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8#include <linux/bitfield.h>
9#include <linux/clk.h>
10#include <linux/gpio/consumer.h>
11#include <linux/gpio/driver.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/leds.h>
15#include <linux/mfd/syscon.h>
16#include <linux/module.h>
17#include <linux/platform_device.h>
18#include <linux/property.h>
19#include <linux/regmap.h>
20#include <linux/sizes.h>
21#include <linux/uaccess.h>
22
23#define SSO_DEV_NAME "lgm-sso"
24
25#define LED_BLINK_H8_0 0x0
26#define LED_BLINK_H8_1 0x4
27#define GET_FREQ_OFFSET(pin, src) (((pin) * 6) + ((src) * 2))
28#define GET_SRC_OFFSET(pinc) (((pin) * 6) + 4)
29
30#define DUTY_CYCLE(x) (0x8 + ((x) * 4))
31#define SSO_CON0 0x2B0
32#define SSO_CON0_RZFL BIT(26)
33#define SSO_CON0_BLINK_R BIT(30)
34#define SSO_CON0_SWU BIT(31)
35
36#define SSO_CON1 0x2B4
37#define SSO_CON1_FCDSC GENMASK(21, 20)
38#define SSO_CON1_FPID GENMASK(24, 23)
39#define SSO_CON1_GPTD GENMASK(26, 25)
40#define SSO_CON1_US GENMASK(31, 30)
41
42#define SSO_CPU 0x2B8
43#define SSO_CON2 0x2C4
44#define SSO_CON3 0x2C8
45
46
47#define MAX_PIN_NUM_PER_BANK SZ_32
48#define MAX_GROUP_NUM SZ_4
49#define PINS_PER_GROUP SZ_8
50#define FPID_FREQ_RANK_MAX SZ_4
51#define SSO_LED_MAX_NUM SZ_32
52#define MAX_FREQ_RANK 10
53#define DEF_GPTC_CLK_RATE 200000000
54#define SSO_DEF_BRIGHTNESS LED_HALF
55#define DATA_CLK_EDGE 0
56
57static const u32 freq_div_tbl[] = {4000, 2000, 1000, 800};
58static const int freq_tbl[] = {2, 4, 8, 10, 50000, 100000, 200000, 250000};
59static const int shift_clk_freq_tbl[] = {25000000, 12500000, 6250000, 3125000};
60
61
62
63
64
65
66
67enum {
68 US_SW = 0,
69 US_GPTC = 1,
70 US_FPID = 2
71};
72
73enum {
74 MAX_FPID_FREQ_RANK = 5,
75 MAX_GPTC_FREQ_RANK = 9,
76 MAX_GPTC_HS_FREQ_RANK = 10,
77};
78
79enum {
80 LED_GRP0_PIN_MAX = 24,
81 LED_GRP1_PIN_MAX = 29,
82 LED_GRP2_PIN_MAX = 32,
83};
84
85enum {
86 LED_GRP0_0_23,
87 LED_GRP1_24_28,
88 LED_GRP2_29_31,
89 LED_GROUP_MAX,
90};
91
92enum {
93 CLK_SRC_FPID = 0,
94 CLK_SRC_GPTC = 1,
95 CLK_SRC_GPTC_HS = 2,
96};
97
98struct sso_led_priv;
99
100struct sso_led_desc {
101 const char *name;
102 const char *default_trigger;
103 unsigned int brightness;
104 unsigned int blink_rate;
105 unsigned int retain_state_suspended:1;
106 unsigned int retain_state_shutdown:1;
107 unsigned int panic_indicator:1;
108 unsigned int hw_blink:1;
109 unsigned int hw_trig:1;
110 unsigned int blinking:1;
111 int freq_idx;
112 u32 pin;
113};
114
115struct sso_led {
116 struct list_head list;
117 struct led_classdev cdev;
118 struct gpio_desc *gpiod;
119 struct sso_led_desc desc;
120 struct sso_led_priv *priv;
121};
122
123struct sso_gpio {
124 struct gpio_chip chip;
125 int shift_clk_freq;
126 int edge;
127 int freq;
128 u32 pins;
129 u32 alloc_bitmap;
130};
131
132struct sso_led_priv {
133 struct regmap *mmap;
134 struct device *dev;
135 struct platform_device *pdev;
136 struct clk_bulk_data clocks[2];
137 u32 fpid_clkrate;
138 u32 gptc_clkrate;
139 u32 freq[MAX_FREQ_RANK];
140 struct list_head led_list;
141 struct sso_gpio gpio;
142};
143
144static int sso_get_blink_rate_idx(struct sso_led_priv *priv, u32 rate)
145{
146 int i;
147
148 for (i = 0; i < MAX_FREQ_RANK; i++) {
149 if (rate <= priv->freq[i])
150 return i;
151 }
152
153 return -1;
154}
155
156static unsigned int sso_led_pin_to_group(u32 pin)
157{
158 if (pin < LED_GRP0_PIN_MAX)
159 return LED_GRP0_0_23;
160 else if (pin < LED_GRP1_PIN_MAX)
161 return LED_GRP1_24_28;
162 else
163 return LED_GRP2_29_31;
164}
165
166static u32 sso_led_get_freq_src(int freq_idx)
167{
168 if (freq_idx < MAX_FPID_FREQ_RANK)
169 return CLK_SRC_FPID;
170 else if (freq_idx < MAX_GPTC_FREQ_RANK)
171 return CLK_SRC_GPTC;
172 else
173 return CLK_SRC_GPTC_HS;
174}
175
176static u32 sso_led_pin_blink_off(u32 pin, unsigned int group)
177{
178 if (group == LED_GRP2_29_31)
179 return pin - LED_GRP1_PIN_MAX;
180 else if (group == LED_GRP1_24_28)
181 return pin - LED_GRP0_PIN_MAX;
182 else
183 return SSO_LED_MAX_NUM - LED_GRP1_PIN_MAX;
184}
185
186static struct sso_led
187*cdev_to_sso_led_data(struct led_classdev *led_cdev)
188{
189 return container_of(led_cdev, struct sso_led, cdev);
190}
191
192static void sso_led_freq_set(struct sso_led_priv *priv, u32 pin, int freq_idx)
193{
194 u32 reg, off, freq_src, val_freq;
195 u32 low, high, val;
196 unsigned int group;
197
198 if (!freq_idx)
199 return;
200
201 group = sso_led_pin_to_group(pin);
202 freq_src = sso_led_get_freq_src(freq_idx);
203 off = sso_led_pin_blink_off(pin, group);
204
205 if (group == LED_GRP0_0_23)
206 return;
207 else if (group == LED_GRP1_24_28)
208 reg = LED_BLINK_H8_0;
209 else
210 reg = LED_BLINK_H8_1;
211
212 if (freq_src == CLK_SRC_FPID)
213 val_freq = freq_idx - 1;
214 else if (freq_src == CLK_SRC_GPTC)
215 val_freq = freq_idx - MAX_FPID_FREQ_RANK;
216
217
218 if (freq_src != CLK_SRC_GPTC_HS) {
219 low = GET_FREQ_OFFSET(off, freq_src);
220 high = low + 2;
221 val = val_freq << high;
222 regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
223 }
224
225
226 low = GET_SRC_OFFSET(off);
227 high = low + 2;
228 val = freq_src << high;
229 regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
230}
231
232static void sso_led_brightness_set(struct led_classdev *led_cdev,
233 enum led_brightness brightness)
234{
235 struct sso_led_priv *priv;
236 struct sso_led_desc *desc;
237 struct sso_led *led;
238 int val;
239
240 led = cdev_to_sso_led_data(led_cdev);
241 priv = led->priv;
242 desc = &led->desc;
243
244 desc->brightness = brightness;
245 regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), brightness);
246
247 if (brightness == LED_OFF)
248 val = 0;
249 else
250 val = 1;
251
252
253 if (desc->hw_blink && !val && desc->blinking) {
254 desc->blinking = 0;
255 regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin), 0);
256 } else if (desc->hw_blink && val && !desc->blinking) {
257 desc->blinking = 1;
258 regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
259 1 << desc->pin);
260 }
261
262 if (!desc->hw_trig)
263 gpiod_set_value(led->gpiod, val);
264}
265
266static enum led_brightness sso_led_brightness_get(struct led_classdev *led_cdev)
267{
268 struct sso_led *led = cdev_to_sso_led_data(led_cdev);
269
270 return (enum led_brightness)led->desc.brightness;
271}
272
273static int
274delay_to_freq_idx(struct sso_led *led, unsigned long *delay_on,
275 unsigned long *delay_off)
276{
277 struct sso_led_priv *priv = led->priv;
278 unsigned long delay;
279 int freq_idx;
280 u32 freq;
281
282 if (!*delay_on && !*delay_off) {
283 *delay_on = *delay_off = (1000 / priv->freq[0]) / 2;
284 return 0;
285 }
286
287 delay = *delay_on + *delay_off;
288 freq = 1000 / delay;
289
290 freq_idx = sso_get_blink_rate_idx(priv, freq);
291 if (freq_idx == -1)
292 freq_idx = MAX_FREQ_RANK - 1;
293
294 delay = 1000 / priv->freq[freq_idx];
295 *delay_on = *delay_off = delay / 2;
296
297 if (!*delay_on)
298 *delay_on = *delay_off = 1;
299
300 return freq_idx;
301}
302
303static int
304sso_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
305 unsigned long *delay_off)
306{
307 struct sso_led_priv *priv;
308 struct sso_led *led;
309 int freq_idx;
310
311 led = cdev_to_sso_led_data(led_cdev);
312 priv = led->priv;
313 freq_idx = delay_to_freq_idx(led, delay_on, delay_off);
314
315 sso_led_freq_set(priv, led->desc.pin, freq_idx);
316 regmap_update_bits(priv->mmap, SSO_CON2, BIT(led->desc.pin),
317 1 << led->desc.pin);
318 led->desc.freq_idx = freq_idx;
319 led->desc.blink_rate = priv->freq[freq_idx];
320 led->desc.blinking = 1;
321
322 return 1;
323}
324
325static void sso_led_hw_cfg(struct sso_led_priv *priv, struct sso_led *led)
326{
327 struct sso_led_desc *desc = &led->desc;
328
329
330 if (desc->hw_blink) {
331 sso_led_freq_set(priv, desc->pin, desc->freq_idx);
332 regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
333 1 << desc->pin);
334 }
335
336 if (desc->hw_trig)
337 regmap_update_bits(priv->mmap, SSO_CON3, BIT(desc->pin),
338 1 << desc->pin);
339
340
341 regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), desc->brightness);
342
343
344 if (!desc->hw_trig && desc->brightness)
345 gpiod_set_value(led->gpiod, 1);
346}
347
348static int sso_create_led(struct sso_led_priv *priv, struct sso_led *led,
349 struct fwnode_handle *child)
350{
351 struct sso_led_desc *desc = &led->desc;
352 struct led_init_data init_data;
353 int err;
354
355 init_data.fwnode = child;
356 init_data.devicename = SSO_DEV_NAME;
357 init_data.default_label = ":";
358
359 led->cdev.default_trigger = desc->default_trigger;
360 led->cdev.brightness_set = sso_led_brightness_set;
361 led->cdev.brightness_get = sso_led_brightness_get;
362 led->cdev.brightness = desc->brightness;
363 led->cdev.max_brightness = LED_FULL;
364
365 if (desc->retain_state_shutdown)
366 led->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
367 if (desc->retain_state_suspended)
368 led->cdev.flags |= LED_CORE_SUSPENDRESUME;
369 if (desc->panic_indicator)
370 led->cdev.flags |= LED_PANIC_INDICATOR;
371
372 if (desc->hw_blink)
373 led->cdev.blink_set = sso_led_blink_set;
374
375 sso_led_hw_cfg(priv, led);
376
377 err = devm_led_classdev_register_ext(priv->dev, &led->cdev, &init_data);
378 if (err)
379 return err;
380
381 list_add(&led->list, &priv->led_list);
382
383 return 0;
384}
385
386static void sso_init_freq(struct sso_led_priv *priv)
387{
388 int i;
389
390 priv->freq[0] = 0;
391 for (i = 1; i < MAX_FREQ_RANK; i++) {
392 if (i < MAX_FPID_FREQ_RANK) {
393 priv->freq[i] = priv->fpid_clkrate / freq_div_tbl[i - 1];
394 } else if (i < MAX_GPTC_FREQ_RANK) {
395 priv->freq[i] = priv->gptc_clkrate /
396 freq_div_tbl[i - MAX_FPID_FREQ_RANK];
397 } else if (i < MAX_GPTC_HS_FREQ_RANK) {
398 priv->freq[i] = priv->gptc_clkrate;
399 }
400 }
401}
402
403static int sso_gpio_request(struct gpio_chip *chip, unsigned int offset)
404{
405 struct sso_led_priv *priv = gpiochip_get_data(chip);
406
407 if (priv->gpio.alloc_bitmap & BIT(offset))
408 return -EINVAL;
409
410 priv->gpio.alloc_bitmap |= BIT(offset);
411 regmap_write(priv->mmap, DUTY_CYCLE(offset), 0xFF);
412
413 return 0;
414}
415
416static void sso_gpio_free(struct gpio_chip *chip, unsigned int offset)
417{
418 struct sso_led_priv *priv = gpiochip_get_data(chip);
419
420 priv->gpio.alloc_bitmap &= ~BIT(offset);
421 regmap_write(priv->mmap, DUTY_CYCLE(offset), 0x0);
422}
423
424static int sso_gpio_get_dir(struct gpio_chip *chip, unsigned int offset)
425{
426 return GPIO_LINE_DIRECTION_OUT;
427}
428
429static int
430sso_gpio_dir_out(struct gpio_chip *chip, unsigned int offset, int value)
431{
432 struct sso_led_priv *priv = gpiochip_get_data(chip);
433 bool bit = !!value;
434
435 regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), bit << offset);
436 if (!priv->gpio.freq)
437 regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
438 SSO_CON0_SWU);
439
440 return 0;
441}
442
443static int sso_gpio_get(struct gpio_chip *chip, unsigned int offset)
444{
445 struct sso_led_priv *priv = gpiochip_get_data(chip);
446 u32 reg_val;
447
448 regmap_read(priv->mmap, SSO_CPU, ®_val);
449
450 return !!(reg_val & BIT(offset));
451}
452
453static void sso_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
454{
455 struct sso_led_priv *priv = gpiochip_get_data(chip);
456
457 regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), value << offset);
458 if (!priv->gpio.freq)
459 regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
460 SSO_CON0_SWU);
461}
462
463static int sso_gpio_gc_init(struct device *dev, struct sso_led_priv *priv)
464{
465 struct gpio_chip *gc = &priv->gpio.chip;
466
467 gc->request = sso_gpio_request;
468 gc->free = sso_gpio_free;
469 gc->get_direction = sso_gpio_get_dir;
470 gc->direction_output = sso_gpio_dir_out;
471 gc->get = sso_gpio_get;
472 gc->set = sso_gpio_set;
473
474 gc->label = "lgm-sso";
475 gc->base = -1;
476
477 gc->ngpio = priv->gpio.pins;
478 gc->parent = dev;
479 gc->owner = THIS_MODULE;
480
481 return devm_gpiochip_add_data(dev, gc, priv);
482}
483
484static int sso_gpio_get_freq_idx(int freq)
485{
486 int idx;
487
488 for (idx = 0; idx < ARRAY_SIZE(freq_tbl); idx++) {
489 if (freq <= freq_tbl[idx])
490 return idx;
491 }
492
493 return -1;
494}
495
496static void sso_register_shift_clk(struct sso_led_priv *priv)
497{
498 int idx, size = ARRAY_SIZE(shift_clk_freq_tbl);
499 u32 val = 0;
500
501 for (idx = 0; idx < size; idx++) {
502 if (shift_clk_freq_tbl[idx] <= priv->gpio.shift_clk_freq) {
503 val = idx;
504 break;
505 }
506 }
507
508 if (idx == size)
509 dev_warn(priv->dev, "%s: Invalid freq %d\n",
510 __func__, priv->gpio.shift_clk_freq);
511
512 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FCDSC,
513 FIELD_PREP(SSO_CON1_FCDSC, val));
514}
515
516static int sso_gpio_freq_set(struct sso_led_priv *priv)
517{
518 int freq_idx;
519 u32 val;
520
521 freq_idx = sso_gpio_get_freq_idx(priv->gpio.freq);
522 if (freq_idx == -1)
523 freq_idx = ARRAY_SIZE(freq_tbl) - 1;
524
525 val = freq_idx % FPID_FREQ_RANK_MAX;
526
527 if (!priv->gpio.freq) {
528 regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R, 0);
529 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
530 FIELD_PREP(SSO_CON1_US, US_SW));
531 } else if (freq_idx < FPID_FREQ_RANK_MAX) {
532 regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
533 SSO_CON0_BLINK_R);
534 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
535 FIELD_PREP(SSO_CON1_US, US_FPID));
536 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FPID,
537 FIELD_PREP(SSO_CON1_FPID, val));
538 } else {
539 regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
540 SSO_CON0_BLINK_R);
541 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
542 FIELD_PREP(SSO_CON1_US, US_GPTC));
543 regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_GPTD,
544 FIELD_PREP(SSO_CON1_GPTD, val));
545 }
546
547 return 0;
548}
549
550static int sso_gpio_hw_init(struct sso_led_priv *priv)
551{
552 u32 activate;
553 int i, err;
554
555
556 for (i = 0; i < priv->gpio.pins; i++) {
557 err = regmap_write(priv->mmap, DUTY_CYCLE(i), 0);
558 if (err)
559 return err;
560 }
561
562
563 for (i = 1; i <= MAX_GROUP_NUM; i++) {
564 activate = !!(i * PINS_PER_GROUP <= priv->gpio.pins ||
565 priv->gpio.pins > (i - 1) * PINS_PER_GROUP);
566 err = regmap_update_bits(priv->mmap, SSO_CON1, BIT(i - 1),
567 activate << (i - 1));
568 if (err)
569 return err;
570 }
571
572
573 err = regmap_write(priv->mmap, SSO_CON3, 0);
574 if (err)
575 return err;
576
577
578 err = regmap_write(priv->mmap, SSO_CON2, 0);
579 if (err)
580 return err;
581
582
583 err = regmap_write(priv->mmap, SSO_CPU, 0);
584 if (err)
585 return err;
586
587
588 err = regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_RZFL,
589 FIELD_PREP(SSO_CON0_RZFL, priv->gpio.edge));
590 if (err)
591 return err;
592
593
594 sso_gpio_freq_set(priv);
595
596
597 sso_register_shift_clk(priv);
598
599 return 0;
600}
601
602static void sso_led_shutdown(struct sso_led *led)
603{
604 struct sso_led_priv *priv = led->priv;
605
606
607 devm_led_classdev_unregister(priv->dev, &led->cdev);
608
609
610 if (led->desc.hw_trig)
611 regmap_update_bits(priv->mmap, SSO_CON3, BIT(led->desc.pin), 0);
612
613 led->priv = NULL;
614}
615
616static int
617__sso_led_dt_parse(struct sso_led_priv *priv, struct fwnode_handle *fw_ssoled)
618{
619 struct fwnode_handle *fwnode_child;
620 struct device *dev = priv->dev;
621 struct sso_led_desc *desc;
622 struct sso_led *led;
623 const char *tmp;
624 u32 prop;
625 int ret;
626
627 fwnode_for_each_child_node(fw_ssoled, fwnode_child) {
628 led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
629 if (!led) {
630 ret = -ENOMEM;
631 goto __dt_err;
632 }
633
634 INIT_LIST_HEAD(&led->list);
635 led->priv = priv;
636 desc = &led->desc;
637
638 led->gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL,
639 fwnode_child,
640 GPIOD_ASIS, NULL);
641 if (IS_ERR(led->gpiod)) {
642 ret = dev_err_probe(dev, PTR_ERR(led->gpiod), "led: get gpio fail!\n");
643 goto __dt_err;
644 }
645
646 fwnode_property_read_string(fwnode_child,
647 "linux,default-trigger",
648 &desc->default_trigger);
649
650 if (fwnode_property_present(fwnode_child,
651 "retain-state-suspended"))
652 desc->retain_state_suspended = 1;
653
654 if (fwnode_property_present(fwnode_child,
655 "retain-state-shutdown"))
656 desc->retain_state_shutdown = 1;
657
658 if (fwnode_property_present(fwnode_child, "panic-indicator"))
659 desc->panic_indicator = 1;
660
661 ret = fwnode_property_read_u32(fwnode_child, "reg", &prop);
662 if (ret)
663 goto __dt_err;
664 if (prop >= SSO_LED_MAX_NUM) {
665 dev_err(dev, "invalid LED pin:%u\n", prop);
666 ret = -EINVAL;
667 goto __dt_err;
668 }
669 desc->pin = prop;
670
671 if (fwnode_property_present(fwnode_child, "intel,sso-hw-blink"))
672 desc->hw_blink = 1;
673
674 desc->hw_trig = fwnode_property_read_bool(fwnode_child,
675 "intel,sso-hw-trigger");
676 if (desc->hw_trig) {
677 desc->default_trigger = NULL;
678 desc->retain_state_shutdown = 0;
679 desc->retain_state_suspended = 0;
680 desc->panic_indicator = 0;
681 desc->hw_blink = 0;
682 }
683
684 if (fwnode_property_read_u32(fwnode_child,
685 "intel,sso-blink-rate-hz", &prop)) {
686
687 desc->freq_idx = 0;
688 desc->blink_rate = priv->freq[desc->freq_idx];
689 } else {
690 desc->freq_idx = sso_get_blink_rate_idx(priv, prop);
691 if (desc->freq_idx == -1)
692 desc->freq_idx = MAX_FREQ_RANK - 1;
693
694 desc->blink_rate = priv->freq[desc->freq_idx];
695 }
696
697 if (!fwnode_property_read_string(fwnode_child, "default-state", &tmp)) {
698 if (!strcmp(tmp, "on"))
699 desc->brightness = LED_FULL;
700 }
701
702 ret = sso_create_led(priv, led, fwnode_child);
703 if (ret)
704 goto __dt_err;
705 }
706
707 return 0;
708
709__dt_err:
710 fwnode_handle_put(fwnode_child);
711
712 list_for_each_entry(led, &priv->led_list, list)
713 sso_led_shutdown(led);
714
715 return ret;
716}
717
718static int sso_led_dt_parse(struct sso_led_priv *priv)
719{
720 struct fwnode_handle *fwnode = dev_fwnode(priv->dev);
721 struct fwnode_handle *fw_ssoled;
722 struct device *dev = priv->dev;
723 int count;
724 int ret;
725
726 count = device_get_child_node_count(dev);
727 if (!count)
728 return 0;
729
730 fw_ssoled = fwnode_get_named_child_node(fwnode, "ssoled");
731 if (fw_ssoled) {
732 ret = __sso_led_dt_parse(priv, fw_ssoled);
733 fwnode_handle_put(fw_ssoled);
734 if (ret)
735 return ret;
736 }
737
738 return 0;
739}
740
741static int sso_probe_gpios(struct sso_led_priv *priv)
742{
743 struct device *dev = priv->dev;
744 int ret;
745
746 if (device_property_read_u32(dev, "ngpios", &priv->gpio.pins))
747 priv->gpio.pins = MAX_PIN_NUM_PER_BANK;
748
749 if (priv->gpio.pins > MAX_PIN_NUM_PER_BANK)
750 return -EINVAL;
751
752 if (device_property_read_u32(dev, "intel,sso-update-rate-hz",
753 &priv->gpio.freq))
754 priv->gpio.freq = 0;
755
756 priv->gpio.edge = DATA_CLK_EDGE;
757 priv->gpio.shift_clk_freq = -1;
758
759 ret = sso_gpio_hw_init(priv);
760 if (ret)
761 return ret;
762
763 return sso_gpio_gc_init(dev, priv);
764}
765
766static void sso_clock_disable_unprepare(void *data)
767{
768 struct sso_led_priv *priv = data;
769
770 clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks);
771}
772
773static int intel_sso_led_probe(struct platform_device *pdev)
774{
775 struct device *dev = &pdev->dev;
776 struct sso_led_priv *priv;
777 int ret;
778
779 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
780 if (!priv)
781 return -ENOMEM;
782
783 priv->pdev = pdev;
784 priv->dev = dev;
785
786
787 priv->clocks[0].id = "sso";
788
789
790 priv->clocks[1].id = "fpid";
791
792 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clocks), priv->clocks);
793 if (ret) {
794 dev_err(dev, "Getting clocks failed!\n");
795 return ret;
796 }
797
798 ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks);
799 if (ret) {
800 dev_err(dev, "Failed to prepare and enable clocks!\n");
801 return ret;
802 }
803
804 ret = devm_add_action_or_reset(dev, sso_clock_disable_unprepare, priv);
805 if (ret)
806 return ret;
807
808 priv->fpid_clkrate = clk_get_rate(priv->clocks[1].clk);
809
810 priv->mmap = syscon_node_to_regmap(dev->of_node);
811
812 priv->mmap = syscon_node_to_regmap(dev->of_node);
813 if (IS_ERR(priv->mmap)) {
814 dev_err(dev, "Failed to map iomem!\n");
815 return PTR_ERR(priv->mmap);
816 }
817
818 ret = sso_probe_gpios(priv);
819 if (ret) {
820 regmap_exit(priv->mmap);
821 return ret;
822 }
823
824 INIT_LIST_HEAD(&priv->led_list);
825
826 platform_set_drvdata(pdev, priv);
827 sso_init_freq(priv);
828
829 priv->gptc_clkrate = DEF_GPTC_CLK_RATE;
830
831 ret = sso_led_dt_parse(priv);
832 if (ret) {
833 regmap_exit(priv->mmap);
834 return ret;
835 }
836 dev_info(priv->dev, "sso LED init success!\n");
837
838 return 0;
839}
840
841static int intel_sso_led_remove(struct platform_device *pdev)
842{
843 struct sso_led_priv *priv;
844 struct sso_led *led, *n;
845
846 priv = platform_get_drvdata(pdev);
847
848 list_for_each_entry_safe(led, n, &priv->led_list, list) {
849 list_del(&led->list);
850 sso_led_shutdown(led);
851 }
852
853 regmap_exit(priv->mmap);
854
855 return 0;
856}
857
858static const struct of_device_id of_sso_led_match[] = {
859 { .compatible = "intel,lgm-ssoled" },
860 {}
861};
862
863MODULE_DEVICE_TABLE(of, of_sso_led_match);
864
865static struct platform_driver intel_sso_led_driver = {
866 .probe = intel_sso_led_probe,
867 .remove = intel_sso_led_remove,
868 .driver = {
869 .name = "lgm-ssoled",
870 .of_match_table = of_sso_led_match,
871 },
872};
873
874module_platform_driver(intel_sso_led_driver);
875
876MODULE_DESCRIPTION("Intel SSO LED/GPIO driver");
877MODULE_LICENSE("GPL v2");
878
