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17#include <linux/module.h>
18#include <linux/mod_devicetable.h>
19#include <linux/interrupt.h>
20#include <linux/clk.h>
21#include <linux/io.h>
22#include <linux/debugfs.h>
23#include <linux/delay.h>
24#include <linux/slab.h>
25#include <linux/pm_runtime.h>
26#include <linux/power/smartreflex.h>
27
28#define DRIVER_NAME "smartreflex"
29#define SMARTREFLEX_NAME_LEN 32
30#define NVALUE_NAME_LEN 40
31#define SR_DISABLE_TIMEOUT 200
32
33
34static LIST_HEAD(sr_list);
35
36static struct omap_sr_class_data *sr_class;
37static struct dentry *sr_dbg_dir;
38
39static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value)
40{
41 __raw_writel(value, (sr->base + offset));
42}
43
44static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
45 u32 value)
46{
47 u32 reg_val;
48
49
50
51
52
53
54
55
56
57
58 if (sr->ip_type == SR_TYPE_V1 && offset == ERRCONFIG_V1)
59 mask |= ERRCONFIG_STATUS_V1_MASK;
60 else if (sr->ip_type == SR_TYPE_V2 && offset == ERRCONFIG_V2)
61 mask |= ERRCONFIG_VPBOUNDINTST_V2;
62
63 reg_val = __raw_readl(sr->base + offset);
64 reg_val &= ~mask;
65
66 value &= mask;
67
68 reg_val |= value;
69
70 __raw_writel(reg_val, (sr->base + offset));
71}
72
73static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset)
74{
75 return __raw_readl(sr->base + offset);
76}
77
78static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
79{
80 struct omap_sr *sr_info;
81
82 if (!voltdm) {
83 pr_err("%s: Null voltage domain passed!\n", __func__);
84 return ERR_PTR(-EINVAL);
85 }
86
87 list_for_each_entry(sr_info, &sr_list, node) {
88 if (voltdm == sr_info->voltdm)
89 return sr_info;
90 }
91
92 return ERR_PTR(-ENODATA);
93}
94
95static irqreturn_t sr_interrupt(int irq, void *data)
96{
97 struct omap_sr *sr_info = data;
98 u32 status = 0;
99
100 switch (sr_info->ip_type) {
101 case SR_TYPE_V1:
102
103 status = sr_read_reg(sr_info, ERRCONFIG_V1);
104
105
106 sr_write_reg(sr_info, ERRCONFIG_V1, status);
107 break;
108 case SR_TYPE_V2:
109
110 status = sr_read_reg(sr_info, IRQSTATUS);
111
112
113 sr_write_reg(sr_info, IRQSTATUS, status);
114 break;
115 default:
116 dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n",
117 sr_info->ip_type);
118 return IRQ_NONE;
119 }
120
121 if (sr_class->notify)
122 sr_class->notify(sr_info, status);
123
124 return IRQ_HANDLED;
125}
126
127static void sr_set_clk_length(struct omap_sr *sr)
128{
129 u32 fclk_speed;
130
131
132 if (IS_ERR(sr->fck))
133 return;
134
135 fclk_speed = clk_get_rate(sr->fck);
136
137 switch (fclk_speed) {
138 case 12000000:
139 sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK;
140 break;
141 case 13000000:
142 sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK;
143 break;
144 case 19200000:
145 sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK;
146 break;
147 case 26000000:
148 sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK;
149 break;
150 case 38400000:
151 sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK;
152 break;
153 default:
154 dev_err(&sr->pdev->dev, "%s: Invalid fclk rate: %d\n",
155 __func__, fclk_speed);
156 break;
157 }
158}
159
160static void sr_start_vddautocomp(struct omap_sr *sr)
161{
162 if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
163 dev_warn(&sr->pdev->dev,
164 "%s: smartreflex class driver not registered\n",
165 __func__);
166 return;
167 }
168
169 if (!sr_class->enable(sr))
170 sr->autocomp_active = true;
171}
172
173static void sr_stop_vddautocomp(struct omap_sr *sr)
174{
175 if (!sr_class || !(sr_class->disable)) {
176 dev_warn(&sr->pdev->dev,
177 "%s: smartreflex class driver not registered\n",
178 __func__);
179 return;
180 }
181
182 if (sr->autocomp_active) {
183 sr_class->disable(sr, 1);
184 sr->autocomp_active = false;
185 }
186}
187
188
189
190
191
192
193
194
195
196
197
198
199static int sr_late_init(struct omap_sr *sr_info)
200{
201 struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data;
202 int ret = 0;
203
204 if (sr_class->notify && sr_class->notify_flags && sr_info->irq) {
205 ret = devm_request_irq(&sr_info->pdev->dev, sr_info->irq,
206 sr_interrupt, 0, sr_info->name, sr_info);
207 if (ret)
208 goto error;
209 disable_irq(sr_info->irq);
210 }
211
212 if (pdata && pdata->enable_on_init)
213 sr_start_vddautocomp(sr_info);
214
215 return ret;
216
217error:
218 list_del(&sr_info->node);
219 dev_err(&sr_info->pdev->dev, "%s: ERROR in registering interrupt handler. Smartreflex will not function as desired\n",
220 __func__);
221
222 return ret;
223}
224
225static void sr_v1_disable(struct omap_sr *sr)
226{
227 int timeout = 0;
228 int errconf_val = ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
229 ERRCONFIG_MCUBOUNDINTST;
230
231
232 sr_modify_reg(sr, ERRCONFIG_V1,
233 ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN);
234
235
236 sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
237
238
239 if (sr_read_reg(sr, ERRCONFIG_V1) & ERRCONFIG_VPBOUNDINTST_V1)
240 errconf_val |= ERRCONFIG_VPBOUNDINTST_V1;
241 sr_modify_reg(sr, ERRCONFIG_V1,
242 (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
243 ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1),
244 errconf_val);
245
246
247
248
249
250 sr_test_cond_timeout((sr_read_reg(sr, ERRCONFIG_V1) &
251 ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT,
252 timeout);
253
254 if (timeout >= SR_DISABLE_TIMEOUT)
255 dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
256 __func__);
257
258
259 sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN,
260 ERRCONFIG_MCUDISACKINTST);
261}
262
263static void sr_v2_disable(struct omap_sr *sr)
264{
265 int timeout = 0;
266
267
268 sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT);
269
270
271 sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
272
273
274
275
276
277
278 if (sr_read_reg(sr, ERRCONFIG_V2) & ERRCONFIG_VPBOUNDINTST_V2)
279 sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
280 ERRCONFIG_VPBOUNDINTST_V2);
281 else
282 sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
283 0x0);
284 sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT |
285 IRQENABLE_MCUVALIDINT |
286 IRQENABLE_MCUBOUNDSINT));
287 sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT |
288 IRQSTATUS_MCVALIDINT |
289 IRQSTATUS_MCBOUNDSINT));
290
291
292
293
294
295 sr_test_cond_timeout((sr_read_reg(sr, IRQSTATUS) &
296 IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT,
297 timeout);
298
299 if (timeout >= SR_DISABLE_TIMEOUT)
300 dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
301 __func__);
302
303
304 sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT);
305 sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT);
306}
307
308static struct omap_sr_nvalue_table *sr_retrieve_nvalue_row(
309 struct omap_sr *sr, u32 efuse_offs)
310{
311 int i;
312
313 if (!sr->nvalue_table) {
314 dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n",
315 __func__);
316 return NULL;
317 }
318
319 for (i = 0; i < sr->nvalue_count; i++) {
320 if (sr->nvalue_table[i].efuse_offs == efuse_offs)
321 return &sr->nvalue_table[i];
322 }
323
324 return NULL;
325}
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341int sr_configure_errgen(struct omap_sr *sr)
342{
343 u32 sr_config, sr_errconfig, errconfig_offs;
344 u32 vpboundint_en, vpboundint_st;
345 u32 senp_en = 0, senn_en = 0;
346 u8 senp_shift, senn_shift;
347
348 if (!sr) {
349 pr_warn("%s: NULL omap_sr from %pS\n",
350 __func__, (void *)_RET_IP_);
351 return -EINVAL;
352 }
353
354 if (!sr->clk_length)
355 sr_set_clk_length(sr);
356
357 senp_en = sr->senp_mod;
358 senn_en = sr->senn_mod;
359
360 sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
361 SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN;
362
363 switch (sr->ip_type) {
364 case SR_TYPE_V1:
365 sr_config |= SRCONFIG_DELAYCTRL;
366 senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
367 senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
368 errconfig_offs = ERRCONFIG_V1;
369 vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
370 vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
371 break;
372 case SR_TYPE_V2:
373 senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
374 senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
375 errconfig_offs = ERRCONFIG_V2;
376 vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
377 vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
378 break;
379 default:
380 dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n",
381 __func__);
382 return -EINVAL;
383 }
384
385 sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
386 sr_write_reg(sr, SRCONFIG, sr_config);
387 sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) |
388 (sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) |
389 (sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT);
390 sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK |
391 SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK),
392 sr_errconfig);
393
394
395 sr_modify_reg(sr, errconfig_offs, (vpboundint_en | vpboundint_st),
396 vpboundint_en);
397
398 return 0;
399}
400
401
402
403
404
405
406
407
408
409
410int sr_disable_errgen(struct omap_sr *sr)
411{
412 u32 errconfig_offs;
413 u32 vpboundint_en, vpboundint_st;
414
415 if (!sr) {
416 pr_warn("%s: NULL omap_sr from %pS\n",
417 __func__, (void *)_RET_IP_);
418 return -EINVAL;
419 }
420
421 switch (sr->ip_type) {
422 case SR_TYPE_V1:
423 errconfig_offs = ERRCONFIG_V1;
424 vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
425 vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
426 break;
427 case SR_TYPE_V2:
428 errconfig_offs = ERRCONFIG_V2;
429 vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
430 vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
431 break;
432 default:
433 dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n",
434 __func__);
435 return -EINVAL;
436 }
437
438
439 sr_modify_reg(sr, SRCONFIG, SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN, 0);
440
441
442
443
444
445
446
447 sr_modify_reg(sr, errconfig_offs, vpboundint_en | vpboundint_st, 0);
448
449 return 0;
450}
451
452
453
454
455
456
457
458
459
460
461
462
463
464int sr_configure_minmax(struct omap_sr *sr)
465{
466 u32 sr_config, sr_avgwt;
467 u32 senp_en = 0, senn_en = 0;
468 u8 senp_shift, senn_shift;
469
470 if (!sr) {
471 pr_warn("%s: NULL omap_sr from %pS\n",
472 __func__, (void *)_RET_IP_);
473 return -EINVAL;
474 }
475
476 if (!sr->clk_length)
477 sr_set_clk_length(sr);
478
479 senp_en = sr->senp_mod;
480 senn_en = sr->senn_mod;
481
482 sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
483 SRCONFIG_SENENABLE |
484 (sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT);
485
486 switch (sr->ip_type) {
487 case SR_TYPE_V1:
488 sr_config |= SRCONFIG_DELAYCTRL;
489 senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
490 senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
491 break;
492 case SR_TYPE_V2:
493 senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
494 senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
495 break;
496 default:
497 dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n",
498 __func__);
499 return -EINVAL;
500 }
501
502 sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
503 sr_write_reg(sr, SRCONFIG, sr_config);
504 sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) |
505 (sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT);
506 sr_write_reg(sr, AVGWEIGHT, sr_avgwt);
507
508
509
510
511
512 switch (sr->ip_type) {
513 case SR_TYPE_V1:
514 sr_modify_reg(sr, ERRCONFIG_V1,
515 (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
516 ERRCONFIG_MCUBOUNDINTEN),
517 (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST |
518 ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST |
519 ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST));
520 break;
521 case SR_TYPE_V2:
522 sr_write_reg(sr, IRQSTATUS,
523 IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT |
524 IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT);
525 sr_write_reg(sr, IRQENABLE_SET,
526 IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT |
527 IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT);
528 break;
529 default:
530 dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n",
531 __func__);
532 return -EINVAL;
533 }
534
535 return 0;
536}
537
538
539
540
541
542
543
544
545
546
547
548
549int sr_enable(struct omap_sr *sr, unsigned long volt)
550{
551 struct omap_volt_data *volt_data;
552 struct omap_sr_nvalue_table *nvalue_row;
553 int ret;
554
555 if (!sr) {
556 pr_warn("%s: NULL omap_sr from %pS\n",
557 __func__, (void *)_RET_IP_);
558 return -EINVAL;
559 }
560
561 volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
562
563 if (IS_ERR(volt_data)) {
564 dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table for nominal voltage %ld\n",
565 __func__, volt);
566 return PTR_ERR(volt_data);
567 }
568
569 nvalue_row = sr_retrieve_nvalue_row(sr, volt_data->sr_efuse_offs);
570
571 if (!nvalue_row) {
572 dev_warn(&sr->pdev->dev, "%s: failure getting SR data for this voltage %ld\n",
573 __func__, volt);
574 return -ENODATA;
575 }
576
577
578 sr->err_minlimit = nvalue_row->errminlimit;
579
580 clk_enable(sr->fck);
581
582
583 if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE)
584 goto out_enabled;
585
586
587 ret = sr_class->configure(sr);
588 if (ret)
589 goto out_enabled;
590
591 sr_write_reg(sr, NVALUERECIPROCAL, nvalue_row->nvalue);
592
593
594 sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE);
595
596out_enabled:
597 sr->enabled = 1;
598
599 return 0;
600}
601
602
603
604
605
606
607
608
609void sr_disable(struct omap_sr *sr)
610{
611 if (!sr) {
612 pr_warn("%s: NULL omap_sr from %pS\n",
613 __func__, (void *)_RET_IP_);
614 return;
615 }
616
617
618 if (!sr->enabled)
619 return;
620
621
622
623
624
625 if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) {
626 switch (sr->ip_type) {
627 case SR_TYPE_V1:
628 sr_v1_disable(sr);
629 break;
630 case SR_TYPE_V2:
631 sr_v2_disable(sr);
632 break;
633 default:
634 dev_err(&sr->pdev->dev, "UNKNOWN IP type %d\n",
635 sr->ip_type);
636 }
637 }
638
639 clk_disable(sr->fck);
640 sr->enabled = 0;
641}
642
643
644
645
646
647
648
649
650
651int sr_register_class(struct omap_sr_class_data *class_data)
652{
653 struct omap_sr *sr_info;
654
655 if (!class_data) {
656 pr_warn("%s:, Smartreflex class data passed is NULL\n",
657 __func__);
658 return -EINVAL;
659 }
660
661 if (sr_class) {
662 pr_warn("%s: Smartreflex class driver already registered\n",
663 __func__);
664 return -EBUSY;
665 }
666
667 sr_class = class_data;
668
669
670
671
672
673 list_for_each_entry(sr_info, &sr_list, node)
674 sr_late_init(sr_info);
675
676 return 0;
677}
678
679
680
681
682
683
684
685
686
687
688
689void omap_sr_enable(struct voltagedomain *voltdm)
690{
691 struct omap_sr *sr = _sr_lookup(voltdm);
692
693 if (IS_ERR(sr)) {
694 pr_warn("%s: omap_sr struct for voltdm not found\n", __func__);
695 return;
696 }
697
698 if (!sr->autocomp_active)
699 return;
700
701 if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
702 dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n",
703 __func__);
704 return;
705 }
706
707 sr_class->enable(sr);
708}
709
710
711
712
713
714
715
716
717
718
719
720
721void omap_sr_disable(struct voltagedomain *voltdm)
722{
723 struct omap_sr *sr = _sr_lookup(voltdm);
724
725 if (IS_ERR(sr)) {
726 pr_warn("%s: omap_sr struct for voltdm not found\n", __func__);
727 return;
728 }
729
730 if (!sr->autocomp_active)
731 return;
732
733 if (!sr_class || !(sr_class->disable)) {
734 dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n",
735 __func__);
736 return;
737 }
738
739 sr_class->disable(sr, 0);
740}
741
742
743
744
745
746
747
748
749
750
751
752
753void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
754{
755 struct omap_sr *sr = _sr_lookup(voltdm);
756
757 if (IS_ERR(sr)) {
758 pr_warn("%s: omap_sr struct for voltdm not found\n", __func__);
759 return;
760 }
761
762 if (!sr->autocomp_active)
763 return;
764
765 if (!sr_class || !(sr_class->disable)) {
766 dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n",
767 __func__);
768 return;
769 }
770
771 sr_class->disable(sr, 1);
772}
773
774
775static int omap_sr_autocomp_show(void *data, u64 *val)
776{
777 struct omap_sr *sr_info = data;
778
779 if (!sr_info) {
780 pr_warn("%s: omap_sr struct not found\n", __func__);
781 return -EINVAL;
782 }
783
784 *val = sr_info->autocomp_active;
785
786 return 0;
787}
788
789static int omap_sr_autocomp_store(void *data, u64 val)
790{
791 struct omap_sr *sr_info = data;
792
793 if (!sr_info) {
794 pr_warn("%s: omap_sr struct not found\n", __func__);
795 return -EINVAL;
796 }
797
798
799 if (val > 1) {
800 pr_warn("%s: Invalid argument %lld\n", __func__, val);
801 return -EINVAL;
802 }
803
804
805 if (sr_info->autocomp_active != val) {
806 if (!val)
807 sr_stop_vddautocomp(sr_info);
808 else
809 sr_start_vddautocomp(sr_info);
810 }
811
812 return 0;
813}
814
815DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
816 omap_sr_autocomp_store, "%llu\n");
817
818static int omap_sr_probe(struct platform_device *pdev)
819{
820 struct omap_sr *sr_info;
821 struct omap_sr_data *pdata = pdev->dev.platform_data;
822 struct resource *mem, *irq;
823 struct dentry *nvalue_dir;
824 int i, ret = 0;
825
826 sr_info = devm_kzalloc(&pdev->dev, sizeof(struct omap_sr), GFP_KERNEL);
827 if (!sr_info)
828 return -ENOMEM;
829
830 sr_info->name = devm_kzalloc(&pdev->dev,
831 SMARTREFLEX_NAME_LEN, GFP_KERNEL);
832 if (!sr_info->name)
833 return -ENOMEM;
834
835 platform_set_drvdata(pdev, sr_info);
836
837 if (!pdata) {
838 dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
839 return -EINVAL;
840 }
841
842 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
843 sr_info->base = devm_ioremap_resource(&pdev->dev, mem);
844 if (IS_ERR(sr_info->base))
845 return PTR_ERR(sr_info->base);
846
847 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
848
849 sr_info->fck = devm_clk_get(pdev->dev.parent, "fck");
850 if (IS_ERR(sr_info->fck))
851 return PTR_ERR(sr_info->fck);
852 clk_prepare(sr_info->fck);
853
854 pm_runtime_enable(&pdev->dev);
855
856 snprintf(sr_info->name, SMARTREFLEX_NAME_LEN, "%s", pdata->name);
857
858 sr_info->pdev = pdev;
859 sr_info->srid = pdev->id;
860 sr_info->voltdm = pdata->voltdm;
861 sr_info->nvalue_table = pdata->nvalue_table;
862 sr_info->nvalue_count = pdata->nvalue_count;
863 sr_info->senn_mod = pdata->senn_mod;
864 sr_info->senp_mod = pdata->senp_mod;
865 sr_info->err_weight = pdata->err_weight;
866 sr_info->err_maxlimit = pdata->err_maxlimit;
867 sr_info->accum_data = pdata->accum_data;
868 sr_info->senn_avgweight = pdata->senn_avgweight;
869 sr_info->senp_avgweight = pdata->senp_avgweight;
870 sr_info->autocomp_active = false;
871 sr_info->ip_type = pdata->ip_type;
872
873 if (irq)
874 sr_info->irq = irq->start;
875
876 sr_set_clk_length(sr_info);
877
878 list_add(&sr_info->node, &sr_list);
879
880
881
882
883
884 if (sr_class) {
885 ret = sr_late_init(sr_info);
886 if (ret) {
887 pr_warn("%s: Error in SR late init\n", __func__);
888 goto err_list_del;
889 }
890 }
891
892 dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__);
893 if (!sr_dbg_dir)
894 sr_dbg_dir = debugfs_create_dir("smartreflex", NULL);
895
896 sr_info->dbg_dir = debugfs_create_dir(sr_info->name, sr_dbg_dir);
897
898 debugfs_create_file("autocomp", S_IRUGO | S_IWUSR, sr_info->dbg_dir,
899 sr_info, &pm_sr_fops);
900 debugfs_create_x32("errweight", S_IRUGO, sr_info->dbg_dir,
901 &sr_info->err_weight);
902 debugfs_create_x32("errmaxlimit", S_IRUGO, sr_info->dbg_dir,
903 &sr_info->err_maxlimit);
904
905 nvalue_dir = debugfs_create_dir("nvalue", sr_info->dbg_dir);
906
907 if (sr_info->nvalue_count == 0 || !sr_info->nvalue_table) {
908 dev_warn(&pdev->dev, "%s: %s: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values\n",
909 __func__, sr_info->name);
910
911 ret = -ENODATA;
912 goto err_debugfs;
913 }
914
915 for (i = 0; i < sr_info->nvalue_count; i++) {
916 char name[NVALUE_NAME_LEN + 1];
917
918 snprintf(name, sizeof(name), "volt_%lu",
919 sr_info->nvalue_table[i].volt_nominal);
920 debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir,
921 &(sr_info->nvalue_table[i].nvalue));
922 snprintf(name, sizeof(name), "errminlimit_%lu",
923 sr_info->nvalue_table[i].volt_nominal);
924 debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir,
925 &(sr_info->nvalue_table[i].errminlimit));
926
927 }
928
929 return ret;
930
931err_debugfs:
932 debugfs_remove_recursive(sr_info->dbg_dir);
933err_list_del:
934 list_del(&sr_info->node);
935 clk_unprepare(sr_info->fck);
936
937 return ret;
938}
939
940static int omap_sr_remove(struct platform_device *pdev)
941{
942 struct omap_sr_data *pdata = pdev->dev.platform_data;
943 struct device *dev = &pdev->dev;
944 struct omap_sr *sr_info;
945
946 if (!pdata) {
947 dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
948 return -EINVAL;
949 }
950
951 sr_info = _sr_lookup(pdata->voltdm);
952 if (IS_ERR(sr_info)) {
953 dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
954 __func__);
955 return PTR_ERR(sr_info);
956 }
957
958 if (sr_info->autocomp_active)
959 sr_stop_vddautocomp(sr_info);
960 debugfs_remove_recursive(sr_info->dbg_dir);
961
962 pm_runtime_disable(dev);
963 clk_unprepare(sr_info->fck);
964 list_del(&sr_info->node);
965 return 0;
966}
967
968static void omap_sr_shutdown(struct platform_device *pdev)
969{
970 struct omap_sr_data *pdata = pdev->dev.platform_data;
971 struct omap_sr *sr_info;
972
973 if (!pdata) {
974 dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
975 return;
976 }
977
978 sr_info = _sr_lookup(pdata->voltdm);
979 if (IS_ERR(sr_info)) {
980 dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
981 __func__);
982 return;
983 }
984
985 if (sr_info->autocomp_active)
986 sr_stop_vddautocomp(sr_info);
987
988 return;
989}
990
991static const struct of_device_id omap_sr_match[] = {
992 { .compatible = "ti,omap3-smartreflex-core", },
993 { .compatible = "ti,omap3-smartreflex-mpu-iva", },
994 { .compatible = "ti,omap4-smartreflex-core", },
995 { .compatible = "ti,omap4-smartreflex-mpu", },
996 { .compatible = "ti,omap4-smartreflex-iva", },
997 { },
998};
999MODULE_DEVICE_TABLE(of, omap_sr_match);
1000
1001static struct platform_driver smartreflex_driver = {
1002 .probe = omap_sr_probe,
1003 .remove = omap_sr_remove,
1004 .shutdown = omap_sr_shutdown,
1005 .driver = {
1006 .name = DRIVER_NAME,
1007 .of_match_table = omap_sr_match,
1008 },
1009};
1010
1011static int __init sr_init(void)
1012{
1013 int ret = 0;
1014
1015 ret = platform_driver_register(&smartreflex_driver);
1016 if (ret) {
1017 pr_err("%s: platform driver register failed for SR\n",
1018 __func__);
1019 return ret;
1020 }
1021
1022 return 0;
1023}
1024late_initcall(sr_init);
1025
1026static void __exit sr_exit(void)
1027{
1028 platform_driver_unregister(&smartreflex_driver);
1029}
1030module_exit(sr_exit);
1031
1032MODULE_DESCRIPTION("OMAP Smartreflex Driver");
1033MODULE_LICENSE("GPL");
1034MODULE_ALIAS("platform:" DRIVER_NAME);
1035MODULE_AUTHOR("Texas Instruments Inc");
1036