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path: root/drivers/extcon/extcon-sm5502.c
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-rw-r--r--drivers/extcon/extcon-sm5502.c724
1 files changed, 724 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644
index 000000000000..560d7dccec7b
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.c
@@ -0,0 +1,724 @@
1/*
2 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
3 *
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
5 * Author: Chanwoo Choi <cw00.choi@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/err.h>
19#include <linux/i2c.h>
20#include <linux/input.h>
21#include <linux/interrupt.h>
22#include <linux/irqdomain.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/platform_device.h>
26#include <linux/regmap.h>
27#include <linux/slab.h>
28#include <linux/extcon.h>
29#include <linux/extcon/sm5502.h>
30
31#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
32
33struct muic_irq {
34 unsigned int irq;
35 const char *name;
36 unsigned int virq;
37};
38
39struct reg_data {
40 u8 reg;
41 unsigned int val;
42 bool invert;
43};
44
45struct sm5502_muic_info {
46 struct device *dev;
47 struct extcon_dev *edev;
48
49 struct i2c_client *i2c;
50 struct regmap *regmap;
51
52 struct regmap_irq_chip_data *irq_data;
53 struct muic_irq *muic_irqs;
54 unsigned int num_muic_irqs;
55 int irq;
56 bool irq_attach;
57 bool irq_detach;
58 struct work_struct irq_work;
59
60 struct reg_data *reg_data;
61 unsigned int num_reg_data;
62
63 struct mutex mutex;
64
65 /*
66 * Use delayed workqueue to detect cable state and then
67 * notify cable state to notifiee/platform through uevent.
68 * After completing the booting of platform, the extcon provider
69 * driver should notify cable state to upper layer.
70 */
71 struct delayed_work wq_detcable;
72};
73
74/* Default value of SM5502 register to bring up MUIC device. */
75static struct reg_data sm5502_reg_data[] = {
76 {
77 .reg = SM5502_REG_CONTROL,
78 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
79 .invert = false,
80 }, {
81 .reg = SM5502_REG_INTMASK1,
82 .val = SM5502_REG_INTM1_KP_MASK
83 | SM5502_REG_INTM1_LKP_MASK
84 | SM5502_REG_INTM1_LKR_MASK,
85 .invert = true,
86 }, {
87 .reg = SM5502_REG_INTMASK2,
88 .val = SM5502_REG_INTM2_VBUS_DET_MASK
89 | SM5502_REG_INTM2_REV_ACCE_MASK
90 | SM5502_REG_INTM2_ADC_CHG_MASK
91 | SM5502_REG_INTM2_STUCK_KEY_MASK
92 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
93 | SM5502_REG_INTM2_MHL_MASK,
94 .invert = true,
95 },
96 { }
97};
98
99/* List of detectable cables */
100enum {
101 EXTCON_CABLE_USB = 0,
102 EXTCON_CABLE_USB_HOST,
103 EXTCON_CABLE_TA,
104
105 EXTCON_CABLE_END,
106};
107
108static const char *sm5502_extcon_cable[] = {
109 [EXTCON_CABLE_USB] = "USB",
110 [EXTCON_CABLE_USB_HOST] = "USB-Host",
111 [EXTCON_CABLE_TA] = "TA",
112 NULL,
113};
114
115/* Define supported accessory type */
116enum sm5502_muic_acc_type {
117 SM5502_MUIC_ADC_GROUND = 0x0,
118 SM5502_MUIC_ADC_SEND_END_BUTTON,
119 SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
120 SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
121 SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
122 SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
123 SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
124 SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
125 SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
126 SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
127 SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
128 SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
129 SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
130 SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
131 SM5502_MUIC_ADC_RESERVED_ACC_1,
132 SM5502_MUIC_ADC_RESERVED_ACC_2,
133 SM5502_MUIC_ADC_RESERVED_ACC_3,
134 SM5502_MUIC_ADC_RESERVED_ACC_4,
135 SM5502_MUIC_ADC_RESERVED_ACC_5,
136 SM5502_MUIC_ADC_AUDIO_TYPE2,
137 SM5502_MUIC_ADC_PHONE_POWERED_DEV,
138 SM5502_MUIC_ADC_TTY_CONVERTER,
139 SM5502_MUIC_ADC_UART_CABLE,
140 SM5502_MUIC_ADC_TYPE1_CHARGER,
141 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
142 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
143 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
144 SM5502_MUIC_ADC_TYPE2_CHARGER,
145 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
146 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
147 SM5502_MUIC_ADC_AUDIO_TYPE1,
148 SM5502_MUIC_ADC_OPEN = 0x1f,
149
150 /* The below accessories have same ADC value (0x1f or 0x1e).
151 So, Device type1 is used to separate specific accessory. */
152 /* |---------|--ADC| */
153 /* | [7:5]|[4:0]| */
154 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
155 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
156 /* |Dev Type1|--ADC| */
157 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
158 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
159 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
160};
161
162/* List of supported interrupt for SM5502 */
163static struct muic_irq sm5502_muic_irqs[] = {
164 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
165 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
166 { SM5502_IRQ_INT1_KP, "muic-kp" },
167 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
168 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
169 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
170 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
171 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
172 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
173 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
174 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
175 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
176 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
177 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
178};
179
180/* Define interrupt list of SM5502 to register regmap_irq */
181static const struct regmap_irq sm5502_irqs[] = {
182 /* INT1 interrupts */
183 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
184 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
185 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
186 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
187 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
188 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
189 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
190 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
191
192 /* INT2 interrupts */
193 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
194 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
195 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
196 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
197 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
198 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
199};
200
201static const struct regmap_irq_chip sm5502_muic_irq_chip = {
202 .name = "sm5502",
203 .status_base = SM5502_REG_INT1,
204 .mask_base = SM5502_REG_INTMASK1,
205 .mask_invert = false,
206 .num_regs = 2,
207 .irqs = sm5502_irqs,
208 .num_irqs = ARRAY_SIZE(sm5502_irqs),
209};
210
211/* Define regmap configuration of SM5502 for I2C communication */
212static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
213{
214 switch (reg) {
215 case SM5502_REG_INTMASK1:
216 case SM5502_REG_INTMASK2:
217 return true;
218 default:
219 break;
220 }
221 return false;
222}
223
224static const struct regmap_config sm5502_muic_regmap_config = {
225 .reg_bits = 8,
226 .val_bits = 8,
227 .volatile_reg = sm5502_muic_volatile_reg,
228 .max_register = SM5502_REG_END,
229};
230
231/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
232static int sm5502_muic_set_path(struct sm5502_muic_info *info,
233 unsigned int con_sw, unsigned int vbus_sw,
234 bool attached)
235{
236 int ret;
237
238 if (!attached) {
239 con_sw = DM_DP_SWITCH_OPEN;
240 vbus_sw = VBUSIN_SWITCH_OPEN;
241 }
242
243 switch (con_sw) {
244 case DM_DP_SWITCH_OPEN:
245 case DM_DP_SWITCH_USB:
246 case DM_DP_SWITCH_AUDIO:
247 case DM_DP_SWITCH_UART:
248 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
249 SM5502_REG_MANUAL_SW1_DP_MASK |
250 SM5502_REG_MANUAL_SW1_DM_MASK,
251 con_sw);
252 if (ret < 0) {
253 dev_err(info->dev,
254 "cannot update DM_CON/DP_CON switch\n");
255 return ret;
256 }
257 break;
258 default:
259 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
260 con_sw);
261 return -EINVAL;
262 };
263
264 switch (vbus_sw) {
265 case VBUSIN_SWITCH_OPEN:
266 case VBUSIN_SWITCH_VBUSOUT:
267 case VBUSIN_SWITCH_MIC:
268 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
269 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
270 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
271 vbus_sw);
272 if (ret < 0) {
273 dev_err(info->dev,
274 "cannot update VBUSIN switch\n");
275 return ret;
276 }
277 break;
278 default:
279 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
280 return -EINVAL;
281 };
282
283 return 0;
284}
285
286/* Return cable type of attached or detached accessories */
287static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
288{
289 unsigned int cable_type = -1, adc, dev_type1;
290 int ret;
291
292 /* Read ADC value according to external cable or button */
293 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
294 if (ret) {
295 dev_err(info->dev, "failed to read ADC register\n");
296 return ret;
297 }
298
299 /*
300 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
301 * connected with to MUIC device.
302 */
303 cable_type &= SM5502_REG_ADC_MASK;
304 if (cable_type == SM5502_MUIC_ADC_GROUND)
305 return SM5502_MUIC_ADC_GROUND;
306
307 switch (cable_type) {
308 case SM5502_MUIC_ADC_GROUND:
309 case SM5502_MUIC_ADC_SEND_END_BUTTON:
310 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
311 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
312 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
313 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
314 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
315 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
316 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
317 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
318 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
319 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
320 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
321 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
322 case SM5502_MUIC_ADC_RESERVED_ACC_1:
323 case SM5502_MUIC_ADC_RESERVED_ACC_2:
324 case SM5502_MUIC_ADC_RESERVED_ACC_3:
325 case SM5502_MUIC_ADC_RESERVED_ACC_4:
326 case SM5502_MUIC_ADC_RESERVED_ACC_5:
327 case SM5502_MUIC_ADC_AUDIO_TYPE2:
328 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
329 case SM5502_MUIC_ADC_TTY_CONVERTER:
330 case SM5502_MUIC_ADC_UART_CABLE:
331 case SM5502_MUIC_ADC_TYPE1_CHARGER:
332 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
333 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
334 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
335 case SM5502_MUIC_ADC_TYPE2_CHARGER:
336 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
337 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
338 break;
339 case SM5502_MUIC_ADC_AUDIO_TYPE1:
340 /*
341 * Check whether cable type is
342 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
343 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
344 * by using Button event.
345 */
346 break;
347 case SM5502_MUIC_ADC_OPEN:
348 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
349 &dev_type1);
350 if (ret) {
351 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
352 return ret;
353 }
354
355 switch (dev_type1) {
356 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
357 cable_type = SM5502_MUIC_ADC_OPEN_USB;
358 break;
359 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
360 cable_type = SM5502_MUIC_ADC_OPEN_TA;
361 break;
362 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
363 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
364 break;
365 default:
366 dev_dbg(info->dev,
367 "cannot identify the cable type: adc(0x%x) "
368 "dev_type1(0x%x)\n", adc, dev_type1);
369 return -EINVAL;
370 };
371 break;
372 default:
373 dev_err(info->dev,
374 "failed to identify the cable type: adc(0x%x)\n", adc);
375 return -EINVAL;
376 };
377
378 return cable_type;
379}
380
381static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
382 bool attached)
383{
384 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
385 const char **cable_names = info->edev->supported_cable;
386 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
387 unsigned int con_sw = DM_DP_SWITCH_OPEN;
388 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
389 unsigned int idx = 0;
390 int ret;
391
392 if (!cable_names)
393 return 0;
394
395 /* Get the type of attached or detached cable */
396 if (attached)
397 cable_type = sm5502_muic_get_cable_type(info);
398 else if (!attached)
399 cable_type = prev_cable_type;
400 prev_cable_type = cable_type;
401
402 switch (cable_type) {
403 case SM5502_MUIC_ADC_OPEN_USB:
404 idx = EXTCON_CABLE_USB;
405 con_sw = DM_DP_SWITCH_USB;
406 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
407 break;
408 case SM5502_MUIC_ADC_OPEN_TA:
409 idx = EXTCON_CABLE_TA;
410 con_sw = DM_DP_SWITCH_OPEN;
411 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
412 break;
413 case SM5502_MUIC_ADC_OPEN_USB_OTG:
414 idx = EXTCON_CABLE_USB_HOST;
415 con_sw = DM_DP_SWITCH_USB;
416 vbus_sw = VBUSIN_SWITCH_OPEN;
417 break;
418 default:
419 dev_dbg(info->dev,
420 "cannot handle this cable_type (0x%x)\n", cable_type);
421 return 0;
422 };
423
424 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
425 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
426 if (ret < 0)
427 return ret;
428
429 /* Change the state of external accessory */
430 extcon_set_cable_state(info->edev, cable_names[idx], attached);
431
432 return 0;
433}
434
435static void sm5502_muic_irq_work(struct work_struct *work)
436{
437 struct sm5502_muic_info *info = container_of(work,
438 struct sm5502_muic_info, irq_work);
439 int ret = 0;
440
441 if (!info->edev)
442 return;
443
444 mutex_lock(&info->mutex);
445
446 /* Detect attached or detached cables */
447 if (info->irq_attach) {
448 ret = sm5502_muic_cable_handler(info, true);
449 info->irq_attach = false;
450 }
451 if (info->irq_detach) {
452 ret = sm5502_muic_cable_handler(info, false);
453 info->irq_detach = false;
454 }
455
456 if (ret < 0)
457 dev_err(info->dev, "failed to handle MUIC interrupt\n");
458
459 mutex_unlock(&info->mutex);
460
461 return;
462}
463
464/*
465 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
466 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
467 */
468static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
469{
470 switch (irq_type) {
471 case SM5502_IRQ_INT1_ATTACH:
472 info->irq_attach = true;
473 break;
474 case SM5502_IRQ_INT1_DETACH:
475 info->irq_detach = true;
476 break;
477 case SM5502_IRQ_INT1_KP:
478 case SM5502_IRQ_INT1_LKP:
479 case SM5502_IRQ_INT1_LKR:
480 case SM5502_IRQ_INT1_OVP_EVENT:
481 case SM5502_IRQ_INT1_OCP_EVENT:
482 case SM5502_IRQ_INT1_OVP_OCP_DIS:
483 case SM5502_IRQ_INT2_VBUS_DET:
484 case SM5502_IRQ_INT2_REV_ACCE:
485 case SM5502_IRQ_INT2_ADC_CHG:
486 case SM5502_IRQ_INT2_STUCK_KEY:
487 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
488 case SM5502_IRQ_INT2_MHL:
489 default:
490 break;
491 }
492
493 return 0;
494}
495
496static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
497{
498 struct sm5502_muic_info *info = data;
499 int i, irq_type = -1, ret;
500
501 for (i = 0; i < info->num_muic_irqs; i++)
502 if (irq == info->muic_irqs[i].virq)
503 irq_type = info->muic_irqs[i].irq;
504
505 ret = sm5502_parse_irq(info, irq_type);
506 if (ret < 0) {
507 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
508 irq_type);
509 return IRQ_HANDLED;
510 }
511 schedule_work(&info->irq_work);
512
513 return IRQ_HANDLED;
514}
515
516static void sm5502_muic_detect_cable_wq(struct work_struct *work)
517{
518 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
519 struct sm5502_muic_info, wq_detcable);
520 int ret;
521
522 /* Notify the state of connector cable or not */
523 ret = sm5502_muic_cable_handler(info, true);
524 if (ret < 0)
525 dev_warn(info->dev, "failed to detect cable state\n");
526}
527
528static void sm5502_init_dev_type(struct sm5502_muic_info *info)
529{
530 unsigned int reg_data, vendor_id, version_id;
531 int i, ret;
532
533 /* To test I2C, Print version_id and vendor_id of SM5502 */
534 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
535 if (ret) {
536 dev_err(info->dev,
537 "failed to read DEVICE_ID register: %d\n", ret);
538 return;
539 }
540
541 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
542 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
543 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
544 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
545
546 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
547 version_id, vendor_id);
548
549 /* Initiazle the register of SM5502 device to bring-up */
550 for (i = 0; i < info->num_reg_data; i++) {
551 unsigned int val = 0;
552
553 if (!info->reg_data[i].invert)
554 val |= ~info->reg_data[i].val;
555 else
556 val = info->reg_data[i].val;
557 regmap_write(info->regmap, info->reg_data[i].reg, val);
558 }
559}
560
561static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
562 const struct i2c_device_id *id)
563{
564 struct device_node *np = i2c->dev.of_node;
565 struct sm5502_muic_info *info;
566 int i, ret, irq_flags;
567
568 if (!np)
569 return -EINVAL;
570
571 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
572 if (!info)
573 return -ENOMEM;
574 i2c_set_clientdata(i2c, info);
575
576 info->dev = &i2c->dev;
577 info->i2c = i2c;
578 info->irq = i2c->irq;
579 info->muic_irqs = sm5502_muic_irqs;
580 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
581 info->reg_data = sm5502_reg_data;
582 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
583
584 mutex_init(&info->mutex);
585
586 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
587
588 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
589 if (IS_ERR(info->regmap)) {
590 ret = PTR_ERR(info->regmap);
591 dev_err(info->dev, "failed to allocate register map: %d\n",
592 ret);
593 return ret;
594 }
595
596 /* Support irq domain for SM5502 MUIC device */
597 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
598 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
599 &sm5502_muic_irq_chip, &info->irq_data);
600 if (ret != 0) {
601 dev_err(info->dev, "failed to request IRQ %d: %d\n",
602 info->irq, ret);
603 return ret;
604 }
605
606 for (i = 0; i < info->num_muic_irqs; i++) {
607 struct muic_irq *muic_irq = &info->muic_irqs[i];
608 unsigned int virq = 0;
609
610 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
611 if (virq <= 0)
612 return -EINVAL;
613 muic_irq->virq = virq;
614
615 ret = devm_request_threaded_irq(info->dev, virq, NULL,
616 sm5502_muic_irq_handler,
617 IRQF_NO_SUSPEND,
618 muic_irq->name, info);
619 if (ret) {
620 dev_err(info->dev, "failed: irq request (IRQ: %d,"
621 " error :%d)\n", muic_irq->irq, ret);
622 return ret;
623 }
624 }
625
626 /* Allocate extcon device */
627 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
628 if (IS_ERR(info->edev)) {
629 dev_err(info->dev, "failed to allocate memory for extcon\n");
630 return -ENOMEM;
631 }
632 info->edev->name = np->name;
633
634 /* Register extcon device */
635 ret = devm_extcon_dev_register(info->dev, info->edev);
636 if (ret) {
637 dev_err(info->dev, "failed to register extcon device\n");
638 return ret;
639 }
640
641 /*
642 * Detect accessory after completing the initialization of platform
643 *
644 * - Use delayed workqueue to detect cable state and then
645 * notify cable state to notifiee/platform through uevent.
646 * After completing the booting of platform, the extcon provider
647 * driver should notify cable state to upper layer.
648 */
649 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
650 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
651 msecs_to_jiffies(DELAY_MS_DEFAULT));
652
653 /* Initialize SM5502 device and print vendor id and version id */
654 sm5502_init_dev_type(info);
655
656 return 0;
657}
658
659static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
660{
661 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
662
663 regmap_del_irq_chip(info->irq, info->irq_data);
664
665 return 0;
666}
667
668static struct of_device_id sm5502_dt_match[] = {
669 { .compatible = "siliconmitus,sm5502-muic" },
670 { },
671};
672
673#ifdef CONFIG_PM_SLEEP
674static int sm5502_muic_suspend(struct device *dev)
675{
676 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
677 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
678
679 enable_irq_wake(info->irq);
680
681 return 0;
682}
683
684static int sm5502_muic_resume(struct device *dev)
685{
686 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
687 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
688
689 disable_irq_wake(info->irq);
690
691 return 0;
692}
693#endif
694
695static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
696 sm5502_muic_suspend, sm5502_muic_resume);
697
698static const struct i2c_device_id sm5502_i2c_id[] = {
699 { "sm5502", TYPE_SM5502 },
700 { }
701};
702MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
703
704static struct i2c_driver sm5502_muic_i2c_driver = {
705 .driver = {
706 .name = "sm5502",
707 .owner = THIS_MODULE,
708 .pm = &sm5502_muic_pm_ops,
709 .of_match_table = sm5502_dt_match,
710 },
711 .probe = sm5022_muic_i2c_probe,
712 .remove = sm5502_muic_i2c_remove,
713 .id_table = sm5502_i2c_id,
714};
715
716static int __init sm5502_muic_i2c_init(void)
717{
718 return i2c_add_driver(&sm5502_muic_i2c_driver);
719}
720subsys_initcall(sm5502_muic_i2c_init);
721
722MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
723MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
724MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-10 22:34:51 -0400