2 * Copyright (C) 2012 Invensense, Inc.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include "inv_mpu_iio.h"
16 static void inv_scan_query(struct iio_dev *indio_dev)
18 struct inv_mpu6050_state *st = iio_priv(indio_dev);
20 st->chip_config.gyro_fifo_enable =
21 test_bit(INV_MPU6050_SCAN_GYRO_X,
22 indio_dev->active_scan_mask) ||
23 test_bit(INV_MPU6050_SCAN_GYRO_Y,
24 indio_dev->active_scan_mask) ||
25 test_bit(INV_MPU6050_SCAN_GYRO_Z,
26 indio_dev->active_scan_mask);
28 st->chip_config.accl_fifo_enable =
29 test_bit(INV_MPU6050_SCAN_ACCL_X,
30 indio_dev->active_scan_mask) ||
31 test_bit(INV_MPU6050_SCAN_ACCL_Y,
32 indio_dev->active_scan_mask) ||
33 test_bit(INV_MPU6050_SCAN_ACCL_Z,
34 indio_dev->active_scan_mask);
38 * inv_mpu6050_set_enable() - enable chip functions.
39 * @indio_dev: Device driver instance.
40 * @enable: enable/disable
42 static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
44 struct inv_mpu6050_state *st = iio_priv(indio_dev);
48 result = inv_mpu6050_set_power_itg(st, true);
51 inv_scan_query(indio_dev);
53 if (st->chip_config.gyro_fifo_enable) {
54 result = inv_mpu6050_switch_engine(st, true,
55 INV_MPU6050_BIT_PWR_GYRO_STBY);
58 /* gyro first sample is out of specs, skip it */
61 if (st->chip_config.accl_fifo_enable) {
62 result = inv_mpu6050_switch_engine(st, true,
63 INV_MPU6050_BIT_PWR_ACCL_STBY);
67 result = inv_reset_fifo(indio_dev);
71 result = regmap_write(st->map, st->reg->fifo_en, 0);
75 result = regmap_write(st->map, st->reg->int_enable, 0);
79 result = regmap_write(st->map, st->reg->user_ctrl,
80 st->chip_config.user_ctrl);
84 result = inv_mpu6050_switch_engine(st, false,
85 INV_MPU6050_BIT_PWR_ACCL_STBY);
89 result = inv_mpu6050_switch_engine(st, false,
90 INV_MPU6050_BIT_PWR_GYRO_STBY);
94 result = inv_mpu6050_set_power_itg(st, false);
102 if (st->chip_config.accl_fifo_enable)
103 inv_mpu6050_switch_engine(st, false,
104 INV_MPU6050_BIT_PWR_ACCL_STBY);
106 if (st->chip_config.gyro_fifo_enable)
107 inv_mpu6050_switch_engine(st, false,
108 INV_MPU6050_BIT_PWR_GYRO_STBY);
110 inv_mpu6050_set_power_itg(st, false);
115 * inv_mpu_data_rdy_trigger_set_state() - set data ready interrupt state
116 * @trig: Trigger instance
117 * @state: Desired trigger state
119 static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig,
122 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
123 struct inv_mpu6050_state *st = iio_priv(indio_dev);
126 mutex_lock(&st->lock);
127 result = inv_mpu6050_set_enable(indio_dev, state);
128 mutex_unlock(&st->lock);
133 static const struct iio_trigger_ops inv_mpu_trigger_ops = {
134 .set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
137 int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
140 struct inv_mpu6050_state *st = iio_priv(indio_dev);
142 st->trig = devm_iio_trigger_alloc(&indio_dev->dev,
149 ret = devm_request_irq(&indio_dev->dev, st->irq,
150 &iio_trigger_generic_data_rdy_poll,
157 st->trig->dev.parent = regmap_get_device(st->map);
158 st->trig->ops = &inv_mpu_trigger_ops;
159 iio_trigger_set_drvdata(st->trig, indio_dev);
161 ret = devm_iio_trigger_register(&indio_dev->dev, st->trig);
165 indio_dev->trig = iio_trigger_get(st->trig);