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

Pull HID subsystem updates from Jiri Kosina:
 "HID subsystem and drivers update. Highlights:

   - new support of a group of Win7/Win8 multitouch devices, from
     Benjamin Tissoires

   - fix for compat interface brokenness in uhid, from Dmitry Torokhov

   - conversion of drivers to use hid_driver helper, by H Hartley
     Sweeten

   - HID over I2C transport received ACPI enumeration support, written
     by Mika Westerberg

   - there is an ongoing effort to make HID sensor hubs independent of
     USB transport.  The first self-contained part of this work is
     provided here, done by Mika Westerberg

   - a few smaller fixes here and there, support for a couple new
     devices added"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (43 commits)
  HID: Correct Logitech order in hid-ids.h
  HID: LG4FF: Remove unnecessary deadzone code
  HID: LG: Prevent the Logitech Gaming Wheels deadzone
  HID: LG: Fix detection of Logitech Speed Force Wireless (WiiWheel)
  HID: LG: Add support for Logitech Momo Force (Red) Wheel
  HID: hidraw: print message when succesfully initialized
  HID: logitech: split accel, brake for Driving Force wheel
  HID: logitech: add report descriptor for Driving Force wheel
  HID: add ThingM blink(1) USB RGB LED support
  HID: uhid: make creating devices work on 64/32 systems
  HID: wiimote: fix nunchuck button parser
  HID: blacklist Velleman data acquisition boards
  HID: sensor-hub: don't limit the driver only to USB bus
  HID: sensor-hub: get rid of unused sensor_hub_grabbed_usages[] table
  HID: extend autodetect to handle I2C sensors as well
  HID: ntrig: use input_configured() callback to set the name
  HID: multitouch: do not use pointers towards hid-core
  HID: add missing GENERIC_HARDIRQ dependency
  HID: multitouch: make MT_CLS_ALWAYS_TRUE the new default class
  HID: multitouch: fix protocol for Elo panels
  ...

1 files changed, 81 insertions, 6 deletions

diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index e766b56..ec79302 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/hid.h>
 #include <linux/mutex.h>
+#include <linux/acpi.h>
 
 #include <linux/i2c/i2c-hid.h>
 
@@ -139,6 +140,8 @@ struct i2c_hid {
 	unsigned long		flags;		/* device flags */
 
 	wait_queue_head_t	wait;		/* For waiting the interrupt */
+
+	struct i2c_hid_platform_data pdata;
 };
 
 static int __i2c_hid_command(struct i2c_client *client,
@@ -821,6 +824,70 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static int i2c_hid_acpi_pdata(struct i2c_client *client,
+		struct i2c_hid_platform_data *pdata)
+{
+	static u8 i2c_hid_guid[] = {
+		0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
+		0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
+	};
+	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object params[4], *obj;
+	struct acpi_object_list input;
+	struct acpi_device *adev;
+	acpi_handle handle;
+
+	handle = ACPI_HANDLE(&client->dev);
+	if (!handle || acpi_bus_get_device(handle, &adev))
+		return -ENODEV;
+
+	input.count = ARRAY_SIZE(params);
+	input.pointer = params;
+
+	params[0].type = ACPI_TYPE_BUFFER;
+	params[0].buffer.length = sizeof(i2c_hid_guid);
+	params[0].buffer.pointer = i2c_hid_guid;
+	params[1].type = ACPI_TYPE_INTEGER;
+	params[1].integer.value = 1;
+	params[2].type = ACPI_TYPE_INTEGER;
+	params[2].integer.value = 1; /* HID function */
+	params[3].type = ACPI_TYPE_INTEGER;
+	params[3].integer.value = 0;
+
+	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DSM", &input, &buf))) {
+		dev_err(&client->dev, "device _DSM execution failed\n");
+		return -ENODEV;
+	}
+
+	obj = (union acpi_object *)buf.pointer;
+	if (obj->type != ACPI_TYPE_INTEGER) {
+		dev_err(&client->dev, "device _DSM returned invalid type: %d\n",
+			obj->type);
+		kfree(buf.pointer);
+		return -EINVAL;
+	}
+
+	pdata->hid_descriptor_address = obj->integer.value;
+
+	kfree(buf.pointer);
+	return 0;
+}
+
+static const struct acpi_device_id i2c_hid_acpi_match[] = {
+	{"ACPI0C50", 0 },
+	{"PNP0C50", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
+#else
+static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
+		struct i2c_hid_platform_data *pdata)
+{
+	return -ENODEV;
+}
+#endif
+
 static int i2c_hid_probe(struct i2c_client *client,
 			 const struct i2c_device_id *dev_id)
 {
@@ -832,11 +899,6 @@ static int i2c_hid_probe(struct i2c_client *client,
 
 	dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
 
-	if (!platform_data) {
-		dev_err(&client->dev, "HID register address not provided\n");
-		return -EINVAL;
-	}
-
 	if (!client->irq) {
 		dev_err(&client->dev,
 			"HID over i2c has not been provided an Int IRQ\n");
@@ -847,11 +909,22 @@ static int i2c_hid_probe(struct i2c_client *client,
 	if (!ihid)
 		return -ENOMEM;
 
+	if (!platform_data) {
+		ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
+		if (ret) {
+			dev_err(&client->dev,
+				"HID register address not provided\n");
+			goto err;
+		}
+	} else {
+		ihid->pdata = *platform_data;
+	}
+
 	i2c_set_clientdata(client, ihid);
 
 	ihid->client = client;
 
-	hidRegister = platform_data->hid_descriptor_address;
+	hidRegister = ihid->pdata.hid_descriptor_address;
 	ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
 
 	init_waitqueue_head(&ihid->wait);
@@ -884,6 +957,7 @@ static int i2c_hid_probe(struct i2c_client *client,
 	hid->hid_get_raw_report = i2c_hid_get_raw_report;
 	hid->hid_output_raw_report = i2c_hid_output_raw_report;
 	hid->dev.parent = &client->dev;
+	ACPI_HANDLE_SET(&hid->dev, ACPI_HANDLE(&client->dev));
 	hid->bus = BUS_I2C;
 	hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
 	hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
@@ -975,6 +1049,7 @@ static struct i2c_driver i2c_hid_driver = {
 		.name	= "i2c_hid",
 		.owner	= THIS_MODULE,
 		.pm	= &i2c_hid_pm,
+		.acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
 	},
 
 	.probe		= i2c_hid_probe,