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  1/*
  2 * HSI core.
  3 *
  4 * Copyright (C) 2010 Nokia Corporation. All rights reserved.
  5 *
  6 * Contact: Carlos Chinea <carlos.chinea@nokia.com>
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License
 10 * version 2 as published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful, but
 13 * WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15 * General Public License for more details.
 16 *
 17 * You should have received a copy of the GNU General Public License
 18 * along with this program; if not, write to the Free Software
 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 20 * 02110-1301 USA
 21 */
 22#include <linux/hsi/hsi.h>
 23#include <linux/compiler.h>
 24#include <linux/list.h>
 25#include <linux/kobject.h>
 26#include <linux/slab.h>
 27#include <linux/string.h>
 28#include <linux/notifier.h>
 29#include <linux/of.h>
 30#include <linux/of_device.h>
 31#include "hsi_core.h"
 32
 33static ssize_t modalias_show(struct device *dev,
 34			struct device_attribute *a __maybe_unused, char *buf)
 35{
 36	return sprintf(buf, "hsi:%s\n", dev_name(dev));
 37}
 38static DEVICE_ATTR_RO(modalias);
 39
 40static struct attribute *hsi_bus_dev_attrs[] = {
 41	&dev_attr_modalias.attr,
 42	NULL,
 43};
 44ATTRIBUTE_GROUPS(hsi_bus_dev);
 45
 46static int hsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 47{
 48	add_uevent_var(env, "MODALIAS=hsi:%s", dev_name(dev));
 49
 50	return 0;
 51}
 52
 53static int hsi_bus_match(struct device *dev, struct device_driver *driver)
 54{
 55	if (of_driver_match_device(dev, driver))
 56		return true;
 57
 58	if (strcmp(dev_name(dev), driver->name) == 0)
 59		return true;
 60
 61	return false;
 62}
 63
 64static struct bus_type hsi_bus_type = {
 65	.name		= "hsi",
 66	.dev_groups	= hsi_bus_dev_groups,
 67	.match		= hsi_bus_match,
 68	.uevent		= hsi_bus_uevent,
 69};
 70
 71static void hsi_client_release(struct device *dev)
 72{
 73	struct hsi_client *cl = to_hsi_client(dev);
 74
 75	kfree(cl->tx_cfg.channels);
 76	kfree(cl->rx_cfg.channels);
 77	kfree(cl);
 78}
 79
 80struct hsi_client *hsi_new_client(struct hsi_port *port,
 81						struct hsi_board_info *info)
 82{
 83	struct hsi_client *cl;
 84	size_t size;
 85
 86	cl = kzalloc(sizeof(*cl), GFP_KERNEL);
 87	if (!cl)
 88		goto err;
 89
 90	cl->tx_cfg = info->tx_cfg;
 91	if (cl->tx_cfg.channels) {
 92		size = cl->tx_cfg.num_channels * sizeof(*cl->tx_cfg.channels);
 93		cl->tx_cfg.channels = kmemdup(info->tx_cfg.channels, size,
 94					      GFP_KERNEL);
 95		if (!cl->tx_cfg.channels)
 96			goto err_tx;
 97	}
 98
 99	cl->rx_cfg = info->rx_cfg;
100	if (cl->rx_cfg.channels) {
101		size = cl->rx_cfg.num_channels * sizeof(*cl->rx_cfg.channels);
102		cl->rx_cfg.channels = kmemdup(info->rx_cfg.channels, size,
103					      GFP_KERNEL);
104		if (!cl->rx_cfg.channels)
105			goto err_rx;
106	}
107
108	cl->device.bus = &hsi_bus_type;
109	cl->device.parent = &port->device;
110	cl->device.release = hsi_client_release;
111	dev_set_name(&cl->device, "%s", info->name);
112	cl->device.platform_data = info->platform_data;
113	if (info->archdata)
114		cl->device.archdata = *info->archdata;
115	if (device_register(&cl->device) < 0) {
116		pr_err("hsi: failed to register client: %s\n", info->name);
117		put_device(&cl->device);
118	}
119
120	return cl;
121err_rx:
122	kfree(cl->tx_cfg.channels);
123err_tx:
124	kfree(cl);
125err:
126	return NULL;
127}
128EXPORT_SYMBOL_GPL(hsi_new_client);
129
130static void hsi_scan_board_info(struct hsi_controller *hsi)
131{
132	struct hsi_cl_info *cl_info;
133	struct hsi_port	*p;
134
135	list_for_each_entry(cl_info, &hsi_board_list, list)
136		if (cl_info->info.hsi_id == hsi->id) {
137			p = hsi_find_port_num(hsi, cl_info->info.port);
138			if (!p)
139				continue;
140			hsi_new_client(p, &cl_info->info);
141		}
142}
143
144#ifdef CONFIG_OF
145static struct hsi_board_info hsi_char_dev_info = {
146	.name = "hsi_char",
147};
148
149static int hsi_of_property_parse_mode(struct device_node *client, char *name,
150				      unsigned int *result)
151{
152	const char *mode;
153	int err;
154
155	err = of_property_read_string(client, name, &mode);
156	if (err < 0)
157		return err;
158
159	if (strcmp(mode, "stream") == 0)
160		*result = HSI_MODE_STREAM;
161	else if (strcmp(mode, "frame") == 0)
162		*result = HSI_MODE_FRAME;
163	else
164		return -EINVAL;
165
166	return 0;
167}
168
169static int hsi_of_property_parse_flow(struct device_node *client, char *name,
170				      unsigned int *result)
171{
172	const char *flow;
173	int err;
174
175	err = of_property_read_string(client, name, &flow);
176	if (err < 0)
177		return err;
178
179	if (strcmp(flow, "synchronized") == 0)
180		*result = HSI_FLOW_SYNC;
181	else if (strcmp(flow, "pipeline") == 0)
182		*result = HSI_FLOW_PIPE;
183	else
184		return -EINVAL;
185
186	return 0;
187}
188
189static int hsi_of_property_parse_arb_mode(struct device_node *client,
190					  char *name, unsigned int *result)
191{
192	const char *arb_mode;
193	int err;
194
195	err = of_property_read_string(client, name, &arb_mode);
196	if (err < 0)
197		return err;
198
199	if (strcmp(arb_mode, "round-robin") == 0)
200		*result = HSI_ARB_RR;
201	else if (strcmp(arb_mode, "priority") == 0)
202		*result = HSI_ARB_PRIO;
203	else
204		return -EINVAL;
205
206	return 0;
207}
208
209static void hsi_add_client_from_dt(struct hsi_port *port,
210						struct device_node *client)
211{
212	struct hsi_client *cl;
213	struct hsi_channel channel;
214	struct property *prop;
215	char name[32];
216	int length, cells, err, i, max_chan, mode;
217
218	cl = kzalloc(sizeof(*cl), GFP_KERNEL);
219	if (!cl)
220		return;
221
222	err = of_modalias_node(client, name, sizeof(name));
223	if (err)
224		goto err;
225
226	dev_set_name(&cl->device, "%s", name);
227
228	err = hsi_of_property_parse_mode(client, "hsi-mode", &mode);
229	if (err) {
230		err = hsi_of_property_parse_mode(client, "hsi-rx-mode",
231						 &cl->rx_cfg.mode);
232		if (err)
233			goto err;
234
235		err = hsi_of_property_parse_mode(client, "hsi-tx-mode",
236						 &cl->tx_cfg.mode);
237		if (err)
238			goto err;
239	} else {
240		cl->rx_cfg.mode = mode;
241		cl->tx_cfg.mode = mode;
242	}
243
244	err = of_property_read_u32(client, "hsi-speed-kbps",
245				   &cl->tx_cfg.speed);
246	if (err)
247		goto err;
248	cl->rx_cfg.speed = cl->tx_cfg.speed;
249
250	err = hsi_of_property_parse_flow(client, "hsi-flow",
251					 &cl->rx_cfg.flow);
252	if (err)
253		goto err;
254
255	err = hsi_of_property_parse_arb_mode(client, "hsi-arb-mode",
256					     &cl->rx_cfg.arb_mode);
257	if (err)
258		goto err;
259
260	prop = of_find_property(client, "hsi-channel-ids", &length);
261	if (!prop) {
262		err = -EINVAL;
263		goto err;
264	}
265
266	cells = length / sizeof(u32);
267
268	cl->rx_cfg.num_channels = cells;
269	cl->tx_cfg.num_channels = cells;
270
271	cl->rx_cfg.channels = kzalloc(cells * sizeof(channel), GFP_KERNEL);
272	if (!cl->rx_cfg.channels) {
273		err = -ENOMEM;
274		goto err;
275	}
276
277	cl->tx_cfg.channels = kzalloc(cells * sizeof(channel), GFP_KERNEL);
278	if (!cl->tx_cfg.channels) {
279		err = -ENOMEM;
280		goto err2;
281	}
282
283	max_chan = 0;
284	for (i = 0; i < cells; i++) {
285		err = of_property_read_u32_index(client, "hsi-channel-ids", i,
286						 &channel.id);
287		if (err)
288			goto err3;
289
290		err = of_property_read_string_index(client, "hsi-channel-names",
291						    i, &channel.name);
292		if (err)
293			channel.name = NULL;
294
295		if (channel.id > max_chan)
296			max_chan = channel.id;
297
298		cl->rx_cfg.channels[i] = channel;
299		cl->tx_cfg.channels[i] = channel;
300	}
301
302	cl->rx_cfg.num_hw_channels = max_chan + 1;
303	cl->tx_cfg.num_hw_channels = max_chan + 1;
304
305	cl->device.bus = &hsi_bus_type;
306	cl->device.parent = &port->device;
307	cl->device.release = hsi_client_release;
308	cl->device.of_node = client;
309
310	if (device_register(&cl->device) < 0) {
311		pr_err("hsi: failed to register client: %s\n", name);
312		put_device(&cl->device);
313	}
314
315	return;
316
317err3:
318	kfree(cl->tx_cfg.channels);
319err2:
320	kfree(cl->rx_cfg.channels);
321err:
322	kfree(cl);
323	pr_err("hsi client: missing or incorrect of property: err=%d\n", err);
324}
325
326void hsi_add_clients_from_dt(struct hsi_port *port, struct device_node *clients)
327{
328	struct device_node *child;
329
330	/* register hsi-char device */
331	hsi_new_client(port, &hsi_char_dev_info);
332
333	for_each_available_child_of_node(clients, child)
334		hsi_add_client_from_dt(port, child);
335}
336EXPORT_SYMBOL_GPL(hsi_add_clients_from_dt);
337#endif
338
339int hsi_remove_client(struct device *dev, void *data __maybe_unused)
340{
341	device_unregister(dev);
342
343	return 0;
344}
345EXPORT_SYMBOL_GPL(hsi_remove_client);
346
347static int hsi_remove_port(struct device *dev, void *data __maybe_unused)
348{
349	device_for_each_child(dev, NULL, hsi_remove_client);
350	device_unregister(dev);
351
352	return 0;
353}
354
355static void hsi_controller_release(struct device *dev)
356{
357	struct hsi_controller *hsi = to_hsi_controller(dev);
358
359	kfree(hsi->port);
360	kfree(hsi);
361}
362
363static void hsi_port_release(struct device *dev)
364{
365	kfree(to_hsi_port(dev));
366}
367
368/**
369 * hsi_unregister_port - Unregister an HSI port
370 * @port: The HSI port to unregister
371 */
372void hsi_port_unregister_clients(struct hsi_port *port)
373{
374	device_for_each_child(&port->device, NULL, hsi_remove_client);
375}
376EXPORT_SYMBOL_GPL(hsi_port_unregister_clients);
377
378/**
379 * hsi_unregister_controller - Unregister an HSI controller
380 * @hsi: The HSI controller to register
381 */
382void hsi_unregister_controller(struct hsi_controller *hsi)
383{
384	device_for_each_child(&hsi->device, NULL, hsi_remove_port);
385	device_unregister(&hsi->device);
386}
387EXPORT_SYMBOL_GPL(hsi_unregister_controller);
388
389/**
390 * hsi_register_controller - Register an HSI controller and its ports
391 * @hsi: The HSI controller to register
392 *
393 * Returns -errno on failure, 0 on success.
394 */
395int hsi_register_controller(struct hsi_controller *hsi)
396{
397	unsigned int i;
398	int err;
399
400	err = device_add(&hsi->device);
401	if (err < 0)
402		return err;
403	for (i = 0; i < hsi->num_ports; i++) {
404		hsi->port[i]->device.parent = &hsi->device;
405		err = device_add(&hsi->port[i]->device);
406		if (err < 0)
407			goto out;
408	}
409	/* Populate HSI bus with HSI clients */
410	hsi_scan_board_info(hsi);
411
412	return 0;
413out:
414	while (i-- > 0)
415		device_del(&hsi->port[i]->device);
416	device_del(&hsi->device);
417
418	return err;
419}
420EXPORT_SYMBOL_GPL(hsi_register_controller);
421
422/**
423 * hsi_register_client_driver - Register an HSI client to the HSI bus
424 * @drv: HSI client driver to register
425 *
426 * Returns -errno on failure, 0 on success.
427 */
428int hsi_register_client_driver(struct hsi_client_driver *drv)
429{
430	drv->driver.bus = &hsi_bus_type;
431
432	return driver_register(&drv->driver);
433}
434EXPORT_SYMBOL_GPL(hsi_register_client_driver);
435
436static inline int hsi_dummy_msg(struct hsi_msg *msg __maybe_unused)
437{
438	return 0;
439}
440
441static inline int hsi_dummy_cl(struct hsi_client *cl __maybe_unused)
442{
443	return 0;
444}
445
446/**
447 * hsi_put_controller - Free an HSI controller
448 *
449 * @hsi: Pointer to the HSI controller to freed
450 *
451 * HSI controller drivers should only use this function if they need
452 * to free their allocated hsi_controller structures before a successful
453 * call to hsi_register_controller. Other use is not allowed.
454 */
455void hsi_put_controller(struct hsi_controller *hsi)
456{
457	unsigned int i;
458
459	if (!hsi)
460		return;
461
462	for (i = 0; i < hsi->num_ports; i++)
463		if (hsi->port && hsi->port[i])
464			put_device(&hsi->port[i]->device);
465	put_device(&hsi->device);
466}
467EXPORT_SYMBOL_GPL(hsi_put_controller);
468
469/**
470 * hsi_alloc_controller - Allocate an HSI controller and its ports
471 * @n_ports: Number of ports on the HSI controller
472 * @flags: Kernel allocation flags
473 *
474 * Return NULL on failure or a pointer to an hsi_controller on success.
475 */
476struct hsi_controller *hsi_alloc_controller(unsigned int n_ports, gfp_t flags)
477{
478	struct hsi_controller	*hsi;
479	struct hsi_port		**port;
480	unsigned int		i;
481
482	if (!n_ports)
483		return NULL;
484
485	hsi = kzalloc(sizeof(*hsi), flags);
486	if (!hsi)
487		return NULL;
488	port = kzalloc(sizeof(*port)*n_ports, flags);
489	if (!port) {
490		kfree(hsi);
491		return NULL;
492	}
493	hsi->num_ports = n_ports;
494	hsi->port = port;
495	hsi->device.release = hsi_controller_release;
496	device_initialize(&hsi->device);
497
498	for (i = 0; i < n_ports; i++) {
499		port[i] = kzalloc(sizeof(**port), flags);
500		if (port[i] == NULL)
501			goto out;
502		port[i]->num = i;
503		port[i]->async = hsi_dummy_msg;
504		port[i]->setup = hsi_dummy_cl;
505		port[i]->flush = hsi_dummy_cl;
506		port[i]->start_tx = hsi_dummy_cl;
507		port[i]->stop_tx = hsi_dummy_cl;
508		port[i]->release = hsi_dummy_cl;
509		mutex_init(&port[i]->lock);
510		BLOCKING_INIT_NOTIFIER_HEAD(&port[i]->n_head);
511		dev_set_name(&port[i]->device, "port%d", i);
512		hsi->port[i]->device.release = hsi_port_release;
513		device_initialize(&hsi->port[i]->device);
514	}
515
516	return hsi;
517out:
518	hsi_put_controller(hsi);
519
520	return NULL;
521}
522EXPORT_SYMBOL_GPL(hsi_alloc_controller);
523
524/**
525 * hsi_free_msg - Free an HSI message
526 * @msg: Pointer to the HSI message
527 *
528 * Client is responsible to free the buffers pointed by the scatterlists.
529 */
530void hsi_free_msg(struct hsi_msg *msg)
531{
532	if (!msg)
533		return;
534	sg_free_table(&msg->sgt);
535	kfree(msg);
536}
537EXPORT_SYMBOL_GPL(hsi_free_msg);
538
539/**
540 * hsi_alloc_msg - Allocate an HSI message
541 * @nents: Number of memory entries
542 * @flags: Kernel allocation flags
543 *
544 * nents can be 0. This mainly makes sense for read transfer.
545 * In that case, HSI drivers will call the complete callback when
546 * there is data to be read without consuming it.
547 *
548 * Return NULL on failure or a pointer to an hsi_msg on success.
549 */
550struct hsi_msg *hsi_alloc_msg(unsigned int nents, gfp_t flags)
551{
552	struct hsi_msg *msg;
553	int err;
554
555	msg = kzalloc(sizeof(*msg), flags);
556	if (!msg)
557		return NULL;
558
559	if (!nents)
560		return msg;
561
562	err = sg_alloc_table(&msg->sgt, nents, flags);
563	if (unlikely(err)) {
564		kfree(msg);
565		msg = NULL;
566	}
567
568	return msg;
569}
570EXPORT_SYMBOL_GPL(hsi_alloc_msg);
571
572/**
573 * hsi_async - Submit an HSI transfer to the controller
574 * @cl: HSI client sending the transfer
575 * @msg: The HSI transfer passed to controller
576 *
577 * The HSI message must have the channel, ttype, complete and destructor
578 * fields set beforehand. If nents > 0 then the client has to initialize
579 * also the scatterlists to point to the buffers to write to or read from.
580 *
581 * HSI controllers relay on pre-allocated buffers from their clients and they
582 * do not allocate buffers on their own.
583 *
584 * Once the HSI message transfer finishes, the HSI controller calls the
585 * complete callback with the status and actual_len fields of the HSI message
586 * updated. The complete callback can be called before returning from
587 * hsi_async.
588 *
589 * Returns -errno on failure or 0 on success
590 */
591int hsi_async(struct hsi_client *cl, struct hsi_msg *msg)
592{
593	struct hsi_port *port = hsi_get_port(cl);
594
595	if (!hsi_port_claimed(cl))
596		return -EACCES;
597
598	WARN_ON_ONCE(!msg->destructor || !msg->complete);
599	msg->cl = cl;
600
601	return port->async(msg);
602}
603EXPORT_SYMBOL_GPL(hsi_async);
604
605/**
606 * hsi_claim_port - Claim the HSI client's port
607 * @cl: HSI client that wants to claim its port
608 * @share: Flag to indicate if the client wants to share the port or not.
609 *
610 * Returns -errno on failure, 0 on success.
611 */
612int hsi_claim_port(struct hsi_client *cl, unsigned int share)
613{
614	struct hsi_port *port = hsi_get_port(cl);
615	int err = 0;
616
617	mutex_lock(&port->lock);
618	if ((port->claimed) && (!port->shared || !share)) {
619		err = -EBUSY;
620		goto out;
621	}
622	if (!try_module_get(to_hsi_controller(port->device.parent)->owner)) {
623		err = -ENODEV;
624		goto out;
625	}
626	port->claimed++;
627	port->shared = !!share;
628	cl->pclaimed = 1;
629out:
630	mutex_unlock(&port->lock);
631
632	return err;
633}
634EXPORT_SYMBOL_GPL(hsi_claim_port);
635
636/**
637 * hsi_release_port - Release the HSI client's port
638 * @cl: HSI client which previously claimed its port
639 */
640void hsi_release_port(struct hsi_client *cl)
641{
642	struct hsi_port *port = hsi_get_port(cl);
643
644	mutex_lock(&port->lock);
645	/* Allow HW driver to do some cleanup */
646	port->release(cl);
647	if (cl->pclaimed)
648		port->claimed--;
649	BUG_ON(port->claimed < 0);
650	cl->pclaimed = 0;
651	if (!port->claimed)
652		port->shared = 0;
653	module_put(to_hsi_controller(port->device.parent)->owner);
654	mutex_unlock(&port->lock);
655}
656EXPORT_SYMBOL_GPL(hsi_release_port);
657
658static int hsi_event_notifier_call(struct notifier_block *nb,
659				unsigned long event, void *data __maybe_unused)
660{
661	struct hsi_client *cl = container_of(nb, struct hsi_client, nb);
662
663	(*cl->ehandler)(cl, event);
664
665	return 0;
666}
667
668/**
669 * hsi_register_port_event - Register a client to receive port events
670 * @cl: HSI client that wants to receive port events
671 * @handler: Event handler callback
672 *
673 * Clients should register a callback to be able to receive
674 * events from the ports. Registration should happen after
675 * claiming the port.
676 * The handler can be called in interrupt context.
677 *
678 * Returns -errno on error, or 0 on success.
679 */
680int hsi_register_port_event(struct hsi_client *cl,
681			void (*handler)(struct hsi_client *, unsigned long))
682{
683	struct hsi_port *port = hsi_get_port(cl);
684
685	if (!handler || cl->ehandler)
686		return -EINVAL;
687	if (!hsi_port_claimed(cl))
688		return -EACCES;
689	cl->ehandler = handler;
690	cl->nb.notifier_call = hsi_event_notifier_call;
691
692	return blocking_notifier_chain_register(&port->n_head, &cl->nb);
693}
694EXPORT_SYMBOL_GPL(hsi_register_port_event);
695
696/**
697 * hsi_unregister_port_event - Stop receiving port events for a client
698 * @cl: HSI client that wants to stop receiving port events
699 *
700 * Clients should call this function before releasing their associated
701 * port.
702 *
703 * Returns -errno on error, or 0 on success.
704 */
705int hsi_unregister_port_event(struct hsi_client *cl)
706{
707	struct hsi_port *port = hsi_get_port(cl);
708	int err;
709
710	WARN_ON(!hsi_port_claimed(cl));
711
712	err = blocking_notifier_chain_unregister(&port->n_head, &cl->nb);
713	if (!err)
714		cl->ehandler = NULL;
715
716	return err;
717}
718EXPORT_SYMBOL_GPL(hsi_unregister_port_event);
719
720/**
721 * hsi_event - Notifies clients about port events
722 * @port: Port where the event occurred
723 * @event: The event type
724 *
725 * Clients should not be concerned about wake line behavior. However, due
726 * to a race condition in HSI HW protocol, clients need to be notified
727 * about wake line changes, so they can implement a workaround for it.
728 *
729 * Events:
730 * HSI_EVENT_START_RX - Incoming wake line high
731 * HSI_EVENT_STOP_RX - Incoming wake line down
732 *
733 * Returns -errno on error, or 0 on success.
734 */
735int hsi_event(struct hsi_port *port, unsigned long event)
736{
737	return blocking_notifier_call_chain(&port->n_head, event, NULL);
738}
739EXPORT_SYMBOL_GPL(hsi_event);
740
741/**
742 * hsi_get_channel_id_by_name - acquire channel id by channel name
743 * @cl: HSI client, which uses the channel
744 * @name: name the channel is known under
745 *
746 * Clients can call this function to get the hsi channel ids similar to
747 * requesting IRQs or GPIOs by name. This function assumes the same
748 * channel configuration is used for RX and TX.
749 *
750 * Returns -errno on error or channel id on success.
751 */
752int hsi_get_channel_id_by_name(struct hsi_client *cl, char *name)
753{
754	int i;
755
756	if (!cl->rx_cfg.channels)
757		return -ENOENT;
758
759	for (i = 0; i < cl->rx_cfg.num_channels; i++)
760		if (!strcmp(cl->rx_cfg.channels[i].name, name))
761			return cl->rx_cfg.channels[i].id;
762
763	return -ENXIO;
764}
765EXPORT_SYMBOL_GPL(hsi_get_channel_id_by_name);
766
767static int __init hsi_init(void)
768{
769	return bus_register(&hsi_bus_type);
770}
771postcore_initcall(hsi_init);
772
773static void __exit hsi_exit(void)
774{
775	bus_unregister(&hsi_bus_type);
776}
777module_exit(hsi_exit);
778
779MODULE_AUTHOR("Carlos Chinea <carlos.chinea@nokia.com>");
780MODULE_DESCRIPTION("High-speed Synchronous Serial Interface (HSI) framework");
781MODULE_LICENSE("GPL v2");