Merge tag 'for-linus-2022121301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid

Pull HID updates from Jiri Kosina:

 - iio support for the MCP2221 HID driver (Matt Ranostay)

 - support for more than one hinge sensor in hid-sensor-custom (Yauhen
   Kharuzhy)

 - PS DualShock 4 controller support (Roderick Colenbrander)

 - XP-PEN Deco LW support (José Expósito)

 - other assorted code cleanups and device ID/quirk addtions

* tag 'for-linus-2022121301' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: (51 commits)
  HID: logitech HID++: Send SwID in GetProtocolVersion
  HID: hid-elan: use default remove for hid device
  HID: hid-alps: use default remove for hid device
  HID: hid-sensor-custom: set fixed size for custom attributes
  HID: i2c: let RMI devices decide what constitutes wakeup event
  HID: playstation: fix DualShock4 bluetooth CRC endian issue.
  HID: playstation: fix DualShock4 bluetooth memory corruption bug.
  HID: apple: Swap Control and Command keys on Apple keyboards
  HID: intel-ish-hid: ishtp: remove variable rb_count
  HID: uclogic: Standardize test name prefix
  HID: hid-sensor-custom: Allow more than one hinge angle sensor
  HID: ft260: fix 'cast to restricted' kernel CI bot warnings
  HID: ft260: missed NACK from busy device
  HID: ft260: fix a NULL pointer dereference in ft260_i2c_write
  HID: ft260: wake up device from power saving mode
  HID: ft260: missed NACK from big i2c read
  HID: ft260: remove SMBus Quick command support
  HID: ft260: skip unexpected HID input reports
  HID: ft260: do not populate /dev/hidraw device
  HID: ft260: improve i2c large reads performance
  ...

drivers/hid/Kconfig

@@ -1252,7 +1252,8 @@ config HID_ALPS
 config HID_MCP2221
 	tristate "Microchip MCP2221 HID USB-to-I2C/SMbus host support"
 	depends on USB_HID && I2C
-	depends on GPIOLIB
+	imply GPIOLIB
+	imply IIO
 	help
 	Provides I2C and SMBUS host adapter functionality over USB-HID
 	through MCP2221 device.

drivers/hid/hid-alps.c

@@ -820,11 +820,6 @@ static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	return 0;
 }
 
-static void alps_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-}
-
 static const struct hid_device_id alps_id[] = {
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
@@ -842,7 +837,6 @@ static struct hid_driver alps_driver = {
 	.name = "hid-alps",
 	.id_table		= alps_id,
 	.probe			= alps_probe,
-	.remove			= alps_remove,
 	.raw_event		= alps_raw_event,
 	.input_mapping		= alps_input_mapping,
 	.input_configured	= alps_input_configured,

drivers/hid/hid-apple.c

@@ -59,6 +59,12 @@ MODULE_PARM_DESC(swap_opt_cmd, "Swap the Option (\"Alt\") and Command (\"Flag\")
 		"(For people who want to keep Windows PC keyboard muscle memory. "
 		"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");
 
+static unsigned int swap_ctrl_cmd;
+module_param(swap_ctrl_cmd, uint, 0644);
+MODULE_PARM_DESC(swap_ctrl_cmd, "Swap the Control (\"Ctrl\") and Command (\"Flag\") keys. "
+		"(For people who are used to Mac shortcuts involving Command instead of Control. "
+		"[0] = No change. 1 = Swapped.)");
+
 static unsigned int swap_fn_leftctrl;
 module_param(swap_fn_leftctrl, uint, 0644);
 MODULE_PARM_DESC(swap_fn_leftctrl, "Swap the Fn and left Control keys. "
@@ -308,12 +314,21 @@ static const struct apple_key_translation swapped_option_cmd_keys[] = {
 	{ KEY_LEFTALT,	KEY_LEFTMETA },
 	{ KEY_LEFTMETA,	KEY_LEFTALT },
 	{ KEY_RIGHTALT,	KEY_RIGHTMETA },
-	{ KEY_RIGHTMETA,KEY_RIGHTALT },
+	{ KEY_RIGHTMETA, KEY_RIGHTALT },
+	{ }
+};
+
+static const struct apple_key_translation swapped_ctrl_cmd_keys[] = {
+	{ KEY_LEFTCTRL,	KEY_LEFTMETA },
+	{ KEY_LEFTMETA,	KEY_LEFTCTRL },
+	{ KEY_RIGHTCTRL, KEY_RIGHTMETA },
+	{ KEY_RIGHTMETA, KEY_RIGHTCTRL },
 	{ }
 };
 
 static const struct apple_key_translation swapped_fn_leftctrl_keys[] = {
 	{ KEY_FN, KEY_LEFTCTRL },
+	{ KEY_LEFTCTRL, KEY_FN },
 	{ }
 };
 
@@ -375,24 +390,47 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 	struct apple_sc *asc = hid_get_drvdata(hid);
 	const struct apple_key_translation *trans, *table;
 	bool do_translate;
-	u16 code = 0;
+	u16 code = usage->code;
 	unsigned int real_fnmode;
 
-	u16 fn_keycode = (swap_fn_leftctrl) ? (KEY_LEFTCTRL) : (KEY_FN);
-
-	if (usage->code == fn_keycode) {
-		asc->fn_on = !!value;
-		input_event_with_scancode(input, usage->type, KEY_FN,
-				usage->hid, value);
-		return 1;
-	}
-
 	if (fnmode == 3) {
 		real_fnmode = (asc->quirks & APPLE_IS_NON_APPLE) ? 2 : 1;
 	} else {
 		real_fnmode = fnmode;
 	}
 
+	if (swap_fn_leftctrl) {
+		trans = apple_find_translation(swapped_fn_leftctrl_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (iso_layout > 0 || (iso_layout < 0 && (asc->quirks & APPLE_ISO_TILDE_QUIRK) &&
+			hid->country == HID_COUNTRY_INTERNATIONAL_ISO)) {
+		trans = apple_find_translation(apple_iso_keyboard, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (swap_opt_cmd) {
+		trans = apple_find_translation(swapped_option_cmd_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (swap_ctrl_cmd) {
+		trans = apple_find_translation(swapped_ctrl_cmd_keys, code);
+
+		if (trans)
+			code = trans->to;
+	}
+
+	if (code == KEY_FN)
+		asc->fn_on = !!value;
+
 	if (real_fnmode) {
 		if (hid->product == USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI ||
 		    hid->product == USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO ||
@@ -430,15 +468,18 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 		else
 			table = apple_fn_keys;
 
-		trans = apple_find_translation (table, usage->code);
+		trans = apple_find_translation(table, code);
 
 		if (trans) {
-			if (test_bit(trans->from, input->key))
+			bool from_is_set = test_bit(trans->from, input->key);
+			bool to_is_set = test_bit(trans->to, input->key);
+
+			if (from_is_set)
 				code = trans->from;
-			else if (test_bit(trans->to, input->key))
+			else if (to_is_set)
 				code = trans->to;
 
-			if (!code) {
+			if (!(from_is_set || to_is_set)) {
 				if (trans->flags & APPLE_FLAG_FKEY) {
 					switch (real_fnmode) {
 					case 1:
@@ -455,63 +496,32 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 					do_translate = asc->fn_on;
 				}
 
-				code = do_translate ? trans->to : trans->from;
+				if (do_translate)
+					code = trans->to;
 			}
-
-			input_event_with_scancode(input, usage->type, code,
-					usage->hid, value);
-			return 1;
 		}
 
 		if (asc->quirks & APPLE_NUMLOCK_EMULATION &&
-				(test_bit(usage->code, asc->pressed_numlock) ||
+				(test_bit(code, asc->pressed_numlock) ||
 				test_bit(LED_NUML, input->led))) {
-			trans = apple_find_translation(powerbook_numlock_keys,
-					usage->code);
+			trans = apple_find_translation(powerbook_numlock_keys, code);
 
 			if (trans) {
 				if (value)
-					set_bit(usage->code,
-							asc->pressed_numlock);
+					set_bit(code, asc->pressed_numlock);
 				else
-					clear_bit(usage->code,
-							asc->pressed_numlock);
+					clear_bit(code, asc->pressed_numlock);
 
-				input_event_with_scancode(input, usage->type,
-						trans->to, usage->hid, value);
+				code = trans->to;
 			}
-
-			return 1;
 		}
 	}
 
-	if (iso_layout > 0 || (iso_layout < 0 && (asc->quirks & APPLE_ISO_TILDE_QUIRK) &&
-			hid->country == HID_COUNTRY_INTERNATIONAL_ISO)) {
-		trans = apple_find_translation(apple_iso_keyboard, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
-			return 1;
-		}
-	}
+	if (usage->code != code) {
+		input_event_with_scancode(input, usage->type, code, usage->hid, value);
 
-	if (swap_opt_cmd) {
-		trans = apple_find_translation(swapped_option_cmd_keys, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
 		return 1;
 	}
-	}
-
-	if (swap_fn_leftctrl) {
-		trans = apple_find_translation(swapped_fn_leftctrl_keys, usage->code);
-		if (trans) {
-			input_event_with_scancode(input, usage->type,
-					trans->to, usage->hid, value);
-			return 1;
-		}
-	}
 
 	return 0;
 }
@@ -640,9 +650,6 @@ static void apple_setup_input(struct input_dev *input)
 	apple_setup_key_translation(input, apple2021_fn_keys);
 	apple_setup_key_translation(input, macbookpro_no_esc_fn_keys);
 	apple_setup_key_translation(input, macbookpro_dedicated_esc_fn_keys);
-
-	if (swap_fn_leftctrl)
-		apple_setup_key_translation(input, swapped_fn_leftctrl_keys);
 }
 
 static int apple_input_mapping(struct hid_device *hdev, struct hid_input *hi,
@@ -1011,21 +1018,21 @@ static const struct hid_device_id apple_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING9_JIS),
 		.driver_data = APPLE_HAS_FN | APPLE_RDESC_JIS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J140K),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J132),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J680),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J213),
-		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL },
+		.driver_data = APPLE_HAS_FN | APPLE_BACKLIGHT_CTL | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J214K),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J223),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J230K),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRINGT2_J152F),
-		.driver_data = APPLE_HAS_FN },
+		.driver_data = APPLE_HAS_FN | APPLE_ISO_TILDE_QUIRK },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 		.driver_data = APPLE_NUMLOCK_EMULATION | APPLE_HAS_FN },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),

drivers/hid/hid-elan.c

@@ -507,11 +507,6 @@ static int elan_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	return ret;
 }
 
-static void elan_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-}
-
 static const struct hid_device_id elan_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_HP_X2),
 	  .driver_data = ELAN_HAS_LED },
@@ -529,7 +524,6 @@ static struct hid_driver elan_driver = {
 	.input_configured = elan_input_configured,
 	.raw_event = elan_raw_event,
 	.probe = elan_probe,
-	.remove = elan_remove,
 };
 
 module_hid_driver(elan_driver);

drivers/hid/hid-hyperv.c

@@ -22,9 +22,6 @@ struct hv_input_dev_info {
 	unsigned short reserved[11];
 };
 
-/* The maximum size of a synthetic input message. */
-#define SYNTHHID_MAX_INPUT_REPORT_SIZE 16
-
 /*
  * Current version
  *
@@ -59,11 +56,6 @@ struct synthhid_msg_hdr {
 	u32 size;
 };
 
-struct synthhid_msg {
-	struct synthhid_msg_hdr header;
-	char data[1]; /* Enclosed message */
-};
-
 union synthhid_version {
 	struct {
 		u16 minor_version;
@@ -99,7 +91,7 @@ struct synthhid_device_info_ack {
 
 struct synthhid_input_report {
 	struct synthhid_msg_hdr header;
-	char buffer[1];
+	char buffer[];
 };
 
 #pragma pack(pop)
@@ -118,7 +110,7 @@ enum pipe_prot_msg_type {
 struct pipe_prt_msg {
 	enum pipe_prot_msg_type type;
 	u32 size;
-	char data[1];
+	char data[];
 };
 
 struct  mousevsc_prt_msg {
@@ -232,7 +224,7 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
 
 	ret = vmbus_sendpacket(input_device->device->channel,
 			&ack,
-			sizeof(struct pipe_prt_msg) - sizeof(unsigned char) +
+			sizeof(struct pipe_prt_msg) +
 			sizeof(struct synthhid_device_info_ack),
 			(unsigned long)&ack,
 			VM_PKT_DATA_INBAND,
@@ -251,7 +243,7 @@ static void mousevsc_on_receive(struct hv_device *device,
 				struct vmpacket_descriptor *packet)
 {
 	struct pipe_prt_msg *pipe_msg;
-	struct synthhid_msg *hid_msg;
+	struct synthhid_msg_hdr *hid_msg_hdr;
 	struct mousevsc_dev *input_dev = hv_get_drvdata(device);
 	struct synthhid_input_report *input_report;
 	size_t len;
@@ -262,25 +254,23 @@ static void mousevsc_on_receive(struct hv_device *device,
 	if (pipe_msg->type != PIPE_MESSAGE_DATA)
 		return;
 
-	hid_msg = (struct synthhid_msg *)pipe_msg->data;
+	hid_msg_hdr = (struct synthhid_msg_hdr *)pipe_msg->data;
 
-	switch (hid_msg->header.type) {
+	switch (hid_msg_hdr->type) {
 	case SYNTH_HID_PROTOCOL_RESPONSE:
 		/*
 		 * While it will be impossible for us to protect against
 		 * malicious/buggy hypervisor/host, add a check here to
 		 * ensure we don't corrupt memory.
 		 */
-		if ((pipe_msg->size + sizeof(struct pipe_prt_msg)
-			- sizeof(unsigned char))
+		if (struct_size(pipe_msg, data, pipe_msg->size)
 			> sizeof(struct mousevsc_prt_msg)) {
 			WARN_ON(1);
 			break;
 		}
 
 		memcpy(&input_dev->protocol_resp, pipe_msg,
-		       pipe_msg->size + sizeof(struct pipe_prt_msg) -
-		       sizeof(unsigned char));
+				struct_size(pipe_msg, data, pipe_msg->size));
 		complete(&input_dev->wait_event);
 		break;
 
@@ -311,7 +301,7 @@ static void mousevsc_on_receive(struct hv_device *device,
 		break;
 	default:
 		pr_err("unsupported hid msg type - type %d len %d\n",
-		       hid_msg->header.type, hid_msg->header.size);
+		       hid_msg_hdr->type, hid_msg_hdr->size);
 		break;
 	}
 
@@ -359,8 +349,7 @@ static int mousevsc_connect_to_vsp(struct hv_device *device)
 	request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
 
 	ret = vmbus_sendpacket(device->channel, request,
-				sizeof(struct pipe_prt_msg) -
-				sizeof(unsigned char) +
+				sizeof(struct pipe_prt_msg) +
 				sizeof(struct synthhid_protocol_request),
 				(unsigned long)request,
 				VM_PKT_DATA_INBAND,

drivers/hid/hid-input.c

@@ -340,6 +340,7 @@ static enum power_supply_property hidinput_battery_props[] = {
 #define HID_BATTERY_QUIRK_PERCENT	(1 << 0) /* always reports percent */
 #define HID_BATTERY_QUIRK_FEATURE	(1 << 1) /* ask for feature report */
 #define HID_BATTERY_QUIRK_IGNORE	(1 << 2) /* completely ignore the battery */
+#define HID_BATTERY_QUIRK_AVOID_QUERY	(1 << 3) /* do not query the battery */
 
 static const struct hid_device_id hid_battery_quirks[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
@@ -373,6 +374,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
 	  HID_BATTERY_QUIRK_IGNORE },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 	  HID_BATTERY_QUIRK_IGNORE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
+	  HID_BATTERY_QUIRK_AVOID_QUERY },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
 	  HID_BATTERY_QUIRK_IGNORE },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
@@ -554,6 +557,9 @@ static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 				   field->physical == HID_DG_STYLUS;
 
+	if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
+		dev->battery_avoid_query = true;
+
 	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 	if (IS_ERR(dev->battery)) {
 		error = PTR_ERR(dev->battery);

drivers/hid/hid-logitech-hidpp.c

@@ -895,7 +895,7 @@ static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
 	ret = hidpp_send_rap_command_sync(hidpp,
 			REPORT_ID_HIDPP_SHORT,
 			HIDPP_PAGE_ROOT_IDX,
-			CMD_ROOT_GET_PROTOCOL_VERSION,
+			CMD_ROOT_GET_PROTOCOL_VERSION | LINUX_KERNEL_SW_ID,
 			ping_data, sizeof(ping_data), &response);
 
 	if (ret == HIDPP_ERROR_INVALID_SUBID) {

drivers/hid/hid-mcp2221.c

@@ -10,12 +10,14 @@
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
+#include <linux/bitfield.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/hid.h>
 #include <linux/hidraw.h>
 #include <linux/i2c.h>
 #include <linux/gpio/driver.h>
+#include <linux/iio/iio.h>
 #include "hid-ids.h"
 
 /* Commands codes in a raw output report */
@@ -30,6 +32,9 @@ enum {
 	MCP2221_I2C_CANCEL = 0x10,
 	MCP2221_GPIO_SET = 0x50,
 	MCP2221_GPIO_GET = 0x51,
+	MCP2221_SET_SRAM_SETTINGS = 0x60,
+	MCP2221_GET_SRAM_SETTINGS = 0x61,
+	MCP2221_READ_FLASH_DATA = 0xb0,
 };
 
 /* Response codes in a raw input report */
@@ -89,6 +94,7 @@ struct mcp2221 {
 	struct i2c_adapter adapter;
 	struct mutex lock;
 	struct completion wait_in_report;
+	struct delayed_work init_work;
 	u8 *rxbuf;
 	u8 txbuf[64];
 	int rxbuf_idx;
@@ -97,6 +103,18 @@ struct mcp2221 {
 	struct gpio_chip *gc;
 	u8 gp_idx;
 	u8 gpio_dir;
+	u8 mode[4];
+#if IS_REACHABLE(CONFIG_IIO)
+	struct iio_chan_spec iio_channels[3];
+	u16 adc_values[3];
+	u8 adc_scale;
+	u8 dac_value;
+	u16 dac_scale;
+#endif
+};
+
+struct mcp2221_iio {
+	struct mcp2221 *mcp;
 };
 
 /*
@@ -567,6 +585,7 @@ static const struct i2c_algorithm mcp_i2c_algo = {
 	.functionality = mcp_i2c_func,
 };
 
+#if IS_REACHABLE(CONFIG_GPIOLIB)
 static int mcp_gpio_get(struct gpio_chip *gc,
 				unsigned int offset)
 {
@@ -670,6 +689,7 @@ static int mcp_gpio_get_direction(struct gpio_chip *gc,
 
 	return GPIO_LINE_DIRECTION_OUT;
 }
+#endif
 
 /* Gives current state of i2c engine inside mcp2221 */
 static int mcp_get_i2c_eng_state(struct mcp2221 *mcp,
@@ -745,6 +765,9 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 				break;
 			}
 			mcp->status = mcp_get_i2c_eng_state(mcp, data, 8);
+#if IS_REACHABLE(CONFIG_IIO)
+			memcpy(&mcp->adc_values, &data[50], sizeof(mcp->adc_values));
+#endif
 			break;
 		default:
 			mcp->status = -EIO;
@@ -816,6 +839,69 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 		complete(&mcp->wait_in_report);
 		break;
 
+	case MCP2221_SET_SRAM_SETTINGS:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			mcp->status = 0;
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
+	case MCP2221_GET_SRAM_SETTINGS:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			memcpy(&mcp->mode, &data[22], 4);
+#if IS_REACHABLE(CONFIG_IIO)
+			mcp->dac_value = data[6] & GENMASK(4, 0);
+#endif
+			mcp->status = 0;
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
+	case MCP2221_READ_FLASH_DATA:
+		switch (data[1]) {
+		case MCP2221_SUCCESS:
+			mcp->status = 0;
+
+			/* Only handles CHIP SETTINGS subpage currently */
+			if (mcp->txbuf[1] != 0) {
+				mcp->status = -EIO;
+				break;
+			}
+
+#if IS_REACHABLE(CONFIG_IIO)
+			{
+				u8 tmp;
+				/* DAC scale value */
+				tmp = FIELD_GET(GENMASK(7, 6), data[6]);
+				if ((data[6] & BIT(5)) && tmp)
+					mcp->dac_scale = tmp + 4;
+				else
+					mcp->dac_scale = 5;
+
+				/* ADC scale value */
+				tmp = FIELD_GET(GENMASK(4, 3), data[7]);
+				if ((data[7] & BIT(2)) && tmp)
+					mcp->adc_scale = tmp - 1;
+				else
+					mcp->adc_scale = 0;
+			}
+#endif
+
+			break;
+		default:
+			mcp->status = -EAGAIN;
+		}
+		complete(&mcp->wait_in_report);
+		break;
+
 	default:
 		mcp->status = -EIO;
 		complete(&mcp->wait_in_report);
@@ -824,6 +910,190 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 	return 1;
 }
 
+/* Device resource managed function for HID unregistration */
+static void mcp2221_hid_unregister(void *ptr)
+{
+	struct hid_device *hdev = ptr;
+
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+}
+
+/* This is needed to be sure hid_hw_stop() isn't called twice by the subsystem */
+static void mcp2221_remove(struct hid_device *hdev)
+{
+}
+
+#if IS_REACHABLE(CONFIG_IIO)
+static int mcp2221_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *channel, int *val,
+			    int *val2, long mask)
+{
+	struct mcp2221_iio *priv = iio_priv(indio_dev);
+	struct mcp2221 *mcp = priv->mcp;
+	int ret;
+
+	if (mask == IIO_CHAN_INFO_SCALE) {
+		if (channel->output)
+			*val = 1 << mcp->dac_scale;
+		else
+			*val = 1 << mcp->adc_scale;
+
+		return IIO_VAL_INT;
+	}
+
+	mutex_lock(&mcp->lock);
+
+	if (channel->output) {
+		*val = mcp->dac_value;
+		ret = IIO_VAL_INT;
+	} else {
+		/* Read ADC values */
+		ret = mcp_chk_last_cmd_status(mcp);
+
+		if (!ret) {
+			*val = le16_to_cpu((__force __le16) mcp->adc_values[channel->address]);
+			if (*val >= BIT(10))
+				ret =  -EINVAL;
+			else
+				ret = IIO_VAL_INT;
+		}
+	}
+
+	mutex_unlock(&mcp->lock);
+
+	return ret;
+}
+
+static int mcp2221_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mcp2221_iio *priv = iio_priv(indio_dev);
+	struct mcp2221 *mcp = priv->mcp;
+	int ret;
+
+	if (val < 0 || val >= BIT(5))
+		return -EINVAL;
+
+	mutex_lock(&mcp->lock);
+
+	memset(mcp->txbuf, 0, 12);
+	mcp->txbuf[0] = MCP2221_SET_SRAM_SETTINGS;
+	mcp->txbuf[4] = BIT(7) | val;
+
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 12);
+	if (!ret)
+		mcp->dac_value = val;
+
+	mutex_unlock(&mcp->lock);
+
+	return ret;
+}
+
+static const struct iio_info mcp2221_info = {
+	.read_raw = &mcp2221_read_raw,
+	.write_raw = &mcp2221_write_raw,
+};
+
+static int mcp_iio_channels(struct mcp2221 *mcp)
+{
+	int idx, cnt = 0;
+	bool dac_created = false;
+
+	/* GP0 doesn't have ADC/DAC alternative function */
+	for (idx = 1; idx < MCP_NGPIO; idx++) {
+		struct iio_chan_spec *chan = &mcp->iio_channels[cnt];
+
+		switch (mcp->mode[idx]) {
+		case 2:
+			chan->address = idx - 1;
+			chan->channel = cnt++;
+			break;
+		case 3:
+			/* GP1 doesn't have DAC alternative function */
+			if (idx == 1 || dac_created)
+				continue;
+			/* DAC1 and DAC2 outputs are connected to the same DAC */
+			dac_created = true;
+			chan->output = 1;
+			cnt++;
+			break;
+		default:
+			continue;
+		};
+
+		chan->type = IIO_VOLTAGE;
+		chan->indexed = 1;
+		chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+		chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE);
+		chan->scan_index = -1;
+	}
+
+	return cnt;
+}
+
+static void mcp_init_work(struct work_struct *work)
+{
+	struct iio_dev *indio_dev;
+	struct mcp2221 *mcp = container_of(work, struct mcp2221, init_work.work);
+	struct mcp2221_iio *data;
+	static int retries = 5;
+	int ret, num_channels;
+
+	hid_hw_power(mcp->hdev, PM_HINT_FULLON);
+	mutex_lock(&mcp->lock);
+
+	mcp->txbuf[0] = MCP2221_GET_SRAM_SETTINGS;
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 1);
+
+	if (ret == -EAGAIN)
+		goto reschedule_task;
+
+	num_channels = mcp_iio_channels(mcp);
+	if (!num_channels)
+		goto unlock;
+
+	mcp->txbuf[0] = MCP2221_READ_FLASH_DATA;
+	mcp->txbuf[1] = 0;
+	ret = mcp_send_data_req_status(mcp, mcp->txbuf, 2);
+
+	if (ret == -EAGAIN)
+		goto reschedule_task;
+
+	indio_dev = devm_iio_device_alloc(&mcp->hdev->dev, sizeof(*data));
+	if (!indio_dev)
+		goto unlock;
+
+	data = iio_priv(indio_dev);
+	data->mcp = mcp;
+
+	indio_dev->name = "mcp2221";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mcp2221_info;
+	indio_dev->channels = mcp->iio_channels;
+	indio_dev->num_channels = num_channels;
+
+	devm_iio_device_register(&mcp->hdev->dev, indio_dev);
+
+unlock:
+	mutex_unlock(&mcp->lock);
+	hid_hw_power(mcp->hdev, PM_HINT_NORMAL);
+
+	return;
+
+reschedule_task:
+	mutex_unlock(&mcp->lock);
+	hid_hw_power(mcp->hdev, PM_HINT_NORMAL);
+
+	if (!retries--)
+		return;
+
+	/* Device is not ready to read SRAM or FLASH data, try again */
+	schedule_delayed_work(&mcp->init_work, msecs_to_jiffies(100));
+}
+#endif
+
 static int mcp2221_probe(struct hid_device *hdev,
 					const struct hid_device_id *id)
 {
@@ -849,7 +1119,8 @@ static int mcp2221_probe(struct hid_device *hdev,
 	ret = hid_hw_open(hdev);
 	if (ret) {
 		hid_err(hdev, "can't open device\n");
-		goto err_hstop;
+		hid_hw_stop(hdev);
+		return ret;
 	}
 
 	mutex_init(&mcp->lock);
@@ -857,6 +1128,10 @@ static int mcp2221_probe(struct hid_device *hdev,
 	hid_set_drvdata(hdev, mcp);
 	mcp->hdev = hdev;
 
+	ret = devm_add_action_or_reset(&hdev->dev, mcp2221_hid_unregister, hdev);
+	if (ret)
+		return ret;
+
 	/* Set I2C bus clock diviser */
 	if (i2c_clk_freq > 400)
 		i2c_clk_freq = 400;
@@ -873,19 +1148,18 @@ static int mcp2221_probe(struct hid_device *hdev,
 			"MCP2221 usb-i2c bridge on hidraw%d",
 			((struct hidraw *)hdev->hidraw)->minor);
 
-	ret = i2c_add_adapter(&mcp->adapter);
+	ret = devm_i2c_add_adapter(&hdev->dev, &mcp->adapter);
 	if (ret) {
 		hid_err(hdev, "can't add usb-i2c adapter: %d\n", ret);
-		goto err_i2c;
+		return ret;
 	}
 	i2c_set_adapdata(&mcp->adapter, mcp);
 
+#if IS_REACHABLE(CONFIG_GPIOLIB)
 	/* Setup GPIO chip */
 	mcp->gc = devm_kzalloc(&hdev->dev, sizeof(*mcp->gc), GFP_KERNEL);
-	if (!mcp->gc) {
-		ret = -ENOMEM;
-		goto err_gc;
-	}
+	if (!mcp->gc)
+		return -ENOMEM;
 
 	mcp->gc->label = "mcp2221_gpio";
 	mcp->gc->direction_input = mcp_gpio_direction_input;
@@ -900,26 +1174,15 @@ static int mcp2221_probe(struct hid_device *hdev,
 
 	ret = devm_gpiochip_add_data(&hdev->dev, mcp->gc, mcp);
 	if (ret)
-		goto err_gc;
-
-	return 0;
-
-err_gc:
-	i2c_del_adapter(&mcp->adapter);
-err_i2c:
-	hid_hw_close(mcp->hdev);
-err_hstop:
-	hid_hw_stop(mcp->hdev);
 		return ret;
-}
+#endif
 
-static void mcp2221_remove(struct hid_device *hdev)
-{
-	struct mcp2221 *mcp = hid_get_drvdata(hdev);
+#if IS_REACHABLE(CONFIG_IIO)
+	INIT_DELAYED_WORK(&mcp->init_work, mcp_init_work);
+	schedule_delayed_work(&mcp->init_work, msecs_to_jiffies(100));
+#endif
 
-	i2c_del_adapter(&mcp->adapter);
-	hid_hw_close(mcp->hdev);
-	hid_hw_stop(mcp->hdev);
+	return 0;
 }
 
 static const struct hid_device_id mcp2221_devices[] = {

drivers/hid/hid-rmi.c

@@ -326,6 +326,8 @@ static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
 	if (!(test_bit(RMI_STARTED, &hdata->flags)))
 		return 0;
 
+	pm_wakeup_event(hdev->dev.parent, 0);
+
 	local_irq_save(flags);
 
 	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);

drivers/hid/hid-sensor-custom.c

@@ -62,7 +62,7 @@ struct hid_sensor_sample {
 	u32 raw_len;
 } __packed;
 
-static struct attribute hid_custom_attrs[] = {
+static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = {
 	{.name = "name", .mode = S_IRUGO},
 	{.name = "units", .mode = S_IRUGO},
 	{.name = "unit-expo", .mode = S_IRUGO},
@@ -862,7 +862,7 @@ hid_sensor_register_platform_device(struct platform_device *pdev,
 		return ERR_PTR(-ENOMEM);
 
 	custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name,
-						    PLATFORM_DEVID_NONE, hsdev,
+						    PLATFORM_DEVID_AUTO, hsdev,
 						    sizeof(*hsdev));
 	kfree(dev_name);
 	return custom_pdev;

drivers/hid/hid-uclogic-params-test.c

@@ -136,7 +136,7 @@ static void uclogic_parse_ugee_v2_desc_case_desc(struct uclogic_parse_ugee_v2_de
 KUNIT_ARRAY_PARAM(uclogic_parse_ugee_v2_desc, uclogic_parse_ugee_v2_desc_cases,
 		  uclogic_parse_ugee_v2_desc_case_desc);
 
-static void uclogic_parse_ugee_v2_desc_test(struct kunit *test)
+static void hid_test_uclogic_parse_ugee_v2_desc(struct kunit *test)
 {
 	int res;
 	s32 desc_params[UCLOGIC_RDESC_PH_ID_NUM];
@@ -175,7 +175,7 @@ static void uclogic_parse_ugee_v2_desc_test(struct kunit *test)
 }
 
 static struct kunit_case hid_uclogic_params_test_cases[] = {
-	KUNIT_CASE_PARAM(uclogic_parse_ugee_v2_desc_test,
+	KUNIT_CASE_PARAM(hid_test_uclogic_parse_ugee_v2_desc,
 			 uclogic_parse_ugee_v2_desc_gen_params),
 	{}
 };

drivers/hid/hid-uclogic-params.c

@@ -18,6 +18,7 @@
 #include "usbhid/usbhid.h"
 #include "hid-ids.h"
 #include <linux/ctype.h>
+#include <linux/string.h>
 #include <asm/unaligned.h>
 
 /**
@@ -1211,6 +1212,69 @@ static int uclogic_params_ugee_v2_init_frame_mouse(struct uclogic_params *p)
 	return rc;
 }
 
+/**
+ * uclogic_params_ugee_v2_has_battery() - check whether a UGEE v2 device has
+ * battery or not.
+ * @hdev:	The HID device of the tablet interface.
+ *
+ * Returns:
+ *	True if the device has battery, false otherwise.
+ */
+static bool uclogic_params_ugee_v2_has_battery(struct hid_device *hdev)
+{
+	/* The XP-PEN Deco LW vendor, product and version are identical to the
+	 * Deco L. The only difference reported by their firmware is the product
+	 * name. Add a quirk to support battery reporting on the wireless
+	 * version.
+	 */
+	if (hdev->vendor == USB_VENDOR_ID_UGEE &&
+	    hdev->product == USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L) {
+		struct usb_device *udev = hid_to_usb_dev(hdev);
+
+		if (strstarts(udev->product, "Deco LW"))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * uclogic_params_ugee_v2_init_battery() - initialize UGEE v2 battery reporting.
+ * @hdev:	The HID device of the tablet interface, cannot be NULL.
+ * @p:		Parameters to fill in, cannot be NULL.
+ *
+ * Returns:
+ *	Zero, if successful. A negative errno code on error.
+ */
+static int uclogic_params_ugee_v2_init_battery(struct hid_device *hdev,
+					       struct uclogic_params *p)
+{
+	int rc = 0;
+
+	if (!hdev || !p)
+		return -EINVAL;
+
+	/* Some tablets contain invalid characters in hdev->uniq, throwing a
+	 * "hwmon: '<name>' is not a valid name attribute, please fix" error.
+	 * Use the device vendor and product IDs instead.
+	 */
+	snprintf(hdev->uniq, sizeof(hdev->uniq), "%x-%x", hdev->vendor,
+		 hdev->product);
+
+	rc = uclogic_params_frame_init_with_desc(&p->frame_list[1],
+						 uclogic_rdesc_ugee_v2_battery_template_arr,
+						 uclogic_rdesc_ugee_v2_battery_template_size,
+						 UCLOGIC_RDESC_UGEE_V2_BATTERY_ID);
+	if (rc)
+		return rc;
+
+	p->frame_list[1].suffix = "Battery";
+	p->pen.subreport_list[1].value = 0xf2;
+	p->pen.subreport_list[1].id = UCLOGIC_RDESC_UGEE_V2_BATTERY_ID;
+
+	return rc;
+}
+
 /**
  * uclogic_params_ugee_v2_init() - initialize a UGEE graphics tablets by
  * discovering their parameters.
@@ -1334,6 +1398,15 @@ static int uclogic_params_ugee_v2_init(struct uclogic_params *params,
 	if (rc)
 		goto cleanup;
 
+	/* Initialize the battery interface*/
+	if (uclogic_params_ugee_v2_has_battery(hdev)) {
+		rc = uclogic_params_ugee_v2_init_battery(hdev, &p);
+		if (rc) {
+			hid_err(hdev, "error initializing battery: %d\n", rc);
+			goto cleanup;
+		}
+	}
+
 output:
 	/* Output parameters */
 	memcpy(params, &p, sizeof(*params));

drivers/hid/hid-uclogic-rdesc-test.c

@@ -187,7 +187,7 @@ static void uclogic_template_case_desc(struct uclogic_template_case *t,
 KUNIT_ARRAY_PARAM(uclogic_template, uclogic_template_cases,
 		  uclogic_template_case_desc);
 
-static void uclogic_template_test(struct kunit *test)
+static void hid_test_uclogic_template(struct kunit *test)
 {
 	__u8 *res;
 	const struct uclogic_template_case *params = test->param_value;
@@ -203,7 +203,7 @@ static void uclogic_template_test(struct kunit *test)
 }
 
 static struct kunit_case hid_uclogic_rdesc_test_cases[] = {
-	KUNIT_CASE_PARAM(uclogic_template_test, uclogic_template_gen_params),
+	KUNIT_CASE_PARAM(hid_test_uclogic_template, uclogic_template_gen_params),
 	{}
 };
 

drivers/hid/hid-uclogic-rdesc.c

@@ -1035,6 +1035,40 @@ const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[] = {
 const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size =
 			sizeof(uclogic_rdesc_ugee_v2_frame_mouse_template_arr);
 
+/* Fixed report descriptor template for UGEE v2 battery reports */
+const __u8 uclogic_rdesc_ugee_v2_battery_template_arr[] = {
+	0x05, 0x01,         /*  Usage Page (Desktop),                   */
+	0x09, 0x07,         /*  Usage (Keypad),                         */
+	0xA1, 0x01,         /*  Collection (Application),               */
+	0x85, UCLOGIC_RDESC_UGEE_V2_BATTERY_ID,
+			    /*      Report ID,                          */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x02,         /*      Report Count (2),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0x05, 0x84,         /*      Usage Page (Power Device),          */
+	0x05, 0x85,         /*      Usage Page (Battery System),        */
+	0x09, 0x65,         /*      Usage Page (AbsoluteStateOfCharge), */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x01,         /*      Report Count (1),                   */
+	0x15, 0x00,         /*      Logical Minimum (0),                */
+	0x26, 0xff, 0x00,   /*      Logical Maximum (255),              */
+	0x81, 0x02,         /*      Input (Variable),                   */
+	0x75, 0x01,         /*      Report Size (1),                    */
+	0x95, 0x01,         /*      Report Count (1),                   */
+	0x15, 0x00,         /*      Logical Minimum (0),                */
+	0x25, 0x01,         /*      Logical Maximum (1),                */
+	0x09, 0x44,         /*      Usage Page (Charging),              */
+	0x81, 0x02,         /*      Input (Variable),                   */
+	0x95, 0x07,         /*      Report Count (7),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0x75, 0x08,         /*      Report Size (8),                    */
+	0x95, 0x07,         /*      Report Count (7),                   */
+	0x81, 0x01,         /*      Input (Constant),                   */
+	0xC0                /*  End Collection                          */
+};
+const size_t uclogic_rdesc_ugee_v2_battery_template_size =
+			sizeof(uclogic_rdesc_ugee_v2_battery_template_arr);
+
 /* Fixed report descriptor for Ugee EX07 frame */
 const __u8 uclogic_rdesc_ugee_ex07_frame_arr[] = {
 	0x05, 0x01,             /*  Usage Page (Desktop),                   */

drivers/hid/hid-uclogic-rdesc.h

@@ -161,6 +161,9 @@ extern const size_t uclogic_rdesc_v2_frame_dial_size;
 /* Device ID byte offset in v2 frame dial reports */
 #define UCLOGIC_RDESC_V2_FRAME_DIAL_DEV_ID_BYTE	0x4
 
+/* Report ID for tweaked UGEE v2 battery reports */
+#define UCLOGIC_RDESC_UGEE_V2_BATTERY_ID 0xba
+
 /* Fixed report descriptor template for UGEE v2 pen reports */
 extern const __u8 uclogic_rdesc_ugee_v2_pen_template_arr[];
 extern const size_t uclogic_rdesc_ugee_v2_pen_template_size;
@@ -177,6 +180,10 @@ extern const size_t uclogic_rdesc_ugee_v2_frame_dial_template_size;
 extern const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[];
 extern const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size;
 
+/* Fixed report descriptor template for UGEE v2 battery reports */
+extern const __u8 uclogic_rdesc_ugee_v2_battery_template_arr[];
+extern const size_t uclogic_rdesc_ugee_v2_battery_template_size;
+
 /* Fixed report descriptor for Ugee EX07 frame */
 extern const __u8 uclogic_rdesc_ugee_ex07_frame_arr[];
 extern const size_t uclogic_rdesc_ugee_ex07_frame_size;

drivers/hid/hid-wiimote-core.c

@@ -458,6 +458,9 @@ static __u8 wiimote_cmd_read_ext(struct wiimote_data *wdata, __u8 *rmem)
 	if (rmem[0] == 0x00 && rmem[1] == 0x00 &&
 	    rmem[4] == 0x01 && rmem[5] == 0x03)
 		return WIIMOTE_EXT_GUITAR;
+	if (rmem[0] == 0x03 && rmem[1] == 0x00 &&
+	    rmem[4] == 0x01 && rmem[5] == 0x03)
+		return WIIMOTE_EXT_TURNTABLE;
 
 	return WIIMOTE_EXT_UNKNOWN;
 }
@@ -495,6 +498,7 @@ static bool wiimote_cmd_map_mp(struct wiimote_data *wdata, __u8 exttype)
 	case WIIMOTE_EXT_GUITAR:
 		wmem = 0x07;
 		break;
+	case WIIMOTE_EXT_TURNTABLE:
 	case WIIMOTE_EXT_NUNCHUK:
 		wmem = 0x05;
 		break;
@@ -1082,6 +1086,7 @@ static const char *wiimote_exttype_names[WIIMOTE_EXT_NUM] = {
 	[WIIMOTE_EXT_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
 	[WIIMOTE_EXT_DRUMS] = "Nintendo Wii Drums",
 	[WIIMOTE_EXT_GUITAR] = "Nintendo Wii Guitar",
+	[WIIMOTE_EXT_TURNTABLE] = "Nintendo Wii Turntable"
 };
 
 /*
@@ -1669,6 +1674,8 @@ static ssize_t wiimote_ext_show(struct device *dev,
 		return sprintf(buf, "drums\n");
 	case WIIMOTE_EXT_GUITAR:
 		return sprintf(buf, "guitar\n");
+	case WIIMOTE_EXT_TURNTABLE:
+		return sprintf(buf, "turntable\n");
 	case WIIMOTE_EXT_UNKNOWN:
 	default:
 		return sprintf(buf, "unknown\n");

drivers/hid/hid-wiimote-modules.c

@@ -2403,6 +2403,230 @@ static const struct wiimod_ops wiimod_guitar = {
 	.in_ext = wiimod_guitar_in_ext,
 };
 
+/* 
+ * Turntable
+ * DJ Hero came with a Turntable Controller that was plugged in
+ * as an extension.
+ * We create a separate device for turntables and report all information via this
+ * input device.
+*/
+
+enum wiimod_turntable_keys {
+	WIIMOD_TURNTABLE_KEY_G_RIGHT,
+	WIIMOD_TURNTABLE_KEY_R_RIGHT,
+	WIIMOD_TURNTABLE_KEY_B_RIGHT,
+	WIIMOD_TURNTABLE_KEY_G_LEFT,
+	WIIMOD_TURNTABLE_KEY_R_LEFT,
+	WIIMOD_TURNTABLE_KEY_B_LEFT,
+	WIIMOD_TURNTABLE_KEY_EUPHORIA,
+	WIIMOD_TURNTABLE_KEY_PLUS,
+	WIIMOD_TURNTABLE_KEY_MINUS,
+	WIIMOD_TURNTABLE_KEY_NUM
+};
+
+static const __u16 wiimod_turntable_map[] = {
+	BTN_1,			/* WIIMOD_TURNTABLE_KEY_G_RIGHT */
+	BTN_2,			/* WIIMOD_TURNTABLE_KEY_R_RIGHT */
+	BTN_3,			/* WIIMOD_TURNTABLE_KEY_B_RIGHT */
+	BTN_4,			/* WIIMOD_TURNTABLE_KEY_G_LEFT */
+	BTN_5,			/* WIIMOD_TURNTABLE_KEY_R_LEFT */
+	BTN_6,			/* WIIMOD_TURNTABLE_KEY_B_LEFT */
+	BTN_7,			/* WIIMOD_TURNTABLE_KEY_EUPHORIA */
+	BTN_START,		/* WIIMOD_TURNTABLE_KEY_PLUS */
+	BTN_SELECT,		/* WIIMOD_TURNTABLE_KEY_MINUS */
+};
+
+static void wiimod_turntable_in_ext(struct wiimote_data *wdata, const __u8 *ext)
+{
+	__u8 be, cs, sx, sy, ed, rtt, rbg, rbr, rbb, ltt, lbg, lbr, lbb, bp, bm;
+	/* 
+	 * Byte |  7   |  6  |  5  |  4  |  3  |  2   |  1   |  0     |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   0  | RTT<4:3>   | 		      	  SX <5:0> 			      |
+	 *   1  | RTT<2:1>   |				  SY <5:0>			      |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   2  |RTT<0>|  ED<4:3>  |          CS<3:0>        | RTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   3  |     ED<2:0> 	   | 			 LTT<4:0>			  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   4  |  0   |  0  | LBR |  B- |  0  |  B+  |  RBR | LTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   5  | LBB  |  0  | RBG |  BE | LBG | RBB  | 0    | 0      |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 * All pressed buttons are 0
+	 *
+	 * With Motion+ enabled, it will look like this:
+	 * Byte |  8   |  7  |  6  |  5  |  4  |  3   |  2   |  1     |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   1  | RTT<4:3>   | 		      	  SX <5:1> 		 |	  0   |
+	 *   2  | RTT<2:1>   |				  SY <5:1>		 |	  0   |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   3  |RTT<0>|  ED<4:3>  |          CS<3:0>        | RTT<5> |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   4  |     ED<2:0> 	   | 			 LTT<4:0>			  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   5  |  0   |  0  | LBR |  B- |  0  |  B+  | RBR  |  XXXX  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 *   6  | LBB  |  0  | RBG |  BE | LBG | RBB  | XXXX |  XXXX  |
+	 *------+------+-----+-----+-----+-----+------+------+--------+
+	 */
+	
+	be = !(ext[5] & 0x10); 
+	cs = ((ext[2] & 0x1e));
+	sx = ext[0] & 0x3f;
+	sy = ext[1] & 0x3f;
+	ed = (ext[3] & 0xe0) >> 5;
+	rtt = ((ext[2] & 0x01) << 5 | (ext[0] & 0xc0) >> 3 | (ext[1] & 0xc0) >> 5 | ( ext[2] & 0x80 ) >> 7);
+	ltt = ((ext[4] & 0x01) << 5 | (ext[3] & 0x1f));
+	rbg = !(ext[5] & 0x20);
+	rbr = !(ext[4] & 0x02);
+	rbb = !(ext[5] & 0x04);
+	lbg = !(ext[5] & 0x08);
+	lbb = !(ext[5] & 0x80);
+	lbr = !(ext[4] & 0x20);
+	bm =  !(ext[4] & 0x10);
+	bp =  !(ext[4] & 0x04);
+
+	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
+		ltt = (ext[4] & 0x01) << 5;
+		sx &= 0x3e;
+		sy &= 0x3e;
+	}
+
+	input_report_abs(wdata->extension.input, ABS_X, sx);
+	input_report_abs(wdata->extension.input, ABS_Y, sy);
+	input_report_abs(wdata->extension.input, ABS_HAT0X, rtt);
+	input_report_abs(wdata->extension.input, ABS_HAT1X, ltt);
+	input_report_abs(wdata->extension.input, ABS_HAT2X, cs);
+	input_report_abs(wdata->extension.input, ABS_HAT3X, ed);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_G_RIGHT], 
+					rbg);
+	input_report_key(wdata->extension.input,
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_R_RIGHT],
+					rbr);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_B_RIGHT], 
+					rbb);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_G_LEFT], 
+					lbg);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_R_LEFT], 
+					lbr);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_B_LEFT], 
+					lbb);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_EUPHORIA], 
+					be);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_PLUS], 
+					bp);
+	input_report_key(wdata->extension.input, 
+					wiimod_turntable_map[WIIMOD_TURNTABLE_KEY_MINUS], 
+					bm);
+
+	input_sync(wdata->extension.input);
+}
+
+static int wiimod_turntable_open(struct input_dev *dev)
+{
+	struct wiimote_data *wdata = input_get_drvdata(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&wdata->state.lock, flags);
+	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
+	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
+	spin_unlock_irqrestore(&wdata->state.lock, flags);
+
+	return 0;
+}
+
+static void wiimod_turntable_close(struct input_dev *dev)
+{
+	struct wiimote_data *wdata = input_get_drvdata(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&wdata->state.lock, flags);
+	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
+	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
+	spin_unlock_irqrestore(&wdata->state.lock, flags);
+}
+
+static int wiimod_turntable_probe(const struct wiimod_ops *ops,
+			       struct wiimote_data *wdata)
+{
+ 	int ret, i;
+
+	wdata->extension.input = input_allocate_device();
+	if (!wdata->extension.input)
+		return -ENOMEM;
+
+	input_set_drvdata(wdata->extension.input, wdata);
+	wdata->extension.input->open = wiimod_turntable_open;
+	wdata->extension.input->close = wiimod_turntable_close;
+	wdata->extension.input->dev.parent = &wdata->hdev->dev;
+	wdata->extension.input->id.bustype = wdata->hdev->bus;
+	wdata->extension.input->id.vendor = wdata->hdev->vendor;
+	wdata->extension.input->id.product = wdata->hdev->product;
+	wdata->extension.input->id.version = wdata->hdev->version;
+	wdata->extension.input->name = WIIMOTE_NAME " Turntable";
+
+	set_bit(EV_KEY, wdata->extension.input->evbit);
+	for (i = 0; i < WIIMOD_TURNTABLE_KEY_NUM; ++i)
+		set_bit(wiimod_turntable_map[i],
+			wdata->extension.input->keybit);
+
+	set_bit(EV_ABS, wdata->extension.input->evbit);
+	set_bit(ABS_X, wdata->extension.input->absbit);
+	set_bit(ABS_Y, wdata->extension.input->absbit);
+	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT2X, wdata->extension.input->absbit);
+	set_bit(ABS_HAT3X, wdata->extension.input->absbit);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_X, 0, 63, 1, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_Y, 63, 0, 1, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT0X, -8, 8, 0, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT1X, -8, 8, 0, 0);
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT2X, 0, 31, 1, 1);	
+	input_set_abs_params(wdata->extension.input,
+			     ABS_HAT3X, 0, 7, 0, 0);	 
+	ret = input_register_device(wdata->extension.input);
+	if (ret)
+		goto err_free;
+
+	return 0;
+
+err_free:
+	input_free_device(wdata->extension.input);
+	wdata->extension.input = NULL;
+	return ret;
+}
+
+static void wiimod_turntable_remove(const struct wiimod_ops *ops,
+				 struct wiimote_data *wdata)
+{
+	if (!wdata->extension.input)
+		return;
+
+	input_unregister_device(wdata->extension.input);
+	wdata->extension.input = NULL;
+}
+
+static const struct wiimod_ops wiimod_turntable = {
+	.flags = 0,
+	.arg = 0,
+	.probe = wiimod_turntable_probe,
+	.remove = wiimod_turntable_remove,
+	.in_ext = wiimod_turntable_in_ext,
+};
+
 /*
  * Builtin Motion Plus
  * This module simply sets the WIIPROTO_FLAG_BUILTIN_MP protocol flag which
@@ -2657,4 +2881,5 @@ const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM] = {
 	[WIIMOTE_EXT_PRO_CONTROLLER] = &wiimod_pro,
 	[WIIMOTE_EXT_DRUMS] = &wiimod_drums,
 	[WIIMOTE_EXT_GUITAR] = &wiimod_guitar,
+	[WIIMOTE_EXT_TURNTABLE] = &wiimod_turntable,
 };

drivers/hid/hid-wiimote.h

@@ -88,6 +88,7 @@ enum wiimote_exttype {
 	WIIMOTE_EXT_PRO_CONTROLLER,
 	WIIMOTE_EXT_DRUMS,
 	WIIMOTE_EXT_GUITAR,
+	WIIMOTE_EXT_TURNTABLE,
 	WIIMOTE_EXT_NUM,
 };
 

drivers/hid/i2c-hid/i2c-hid-core.c

@@ -554,6 +554,7 @@ static void i2c_hid_get_input(struct i2c_hid *ihid)
 	i2c_hid_dbg(ihid, "input: %*ph\n", ret_size, ihid->inbuf);
 
 	if (test_bit(I2C_HID_STARTED, &ihid->flags)) {
+		if (ihid->hid->group != HID_GROUP_RMI)
 			pm_wakeup_event(&ihid->client->dev, 0);
 
 		hid_input_report(ihid->hid, HID_INPUT_REPORT,

drivers/hid/i2c-hid/i2c-hid-of-elan.c

@@ -68,8 +68,7 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *ops)
 	regulator_disable(ihid_elan->vcc33);
 }
 
-static int i2c_hid_of_elan_probe(struct i2c_client *client,
-				 const struct i2c_device_id *id)
+static int i2c_hid_of_elan_probe(struct i2c_client *client)
 {
 	struct i2c_hid_of_elan *ihid_elan;
 
@@ -119,7 +118,7 @@ static struct i2c_driver elan_i2c_hid_ts_driver = {
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = of_match_ptr(elan_i2c_hid_of_match),
 	},
-	.probe		= i2c_hid_of_elan_probe,
+	.probe_new	= i2c_hid_of_elan_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 };

drivers/hid/i2c-hid/i2c-hid-of-goodix.c

@@ -87,8 +87,7 @@ static int ihid_goodix_vdd_notify(struct notifier_block *nb,
 	return ret;
 }
 
-static int i2c_hid_of_goodix_probe(struct i2c_client *client,
-				   const struct i2c_device_id *id)
+static int i2c_hid_of_goodix_probe(struct i2c_client *client)
 {
 	struct i2c_hid_of_goodix *ihid_goodix;
 	int ret;
@@ -167,7 +166,7 @@ static struct i2c_driver goodix_i2c_hid_ts_driver = {
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = of_match_ptr(goodix_i2c_hid_of_match),
 	},
-	.probe		= i2c_hid_of_goodix_probe,
+	.probe_new	= i2c_hid_of_goodix_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 };

drivers/hid/i2c-hid/i2c-hid-of.c

@@ -66,8 +66,7 @@ static void i2c_hid_of_power_down(struct i2chid_ops *ops)
 			       ihid_of->supplies);
 }
 
-static int i2c_hid_of_probe(struct i2c_client *client,
-			    const struct i2c_device_id *dev_id)
+static int i2c_hid_of_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct i2c_hid_of *ihid_of;
@@ -138,7 +137,7 @@ static struct i2c_driver i2c_hid_of_driver = {
 		.of_match_table = of_match_ptr(i2c_hid_of_match),
 	},
 
-	.probe		= i2c_hid_of_probe,
+	.probe_new	= i2c_hid_of_probe,
 	.remove		= i2c_hid_core_remove,
 	.shutdown	= i2c_hid_core_shutdown,
 	.id_table	= i2c_hid_of_id_table,

drivers/hid/intel-ish-hid/ishtp/client.c

@@ -841,7 +841,6 @@ void recv_ishtp_cl_msg(struct ishtp_device *dev,
 	unsigned char *buffer = NULL;
 	struct ishtp_cl_rb *complete_rb = NULL;
 	unsigned long	flags;
-	int	rb_count;
 
 	if (ishtp_hdr->reserved) {
 		dev_err(dev->devc, "corrupted message header.\n");
@@ -855,9 +854,7 @@ void recv_ishtp_cl_msg(struct ishtp_device *dev,
 	}
 
 	spin_lock_irqsave(&dev->read_list_spinlock, flags);
-	rb_count = -1;
 	list_for_each_entry(rb, &dev->read_list.list, list) {
-		++rb_count;
 		cl = rb->cl;
 		if (!cl || !(cl->host_client_id == ishtp_hdr->host_addr &&
 				cl->fw_client_id == ishtp_hdr->fw_addr) ||