1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // MCP16502 PMIC driver
4 //
5 // Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries
6 //
7 // Author: Andrei Stefanescu <andrei.stefanescu@microchip.com>
8 //
9 // Inspired from tps65086-regulator.c
10
11 #include <linux/gpio.h>
12 #include <linux/i2c.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/of.h>
17 #include <linux/regmap.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/suspend.h>
20 #include <linux/gpio/consumer.h>
21
22 #define VDD_LOW_SEL 0x0D
23 #define VDD_HIGH_SEL 0x3F
24
25 #define MCP16502_FLT BIT(7)
26 #define MCP16502_DVSR GENMASK(3, 2)
27 #define MCP16502_ENS BIT(0)
28
29 /*
30 * The PMIC has four sets of registers corresponding to four power modes:
31 * Performance, Active, Low-power, Hibernate.
32 *
33 * Registers:
34 * Each regulator has a register for each power mode. To access a register
35 * for a specific regulator and mode BASE_* and OFFSET_* need to be added.
36 *
37 * Operating modes:
38 * In order for the PMIC to transition to operating modes it has to be
39 * controlled via GPIO lines called LPM and HPM.
40 *
41 * The registers are fully configurable such that you can put all regulators in
42 * a low-power state while the PMIC is in Active mode. They are supposed to be
43 * configured at startup and then simply transition to/from a global low-power
44 * state by setting the GPIO lpm pin high/low.
45 *
46 * This driver keeps the PMIC in Active mode, Low-power state is set for the
47 * regulators by enabling/disabling operating mode (FPWM or Auto PFM).
48 *
49 * The PMIC's Low-power and Hibernate modes are used during standby/suspend.
50 * To enter standby/suspend the PMIC will go to Low-power mode. From there, it
51 * will transition to Hibernate when the PWRHLD line is set to low by the MPU.
52 */
53
54 /*
55 * This function is useful for iterating over all regulators and accessing their
56 * registers in a generic way or accessing a regulator device by its id.
57 */
58 #define MCP16502_REG_BASE(i, r) ((((i) + 1) << 4) + MCP16502_REG_##r)
59 #define MCP16502_STAT_BASE(i) ((i) + 5)
60
61 #define MCP16502_OPMODE_ACTIVE REGULATOR_MODE_NORMAL
62 #define MCP16502_OPMODE_LPM REGULATOR_MODE_IDLE
63 #define MCP16502_OPMODE_HIB REGULATOR_MODE_STANDBY
64
65 #define MCP16502_MODE_AUTO_PFM 0
66 #define MCP16502_MODE_FPWM BIT(6)
67
68 #define MCP16502_VSEL 0x3F
69 #define MCP16502_EN BIT(7)
70 #define MCP16502_MODE BIT(6)
71
72 #define MCP16502_MIN_REG 0x0
73 #define MCP16502_MAX_REG 0x65
74
75 /**
76 * enum mcp16502_reg - MCP16502 regulators's registers
77 * @MCP16502_REG_A: active state register
78 * @MCP16502_REG_LPM: low power mode state register
79 * @MCP16502_REG_HIB: hibernate state register
80 * @MCP16502_REG_SEQ: startup sequence register
81 * @MCP16502_REG_CFG: configuration register
82 */
83 enum mcp16502_reg {
84 MCP16502_REG_A,
85 MCP16502_REG_LPM,
86 MCP16502_REG_HIB,
87 MCP16502_REG_HPM,
88 MCP16502_REG_SEQ,
89 MCP16502_REG_CFG,
90 };
91
92 /* Ramp delay (uV/us) for buck1, ldo1, ldo2. */
93 static const int mcp16502_ramp_b1l12[] = { 6250, 3125, 2083, 1563 };
94
95 /* Ramp delay (uV/us) for buck2, buck3, buck4. */
96 static const int mcp16502_ramp_b234[] = { 3125, 1563, 1042, 781 };
97
mcp16502_of_map_mode(unsigned int mode)98 static unsigned int mcp16502_of_map_mode(unsigned int mode)
99 {
100 if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)
101 return mode;
102
103 return REGULATOR_MODE_INVALID;
104 }
105
106 #define MCP16502_REGULATOR(_name, _id, _ranges, _ops) \
107 [_id] = { \
108 .name = _name, \
109 .regulators_node = of_match_ptr("regulators"), \
110 .id = _id, \
111 .ops = &(_ops), \
112 .type = REGULATOR_VOLTAGE, \
113 .owner = THIS_MODULE, \
114 .n_voltages = MCP16502_VSEL + 1, \
115 .linear_ranges = _ranges, \
116 .linear_min_sel = VDD_LOW_SEL, \
117 .n_linear_ranges = ARRAY_SIZE(_ranges), \
118 .of_match = of_match_ptr(_name), \
119 .of_map_mode = mcp16502_of_map_mode, \
120 .vsel_reg = (((_id) + 1) << 4), \
121 .vsel_mask = MCP16502_VSEL, \
122 .enable_reg = (((_id) + 1) << 4), \
123 .enable_mask = MCP16502_EN, \
124 }
125
126 enum {
127 BUCK1 = 0,
128 BUCK2,
129 BUCK3,
130 BUCK4,
131 LDO1,
132 LDO2,
133 NUM_REGULATORS
134 };
135
136 /*
137 * struct mcp16502 - PMIC representation
138 * @lpm: LPM GPIO descriptor
139 */
140 struct mcp16502 {
141 struct gpio_desc *lpm;
142 };
143
144 /*
145 * mcp16502_gpio_set_mode() - set the GPIO corresponding value
146 *
147 * Used to prepare transitioning into hibernate or resuming from it.
148 */
mcp16502_gpio_set_mode(struct mcp16502 * mcp,int mode)149 static void mcp16502_gpio_set_mode(struct mcp16502 *mcp, int mode)
150 {
151 switch (mode) {
152 case MCP16502_OPMODE_ACTIVE:
153 gpiod_set_value(mcp->lpm, 0);
154 break;
155 case MCP16502_OPMODE_LPM:
156 case MCP16502_OPMODE_HIB:
157 gpiod_set_value(mcp->lpm, 1);
158 break;
159 default:
160 pr_err("%s: %d invalid\n", __func__, mode);
161 }
162 }
163
164 /*
165 * mcp16502_get_reg() - get the PMIC's state configuration register for opmode
166 *
167 * @rdev: the regulator whose register we are searching
168 * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate
169 */
mcp16502_get_state_reg(struct regulator_dev * rdev,int opmode)170 static int mcp16502_get_state_reg(struct regulator_dev *rdev, int opmode)
171 {
172 switch (opmode) {
173 case MCP16502_OPMODE_ACTIVE:
174 return MCP16502_REG_BASE(rdev_get_id(rdev), A);
175 case MCP16502_OPMODE_LPM:
176 return MCP16502_REG_BASE(rdev_get_id(rdev), LPM);
177 case MCP16502_OPMODE_HIB:
178 return MCP16502_REG_BASE(rdev_get_id(rdev), HIB);
179 default:
180 return -EINVAL;
181 }
182 }
183
184 /*
185 * mcp16502_get_mode() - return the current operating mode of a regulator
186 *
187 * Note: all functions that are not part of entering/exiting standby/suspend
188 * use the Active mode registers.
189 *
190 * Note: this is different from the PMIC's operatig mode, it is the
191 * MODE bit from the regulator's register.
192 */
mcp16502_get_mode(struct regulator_dev * rdev)193 static unsigned int mcp16502_get_mode(struct regulator_dev *rdev)
194 {
195 unsigned int val;
196 int ret, reg;
197
198 reg = mcp16502_get_state_reg(rdev, MCP16502_OPMODE_ACTIVE);
199 if (reg < 0)
200 return reg;
201
202 ret = regmap_read(rdev->regmap, reg, &val);
203 if (ret)
204 return ret;
205
206 switch (val & MCP16502_MODE) {
207 case MCP16502_MODE_FPWM:
208 return REGULATOR_MODE_NORMAL;
209 case MCP16502_MODE_AUTO_PFM:
210 return REGULATOR_MODE_IDLE;
211 default:
212 return REGULATOR_MODE_INVALID;
213 }
214 }
215
216 /*
217 * _mcp16502_set_mode() - helper for set_mode and set_suspend_mode
218 *
219 * @rdev: the regulator for which we are setting the mode
220 * @mode: the regulator's mode (the one from MODE bit)
221 * @opmode: the PMIC's operating mode: Active/Low-power/Hibernate
222 */
_mcp16502_set_mode(struct regulator_dev * rdev,unsigned int mode,unsigned int op_mode)223 static int _mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode,
224 unsigned int op_mode)
225 {
226 int val;
227 int reg;
228
229 reg = mcp16502_get_state_reg(rdev, op_mode);
230 if (reg < 0)
231 return reg;
232
233 switch (mode) {
234 case REGULATOR_MODE_NORMAL:
235 val = MCP16502_MODE_FPWM;
236 break;
237 case REGULATOR_MODE_IDLE:
238 val = MCP16502_MODE_AUTO_PFM;
239 break;
240 default:
241 return -EINVAL;
242 }
243
244 reg = regmap_update_bits(rdev->regmap, reg, MCP16502_MODE, val);
245 return reg;
246 }
247
248 /*
249 * mcp16502_set_mode() - regulator_ops set_mode
250 */
mcp16502_set_mode(struct regulator_dev * rdev,unsigned int mode)251 static int mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode)
252 {
253 return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_ACTIVE);
254 }
255
256 /*
257 * mcp16502_get_status() - regulator_ops get_status
258 */
mcp16502_get_status(struct regulator_dev * rdev)259 static int mcp16502_get_status(struct regulator_dev *rdev)
260 {
261 int ret;
262 unsigned int val;
263
264 ret = regmap_read(rdev->regmap, MCP16502_STAT_BASE(rdev_get_id(rdev)),
265 &val);
266 if (ret)
267 return ret;
268
269 if (val & MCP16502_FLT)
270 return REGULATOR_STATUS_ERROR;
271 else if (val & MCP16502_ENS)
272 return REGULATOR_STATUS_ON;
273 else if (!(val & MCP16502_ENS))
274 return REGULATOR_STATUS_OFF;
275
276 return REGULATOR_STATUS_UNDEFINED;
277 }
278
mcp16502_set_voltage_time_sel(struct regulator_dev * rdev,unsigned int old_sel,unsigned int new_sel)279 static int mcp16502_set_voltage_time_sel(struct regulator_dev *rdev,
280 unsigned int old_sel,
281 unsigned int new_sel)
282 {
283 static const u8 us_ramp[] = { 8, 16, 24, 32 };
284 int id = rdev_get_id(rdev);
285 unsigned int uV_delta, val;
286 int ret;
287
288 ret = regmap_read(rdev->regmap, MCP16502_REG_BASE(id, CFG), &val);
289 if (ret)
290 return ret;
291
292 val = (val & MCP16502_DVSR) >> 2;
293 uV_delta = abs(new_sel * rdev->desc->linear_ranges->step -
294 old_sel * rdev->desc->linear_ranges->step);
295 switch (id) {
296 case BUCK1:
297 case LDO1:
298 case LDO2:
299 ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
300 mcp16502_ramp_b1l12[val]);
301 break;
302
303 case BUCK2:
304 case BUCK3:
305 case BUCK4:
306 ret = DIV_ROUND_CLOSEST(uV_delta * us_ramp[val],
307 mcp16502_ramp_b234[val]);
308 break;
309
310 default:
311 return -EINVAL;
312 }
313
314 return ret;
315 }
316
mcp16502_set_ramp_delay(struct regulator_dev * rdev,int ramp_delay)317 static int mcp16502_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
318 {
319 const int *ramp;
320 int id = rdev_get_id(rdev);
321 unsigned int i, size;
322
323 switch (id) {
324 case BUCK1:
325 case LDO1:
326 case LDO2:
327 ramp = mcp16502_ramp_b1l12;
328 size = ARRAY_SIZE(mcp16502_ramp_b1l12);
329 break;
330
331 case BUCK2:
332 case BUCK3:
333 case BUCK4:
334 ramp = mcp16502_ramp_b234;
335 size = ARRAY_SIZE(mcp16502_ramp_b234);
336 break;
337
338 default:
339 return -EINVAL;
340 }
341
342 for (i = 0; i < size; i++) {
343 if (ramp[i] == ramp_delay)
344 break;
345 }
346 if (i == size)
347 return -EINVAL;
348
349 return regmap_update_bits(rdev->regmap, MCP16502_REG_BASE(id, CFG),
350 MCP16502_DVSR, (i << 2));
351 }
352
353 #ifdef CONFIG_SUSPEND
354 /*
355 * mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC
356 * mode
357 */
mcp16502_suspend_get_target_reg(struct regulator_dev * rdev)358 static int mcp16502_suspend_get_target_reg(struct regulator_dev *rdev)
359 {
360 switch (pm_suspend_target_state) {
361 case PM_SUSPEND_STANDBY:
362 return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_LPM);
363 case PM_SUSPEND_ON:
364 case PM_SUSPEND_MEM:
365 return mcp16502_get_state_reg(rdev, MCP16502_OPMODE_HIB);
366 default:
367 dev_err(&rdev->dev, "invalid suspend target: %d\n",
368 pm_suspend_target_state);
369 }
370
371 return -EINVAL;
372 }
373
374 /*
375 * mcp16502_set_suspend_voltage() - regulator_ops set_suspend_voltage
376 */
mcp16502_set_suspend_voltage(struct regulator_dev * rdev,int uV)377 static int mcp16502_set_suspend_voltage(struct regulator_dev *rdev, int uV)
378 {
379 int sel = regulator_map_voltage_linear_range(rdev, uV, uV);
380 int reg = mcp16502_suspend_get_target_reg(rdev);
381
382 if (sel < 0)
383 return sel;
384
385 if (reg < 0)
386 return reg;
387
388 return regmap_update_bits(rdev->regmap, reg, MCP16502_VSEL, sel);
389 }
390
391 /*
392 * mcp16502_set_suspend_mode() - regulator_ops set_suspend_mode
393 */
mcp16502_set_suspend_mode(struct regulator_dev * rdev,unsigned int mode)394 static int mcp16502_set_suspend_mode(struct regulator_dev *rdev,
395 unsigned int mode)
396 {
397 switch (pm_suspend_target_state) {
398 case PM_SUSPEND_STANDBY:
399 return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_LPM);
400 case PM_SUSPEND_ON:
401 case PM_SUSPEND_MEM:
402 return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_HIB);
403 default:
404 dev_err(&rdev->dev, "invalid suspend target: %d\n",
405 pm_suspend_target_state);
406 }
407
408 return -EINVAL;
409 }
410
411 /*
412 * mcp16502_set_suspend_enable() - regulator_ops set_suspend_enable
413 */
mcp16502_set_suspend_enable(struct regulator_dev * rdev)414 static int mcp16502_set_suspend_enable(struct regulator_dev *rdev)
415 {
416 int reg = mcp16502_suspend_get_target_reg(rdev);
417
418 if (reg < 0)
419 return reg;
420
421 return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, MCP16502_EN);
422 }
423
424 /*
425 * mcp16502_set_suspend_disable() - regulator_ops set_suspend_disable
426 */
mcp16502_set_suspend_disable(struct regulator_dev * rdev)427 static int mcp16502_set_suspend_disable(struct regulator_dev *rdev)
428 {
429 int reg = mcp16502_suspend_get_target_reg(rdev);
430
431 if (reg < 0)
432 return reg;
433
434 return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, 0);
435 }
436 #endif /* CONFIG_SUSPEND */
437
438 static const struct regulator_ops mcp16502_buck_ops = {
439 .list_voltage = regulator_list_voltage_linear_range,
440 .map_voltage = regulator_map_voltage_linear_range,
441 .get_voltage_sel = regulator_get_voltage_sel_regmap,
442 .set_voltage_sel = regulator_set_voltage_sel_regmap,
443 .enable = regulator_enable_regmap,
444 .disable = regulator_disable_regmap,
445 .is_enabled = regulator_is_enabled_regmap,
446 .get_status = mcp16502_get_status,
447 .set_voltage_time_sel = mcp16502_set_voltage_time_sel,
448 .set_ramp_delay = mcp16502_set_ramp_delay,
449
450 .set_mode = mcp16502_set_mode,
451 .get_mode = mcp16502_get_mode,
452
453 #ifdef CONFIG_SUSPEND
454 .set_suspend_voltage = mcp16502_set_suspend_voltage,
455 .set_suspend_mode = mcp16502_set_suspend_mode,
456 .set_suspend_enable = mcp16502_set_suspend_enable,
457 .set_suspend_disable = mcp16502_set_suspend_disable,
458 #endif /* CONFIG_SUSPEND */
459 };
460
461 /*
462 * LDOs cannot change operating modes.
463 */
464 static const struct regulator_ops mcp16502_ldo_ops = {
465 .list_voltage = regulator_list_voltage_linear_range,
466 .map_voltage = regulator_map_voltage_linear_range,
467 .get_voltage_sel = regulator_get_voltage_sel_regmap,
468 .set_voltage_sel = regulator_set_voltage_sel_regmap,
469 .enable = regulator_enable_regmap,
470 .disable = regulator_disable_regmap,
471 .is_enabled = regulator_is_enabled_regmap,
472 .get_status = mcp16502_get_status,
473 .set_voltage_time_sel = mcp16502_set_voltage_time_sel,
474 .set_ramp_delay = mcp16502_set_ramp_delay,
475
476 #ifdef CONFIG_SUSPEND
477 .set_suspend_voltage = mcp16502_set_suspend_voltage,
478 .set_suspend_enable = mcp16502_set_suspend_enable,
479 .set_suspend_disable = mcp16502_set_suspend_disable,
480 #endif /* CONFIG_SUSPEND */
481 };
482
483 static const struct of_device_id mcp16502_ids[] = {
484 { .compatible = "microchip,mcp16502", },
485 {}
486 };
487 MODULE_DEVICE_TABLE(of, mcp16502_ids);
488
489 static const struct linear_range b1l12_ranges[] = {
490 REGULATOR_LINEAR_RANGE(1200000, VDD_LOW_SEL, VDD_HIGH_SEL, 50000),
491 };
492
493 static const struct linear_range b234_ranges[] = {
494 REGULATOR_LINEAR_RANGE(600000, VDD_LOW_SEL, VDD_HIGH_SEL, 25000),
495 };
496
497 static const struct regulator_desc mcp16502_desc[] = {
498 /* MCP16502_REGULATOR(_name, _id, ranges, regulator_ops) */
499 MCP16502_REGULATOR("VDD_IO", BUCK1, b1l12_ranges, mcp16502_buck_ops),
500 MCP16502_REGULATOR("VDD_DDR", BUCK2, b234_ranges, mcp16502_buck_ops),
501 MCP16502_REGULATOR("VDD_CORE", BUCK3, b234_ranges, mcp16502_buck_ops),
502 MCP16502_REGULATOR("VDD_OTHER", BUCK4, b234_ranges, mcp16502_buck_ops),
503 MCP16502_REGULATOR("LDO1", LDO1, b1l12_ranges, mcp16502_ldo_ops),
504 MCP16502_REGULATOR("LDO2", LDO2, b1l12_ranges, mcp16502_ldo_ops)
505 };
506
507 static const struct regmap_range mcp16502_ranges[] = {
508 regmap_reg_range(MCP16502_MIN_REG, MCP16502_MAX_REG)
509 };
510
511 static const struct regmap_access_table mcp16502_yes_reg_table = {
512 .yes_ranges = mcp16502_ranges,
513 .n_yes_ranges = ARRAY_SIZE(mcp16502_ranges),
514 };
515
516 static const struct regmap_config mcp16502_regmap_config = {
517 .reg_bits = 8,
518 .val_bits = 8,
519 .max_register = MCP16502_MAX_REG,
520 .cache_type = REGCACHE_NONE,
521 .rd_table = &mcp16502_yes_reg_table,
522 .wr_table = &mcp16502_yes_reg_table,
523 };
524
mcp16502_probe(struct i2c_client * client,const struct i2c_device_id * id)525 static int mcp16502_probe(struct i2c_client *client,
526 const struct i2c_device_id *id)
527 {
528 struct regulator_config config = { };
529 struct regulator_dev *rdev;
530 struct device *dev;
531 struct mcp16502 *mcp;
532 struct regmap *rmap;
533 int i, ret;
534
535 dev = &client->dev;
536 config.dev = dev;
537
538 mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL);
539 if (!mcp)
540 return -ENOMEM;
541
542 rmap = devm_regmap_init_i2c(client, &mcp16502_regmap_config);
543 if (IS_ERR(rmap)) {
544 ret = PTR_ERR(rmap);
545 dev_err(dev, "regmap init failed: %d\n", ret);
546 return ret;
547 }
548
549 i2c_set_clientdata(client, mcp);
550 config.regmap = rmap;
551 config.driver_data = mcp;
552
553 mcp->lpm = devm_gpiod_get_optional(dev, "lpm", GPIOD_OUT_LOW);
554 if (IS_ERR(mcp->lpm)) {
555 dev_err(dev, "failed to get lpm pin: %ld\n", PTR_ERR(mcp->lpm));
556 return PTR_ERR(mcp->lpm);
557 }
558
559 for (i = 0; i < NUM_REGULATORS; i++) {
560 rdev = devm_regulator_register(dev, &mcp16502_desc[i], &config);
561 if (IS_ERR(rdev)) {
562 dev_err(dev,
563 "failed to register %s regulator %ld\n",
564 mcp16502_desc[i].name, PTR_ERR(rdev));
565 return PTR_ERR(rdev);
566 }
567 }
568
569 mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);
570
571 return 0;
572 }
573
574 #ifdef CONFIG_PM_SLEEP
mcp16502_suspend_noirq(struct device * dev)575 static int mcp16502_suspend_noirq(struct device *dev)
576 {
577 struct i2c_client *client = to_i2c_client(dev);
578 struct mcp16502 *mcp = i2c_get_clientdata(client);
579
580 mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_LPM);
581
582 return 0;
583 }
584
mcp16502_resume_noirq(struct device * dev)585 static int mcp16502_resume_noirq(struct device *dev)
586 {
587 struct i2c_client *client = to_i2c_client(dev);
588 struct mcp16502 *mcp = i2c_get_clientdata(client);
589
590 mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);
591
592 return 0;
593 }
594 #endif
595
596 #ifdef CONFIG_PM
597 static const struct dev_pm_ops mcp16502_pm_ops = {
598 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend_noirq,
599 mcp16502_resume_noirq)
600 };
601 #endif
602 static const struct i2c_device_id mcp16502_i2c_id[] = {
603 { "mcp16502", 0 },
604 { }
605 };
606 MODULE_DEVICE_TABLE(i2c, mcp16502_i2c_id);
607
608 static struct i2c_driver mcp16502_drv = {
609 .probe = mcp16502_probe,
610 .driver = {
611 .name = "mcp16502-regulator",
612 .of_match_table = of_match_ptr(mcp16502_ids),
613 #ifdef CONFIG_PM
614 .pm = &mcp16502_pm_ops,
615 #endif
616 },
617 .id_table = mcp16502_i2c_id,
618 };
619
620 module_i2c_driver(mcp16502_drv);
621
622 MODULE_LICENSE("GPL v2");
623 MODULE_DESCRIPTION("MCP16502 PMIC driver");
624 MODULE_AUTHOR("Andrei Stefanescu andrei.stefanescu@microchip.com");
625