+/* PIN_CONFIG_D Register */
+#define C4_EXTEND_CFG	(1 << 6)	/* RESET2 */
+#define R4_EXTEND_CFG	(1 << 5)	/* RESET1 */
+
+/* LOCK_CFG */
+#define LOCK_EN		(1 << 0)
+
+#define PTIME_MASK	0x3
+#define LTIME_MASK	0x3
+
+/* Key Event Register xy */
+#define KEY_EV_PRESSED		(1 << 7)
+#define KEY_EV_MASK		(0x7F)
+
+#define KEYP_MAX_EVENT		16
+
+#define MAXGPIO			19
+#define ADP_BANK(offs)		((offs) >> 3)
+#define ADP_BIT(offs)		(1u << ((offs) & 0x7))
+
+struct adp5589_kpad {
+	struct i2c_client *client;
+	struct input_dev *input;
+	unsigned short keycode[ADP5589_KEYMAPSIZE];
+	const struct adp5589_gpi_map *gpimap;
+	unsigned short gpimapsize;
+	unsigned extend_cfg;
+#ifdef CONFIG_GPIOLIB
+	unsigned char gpiomap[MAXGPIO];
+	bool export_gpio;
+	struct gpio_chip gc;
+	struct mutex gpio_lock;	/* Protect cached dir, dat_out */
+	u8 dat_out[3];
+	u8 dir[3];
+#endif
+};
+
+static int adp5589_read(struct i2c_client *client, u8 reg)
+{
+	int ret = i2c_smbus_read_byte_data(client, reg);
+
+	if (ret < 0)
+		dev_err(&client->dev, "Read Error\n");
+
+	return ret;
+}
+
+static int adp5589_write(struct i2c_client *client, u8 reg, u8 val)
+{
+	return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+#ifdef CONFIG_GPIOLIB
+static int adp5589_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	return !!(adp5589_read(kpad->client, ADP5589_GPI_STATUS_A + bank) &
+		  bit);
+}
+
+static void adp5589_gpio_set_value(struct gpio_chip *chip,
+				   unsigned off, int val)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	mutex_lock(&kpad->gpio_lock);
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+		      kpad->dat_out[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5589_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] &= ~bit;
+	ret = adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+			    kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int adp5589_gpio_direction_output(struct gpio_chip *chip,
+					 unsigned off, int val)
+{
+	struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] |= bit;
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	ret = adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+			    kpad->dat_out[bank]);
+	ret |= adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+			     kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int __devinit adp5589_build_gpiomap(struct adp5589_kpad *kpad,
+				const struct adp5589_kpad_platform_data *pdata)
+{
+	bool pin_used[MAXGPIO];
+	int n_unused = 0;
+	int i;
+
+	memset(pin_used, false, sizeof(pin_used));
+
+	for (i = 0; i < MAXGPIO; i++)
+		if (pdata->keypad_en_mask & (1 << i))
+			pin_used[i] = true;
+
+	for (i = 0; i < kpad->gpimapsize; i++)
+		pin_used[kpad->gpimap[i].pin - ADP5589_GPI_PIN_BASE] = true;
+
+	if (kpad->extend_cfg & R4_EXTEND_CFG)
+		pin_used[4] = true;
+
+	if (kpad->extend_cfg & C4_EXTEND_CFG)
+		pin_used[12] = true;
+
+	for (i = 0; i < MAXGPIO; i++)
+		if (!pin_used[i])
+			kpad->gpiomap[n_unused++] = i;
+
+	return n_unused;
+}
+
+static int __devinit adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int i, error;
+
+	if (!gpio_data)
+		return 0;
+
+	kpad->gc.ngpio = adp5589_build_gpiomap(kpad, pdata);
+	if (kpad->gc.ngpio == 0) {
+		dev_info(dev, "No unused gpios left to export\n");
+		return 0;
+	}
+
+	kpad->export_gpio = true;
+
+	kpad->gc.direction_input = adp5589_gpio_direction_input;
+	kpad->gc.direction_output = adp5589_gpio_direction_output;
+	kpad->gc.get = adp5589_gpio_get_value;
+	kpad->gc.set = adp5589_gpio_set_value;
+	kpad->gc.can_sleep = 1;
+
+	kpad->gc.base = gpio_data->gpio_start;
+	kpad->gc.label = kpad->client->name;
+	kpad->gc.owner = THIS_MODULE;
+
+	mutex_init(&kpad->gpio_lock);
+
+	error = gpiochip_add(&kpad->gc);
+	if (error) {
+		dev_err(dev, "gpiochip_add failed, err: %d\n", error);
+		return error;
+	}
+
+	for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+		kpad->dat_out[i] = adp5589_read(kpad->client,
+						ADP5589_GPO_DATA_OUT_A + i);
+		kpad->dir[i] = adp5589_read(kpad->client,
+					    ADP5589_GPIO_DIRECTION_A + i);
+	}
+
+	if (gpio_data->setup) {
+		error = gpio_data->setup(kpad->client,
+					 kpad->gc.base, kpad->gc.ngpio,
+					 gpio_data->context);
+		if (error)
+			dev_warn(dev, "setup failed, %d\n", error);
+	}
+
+	return 0;
+}
+
+static void __devexit adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int error;
+
+	if (!kpad->export_gpio)
+		return;
+
+	if (gpio_data->teardown) {
+		error = gpio_data->teardown(kpad->client,
+					    kpad->gc.base, kpad->gc.ngpio,
+					    gpio_data->context);
+		if (error)
+			dev_warn(dev, "teardown failed %d\n", error);
+	}
+
+	error = gpiochip_remove(&kpad->gc);
+	if (error)
+		dev_warn(dev, "gpiochip_remove failed %d\n", error);
+}
+#else
+static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+	return 0;
+}
+
+static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+}
+#endif
+
+static void adp5589_report_switches(struct adp5589_kpad *kpad,
+				    int key, int key_val)
+{
+	int i;
+
+	for (i = 0; i < kpad->gpimapsize; i++) {
+		if (key_val == kpad->gpimap[i].pin) {
+			input_report_switch(kpad->input,
+					    kpad->gpimap[i].sw_evt,
+					    key & KEY_EV_PRESSED);
+			break;
+		}
+	}
+}
+
+static void adp5589_report_events(struct adp5589_kpad *kpad, int ev_cnt)
+{
+	int i;
+
+	for (i = 0; i < ev_cnt; i++) {
+		int key = adp5589_read(kpad->client, ADP5589_FIFO_1 + i);
+