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4fd1ebb1 KT |
1 | /* |
2 | * LSM303DLHC I2C magnetometer. | |
3 | * | |
4 | * Copyright (C) 2021 Linaro Ltd. | |
5 | * Written by Kevin Townsend <kevin.townsend@linaro.org> | |
6 | * | |
7 | * Based on: https://www.st.com/resource/en/datasheet/lsm303dlhc.pdf | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0-or-later | |
10 | */ | |
11 | ||
12 | /* | |
13 | * The I2C address associated with this device is set on the command-line when | |
14 | * initialising the machine, but the following address is standard: 0x1E. | |
15 | * | |
16 | * Get and set functions for 'mag-x', 'mag-y' and 'mag-z' assume that | |
17 | * 1 = 0.001 uT. (NOTE the 1 gauss = 100 uT, so setting a value of 100,000 | |
18 | * would be equal to 1 gauss or 100 uT.) | |
19 | * | |
20 | * Get and set functions for 'temperature' assume that 1 = 0.001 C, so 23.6 C | |
21 | * would be equal to 23600. | |
22 | */ | |
23 | ||
24 | #include "qemu/osdep.h" | |
25 | #include "hw/i2c/i2c.h" | |
26 | #include "migration/vmstate.h" | |
27 | #include "qapi/error.h" | |
28 | #include "qapi/visitor.h" | |
29 | #include "qemu/module.h" | |
30 | #include "qemu/log.h" | |
31 | #include "qemu/bswap.h" | |
32 | ||
33 | enum LSM303DLHCMagReg { | |
34 | LSM303DLHC_MAG_REG_CRA = 0x00, | |
35 | LSM303DLHC_MAG_REG_CRB = 0x01, | |
36 | LSM303DLHC_MAG_REG_MR = 0x02, | |
37 | LSM303DLHC_MAG_REG_OUT_X_H = 0x03, | |
38 | LSM303DLHC_MAG_REG_OUT_X_L = 0x04, | |
39 | LSM303DLHC_MAG_REG_OUT_Z_H = 0x05, | |
40 | LSM303DLHC_MAG_REG_OUT_Z_L = 0x06, | |
41 | LSM303DLHC_MAG_REG_OUT_Y_H = 0x07, | |
42 | LSM303DLHC_MAG_REG_OUT_Y_L = 0x08, | |
43 | LSM303DLHC_MAG_REG_SR = 0x09, | |
44 | LSM303DLHC_MAG_REG_IRA = 0x0A, | |
45 | LSM303DLHC_MAG_REG_IRB = 0x0B, | |
46 | LSM303DLHC_MAG_REG_IRC = 0x0C, | |
47 | LSM303DLHC_MAG_REG_TEMP_OUT_H = 0x31, | |
48 | LSM303DLHC_MAG_REG_TEMP_OUT_L = 0x32 | |
49 | }; | |
50 | ||
51 | typedef struct LSM303DLHCMagState { | |
52 | I2CSlave parent_obj; | |
53 | uint8_t cra; | |
54 | uint8_t crb; | |
55 | uint8_t mr; | |
56 | int16_t x; | |
57 | int16_t z; | |
58 | int16_t y; | |
59 | int16_t x_lock; | |
60 | int16_t z_lock; | |
61 | int16_t y_lock; | |
62 | uint8_t sr; | |
63 | uint8_t ira; | |
64 | uint8_t irb; | |
65 | uint8_t irc; | |
66 | int16_t temperature; | |
67 | int16_t temperature_lock; | |
68 | uint8_t len; | |
69 | uint8_t buf; | |
70 | uint8_t pointer; | |
71 | } LSM303DLHCMagState; | |
72 | ||
73 | #define TYPE_LSM303DLHC_MAG "lsm303dlhc_mag" | |
74 | OBJECT_DECLARE_SIMPLE_TYPE(LSM303DLHCMagState, LSM303DLHC_MAG) | |
75 | ||
76 | /* | |
77 | * Conversion factor from Gauss to sensor values for each GN gain setting, | |
78 | * in units "lsb per Gauss" (see data sheet table 3). There is no documented | |
79 | * behaviour if the GN setting in CRB is incorrectly set to 0b000; | |
80 | * we arbitrarily make it the same as 0b001. | |
81 | */ | |
82 | uint32_t xy_gain[] = { 1100, 1100, 855, 670, 450, 400, 330, 230 }; | |
83 | uint32_t z_gain[] = { 980, 980, 760, 600, 400, 355, 295, 205 }; | |
84 | ||
85 | static void lsm303dlhc_mag_get_x(Object *obj, Visitor *v, const char *name, | |
86 | void *opaque, Error **errp) | |
87 | { | |
88 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
89 | int gm = extract32(s->crb, 5, 3); | |
90 | ||
91 | /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */ | |
92 | int64_t value = muldiv64(s->x, 100000, xy_gain[gm]); | |
93 | visit_type_int(v, name, &value, errp); | |
94 | } | |
95 | ||
96 | static void lsm303dlhc_mag_get_y(Object *obj, Visitor *v, const char *name, | |
97 | void *opaque, Error **errp) | |
98 | { | |
99 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
100 | int gm = extract32(s->crb, 5, 3); | |
101 | ||
102 | /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */ | |
103 | int64_t value = muldiv64(s->y, 100000, xy_gain[gm]); | |
104 | visit_type_int(v, name, &value, errp); | |
105 | } | |
106 | ||
107 | static void lsm303dlhc_mag_get_z(Object *obj, Visitor *v, const char *name, | |
108 | void *opaque, Error **errp) | |
109 | { | |
110 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
111 | int gm = extract32(s->crb, 5, 3); | |
112 | ||
113 | /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */ | |
114 | int64_t value = muldiv64(s->z, 100000, z_gain[gm]); | |
115 | visit_type_int(v, name, &value, errp); | |
116 | } | |
117 | ||
118 | static void lsm303dlhc_mag_set_x(Object *obj, Visitor *v, const char *name, | |
119 | void *opaque, Error **errp) | |
120 | { | |
121 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
122 | int64_t value; | |
123 | int64_t reg; | |
124 | int gm = extract32(s->crb, 5, 3); | |
125 | ||
126 | if (!visit_type_int(v, name, &value, errp)) { | |
127 | return; | |
128 | } | |
129 | ||
130 | reg = muldiv64(value, xy_gain[gm], 100000); | |
131 | ||
132 | /* Make sure we are within a 12-bit limit. */ | |
133 | if (reg > 2047 || reg < -2048) { | |
134 | error_setg(errp, "value %" PRId64 " out of register's range", value); | |
135 | return; | |
136 | } | |
137 | ||
138 | s->x = (int16_t)reg; | |
139 | } | |
140 | ||
141 | static void lsm303dlhc_mag_set_y(Object *obj, Visitor *v, const char *name, | |
142 | void *opaque, Error **errp) | |
143 | { | |
144 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
145 | int64_t value; | |
146 | int64_t reg; | |
147 | int gm = extract32(s->crb, 5, 3); | |
148 | ||
149 | if (!visit_type_int(v, name, &value, errp)) { | |
150 | return; | |
151 | } | |
152 | ||
153 | reg = muldiv64(value, xy_gain[gm], 100000); | |
154 | ||
155 | /* Make sure we are within a 12-bit limit. */ | |
156 | if (reg > 2047 || reg < -2048) { | |
157 | error_setg(errp, "value %" PRId64 " out of register's range", value); | |
158 | return; | |
159 | } | |
160 | ||
161 | s->y = (int16_t)reg; | |
162 | } | |
163 | ||
164 | static void lsm303dlhc_mag_set_z(Object *obj, Visitor *v, const char *name, | |
165 | void *opaque, Error **errp) | |
166 | { | |
167 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
168 | int64_t value; | |
169 | int64_t reg; | |
170 | int gm = extract32(s->crb, 5, 3); | |
171 | ||
172 | if (!visit_type_int(v, name, &value, errp)) { | |
173 | return; | |
174 | } | |
175 | ||
176 | reg = muldiv64(value, z_gain[gm], 100000); | |
177 | ||
178 | /* Make sure we are within a 12-bit limit. */ | |
179 | if (reg > 2047 || reg < -2048) { | |
180 | error_setg(errp, "value %" PRId64 " out of register's range", value); | |
181 | return; | |
182 | } | |
183 | ||
184 | s->z = (int16_t)reg; | |
185 | } | |
186 | ||
187 | /* | |
188 | * Get handler for the temperature property. | |
189 | */ | |
190 | static void lsm303dlhc_mag_get_temperature(Object *obj, Visitor *v, | |
191 | const char *name, void *opaque, | |
192 | Error **errp) | |
193 | { | |
194 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
195 | int64_t value; | |
196 | ||
197 | /* Convert to 1 lsb = 0.125 C to 1 = 0.001 C for 'temperature' property. */ | |
198 | value = s->temperature * 125; | |
199 | ||
200 | visit_type_int(v, name, &value, errp); | |
201 | } | |
202 | ||
203 | /* | |
204 | * Set handler for the temperature property. | |
205 | */ | |
206 | static void lsm303dlhc_mag_set_temperature(Object *obj, Visitor *v, | |
207 | const char *name, void *opaque, | |
208 | Error **errp) | |
209 | { | |
210 | LSM303DLHCMagState *s = LSM303DLHC_MAG(obj); | |
211 | int64_t value; | |
212 | ||
213 | if (!visit_type_int(v, name, &value, errp)) { | |
214 | return; | |
215 | } | |
216 | ||
217 | /* Input temperature is in 0.001 C units. Convert to 1 lsb = 0.125 C. */ | |
218 | value /= 125; | |
219 | ||
220 | if (value > 2047 || value < -2048) { | |
221 | error_setg(errp, "value %" PRId64 " lsb is out of range", value); | |
222 | return; | |
223 | } | |
224 | ||
225 | s->temperature = (int16_t)value; | |
226 | } | |
227 | ||
228 | /* | |
229 | * Callback handler whenever a 'I2C_START_RECV' (read) event is received. | |
230 | */ | |
231 | static void lsm303dlhc_mag_read(LSM303DLHCMagState *s) | |
232 | { | |
233 | /* | |
234 | * Set the LOCK bit whenever a new read attempt is made. This will be | |
235 | * cleared in I2C_FINISH. Note that DRDY is always set to 1 in this driver. | |
236 | */ | |
237 | s->sr = 0x3; | |
238 | ||
239 | /* | |
240 | * Copy the current X/Y/Z and temp. values into the locked registers so | |
241 | * that 'mag-x', 'mag-y', 'mag-z' and 'temperature' can continue to be | |
242 | * updated via QOM, etc., without corrupting the current read event. | |
243 | */ | |
244 | s->x_lock = s->x; | |
245 | s->z_lock = s->z; | |
246 | s->y_lock = s->y; | |
247 | s->temperature_lock = s->temperature; | |
248 | } | |
249 | ||
250 | /* | |
251 | * Callback handler whenever a 'I2C_FINISH' event is received. | |
252 | */ | |
253 | static void lsm303dlhc_mag_finish(LSM303DLHCMagState *s) | |
254 | { | |
255 | /* | |
256 | * Clear the LOCK bit when the read attempt terminates. | |
257 | * This bit is initially set in the I2C_START_RECV handler. | |
258 | */ | |
259 | s->sr = 0x1; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Callback handler when a device attempts to write to a register. | |
264 | */ | |
265 | static void lsm303dlhc_mag_write(LSM303DLHCMagState *s) | |
266 | { | |
267 | switch (s->pointer) { | |
268 | case LSM303DLHC_MAG_REG_CRA: | |
269 | s->cra = s->buf; | |
270 | break; | |
271 | case LSM303DLHC_MAG_REG_CRB: | |
272 | /* Make sure gain is at least 1, falling back to 1 on an error. */ | |
273 | if (s->buf >> 5 == 0) { | |
274 | s->buf = 1 << 5; | |
275 | } | |
276 | s->crb = s->buf; | |
277 | break; | |
278 | case LSM303DLHC_MAG_REG_MR: | |
279 | s->mr = s->buf; | |
280 | break; | |
281 | case LSM303DLHC_MAG_REG_SR: | |
282 | s->sr = s->buf; | |
283 | break; | |
284 | case LSM303DLHC_MAG_REG_IRA: | |
285 | s->ira = s->buf; | |
286 | break; | |
287 | case LSM303DLHC_MAG_REG_IRB: | |
288 | s->irb = s->buf; | |
289 | break; | |
290 | case LSM303DLHC_MAG_REG_IRC: | |
291 | s->irc = s->buf; | |
292 | break; | |
293 | default: | |
294 | qemu_log_mask(LOG_GUEST_ERROR, "reg is read-only: 0x%02X", s->buf); | |
295 | break; | |
296 | } | |
297 | } | |
298 | ||
299 | /* | |
300 | * Low-level master-to-slave transaction handler. | |
301 | */ | |
302 | static int lsm303dlhc_mag_send(I2CSlave *i2c, uint8_t data) | |
303 | { | |
304 | LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c); | |
305 | ||
306 | if (s->len == 0) { | |
307 | /* First byte is the reg pointer */ | |
308 | s->pointer = data; | |
309 | s->len++; | |
310 | } else if (s->len == 1) { | |
311 | /* Second byte is the new register value. */ | |
312 | s->buf = data; | |
313 | lsm303dlhc_mag_write(s); | |
314 | } else { | |
315 | g_assert_not_reached(); | |
316 | } | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Low-level slave-to-master transaction handler (read attempts). | |
323 | */ | |
324 | static uint8_t lsm303dlhc_mag_recv(I2CSlave *i2c) | |
325 | { | |
326 | LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c); | |
327 | uint8_t resp; | |
328 | ||
329 | switch (s->pointer) { | |
330 | case LSM303DLHC_MAG_REG_CRA: | |
331 | resp = s->cra; | |
332 | break; | |
333 | case LSM303DLHC_MAG_REG_CRB: | |
334 | resp = s->crb; | |
335 | break; | |
336 | case LSM303DLHC_MAG_REG_MR: | |
337 | resp = s->mr; | |
338 | break; | |
339 | case LSM303DLHC_MAG_REG_OUT_X_H: | |
340 | resp = (uint8_t)(s->x_lock >> 8); | |
341 | break; | |
342 | case LSM303DLHC_MAG_REG_OUT_X_L: | |
343 | resp = (uint8_t)(s->x_lock); | |
344 | break; | |
345 | case LSM303DLHC_MAG_REG_OUT_Z_H: | |
346 | resp = (uint8_t)(s->z_lock >> 8); | |
347 | break; | |
348 | case LSM303DLHC_MAG_REG_OUT_Z_L: | |
349 | resp = (uint8_t)(s->z_lock); | |
350 | break; | |
351 | case LSM303DLHC_MAG_REG_OUT_Y_H: | |
352 | resp = (uint8_t)(s->y_lock >> 8); | |
353 | break; | |
354 | case LSM303DLHC_MAG_REG_OUT_Y_L: | |
355 | resp = (uint8_t)(s->y_lock); | |
356 | break; | |
357 | case LSM303DLHC_MAG_REG_SR: | |
358 | resp = s->sr; | |
359 | break; | |
360 | case LSM303DLHC_MAG_REG_IRA: | |
361 | resp = s->ira; | |
362 | break; | |
363 | case LSM303DLHC_MAG_REG_IRB: | |
364 | resp = s->irb; | |
365 | break; | |
366 | case LSM303DLHC_MAG_REG_IRC: | |
367 | resp = s->irc; | |
368 | break; | |
369 | case LSM303DLHC_MAG_REG_TEMP_OUT_H: | |
370 | /* Check if the temperature sensor is enabled or not (CRA & 0x80). */ | |
371 | if (s->cra & 0x80) { | |
372 | resp = (uint8_t)(s->temperature_lock >> 8); | |
373 | } else { | |
374 | resp = 0; | |
375 | } | |
376 | break; | |
377 | case LSM303DLHC_MAG_REG_TEMP_OUT_L: | |
378 | if (s->cra & 0x80) { | |
379 | resp = (uint8_t)(s->temperature_lock & 0xff); | |
380 | } else { | |
381 | resp = 0; | |
382 | } | |
383 | break; | |
384 | default: | |
385 | resp = 0; | |
386 | break; | |
387 | } | |
388 | ||
389 | /* | |
390 | * The address pointer on the LSM303DLHC auto-increments whenever a byte | |
391 | * is read, without the master device having to request the next address. | |
392 | * | |
393 | * The auto-increment process has the following logic: | |
394 | * | |
395 | * - if (s->pointer == 8) then s->pointer = 3 | |
396 | * - else: if (s->pointer == 12) then s->pointer = 0 | |
397 | * - else: s->pointer += 1 | |
398 | * | |
399 | * Reading an invalid address return 0. | |
400 | */ | |
401 | if (s->pointer == LSM303DLHC_MAG_REG_OUT_Y_L) { | |
402 | s->pointer = LSM303DLHC_MAG_REG_OUT_X_H; | |
403 | } else if (s->pointer == LSM303DLHC_MAG_REG_IRC) { | |
404 | s->pointer = LSM303DLHC_MAG_REG_CRA; | |
405 | } else { | |
406 | s->pointer++; | |
407 | } | |
408 | ||
409 | return resp; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Bus state change handler. | |
414 | */ | |
415 | static int lsm303dlhc_mag_event(I2CSlave *i2c, enum i2c_event event) | |
416 | { | |
417 | LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c); | |
418 | ||
419 | switch (event) { | |
420 | case I2C_START_SEND: | |
421 | break; | |
422 | case I2C_START_RECV: | |
423 | lsm303dlhc_mag_read(s); | |
424 | break; | |
425 | case I2C_FINISH: | |
426 | lsm303dlhc_mag_finish(s); | |
427 | break; | |
428 | case I2C_NACK: | |
429 | break; | |
a78e9839 KJ |
430 | default: |
431 | return -1; | |
4fd1ebb1 KT |
432 | } |
433 | ||
434 | s->len = 0; | |
435 | return 0; | |
436 | } | |
437 | ||
438 | /* | |
439 | * Device data description using VMSTATE macros. | |
440 | */ | |
441 | static const VMStateDescription vmstate_lsm303dlhc_mag = { | |
442 | .name = "LSM303DLHC_MAG", | |
443 | .version_id = 0, | |
444 | .minimum_version_id = 0, | |
af10fff2 | 445 | .fields = (const VMStateField[]) { |
4fd1ebb1 KT |
446 | |
447 | VMSTATE_I2C_SLAVE(parent_obj, LSM303DLHCMagState), | |
448 | VMSTATE_UINT8(len, LSM303DLHCMagState), | |
449 | VMSTATE_UINT8(buf, LSM303DLHCMagState), | |
450 | VMSTATE_UINT8(pointer, LSM303DLHCMagState), | |
451 | VMSTATE_UINT8(cra, LSM303DLHCMagState), | |
452 | VMSTATE_UINT8(crb, LSM303DLHCMagState), | |
453 | VMSTATE_UINT8(mr, LSM303DLHCMagState), | |
454 | VMSTATE_INT16(x, LSM303DLHCMagState), | |
455 | VMSTATE_INT16(z, LSM303DLHCMagState), | |
456 | VMSTATE_INT16(y, LSM303DLHCMagState), | |
457 | VMSTATE_INT16(x_lock, LSM303DLHCMagState), | |
458 | VMSTATE_INT16(z_lock, LSM303DLHCMagState), | |
459 | VMSTATE_INT16(y_lock, LSM303DLHCMagState), | |
460 | VMSTATE_UINT8(sr, LSM303DLHCMagState), | |
461 | VMSTATE_UINT8(ira, LSM303DLHCMagState), | |
462 | VMSTATE_UINT8(irb, LSM303DLHCMagState), | |
463 | VMSTATE_UINT8(irc, LSM303DLHCMagState), | |
464 | VMSTATE_INT16(temperature, LSM303DLHCMagState), | |
465 | VMSTATE_INT16(temperature_lock, LSM303DLHCMagState), | |
466 | VMSTATE_END_OF_LIST() | |
467 | } | |
468 | }; | |
469 | ||
470 | /* | |
471 | * Put the device into post-reset default state. | |
472 | */ | |
473 | static void lsm303dlhc_mag_default_cfg(LSM303DLHCMagState *s) | |
474 | { | |
475 | /* Set the device into is default reset state. */ | |
476 | s->len = 0; | |
477 | s->pointer = 0; /* Current register. */ | |
478 | s->buf = 0; /* Shared buffer. */ | |
479 | s->cra = 0x10; /* Temp Enabled = 0, Data Rate = 15.0 Hz. */ | |
480 | s->crb = 0x20; /* Gain = +/- 1.3 Gauss. */ | |
481 | s->mr = 0x3; /* Operating Mode = Sleep. */ | |
482 | s->x = 0; | |
483 | s->z = 0; | |
484 | s->y = 0; | |
485 | s->x_lock = 0; | |
486 | s->z_lock = 0; | |
487 | s->y_lock = 0; | |
488 | s->sr = 0x1; /* DRDY = 1. */ | |
489 | s->ira = 0x48; | |
490 | s->irb = 0x34; | |
491 | s->irc = 0x33; | |
492 | s->temperature = 0; /* Default to 0 degrees C (0/8 lsb = 0 C). */ | |
493 | s->temperature_lock = 0; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Callback handler when DeviceState 'reset' is set to true. | |
498 | */ | |
499 | static void lsm303dlhc_mag_reset(DeviceState *dev) | |
500 | { | |
501 | I2CSlave *i2c = I2C_SLAVE(dev); | |
502 | LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c); | |
503 | ||
504 | /* Set the device into its default reset state. */ | |
505 | lsm303dlhc_mag_default_cfg(s); | |
506 | } | |
507 | ||
508 | /* | |
509 | * Initialisation of any public properties. | |
510 | */ | |
511 | static void lsm303dlhc_mag_initfn(Object *obj) | |
512 | { | |
513 | object_property_add(obj, "mag-x", "int", | |
514 | lsm303dlhc_mag_get_x, | |
515 | lsm303dlhc_mag_set_x, NULL, NULL); | |
516 | ||
517 | object_property_add(obj, "mag-y", "int", | |
518 | lsm303dlhc_mag_get_y, | |
519 | lsm303dlhc_mag_set_y, NULL, NULL); | |
520 | ||
521 | object_property_add(obj, "mag-z", "int", | |
522 | lsm303dlhc_mag_get_z, | |
523 | lsm303dlhc_mag_set_z, NULL, NULL); | |
524 | ||
525 | object_property_add(obj, "temperature", "int", | |
526 | lsm303dlhc_mag_get_temperature, | |
527 | lsm303dlhc_mag_set_temperature, NULL, NULL); | |
528 | } | |
529 | ||
530 | /* | |
531 | * Set the virtual method pointers (bus state change, tx/rx, etc.). | |
532 | */ | |
533 | static void lsm303dlhc_mag_class_init(ObjectClass *klass, void *data) | |
534 | { | |
535 | DeviceClass *dc = DEVICE_CLASS(klass); | |
536 | I2CSlaveClass *k = I2C_SLAVE_CLASS(klass); | |
537 | ||
538 | dc->reset = lsm303dlhc_mag_reset; | |
539 | dc->vmsd = &vmstate_lsm303dlhc_mag; | |
540 | k->event = lsm303dlhc_mag_event; | |
541 | k->recv = lsm303dlhc_mag_recv; | |
542 | k->send = lsm303dlhc_mag_send; | |
543 | } | |
544 | ||
545 | static const TypeInfo lsm303dlhc_mag_info = { | |
546 | .name = TYPE_LSM303DLHC_MAG, | |
547 | .parent = TYPE_I2C_SLAVE, | |
548 | .instance_size = sizeof(LSM303DLHCMagState), | |
549 | .instance_init = lsm303dlhc_mag_initfn, | |
550 | .class_init = lsm303dlhc_mag_class_init, | |
551 | }; | |
552 | ||
553 | static void lsm303dlhc_mag_register_types(void) | |
554 | { | |
555 | type_register_static(&lsm303dlhc_mag_info); | |
556 | } | |
557 | ||
558 | type_init(lsm303dlhc_mag_register_types) |