1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. |
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> |
14 | #include <linux/pm_runtime.h> |
15 | |
16 | #include <dt-bindings/spmi/spmi.h> |
17 | #define CREATE_TRACE_POINTS |
18 | #include <trace/events/spmi.h> |
19 | |
20 | static bool is_registered; |
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(d: dev); |
26 | |
27 | kfree(objp: sdev); |
28 | } |
29 | |
30 | static const struct device_type spmi_dev_type = { |
31 | .release = spmi_dev_release, |
32 | }; |
33 | |
34 | static void spmi_ctrl_release(struct device *dev) |
35 | { |
36 | struct spmi_controller *ctrl = to_spmi_controller(d: dev); |
37 | |
38 | ida_free(&ctrl_ida, id: ctrl->nr); |
39 | kfree(objp: ctrl); |
40 | } |
41 | |
42 | static const struct device_type spmi_ctrl_type = { |
43 | .release = spmi_ctrl_release, |
44 | }; |
45 | |
46 | static int spmi_device_match(struct device *dev, struct device_driver *drv) |
47 | { |
48 | if (of_driver_match_device(dev, drv)) |
49 | return 1; |
50 | |
51 | if (drv->name) |
52 | return strncmp(dev_name(dev), drv->name, |
53 | SPMI_NAME_SIZE) == 0; |
54 | |
55 | return 0; |
56 | } |
57 | |
58 | /** |
59 | * spmi_device_add() - add a device previously constructed via spmi_device_alloc() |
60 | * @sdev: spmi_device to be added |
61 | */ |
62 | int spmi_device_add(struct spmi_device *sdev) |
63 | { |
64 | struct spmi_controller *ctrl = sdev->ctrl; |
65 | int err; |
66 | |
67 | dev_set_name(dev: &sdev->dev, name: "%d-%02x" , ctrl->nr, sdev->usid); |
68 | |
69 | err = device_add(dev: &sdev->dev); |
70 | if (err < 0) { |
71 | dev_err(&sdev->dev, "Can't add %s, status %d\n" , |
72 | dev_name(&sdev->dev), err); |
73 | goto err_device_add; |
74 | } |
75 | |
76 | dev_dbg(&sdev->dev, "device %s registered\n" , dev_name(&sdev->dev)); |
77 | |
78 | err_device_add: |
79 | return err; |
80 | } |
81 | EXPORT_SYMBOL_GPL(spmi_device_add); |
82 | |
83 | /** |
84 | * spmi_device_remove(): remove an SPMI device |
85 | * @sdev: spmi_device to be removed |
86 | */ |
87 | void spmi_device_remove(struct spmi_device *sdev) |
88 | { |
89 | device_unregister(dev: &sdev->dev); |
90 | } |
91 | EXPORT_SYMBOL_GPL(spmi_device_remove); |
92 | |
93 | static inline int |
94 | spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid) |
95 | { |
96 | int ret; |
97 | |
98 | if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type) |
99 | return -EINVAL; |
100 | |
101 | ret = ctrl->cmd(ctrl, opcode, sid); |
102 | trace_spmi_cmd(opcode, sid, ret); |
103 | return ret; |
104 | } |
105 | |
106 | static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode, |
107 | u8 sid, u16 addr, u8 *buf, size_t len) |
108 | { |
109 | int ret; |
110 | |
111 | if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type) |
112 | return -EINVAL; |
113 | |
114 | trace_spmi_read_begin(opcode, sid, addr); |
115 | ret = ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len); |
116 | trace_spmi_read_end(opcode, sid, addr, ret, len, buf); |
117 | return ret; |
118 | } |
119 | |
120 | static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode, |
121 | u8 sid, u16 addr, const u8 *buf, size_t len) |
122 | { |
123 | int ret; |
124 | |
125 | if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type) |
126 | return -EINVAL; |
127 | |
128 | trace_spmi_write_begin(opcode, sid, addr, len, buf); |
129 | ret = ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len); |
130 | trace_spmi_write_end(opcode, sid, addr, ret); |
131 | return ret; |
132 | } |
133 | |
134 | /** |
135 | * spmi_register_read() - register read |
136 | * @sdev: SPMI device. |
137 | * @addr: slave register address (5-bit address). |
138 | * @buf: buffer to be populated with data from the Slave. |
139 | * |
140 | * Reads 1 byte of data from a Slave device register. |
141 | */ |
142 | int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf) |
143 | { |
144 | /* 5-bit register address */ |
145 | if (addr > 0x1F) |
146 | return -EINVAL; |
147 | |
148 | return spmi_read_cmd(ctrl: sdev->ctrl, SPMI_CMD_READ, sid: sdev->usid, addr, |
149 | buf, len: 1); |
150 | } |
151 | EXPORT_SYMBOL_GPL(spmi_register_read); |
152 | |
153 | /** |
154 | * spmi_ext_register_read() - extended register read |
155 | * @sdev: SPMI device. |
156 | * @addr: slave register address (8-bit address). |
157 | * @buf: buffer to be populated with data from the Slave. |
158 | * @len: the request number of bytes to read (up to 16 bytes). |
159 | * |
160 | * Reads up to 16 bytes of data from the extended register space on a |
161 | * Slave device. |
162 | */ |
163 | int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf, |
164 | size_t len) |
165 | { |
166 | /* 8-bit register address, up to 16 bytes */ |
167 | if (len == 0 || len > 16) |
168 | return -EINVAL; |
169 | |
170 | return spmi_read_cmd(ctrl: sdev->ctrl, SPMI_CMD_EXT_READ, sid: sdev->usid, addr, |
171 | buf, len); |
172 | } |
173 | EXPORT_SYMBOL_GPL(spmi_ext_register_read); |
174 | |
175 | /** |
176 | * spmi_ext_register_readl() - extended register read long |
177 | * @sdev: SPMI device. |
178 | * @addr: slave register address (16-bit address). |
179 | * @buf: buffer to be populated with data from the Slave. |
180 | * @len: the request number of bytes to read (up to 8 bytes). |
181 | * |
182 | * Reads up to 8 bytes of data from the extended register space on a |
183 | * Slave device using 16-bit address. |
184 | */ |
185 | int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf, |
186 | size_t len) |
187 | { |
188 | /* 16-bit register address, up to 8 bytes */ |
189 | if (len == 0 || len > 8) |
190 | return -EINVAL; |
191 | |
192 | return spmi_read_cmd(ctrl: sdev->ctrl, SPMI_CMD_EXT_READL, sid: sdev->usid, addr, |
193 | buf, len); |
194 | } |
195 | EXPORT_SYMBOL_GPL(spmi_ext_register_readl); |
196 | |
197 | /** |
198 | * spmi_register_write() - register write |
199 | * @sdev: SPMI device |
200 | * @addr: slave register address (5-bit address). |
201 | * @data: buffer containing the data to be transferred to the Slave. |
202 | * |
203 | * Writes 1 byte of data to a Slave device register. |
204 | */ |
205 | int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data) |
206 | { |
207 | /* 5-bit register address */ |
208 | if (addr > 0x1F) |
209 | return -EINVAL; |
210 | |
211 | return spmi_write_cmd(ctrl: sdev->ctrl, SPMI_CMD_WRITE, sid: sdev->usid, addr, |
212 | buf: &data, len: 1); |
213 | } |
214 | EXPORT_SYMBOL_GPL(spmi_register_write); |
215 | |
216 | /** |
217 | * spmi_register_zero_write() - register zero write |
218 | * @sdev: SPMI device. |
219 | * @data: the data to be written to register 0 (7-bits). |
220 | * |
221 | * Writes data to register 0 of the Slave device. |
222 | */ |
223 | int spmi_register_zero_write(struct spmi_device *sdev, u8 data) |
224 | { |
225 | return spmi_write_cmd(ctrl: sdev->ctrl, SPMI_CMD_ZERO_WRITE, sid: sdev->usid, addr: 0, |
226 | buf: &data, len: 1); |
227 | } |
228 | EXPORT_SYMBOL_GPL(spmi_register_zero_write); |
229 | |
230 | /** |
231 | * spmi_ext_register_write() - extended register write |
232 | * @sdev: SPMI device. |
233 | * @addr: slave register address (8-bit address). |
234 | * @buf: buffer containing the data to be transferred to the Slave. |
235 | * @len: the request number of bytes to read (up to 16 bytes). |
236 | * |
237 | * Writes up to 16 bytes of data to the extended register space of a |
238 | * Slave device. |
239 | */ |
240 | int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf, |
241 | size_t len) |
242 | { |
243 | /* 8-bit register address, up to 16 bytes */ |
244 | if (len == 0 || len > 16) |
245 | return -EINVAL; |
246 | |
247 | return spmi_write_cmd(ctrl: sdev->ctrl, SPMI_CMD_EXT_WRITE, sid: sdev->usid, addr, |
248 | buf, len); |
249 | } |
250 | EXPORT_SYMBOL_GPL(spmi_ext_register_write); |
251 | |
252 | /** |
253 | * spmi_ext_register_writel() - extended register write long |
254 | * @sdev: SPMI device. |
255 | * @addr: slave register address (16-bit address). |
256 | * @buf: buffer containing the data to be transferred to the Slave. |
257 | * @len: the request number of bytes to read (up to 8 bytes). |
258 | * |
259 | * Writes up to 8 bytes of data to the extended register space of a |
260 | * Slave device using 16-bit address. |
261 | */ |
262 | int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf, |
263 | size_t len) |
264 | { |
265 | /* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */ |
266 | if (len == 0 || len > 8) |
267 | return -EINVAL; |
268 | |
269 | return spmi_write_cmd(ctrl: sdev->ctrl, SPMI_CMD_EXT_WRITEL, sid: sdev->usid, |
270 | addr, buf, len); |
271 | } |
272 | EXPORT_SYMBOL_GPL(spmi_ext_register_writel); |
273 | |
274 | /** |
275 | * spmi_command_reset() - sends RESET command to the specified slave |
276 | * @sdev: SPMI device. |
277 | * |
278 | * The Reset command initializes the Slave and forces all registers to |
279 | * their reset values. The Slave shall enter the STARTUP state after |
280 | * receiving a Reset command. |
281 | */ |
282 | int spmi_command_reset(struct spmi_device *sdev) |
283 | { |
284 | return spmi_cmd(ctrl: sdev->ctrl, SPMI_CMD_RESET, sid: sdev->usid); |
285 | } |
286 | EXPORT_SYMBOL_GPL(spmi_command_reset); |
287 | |
288 | /** |
289 | * spmi_command_sleep() - sends SLEEP command to the specified SPMI device |
290 | * @sdev: SPMI device. |
291 | * |
292 | * The Sleep command causes the Slave to enter the user defined SLEEP state. |
293 | */ |
294 | int spmi_command_sleep(struct spmi_device *sdev) |
295 | { |
296 | return spmi_cmd(ctrl: sdev->ctrl, SPMI_CMD_SLEEP, sid: sdev->usid); |
297 | } |
298 | EXPORT_SYMBOL_GPL(spmi_command_sleep); |
299 | |
300 | /** |
301 | * spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device |
302 | * @sdev: SPMI device. |
303 | * |
304 | * The Wakeup command causes the Slave to move from the SLEEP state to |
305 | * the ACTIVE state. |
306 | */ |
307 | int spmi_command_wakeup(struct spmi_device *sdev) |
308 | { |
309 | return spmi_cmd(ctrl: sdev->ctrl, SPMI_CMD_WAKEUP, sid: sdev->usid); |
310 | } |
311 | EXPORT_SYMBOL_GPL(spmi_command_wakeup); |
312 | |
313 | /** |
314 | * spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device |
315 | * @sdev: SPMI device. |
316 | * |
317 | * The Shutdown command causes the Slave to enter the SHUTDOWN state. |
318 | */ |
319 | int spmi_command_shutdown(struct spmi_device *sdev) |
320 | { |
321 | return spmi_cmd(ctrl: sdev->ctrl, SPMI_CMD_SHUTDOWN, sid: sdev->usid); |
322 | } |
323 | EXPORT_SYMBOL_GPL(spmi_command_shutdown); |
324 | |
325 | static int spmi_drv_probe(struct device *dev) |
326 | { |
327 | const struct spmi_driver *sdrv = to_spmi_driver(d: dev->driver); |
328 | struct spmi_device *sdev = to_spmi_device(d: dev); |
329 | int err; |
330 | |
331 | pm_runtime_get_noresume(dev); |
332 | pm_runtime_set_active(dev); |
333 | pm_runtime_enable(dev); |
334 | |
335 | err = sdrv->probe(sdev); |
336 | if (err) |
337 | goto fail_probe; |
338 | |
339 | return 0; |
340 | |
341 | fail_probe: |
342 | pm_runtime_disable(dev); |
343 | pm_runtime_set_suspended(dev); |
344 | pm_runtime_put_noidle(dev); |
345 | return err; |
346 | } |
347 | |
348 | static void spmi_drv_remove(struct device *dev) |
349 | { |
350 | const struct spmi_driver *sdrv = to_spmi_driver(d: dev->driver); |
351 | |
352 | pm_runtime_get_sync(dev); |
353 | if (sdrv->remove) |
354 | sdrv->remove(to_spmi_device(d: dev)); |
355 | pm_runtime_put_noidle(dev); |
356 | |
357 | pm_runtime_disable(dev); |
358 | pm_runtime_set_suspended(dev); |
359 | pm_runtime_put_noidle(dev); |
360 | } |
361 | |
362 | static void spmi_drv_shutdown(struct device *dev) |
363 | { |
364 | const struct spmi_driver *sdrv = to_spmi_driver(d: dev->driver); |
365 | |
366 | if (sdrv && sdrv->shutdown) |
367 | sdrv->shutdown(to_spmi_device(d: dev)); |
368 | } |
369 | |
370 | static int spmi_drv_uevent(const struct device *dev, struct kobj_uevent_env *env) |
371 | { |
372 | int ret; |
373 | |
374 | ret = of_device_uevent_modalias(dev, env); |
375 | if (ret != -ENODEV) |
376 | return ret; |
377 | |
378 | return 0; |
379 | } |
380 | |
381 | static struct bus_type spmi_bus_type = { |
382 | .name = "spmi" , |
383 | .match = spmi_device_match, |
384 | .probe = spmi_drv_probe, |
385 | .remove = spmi_drv_remove, |
386 | .shutdown = spmi_drv_shutdown, |
387 | .uevent = spmi_drv_uevent, |
388 | }; |
389 | |
390 | /** |
391 | * spmi_find_device_by_of_node() - look up an SPMI device from a device node |
392 | * |
393 | * @np: device node |
394 | * |
395 | * Takes a reference to the embedded struct device which needs to be dropped |
396 | * after use. |
397 | * |
398 | * Returns the struct spmi_device associated with a device node or NULL. |
399 | */ |
400 | struct spmi_device *spmi_find_device_by_of_node(struct device_node *np) |
401 | { |
402 | struct device *dev = bus_find_device_by_of_node(bus: &spmi_bus_type, np); |
403 | |
404 | if (dev) |
405 | return to_spmi_device(d: dev); |
406 | return NULL; |
407 | } |
408 | EXPORT_SYMBOL_GPL(spmi_find_device_by_of_node); |
409 | |
410 | /** |
411 | * spmi_device_alloc() - Allocate a new SPMI device |
412 | * @ctrl: associated controller |
413 | * |
414 | * Caller is responsible for either calling spmi_device_add() to add the |
415 | * newly allocated controller, or calling spmi_device_put() to discard it. |
416 | */ |
417 | struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl) |
418 | { |
419 | struct spmi_device *sdev; |
420 | |
421 | sdev = kzalloc(size: sizeof(*sdev), GFP_KERNEL); |
422 | if (!sdev) |
423 | return NULL; |
424 | |
425 | sdev->ctrl = ctrl; |
426 | device_initialize(dev: &sdev->dev); |
427 | sdev->dev.parent = &ctrl->dev; |
428 | sdev->dev.bus = &spmi_bus_type; |
429 | sdev->dev.type = &spmi_dev_type; |
430 | return sdev; |
431 | } |
432 | EXPORT_SYMBOL_GPL(spmi_device_alloc); |
433 | |
434 | /** |
435 | * spmi_controller_alloc() - Allocate a new SPMI controller |
436 | * @parent: parent device |
437 | * @size: size of private data |
438 | * |
439 | * Caller is responsible for either calling spmi_controller_add() to add the |
440 | * newly allocated controller, or calling spmi_controller_put() to discard it. |
441 | * The allocated private data region may be accessed via |
442 | * spmi_controller_get_drvdata() |
443 | */ |
444 | struct spmi_controller *spmi_controller_alloc(struct device *parent, |
445 | size_t size) |
446 | { |
447 | struct spmi_controller *ctrl; |
448 | int id; |
449 | |
450 | if (WARN_ON(!parent)) |
451 | return ERR_PTR(error: -EINVAL); |
452 | |
453 | ctrl = kzalloc(size: sizeof(*ctrl) + size, GFP_KERNEL); |
454 | if (!ctrl) |
455 | return ERR_PTR(error: -ENOMEM); |
456 | |
457 | device_initialize(dev: &ctrl->dev); |
458 | ctrl->dev.type = &spmi_ctrl_type; |
459 | ctrl->dev.bus = &spmi_bus_type; |
460 | ctrl->dev.parent = parent; |
461 | ctrl->dev.of_node = parent->of_node; |
462 | spmi_controller_set_drvdata(ctrl, data: &ctrl[1]); |
463 | |
464 | id = ida_alloc(ida: &ctrl_ida, GFP_KERNEL); |
465 | if (id < 0) { |
466 | dev_err(parent, |
467 | "unable to allocate SPMI controller identifier.\n" ); |
468 | spmi_controller_put(ctrl); |
469 | return ERR_PTR(error: id); |
470 | } |
471 | |
472 | ctrl->nr = id; |
473 | dev_set_name(dev: &ctrl->dev, name: "spmi-%d" , id); |
474 | |
475 | dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n" , ctrl, id); |
476 | return ctrl; |
477 | } |
478 | EXPORT_SYMBOL_GPL(spmi_controller_alloc); |
479 | |
480 | static void of_spmi_register_devices(struct spmi_controller *ctrl) |
481 | { |
482 | struct device_node *node; |
483 | int err; |
484 | |
485 | if (!ctrl->dev.of_node) |
486 | return; |
487 | |
488 | for_each_available_child_of_node(ctrl->dev.of_node, node) { |
489 | struct spmi_device *sdev; |
490 | u32 reg[2]; |
491 | |
492 | dev_dbg(&ctrl->dev, "adding child %pOF\n" , node); |
493 | |
494 | err = of_property_read_u32_array(np: node, propname: "reg" , out_values: reg, sz: 2); |
495 | if (err) { |
496 | dev_err(&ctrl->dev, |
497 | "node %pOF err (%d) does not have 'reg' property\n" , |
498 | node, err); |
499 | continue; |
500 | } |
501 | |
502 | if (reg[1] != SPMI_USID) { |
503 | dev_err(&ctrl->dev, |
504 | "node %pOF contains unsupported 'reg' entry\n" , |
505 | node); |
506 | continue; |
507 | } |
508 | |
509 | if (reg[0] >= SPMI_MAX_SLAVE_ID) { |
510 | dev_err(&ctrl->dev, "invalid usid on node %pOF\n" , node); |
511 | continue; |
512 | } |
513 | |
514 | dev_dbg(&ctrl->dev, "read usid %02x\n" , reg[0]); |
515 | |
516 | sdev = spmi_device_alloc(ctrl); |
517 | if (!sdev) |
518 | continue; |
519 | |
520 | sdev->dev.of_node = node; |
521 | sdev->usid = (u8)reg[0]; |
522 | |
523 | err = spmi_device_add(sdev); |
524 | if (err) { |
525 | dev_err(&sdev->dev, |
526 | "failure adding device. status %d\n" , err); |
527 | spmi_device_put(sdev); |
528 | } |
529 | } |
530 | } |
531 | |
532 | /** |
533 | * spmi_controller_add() - Add an SPMI controller |
534 | * @ctrl: controller to be registered. |
535 | * |
536 | * Register a controller previously allocated via spmi_controller_alloc() with |
537 | * the SPMI core. |
538 | */ |
539 | int spmi_controller_add(struct spmi_controller *ctrl) |
540 | { |
541 | int ret; |
542 | |
543 | /* Can't register until after driver model init */ |
544 | if (WARN_ON(!is_registered)) |
545 | return -EAGAIN; |
546 | |
547 | ret = device_add(dev: &ctrl->dev); |
548 | if (ret) |
549 | return ret; |
550 | |
551 | if (IS_ENABLED(CONFIG_OF)) |
552 | of_spmi_register_devices(ctrl); |
553 | |
554 | dev_dbg(&ctrl->dev, "spmi-%d registered: dev:%p\n" , |
555 | ctrl->nr, &ctrl->dev); |
556 | |
557 | return 0; |
558 | }; |
559 | EXPORT_SYMBOL_GPL(spmi_controller_add); |
560 | |
561 | /* Remove a device associated with a controller */ |
562 | static int spmi_ctrl_remove_device(struct device *dev, void *data) |
563 | { |
564 | struct spmi_device *spmidev = to_spmi_device(d: dev); |
565 | |
566 | if (dev->type == &spmi_dev_type) |
567 | spmi_device_remove(spmidev); |
568 | return 0; |
569 | } |
570 | |
571 | /** |
572 | * spmi_controller_remove(): remove an SPMI controller |
573 | * @ctrl: controller to remove |
574 | * |
575 | * Remove a SPMI controller. Caller is responsible for calling |
576 | * spmi_controller_put() to discard the allocated controller. |
577 | */ |
578 | void spmi_controller_remove(struct spmi_controller *ctrl) |
579 | { |
580 | if (!ctrl) |
581 | return; |
582 | |
583 | device_for_each_child(dev: &ctrl->dev, NULL, fn: spmi_ctrl_remove_device); |
584 | device_del(dev: &ctrl->dev); |
585 | } |
586 | EXPORT_SYMBOL_GPL(spmi_controller_remove); |
587 | |
588 | /** |
589 | * __spmi_driver_register() - Register client driver with SPMI core |
590 | * @sdrv: client driver to be associated with client-device. |
591 | * @owner: module owner |
592 | * |
593 | * This API will register the client driver with the SPMI framework. |
594 | * It is typically called from the driver's module-init function. |
595 | */ |
596 | int __spmi_driver_register(struct spmi_driver *sdrv, struct module *owner) |
597 | { |
598 | sdrv->driver.bus = &spmi_bus_type; |
599 | sdrv->driver.owner = owner; |
600 | return driver_register(drv: &sdrv->driver); |
601 | } |
602 | EXPORT_SYMBOL_GPL(__spmi_driver_register); |
603 | |
604 | static void __exit spmi_exit(void) |
605 | { |
606 | bus_unregister(bus: &spmi_bus_type); |
607 | } |
608 | module_exit(spmi_exit); |
609 | |
610 | static int __init spmi_init(void) |
611 | { |
612 | int ret; |
613 | |
614 | ret = bus_register(bus: &spmi_bus_type); |
615 | if (ret) |
616 | return ret; |
617 | |
618 | is_registered = true; |
619 | return 0; |
620 | } |
621 | postcore_initcall(spmi_init); |
622 | |
623 | MODULE_LICENSE("GPL v2" ); |
624 | MODULE_DESCRIPTION("SPMI module" ); |
625 | MODULE_ALIAS("platform:spmi" ); |
626 | |