Merge tag 'staging-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging tree update from Greg Kroah-Hartman:
 "Here's the big staging tree merge for 3.9-rc1

  Lots of cleanups and updates for drivers all through the staging tree.
  We are pretty much "code neutral" here, adding just about as many
  lines as we removed.

  All of these have been in linux-next for a while."

* tag 'staging-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (804 commits)
  staging: comedi: vmk80xx: wait for URBs to complete
  staging: comedi: drivers: addi-data: hwdrv_apci3200.c: Add a missing semicolon
  staging: et131x: Update TODO list
  staging: et131x: Remove assignment of skb->dev
  staging: wlan-ng: hfa384x.h: fix for error reported by smatch
  staging/zache checkpatch ERROR: spaces prohibited around that
  staging/ozwpan: Mark read only parameters and structs as const
  staging/ozwpan: Remove empty and unused function oz_cdev_heartbeat
  staging/ozwpan: Mark local functions as static (fix sparse warnings)
  staging/ozwpan: Add missing header includes
  staging/usbip: Mark local functions as static (fix sparse warnings)
  staging/xgifb: Remove duplicated code in loops.
  staging/xgifb: Consolidate return paths
  staging/xgifb: Remove code without effect
  staging/xgifb: Remove unnecessary casts
  staging/xgifb: Consolidate if/else if with identical code branches
  staging: vt6656: replaced custom TRUE definition with true
  staging: vt6656: replaced custom FALSE definition with false
  staging: vt6656: replace custom BOOL definition with bool
  staging/rtl8187se: Mark functions as static to silence sparse
  ...

1 files changed, 155 insertions, 0 deletions

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
new file mode 100644
index 00000000000..e1d0869e0ad
--- /dev/null
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
@@ -0,0 +1,155 @@
+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* This software is licensed under the terms of the GNU General Public
+* License version 2, as published by the Free Software Foundation, and
+* may be copied, distributed, and modified under those terms.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*/
+
+#include "inv_mpu_iio.h"
+
+static void inv_scan_query(struct iio_dev *indio_dev)
+{
+	struct inv_mpu6050_state  *st = iio_priv(indio_dev);
+
+	st->chip_config.gyro_fifo_enable =
+		test_bit(INV_MPU6050_SCAN_GYRO_X,
+			indio_dev->active_scan_mask) ||
+			test_bit(INV_MPU6050_SCAN_GYRO_Y,
+			indio_dev->active_scan_mask) ||
+			test_bit(INV_MPU6050_SCAN_GYRO_Z,
+			indio_dev->active_scan_mask);
+
+	st->chip_config.accl_fifo_enable =
+		test_bit(INV_MPU6050_SCAN_ACCL_X,
+			indio_dev->active_scan_mask) ||
+			test_bit(INV_MPU6050_SCAN_ACCL_Y,
+			indio_dev->active_scan_mask) ||
+			test_bit(INV_MPU6050_SCAN_ACCL_Z,
+			indio_dev->active_scan_mask);
+}
+
+/**
+ *  inv_mpu6050_set_enable() - enable chip functions.
+ *  @indio_dev:	Device driver instance.
+ *  @enable: enable/disable
+ */
+static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
+{
+	struct inv_mpu6050_state *st = iio_priv(indio_dev);
+	int result;
+
+	if (enable) {
+		result = inv_mpu6050_set_power_itg(st, true);
+		if (result)
+			return result;
+		inv_scan_query(indio_dev);
+		if (st->chip_config.gyro_fifo_enable) {
+			result = inv_mpu6050_switch_engine(st, true,
+					INV_MPU6050_BIT_PWR_GYRO_STBY);
+			if (result)
+				return result;
+		}
+		if (st->chip_config.accl_fifo_enable) {
+			result = inv_mpu6050_switch_engine(st, true,
+					INV_MPU6050_BIT_PWR_ACCL_STBY);
+			if (result)
+				return result;
+		}
+		result = inv_reset_fifo(indio_dev);
+		if (result)
+			return result;
+	} else {
+		result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
+		if (result)
+			return result;
+
+		result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
+		if (result)
+			return result;
+
+		result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
+		if (result)
+			return result;
+
+		result = inv_mpu6050_switch_engine(st, false,
+					INV_MPU6050_BIT_PWR_GYRO_STBY);
+		if (result)
+			return result;
+
+		result = inv_mpu6050_switch_engine(st, false,
+					INV_MPU6050_BIT_PWR_ACCL_STBY);
+		if (result)
+			return result;
+		result = inv_mpu6050_set_power_itg(st, false);
+		if (result)
+			return result;
+	}
+	st->chip_config.enable = enable;
+
+	return 0;
+}
+
+/**
+ * inv_mpu_data_rdy_trigger_set_state() - set data ready interrupt state
+ * @trig: Trigger instance
+ * @state: Desired trigger state
+ */
+static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig,
+						bool state)
+{
+	return inv_mpu6050_set_enable(trig->private_data, state);
+}
+
+static const struct iio_trigger_ops inv_mpu_trigger_ops = {
+	.owner = THIS_MODULE,
+	.set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
+};
+
+int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+	st->trig = iio_trigger_alloc("%s-dev%d",
+					indio_dev->name,
+					indio_dev->id);
+	if (st->trig == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	ret = request_irq(st->client->irq, &iio_trigger_generic_data_rdy_poll,
+				IRQF_TRIGGER_RISING,
+				"inv_mpu",
+				st->trig);
+	if (ret)
+		goto error_free_trig;
+	st->trig->dev.parent = &st->client->dev;
+	st->trig->private_data = indio_dev;
+	st->trig->ops = &inv_mpu_trigger_ops;
+	ret = iio_trigger_register(st->trig);
+	if (ret)
+		goto error_free_irq;
+	indio_dev->trig = st->trig;
+
+	return 0;
+
+error_free_irq:
+	free_irq(st->client->irq, st->trig);
+error_free_trig:
+	iio_trigger_free(st->trig);
+error_ret:
+	return ret;
+}
+
+void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st)
+{
+	iio_trigger_unregister(st->trig);
+	free_irq(st->client->irq, st->trig);
+	iio_trigger_free(st->trig);
+}