1
2
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4
5
6#include <linux/acpi.h>
7#include <linux/delay.h>
8#include <linux/err.h>
9#include <linux/i2c.h>
10#include <linux/iio/iio.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/property.h>
14#include "inv_mpu_iio.h"
15
16static const struct regmap_config inv_mpu_regmap_config = {
17 .reg_bits = 8,
18 .val_bits = 8,
19};
20
21static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id)
22{
23 return 0;
24}
25
26static bool inv_mpu_i2c_aux_bus(struct device *dev)
27{
28 struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
29
30 switch (st->chip_type) {
31 case INV_ICM20608:
32 case INV_ICM20609:
33 case INV_ICM20689:
34 case INV_ICM20602:
35 case INV_IAM20680:
36
37 return false;
38 case INV_MPU9150:
39 case INV_MPU9250:
40 case INV_MPU9255:
41 if (st->magn_disabled)
42 return true;
43 else
44 return false;
45 default:
46 return true;
47 }
48}
49
50static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev)
51{
52 struct inv_mpu6050_state *st = iio_priv(indio_dev);
53 struct device *dev = indio_dev->dev.parent;
54 struct device_node *mux_node;
55 int ret;
56
57
58
59
60
61
62
63
64 switch (st->chip_type) {
65 case INV_MPU9150:
66 case INV_MPU9250:
67 case INV_MPU9255:
68 mux_node = of_get_child_by_name(dev->of_node, "i2c-gate");
69 if (mux_node != NULL) {
70 st->magn_disabled = true;
71 dev_warn(dev, "disable internal use of magnetometer\n");
72 }
73 of_node_put(mux_node);
74 break;
75 default:
76 break;
77 }
78
79
80 if (inv_mpu_i2c_aux_bus(dev)) {
81 ret = regmap_write(st->map, st->reg->int_pin_cfg,
82 st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
83 if (ret)
84 return ret;
85 }
86
87 return 0;
88}
89
90
91
92
93
94
95
96
97static int inv_mpu_probe(struct i2c_client *client,
98 const struct i2c_device_id *id)
99{
100 const void *match;
101 struct inv_mpu6050_state *st;
102 int result;
103 enum inv_devices chip_type;
104 struct regmap *regmap;
105 const char *name;
106
107 if (!i2c_check_functionality(client->adapter,
108 I2C_FUNC_SMBUS_I2C_BLOCK))
109 return -EOPNOTSUPP;
110
111 match = device_get_match_data(&client->dev);
112 if (match) {
113 chip_type = (uintptr_t)match;
114 name = client->name;
115 } else if (id) {
116 chip_type = (enum inv_devices)
117 id->driver_data;
118 name = id->name;
119 } else {
120 return -ENOSYS;
121 }
122
123 regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
124 if (IS_ERR(regmap)) {
125 dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
126 regmap);
127 return PTR_ERR(regmap);
128 }
129
130 result = inv_mpu_core_probe(regmap, client->irq, name,
131 inv_mpu_i2c_aux_setup, chip_type);
132 if (result < 0)
133 return result;
134
135 st = iio_priv(dev_get_drvdata(&client->dev));
136 if (inv_mpu_i2c_aux_bus(&client->dev)) {
137
138 st->muxc = i2c_mux_alloc(client->adapter, &client->dev,
139 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
140 inv_mpu6050_select_bypass, NULL);
141 if (!st->muxc)
142 return -ENOMEM;
143 st->muxc->priv = dev_get_drvdata(&client->dev);
144 result = i2c_mux_add_adapter(st->muxc, 0, 0, 0);
145 if (result)
146 return result;
147 result = inv_mpu_acpi_create_mux_client(client);
148 if (result)
149 goto out_del_mux;
150 }
151
152 return 0;
153
154out_del_mux:
155 i2c_mux_del_adapters(st->muxc);
156 return result;
157}
158
159static int inv_mpu_remove(struct i2c_client *client)
160{
161 struct iio_dev *indio_dev = i2c_get_clientdata(client);
162 struct inv_mpu6050_state *st = iio_priv(indio_dev);
163
164 if (st->muxc) {
165 inv_mpu_acpi_delete_mux_client(client);
166 i2c_mux_del_adapters(st->muxc);
167 }
168
169 return 0;
170}
171
172
173
174
175
176static const struct i2c_device_id inv_mpu_id[] = {
177 {"mpu6050", INV_MPU6050},
178 {"mpu6500", INV_MPU6500},
179 {"mpu6515", INV_MPU6515},
180 {"mpu6880", INV_MPU6880},
181 {"mpu9150", INV_MPU9150},
182 {"mpu9250", INV_MPU9250},
183 {"mpu9255", INV_MPU9255},
184 {"icm20608", INV_ICM20608},
185 {"icm20609", INV_ICM20609},
186 {"icm20689", INV_ICM20689},
187 {"icm20602", INV_ICM20602},
188 {"icm20690", INV_ICM20690},
189 {"iam20680", INV_IAM20680},
190 {}
191};
192
193MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
194
195static const struct of_device_id inv_of_match[] = {
196 {
197 .compatible = "invensense,mpu6050",
198 .data = (void *)INV_MPU6050
199 },
200 {
201 .compatible = "invensense,mpu6500",
202 .data = (void *)INV_MPU6500
203 },
204 {
205 .compatible = "invensense,mpu6515",
206 .data = (void *)INV_MPU6515
207 },
208 {
209 .compatible = "invensense,mpu6880",
210 .data = (void *)INV_MPU6880
211 },
212 {
213 .compatible = "invensense,mpu9150",
214 .data = (void *)INV_MPU9150
215 },
216 {
217 .compatible = "invensense,mpu9250",
218 .data = (void *)INV_MPU9250
219 },
220 {
221 .compatible = "invensense,mpu9255",
222 .data = (void *)INV_MPU9255
223 },
224 {
225 .compatible = "invensense,icm20608",
226 .data = (void *)INV_ICM20608
227 },
228 {
229 .compatible = "invensense,icm20609",
230 .data = (void *)INV_ICM20609
231 },
232 {
233 .compatible = "invensense,icm20689",
234 .data = (void *)INV_ICM20689
235 },
236 {
237 .compatible = "invensense,icm20602",
238 .data = (void *)INV_ICM20602
239 },
240 {
241 .compatible = "invensense,icm20690",
242 .data = (void *)INV_ICM20690
243 },
244 {
245 .compatible = "invensense,iam20680",
246 .data = (void *)INV_IAM20680
247 },
248 { }
249};
250MODULE_DEVICE_TABLE(of, inv_of_match);
251
252static const struct acpi_device_id __maybe_unused inv_acpi_match[] = {
253 {"INVN6500", INV_MPU6500},
254 { },
255};
256
257MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
258
259static struct i2c_driver inv_mpu_driver = {
260 .probe = inv_mpu_probe,
261 .remove = inv_mpu_remove,
262 .id_table = inv_mpu_id,
263 .driver = {
264 .of_match_table = inv_of_match,
265 .acpi_match_table = ACPI_PTR(inv_acpi_match),
266 .name = "inv-mpu6050-i2c",
267 .pm = &inv_mpu_pmops,
268 },
269};
270
271module_i2c_driver(inv_mpu_driver);
272
273MODULE_AUTHOR("Invensense Corporation");
274MODULE_DESCRIPTION("Invensense device MPU6050 driver");
275MODULE_LICENSE("GPL");
276
