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

Pull input updates from Dmitry Torokhov:

 - an update to Elan touchpad SMBus driver to fetch device parameters
   (size, resolution) while it is still in PS/2 mode, before switching
   over to SMBus, as in that mode some devices return garbage dimensions

 - update to iforce joystick driver

 - miscellaneous driver fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (48 commits)
  Input: gpio_keys_polled - allow specifying name of input device
  Input: edt-ft5x06 - simplify event reporting code
  Input: max77650-onkey - add MODULE_ALIAS()
  Input: atmel_mxt_ts - fix leak in mxt_update_cfg()
  Input: synaptics - enable SMBUS on T480 thinkpad trackpad
  Input: atmel_mxt_ts - fix -Wunused-const-variable
  Input: joydev - extend absolute mouse detection
  HID: quirks: Refactor ELAN 400 and 401 handling
  Input: elan_i2c - export the device id whitelist
  Input: edt-ft5x06 - use get_unaligned_be16()
  Input: iforce - add the Saitek R440 Force Wheel
  Input: iforce - use unaligned accessors, where appropriate
  Input: iforce - drop couple of temps from transport code
  Input: iforce - drop bus type from iforce structure
  Input: iforce - use DMA-safe buffores for USB transfers
  Input: iforce - allow callers supply data buffer when fetching device IDs
  Input: iforce - only call iforce_process_packet() if initialized
  Input: iforce - signal command completion from transport code
  Input: iforce - do not combine arguments for iforce_process_packet()
  Input: iforce - factor out hat handling when parsing packets
  ...

Documentation/devicetree/bindings/input/elan_i2c.txt

@@ -13,9 +13,20 @@ Optional properties:
   pinctrl binding [1]).
 - vcc-supply: a phandle for the regulator supplying 3.3V power.
 - elan,trackpoint: touchpad can support a trackpoint (boolean)
+- elan,clickpad: touchpad is a clickpad (the entire surface is a button)
+- elan,middle-button: touchpad has a physical middle button
+- elan,x_traces: number of antennas on the x axis
+- elan,y_traces: number of antennas on the y axis
+- some generic touchscreen properties [2]:
+  * touchscreen-size-x
+  * touchscreen-size-y
+  * touchscreen-x-mm
+  * touchscreen-y-mm
+
 
 [0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
 [1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+[2]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
 
 Example:
 	&i2c1 {

drivers/hid/hid-quirks.c

@@ -16,6 +16,7 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>
+#include <linux/input/elan-i2c-ids.h>
 
 #include "hid-ids.h"
 
@@ -916,6 +917,8 @@ static const struct hid_device_id hid_mouse_ignore_list[] = {
 
 bool hid_ignore(struct hid_device *hdev)
 {
+	int i;
+
 	if (hdev->quirks & HID_QUIRK_NO_IGNORE)
 		return false;
 	if (hdev->quirks & HID_QUIRK_IGNORE)
@@ -980,18 +983,15 @@ bool hid_ignore(struct hid_device *hdev)
 		break;
 	case USB_VENDOR_ID_ELAN:
 		/*
-		 * Many Elan devices have a product id of 0x0401 and are handled
-		 * by the elan_i2c input driver. But the ACPI HID ELAN0800 dev
-		 * is not (and cannot be) handled by that driver ->
-		 * Ignore all 0x0401 devs except for the ELAN0800 dev.
+		 * Blacklist of everything that gets handled by the elan_i2c
+		 * input driver.  This avoids disabling valid touchpads and
+		 * other ELAN devices.
 		 */
-		if (hdev->product == 0x0401 &&
-		    strncmp(hdev->name, "ELAN0800", 8) != 0)
-			return true;
-		/* Same with product id 0x0400 */
-		if (hdev->product == 0x0400 &&
-		    strncmp(hdev->name, "QTEC0001", 8) != 0)
-			return true;
+		if ((hdev->product == 0x0401 || hdev->product == 0x0400))
+			for (i = 0; strlen(elan_acpi_id[i].id); ++i)
+				if (!strncmp(hdev->name, elan_acpi_id[i].id,
+					     strlen(elan_acpi_id[i].id)))
+					return true;
 		break;
 	}
 

drivers/input/joydev.c

@@ -808,6 +808,7 @@ static bool joydev_dev_is_blacklisted(struct input_dev *dev)
 static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
 {
 	DECLARE_BITMAP(jd_scratch, KEY_CNT);
+	bool ev_match = false;
 
 	BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT);
 
@@ -826,17 +827,36 @@ static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
 	 * considered to be an absolute mouse if the following is
 	 * true:
 	 *
-	 * 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN.
+	 * 1) Event types are exactly
+	 *      EV_ABS, EV_KEY and EV_SYN
+	 *    or
+	 *      EV_ABS, EV_KEY, EV_SYN and EV_MSC
+	 *    or
+	 *      EV_ABS, EV_KEY, EV_SYN, EV_MSC and EV_REL.
 	 * 2) Absolute events are exactly ABS_X and ABS_Y.
 	 * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE.
 	 * 4) Device is not on "Amiga" bus.
 	 */
 
 	bitmap_zero(jd_scratch, EV_CNT);
+	/* VMware VMMouse, HP ILO2 */
 	__set_bit(EV_ABS, jd_scratch);
 	__set_bit(EV_KEY, jd_scratch);
 	__set_bit(EV_SYN, jd_scratch);
-	if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+	if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+		ev_match = true;
+
+	/* HP ILO2, AMI BMC firmware */
+	__set_bit(EV_MSC, jd_scratch);
+	if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+		ev_match = true;
+
+	/* VMware Virtual USB Mouse, QEMU USB Tablet, ATEN BMC firmware */
+	__set_bit(EV_REL, jd_scratch);
+	if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+		ev_match = true;
+
+	if (!ev_match)
 		return false;
 
 	bitmap_zero(jd_scratch, ABS_CNT);

drivers/input/joystick/iforce/Kconfig

@@ -14,15 +14,15 @@ config JOYSTICK_IFORCE
 	  module will be called iforce.
 
 config JOYSTICK_IFORCE_USB
-	bool "I-Force USB joysticks and wheels"
-	depends on JOYSTICK_IFORCE && (JOYSTICK_IFORCE=m || USB=y) && USB
+	tristate "I-Force USB joysticks and wheels"
+	depends on JOYSTICK_IFORCE && USB
 	help
 	  Say Y here if you have an I-Force joystick or steering wheel
 	  connected to your USB port.
 
 config JOYSTICK_IFORCE_232
-	bool "I-Force Serial joysticks and wheels"
-	depends on JOYSTICK_IFORCE && (JOYSTICK_IFORCE=m || SERIO=y) && SERIO
+	tristate "I-Force Serial joysticks and wheels"
+	depends on JOYSTICK_IFORCE && SERIO
 	help
 	  Say Y here if you have an I-Force joystick or steering wheel
 	  connected to your serial (COM) port.

drivers/input/joystick/iforce/Makefile

@@ -5,8 +5,7 @@
 # By Johann Deneux <johann.deneux@gmail.com>
 #
 
-obj-$(CONFIG_JOYSTICK_IFORCE)	+= iforce.o
-
+obj-$(CONFIG_JOYSTICK_IFORCE)		+= iforce.o
 iforce-y := iforce-ff.o iforce-main.o iforce-packets.o
-iforce-$(CONFIG_JOYSTICK_IFORCE_232)	+= iforce-serio.o
-iforce-$(CONFIG_JOYSTICK_IFORCE_USB)	+= iforce-usb.o
+obj-$(CONFIG_JOYSTICK_IFORCE_232)	+= iforce-serio.o
+obj-$(CONFIG_JOYSTICK_IFORCE_USB)	+= iforce-usb.o

drivers/input/joystick/iforce/iforce-ff.c

@@ -372,12 +372,12 @@ int iforce_upload_periodic(struct iforce *iforce, struct ff_effect *effect, stru
 	}
 
 	switch (effect->u.periodic.waveform) {
-		case FF_SQUARE:		wave_code = 0x20; break;
-		case FF_TRIANGLE:	wave_code = 0x21; break;
-		case FF_SINE:		wave_code = 0x22; break;
-		case FF_SAW_UP:		wave_code = 0x23; break;
-		case FF_SAW_DOWN:	wave_code = 0x24; break;
-		default:		wave_code = 0x20; break;
+	case FF_SQUARE:		wave_code = 0x20; break;
+	case FF_TRIANGLE:	wave_code = 0x21; break;
+	case FF_SINE:		wave_code = 0x22; break;
+	case FF_SAW_UP:		wave_code = 0x23; break;
+	case FF_SAW_DOWN:	wave_code = 0x24; break;
+	default:		wave_code = 0x20; break;
 	}
 
 	if (!old || need_core(old, effect)) {
@@ -476,9 +476,9 @@ int iforce_upload_condition(struct iforce *iforce, struct ff_effect *effect, str
 	int core_err = 0;
 
 	switch (effect->type) {
-		case FF_SPRING:	type = 0x40; break;
-		case FF_DAMPER:	type = 0x41; break;
-		default: return -1;
+	case FF_SPRING:	type = 0x40; break;
+	case FF_DAMPER:	type = 0x41; break;
+	default: return -1;
 	}
 
 	if (!old || need_condition_modifier(iforce, old, effect)) {

drivers/input/joystick/iforce/iforce-main.c

@@ -9,10 +9,11 @@
 /*
  */
 
+#include <asm/unaligned.h>
 #include "iforce.h"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
-MODULE_DESCRIPTION("USB/RS232 I-Force joysticks and wheels driver");
+MODULE_DESCRIPTION("Core I-Force joysticks and wheels driver");
 MODULE_LICENSE("GPL");
 
 static signed short btn_joystick[] =
@@ -55,6 +56,7 @@ static struct iforce_device iforce_device[] = {
 	{ 0x05ef, 0x8888, "AVB Top Shot Force Feedback Racing Wheel",	btn_wheel, abs_wheel, ff_iforce }, //?
 	{ 0x061c, 0xc0a4, "ACT LABS Force RS",                          btn_wheel, abs_wheel, ff_iforce }, //?
 	{ 0x061c, 0xc084, "ACT LABS Force RS",				btn_wheel, abs_wheel, ff_iforce },
+	{ 0x06a3, 0xff04, "Saitek R440 Force Wheel",			btn_wheel, abs_wheel, ff_iforce }, //?
 	{ 0x06f8, 0x0001, "Guillemot Race Leader Force Feedback",	btn_wheel, abs_wheel, ff_iforce }, //?
 	{ 0x06f8, 0x0001, "Guillemot Jet Leader Force Feedback",	btn_joystick, abs_joystick_rudder, ff_iforce },
 	{ 0x06f8, 0x0004, "Guillemot Force Feedback Racing Wheel",	btn_wheel, abs_wheel, ff_iforce }, //?
@@ -120,22 +122,21 @@ static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect,
  * Upload the effect
  */
 	switch (effect->type) {
+	case FF_PERIODIC:
+		ret = iforce_upload_periodic(iforce, effect, old);
+		break;
 
-		case FF_PERIODIC:
-			ret = iforce_upload_periodic(iforce, effect, old);
-			break;
-
-		case FF_CONSTANT:
-			ret = iforce_upload_constant(iforce, effect, old);
-			break;
+	case FF_CONSTANT:
+		ret = iforce_upload_constant(iforce, effect, old);
+		break;
 
-		case FF_SPRING:
-		case FF_DAMPER:
-			ret = iforce_upload_condition(iforce, effect, old);
-			break;
+	case FF_SPRING:
+	case FF_DAMPER:
+		ret = iforce_upload_condition(iforce, effect, old);
+		break;
 
-		default:
-			return -EINVAL;
+	default:
+		return -EINVAL;
 	}
 
 	if (ret == 0) {
@@ -173,15 +174,7 @@ static int iforce_open(struct input_dev *dev)
 {
 	struct iforce *iforce = input_get_drvdata(dev);
 
-	switch (iforce->bus) {
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-		case IFORCE_USB:
-			iforce->irq->dev = iforce->usbdev;
-			if (usb_submit_urb(iforce->irq, GFP_KERNEL))
-				return -EIO;
-			break;
-#endif
-	}
+	iforce->xport_ops->start_io(iforce);
 
 	if (test_bit(EV_FF, dev->evbit)) {
 		/* Enable force feedback */
@@ -214,27 +207,17 @@ static void iforce_close(struct input_dev *dev)
 			!test_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags));
 	}
 
-	switch (iforce->bus) {
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	case IFORCE_USB:
-		usb_kill_urb(iforce->irq);
-		usb_kill_urb(iforce->out);
-		usb_kill_urb(iforce->ctrl);
-		break;
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	case IFORCE_232:
-		//TODO: Wait for the last packets to be sent
-		break;
-#endif
-	}
+	iforce->xport_ops->stop_io(iforce);
 }
 
-int iforce_init_device(struct iforce *iforce)
+int iforce_init_device(struct device *parent, u16 bustype,
+		       struct iforce *iforce)
 {
 	struct input_dev *input_dev;
 	struct ff_device *ff;
-	unsigned char c[] = "CEOV";
+	u8 c[] = "CEOV";
+	u8 buf[IFORCE_MAX_LENGTH];
+	size_t len;
 	int i, error;
 	int ff_effects = 0;
 
@@ -252,20 +235,8 @@ int iforce_init_device(struct iforce *iforce)
  * Input device fields.
  */
 
-	switch (iforce->bus) {
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	case IFORCE_USB:
-		input_dev->id.bustype = BUS_USB;
-		input_dev->dev.parent = &iforce->usbdev->dev;
-		break;
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	case IFORCE_232:
-		input_dev->id.bustype = BUS_RS232;
-		input_dev->dev.parent = &iforce->serio->dev;
-		break;
-#endif
-	}
+	input_dev->id.bustype = bustype;
+	input_dev->dev.parent = parent;
 
 	input_set_drvdata(input_dev, iforce);
 
@@ -290,7 +261,7 @@ int iforce_init_device(struct iforce *iforce)
  */
 
 	for (i = 0; i < 20; i++)
-		if (!iforce_get_id_packet(iforce, "O"))
+		if (!iforce_get_id_packet(iforce, 'O', buf, &len))
 			break;
 
 	if (i == 20) { /* 5 seconds */
@@ -304,23 +275,23 @@ int iforce_init_device(struct iforce *iforce)
  * Get device info.
  */
 
-	if (!iforce_get_id_packet(iforce, "M"))
-		input_dev->id.vendor = (iforce->edata[2] << 8) | iforce->edata[1];
+	if (!iforce_get_id_packet(iforce, 'M', buf, &len) || len < 3)
+		input_dev->id.vendor = get_unaligned_le16(buf + 1);
 	else
 		dev_warn(&iforce->dev->dev, "Device does not respond to id packet M\n");
 
-	if (!iforce_get_id_packet(iforce, "P"))
-		input_dev->id.product = (iforce->edata[2] << 8) | iforce->edata[1];
+	if (!iforce_get_id_packet(iforce, 'P', buf, &len) || len < 3)
+		input_dev->id.product = get_unaligned_le16(buf + 1);
 	else
 		dev_warn(&iforce->dev->dev, "Device does not respond to id packet P\n");
 
-	if (!iforce_get_id_packet(iforce, "B"))
-		iforce->device_memory.end = (iforce->edata[2] << 8) | iforce->edata[1];
+	if (!iforce_get_id_packet(iforce, 'B', buf, &len) || len < 3)
+		iforce->device_memory.end = get_unaligned_le16(buf + 1);
 	else
 		dev_warn(&iforce->dev->dev, "Device does not respond to id packet B\n");
 
-	if (!iforce_get_id_packet(iforce, "N"))
-		ff_effects = iforce->edata[1];
+	if (!iforce_get_id_packet(iforce, 'N', buf, &len) || len < 2)
+		ff_effects = buf[1];
 	else
 		dev_warn(&iforce->dev->dev, "Device does not respond to id packet N\n");
 
@@ -336,8 +307,9 @@ int iforce_init_device(struct iforce *iforce)
  */
 
 	for (i = 0; c[i]; i++)
-		if (!iforce_get_id_packet(iforce, c + i))
-			iforce_dump_packet(iforce, "info", iforce->ecmd, iforce->edata);
+		if (!iforce_get_id_packet(iforce, c[i], buf, &len))
+			iforce_dump_packet(iforce, "info",
+					   (FF_CMD_QUERY & 0xff00) | len, buf);
 
 /*
  * Disable spring, enable force feedback.
@@ -371,34 +343,29 @@ int iforce_init_device(struct iforce *iforce)
 		signed short t = iforce->type->abs[i];
 
 		switch (t) {
+		case ABS_X:
+		case ABS_Y:
+		case ABS_WHEEL:
+			input_set_abs_params(input_dev, t, -1920, 1920, 16, 128);
+			set_bit(t, input_dev->ffbit);
+			break;
 
-			case ABS_X:
-			case ABS_Y:
-			case ABS_WHEEL:
-
-				input_set_abs_params(input_dev, t, -1920, 1920, 16, 128);
-				set_bit(t, input_dev->ffbit);
-				break;
-
-			case ABS_THROTTLE:
-			case ABS_GAS:
-			case ABS_BRAKE:
-
-				input_set_abs_params(input_dev, t, 0, 255, 0, 0);
-				break;
-
-			case ABS_RUDDER:
-
-				input_set_abs_params(input_dev, t, -128, 127, 0, 0);
-				break;
+		case ABS_THROTTLE:
+		case ABS_GAS:
+		case ABS_BRAKE:
+			input_set_abs_params(input_dev, t, 0, 255, 0, 0);
+			break;
 
-			case ABS_HAT0X:
-			case ABS_HAT0Y:
-		        case ABS_HAT1X:
-		        case ABS_HAT1Y:
+		case ABS_RUDDER:
+			input_set_abs_params(input_dev, t, -128, 127, 0, 0);
+			break;
 
-				input_set_abs_params(input_dev, t, -1, 1, 0, 0);
-				break;
+		case ABS_HAT0X:
+		case ABS_HAT0Y:
+		case ABS_HAT1X:
+		case ABS_HAT1Y:
+			input_set_abs_params(input_dev, t, -1, 1, 0, 0);
+			break;
 		}
 	}
 
@@ -431,35 +398,4 @@ int iforce_init_device(struct iforce *iforce)
  fail:	input_free_device(input_dev);
 	return error;
 }
-
-static int __init iforce_init(void)
-{
-	int err = 0;
-
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	err = usb_register(&iforce_usb_driver);
-	if (err)
-		return err;
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	err = serio_register_driver(&iforce_serio_drv);
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	if (err)
-		usb_deregister(&iforce_usb_driver);
-#endif
-#endif
-	return err;
-}
-
-static void __exit iforce_exit(void)
-{
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	usb_deregister(&iforce_usb_driver);
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	serio_unregister_driver(&iforce_serio_drv);
-#endif
-}
-
-module_init(iforce_init);
-module_exit(iforce_exit);
+EXPORT_SYMBOL(iforce_init_device);

drivers/input/joystick/iforce/iforce-packets.c

@@ -9,6 +9,7 @@
 /*
  */
 
+#include <asm/unaligned.h>
 #include "iforce.h"
 
 static struct {
@@ -79,27 +80,12 @@ int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
 /*
  * If necessary, start the transmission
  */
-	switch (iforce->bus) {
+	if (empty)
+		iforce->xport_ops->xmit(iforce);
 
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-		case IFORCE_232:
-		if (empty)
-			iforce_serial_xmit(iforce);
-		break;
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-		case IFORCE_USB:
-
-		if (iforce->usbdev && empty &&
-			!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
-
-			iforce_usb_xmit(iforce);
-		}
-		break;
-#endif
-	}
 	return 0;
 }
+EXPORT_SYMBOL(iforce_send_packet);
 
 /* Start or stop an effect */
 int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
@@ -133,157 +119,96 @@ static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
 	return -1;
 }
 
-void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data)
+static void iforce_report_hats_buttons(struct iforce *iforce, u8 *data)
 {
 	struct input_dev *dev = iforce->dev;
 	int i;
-	static int being_used = 0;
 
-	if (being_used)
-		dev_warn(&iforce->dev->dev,
-			 "re-entrant call to iforce_process %d\n", being_used);
-	being_used++;
-
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	if (HI(iforce->expect_packet) == HI(cmd)) {
-		iforce->expect_packet = 0;
-		iforce->ecmd = cmd;
-		memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
-	}
-#endif
-	wake_up(&iforce->wait);
+	input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
+	input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
 
-	if (!iforce->type) {
-		being_used--;
-		return;
-	}
-
-	switch (HI(cmd)) {
-
-		case 0x01:	/* joystick position data */
-		case 0x03:	/* wheel position data */
-			if (HI(cmd) == 1) {
-				input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
-				input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
-				input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
-				if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
-					input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
-			} else {
-				input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
-				input_report_abs(dev, ABS_GAS,   255 - data[2]);
-				input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
-			}
+	for (i = 0; iforce->type->btn[i] >= 0; i++)
+		input_report_key(dev, iforce->type->btn[i],
+				 data[(i >> 3) + 5] & (1 << (i & 7)));
 
-			input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
-			input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
-
-			for (i = 0; iforce->type->btn[i] >= 0; i++)
-				input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
-
-			/* If there are untouched bits left, interpret them as the second hat */
-			if (i <= 8) {
-				int btns = data[6];
-				if (test_bit(ABS_HAT1X, dev->absbit)) {
-					if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
-					else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
-					else input_report_abs(dev, ABS_HAT1X, 0);
-				}
-				if (test_bit(ABS_HAT1Y, dev->absbit)) {
-					if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
-					else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
-					else input_report_abs(dev, ABS_HAT1Y, 0);
-				}
-			}
+	/* If there are untouched bits left, interpret them as the second hat */
+	if (i <= 8) {
+		u8 btns = data[6];
 
-			input_sync(dev);
-
-			break;
-
-		case 0x02:	/* status report */
-			input_report_key(dev, BTN_DEAD, data[0] & 0x02);
-			input_sync(dev);
+		if (test_bit(ABS_HAT1X, dev->absbit)) {
+			if (btns & BIT(3))
+				input_report_abs(dev, ABS_HAT1X, -1);
+			else if (btns & BIT(1))
+				input_report_abs(dev, ABS_HAT1X, 1);
+			else
+				input_report_abs(dev, ABS_HAT1X, 0);
+		}
 
-			/* Check if an effect was just started or stopped */
-			i = data[1] & 0x7f;
-			if (data[1] & 0x80) {
-				if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
-					/* Report play event */
-					input_report_ff_status(dev, i, FF_STATUS_PLAYING);
-				}
-			} else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
-				/* Report stop event */
-				input_report_ff_status(dev, i, FF_STATUS_STOPPED);
-			}
-			if (LO(cmd) > 3) {
-				int j;
-				for (j = 3; j < LO(cmd); j += 2)
-					mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
-			}
-			break;
+		if (test_bit(ABS_HAT1Y, dev->absbit)) {
+			if (btns & BIT(0))
+				input_report_abs(dev, ABS_HAT1Y, -1);
+			else if (btns & BIT(2))
+				input_report_abs(dev, ABS_HAT1Y, 1);
+			else
+				input_report_abs(dev, ABS_HAT1Y, 0);
+		}
 	}
-	being_used--;
 }
 
-int iforce_get_id_packet(struct iforce *iforce, char *packet)
+void iforce_process_packet(struct iforce *iforce,
+			   u8 packet_id, u8 *data, size_t len)
 {
-	switch (iforce->bus) {
+	struct input_dev *dev = iforce->dev;
+	int i, j;
 
-	case IFORCE_USB: {
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-		int status;
+	switch (packet_id) {
 
-		iforce->cr.bRequest = packet[0];
-		iforce->ctrl->dev = iforce->usbdev;
+	case 0x01:	/* joystick position data */
+		input_report_abs(dev, ABS_X,
+				 (__s16) get_unaligned_le16(data));
+		input_report_abs(dev, ABS_Y,
+				 (__s16) get_unaligned_le16(data + 2));
+		input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
 
-		status = usb_submit_urb(iforce->ctrl, GFP_KERNEL);
-		if (status) {
-			dev_err(&iforce->intf->dev,
-				"usb_submit_urb failed %d\n", status);
-			return -1;
-		}
+		if (len >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
+			input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
 
-		wait_event_interruptible_timeout(iforce->wait,
-			iforce->ctrl->status != -EINPROGRESS, HZ);
+		iforce_report_hats_buttons(iforce, data);
 
-		if (iforce->ctrl->status) {
-			dev_dbg(&iforce->intf->dev,
-				"iforce->ctrl->status = %d\n",
-				iforce->ctrl->status);
-			usb_unlink_urb(iforce->ctrl);
-			return -1;
-		}
-#else
-		printk(KERN_DEBUG "iforce_get_id_packet: iforce->bus = USB!\n");
-#endif
-		}
+		input_sync(dev);
 		break;
 
-	case IFORCE_232:
+	case 0x03:	/* wheel position data */
+		input_report_abs(dev, ABS_WHEEL,
+				 (__s16) get_unaligned_le16(data));
+		input_report_abs(dev, ABS_GAS,   255 - data[2]);
+		input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
 
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-		iforce->expect_packet = FF_CMD_QUERY;
-		iforce_send_packet(iforce, FF_CMD_QUERY, packet);
+		iforce_report_hats_buttons(iforce, data);
 
-		wait_event_interruptible_timeout(iforce->wait,
-			!iforce->expect_packet, HZ);
+		input_sync(dev);
+		break;
+
+	case 0x02:	/* status report */
+		input_report_key(dev, BTN_DEAD, data[0] & 0x02);
+		input_sync(dev);
 
-		if (iforce->expect_packet) {
-			iforce->expect_packet = 0;
-			return -1;
+		/* Check if an effect was just started or stopped */
+		i = data[1] & 0x7f;
+		if (data[1] & 0x80) {
+			if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
+				/* Report play event */
+				input_report_ff_status(dev, i, FF_STATUS_PLAYING);
+			}
+		} else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
+			/* Report stop event */
+			input_report_ff_status(dev, i, FF_STATUS_STOPPED);
 		}
-#else
-		dev_err(&iforce->dev->dev,
-			"iforce_get_id_packet: iforce->bus = SERIO!\n");
-#endif
-		break;
 
-	default:
-		dev_err(&iforce->dev->dev,
-			"iforce_get_id_packet: iforce->bus = %d\n",
-			iforce->bus);
+		for (j = 3; j < len; j += 2)
+			mark_core_as_ready(iforce, get_unaligned_le16(data + j));
+
 		break;
 	}
-
-	return -(iforce->edata[0] != packet[0]);
 }
-
+EXPORT_SYMBOL(iforce_process_packet);

drivers/input/joystick/iforce/iforce-serio.c

@@ -9,10 +9,26 @@
 /*
  */
 
+#include <linux/serio.h>
 #include "iforce.h"
 
-void iforce_serial_xmit(struct iforce *iforce)
+struct iforce_serio {
+	struct iforce iforce;
+
+	struct serio *serio;
+	int idx, pkt, len, id;
+	u8 csum;
+	u8 expect_packet;
+	u8 cmd_response[IFORCE_MAX_LENGTH];
+	u8 cmd_response_len;
+	u8 data_in[IFORCE_MAX_LENGTH];
+};
+
+static void iforce_serio_xmit(struct iforce *iforce)
 {
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
 	unsigned char cs;
 	int i;
 	unsigned long flags;
@@ -33,19 +49,20 @@ void iforce_serial_xmit(struct iforce *iforce)
 
 	cs = 0x2b;
 
-	serio_write(iforce->serio, 0x2b);
+	serio_write(iforce_serio->serio, 0x2b);
 
-	serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
+	serio_write(iforce_serio->serio, iforce->xmit.buf[iforce->xmit.tail]);
 	cs ^= iforce->xmit.buf[iforce->xmit.tail];
 	XMIT_INC(iforce->xmit.tail, 1);
 
 	for (i=iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
-		serio_write(iforce->serio, iforce->xmit.buf[iforce->xmit.tail]);
+		serio_write(iforce_serio->serio,
+			    iforce->xmit.buf[iforce->xmit.tail]);
 		cs ^= iforce->xmit.buf[iforce->xmit.tail];
 		XMIT_INC(iforce->xmit.tail, 1);
 	}
 
-	serio_write(iforce->serio, cs);
+	serio_write(iforce_serio->serio, cs);
 
 	if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
 		goto again;
@@ -55,54 +72,118 @@ void iforce_serial_xmit(struct iforce *iforce)
 	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
 }
 
+static int iforce_serio_get_id(struct iforce *iforce, u8 id,
+			       u8 *response_data, size_t *response_len)
+{
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
+
+	iforce_serio->expect_packet = HI(FF_CMD_QUERY);
+	iforce_serio->cmd_response_len = 0;
+
+	iforce_send_packet(iforce, FF_CMD_QUERY, &id);
+
+	wait_event_interruptible_timeout(iforce->wait,
+					 !iforce_serio->expect_packet, HZ);
+
+	if (iforce_serio->expect_packet) {
+		iforce_serio->expect_packet = 0;
+		return -ETIMEDOUT;
+	}
+
+	if (iforce_serio->cmd_response[0] != id)
+		return -EIO;
+
+	memcpy(response_data, iforce_serio->cmd_response,
+	       iforce_serio->cmd_response_len);
+	*response_len = iforce_serio->cmd_response_len;
+
+	return 0;
+}
+
+static int iforce_serio_start_io(struct iforce *iforce)
+{
+	/* No special handling required */
+	return 0;
+}
+
+static void iforce_serio_stop_io(struct iforce *iforce)
+{
+	//TODO: Wait for the last packets to be sent
+}
+
+static const struct iforce_xport_ops iforce_serio_xport_ops = {
+	.xmit		= iforce_serio_xmit,
+	.get_id		= iforce_serio_get_id,
+	.start_io	= iforce_serio_start_io,
+	.stop_io	= iforce_serio_stop_io,
+};
+
 static void iforce_serio_write_wakeup(struct serio *serio)
 {
 	struct iforce *iforce = serio_get_drvdata(serio);
 
-	iforce_serial_xmit(iforce);
+	iforce_serio_xmit(iforce);
 }
 
 static irqreturn_t iforce_serio_irq(struct serio *serio,
-		unsigned char data, unsigned int flags)
+				    unsigned char data, unsigned int flags)
 {
-	struct iforce *iforce = serio_get_drvdata(serio);
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
+	struct iforce *iforce = &iforce_serio->iforce;
 
-	if (!iforce->pkt) {
+	if (!iforce_serio->pkt) {
 		if (data == 0x2b)
-			iforce->pkt = 1;
+			iforce_serio->pkt = 1;
 		goto out;
 	}
 
-	if (!iforce->id) {
+	if (!iforce_serio->id) {
 		if (data > 3 && data != 0xff)
-			iforce->pkt = 0;
+			iforce_serio->pkt = 0;
 		else
-			iforce->id = data;
+			iforce_serio->id = data;
 		goto out;
 	}
 
-	if (!iforce->len) {
+	if (!iforce_serio->len) {
 		if (data > IFORCE_MAX_LENGTH) {
-			iforce->pkt = 0;
-			iforce->id = 0;
+			iforce_serio->pkt = 0;
+			iforce_serio->id = 0;
 		} else {
-			iforce->len = data;
+			iforce_serio->len = data;
 		}
 		goto out;
 	}
 
-	if (iforce->idx < iforce->len) {
-		iforce->csum += iforce->data[iforce->idx++] = data;
+	if (iforce_serio->idx < iforce_serio->len) {
+		iforce_serio->data_in[iforce_serio->idx++] = data;
+		iforce_serio->csum += data;
 		goto out;
 	}
 
-	if (iforce->idx == iforce->len) {
-		iforce_process_packet(iforce, (iforce->id << 8) | iforce->idx, iforce->data);
-		iforce->pkt = 0;
-		iforce->id  = 0;
-		iforce->len = 0;
-		iforce->idx = 0;
-		iforce->csum = 0;
+	if (iforce_serio->idx == iforce_serio->len) {
+		/* Handle command completion */
+		if (iforce_serio->expect_packet == iforce_serio->id) {
+			iforce_serio->expect_packet = 0;
+			memcpy(iforce_serio->cmd_response,
+			       iforce_serio->data_in, IFORCE_MAX_LENGTH);
+			iforce_serio->cmd_response_len = iforce_serio->len;
+
+			/* Signal that command is done */
+			wake_up(&iforce->wait);
+		} else if (likely(iforce->type)) {
+			iforce_process_packet(iforce, iforce_serio->id,
+					      iforce_serio->data_in,
+					      iforce_serio->len);
+		}
+
+		iforce_serio->pkt = 0;
+		iforce_serio->id  = 0;
+		iforce_serio->len = 0;
+		iforce_serio->idx = 0;
+		iforce_serio->csum = 0;
 	}
 out:
 	return IRQ_HANDLED;
@@ -110,23 +191,23 @@ static irqreturn_t iforce_serio_irq(struct serio *serio,
 
 static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
 {
-	struct iforce *iforce;
+	struct iforce_serio *iforce_serio;
 	int err;
 
-	iforce = kzalloc(sizeof(struct iforce), GFP_KERNEL);
-	if (!iforce)
+	iforce_serio = kzalloc(sizeof(*iforce_serio), GFP_KERNEL);
+	if (!iforce_serio)
 		return -ENOMEM;
 
-	iforce->bus = IFORCE_232;
-	iforce->serio = serio;
+	iforce_serio->iforce.xport_ops = &iforce_serio_xport_ops;
 
-	serio_set_drvdata(serio, iforce);
+	iforce_serio->serio = serio;
+	serio_set_drvdata(serio, iforce_serio);
 
 	err = serio_open(serio, drv);
 	if (err)
 		goto fail1;
 
-	err = iforce_init_device(iforce);
+	err = iforce_init_device(&serio->dev, BUS_RS232, &iforce_serio->iforce);
 	if (err)
 		goto fail2;
 
@@ -134,18 +215,18 @@ static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
 
  fail2:	serio_close(serio);
  fail1:	serio_set_drvdata(serio, NULL);
-	kfree(iforce);
+	kfree(iforce_serio);
 	return err;
 }
 
 static void iforce_serio_disconnect(struct serio *serio)
 {
-	struct iforce *iforce = serio_get_drvdata(serio);
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
 
-	input_unregister_device(iforce->dev);
+	input_unregister_device(iforce_serio->iforce.dev);
 	serio_close(serio);
 	serio_set_drvdata(serio, NULL);
-	kfree(iforce);
+	kfree(iforce_serio);
 }
 
 static const struct serio_device_id iforce_serio_ids[] = {
@@ -171,3 +252,9 @@ struct serio_driver iforce_serio_drv = {
 	.connect	= iforce_serio_connect,
 	.disconnect	= iforce_serio_disconnect,
 };
+
+module_serio_driver(iforce_serio_drv);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("RS232 I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");

drivers/input/joystick/iforce/iforce-usb.c

@@ -9,10 +9,24 @@
 /*
  */
 
+#include <linux/usb.h>
 #include "iforce.h"
 
-void iforce_usb_xmit(struct iforce *iforce)
+struct iforce_usb {
+	struct iforce iforce;
+
+	struct usb_device *usbdev;
+	struct usb_interface *intf;
+	struct urb *irq, *out;
+
+	u8 data_in[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+	u8 data_out[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+};
+
+static void __iforce_usb_xmit(struct iforce *iforce)
 {
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
 	int n, c;
 	unsigned long flags;
 
@@ -24,31 +38,32 @@ void iforce_usb_xmit(struct iforce *iforce)
 		return;
 	}
 
-	((char *)iforce->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
+	((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
 	XMIT_INC(iforce->xmit.tail, 1);
 	n = iforce->xmit.buf[iforce->xmit.tail];
 	XMIT_INC(iforce->xmit.tail, 1);
 
-	iforce->out->transfer_buffer_length = n + 1;
-	iforce->out->dev = iforce->usbdev;
+	iforce_usb->out->transfer_buffer_length = n + 1;
+	iforce_usb->out->dev = iforce_usb->usbdev;
 
 	/* Copy rest of data then */
 	c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
 	if (n < c) c=n;
 
-	memcpy(iforce->out->transfer_buffer + 1,
+	memcpy(iforce_usb->out->transfer_buffer + 1,
 	       &iforce->xmit.buf[iforce->xmit.tail],
 	       c);
 	if (n != c) {
-		memcpy(iforce->out->transfer_buffer + 1 + c,
+		memcpy(iforce_usb->out->transfer_buffer + 1 + c,
 		       &iforce->xmit.buf[0],
 		       n-c);
 	}
 	XMIT_INC(iforce->xmit.tail, n);
 
-	if ( (n=usb_submit_urb(iforce->out, GFP_ATOMIC)) ) {
+	if ( (n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC)) ) {
 		clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
-		dev_warn(&iforce->intf->dev, "usb_submit_urb failed %d\n", n);
+		dev_warn(&iforce_usb->intf->dev,
+			 "usb_submit_urb failed %d\n", n);
 	}
 
 	/* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
@@ -57,10 +72,77 @@ void iforce_usb_xmit(struct iforce *iforce)
 	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
 }
 
+static void iforce_usb_xmit(struct iforce *iforce)
+{
+	if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
+		__iforce_usb_xmit(iforce);
+}
+
+static int iforce_usb_get_id(struct iforce *iforce, u8 id,
+			     u8 *response_data, size_t *response_len)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+	u8 *buf;
+	int status;
+
+	buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	status = usb_control_msg(iforce_usb->usbdev,
+				 usb_rcvctrlpipe(iforce_usb->usbdev, 0),
+				 id,
+				 USB_TYPE_VENDOR | USB_DIR_IN |
+					USB_RECIP_INTERFACE,
+				 0, 0, buf, IFORCE_MAX_LENGTH, HZ);
+	if (status < 0) {
+		dev_err(&iforce_usb->intf->dev,
+			"usb_submit_urb failed: %d\n", status);
+	} else if (buf[0] != id) {
+		status = -EIO;
+	} else {
+		memcpy(response_data, buf, status);
+		*response_len = status;
+		status = 0;
+	}
+
+	kfree(buf);
+	return status;
+}
+
+static int iforce_usb_start_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void iforce_usb_stop_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	usb_kill_urb(iforce_usb->irq);
+	usb_kill_urb(iforce_usb->out);
+}
+
+static const struct iforce_xport_ops iforce_usb_xport_ops = {
+	.xmit		= iforce_usb_xmit,
+	.get_id		= iforce_usb_get_id,
+	.start_io	= iforce_usb_start_io,
+	.stop_io	= iforce_usb_stop_io,
+};
+
 static void iforce_usb_irq(struct urb *urb)
 {
-	struct iforce *iforce = urb->context;
-	struct device *dev = &iforce->intf->dev;
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
+	struct device *dev = &iforce_usb->intf->dev;
 	int status;
 
 	switch (urb->status) {
@@ -80,11 +162,11 @@ static void iforce_usb_irq(struct urb *urb)
 		goto exit;
 	}
 
-	iforce_process_packet(iforce,
-		(iforce->data[0] << 8) | (urb->actual_length - 1), iforce->data + 1);
+	iforce_process_packet(iforce, iforce_usb->data_in[0],
+			      iforce_usb->data_in + 1, urb->actual_length - 1);
 
 exit:
-	status = usb_submit_urb (urb, GFP_ATOMIC);
+	status = usb_submit_urb(urb, GFP_ATOMIC);
 	if (status)
 		dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
 			__func__, status);
@@ -92,35 +174,28 @@ static void iforce_usb_irq(struct urb *urb)
 
 static void iforce_usb_out(struct urb *urb)
 {
-	struct iforce *iforce = urb->context;
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
 
 	if (urb->status) {
 		clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
-		dev_dbg(&iforce->intf->dev, "urb->status %d, exiting\n",
+		dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
 			urb->status);
 		return;
 	}
 
-	iforce_usb_xmit(iforce);
+	__iforce_usb_xmit(iforce);
 
 	wake_up(&iforce->wait);
 }
 
-static void iforce_usb_ctrl(struct urb *urb)
-{
-	struct iforce *iforce = urb->context;
-	if (urb->status) return;
-	iforce->ecmd = 0xff00 | urb->actual_length;
-	wake_up(&iforce->wait);
-}
-
 static int iforce_usb_probe(struct usb_interface *intf,
 				const struct usb_device_id *id)
 {
 	struct usb_device *dev = interface_to_usbdev(intf);
 	struct usb_host_interface *interface;
 	struct usb_endpoint_descriptor *epirq, *epout;
-	struct iforce *iforce;
+	struct iforce_usb *iforce_usb;
 	int err = -ENOMEM;
 
 	interface = intf->cur_altsetting;
@@ -131,48 +206,45 @@ static int iforce_usb_probe(struct usb_interface *intf,
 	epirq = &interface->endpoint[0].desc;
 	epout = &interface->endpoint[1].desc;
 
-	if (!(iforce = kzalloc(sizeof(struct iforce) + 32, GFP_KERNEL)))
-		goto fail;
-
-	if (!(iforce->irq = usb_alloc_urb(0, GFP_KERNEL)))
+	iforce_usb = kzalloc(sizeof(*iforce_usb), GFP_KERNEL);
+	if (!iforce_usb)
 		goto fail;
 
-	if (!(iforce->out = usb_alloc_urb(0, GFP_KERNEL)))
+	iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->irq)
 		goto fail;
 
-	if (!(iforce->ctrl = usb_alloc_urb(0, GFP_KERNEL)))
+	iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->out)
 		goto fail;
 
-	iforce->bus = IFORCE_USB;
-	iforce->usbdev = dev;
-	iforce->intf = intf;
-
-	iforce->cr.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_INTERFACE;
-	iforce->cr.wIndex = 0;
-	iforce->cr.wLength = cpu_to_le16(16);
+	iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
 
-	usb_fill_int_urb(iforce->irq, dev, usb_rcvintpipe(dev, epirq->bEndpointAddress),
-			iforce->data, 16, iforce_usb_irq, iforce, epirq->bInterval);
+	iforce_usb->usbdev = dev;
+	iforce_usb->intf = intf;
 
-	usb_fill_int_urb(iforce->out, dev, usb_sndintpipe(dev, epout->bEndpointAddress),
-			iforce + 1, 32, iforce_usb_out, iforce, epout->bInterval);
+	usb_fill_int_urb(iforce_usb->irq, dev,
+			 usb_rcvintpipe(dev, epirq->bEndpointAddress),
+			 iforce_usb->data_in, sizeof(iforce_usb->data_in),
+			 iforce_usb_irq, iforce_usb, epirq->bInterval);
 
-	usb_fill_control_urb(iforce->ctrl, dev, usb_rcvctrlpipe(dev, 0),
-			(void*) &iforce->cr, iforce->edata, 16, iforce_usb_ctrl, iforce);
+	usb_fill_int_urb(iforce_usb->out, dev,
+			 usb_sndintpipe(dev, epout->bEndpointAddress),
+			 iforce_usb->data_out, sizeof(iforce_usb->data_out),
+			 iforce_usb_out, iforce_usb, epout->bInterval);
 
-	err = iforce_init_device(iforce);
+	err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
 	if (err)
 		goto fail;
 
-	usb_set_intfdata(intf, iforce);
+	usb_set_intfdata(intf, iforce_usb);
 	return 0;
 
 fail:
-	if (iforce) {
-		usb_free_urb(iforce->irq);
-		usb_free_urb(iforce->out);
-		usb_free_urb(iforce->ctrl);
-		kfree(iforce);
+	if (iforce_usb) {
+		usb_free_urb(iforce_usb->irq);
+		usb_free_urb(iforce_usb->out);
+		kfree(iforce_usb);
 	}
 
 	return err;
@@ -180,17 +252,16 @@ static int iforce_usb_probe(struct usb_interface *intf,
 
 static void iforce_usb_disconnect(struct usb_interface *intf)
 {
-	struct iforce *iforce = usb_get_intfdata(intf);
+	struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
 
 	usb_set_intfdata(intf, NULL);
 
-	input_unregister_device(iforce->dev);
+	input_unregister_device(iforce_usb->iforce.dev);
 
-	usb_free_urb(iforce->irq);
-	usb_free_urb(iforce->out);
-	usb_free_urb(iforce->ctrl);
+	usb_free_urb(iforce_usb->irq);
+	usb_free_urb(iforce_usb->out);
 
-	kfree(iforce);
+	kfree(iforce_usb);
 }
 
 static const struct usb_device_id iforce_usb_ids[] = {
@@ -202,6 +273,7 @@ static const struct usb_device_id iforce_usb_ids[] = {
 	{ USB_DEVICE(0x05ef, 0x8888) },		/* AVB Top Shot FFB Racing Wheel */
 	{ USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
 	{ USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
+	{ USB_DEVICE(0x06a3, 0xff04) },		/* Saitek R440 Force Wheel */
 	{ USB_DEVICE(0x06f8, 0x0001) },		/* Guillemot Race Leader Force Feedback */
 	{ USB_DEVICE(0x06f8, 0x0003) },		/* Guillemot Jet Leader Force Feedback */
 	{ USB_DEVICE(0x06f8, 0x0004) },		/* Guillemot Force Feedback Racing Wheel */
@@ -217,3 +289,9 @@ struct usb_driver iforce_usb_driver = {
 	.disconnect =	iforce_usb_disconnect,
 	.id_table =	iforce_usb_ids,
 };
+
+module_usb_driver(iforce_usb_driver);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");

drivers/input/joystick/iforce/iforce.h

@@ -14,8 +14,6 @@
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
-#include <linux/usb.h>
-#include <linux/serio.h>
 #include <linux/circ_buf.h>
 #include <linux/mutex.h>
 
@@ -28,10 +26,6 @@
 
 #define IFORCE_MAX_LENGTH	16
 
-/* iforce::bus */
-#define IFORCE_232	1
-#define IFORCE_USB	2
-
 #define IFORCE_EFFECTS_MAX	32
 
 /* Each force feedback effect is made of one core effect, which can be
@@ -81,27 +75,21 @@ struct iforce_device {
 	signed short *ff;
 };
 
+struct iforce;
+
+struct iforce_xport_ops {
+	void (*xmit)(struct iforce *iforce);
+	int (*get_id)(struct iforce *iforce, u8 id,
+		      u8 *response_data, size_t *response_len);
+	int (*start_io)(struct iforce *iforce);
+	void (*stop_io)(struct iforce *iforce);
+};
+
 struct iforce {
 	struct input_dev *dev;		/* Input device interface */
 	struct iforce_device *type;
-	int bus;
-
-	unsigned char data[IFORCE_MAX_LENGTH];
-	unsigned char edata[IFORCE_MAX_LENGTH];
-	u16 ecmd;
-	u16 expect_packet;
-
-#ifdef CONFIG_JOYSTICK_IFORCE_232
-	struct serio *serio;		/* RS232 transfer */
-	int idx, pkt, len, id;
-	unsigned char csum;
-#endif
-#ifdef CONFIG_JOYSTICK_IFORCE_USB
-	struct usb_device *usbdev;	/* USB transfer */
-	struct usb_interface *intf;
-	struct urb *irq, *out, *ctrl;
-	struct usb_ctrlrequest cr;
-#endif
+	const struct iforce_xport_ops *xport_ops;
+
 	spinlock_t xmit_lock;
 	/* Buffer used for asynchronous sending of bytes to the device */
 	struct circ_buf xmit;
@@ -127,23 +115,24 @@ struct iforce {
 /* Encode a time value */
 #define TIME_SCALE(a)	(a)
 
+static inline int iforce_get_id_packet(struct iforce *iforce, u8 id,
+				       u8 *response_data, size_t *response_len)
+{
+	return iforce->xport_ops->get_id(iforce, id,
+					 response_data, response_len);
+}
 
 /* Public functions */
-/* iforce-serio.c */
-void iforce_serial_xmit(struct iforce *iforce);
-
-/* iforce-usb.c */
-void iforce_usb_xmit(struct iforce *iforce);
-
 /* iforce-main.c */
-int iforce_init_device(struct iforce *iforce);
+int iforce_init_device(struct device *parent, u16 bustype,
+		       struct iforce *iforce);
 
 /* iforce-packets.c */
 int iforce_control_playback(struct iforce*, u16 id, unsigned int);
-void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data);
+void iforce_process_packet(struct iforce *iforce,
+			   u8 packet_id, u8 *data, size_t len);
 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
 void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data);
-int iforce_get_id_packet(struct iforce *iforce, char *packet);
 
 /* iforce-ff.c */
 int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *);

drivers/input/keyboard/gpio_keys.c

@@ -771,7 +771,6 @@ static int gpio_keys_probe(struct platform_device *pdev)
 	struct fwnode_handle *child = NULL;
 	struct gpio_keys_drvdata *ddata;
 	struct input_dev *input;
-	size_t size;
 	int i, error;
 	int wakeup = 0;
 
@@ -781,9 +780,8 @@ static int gpio_keys_probe(struct platform_device *pdev)
 			return PTR_ERR(pdata);
 	}
 
-	size = sizeof(struct gpio_keys_drvdata) +
-			pdata->nbuttons * sizeof(struct gpio_button_data);
-	ddata = devm_kzalloc(dev, size, GFP_KERNEL);
+	ddata = devm_kzalloc(dev, struct_size(ddata, data, pdata->nbuttons),
+			     GFP_KERNEL);
 	if (!ddata) {
 		dev_err(dev, "failed to allocate state\n");
 		return -ENOMEM;

drivers/input/keyboard/gpio_keys_polled.c

@@ -165,6 +165,8 @@ gpio_keys_polled_get_devtree_pdata(struct device *dev)
 	pdata->rep = device_property_present(dev, "autorepeat");
 	device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);
 
+	device_property_read_string(dev, "label", &pdata->name);
+
 	device_for_each_child_node(dev, child) {
 		if (fwnode_property_read_u32(child, "linux,code",
 					     &button->code)) {
@@ -232,7 +234,6 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 	struct gpio_keys_polled_dev *bdev;
 	struct input_polled_dev *poll_dev;
 	struct input_dev *input;
-	size_t size;
 	int error;
 	int i;
 
@@ -247,9 +248,8 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	size = sizeof(struct gpio_keys_polled_dev) +
-			pdata->nbuttons * sizeof(struct gpio_keys_button_data);
-	bdev = devm_kzalloc(dev, size, GFP_KERNEL);
+	bdev = devm_kzalloc(dev, struct_size(bdev, data, pdata->nbuttons),
+			    GFP_KERNEL);
 	if (!bdev) {
 		dev_err(dev, "no memory for private data\n");
 		return -ENOMEM;
@@ -269,7 +269,7 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
 
 	input = poll_dev->input;
 
-	input->name = pdev->name;
+	input->name = pdata->name ?: pdev->name;
 	input->phys = DRV_NAME"/input0";
 
 	input->id.bustype = BUS_HOST;

drivers/input/keyboard/imx_keypad.c

@@ -422,7 +422,6 @@ static int imx_keypad_probe(struct platform_device *pdev)
 			dev_get_platdata(&pdev->dev);
 	struct imx_keypad *keypad;
 	struct input_dev *input_dev;
-	struct resource *res;
 	int irq, error, i, row, col;
 
 	if (!keymap_data && !pdev->dev.of_node) {
@@ -455,8 +454,7 @@ static int imx_keypad_probe(struct platform_device *pdev)
 	timer_setup(&keypad->check_matrix_timer,
 		    imx_keypad_check_for_events, 0);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	keypad->mmio_base = devm_ioremap_resource(&pdev->dev, res);
+	keypad->mmio_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(keypad->mmio_base))
 		return PTR_ERR(keypad->mmio_base);
 

drivers/input/keyboard/tca8418_keypad.c

@@ -266,7 +266,7 @@ static int tca8418_keypad_probe(struct i2c_client *client,
 	struct tca8418_keypad *keypad_data;
 	struct input_dev *input;
 	u32 rows = 0, cols = 0;
-	int error, row_shift, max_keys;
+	int error, row_shift;
 	u8 reg;
 
 	/* Check i2c driver capabilities */
@@ -291,7 +291,6 @@ static int tca8418_keypad_probe(struct i2c_client *client,
 	}
 
 	row_shift = get_count_order(cols);
-	max_keys = rows << row_shift;
 
 	/* Allocate memory for keypad_data and input device */
 	keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL);

drivers/input/misc/da9063_onkey.c

@@ -13,7 +13,6 @@
 #include <linux/regmap.h>
 #include <linux/of.h>
 #include <linux/mfd/da9063/core.h>
-#include <linux/mfd/da9063/pdata.h>
 #include <linux/mfd/da9063/registers.h>
 #include <linux/mfd/da9062/core.h>
 #include <linux/mfd/da9062/registers.h>
@@ -192,8 +191,6 @@ static void da9063_cancel_poll(void *data)
 
 static int da9063_onkey_probe(struct platform_device *pdev)
 {
-	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
-	struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
 	struct da9063_onkey *onkey;
 	const struct of_device_id *match;
 	int irq;
@@ -220,12 +217,8 @@ static int da9063_onkey_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
-	if (pdata)
-		onkey->key_power = pdata->key_power;
-	else
-		onkey->key_power =
-			!of_property_read_bool(pdev->dev.of_node,
-					       "dlg,disable-key-power");
+	onkey->key_power = !of_property_read_bool(pdev->dev.of_node,
+						  "dlg,disable-key-power");
 
 	onkey->input = devm_input_allocate_device(&pdev->dev);
 	if (!onkey->input) {

drivers/input/misc/max77650-onkey.c

@@ -119,3 +119,4 @@ module_platform_driver(max77650_onkey_driver);
 MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver");
 MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:max77650-onkey");

drivers/input/mouse/elan_i2c_core.c

@@ -34,6 +34,7 @@
 #include <linux/completion.h>
 #include <linux/of.h>
 #include <linux/property.h>
+#include <linux/input/elan-i2c-ids.h>
 #include <linux/regulator/consumer.h>
 #include <asm/unaligned.h>
 
@@ -96,6 +97,7 @@ struct elan_tp_data {
 	u8			max_baseline;
 	bool			baseline_ready;
 	u8			clickpad;
+	bool			middle_button;
 };
 
 static int elan_get_fwinfo(u16 ic_type, u16 *validpage_count,
@@ -363,27 +365,62 @@ static unsigned int elan_convert_resolution(u8 val)
 
 static int elan_query_device_parameters(struct elan_tp_data *data)
 {
+	struct i2c_client *client = data->client;
 	unsigned int x_traces, y_traces;
+	u32 x_mm, y_mm;
 	u8 hw_x_res, hw_y_res;
 	int error;
 
-	error = data->ops->get_max(data->client, &data->max_x, &data->max_y);
-	if (error)
-		return error;
-
-	error = data->ops->get_num_traces(data->client, &x_traces, &y_traces);
-	if (error)
-		return error;
+	if (device_property_read_u32(&client->dev,
+				     "touchscreen-size-x", &data->max_x) ||
+	    device_property_read_u32(&client->dev,
+				     "touchscreen-size-y", &data->max_y)) {
+		error = data->ops->get_max(data->client,
+					   &data->max_x,
+					   &data->max_y);
+		if (error)
+			return error;
+	} else {
+		/* size is the maximum + 1 */
+		--data->max_x;
+		--data->max_y;
+	}
 
+	if (device_property_read_u32(&client->dev,
+				     "elan,x_traces",
+				     &x_traces) ||
+	    device_property_read_u32(&client->dev,
+				     "elan,y_traces",
+				     &y_traces)) {
+		error = data->ops->get_num_traces(data->client,
+						  &x_traces, &y_traces);
+		if (error)
+			return error;
+	}
 	data->width_x = data->max_x / x_traces;
 	data->width_y = data->max_y / y_traces;
 
-	error = data->ops->get_resolution(data->client, &hw_x_res, &hw_y_res);
-	if (error)
-		return error;
+	if (device_property_read_u32(&client->dev,
+				     "touchscreen-x-mm", &x_mm) ||
+	    device_property_read_u32(&client->dev,
+				     "touchscreen-y-mm", &y_mm)) {
+		error = data->ops->get_resolution(data->client,
+						  &hw_x_res, &hw_y_res);
+		if (error)
+			return error;
+
+		data->x_res = elan_convert_resolution(hw_x_res);
+		data->y_res = elan_convert_resolution(hw_y_res);
+	} else {
+		data->x_res = (data->max_x + 1) / x_mm;
+		data->y_res = (data->max_y + 1) / y_mm;
+	}
+
+	if (device_property_read_bool(&client->dev, "elan,clickpad"))
+		data->clickpad = 1;
 
-	data->x_res = elan_convert_resolution(hw_x_res);
-	data->y_res = elan_convert_resolution(hw_y_res);
+	if (device_property_read_bool(&client->dev, "elan,middle-button"))
+		data->middle_button = true;
 
 	return 0;
 }
@@ -923,8 +960,9 @@ static void elan_report_absolute(struct elan_tp_data *data, u8 *packet)
 			finger_data += ETP_FINGER_DATA_LEN;
 	}
 
-	input_report_key(input, BTN_LEFT, tp_info & 0x01);
-	input_report_key(input, BTN_RIGHT, tp_info & 0x02);
+	input_report_key(input, BTN_LEFT,   tp_info & BIT(0));
+	input_report_key(input, BTN_MIDDLE, tp_info & BIT(2));
+	input_report_key(input, BTN_RIGHT,  tp_info & BIT(1));
 	input_report_abs(input, ABS_DISTANCE, hover_event != 0);
 	input_mt_report_pointer_emulation(input, true);
 	input_sync(input);
@@ -1058,10 +1096,13 @@ static int elan_setup_input_device(struct elan_tp_data *data)
 
 	__set_bit(EV_ABS, input->evbit);
 	__set_bit(INPUT_PROP_POINTER, input->propbit);
-	if (data->clickpad)
+	if (data->clickpad) {
 		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
-	else
+	} else {
 		__set_bit(BTN_RIGHT, input->keybit);
+		if (data->middle_button)
+			__set_bit(BTN_MIDDLE, input->keybit);
+	}
 	__set_bit(BTN_LEFT, input->keybit);
 
 	/* Set up ST parameters */
@@ -1332,55 +1373,6 @@ static const struct i2c_device_id elan_id[] = {
 MODULE_DEVICE_TABLE(i2c, elan_id);
 
 #ifdef CONFIG_ACPI
-static const struct acpi_device_id elan_acpi_id[] = {
-	{ "ELAN0000", 0 },
-	{ "ELAN0100", 0 },
-	{ "ELAN0600", 0 },
-	{ "ELAN0601", 0 },
-	{ "ELAN0602", 0 },
-	{ "ELAN0603", 0 },
-	{ "ELAN0604", 0 },
-	{ "ELAN0605", 0 },
-	{ "ELAN0606", 0 },
-	{ "ELAN0607", 0 },
-	{ "ELAN0608", 0 },
-	{ "ELAN0609", 0 },
-	{ "ELAN060B", 0 },
-	{ "ELAN060C", 0 },
-	{ "ELAN060F", 0 },
-	{ "ELAN0610", 0 },
-	{ "ELAN0611", 0 },
-	{ "ELAN0612", 0 },
-	{ "ELAN0615", 0 },
-	{ "ELAN0616", 0 },
-	{ "ELAN0617", 0 },
-	{ "ELAN0618", 0 },
-	{ "ELAN0619", 0 },
-	{ "ELAN061A", 0 },
-	{ "ELAN061B", 0 },
-	{ "ELAN061C", 0 },
-	{ "ELAN061D", 0 },
-	{ "ELAN061E", 0 },
-	{ "ELAN061F", 0 },
-	{ "ELAN0620", 0 },
-	{ "ELAN0621", 0 },
-	{ "ELAN0622", 0 },
-	{ "ELAN0623", 0 },
-	{ "ELAN0624", 0 },
-	{ "ELAN0625", 0 },
-	{ "ELAN0626", 0 },
-	{ "ELAN0627", 0 },
-	{ "ELAN0628", 0 },
-	{ "ELAN0629", 0 },
-	{ "ELAN062A", 0 },
-	{ "ELAN062B", 0 },
-	{ "ELAN062C", 0 },
-	{ "ELAN062D", 0 },
-	{ "ELAN0631", 0 },
-	{ "ELAN0632", 0 },
-	{ "ELAN1000", 0 },
-	{ }
-};
 MODULE_DEVICE_TABLE(acpi, elan_acpi_id);
 #endif
 

drivers/input/mouse/elantech.c

@@ -226,6 +226,52 @@ static void elantech_packet_dump(struct psmouse *psmouse)
 		       psmouse->pktsize, psmouse->packet);
 }
 
+/*
+ * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
+ * fw_version for this is based on the following fw_version & caps table:
+ *
+ * Laptop-model:           fw_version:     caps:           buttons:
+ * Acer S3                 0x461f00        10, 13, 0e      clickpad
+ * Acer S7-392             0x581f01        50, 17, 0d      clickpad
+ * Acer V5-131             0x461f02        01, 16, 0c      clickpad
+ * Acer V5-551             0x461f00        ?               clickpad
+ * Asus K53SV              0x450f01        78, 15, 0c      2 hw buttons
+ * Asus G46VW              0x460f02        00, 18, 0c      2 hw buttons
+ * Asus G750JX             0x360f00        00, 16, 0c      2 hw buttons
+ * Asus TP500LN            0x381f17        10, 14, 0e      clickpad
+ * Asus X750JN             0x381f17        10, 14, 0e      clickpad
+ * Asus UX31               0x361f00        20, 15, 0e      clickpad
+ * Asus UX32VD             0x361f02        00, 15, 0e      clickpad
+ * Avatar AVIU-145A2       0x361f00        ?               clickpad
+ * Fujitsu CELSIUS H760    0x570f02        40, 14, 0c      3 hw buttons (**)
+ * Fujitsu CELSIUS H780    0x5d0f02        41, 16, 0d      3 hw buttons (**)
+ * Fujitsu LIFEBOOK E544   0x470f00        d0, 12, 09      2 hw buttons
+ * Fujitsu LIFEBOOK E546   0x470f00        50, 12, 09      2 hw buttons
+ * Fujitsu LIFEBOOK E547   0x470f00        50, 12, 09      2 hw buttons
+ * Fujitsu LIFEBOOK E554   0x570f01        40, 14, 0c      2 hw buttons
+ * Fujitsu LIFEBOOK E557   0x570f01        40, 14, 0c      2 hw buttons
+ * Fujitsu T725            0x470f01        05, 12, 09      2 hw buttons
+ * Fujitsu H730            0x570f00        c0, 14, 0c      3 hw buttons (**)
+ * Gigabyte U2442          0x450f01        58, 17, 0c      2 hw buttons
+ * Lenovo L430             0x350f02        b9, 15, 0c      2 hw buttons (*)
+ * Lenovo L530             0x350f02        b9, 15, 0c      2 hw buttons (*)
+ * Samsung NF210           0x150b00        78, 14, 0a      2 hw buttons
+ * Samsung NP770Z5E        0x575f01        10, 15, 0f      clickpad
+ * Samsung NP700Z5B        0x361f06        21, 15, 0f      clickpad
+ * Samsung NP900X3E-A02    0x575f03        ?               clickpad
+ * Samsung NP-QX410        0x851b00        19, 14, 0c      clickpad
+ * Samsung RC512           0x450f00        08, 15, 0c      2 hw buttons
+ * Samsung RF710           0x450f00        ?               2 hw buttons
+ * System76 Pangolin       0x250f01        ?               2 hw buttons
+ * (*) + 3 trackpoint buttons
+ * (**) + 0 trackpoint buttons
+ * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps
+ */
+static inline int elantech_is_buttonpad(struct elantech_device_info *info)
+{
+	return info->fw_version & 0x001000;
+}
+
 /*
  * Interpret complete data packets and report absolute mode input events for
  * hardware version 1. (4 byte packets)
@@ -523,7 +569,7 @@ static void elantech_report_absolute_v3(struct psmouse *psmouse,
 	input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
 
 	/* For clickpads map both buttons to BTN_LEFT */
-	if (etd->info.fw_version & 0x001000)
+	if (elantech_is_buttonpad(&etd->info))
 		input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
 	else
 		psmouse_report_standard_buttons(dev, packet[0]);
@@ -541,7 +587,7 @@ static void elantech_input_sync_v4(struct psmouse *psmouse)
 	unsigned char *packet = psmouse->packet;
 
 	/* For clickpads map both buttons to BTN_LEFT */
-	if (etd->info.fw_version & 0x001000)
+	if (elantech_is_buttonpad(&etd->info))
 		input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
 	else
 		psmouse_report_standard_buttons(dev, packet[0]);
@@ -991,88 +1037,6 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
 	return rc;
 }
 
-static int elantech_set_range(struct psmouse *psmouse,
-			      unsigned int *x_min, unsigned int *y_min,
-			      unsigned int *x_max, unsigned int *y_max,
-			      unsigned int *width)
-{
-	struct elantech_data *etd = psmouse->private;
-	struct elantech_device_info *info = &etd->info;
-	unsigned char param[3];
-	unsigned char traces;
-
-	switch (info->hw_version) {
-	case 1:
-		*x_min = ETP_XMIN_V1;
-		*y_min = ETP_YMIN_V1;
-		*x_max = ETP_XMAX_V1;
-		*y_max = ETP_YMAX_V1;
-		break;
-
-	case 2:
-		if (info->fw_version == 0x020800 ||
-		    info->fw_version == 0x020b00 ||
-		    info->fw_version == 0x020030) {
-			*x_min = ETP_XMIN_V2;
-			*y_min = ETP_YMIN_V2;
-			*x_max = ETP_XMAX_V2;
-			*y_max = ETP_YMAX_V2;
-		} else {
-			int i;
-			int fixed_dpi;
-
-			i = (info->fw_version > 0x020800 &&
-			     info->fw_version < 0x020900) ? 1 : 2;
-
-			if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
-				return -1;
-
-			fixed_dpi = param[1] & 0x10;
-
-			if (((info->fw_version >> 16) == 0x14) && fixed_dpi) {
-				if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
-					return -1;
-
-				*x_max = (info->capabilities[1] - i) * param[1] / 2;
-				*y_max = (info->capabilities[2] - i) * param[2] / 2;
-			} else if (info->fw_version == 0x040216) {
-				*x_max = 819;
-				*y_max = 405;
-			} else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) {
-				*x_max = 900;
-				*y_max = 500;
-			} else {
-				*x_max = (info->capabilities[1] - i) * 64;
-				*y_max = (info->capabilities[2] - i) * 64;
-			}
-		}
-		break;
-
-	case 3:
-		if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
-			return -1;
-
-		*x_max = (0x0f & param[0]) << 8 | param[1];
-		*y_max = (0xf0 & param[0]) << 4 | param[2];
-		break;
-
-	case 4:
-		if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
-			return -1;
-
-		*x_max = (0x0f & param[0]) << 8 | param[1];
-		*y_max = (0xf0 & param[0]) << 4 | param[2];
-		traces = info->capabilities[1];
-		if ((traces < 2) || (traces > *x_max))
-			return -1;
-
-		*width = *x_max / (traces - 1);
-		break;
-	}
-
-	return 0;
-}
-
 /*
  * (value from firmware) * 10 + 790 = dpi
  * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
@@ -1099,53 +1063,12 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse,
 	return 0;
 }
 
-/*
- * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in
- * fw_version for this is based on the following fw_version & caps table:
- *
- * Laptop-model:           fw_version:     caps:           buttons:
- * Acer S3                 0x461f00        10, 13, 0e      clickpad
- * Acer S7-392             0x581f01        50, 17, 0d      clickpad
- * Acer V5-131             0x461f02        01, 16, 0c      clickpad
- * Acer V5-551             0x461f00        ?               clickpad
- * Asus K53SV              0x450f01        78, 15, 0c      2 hw buttons
- * Asus G46VW              0x460f02        00, 18, 0c      2 hw buttons
- * Asus G750JX             0x360f00        00, 16, 0c      2 hw buttons
- * Asus TP500LN            0x381f17        10, 14, 0e      clickpad
- * Asus X750JN             0x381f17        10, 14, 0e      clickpad
- * Asus UX31               0x361f00        20, 15, 0e      clickpad
- * Asus UX32VD             0x361f02        00, 15, 0e      clickpad
- * Avatar AVIU-145A2       0x361f00        ?               clickpad
- * Fujitsu CELSIUS H760    0x570f02        40, 14, 0c      3 hw buttons (**)
- * Fujitsu CELSIUS H780    0x5d0f02        41, 16, 0d      3 hw buttons (**)
- * Fujitsu LIFEBOOK E544   0x470f00        d0, 12, 09      2 hw buttons
- * Fujitsu LIFEBOOK E546   0x470f00        50, 12, 09      2 hw buttons
- * Fujitsu LIFEBOOK E547   0x470f00        50, 12, 09      2 hw buttons
- * Fujitsu LIFEBOOK E554   0x570f01        40, 14, 0c      2 hw buttons
- * Fujitsu LIFEBOOK E557   0x570f01        40, 14, 0c      2 hw buttons
- * Fujitsu T725            0x470f01        05, 12, 09      2 hw buttons
- * Fujitsu H730            0x570f00        c0, 14, 0c      3 hw buttons (**)
- * Gigabyte U2442          0x450f01        58, 17, 0c      2 hw buttons
- * Lenovo L430             0x350f02        b9, 15, 0c      2 hw buttons (*)
- * Lenovo L530             0x350f02        b9, 15, 0c      2 hw buttons (*)
- * Samsung NF210           0x150b00        78, 14, 0a      2 hw buttons
- * Samsung NP770Z5E        0x575f01        10, 15, 0f      clickpad
- * Samsung NP700Z5B        0x361f06        21, 15, 0f      clickpad
- * Samsung NP900X3E-A02    0x575f03        ?               clickpad
- * Samsung NP-QX410        0x851b00        19, 14, 0c      clickpad
- * Samsung RC512           0x450f00        08, 15, 0c      2 hw buttons
- * Samsung RF710           0x450f00        ?               2 hw buttons
- * System76 Pangolin       0x250f01        ?               2 hw buttons
- * (*) + 3 trackpoint buttons
- * (**) + 0 trackpoint buttons
- * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps
- */
 static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
 {
 	struct input_dev *dev = psmouse->dev;
 	struct elantech_data *etd = psmouse->private;
 
-	if (etd->info.fw_version & 0x001000) {
+	if (elantech_is_buttonpad(&etd->info)) {
 		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
 		__clear_bit(BTN_RIGHT, dev->keybit);
 	}
@@ -1181,16 +1104,6 @@ static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
 	{ }
 };
 
-static const char * const middle_button_pnp_ids[] = {
-	"LEN2131", /* ThinkPad P52 w/ NFC */
-	"LEN2132", /* ThinkPad P52 */
-	"LEN2133", /* ThinkPad P72 w/ NFC */
-	"LEN2134", /* ThinkPad P72 */
-	"LEN0407",
-	"LEN0408",
-	NULL
-};
-
 /*
  * Set the appropriate event bits for the input subsystem
  */
@@ -1199,10 +1112,9 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 	struct input_dev *dev = psmouse->dev;
 	struct elantech_data *etd = psmouse->private;
 	struct elantech_device_info *info = &etd->info;
-	unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
-
-	if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
-		return -1;
+	unsigned int x_min = info->x_min, y_min = info->y_min,
+		     x_max = info->x_max, y_max = info->y_max,
+		     width = info->width;
 
 	__set_bit(INPUT_PROP_POINTER, dev->propbit);
 	__set_bit(EV_KEY, dev->evbit);
@@ -1210,8 +1122,7 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 	__clear_bit(EV_REL, dev->evbit);
 
 	__set_bit(BTN_LEFT, dev->keybit);
-	if (dmi_check_system(elantech_dmi_has_middle_button) ||
-			psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids))
+	if (info->has_middle_button)
 		__set_bit(BTN_MIDDLE, dev->keybit);
 	__set_bit(BTN_RIGHT, dev->keybit);
 
@@ -1686,6 +1597,7 @@ static int elantech_query_info(struct psmouse *psmouse,
 			       struct elantech_device_info *info)
 {
 	unsigned char param[3];
+	unsigned char traces;
 
 	memset(info, 0, sizeof(*info));
 
@@ -1754,6 +1666,90 @@ static int elantech_query_info(struct psmouse *psmouse,
 		}
 	}
 
+	/* query range information */
+	switch (info->hw_version) {
+	case 1:
+		info->x_min = ETP_XMIN_V1;
+		info->y_min = ETP_YMIN_V1;
+		info->x_max = ETP_XMAX_V1;
+		info->y_max = ETP_YMAX_V1;
+		break;
+
+	case 2:
+		if (info->fw_version == 0x020800 ||
+		    info->fw_version == 0x020b00 ||
+		    info->fw_version == 0x020030) {
+			info->x_min = ETP_XMIN_V2;
+			info->y_min = ETP_YMIN_V2;
+			info->x_max = ETP_XMAX_V2;
+			info->y_max = ETP_YMAX_V2;
+		} else {
+			int i;
+			int fixed_dpi;
+
+			i = (info->fw_version > 0x020800 &&
+			     info->fw_version < 0x020900) ? 1 : 2;
+
+			if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+				return -EINVAL;
+
+			fixed_dpi = param[1] & 0x10;
+
+			if (((info->fw_version >> 16) == 0x14) && fixed_dpi) {
+				if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
+					return -EINVAL;
+
+				info->x_max = (info->capabilities[1] - i) * param[1] / 2;
+				info->y_max = (info->capabilities[2] - i) * param[2] / 2;
+			} else if (info->fw_version == 0x040216) {
+				info->x_max = 819;
+				info->y_max = 405;
+			} else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) {
+				info->x_max = 900;
+				info->y_max = 500;
+			} else {
+				info->x_max = (info->capabilities[1] - i) * 64;
+				info->y_max = (info->capabilities[2] - i) * 64;
+			}
+		}
+		break;
+
+	case 3:
+		if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+			return -EINVAL;
+
+		info->x_max = (0x0f & param[0]) << 8 | param[1];
+		info->y_max = (0xf0 & param[0]) << 4 | param[2];
+		break;
+
+	case 4:
+		if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
+			return -EINVAL;
+
+		info->x_max = (0x0f & param[0]) << 8 | param[1];
+		info->y_max = (0xf0 & param[0]) << 4 | param[2];
+		traces = info->capabilities[1];
+		if ((traces < 2) || (traces > info->x_max))
+			return -EINVAL;
+
+		info->width = info->x_max / (traces - 1);
+
+		/* column number of traces */
+		info->x_traces = traces;
+
+		/* row number of traces */
+		traces = info->capabilities[2];
+		if ((traces >= 2) && (traces <= info->y_max))
+			info->y_traces = traces;
+
+		break;
+	}
+
+	/* check for the middle button: DMI matching or new v4 firmwares */
+	info->has_middle_button = dmi_check_system(elantech_dmi_has_middle_button) ||
+				  (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) &&
+				   !elantech_is_buttonpad(info));
+
 	return 0;
 }
 
@@ -1780,10 +1776,6 @@ static const char * const i2c_blacklist_pnp_ids[] = {
 	 * These are known to not be working properly as bits are missing
 	 * in elan_i2c.
 	 */
-	"LEN2131", /* ThinkPad P52 w/ NFC */
-	"LEN2132", /* ThinkPad P52 */
-	"LEN2133", /* ThinkPad P72 w/ NFC */
-	"LEN2134", /* ThinkPad P72 */
 	NULL
 };
 
@@ -1791,17 +1783,45 @@ static int elantech_create_smbus(struct psmouse *psmouse,
 				 struct elantech_device_info *info,
 				 bool leave_breadcrumbs)
 {
-	const struct property_entry i2c_properties[] = {
-		PROPERTY_ENTRY_BOOL("elan,trackpoint"),
-		{ },
-	};
+	struct property_entry i2c_props[11] = {};
 	struct i2c_board_info smbus_board = {
 		I2C_BOARD_INFO("elan_i2c", 0x15),
 		.flags = I2C_CLIENT_HOST_NOTIFY,
 	};
+	unsigned int idx = 0;
+
+	smbus_board.properties = i2c_props;
+
+	i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-x",
+						   info->x_max + 1);
+	i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-size-y",
+						   info->y_max + 1);
+	i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-x",
+						   info->x_min);
+	i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-min-y",
+						   info->y_min);
+	if (info->x_res)
+		i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-x-mm",
+						      (info->x_max + 1) / info->x_res);
+	if (info->y_res)
+		i2c_props[idx++] = PROPERTY_ENTRY_U32("touchscreen-y-mm",
+						      (info->y_max + 1) / info->y_res);
 
 	if (info->has_trackpoint)
-		smbus_board.properties = i2c_properties;
+		i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,trackpoint");
+
+	if (info->has_middle_button)
+		i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,middle-button");
+
+	if (info->x_traces)
+		i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,x_traces",
+						      info->x_traces);
+	if (info->y_traces)
+		i2c_props[idx++] = PROPERTY_ENTRY_U32("elan,y_traces",
+						      info->y_traces);
+
+	if (elantech_is_buttonpad(info))
+		i2c_props[idx++] = PROPERTY_ENTRY_BOOL("elan,clickpad");
 
 	return psmouse_smbus_init(psmouse, &smbus_board, NULL, 0, false,
 				  leave_breadcrumbs);

drivers/input/mouse/elantech.h

@@ -141,8 +141,15 @@ struct elantech_device_info {
 	unsigned char debug;
 	unsigned char hw_version;
 	unsigned int fw_version;
+	unsigned int x_min;
+	unsigned int y_min;
+	unsigned int x_max;
+	unsigned int y_max;
 	unsigned int x_res;
 	unsigned int y_res;
+	unsigned int x_traces;
+	unsigned int y_traces;
+	unsigned int width;
 	unsigned int bus;
 	bool paritycheck;
 	bool jumpy_cursor;
@@ -150,6 +157,7 @@ struct elantech_device_info {
 	bool crc_enabled;
 	bool set_hw_resolution;
 	bool has_trackpoint;
+	bool has_middle_button;
 	int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
 			unsigned char *param);
 };

drivers/input/mouse/synaptics.c

@@ -173,6 +173,7 @@ static const char * const smbus_pnp_ids[] = {
 	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 	"LEN0073", /* X1 Carbon G5 (Elantech) */
 	"LEN0092", /* X1 Carbon 6 */
+	"LEN0093", /* T480 */
 	"LEN0096", /* X280 */
 	"LEN0097", /* X280 -> ALPS trackpoint */
 	"LEN200f", /* T450s */

drivers/input/rmi4/rmi_f12.c

@@ -70,7 +70,6 @@ static int rmi_f12_read_sensor_tuning(struct f12_data *f12)
 	int pitch_y = 0;
 	int rx_receivers = 0;
 	int tx_receivers = 0;
-	int sensor_flags = 0;
 
 	item = rmi_get_register_desc_item(&f12->control_reg_desc, 8);
 	if (!item) {
@@ -126,10 +125,9 @@ static int rmi_f12_read_sensor_tuning(struct f12_data *f12)
 		offset += 2;
 	}
 
-	if (rmi_register_desc_has_subpacket(item, 4)) {
-		sensor_flags = buf[offset];
+	/* Skip over sensor flags */
+	if (rmi_register_desc_has_subpacket(item, 4))
 		offset += 1;
-	}
 
 	sensor->x_mm = (pitch_x * rx_receivers) >> 12;
 	sensor->y_mm = (pitch_y * tx_receivers) >> 12;

drivers/input/touchscreen/atmel_mxt_ts.c

@@ -256,16 +256,6 @@ enum v4l_dbg_inputs {
 	MXT_V4L_INPUT_MAX,
 };
 
-static const struct v4l2_file_operations mxt_video_fops = {
-	.owner = THIS_MODULE,
-	.open = v4l2_fh_open,
-	.release = vb2_fop_release,
-	.unlocked_ioctl = video_ioctl2,
-	.read = vb2_fop_read,
-	.mmap = vb2_fop_mmap,
-	.poll = vb2_fop_poll,
-};
-
 enum mxt_suspend_mode {
 	MXT_SUSPEND_DEEP_SLEEP	= 0,
 	MXT_SUSPEND_T9_CTRL	= 1,
@@ -1521,7 +1511,8 @@ static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw)
 		} else if (config_crc == data->config_crc) {
 			dev_dbg(dev, "Config CRC 0x%06X: OK\n",
 				 data->config_crc);
-			return 0;
+			ret = 0;
+			goto release_raw;
 		} else {
 			dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
 				 data->config_crc, config_crc);
@@ -2218,6 +2209,16 @@ static int mxt_init_t7_power_cfg(struct mxt_data *data)
 }
 
 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
+static const struct v4l2_file_operations mxt_video_fops = {
+	.owner = THIS_MODULE,
+	.open = v4l2_fh_open,
+	.release = vb2_fop_release,
+	.unlocked_ioctl = video_ioctl2,
+	.read = vb2_fop_read,
+	.mmap = vb2_fop_mmap,
+	.poll = vb2_fop_poll,
+};
+
 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
 			       unsigned int y)
 {

drivers/input/touchscreen/edt-ft5x06.c

@@ -27,6 +27,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/input/mt.h>
 #include <linux/input/touchscreen.h>
+#include <asm/unaligned.h>
 
 #define WORK_REGISTER_THRESHOLD		0x00
 #define WORK_REGISTER_REPORT_RATE	0x08
@@ -228,7 +229,6 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 
 	for (i = 0; i < tsdata->max_support_points; i++) {
 		u8 *buf = &rdbuf[i * tplen + offset];
-		bool down;
 
 		type = buf[0] >> 6;
 		/* ignore Reserved events */
@@ -239,23 +239,19 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 		if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
 			continue;
 
-		x = ((buf[0] << 8) | buf[1]) & 0x0fff;
-		y = ((buf[2] << 8) | buf[3]) & 0x0fff;
+		x = get_unaligned_be16(buf) & 0x0fff;
+		y = get_unaligned_be16(buf + 2) & 0x0fff;
 		/* The FT5x26 send the y coordinate first */
 		if (tsdata->version == EV_FT)
 			swap(x, y);
 
 		id = (buf[2] >> 4) & 0x0f;
-		down = type != TOUCH_EVENT_UP;
 
 		input_mt_slot(tsdata->input, id);
-		input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
-
-		if (!down)
-			continue;
-
-		touchscreen_report_pos(tsdata->input, &tsdata->prop, x, y,
-				       true);
+		if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
+					       type != TOUCH_EVENT_UP))
+			touchscreen_report_pos(tsdata->input, &tsdata->prop,
+					       x, y, true);
 	}
 
 	input_mt_report_pointer_emulation(tsdata->input, true);

drivers/input/touchscreen/eeti_ts.c

@@ -28,6 +28,7 @@ struct eeti_ts {
 	struct input_dev *input;
 	struct gpio_desc *attn_gpio;
 	struct touchscreen_properties props;
+	struct mutex mutex;
 	bool running;
 };
 
@@ -62,42 +63,80 @@ static void eeti_ts_report_event(struct eeti_ts *eeti, u8 *buf)
 	input_sync(eeti->input);
 }
 
+static int eeti_ts_read(struct eeti_ts *eeti)
+{
+	int len, error;
+	char buf[6];
+
+	len = i2c_master_recv(eeti->client, buf, sizeof(buf));
+	if (len != sizeof(buf)) {
+		error = len < 0 ? len : -EIO;
+		dev_err(&eeti->client->dev,
+			"failed to read touchscreen data: %d\n",
+			error);
+		return error;
+	}
+
+	/* Motion packet */
+	if (buf[0] & 0x80)
+		eeti_ts_report_event(eeti, buf);
+
+	return 0;
+}
+
 static irqreturn_t eeti_ts_isr(int irq, void *dev_id)
 {
 	struct eeti_ts *eeti = dev_id;
-	int len;
 	int error;
-	char buf[6];
+
+	mutex_lock(&eeti->mutex);
 
 	do {
-		len = i2c_master_recv(eeti->client, buf, sizeof(buf));
-		if (len != sizeof(buf)) {
-			error = len < 0 ? len : -EIO;
-			dev_err(&eeti->client->dev,
-				"failed to read touchscreen data: %d\n",
-				error);
+		/*
+		 * If we have attention GPIO, trust it. Otherwise we'll read
+		 * once and exit. We assume that in this case we are using
+		 * level triggered interrupt and it will get raised again
+		 * if/when there is more data.
+		 */
+		if (eeti->attn_gpio &&
+		    !gpiod_get_value_cansleep(eeti->attn_gpio)) {
 			break;
 		}
 
-		if (buf[0] & 0x80) {
-			/* Motion packet */
-			eeti_ts_report_event(eeti, buf);
-		}
-	} while (eeti->running &&
-		 eeti->attn_gpio && gpiod_get_value_cansleep(eeti->attn_gpio));
+		error = eeti_ts_read(eeti);
+		if (error)
+			break;
+
+	} while (eeti->running && eeti->attn_gpio);
 
+	mutex_unlock(&eeti->mutex);
 	return IRQ_HANDLED;
 }
 
 static void eeti_ts_start(struct eeti_ts *eeti)
 {
+	mutex_lock(&eeti->mutex);
+
 	eeti->running = true;
-	wmb();
 	enable_irq(eeti->client->irq);
+
+	/*
+	 * Kick the controller in case we are using edge interrupt and
+	 * we missed our edge while interrupt was disabled. We expect
+	 * the attention GPIO to be wired in this case.
+	 */
+	if (eeti->attn_gpio && gpiod_get_value_cansleep(eeti->attn_gpio))
+		eeti_ts_read(eeti);
+
+	mutex_unlock(&eeti->mutex);
 }
 
 static void eeti_ts_stop(struct eeti_ts *eeti)
 {
+	/*
+	 * Not locking here, just setting a flag and expect that the
+	 * interrupt thread will notice the flag eventually.
+	 */
 	eeti->running = false;
 	wmb();
 	disable_irq(eeti->client->irq);
@@ -140,6 +179,8 @@ static int eeti_ts_probe(struct i2c_client *client,
 		return -ENOMEM;
 	}
 
+	mutex_init(&eeti->mutex);
+
 	input = devm_input_allocate_device(dev);
 	if (!input) {
 		dev_err(dev, "Failed to allocate input device.\n");

drivers/input/touchscreen/imx6ul_tsc.c

@@ -364,8 +364,6 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct imx6ul_tsc *tsc;
 	struct input_dev *input_dev;
-	struct resource *tsc_mem;
-	struct resource *adc_mem;
 	int err;
 	int tsc_irq;
 	int adc_irq;
@@ -403,16 +401,14 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	tsc_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	tsc->tsc_regs = devm_ioremap_resource(&pdev->dev, tsc_mem);
+	tsc->tsc_regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(tsc->tsc_regs)) {
 		err = PTR_ERR(tsc->tsc_regs);
 		dev_err(&pdev->dev, "failed to remap tsc memory: %d\n", err);
 		return err;
 	}
 
-	adc_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	tsc->adc_regs = devm_ioremap_resource(&pdev->dev, adc_mem);
+	tsc->adc_regs = devm_platform_ioremap_resource(pdev, 1);
 	if (IS_ERR(tsc->adc_regs)) {
 		err = PTR_ERR(tsc->adc_regs);
 		dev_err(&pdev->dev, "failed to remap adc memory: %d\n", err);

drivers/input/touchscreen/iqs5xx.c

@@ -1056,8 +1056,6 @@ static int iqs5xx_probe(struct i2c_client *client,
 	if (!iqs5xx)
 		return -ENOMEM;
 
-	dev_set_drvdata(&client->dev, iqs5xx);
-
 	i2c_set_clientdata(client, iqs5xx);
 	iqs5xx->client = client;
 

include/linux/input/elan-i2c-ids.h

+/*
+ * Elan I2C/SMBus Touchpad device whitelist
+ *
+ * Copyright (c) 2013 ELAN Microelectronics Corp.
+ *
+ * Author: æ維 (Duson Lin) <dusonlin@emc.com.tw>
+ * Author: KT Liao <kt.liao@emc.com.tw>
+ * Version: 1.6.3
+ *
+ * Based on cyapa driver:
+ * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
+ * copyright (c) 2011-2012 Google, Inc.
+ *
+ * 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.
+ *
+ * Trademarks are the property of their respective owners.
+ */
+
+#ifndef __ELAN_I2C_IDS_H
+#define __ELAN_I2C_IDS_H
+
+#include <linux/mod_devicetable.h>
+
+static const struct acpi_device_id elan_acpi_id[] = {
+	{ "ELAN0000", 0 },
+	{ "ELAN0100", 0 },
+	{ "ELAN0600", 0 },
+	{ "ELAN0601", 0 },
+	{ "ELAN0602", 0 },
+	{ "ELAN0603", 0 },
+	{ "ELAN0604", 0 },
+	{ "ELAN0605", 0 },
+	{ "ELAN0606", 0 },
+	{ "ELAN0607", 0 },
+	{ "ELAN0608", 0 },
+	{ "ELAN0609", 0 },
+	{ "ELAN060B", 0 },
+	{ "ELAN060C", 0 },
+	{ "ELAN060F", 0 },
+	{ "ELAN0610", 0 },
+	{ "ELAN0611", 0 },
+	{ "ELAN0612", 0 },
+	{ "ELAN0615", 0 },
+	{ "ELAN0616", 0 },
+	{ "ELAN0617", 0 },
+	{ "ELAN0618", 0 },
+	{ "ELAN0619", 0 },
+	{ "ELAN061A", 0 },
+	{ "ELAN061B", 0 },
+	{ "ELAN061C", 0 },
+	{ "ELAN061D", 0 },
+	{ "ELAN061E", 0 },
+	{ "ELAN061F", 0 },
+	{ "ELAN0620", 0 },
+	{ "ELAN0621", 0 },
+	{ "ELAN0622", 0 },
+	{ "ELAN0623", 0 },
+	{ "ELAN0624", 0 },
+	{ "ELAN0625", 0 },
+	{ "ELAN0626", 0 },
+	{ "ELAN0627", 0 },
+	{ "ELAN0628", 0 },
+	{ "ELAN0629", 0 },
+	{ "ELAN062A", 0 },
+	{ "ELAN062B", 0 },
+	{ "ELAN062C", 0 },
+	{ "ELAN062D", 0 },
+	{ "ELAN0631", 0 },
+	{ "ELAN0632", 0 },
+	{ "ELAN1000", 0 },
+	{ }
+};
+
+#endif /* __ELAN_I2C_IDS_H */