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97fb5e8d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0b9641f5 GA |
2 | /* |
3 | * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. | |
5a86bf34 KH |
4 | */ |
5 | #include <linux/kernel.h> | |
6 | #include <linux/errno.h> | |
7 | #include <linux/idr.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/of.h> | |
11 | #include <linux/of_device.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/spmi.h> | |
5a86bf34 KH |
14 | #include <linux/pm_runtime.h> |
15 | ||
16 | #include <dt-bindings/spmi/spmi.h> | |
a9fce374 AG |
17 | #define CREATE_TRACE_POINTS |
18 | #include <trace/events/spmi.h> | |
5a86bf34 | 19 | |
47f55b74 | 20 | static bool is_registered; |
5a86bf34 KH |
21 | static DEFINE_IDA(ctrl_ida); |
22 | ||
23 | static void spmi_dev_release(struct device *dev) | |
24 | { | |
25 | struct spmi_device *sdev = to_spmi_device(dev); | |
26 | kfree(sdev); | |
27 | } | |
28 | ||
29 | static const struct device_type spmi_dev_type = { | |
30 | .release = spmi_dev_release, | |
31 | }; | |
32 | ||
33 | static void spmi_ctrl_release(struct device *dev) | |
34 | { | |
35 | struct spmi_controller *ctrl = to_spmi_controller(dev); | |
36 | ida_simple_remove(&ctrl_ida, ctrl->nr); | |
37 | kfree(ctrl); | |
38 | } | |
39 | ||
40 | static const struct device_type spmi_ctrl_type = { | |
41 | .release = spmi_ctrl_release, | |
42 | }; | |
43 | ||
5a86bf34 KH |
44 | static int spmi_device_match(struct device *dev, struct device_driver *drv) |
45 | { | |
46 | if (of_driver_match_device(dev, drv)) | |
47 | return 1; | |
48 | ||
49 | if (drv->name) | |
50 | return strncmp(dev_name(dev), drv->name, | |
51 | SPMI_NAME_SIZE) == 0; | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | /** | |
57 | * spmi_device_add() - add a device previously constructed via spmi_device_alloc() | |
58 | * @sdev: spmi_device to be added | |
59 | */ | |
60 | int spmi_device_add(struct spmi_device *sdev) | |
61 | { | |
62 | struct spmi_controller *ctrl = sdev->ctrl; | |
63 | int err; | |
64 | ||
65 | dev_set_name(&sdev->dev, "%d-%02x", ctrl->nr, sdev->usid); | |
66 | ||
67 | err = device_add(&sdev->dev); | |
68 | if (err < 0) { | |
69 | dev_err(&sdev->dev, "Can't add %s, status %d\n", | |
70 | dev_name(&sdev->dev), err); | |
71 | goto err_device_add; | |
72 | } | |
73 | ||
74 | dev_dbg(&sdev->dev, "device %s registered\n", dev_name(&sdev->dev)); | |
75 | ||
76 | err_device_add: | |
77 | return err; | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(spmi_device_add); | |
80 | ||
81 | /** | |
82 | * spmi_device_remove(): remove an SPMI device | |
83 | * @sdev: spmi_device to be removed | |
84 | */ | |
85 | void spmi_device_remove(struct spmi_device *sdev) | |
86 | { | |
87 | device_unregister(&sdev->dev); | |
88 | } | |
89 | EXPORT_SYMBOL_GPL(spmi_device_remove); | |
90 | ||
91 | static inline int | |
92 | spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid) | |
93 | { | |
a9fce374 AG |
94 | int ret; |
95 | ||
5a86bf34 KH |
96 | if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type) |
97 | return -EINVAL; | |
98 | ||
a9fce374 AG |
99 | ret = ctrl->cmd(ctrl, opcode, sid); |
100 | trace_spmi_cmd(opcode, sid, ret); | |
101 | return ret; | |
5a86bf34 KH |
102 | } |
103 | ||
104 | static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode, | |
105 | u8 sid, u16 addr, u8 *buf, size_t len) | |
106 | { | |
a9fce374 AG |
107 | int ret; |
108 | ||
5a86bf34 KH |
109 | if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type) |
110 | return -EINVAL; | |
111 | ||
a9fce374 AG |
112 | trace_spmi_read_begin(opcode, sid, addr); |
113 | ret = ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len); | |
114 | trace_spmi_read_end(opcode, sid, addr, ret, len, buf); | |
115 | return ret; | |
5a86bf34 KH |
116 | } |
117 | ||
118 | static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode, | |
119 | u8 sid, u16 addr, const u8 *buf, size_t len) | |
120 | { | |
a9fce374 AG |
121 | int ret; |
122 | ||
5a86bf34 KH |
123 | if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type) |
124 | return -EINVAL; | |
125 | ||
a9fce374 AG |
126 | trace_spmi_write_begin(opcode, sid, addr, len, buf); |
127 | ret = ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len); | |
128 | trace_spmi_write_end(opcode, sid, addr, ret); | |
129 | return ret; | |
5a86bf34 KH |
130 | } |
131 | ||
132 | /** | |
133 | * spmi_register_read() - register read | |
134 | * @sdev: SPMI device. | |
135 | * @addr: slave register address (5-bit address). | |
136 | * @buf: buffer to be populated with data from the Slave. | |
137 | * | |
138 | * Reads 1 byte of data from a Slave device register. | |
139 | */ | |
140 | int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf) | |
141 | { | |
142 | /* 5-bit register address */ | |
143 | if (addr > 0x1F) | |
144 | return -EINVAL; | |
145 | ||
146 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_READ, sdev->usid, addr, | |
147 | buf, 1); | |
148 | } | |
149 | EXPORT_SYMBOL_GPL(spmi_register_read); | |
150 | ||
151 | /** | |
152 | * spmi_ext_register_read() - extended register read | |
153 | * @sdev: SPMI device. | |
154 | * @addr: slave register address (8-bit address). | |
155 | * @buf: buffer to be populated with data from the Slave. | |
156 | * @len: the request number of bytes to read (up to 16 bytes). | |
157 | * | |
158 | * Reads up to 16 bytes of data from the extended register space on a | |
159 | * Slave device. | |
160 | */ | |
161 | int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf, | |
162 | size_t len) | |
163 | { | |
164 | /* 8-bit register address, up to 16 bytes */ | |
165 | if (len == 0 || len > 16) | |
166 | return -EINVAL; | |
167 | ||
168 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READ, sdev->usid, addr, | |
169 | buf, len); | |
170 | } | |
171 | EXPORT_SYMBOL_GPL(spmi_ext_register_read); | |
172 | ||
173 | /** | |
174 | * spmi_ext_register_readl() - extended register read long | |
175 | * @sdev: SPMI device. | |
176 | * @addr: slave register address (16-bit address). | |
177 | * @buf: buffer to be populated with data from the Slave. | |
178 | * @len: the request number of bytes to read (up to 8 bytes). | |
179 | * | |
180 | * Reads up to 8 bytes of data from the extended register space on a | |
181 | * Slave device using 16-bit address. | |
182 | */ | |
183 | int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf, | |
184 | size_t len) | |
185 | { | |
186 | /* 16-bit register address, up to 8 bytes */ | |
187 | if (len == 0 || len > 8) | |
188 | return -EINVAL; | |
189 | ||
190 | return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READL, sdev->usid, addr, | |
191 | buf, len); | |
192 | } | |
193 | EXPORT_SYMBOL_GPL(spmi_ext_register_readl); | |
194 | ||
195 | /** | |
196 | * spmi_register_write() - register write | |
197 | * @sdev: SPMI device | |
198 | * @addr: slave register address (5-bit address). | |
199 | * @data: buffer containing the data to be transferred to the Slave. | |
200 | * | |
201 | * Writes 1 byte of data to a Slave device register. | |
202 | */ | |
203 | int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data) | |
204 | { | |
205 | /* 5-bit register address */ | |
206 | if (addr > 0x1F) | |
207 | return -EINVAL; | |
208 | ||
209 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_WRITE, sdev->usid, addr, | |
210 | &data, 1); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(spmi_register_write); | |
213 | ||
214 | /** | |
215 | * spmi_register_zero_write() - register zero write | |
216 | * @sdev: SPMI device. | |
217 | * @data: the data to be written to register 0 (7-bits). | |
218 | * | |
219 | * Writes data to register 0 of the Slave device. | |
220 | */ | |
221 | int spmi_register_zero_write(struct spmi_device *sdev, u8 data) | |
222 | { | |
223 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_ZERO_WRITE, sdev->usid, 0, | |
224 | &data, 1); | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(spmi_register_zero_write); | |
227 | ||
228 | /** | |
229 | * spmi_ext_register_write() - extended register write | |
230 | * @sdev: SPMI device. | |
231 | * @addr: slave register address (8-bit address). | |
232 | * @buf: buffer containing the data to be transferred to the Slave. | |
233 | * @len: the request number of bytes to read (up to 16 bytes). | |
234 | * | |
235 | * Writes up to 16 bytes of data to the extended register space of a | |
236 | * Slave device. | |
237 | */ | |
238 | int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf, | |
239 | size_t len) | |
240 | { | |
241 | /* 8-bit register address, up to 16 bytes */ | |
242 | if (len == 0 || len > 16) | |
243 | return -EINVAL; | |
244 | ||
245 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITE, sdev->usid, addr, | |
246 | buf, len); | |
247 | } | |
248 | EXPORT_SYMBOL_GPL(spmi_ext_register_write); | |
249 | ||
250 | /** | |
251 | * spmi_ext_register_writel() - extended register write long | |
252 | * @sdev: SPMI device. | |
253 | * @addr: slave register address (16-bit address). | |
254 | * @buf: buffer containing the data to be transferred to the Slave. | |
255 | * @len: the request number of bytes to read (up to 8 bytes). | |
256 | * | |
257 | * Writes up to 8 bytes of data to the extended register space of a | |
258 | * Slave device using 16-bit address. | |
259 | */ | |
260 | int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf, | |
261 | size_t len) | |
262 | { | |
263 | /* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */ | |
264 | if (len == 0 || len > 8) | |
265 | return -EINVAL; | |
266 | ||
267 | return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITEL, sdev->usid, | |
268 | addr, buf, len); | |
269 | } | |
270 | EXPORT_SYMBOL_GPL(spmi_ext_register_writel); | |
271 | ||
272 | /** | |
273 | * spmi_command_reset() - sends RESET command to the specified slave | |
274 | * @sdev: SPMI device. | |
275 | * | |
276 | * The Reset command initializes the Slave and forces all registers to | |
277 | * their reset values. The Slave shall enter the STARTUP state after | |
278 | * receiving a Reset command. | |
279 | */ | |
280 | int spmi_command_reset(struct spmi_device *sdev) | |
281 | { | |
282 | return spmi_cmd(sdev->ctrl, SPMI_CMD_RESET, sdev->usid); | |
283 | } | |
284 | EXPORT_SYMBOL_GPL(spmi_command_reset); | |
285 | ||
286 | /** | |
287 | * spmi_command_sleep() - sends SLEEP command to the specified SPMI device | |
288 | * @sdev: SPMI device. | |
289 | * | |
290 | * The Sleep command causes the Slave to enter the user defined SLEEP state. | |
291 | */ | |
292 | int spmi_command_sleep(struct spmi_device *sdev) | |
293 | { | |
294 | return spmi_cmd(sdev->ctrl, SPMI_CMD_SLEEP, sdev->usid); | |
295 | } | |
296 | EXPORT_SYMBOL_GPL(spmi_command_sleep); | |
297 | ||
298 | /** | |
299 | * spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device | |
300 | * @sdev: SPMI device. | |
301 | * | |
302 | * The Wakeup command causes the Slave to move from the SLEEP state to | |
303 | * the ACTIVE state. | |
304 | */ | |
305 | int spmi_command_wakeup(struct spmi_device *sdev) | |
306 | { | |
307 | return spmi_cmd(sdev->ctrl, SPMI_CMD_WAKEUP, sdev->usid); | |
308 | } | |
309 | EXPORT_SYMBOL_GPL(spmi_command_wakeup); | |
310 | ||
311 | /** | |
312 | * spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device | |
313 | * @sdev: SPMI device. | |
314 | * | |
315 | * The Shutdown command causes the Slave to enter the SHUTDOWN state. | |
316 | */ | |
317 | int spmi_command_shutdown(struct spmi_device *sdev) | |
318 | { | |
319 | return spmi_cmd(sdev->ctrl, SPMI_CMD_SHUTDOWN, sdev->usid); | |
320 | } | |
321 | EXPORT_SYMBOL_GPL(spmi_command_shutdown); | |
322 | ||
323 | static int spmi_drv_probe(struct device *dev) | |
324 | { | |
325 | const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); | |
326 | struct spmi_device *sdev = to_spmi_device(dev); | |
327 | int err; | |
328 | ||
5a86bf34 KH |
329 | pm_runtime_get_noresume(dev); |
330 | pm_runtime_set_active(dev); | |
331 | pm_runtime_enable(dev); | |
332 | ||
333 | err = sdrv->probe(sdev); | |
334 | if (err) | |
335 | goto fail_probe; | |
336 | ||
337 | return 0; | |
338 | ||
339 | fail_probe: | |
340 | pm_runtime_disable(dev); | |
341 | pm_runtime_set_suspended(dev); | |
342 | pm_runtime_put_noidle(dev); | |
5a86bf34 KH |
343 | return err; |
344 | } | |
345 | ||
346 | static int spmi_drv_remove(struct device *dev) | |
347 | { | |
348 | const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); | |
349 | ||
350 | pm_runtime_get_sync(dev); | |
351 | sdrv->remove(to_spmi_device(dev)); | |
352 | pm_runtime_put_noidle(dev); | |
353 | ||
354 | pm_runtime_disable(dev); | |
355 | pm_runtime_set_suspended(dev); | |
356 | pm_runtime_put_noidle(dev); | |
357 | return 0; | |
358 | } | |
359 | ||
d50daa2a BA |
360 | static int spmi_drv_uevent(struct device *dev, struct kobj_uevent_env *env) |
361 | { | |
362 | int ret; | |
363 | ||
364 | ret = of_device_uevent_modalias(dev, env); | |
365 | if (ret != -ENODEV) | |
366 | return ret; | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
5a86bf34 KH |
371 | static struct bus_type spmi_bus_type = { |
372 | .name = "spmi", | |
373 | .match = spmi_device_match, | |
5a86bf34 KH |
374 | .probe = spmi_drv_probe, |
375 | .remove = spmi_drv_remove, | |
d50daa2a | 376 | .uevent = spmi_drv_uevent, |
5a86bf34 KH |
377 | }; |
378 | ||
379 | /** | |
380 | * spmi_controller_alloc() - Allocate a new SPMI device | |
381 | * @ctrl: associated controller | |
382 | * | |
383 | * Caller is responsible for either calling spmi_device_add() to add the | |
384 | * newly allocated controller, or calling spmi_device_put() to discard it. | |
385 | */ | |
386 | struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl) | |
387 | { | |
388 | struct spmi_device *sdev; | |
389 | ||
390 | sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); | |
391 | if (!sdev) | |
392 | return NULL; | |
393 | ||
394 | sdev->ctrl = ctrl; | |
395 | device_initialize(&sdev->dev); | |
396 | sdev->dev.parent = &ctrl->dev; | |
397 | sdev->dev.bus = &spmi_bus_type; | |
398 | sdev->dev.type = &spmi_dev_type; | |
399 | return sdev; | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(spmi_device_alloc); | |
402 | ||
403 | /** | |
404 | * spmi_controller_alloc() - Allocate a new SPMI controller | |
405 | * @parent: parent device | |
406 | * @size: size of private data | |
407 | * | |
408 | * Caller is responsible for either calling spmi_controller_add() to add the | |
409 | * newly allocated controller, or calling spmi_controller_put() to discard it. | |
410 | * The allocated private data region may be accessed via | |
411 | * spmi_controller_get_drvdata() | |
412 | */ | |
413 | struct spmi_controller *spmi_controller_alloc(struct device *parent, | |
414 | size_t size) | |
415 | { | |
416 | struct spmi_controller *ctrl; | |
417 | int id; | |
418 | ||
419 | if (WARN_ON(!parent)) | |
420 | return NULL; | |
421 | ||
422 | ctrl = kzalloc(sizeof(*ctrl) + size, GFP_KERNEL); | |
423 | if (!ctrl) | |
424 | return NULL; | |
425 | ||
426 | device_initialize(&ctrl->dev); | |
427 | ctrl->dev.type = &spmi_ctrl_type; | |
428 | ctrl->dev.bus = &spmi_bus_type; | |
429 | ctrl->dev.parent = parent; | |
430 | ctrl->dev.of_node = parent->of_node; | |
431 | spmi_controller_set_drvdata(ctrl, &ctrl[1]); | |
432 | ||
433 | id = ida_simple_get(&ctrl_ida, 0, 0, GFP_KERNEL); | |
434 | if (id < 0) { | |
435 | dev_err(parent, | |
436 | "unable to allocate SPMI controller identifier.\n"); | |
437 | spmi_controller_put(ctrl); | |
438 | return NULL; | |
439 | } | |
440 | ||
441 | ctrl->nr = id; | |
442 | dev_set_name(&ctrl->dev, "spmi-%d", id); | |
443 | ||
444 | dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n", ctrl, id); | |
445 | return ctrl; | |
446 | } | |
447 | EXPORT_SYMBOL_GPL(spmi_controller_alloc); | |
448 | ||
449 | static void of_spmi_register_devices(struct spmi_controller *ctrl) | |
450 | { | |
451 | struct device_node *node; | |
452 | int err; | |
453 | ||
454 | if (!ctrl->dev.of_node) | |
455 | return; | |
456 | ||
457 | for_each_available_child_of_node(ctrl->dev.of_node, node) { | |
458 | struct spmi_device *sdev; | |
459 | u32 reg[2]; | |
460 | ||
e55fe64a | 461 | dev_dbg(&ctrl->dev, "adding child %pOF\n", node); |
5a86bf34 KH |
462 | |
463 | err = of_property_read_u32_array(node, "reg", reg, 2); | |
464 | if (err) { | |
465 | dev_err(&ctrl->dev, | |
e55fe64a RH |
466 | "node %pOF err (%d) does not have 'reg' property\n", |
467 | node, err); | |
5a86bf34 KH |
468 | continue; |
469 | } | |
470 | ||
471 | if (reg[1] != SPMI_USID) { | |
472 | dev_err(&ctrl->dev, | |
e55fe64a RH |
473 | "node %pOF contains unsupported 'reg' entry\n", |
474 | node); | |
5a86bf34 KH |
475 | continue; |
476 | } | |
477 | ||
478 | if (reg[0] >= SPMI_MAX_SLAVE_ID) { | |
e55fe64a | 479 | dev_err(&ctrl->dev, "invalid usid on node %pOF\n", node); |
5a86bf34 KH |
480 | continue; |
481 | } | |
482 | ||
483 | dev_dbg(&ctrl->dev, "read usid %02x\n", reg[0]); | |
484 | ||
485 | sdev = spmi_device_alloc(ctrl); | |
486 | if (!sdev) | |
487 | continue; | |
488 | ||
489 | sdev->dev.of_node = node; | |
490 | sdev->usid = (u8) reg[0]; | |
491 | ||
492 | err = spmi_device_add(sdev); | |
493 | if (err) { | |
494 | dev_err(&sdev->dev, | |
495 | "failure adding device. status %d\n", err); | |
496 | spmi_device_put(sdev); | |
497 | } | |
498 | } | |
499 | } | |
500 | ||
501 | /** | |
502 | * spmi_controller_add() - Add an SPMI controller | |
503 | * @ctrl: controller to be registered. | |
504 | * | |
505 | * Register a controller previously allocated via spmi_controller_alloc() with | |
506 | * the SPMI core. | |
507 | */ | |
508 | int spmi_controller_add(struct spmi_controller *ctrl) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | /* Can't register until after driver model init */ | |
47f55b74 | 513 | if (WARN_ON(!is_registered)) |
5a86bf34 KH |
514 | return -EAGAIN; |
515 | ||
516 | ret = device_add(&ctrl->dev); | |
517 | if (ret) | |
518 | return ret; | |
519 | ||
520 | if (IS_ENABLED(CONFIG_OF)) | |
521 | of_spmi_register_devices(ctrl); | |
522 | ||
523 | dev_dbg(&ctrl->dev, "spmi-%d registered: dev:%p\n", | |
524 | ctrl->nr, &ctrl->dev); | |
525 | ||
526 | return 0; | |
527 | }; | |
528 | EXPORT_SYMBOL_GPL(spmi_controller_add); | |
529 | ||
530 | /* Remove a device associated with a controller */ | |
531 | static int spmi_ctrl_remove_device(struct device *dev, void *data) | |
532 | { | |
533 | struct spmi_device *spmidev = to_spmi_device(dev); | |
534 | if (dev->type == &spmi_dev_type) | |
535 | spmi_device_remove(spmidev); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /** | |
540 | * spmi_controller_remove(): remove an SPMI controller | |
541 | * @ctrl: controller to remove | |
542 | * | |
543 | * Remove a SPMI controller. Caller is responsible for calling | |
544 | * spmi_controller_put() to discard the allocated controller. | |
545 | */ | |
546 | void spmi_controller_remove(struct spmi_controller *ctrl) | |
547 | { | |
548 | int dummy; | |
549 | ||
550 | if (!ctrl) | |
551 | return; | |
552 | ||
553 | dummy = device_for_each_child(&ctrl->dev, NULL, | |
554 | spmi_ctrl_remove_device); | |
555 | device_del(&ctrl->dev); | |
556 | } | |
557 | EXPORT_SYMBOL_GPL(spmi_controller_remove); | |
558 | ||
559 | /** | |
560 | * spmi_driver_register() - Register client driver with SPMI core | |
561 | * @sdrv: client driver to be associated with client-device. | |
562 | * | |
563 | * This API will register the client driver with the SPMI framework. | |
564 | * It is typically called from the driver's module-init function. | |
565 | */ | |
ff6f4648 | 566 | int __spmi_driver_register(struct spmi_driver *sdrv, struct module *owner) |
5a86bf34 KH |
567 | { |
568 | sdrv->driver.bus = &spmi_bus_type; | |
ff6f4648 | 569 | sdrv->driver.owner = owner; |
5a86bf34 KH |
570 | return driver_register(&sdrv->driver); |
571 | } | |
ff6f4648 | 572 | EXPORT_SYMBOL_GPL(__spmi_driver_register); |
5a86bf34 KH |
573 | |
574 | static void __exit spmi_exit(void) | |
575 | { | |
576 | bus_unregister(&spmi_bus_type); | |
577 | } | |
578 | module_exit(spmi_exit); | |
579 | ||
580 | static int __init spmi_init(void) | |
581 | { | |
47f55b74 SM |
582 | int ret; |
583 | ||
584 | ret = bus_register(&spmi_bus_type); | |
585 | if (ret) | |
586 | return ret; | |
587 | ||
588 | is_registered = true; | |
589 | return 0; | |
5a86bf34 KH |
590 | } |
591 | postcore_initcall(spmi_init); | |
592 | ||
593 | MODULE_LICENSE("GPL v2"); | |
594 | MODULE_DESCRIPTION("SPMI module"); | |
595 | MODULE_ALIAS("platform:spmi"); |