1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2012-2015 Samsung Electronics
5 * Rajeshwari Shinde <rajeshwari.s@samsung.com>
6 * Przemyslaw Marczak <p.marczak@samsung.com>
14 #include <power/pmic.h>
15 #include <power/regulator.h>
16 #include <power/max77686_pmic.h>
18 #define MODE(_id, _val, _name) { \
20 .register_value = _val, \
24 /* LDO: 1,3,4,5,9,17,18,19,20,21,22,23,24,26,26,27 */
25 static struct dm_regulator_mode max77686_ldo_mode_standby1[] = {
26 MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
27 MODE(OPMODE_LPM, MAX77686_LDO_MODE_LPM, "LPM"),
28 MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
29 MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
32 /* LDO: 2,6,7,8,10,11,12,14,15,16 */
33 static struct dm_regulator_mode max77686_ldo_mode_standby2[] = {
34 MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
35 MODE(OPMODE_STANDBY, MAX77686_LDO_MODE_STANDBY, "ON/OFF"),
36 MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
37 MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
41 static struct dm_regulator_mode max77686_buck_mode_standby[] = {
42 MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
43 MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
44 MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
48 static struct dm_regulator_mode max77686_buck_mode_lpm[] = {
49 MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
50 MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
51 MODE(OPMODE_LPM, MAX77686_BUCK_MODE_LPM, "LPM"),
52 MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
56 static struct dm_regulator_mode max77686_buck_mode_onoff[] = {
57 MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
58 MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
61 static const char max77686_buck_ctrl[] = {
62 0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
65 static const char max77686_buck_out[] = {
66 0xff, 0x11, 0x14, 0x1e, 0x28, 0x31, 0x33, 0x35, 0x37, 0x39
69 static int max77686_buck_volt2hex(int buck, int uV)
78 /* hex = (uV - 600000) / 12500; */
79 hex = (uV - MAX77686_BUCK_UV_LMIN) / MAX77686_BUCK_UV_LSTEP;
80 hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
84 * hex = (uV - 750000) / 50000. We assume that dynamic voltage
85 * scaling via GPIOs is not enabled and don't support that.
86 * If this is enabled then the driver will need to take that
87 * into account and check different registers depending on
88 * the current setting. See the datasheet for details.
90 hex = (uV - MAX77686_BUCK_UV_HMIN) / MAX77686_BUCK_UV_HSTEP;
91 hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
95 if (hex >= 0 && hex <= hex_max)
98 pr_err("Value: %d uV is wrong for BUCK%d", uV, buck);
102 static int max77686_buck_hex2volt(int buck, int hex)
114 hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
118 /* uV = hex * 12500 + 600000; */
119 uV = hex * MAX77686_BUCK_UV_LSTEP + MAX77686_BUCK_UV_LMIN;
122 hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
126 /* uV = hex * 50000 + 750000; */
127 uV = hex * MAX77686_BUCK_UV_HSTEP + MAX77686_BUCK_UV_HMIN;
134 pr_err("Value: %#x is wrong for BUCK%d", hex, buck);
138 static int max77686_ldo_volt2hex(int ldo, int uV)
149 hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_LSTEP;
150 /* hex = (uV - 800000) / 25000; */
153 hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_HSTEP;
154 /* hex = (uV - 800000) / 50000; */
157 if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
160 pr_err("Value: %d uV is wrong for LDO%d", uV, ldo);
164 static int max77686_ldo_hex2volt(int ldo, int hex)
168 if (hex > MAX77686_LDO_VOLT_MAX_HEX)
178 /* uV = hex * 25000 + 800000; */
179 uV = hex * MAX77686_LDO_UV_LSTEP + MAX77686_LDO_UV_MIN;
182 /* uV = hex * 50000 + 800000; */
183 uV = hex * MAX77686_LDO_UV_HSTEP + MAX77686_LDO_UV_MIN;
189 pr_err("Value: %#x is wrong for ldo%d", hex, ldo);
193 static int max77686_ldo_hex2mode(int ldo, int hex)
195 if (hex > MAX77686_LDO_MODE_MASK)
199 case MAX77686_LDO_MODE_OFF:
201 case MAX77686_LDO_MODE_LPM: /* == MAX77686_LDO_MODE_STANDBY: */
202 /* The same mode values but different meaning for each ldo */
214 return OPMODE_STANDBY;
218 case MAX77686_LDO_MODE_STANDBY_LPM:
219 return OPMODE_STANDBY_LPM;
220 case MAX77686_LDO_MODE_ON:
227 static int max77686_buck_hex2mode(int buck, int hex)
229 if (hex > MAX77686_BUCK_MODE_MASK)
233 case MAX77686_BUCK_MODE_OFF:
235 case MAX77686_BUCK_MODE_ON:
237 case MAX77686_BUCK_MODE_STANDBY:
243 return OPMODE_STANDBY;
247 case MAX77686_BUCK_MODE_LPM:
261 static int max77686_buck_modes(int buck, struct dm_regulator_mode **modesp)
265 if (buck < 1 || buck > MAX77686_BUCK_NUM)
270 *modesp = max77686_buck_mode_standby;
271 ret = ARRAY_SIZE(max77686_buck_mode_standby);
276 *modesp = max77686_buck_mode_lpm;
277 ret = ARRAY_SIZE(max77686_buck_mode_lpm);
280 *modesp = max77686_buck_mode_onoff;
281 ret = ARRAY_SIZE(max77686_buck_mode_onoff);
287 static int max77686_ldo_modes(int ldo, struct dm_regulator_mode **modesp,
292 if (ldo < 1 || ldo > MAX77686_LDO_NUM)
306 *modesp = max77686_ldo_mode_standby2;
307 ret = ARRAY_SIZE(max77686_ldo_mode_standby2);
310 *modesp = max77686_ldo_mode_standby1;
311 ret = ARRAY_SIZE(max77686_ldo_mode_standby1);
317 static int max77686_ldo_val(struct udevice *dev, int op, int *uV)
323 if (op == PMIC_OP_GET)
326 ldo = dev->driver_data;
327 if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
328 pr_err("Wrong ldo number: %d", ldo);
332 adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
334 ret = pmic_read(dev->parent, adr, &val, 1);
338 if (op == PMIC_OP_GET) {
339 val &= MAX77686_LDO_VOLT_MASK;
340 ret = max77686_ldo_hex2volt(ldo, val);
347 hex = max77686_ldo_volt2hex(ldo, *uV);
351 val &= ~MAX77686_LDO_VOLT_MASK;
353 ret = pmic_write(dev->parent, adr, &val, 1);
358 static int max77686_buck_val(struct udevice *dev, int op, int *uV)
360 unsigned int mask, adr;
364 buck = dev->driver_data;
365 if (buck < 1 || buck > MAX77686_BUCK_NUM) {
366 pr_err("Wrong buck number: %d", buck);
370 if (op == PMIC_OP_GET)
373 /* &buck_out = ctrl + 1 */
374 adr = max77686_buck_out[buck];
381 mask = MAX77686_BUCK234_VOLT_MASK;
384 mask = MAX77686_BUCK_VOLT_MASK;
388 ret = pmic_read(dev->parent, adr, &val, 1);
392 if (op == PMIC_OP_GET) {
394 ret = max77686_buck_hex2volt(buck, val);
401 hex = max77686_buck_volt2hex(buck, *uV);
407 ret = pmic_write(dev->parent, adr, &val, 1);
412 static int max77686_ldo_mode(struct udevice *dev, int op, int *opmode)
414 unsigned int adr, mode;
418 if (op == PMIC_OP_GET)
421 ldo = dev->driver_data;
422 if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
423 pr_err("Wrong ldo number: %d", ldo);
427 adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
429 ret = pmic_read(dev->parent, adr, &val, 1);
433 if (op == PMIC_OP_GET) {
434 val &= MAX77686_LDO_MODE_MASK;
435 ret = max77686_ldo_hex2mode(ldo, val);
445 mode = MAX77686_LDO_MODE_OFF;
461 mode = MAX77686_LDO_MODE_LPM;
476 mode = MAX77686_LDO_MODE_STANDBY;
482 case OPMODE_STANDBY_LPM:
483 mode = MAX77686_LDO_MODE_STANDBY_LPM;
486 mode = MAX77686_LDO_MODE_ON;
493 pr_err("Wrong mode: %d for ldo%d", *opmode, ldo);
497 val &= ~MAX77686_LDO_MODE_MASK;
499 ret = pmic_write(dev->parent, adr, &val, 1);
504 static int max77686_ldo_enable(struct udevice *dev, int op, bool *enable)
508 if (op == PMIC_OP_GET) {
509 ret = max77686_ldo_mode(dev, op, &on_off);
523 } else if (op == PMIC_OP_SET) {
529 ret = max77686_ldo_mode(dev, op, &on_off);
537 static int max77686_buck_mode(struct udevice *dev, int op, int *opmode)
539 unsigned int mask, adr, mode, mode_shift;
543 buck = dev->driver_data;
544 if (buck < 1 || buck > MAX77686_BUCK_NUM) {
545 pr_err("Wrong buck number: %d", buck);
549 adr = max77686_buck_ctrl[buck];
556 mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
559 mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
562 mask = MAX77686_BUCK_MODE_MASK << mode_shift;
564 ret = pmic_read(dev->parent, adr, &val, 1);
568 if (op == PMIC_OP_GET) {
571 ret = max77686_buck_hex2mode(buck, val);
581 mode = MAX77686_BUCK_MODE_OFF;
589 mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
600 mode = MAX77686_BUCK_MODE_LPM << mode_shift;
607 mode = MAX77686_BUCK_MODE_ON << mode_shift;
614 pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck);
620 ret = pmic_write(dev->parent, adr, &val, 1);
625 static int max77686_buck_enable(struct udevice *dev, int op, bool *enable)
629 if (op == PMIC_OP_GET) {
630 ret = max77686_buck_mode(dev, op, &on_off);
644 } else if (op == PMIC_OP_SET) {
650 ret = max77686_buck_mode(dev, op, &on_off);
658 static int max77686_ldo_probe(struct udevice *dev)
660 struct dm_regulator_uclass_platdata *uc_pdata;
662 uc_pdata = dev_get_uclass_platdata(dev);
664 uc_pdata->type = REGULATOR_TYPE_LDO;
665 uc_pdata->mode_count = max77686_ldo_modes(dev->driver_data,
666 &uc_pdata->mode, dev);
671 static int ldo_get_value(struct udevice *dev)
676 ret = max77686_ldo_val(dev, PMIC_OP_GET, &uV);
683 static int ldo_set_value(struct udevice *dev, int uV)
685 return max77686_ldo_val(dev, PMIC_OP_SET, &uV);
688 static int ldo_get_enable(struct udevice *dev)
693 ret = max77686_ldo_enable(dev, PMIC_OP_GET, &enable);
700 static int ldo_set_enable(struct udevice *dev, bool enable)
702 return max77686_ldo_enable(dev, PMIC_OP_SET, &enable);
705 static int ldo_get_mode(struct udevice *dev)
710 ret = max77686_ldo_mode(dev, PMIC_OP_GET, &mode);
717 static int ldo_set_mode(struct udevice *dev, int mode)
719 return max77686_ldo_mode(dev, PMIC_OP_SET, &mode);
722 static int max77686_buck_probe(struct udevice *dev)
724 struct dm_regulator_uclass_platdata *uc_pdata;
726 uc_pdata = dev_get_uclass_platdata(dev);
728 uc_pdata->type = REGULATOR_TYPE_BUCK;
729 uc_pdata->mode_count = max77686_buck_modes(dev->driver_data,
735 static int buck_get_value(struct udevice *dev)
740 ret = max77686_buck_val(dev, PMIC_OP_GET, &uV);
747 static int buck_set_value(struct udevice *dev, int uV)
749 return max77686_buck_val(dev, PMIC_OP_SET, &uV);
752 static int buck_get_enable(struct udevice *dev)
757 ret = max77686_buck_enable(dev, PMIC_OP_GET, &enable);
764 static int buck_set_enable(struct udevice *dev, bool enable)
766 return max77686_buck_enable(dev, PMIC_OP_SET, &enable);
769 static int buck_get_mode(struct udevice *dev)
774 ret = max77686_buck_mode(dev, PMIC_OP_GET, &mode);
781 static int buck_set_mode(struct udevice *dev, int mode)
783 return max77686_buck_mode(dev, PMIC_OP_SET, &mode);
786 static const struct dm_regulator_ops max77686_ldo_ops = {
787 .get_value = ldo_get_value,
788 .set_value = ldo_set_value,
789 .get_enable = ldo_get_enable,
790 .set_enable = ldo_set_enable,
791 .get_mode = ldo_get_mode,
792 .set_mode = ldo_set_mode,
795 U_BOOT_DRIVER(max77686_ldo) = {
796 .name = MAX77686_LDO_DRIVER,
797 .id = UCLASS_REGULATOR,
798 .ops = &max77686_ldo_ops,
799 .probe = max77686_ldo_probe,
802 static const struct dm_regulator_ops max77686_buck_ops = {
803 .get_value = buck_get_value,
804 .set_value = buck_set_value,
805 .get_enable = buck_get_enable,
806 .set_enable = buck_set_enable,
807 .get_mode = buck_get_mode,
808 .set_mode = buck_set_mode,
811 U_BOOT_DRIVER(max77686_buck) = {
812 .name = MAX77686_BUCK_DRIVER,
813 .id = UCLASS_REGULATOR,
814 .ops = &max77686_buck_ops,
815 .probe = max77686_buck_probe,