This source file includes following definitions.
- inv_scan_query
- inv_mpu6050_set_enable
- inv_mpu_data_rdy_trigger_set_state
- inv_mpu6050_probe_trigger
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5
6 #include "inv_mpu_iio.h"
7
8 static void inv_scan_query(struct iio_dev *indio_dev)
9 {
10 struct inv_mpu6050_state *st = iio_priv(indio_dev);
11
12 st->chip_config.gyro_fifo_enable =
13 test_bit(INV_MPU6050_SCAN_GYRO_X,
14 indio_dev->active_scan_mask) ||
15 test_bit(INV_MPU6050_SCAN_GYRO_Y,
16 indio_dev->active_scan_mask) ||
17 test_bit(INV_MPU6050_SCAN_GYRO_Z,
18 indio_dev->active_scan_mask);
19
20 st->chip_config.accl_fifo_enable =
21 test_bit(INV_MPU6050_SCAN_ACCL_X,
22 indio_dev->active_scan_mask) ||
23 test_bit(INV_MPU6050_SCAN_ACCL_Y,
24 indio_dev->active_scan_mask) ||
25 test_bit(INV_MPU6050_SCAN_ACCL_Z,
26 indio_dev->active_scan_mask);
27 }
28
29
30
31
32
33
34 static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
35 {
36 struct inv_mpu6050_state *st = iio_priv(indio_dev);
37 int result;
38
39 if (enable) {
40 result = inv_mpu6050_set_power_itg(st, true);
41 if (result)
42 return result;
43 inv_scan_query(indio_dev);
44 st->skip_samples = 0;
45 if (st->chip_config.gyro_fifo_enable) {
46 result = inv_mpu6050_switch_engine(st, true,
47 INV_MPU6050_BIT_PWR_GYRO_STBY);
48 if (result)
49 goto error_power_off;
50
51 st->skip_samples = 1;
52 }
53 if (st->chip_config.accl_fifo_enable) {
54 result = inv_mpu6050_switch_engine(st, true,
55 INV_MPU6050_BIT_PWR_ACCL_STBY);
56 if (result)
57 goto error_gyro_off;
58 }
59 result = inv_reset_fifo(indio_dev);
60 if (result)
61 goto error_accl_off;
62 } else {
63 result = regmap_write(st->map, st->reg->fifo_en, 0);
64 if (result)
65 goto error_accl_off;
66
67 result = regmap_write(st->map, st->reg->int_enable, 0);
68 if (result)
69 goto error_accl_off;
70
71 result = regmap_write(st->map, st->reg->user_ctrl,
72 st->chip_config.user_ctrl);
73 if (result)
74 goto error_accl_off;
75
76 result = inv_mpu6050_switch_engine(st, false,
77 INV_MPU6050_BIT_PWR_ACCL_STBY);
78 if (result)
79 goto error_accl_off;
80
81 result = inv_mpu6050_switch_engine(st, false,
82 INV_MPU6050_BIT_PWR_GYRO_STBY);
83 if (result)
84 goto error_gyro_off;
85
86 result = inv_mpu6050_set_power_itg(st, false);
87 if (result)
88 goto error_power_off;
89 }
90
91 return 0;
92
93 error_accl_off:
94 if (st->chip_config.accl_fifo_enable)
95 inv_mpu6050_switch_engine(st, false,
96 INV_MPU6050_BIT_PWR_ACCL_STBY);
97 error_gyro_off:
98 if (st->chip_config.gyro_fifo_enable)
99 inv_mpu6050_switch_engine(st, false,
100 INV_MPU6050_BIT_PWR_GYRO_STBY);
101 error_power_off:
102 inv_mpu6050_set_power_itg(st, false);
103 return result;
104 }
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110
111 static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig,
112 bool state)
113 {
114 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
115 struct inv_mpu6050_state *st = iio_priv(indio_dev);
116 int result;
117
118 mutex_lock(&st->lock);
119 result = inv_mpu6050_set_enable(indio_dev, state);
120 mutex_unlock(&st->lock);
121
122 return result;
123 }
124
125 static const struct iio_trigger_ops inv_mpu_trigger_ops = {
126 .set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
127 };
128
129 int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
130 {
131 int ret;
132 struct inv_mpu6050_state *st = iio_priv(indio_dev);
133
134 st->trig = devm_iio_trigger_alloc(&indio_dev->dev,
135 "%s-dev%d",
136 indio_dev->name,
137 indio_dev->id);
138 if (!st->trig)
139 return -ENOMEM;
140
141 ret = devm_request_irq(&indio_dev->dev, st->irq,
142 &iio_trigger_generic_data_rdy_poll,
143 irq_type,
144 "inv_mpu",
145 st->trig);
146 if (ret)
147 return ret;
148
149 st->trig->dev.parent = regmap_get_device(st->map);
150 st->trig->ops = &inv_mpu_trigger_ops;
151 iio_trigger_set_drvdata(st->trig, indio_dev);
152
153 ret = devm_iio_trigger_register(&indio_dev->dev, st->trig);
154 if (ret)
155 return ret;
156
157 indio_dev->trig = iio_trigger_get(st->trig);
158
159 return 0;
160 }