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0b9641f5 GA |
1 | /* |
2 | * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. | |
5a86bf34 KH |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 and | |
6 | * only version 2 as published by the Free Software Foundation. | |
7 | * | |
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. | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/idr.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/of.h> | |
19 | #include <linux/of_device.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/spmi.h> | |
5a86bf34 KH |
22 | #include <linux/pm_runtime.h> |
23 | ||
24 | #include <dt-bindings/spmi/spmi.h> | |
a9fce374 AG |
25 | #define CREATE_TRACE_POINTS |
26 | #include <trace/events/spmi.h> | |
5a86bf34 KH |
27 | |
28 | static DEFINE_IDA(ctrl_ida); | |
29 | ||
30 | static void spmi_dev_release(struct device *dev) | |
31 | { | |
32 | struct spmi_device *sdev = to_spmi_device(dev); | |
33 | kfree(sdev); | |
34 | } | |
35 | ||
36 | static const struct device_type spmi_dev_type = { | |
37 | .release = spmi_dev_release, | |
38 | }; | |
39 | ||
40 | static void spmi_ctrl_release(struct device *dev) | |
41 | { | |
42 | struct spmi_controller *ctrl = to_spmi_controller(dev); | |
43 | ida_simple_remove(&ctrl_ida, ctrl->nr); | |
44 | kfree(ctrl); | |
45 | } | |
46 | ||
47 | static const struct device_type spmi_ctrl_type = { | |
48 | .release = spmi_ctrl_release, | |
49 | }; | |
50 | ||
5a86bf34 KH |
51 | static int spmi_device_match(struct device *dev, struct device_driver *drv) |
52 | { | |
53 | if (of_driver_match_device(dev, drv)) | |
54 | return 1; | |
55 | ||
56 | if (drv->name) | |
57 | return strncmp(dev_name(dev), drv->name, | |
58 | SPMI_NAME_SIZE) == 0; | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | /** | |
64 | * spmi_device_add() - add a device previously constructed via spmi_device_alloc() | |
65 | * @sdev: spmi_device to be added | |
66 | */ | |
67 | int spmi_device_add(struct spmi_device *sdev) | |
68 | { | |
69 | struct spmi_controller *ctrl = sdev->ctrl; | |
70 | int err; | |
71 | ||
72 | dev_set_name(&sdev->dev, "%d-%02x", ctrl->nr, sdev->usid); | |
73 | ||
74 | err = device_add(&sdev->dev); | |
75 | if (err < 0) { | |
76 | dev_err(&sdev->dev, "Can't add %s, status %d\n", | |
77 | dev_name(&sdev->dev), err); | |
78 | goto err_device_add; | |
79 | } | |
80 | ||
81 | dev_dbg(&sdev->dev, "device %s registered\n", dev_name(&sdev->dev)); | |
82 | ||
83 | err_device_add: | |
84 | return err; | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(spmi_device_add); | |
87 | ||
88 | /** | |
89 | * spmi_device_remove(): remove an SPMI device | |
90 | * @sdev: spmi_device to be removed | |
91 | */ | |
92 | void spmi_device_remove(struct spmi_device *sdev) | |
93 | { | |
94 | device_unregister(&sdev->dev); | |
95 | } | |
96 | EXPORT_SYMBOL_GPL(spmi_device_remove); | |
97 | ||
98 | static inline int | |
99 | spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid) | |
100 | { | |
a9fce374 AG |
101 | int ret; |
102 | ||
5a86bf34 KH |
103 | if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type) |
104 | return -EINVAL; | |
105 | ||
a9fce374 AG |
106 | ret = ctrl->cmd(ctrl, opcode, sid); |
107 | trace_spmi_cmd(opcode, sid, ret); | |
108 | return ret; | |
5a86bf34 KH |
109 | } |
110 | ||
111 | static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode, | |
112 | u8 sid, u16 addr, u8 *buf, size_t len) | |
113 | { | |
a9fce374 AG |
114 | int ret; |
115 | ||
5a86bf34 KH |
116 | if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type) |
117 | return -EINVAL; | |
118 | ||
a9fce374 AG |
119 | trace_spmi_read_begin(opcode, sid, addr); |
120 | ret = ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len); | |
121 | trace_spmi_read_end(opcode, sid, addr, ret, len, buf); | |
122 | return ret; | |
5a86bf34 KH |
123 | } |
124 | ||
125 | static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode, | |
126 | u8 sid, u16 addr, const u8 *buf, size_t len) | |
127 | { | |
a9fce374 AG |
128 | int ret; |
129 | ||
5a86bf34 KH |
130 | if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type) |
131 | return -EINVAL; | |
132 | ||
a9fce374 AG |
133 | trace_spmi_write_begin(opcode, sid, addr, len, buf); |
134 | ret = ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len); | |
135 | trace_spmi_write_end(opcode, sid, addr, ret); | |
136 | return ret; | |
5a86bf34 KH |
137 | } |
138 | ||
139 | /** | |
140 | * spmi_register_read() - register read | |
141 | * @sdev: SPMI device. | |
142 | * @addr: slave register address (5-bit address). | |
143 | * @buf: buffer to be populated with data from the Slave. | |
144 | * | |
145 | * Reads 1 byte of data from a Slave device register. | |
146 | */ | |
147 | int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf) | |
148 | { | |
149 | /* 5-bit register address */ | |
150 | if (addr > 0x1F) | |
151 | return -EINVAL; | |
152 | ||
153 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_READ, sdev->usid, addr, | |
154 | buf, 1); | |
155 | } | |
156 | EXPORT_SYMBOL_GPL(spmi_register_read); | |
157 | ||
158 | /** | |
159 | * spmi_ext_register_read() - extended register read | |
160 | * @sdev: SPMI device. | |
161 | * @addr: slave register address (8-bit address). | |
162 | * @buf: buffer to be populated with data from the Slave. | |
163 | * @len: the request number of bytes to read (up to 16 bytes). | |
164 | * | |
165 | * Reads up to 16 bytes of data from the extended register space on a | |
166 | * Slave device. | |
167 | */ | |
168 | int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf, | |
169 | size_t len) | |
170 | { | |
171 | /* 8-bit register address, up to 16 bytes */ | |
172 | if (len == 0 || len > 16) | |
173 | return -EINVAL; | |
174 | ||
175 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READ, sdev->usid, addr, | |
176 | buf, len); | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(spmi_ext_register_read); | |
179 | ||
180 | /** | |
181 | * spmi_ext_register_readl() - extended register read long | |
182 | * @sdev: SPMI device. | |
183 | * @addr: slave register address (16-bit address). | |
184 | * @buf: buffer to be populated with data from the Slave. | |
185 | * @len: the request number of bytes to read (up to 8 bytes). | |
186 | * | |
187 | * Reads up to 8 bytes of data from the extended register space on a | |
188 | * Slave device using 16-bit address. | |
189 | */ | |
190 | int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf, | |
191 | size_t len) | |
192 | { | |
193 | /* 16-bit register address, up to 8 bytes */ | |
194 | if (len == 0 || len > 8) | |
195 | return -EINVAL; | |
196 | ||
197 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READL, sdev->usid, addr, | |
198 | buf, len); | |
199 | } | |
200 | EXPORT_SYMBOL_GPL(spmi_ext_register_readl); | |
201 | ||
202 | /** | |
203 | * spmi_register_write() - register write | |
204 | * @sdev: SPMI device | |
205 | * @addr: slave register address (5-bit address). | |
206 | * @data: buffer containing the data to be transferred to the Slave. | |
207 | * | |
208 | * Writes 1 byte of data to a Slave device register. | |
209 | */ | |
210 | int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data) | |
211 | { | |
212 | /* 5-bit register address */ | |
213 | if (addr > 0x1F) | |
214 | return -EINVAL; | |
215 | ||
216 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_WRITE, sdev->usid, addr, | |
217 | &data, 1); | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(spmi_register_write); | |
220 | ||
221 | /** | |
222 | * spmi_register_zero_write() - register zero write | |
223 | * @sdev: SPMI device. | |
224 | * @data: the data to be written to register 0 (7-bits). | |
225 | * | |
226 | * Writes data to register 0 of the Slave device. | |
227 | */ | |
228 | int spmi_register_zero_write(struct spmi_device *sdev, u8 data) | |
229 | { | |
230 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_ZERO_WRITE, sdev->usid, 0, | |
231 | &data, 1); | |
232 | } | |
233 | EXPORT_SYMBOL_GPL(spmi_register_zero_write); | |
234 | ||
235 | /** | |
236 | * spmi_ext_register_write() - extended register write | |
237 | * @sdev: SPMI device. | |
238 | * @addr: slave register address (8-bit address). | |
239 | * @buf: buffer containing the data to be transferred to the Slave. | |
240 | * @len: the request number of bytes to read (up to 16 bytes). | |
241 | * | |
242 | * Writes up to 16 bytes of data to the extended register space of a | |
243 | * Slave device. | |
244 | */ | |
245 | int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf, | |
246 | size_t len) | |
247 | { | |
248 | /* 8-bit register address, up to 16 bytes */ | |
249 | if (len == 0 || len > 16) | |
250 | return -EINVAL; | |
251 | ||
252 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITE, sdev->usid, addr, | |
253 | buf, len); | |
254 | } | |
255 | EXPORT_SYMBOL_GPL(spmi_ext_register_write); | |
256 | ||
257 | /** | |
258 | * spmi_ext_register_writel() - extended register write long | |
259 | * @sdev: SPMI device. | |
260 | * @addr: slave register address (16-bit address). | |
261 | * @buf: buffer containing the data to be transferred to the Slave. | |
262 | * @len: the request number of bytes to read (up to 8 bytes). | |
263 | * | |
264 | * Writes up to 8 bytes of data to the extended register space of a | |
265 | * Slave device using 16-bit address. | |
266 | */ | |
267 | int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf, | |
268 | size_t len) | |
269 | { | |
270 | /* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */ | |
271 | if (len == 0 || len > 8) | |
272 | return -EINVAL; | |
273 | ||
274 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITEL, sdev->usid, | |
275 | addr, buf, len); | |
276 | } | |
277 | EXPORT_SYMBOL_GPL(spmi_ext_register_writel); | |
278 | ||
279 | /** | |
280 | * spmi_command_reset() - sends RESET command to the specified slave | |
281 | * @sdev: SPMI device. | |
282 | * | |
283 | * The Reset command initializes the Slave and forces all registers to | |
284 | * their reset values. The Slave shall enter the STARTUP state after | |
285 | * receiving a Reset command. | |
286 | */ | |
287 | int spmi_command_reset(struct spmi_device *sdev) | |
288 | { | |
289 | return spmi_cmd(sdev->ctrl, SPMI_CMD_RESET, sdev->usid); | |
290 | } | |
291 | EXPORT_SYMBOL_GPL(spmi_command_reset); | |
292 | ||
293 | /** | |
294 | * spmi_command_sleep() - sends SLEEP command to the specified SPMI device | |
295 | * @sdev: SPMI device. | |
296 | * | |
297 | * The Sleep command causes the Slave to enter the user defined SLEEP state. | |
298 | */ | |
299 | int spmi_command_sleep(struct spmi_device *sdev) | |
300 | { | |
301 | return spmi_cmd(sdev->ctrl, SPMI_CMD_SLEEP, sdev->usid); | |
302 | } | |
303 | EXPORT_SYMBOL_GPL(spmi_command_sleep); | |
304 | ||
305 | /** | |
306 | * spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device | |
307 | * @sdev: SPMI device. | |
308 | * | |
309 | * The Wakeup command causes the Slave to move from the SLEEP state to | |
310 | * the ACTIVE state. | |
311 | */ | |
312 | int spmi_command_wakeup(struct spmi_device *sdev) | |
313 | { | |
314 | return spmi_cmd(sdev->ctrl, SPMI_CMD_WAKEUP, sdev->usid); | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(spmi_command_wakeup); | |
317 | ||
318 | /** | |
319 | * spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device | |
320 | * @sdev: SPMI device. | |
321 | * | |
322 | * The Shutdown command causes the Slave to enter the SHUTDOWN state. | |
323 | */ | |
324 | int spmi_command_shutdown(struct spmi_device *sdev) | |
325 | { | |
326 | return spmi_cmd(sdev->ctrl, SPMI_CMD_SHUTDOWN, sdev->usid); | |
327 | } | |
328 | EXPORT_SYMBOL_GPL(spmi_command_shutdown); | |
329 | ||
330 | static int spmi_drv_probe(struct device *dev) | |
331 | { | |
332 | const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); | |
333 | struct spmi_device *sdev = to_spmi_device(dev); | |
334 | int err; | |
335 | ||
5a86bf34 KH |
336 | pm_runtime_get_noresume(dev); |
337 | pm_runtime_set_active(dev); | |
338 | pm_runtime_enable(dev); | |
339 | ||
340 | err = sdrv->probe(sdev); | |
341 | if (err) | |
342 | goto fail_probe; | |
343 | ||
344 | return 0; | |
345 | ||
346 | fail_probe: | |
347 | pm_runtime_disable(dev); | |
348 | pm_runtime_set_suspended(dev); | |
349 | pm_runtime_put_noidle(dev); | |
5a86bf34 KH |
350 | return err; |
351 | } | |
352 | ||
353 | static int spmi_drv_remove(struct device *dev) | |
354 | { | |
355 | const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); | |
356 | ||
357 | pm_runtime_get_sync(dev); | |
358 | sdrv->remove(to_spmi_device(dev)); | |
359 | pm_runtime_put_noidle(dev); | |
360 | ||
361 | pm_runtime_disable(dev); | |
362 | pm_runtime_set_suspended(dev); | |
363 | pm_runtime_put_noidle(dev); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static struct bus_type spmi_bus_type = { | |
368 | .name = "spmi", | |
369 | .match = spmi_device_match, | |
5a86bf34 KH |
370 | .probe = spmi_drv_probe, |
371 | .remove = spmi_drv_remove, | |
372 | }; | |
373 | ||
374 | /** | |
375 | * spmi_controller_alloc() - Allocate a new SPMI device | |
376 | * @ctrl: associated controller | |
377 | * | |
378 | * Caller is responsible for either calling spmi_device_add() to add the | |
379 | * newly allocated controller, or calling spmi_device_put() to discard it. | |
380 | */ | |
381 | struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl) | |
382 | { | |
383 | struct spmi_device *sdev; | |
384 | ||
385 | sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); | |
386 | if (!sdev) | |
387 | return NULL; | |
388 | ||
389 | sdev->ctrl = ctrl; | |
390 | device_initialize(&sdev->dev); | |
391 | sdev->dev.parent = &ctrl->dev; | |
392 | sdev->dev.bus = &spmi_bus_type; | |
393 | sdev->dev.type = &spmi_dev_type; | |
394 | return sdev; | |
395 | } | |
396 | EXPORT_SYMBOL_GPL(spmi_device_alloc); | |
397 | ||
398 | /** | |
399 | * spmi_controller_alloc() - Allocate a new SPMI controller | |
400 | * @parent: parent device | |
401 | * @size: size of private data | |
402 | * | |
403 | * Caller is responsible for either calling spmi_controller_add() to add the | |
404 | * newly allocated controller, or calling spmi_controller_put() to discard it. | |
405 | * The allocated private data region may be accessed via | |
406 | * spmi_controller_get_drvdata() | |
407 | */ | |
408 | struct spmi_controller *spmi_controller_alloc(struct device *parent, | |
409 | size_t size) | |
410 | { | |
411 | struct spmi_controller *ctrl; | |
412 | int id; | |
413 | ||
414 | if (WARN_ON(!parent)) | |
415 | return NULL; | |
416 | ||
417 | ctrl = kzalloc(sizeof(*ctrl) + size, GFP_KERNEL); | |
418 | if (!ctrl) | |
419 | return NULL; | |
420 | ||
421 | device_initialize(&ctrl->dev); | |
422 | ctrl->dev.type = &spmi_ctrl_type; | |
423 | ctrl->dev.bus = &spmi_bus_type; | |
424 | ctrl->dev.parent = parent; | |
425 | ctrl->dev.of_node = parent->of_node; | |
426 | spmi_controller_set_drvdata(ctrl, &ctrl[1]); | |
427 | ||
428 | id = ida_simple_get(&ctrl_ida, 0, 0, GFP_KERNEL); | |
429 | if (id < 0) { | |
430 | dev_err(parent, | |
431 | "unable to allocate SPMI controller identifier.\n"); | |
432 | spmi_controller_put(ctrl); | |
433 | return NULL; | |
434 | } | |
435 | ||
436 | ctrl->nr = id; | |
437 | dev_set_name(&ctrl->dev, "spmi-%d", id); | |
438 | ||
439 | dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n", ctrl, id); | |
440 | return ctrl; | |
441 | } | |
442 | EXPORT_SYMBOL_GPL(spmi_controller_alloc); | |
443 | ||
444 | static void of_spmi_register_devices(struct spmi_controller *ctrl) | |
445 | { | |
446 | struct device_node *node; | |
447 | int err; | |
448 | ||
449 | if (!ctrl->dev.of_node) | |
450 | return; | |
451 | ||
452 | for_each_available_child_of_node(ctrl->dev.of_node, node) { | |
453 | struct spmi_device *sdev; | |
454 | u32 reg[2]; | |
455 | ||
456 | dev_dbg(&ctrl->dev, "adding child %s\n", node->full_name); | |
457 | ||
458 | err = of_property_read_u32_array(node, "reg", reg, 2); | |
459 | if (err) { | |
460 | dev_err(&ctrl->dev, | |
461 | "node %s err (%d) does not have 'reg' property\n", | |
462 | node->full_name, err); | |
463 | continue; | |
464 | } | |
465 | ||
466 | if (reg[1] != SPMI_USID) { | |
467 | dev_err(&ctrl->dev, | |
468 | "node %s contains unsupported 'reg' entry\n", | |
469 | node->full_name); | |
470 | continue; | |
471 | } | |
472 | ||
473 | if (reg[0] >= SPMI_MAX_SLAVE_ID) { | |
474 | dev_err(&ctrl->dev, | |
475 | "invalid usid on node %s\n", | |
476 | node->full_name); | |
477 | continue; | |
478 | } | |
479 | ||
480 | dev_dbg(&ctrl->dev, "read usid %02x\n", reg[0]); | |
481 | ||
482 | sdev = spmi_device_alloc(ctrl); | |
483 | if (!sdev) | |
484 | continue; | |
485 | ||
486 | sdev->dev.of_node = node; | |
487 | sdev->usid = (u8) reg[0]; | |
488 | ||
489 | err = spmi_device_add(sdev); | |
490 | if (err) { | |
491 | dev_err(&sdev->dev, | |
492 | "failure adding device. status %d\n", err); | |
493 | spmi_device_put(sdev); | |
494 | } | |
495 | } | |
496 | } | |
497 | ||
498 | /** | |
499 | * spmi_controller_add() - Add an SPMI controller | |
500 | * @ctrl: controller to be registered. | |
501 | * | |
502 | * Register a controller previously allocated via spmi_controller_alloc() with | |
503 | * the SPMI core. | |
504 | */ | |
505 | int spmi_controller_add(struct spmi_controller *ctrl) | |
506 | { | |
507 | int ret; | |
508 | ||
509 | /* Can't register until after driver model init */ | |
510 | if (WARN_ON(!spmi_bus_type.p)) | |
511 | return -EAGAIN; | |
512 | ||
513 | ret = device_add(&ctrl->dev); | |
514 | if (ret) | |
515 | return ret; | |
516 | ||
517 | if (IS_ENABLED(CONFIG_OF)) | |
518 | of_spmi_register_devices(ctrl); | |
519 | ||
520 | dev_dbg(&ctrl->dev, "spmi-%d registered: dev:%p\n", | |
521 | ctrl->nr, &ctrl->dev); | |
522 | ||
523 | return 0; | |
524 | }; | |
525 | EXPORT_SYMBOL_GPL(spmi_controller_add); | |
526 | ||
527 | /* Remove a device associated with a controller */ | |
528 | static int spmi_ctrl_remove_device(struct device *dev, void *data) | |
529 | { | |
530 | struct spmi_device *spmidev = to_spmi_device(dev); | |
531 | if (dev->type == &spmi_dev_type) | |
532 | spmi_device_remove(spmidev); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | /** | |
537 | * spmi_controller_remove(): remove an SPMI controller | |
538 | * @ctrl: controller to remove | |
539 | * | |
540 | * Remove a SPMI controller. Caller is responsible for calling | |
541 | * spmi_controller_put() to discard the allocated controller. | |
542 | */ | |
543 | void spmi_controller_remove(struct spmi_controller *ctrl) | |
544 | { | |
545 | int dummy; | |
546 | ||
547 | if (!ctrl) | |
548 | return; | |
549 | ||
550 | dummy = device_for_each_child(&ctrl->dev, NULL, | |
551 | spmi_ctrl_remove_device); | |
552 | device_del(&ctrl->dev); | |
553 | } | |
554 | EXPORT_SYMBOL_GPL(spmi_controller_remove); | |
555 | ||
556 | /** | |
557 | * spmi_driver_register() - Register client driver with SPMI core | |
558 | * @sdrv: client driver to be associated with client-device. | |
559 | * | |
560 | * This API will register the client driver with the SPMI framework. | |
561 | * It is typically called from the driver's module-init function. | |
562 | */ | |
ff6f4648 | 563 | int __spmi_driver_register(struct spmi_driver *sdrv, struct module *owner) |
5a86bf34 KH |
564 | { |
565 | sdrv->driver.bus = &spmi_bus_type; | |
ff6f4648 | 566 | sdrv->driver.owner = owner; |
5a86bf34 KH |
567 | return driver_register(&sdrv->driver); |
568 | } | |
ff6f4648 | 569 | EXPORT_SYMBOL_GPL(__spmi_driver_register); |
5a86bf34 KH |
570 | |
571 | static void __exit spmi_exit(void) | |
572 | { | |
573 | bus_unregister(&spmi_bus_type); | |
574 | } | |
575 | module_exit(spmi_exit); | |
576 | ||
577 | static int __init spmi_init(void) | |
578 | { | |
579 | return bus_register(&spmi_bus_type); | |
580 | } | |
581 | postcore_initcall(spmi_init); | |
582 | ||
583 | MODULE_LICENSE("GPL v2"); | |
584 | MODULE_DESCRIPTION("SPMI module"); | |
585 | MODULE_ALIAS("platform:spmi"); |