1/* OMAP SSI driver.
2 *
3 * Copyright (C) 2010 Nokia Corporation. All rights reserved.
4 * Copyright (C) 2014 Sebastian Reichel <sre@kernel.org>
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
23#include <linux/compiler.h>
24#include <linux/err.h>
25#include <linux/ioport.h>
26#include <linux/io.h>
27#include <linux/gpio.h>
28#include <linux/clk.h>
29#include <linux/device.h>
30#include <linux/platform_device.h>
31#include <linux/dma-mapping.h>
32#include <linux/dmaengine.h>
33#include <linux/delay.h>
34#include <linux/seq_file.h>
35#include <linux/scatterlist.h>
36#include <linux/interrupt.h>
37#include <linux/spinlock.h>
38#include <linux/debugfs.h>
39#include <linux/pm_runtime.h>
40#include <linux/of_platform.h>
41#include <linux/hsi/hsi.h>
42#include <linux/idr.h>
43
44#include "omap_ssi_regs.h"
45#include "omap_ssi.h"
46
47/* For automatically allocated device IDs */
48static DEFINE_IDA(platform_omap_ssi_ida);
49
50#ifdef CONFIG_DEBUG_FS
51static int ssi_debug_show(struct seq_file *m, void *p __maybe_unused)
52{
53	struct hsi_controller *ssi = m->private;
54	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
55	void __iomem *sys = omap_ssi->sys;
56
57	pm_runtime_get_sync(ssi->device.parent);
58	seq_printf(m, "REVISION\t: 0x%08x\n",  readl(sys + SSI_REVISION_REG));
59	seq_printf(m, "SYSCONFIG\t: 0x%08x\n", readl(sys + SSI_SYSCONFIG_REG));
60	seq_printf(m, "SYSSTATUS\t: 0x%08x\n", readl(sys + SSI_SYSSTATUS_REG));
61	pm_runtime_put_sync(ssi->device.parent);
62
63	return 0;
64}
65
66static int ssi_debug_gdd_show(struct seq_file *m, void *p __maybe_unused)
67{
68	struct hsi_controller *ssi = m->private;
69	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
70	void __iomem *gdd = omap_ssi->gdd;
71	void __iomem *sys = omap_ssi->sys;
72	int lch;
73
74	pm_runtime_get_sync(ssi->device.parent);
75
76	seq_printf(m, "GDD_MPU_STATUS\t: 0x%08x\n",
77		readl(sys + SSI_GDD_MPU_IRQ_STATUS_REG));
78	seq_printf(m, "GDD_MPU_ENABLE\t: 0x%08x\n\n",
79		readl(sys + SSI_GDD_MPU_IRQ_ENABLE_REG));
80	seq_printf(m, "HW_ID\t\t: 0x%08x\n",
81				readl(gdd + SSI_GDD_HW_ID_REG));
82	seq_printf(m, "PPORT_ID\t: 0x%08x\n",
83				readl(gdd + SSI_GDD_PPORT_ID_REG));
84	seq_printf(m, "MPORT_ID\t: 0x%08x\n",
85				readl(gdd + SSI_GDD_MPORT_ID_REG));
86	seq_printf(m, "TEST\t\t: 0x%08x\n",
87				readl(gdd + SSI_GDD_TEST_REG));
88	seq_printf(m, "GCR\t\t: 0x%08x\n",
89				readl(gdd + SSI_GDD_GCR_REG));
90
91	for (lch = 0; lch < SSI_MAX_GDD_LCH; lch++) {
92		seq_printf(m, "\nGDD LCH %d\n=========\n", lch);
93		seq_printf(m, "CSDP\t\t: 0x%04x\n",
94				readw(gdd + SSI_GDD_CSDP_REG(lch)));
95		seq_printf(m, "CCR\t\t: 0x%04x\n",
96				readw(gdd + SSI_GDD_CCR_REG(lch)));
97		seq_printf(m, "CICR\t\t: 0x%04x\n",
98				readw(gdd + SSI_GDD_CICR_REG(lch)));
99		seq_printf(m, "CSR\t\t: 0x%04x\n",
100				readw(gdd + SSI_GDD_CSR_REG(lch)));
101		seq_printf(m, "CSSA\t\t: 0x%08x\n",
102				readl(gdd + SSI_GDD_CSSA_REG(lch)));
103		seq_printf(m, "CDSA\t\t: 0x%08x\n",
104				readl(gdd + SSI_GDD_CDSA_REG(lch)));
105		seq_printf(m, "CEN\t\t: 0x%04x\n",
106				readw(gdd + SSI_GDD_CEN_REG(lch)));
107		seq_printf(m, "CSAC\t\t: 0x%04x\n",
108				readw(gdd + SSI_GDD_CSAC_REG(lch)));
109		seq_printf(m, "CDAC\t\t: 0x%04x\n",
110				readw(gdd + SSI_GDD_CDAC_REG(lch)));
111		seq_printf(m, "CLNK_CTRL\t: 0x%04x\n",
112				readw(gdd + SSI_GDD_CLNK_CTRL_REG(lch)));
113	}
114
115	pm_runtime_put_sync(ssi->device.parent);
116
117	return 0;
118}
119
120static int ssi_regs_open(struct inode *inode, struct file *file)
121{
122	return single_open(file, ssi_debug_show, inode->i_private);
123}
124
125static int ssi_gdd_regs_open(struct inode *inode, struct file *file)
126{
127	return single_open(file, ssi_debug_gdd_show, inode->i_private);
128}
129
130static const struct file_operations ssi_regs_fops = {
131	.open		= ssi_regs_open,
132	.read		= seq_read,
133	.llseek		= seq_lseek,
134	.release	= single_release,
135};
136
137static const struct file_operations ssi_gdd_regs_fops = {
138	.open		= ssi_gdd_regs_open,
139	.read		= seq_read,
140	.llseek		= seq_lseek,
141	.release	= single_release,
142};
143
144static int __init ssi_debug_add_ctrl(struct hsi_controller *ssi)
145{
146	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
147	struct dentry *dir;
148
149	/* SSI controller */
150	omap_ssi->dir = debugfs_create_dir(dev_name(&ssi->device), NULL);
151	if (!omap_ssi->dir)
152		return -ENOMEM;
153
154	debugfs_create_file("regs", S_IRUGO, omap_ssi->dir, ssi,
155								&ssi_regs_fops);
156	/* SSI GDD (DMA) */
157	dir = debugfs_create_dir("gdd", omap_ssi->dir);
158	if (!dir)
159		goto rback;
160	debugfs_create_file("regs", S_IRUGO, dir, ssi, &ssi_gdd_regs_fops);
161
162	return 0;
163rback:
164	debugfs_remove_recursive(omap_ssi->dir);
165
166	return -ENOMEM;
167}
168
169static void ssi_debug_remove_ctrl(struct hsi_controller *ssi)
170{
171	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
172
173	debugfs_remove_recursive(omap_ssi->dir);
174}
175#endif /* CONFIG_DEBUG_FS */
176
177/*
178 * FIXME: Horrible HACK needed until we remove the useless wakeline test
179 * in the CMT. To be removed !!!!
180 */
181void ssi_waketest(struct hsi_client *cl, unsigned int enable)
182{
183	struct hsi_port *port = hsi_get_port(cl);
184	struct omap_ssi_port *omap_port = hsi_port_drvdata(port);
185	struct hsi_controller *ssi = to_hsi_controller(port->device.parent);
186	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
187
188	omap_port->wktest = !!enable;
189	if (omap_port->wktest) {
190		pm_runtime_get_sync(ssi->device.parent);
191		writel_relaxed(SSI_WAKE(0),
192				omap_ssi->sys + SSI_SET_WAKE_REG(port->num));
193	} else {
194		writel_relaxed(SSI_WAKE(0),
195				omap_ssi->sys +	SSI_CLEAR_WAKE_REG(port->num));
196		pm_runtime_put_sync(ssi->device.parent);
197	}
198}
199EXPORT_SYMBOL_GPL(ssi_waketest);
200
201static void ssi_gdd_complete(struct hsi_controller *ssi, unsigned int lch)
202{
203	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
204	struct hsi_msg *msg = omap_ssi->gdd_trn[lch].msg;
205	struct hsi_port *port = to_hsi_port(msg->cl->device.parent);
206	struct omap_ssi_port *omap_port = hsi_port_drvdata(port);
207	unsigned int dir;
208	u32 csr;
209	u32 val;
210
211	spin_lock(&omap_ssi->lock);
212
213	val = readl(omap_ssi->sys + SSI_GDD_MPU_IRQ_ENABLE_REG);
214	val &= ~SSI_GDD_LCH(lch);
215	writel_relaxed(val, omap_ssi->sys + SSI_GDD_MPU_IRQ_ENABLE_REG);
216
217	if (msg->ttype == HSI_MSG_READ) {
218		dir = DMA_FROM_DEVICE;
219		val = SSI_DATAAVAILABLE(msg->channel);
220		pm_runtime_put_sync(ssi->device.parent);
221	} else {
222		dir = DMA_TO_DEVICE;
223		val = SSI_DATAACCEPT(msg->channel);
224		/* Keep clocks reference for write pio event */
225	}
226	dma_unmap_sg(&ssi->device, msg->sgt.sgl, msg->sgt.nents, dir);
227	csr = readw(omap_ssi->gdd + SSI_GDD_CSR_REG(lch));
228	omap_ssi->gdd_trn[lch].msg = NULL; /* release GDD lch */
229	dev_dbg(&port->device, "DMA completed ch %d ttype %d\n",
230				msg->channel, msg->ttype);
231	spin_unlock(&omap_ssi->lock);
232	if (csr & SSI_CSR_TOUR) { /* Timeout error */
233		msg->status = HSI_STATUS_ERROR;
234		msg->actual_len = 0;
235		spin_lock(&omap_port->lock);
236		list_del(&msg->link); /* Dequeue msg */
237		spin_unlock(&omap_port->lock);
238		msg->complete(msg);
239		return;
240	}
241	spin_lock(&omap_port->lock);
242	val |= readl(omap_ssi->sys + SSI_MPU_ENABLE_REG(port->num, 0));
243	writel_relaxed(val, omap_ssi->sys + SSI_MPU_ENABLE_REG(port->num, 0));
244	spin_unlock(&omap_port->lock);
245
246	msg->status = HSI_STATUS_COMPLETED;
247	msg->actual_len = sg_dma_len(msg->sgt.sgl);
248}
249
250static void ssi_gdd_tasklet(unsigned long dev)
251{
252	struct hsi_controller *ssi = (struct hsi_controller *)dev;
253	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
254	void __iomem *sys = omap_ssi->sys;
255	unsigned int lch;
256	u32 status_reg;
257
258	pm_runtime_get_sync(ssi->device.parent);
259
260	status_reg = readl(sys + SSI_GDD_MPU_IRQ_STATUS_REG);
261	for (lch = 0; lch < SSI_MAX_GDD_LCH; lch++) {
262		if (status_reg & SSI_GDD_LCH(lch))
263			ssi_gdd_complete(ssi, lch);
264	}
265	writel_relaxed(status_reg, sys + SSI_GDD_MPU_IRQ_STATUS_REG);
266	status_reg = readl(sys + SSI_GDD_MPU_IRQ_STATUS_REG);
267
268	pm_runtime_put_sync(ssi->device.parent);
269
270	if (status_reg)
271		tasklet_hi_schedule(&omap_ssi->gdd_tasklet);
272	else
273		enable_irq(omap_ssi->gdd_irq);
274
275}
276
277static irqreturn_t ssi_gdd_isr(int irq, void *ssi)
278{
279	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
280
281	tasklet_hi_schedule(&omap_ssi->gdd_tasklet);
282	disable_irq_nosync(irq);
283
284	return IRQ_HANDLED;
285}
286
287static unsigned long ssi_get_clk_rate(struct hsi_controller *ssi)
288{
289	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
290	unsigned long rate = clk_get_rate(omap_ssi->fck);
291	return rate;
292}
293
294static int __init ssi_get_iomem(struct platform_device *pd,
295		const char *name, void __iomem **pbase, dma_addr_t *phy)
296{
297	struct resource *mem;
298	struct resource *ioarea;
299	void __iomem *base;
300	struct hsi_controller *ssi = platform_get_drvdata(pd);
301
302	mem = platform_get_resource_byname(pd, IORESOURCE_MEM, name);
303	if (!mem) {
304		dev_err(&pd->dev, "IO memory region missing (%s)\n", name);
305		return -ENXIO;
306	}
307	ioarea = devm_request_mem_region(&ssi->device, mem->start,
308					resource_size(mem), dev_name(&pd->dev));
309	if (!ioarea) {
310		dev_err(&pd->dev, "%s IO memory region request failed\n",
311								mem->name);
312		return -ENXIO;
313	}
314	base = devm_ioremap(&ssi->device, mem->start, resource_size(mem));
315	if (!base) {
316		dev_err(&pd->dev, "%s IO remap failed\n", mem->name);
317		return -ENXIO;
318	}
319	*pbase = base;
320
321	if (phy)
322		*phy = mem->start;
323
324	return 0;
325}
326
327static int __init ssi_add_controller(struct hsi_controller *ssi,
328						struct platform_device *pd)
329{
330	struct omap_ssi_controller *omap_ssi;
331	int err;
332
333	omap_ssi = devm_kzalloc(&ssi->device, sizeof(*omap_ssi), GFP_KERNEL);
334	if (!omap_ssi) {
335		dev_err(&pd->dev, "not enough memory for omap ssi\n");
336		return -ENOMEM;
337	}
338
339	ssi->id = ida_simple_get(&platform_omap_ssi_ida, 0, 0, GFP_KERNEL);
340	if (ssi->id < 0) {
341		err = ssi->id;
342		goto out_err;
343	}
344
345	ssi->owner = THIS_MODULE;
346	ssi->device.parent = &pd->dev;
347	dev_set_name(&ssi->device, "ssi%d", ssi->id);
348	hsi_controller_set_drvdata(ssi, omap_ssi);
349	omap_ssi->dev = &ssi->device;
350	err = ssi_get_iomem(pd, "sys", &omap_ssi->sys, NULL);
351	if (err < 0)
352		goto out_err;
353	err = ssi_get_iomem(pd, "gdd", &omap_ssi->gdd, NULL);
354	if (err < 0)
355		goto out_err;
356	err = platform_get_irq_byname(pd, "gdd_mpu");
357	if (err < 0) {
358		dev_err(&pd->dev, "GDD IRQ resource missing\n");
359		goto out_err;
360	}
361	omap_ssi->gdd_irq = err;
362	tasklet_init(&omap_ssi->gdd_tasklet, ssi_gdd_tasklet,
363							(unsigned long)ssi);
364	err = devm_request_irq(&ssi->device, omap_ssi->gdd_irq, ssi_gdd_isr,
365						0, "gdd_mpu", ssi);
366	if (err < 0) {
367		dev_err(&ssi->device, "Request GDD IRQ %d failed (%d)",
368							omap_ssi->gdd_irq, err);
369		goto out_err;
370	}
371
372	omap_ssi->port = devm_kzalloc(&ssi->device,
373		sizeof(struct omap_ssi_port *) * ssi->num_ports, GFP_KERNEL);
374	if (!omap_ssi->port) {
375		err = -ENOMEM;
376		goto out_err;
377	}
378
379	omap_ssi->fck = devm_clk_get(&ssi->device, "ssi_ssr_fck");
380	if (IS_ERR(omap_ssi->fck)) {
381		dev_err(&pd->dev, "Could not acquire clock \"ssi_ssr_fck\": %li\n",
382			PTR_ERR(omap_ssi->fck));
383		err = -ENODEV;
384		goto out_err;
385	}
386
387	/* TODO: find register, which can be used to detect context loss */
388	omap_ssi->get_loss = NULL;
389
390	omap_ssi->max_speed = UINT_MAX;
391	spin_lock_init(&omap_ssi->lock);
392	err = hsi_register_controller(ssi);
393
394	if (err < 0)
395		goto out_err;
396
397	return 0;
398
399out_err:
400	ida_simple_remove(&platform_omap_ssi_ida, ssi->id);
401	return err;
402}
403
404static int __init ssi_hw_init(struct hsi_controller *ssi)
405{
406	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
407	unsigned int i;
408	u32 val;
409	int err;
410
411	err = pm_runtime_get_sync(ssi->device.parent);
412	if (err < 0) {
413		dev_err(&ssi->device, "runtime PM failed %d\n", err);
414		return err;
415	}
416	/* Reseting SSI controller */
417	writel_relaxed(SSI_SOFTRESET, omap_ssi->sys + SSI_SYSCONFIG_REG);
418	val = readl(omap_ssi->sys + SSI_SYSSTATUS_REG);
419	for (i = 0; ((i < 20) && !(val & SSI_RESETDONE)); i++) {
420		msleep(20);
421		val = readl(omap_ssi->sys + SSI_SYSSTATUS_REG);
422	}
423	if (!(val & SSI_RESETDONE)) {
424		dev_err(&ssi->device, "SSI HW reset failed\n");
425		pm_runtime_put_sync(ssi->device.parent);
426		return -EIO;
427	}
428	/* Reseting GDD */
429	writel_relaxed(SSI_SWRESET, omap_ssi->gdd + SSI_GDD_GRST_REG);
430	/* Get FCK rate in KHz */
431	omap_ssi->fck_rate = DIV_ROUND_CLOSEST(ssi_get_clk_rate(ssi), 1000);
432	dev_dbg(&ssi->device, "SSI fck rate %lu KHz\n", omap_ssi->fck_rate);
433	/* Set default PM settings */
434	val = SSI_AUTOIDLE | SSI_SIDLEMODE_SMART | SSI_MIDLEMODE_SMART;
435	writel_relaxed(val, omap_ssi->sys + SSI_SYSCONFIG_REG);
436	omap_ssi->sysconfig = val;
437	writel_relaxed(SSI_CLK_AUTOGATING_ON, omap_ssi->sys + SSI_GDD_GCR_REG);
438	omap_ssi->gdd_gcr = SSI_CLK_AUTOGATING_ON;
439	pm_runtime_put_sync(ssi->device.parent);
440
441	return 0;
442}
443
444static void ssi_remove_controller(struct hsi_controller *ssi)
445{
446	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
447	int id = ssi->id;
448	tasklet_kill(&omap_ssi->gdd_tasklet);
449	hsi_unregister_controller(ssi);
450	ida_simple_remove(&platform_omap_ssi_ida, id);
451}
452
453static inline int ssi_of_get_available_ports_count(const struct device_node *np)
454{
455	struct device_node *child;
456	int num = 0;
457
458	for_each_available_child_of_node(np, child)
459		if (of_device_is_compatible(child, "ti,omap3-ssi-port"))
460			num++;
461
462	return num;
463}
464
465static int ssi_remove_ports(struct device *dev, void *c)
466{
467	struct platform_device *pdev = to_platform_device(dev);
468
469	of_device_unregister(pdev);
470
471	return 0;
472}
473
474static int __init ssi_probe(struct platform_device *pd)
475{
476	struct platform_device *childpdev;
477	struct device_node *np = pd->dev.of_node;
478	struct device_node *child;
479	struct hsi_controller *ssi;
480	int err;
481	int num_ports;
482
483	if (!np) {
484		dev_err(&pd->dev, "missing device tree data\n");
485		return -EINVAL;
486	}
487
488	num_ports = ssi_of_get_available_ports_count(np);
489
490	ssi = hsi_alloc_controller(num_ports, GFP_KERNEL);
491	if (!ssi) {
492		dev_err(&pd->dev, "No memory for controller\n");
493		return -ENOMEM;
494	}
495
496	platform_set_drvdata(pd, ssi);
497
498	err = ssi_add_controller(ssi, pd);
499	if (err < 0)
500		goto out1;
501
502	pm_runtime_irq_safe(&pd->dev);
503	pm_runtime_enable(&pd->dev);
504
505	err = ssi_hw_init(ssi);
506	if (err < 0)
507		goto out2;
508#ifdef CONFIG_DEBUG_FS
509	err = ssi_debug_add_ctrl(ssi);
510	if (err < 0)
511		goto out2;
512#endif
513
514	for_each_available_child_of_node(np, child) {
515		if (!of_device_is_compatible(child, "ti,omap3-ssi-port"))
516			continue;
517
518		childpdev = of_platform_device_create(child, NULL, &pd->dev);
519		if (!childpdev) {
520			err = -ENODEV;
521			dev_err(&pd->dev, "failed to create ssi controller port\n");
522			goto out3;
523		}
524	}
525
526	dev_info(&pd->dev, "ssi controller %d initialized (%d ports)!\n",
527		ssi->id, num_ports);
528	return err;
529out3:
530	device_for_each_child(&pd->dev, NULL, ssi_remove_ports);
531out2:
532	ssi_remove_controller(ssi);
533out1:
534	platform_set_drvdata(pd, NULL);
535	pm_runtime_disable(&pd->dev);
536
537	return err;
538}
539
540static int __exit ssi_remove(struct platform_device *pd)
541{
542	struct hsi_controller *ssi = platform_get_drvdata(pd);
543
544#ifdef CONFIG_DEBUG_FS
545	ssi_debug_remove_ctrl(ssi);
546#endif
547	ssi_remove_controller(ssi);
548	platform_set_drvdata(pd, NULL);
549
550	pm_runtime_disable(&pd->dev);
551
552	/* cleanup of of_platform_populate() call */
553	device_for_each_child(&pd->dev, NULL, ssi_remove_ports);
554
555	return 0;
556}
557
558#ifdef CONFIG_PM
559static int omap_ssi_runtime_suspend(struct device *dev)
560{
561	struct hsi_controller *ssi = dev_get_drvdata(dev);
562	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
563
564	dev_dbg(dev, "runtime suspend!\n");
565
566	if (omap_ssi->get_loss)
567		omap_ssi->loss_count =
568				omap_ssi->get_loss(ssi->device.parent);
569
570	return 0;
571}
572
573static int omap_ssi_runtime_resume(struct device *dev)
574{
575	struct hsi_controller *ssi = dev_get_drvdata(dev);
576	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
577
578	dev_dbg(dev, "runtime resume!\n");
579
580	if ((omap_ssi->get_loss) && (omap_ssi->loss_count ==
581				omap_ssi->get_loss(ssi->device.parent)))
582		return 0;
583
584	writel_relaxed(omap_ssi->gdd_gcr, omap_ssi->gdd + SSI_GDD_GCR_REG);
585
586	return 0;
587}
588
589static const struct dev_pm_ops omap_ssi_pm_ops = {
590	SET_RUNTIME_PM_OPS(omap_ssi_runtime_suspend, omap_ssi_runtime_resume,
591		NULL)
592};
593
594#define DEV_PM_OPS     (&omap_ssi_pm_ops)
595#else
596#define DEV_PM_OPS     NULL
597#endif
598
599#ifdef CONFIG_OF
600static const struct of_device_id omap_ssi_of_match[] = {
601	{ .compatible = "ti,omap3-ssi", },
602	{},
603};
604MODULE_DEVICE_TABLE(of, omap_ssi_of_match);
605#else
606#define omap_ssi_of_match NULL
607#endif
608
609static struct platform_driver ssi_pdriver = {
610	.remove	= __exit_p(ssi_remove),
611	.driver	= {
612		.name	= "omap_ssi",
613		.pm     = DEV_PM_OPS,
614		.of_match_table = omap_ssi_of_match,
615	},
616};
617
618module_platform_driver_probe(ssi_pdriver, ssi_probe);
619
620MODULE_ALIAS("platform:omap_ssi");
621MODULE_AUTHOR("Carlos Chinea <carlos.chinea@nokia.com>");
622MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
623MODULE_DESCRIPTION("Synchronous Serial Interface Driver");
624MODULE_LICENSE("GPL v2");
625