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: update multi-touch protocol documentation
  Input: add the ABS_MT_PRESSURE event
  Input: winbond-cir - remove dmesg spam
  Input: lifebook - add another Lifebook DMI signature
  Input: ad7879 - support auxiliary GPIOs via gpiolib

Documentation/input/multi-touch-protocol.txt

@@ -27,12 +27,30 @@ set of events/packets.
 
 A set of ABS_MT events with the desired properties is defined. The events
 are divided into categories, to allow for partial implementation.  The
-minimum set consists of ABS_MT_TOUCH_MAJOR, ABS_MT_POSITION_X and
-ABS_MT_POSITION_Y, which allows for multiple fingers to be tracked.  If the
-device supports it, the ABS_MT_WIDTH_MAJOR may be used to provide the size
-of the approaching finger. Anisotropy and direction may be specified with
-ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MINOR and ABS_MT_ORIENTATION.  The
-ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a
+minimum set consists of ABS_MT_POSITION_X and ABS_MT_POSITION_Y, which
+allows for multiple fingers to be tracked.  If the device supports it, the
+ABS_MT_TOUCH_MAJOR and ABS_MT_WIDTH_MAJOR may be used to provide the size
+of the contact area and approaching finger, respectively.
+
+The TOUCH and WIDTH parameters have a geometrical interpretation; imagine
+looking through a window at someone gently holding a finger against the
+glass.  You will see two regions, one inner region consisting of the part
+of the finger actually touching the glass, and one outer region formed by
+the perimeter of the finger. The diameter of the inner region is the
+ABS_MT_TOUCH_MAJOR, the diameter of the outer region is
+ABS_MT_WIDTH_MAJOR. Now imagine the person pressing the finger harder
+against the glass. The inner region will increase, and in general, the
+ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR, which is always smaller than
+unity, is related to the finger pressure. For pressure-based devices,
+ABS_MT_PRESSURE may be used to provide the pressure on the contact area
+instead.
+
+In addition to the MAJOR parameters, the oval shape of the finger can be
+described by adding the MINOR parameters, such that MAJOR and MINOR are the
+major and minor axis of an ellipse. Finally, the orientation of the oval
+shape can be describe with the ORIENTATION parameter.
+
+The ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a
 finger or a pen or something else.  Devices with more granular information
 may specify general shapes as blobs, i.e., as a sequence of rectangular
 shapes grouped together by an ABS_MT_BLOB_ID. Finally, for the few devices
@@ -42,11 +60,9 @@ report finger tracking from hardware [5].
 Here is what a minimal event sequence for a two-finger touch would look
 like:
 
-   ABS_MT_TOUCH_MAJOR
    ABS_MT_POSITION_X
    ABS_MT_POSITION_Y
    SYN_MT_REPORT
-   ABS_MT_TOUCH_MAJOR
    ABS_MT_POSITION_X
    ABS_MT_POSITION_Y
    SYN_MT_REPORT
@@ -87,6 +103,12 @@ the contact. The ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR approximates
 the notion of pressure. The fingers of the hand and the palm all have
 different characteristic widths [1].
 
+ABS_MT_PRESSURE
+
+The pressure, in arbitrary units, on the contact area. May be used instead
+of TOUCH and WIDTH for pressure-based devices or any device with a spatial
+signal intensity distribution.
+
 ABS_MT_ORIENTATION
 
 The orientation of the ellipse. The value should describe a signed quarter
@@ -170,6 +192,16 @@ There are a few devices that support trackingID in hardware. User space can
 make use of these native identifiers to reduce bandwidth and cpu usage.
 
 
+Gestures
+--------
+
+In the specific application of creating gesture events, the TOUCH and WIDTH
+parameters can be used to, e.g., approximate finger pressure or distinguish
+between index finger and thumb. With the addition of the MINOR parameters,
+one can also distinguish between a sweeping finger and a pointing finger,
+and with ORIENTATION, one can detect twisting of fingers.
+
+
 Notes
 -----
 

drivers/input/input.c

@@ -46,6 +46,7 @@ static unsigned int input_abs_bypass_init_data[] __initdata = {
 	ABS_MT_TOOL_TYPE,
 	ABS_MT_BLOB_ID,
 	ABS_MT_TRACKING_ID,
+	ABS_MT_PRESSURE,
 	0
 };
 static unsigned long input_abs_bypass[BITS_TO_LONGS(ABS_CNT)];

drivers/input/misc/winbond-cir.c

@@ -768,7 +768,7 @@ wbcir_parse_rc6(struct device *dev, struct wbcir_data *data)
 		return;
 	}
 
-	dev_info(dev, "IR-RC6 ad 0x%02X cm 0x%02X cu 0x%04X "
+	dev_dbg(dev, "IR-RC6 ad 0x%02X cm 0x%02X cu 0x%04X "
 		"toggle %u mode %u scan 0x%08X\n",
 		address,
 		command,

drivers/input/mouse/lifebook.c

@@ -50,6 +50,12 @@ static const struct dmi_system_id __initconst lifebook_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
 		},
 	},
+	{
+		/* LifeBook B */
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_NAME, "Lifebook B Series"),
+		},
+	},
 	{
 		/* LifeBook B */
 		.matches = {

drivers/input/touchscreen/ad7879.c

@@ -47,6 +47,7 @@
 #include <linux/workqueue.h>
 #include <linux/spi/spi.h>
 #include <linux/i2c.h>
+#include <linux/gpio.h>
 
 #include <linux/spi/ad7879.h>
 
@@ -132,7 +133,9 @@ struct ad7879 {
 	struct input_dev	*input;
 	struct work_struct	work;
 	struct timer_list	timer;
-
+#ifdef CONFIG_GPIOLIB
+	struct gpio_chip	gc;
+#endif
 	struct mutex		mutex;
 	unsigned		disabled:1;	/* P: mutex */
 
@@ -150,11 +153,9 @@ struct ad7879 {
 	u8			median;
 	u16			x_plate_ohms;
 	u16			pressure_max;
-	u16			gpio_init;
 	u16			cmd_crtl1;
 	u16			cmd_crtl2;
 	u16			cmd_crtl3;
-	unsigned		gpio:1;
 };
 
 static int ad7879_read(bus_device *, u8);
@@ -237,24 +238,6 @@ static irqreturn_t ad7879_irq(int irq, void *handle)
 
 static void ad7879_setup(struct ad7879 *ts)
 {
-	ts->cmd_crtl3 = AD7879_YPLUS_BIT |
-			AD7879_XPLUS_BIT |
-			AD7879_Z2_BIT |
-			AD7879_Z1_BIT |
-			AD7879_TEMPMASK_BIT |
-			AD7879_AUXVBATMASK_BIT |
-			AD7879_GPIOALERTMASK_BIT;
-
-	ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR |
-			AD7879_AVG(ts->averaging) |
-			AD7879_MFS(ts->median) |
-			AD7879_FCD(ts->first_conversion_delay) |
-			ts->gpio_init;
-
-	ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 |
-			AD7879_ACQ(ts->acquisition_time) |
-			AD7879_TMR(ts->pen_down_acc_interval);
-
 	ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
 	ad7879_write(ts->bus, AD7879_REG_CTRL3, ts->cmd_crtl3);
 	ad7879_write(ts->bus, AD7879_REG_CTRL1, ts->cmd_crtl1);
@@ -324,48 +307,132 @@ static ssize_t ad7879_disable_store(struct device *dev,
 
 static DEVICE_ATTR(disable, 0664, ad7879_disable_show, ad7879_disable_store);
 
-static ssize_t ad7879_gpio_show(struct device *dev,
-				     struct device_attribute *attr, char *buf)
+static struct attribute *ad7879_attributes[] = {
+	&dev_attr_disable.attr,
+	NULL
+};
+
+static const struct attribute_group ad7879_attr_group = {
+	.attrs = ad7879_attributes,
+};
+
+#ifdef CONFIG_GPIOLIB
+static int ad7879_gpio_direction_input(struct gpio_chip *chip,
+					unsigned gpio)
 {
-	struct ad7879 *ts = dev_get_drvdata(dev);
+	struct ad7879 *ts = container_of(chip, struct ad7879, gc);
+	int err;
 
-	return sprintf(buf, "%u\n", ts->gpio);
+	mutex_lock(&ts->mutex);
+	ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL;
+	err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+	mutex_unlock(&ts->mutex);
+
+	return err;
 }
 
-static ssize_t ad7879_gpio_store(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t count)
+static int ad7879_gpio_direction_output(struct gpio_chip *chip,
+					unsigned gpio, int level)
 {
-	struct ad7879 *ts = dev_get_drvdata(dev);
-	unsigned long val;
-	int error;
+	struct ad7879 *ts = container_of(chip, struct ad7879, gc);
+	int err;
 
-	error = strict_strtoul(buf, 10, &val);
-	if (error)
-		return error;
+	mutex_lock(&ts->mutex);
+	ts->cmd_crtl2 &= ~AD7879_GPIODIR;
+	ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIOPOL;
+	if (level)
+		ts->cmd_crtl2 |= AD7879_GPIO_DATA;
+	else
+		ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
+
+	err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+	mutex_unlock(&ts->mutex);
+
+	return err;
+}
+
+static int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ad7879 *ts = container_of(chip, struct ad7879, gc);
+	u16 val;
 
 	mutex_lock(&ts->mutex);
-	ts->gpio = !!val;
-	error = ad7879_write(ts->bus, AD7879_REG_CTRL2,
-			   ts->gpio ?
-				ts->cmd_crtl2 & ~AD7879_GPIO_DATA :
-				ts->cmd_crtl2 | AD7879_GPIO_DATA);
+	val = ad7879_read(ts->bus, AD7879_REG_CTRL2);
 	mutex_unlock(&ts->mutex);
 
-	return error ? : count;
+	return !!(val & AD7879_GPIO_DATA);
 }
 
-static DEVICE_ATTR(gpio, 0664, ad7879_gpio_show, ad7879_gpio_store);
+static void ad7879_gpio_set_value(struct gpio_chip *chip,
+				  unsigned gpio, int value)
+{
+	struct ad7879 *ts = container_of(chip, struct ad7879, gc);
 
-static struct attribute *ad7879_attributes[] = {
-	&dev_attr_disable.attr,
-	&dev_attr_gpio.attr,
-	NULL
-};
+	mutex_lock(&ts->mutex);
+	if (value)
+		ts->cmd_crtl2 |= AD7879_GPIO_DATA;
+	else
+		ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
 
-static const struct attribute_group ad7879_attr_group = {
-	.attrs = ad7879_attributes,
-};
+	ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
+	mutex_unlock(&ts->mutex);
+}
+
+static int __devinit ad7879_gpio_add(struct device *dev)
+{
+	struct ad7879 *ts = dev_get_drvdata(dev);
+	struct ad7879_platform_data *pdata = dev->platform_data;
+	int ret = 0;
+
+	if (pdata->gpio_export) {
+		ts->gc.direction_input = ad7879_gpio_direction_input;
+		ts->gc.direction_output = ad7879_gpio_direction_output;
+		ts->gc.get = ad7879_gpio_get_value;
+		ts->gc.set = ad7879_gpio_set_value;
+		ts->gc.can_sleep = 1;
+		ts->gc.base = pdata->gpio_base;
+		ts->gc.ngpio = 1;
+		ts->gc.label = "AD7879-GPIO";
+		ts->gc.owner = THIS_MODULE;
+		ts->gc.dev = dev;
+
+		ret = gpiochip_add(&ts->gc);
+		if (ret)
+			dev_err(dev, "failed to register gpio %d\n",
+				ts->gc.base);
+	}
+
+	return ret;
+}
+
+/*
+ * We mark ad7879_gpio_remove inline so there is a chance the code
+ * gets discarded when not needed. We can't do __devinit/__devexit
+ * markup since it is used in both probe and remove methods.
+ */
+static inline void ad7879_gpio_remove(struct device *dev)
+{
+	struct ad7879 *ts = dev_get_drvdata(dev);
+	struct ad7879_platform_data *pdata = dev->platform_data;
+	int ret;
+
+	if (pdata->gpio_export) {
+		ret = gpiochip_remove(&ts->gc);
+		if (ret)
+			dev_err(dev, "failed to remove gpio %d\n",
+				ts->gc.base);
+	}
+}
+#else
+static inline int ad7879_gpio_add(struct device *dev)
+{
+	return 0;
+}
+
+static inline void ad7879_gpio_remove(struct device *dev)
+{
+}
+#endif
 
 static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
 {
@@ -403,12 +470,6 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
 	ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
 	ts->median = pdata->median;
 
-	if (pdata->gpio_output)
-		ts->gpio_init = AD7879_GPIO_EN |
-				(pdata->gpio_default ? 0 : AD7879_GPIO_DATA);
-	else
-		ts->gpio_init = AD7879_GPIO_EN | AD7879_GPIODIR;
-
 	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&bus->dev));
 
 	input_dev->name = "AD7879 Touchscreen";
@@ -446,6 +507,23 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
 		goto err_free_mem;
 	}
 
+	ts->cmd_crtl3 = AD7879_YPLUS_BIT |
+			AD7879_XPLUS_BIT |
+			AD7879_Z2_BIT |
+			AD7879_Z1_BIT |
+			AD7879_TEMPMASK_BIT |
+			AD7879_AUXVBATMASK_BIT |
+			AD7879_GPIOALERTMASK_BIT;
+
+	ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR |
+			AD7879_AVG(ts->averaging) |
+			AD7879_MFS(ts->median) |
+			AD7879_FCD(ts->first_conversion_delay);
+
+	ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 |
+			AD7879_ACQ(ts->acquisition_time) |
+			AD7879_TMR(ts->pen_down_acc_interval);
+
 	ad7879_setup(ts);
 
 	err = request_irq(bus->irq, ad7879_irq,
@@ -460,15 +538,21 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
 	if (err)
 		goto err_free_irq;
 
-	err = input_register_device(input_dev);
+	err = ad7879_gpio_add(&bus->dev);
 	if (err)
 		goto err_remove_attr;
 
+	err = input_register_device(input_dev);
+	if (err)
+		goto err_remove_gpio;
+
 	dev_info(&bus->dev, "Rev.%d touchscreen, irq %d\n",
 		 revid >> 8, bus->irq);
 
 	return 0;
 
+err_remove_gpio:
+	ad7879_gpio_remove(&bus->dev);
 err_remove_attr:
 	sysfs_remove_group(&bus->dev.kobj, &ad7879_attr_group);
 err_free_irq:
@@ -481,6 +565,7 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
 
 static int __devexit ad7879_destroy(bus_device *bus, struct ad7879 *ts)
 {
+	ad7879_gpio_remove(&bus->dev);
 	ad7879_disable(ts);
 	sysfs_remove_group(&ts->bus->dev.kobj, &ad7879_attr_group);
 	free_irq(ts->bus->irq, ts);