drivers/power/regulator/max77686.c - manifest_repos/u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  *  Copyright (C) 2012-2015 Samsung Electronics
  *
  *  Rajeshwari Shinde <rajeshwari.s@samsung.com>
  *  Przemyslaw Marczak <p.marczak@samsung.com>
  */

 #include <common.h>
 #include <fdtdec.h>
 #include <errno.h>
 #include <dm.h>
 #include <i2c.h>
 #include <power/pmic.h>
 #include <power/regulator.h>
 #include <power/max77686_pmic.h>

 #define MODE(_id, _val, _name) { \
 	.id = _id, \
 	.register_value = _val, \
 	.name = _name, \
 }

 /* LDO: 1,3,4,5,9,17,18,19,20,21,22,23,24,26,26,27 */
 static struct dm_regulator_mode max77686_ldo_mode_standby1[] = {
 	MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
 	MODE(OPMODE_LPM, MAX77686_LDO_MODE_LPM, "LPM"),
 	MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
 	MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
 };

 /* LDO: 2,6,7,8,10,11,12,14,15,16 */
 static struct dm_regulator_mode max77686_ldo_mode_standby2[] = {
 	MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
 	MODE(OPMODE_STANDBY, MAX77686_LDO_MODE_STANDBY, "ON/OFF"),
 	MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
 	MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
 };

 /* Buck: 1 */
 static struct dm_regulator_mode max77686_buck_mode_standby[] = {
 	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
 	MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
 	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
 };

 /* Buck: 2,3,4 */
 static struct dm_regulator_mode max77686_buck_mode_lpm[] = {
 	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
 	MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
 	MODE(OPMODE_LPM, MAX77686_BUCK_MODE_LPM, "LPM"),
 	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
 };

 /* Buck: 5,6,7,8,9 */
 static struct dm_regulator_mode max77686_buck_mode_onoff[] = {
 	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
 	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
 };

 static const char max77686_buck_ctrl[] = {
 	0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
 };

 static const char max77686_buck_out[] = {
 	0xff, 0x11, 0x14, 0x1e, 0x28, 0x31, 0x33, 0x35, 0x37, 0x39
 };

 static int max77686_buck_volt2hex(int buck, int uV)
 {
 	int hex = 0;
 	int hex_max = 0;

 	switch (buck) {
 	case 2:
 	case 3:
 	case 4:
 		/* hex = (uV - 600000) / 12500; */
 		hex = (uV - MAX77686_BUCK_UV_LMIN) / MAX77686_BUCK_UV_LSTEP;
 		hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
 		break;
 	default:
 		/*
 		 * hex = (uV - 750000) / 50000. We assume that dynamic voltage
 		 * scaling via GPIOs is not enabled and don't support that.
 		 * If this is enabled then the driver will need to take that
 		 * into account and check different registers depending on
 		 * the current setting. See the datasheet for details.
 		 */
 		hex = (uV - MAX77686_BUCK_UV_HMIN) / MAX77686_BUCK_UV_HSTEP;
 		hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
 		break;
 	}

 	if (hex >= 0 && hex <= hex_max)
 		return hex;

 	pr_err("Value: %d uV is wrong for BUCK%d", uV, buck);
 	return -EINVAL;
 }

 static int max77686_buck_hex2volt(int buck, int hex)
 {
 	unsigned uV = 0;
 	int hex_max = 0;

 	if (hex < 0)
 		goto bad_hex;

 	switch (buck) {
 	case 2:
 	case 3:
 	case 4:
 		hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
 		if (hex > hex_max)
 			goto bad_hex;

 		/* uV = hex * 12500 + 600000; */
 		uV = hex * MAX77686_BUCK_UV_LSTEP + MAX77686_BUCK_UV_LMIN;
 		break;
 	default:
 		hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
 		if (hex > hex_max)
 			goto bad_hex;

 		/* uV = hex * 50000 + 750000; */
 		uV = hex * MAX77686_BUCK_UV_HSTEP + MAX77686_BUCK_UV_HMIN;
 		break;
 	}

 	return uV;

 bad_hex:
 	pr_err("Value: %#x is wrong for BUCK%d", hex, buck);
 	return -EINVAL;
 }

 static int max77686_ldo_volt2hex(int ldo, int uV)
 {
 	int hex = 0;

 	switch (ldo) {
 	case 1:
 	case 2:
 	case 6:
 	case 7:
 	case 8:
 	case 15:
 		hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_LSTEP;
 		/* hex = (uV - 800000) / 25000; */
 		break;
 	default:
 		hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_HSTEP;
 		/* hex = (uV - 800000) / 50000; */
 	}

 	if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
 		return hex;

 	pr_err("Value: %d uV is wrong for LDO%d", uV, ldo);
 	return -EINVAL;
 }

 static int max77686_ldo_hex2volt(int ldo, int hex)
 {
 	unsigned int uV = 0;

 	if (hex > MAX77686_LDO_VOLT_MAX_HEX)
 		goto bad_hex;

 	switch (ldo) {
 	case 1:
 	case 2:
 	case 6:
 	case 7:
 	case 8:
 	case 15:
 		/* uV = hex * 25000 + 800000; */
 		uV = hex * MAX77686_LDO_UV_LSTEP + MAX77686_LDO_UV_MIN;
 		break;
 	default:
 		/* uV = hex * 50000 + 800000; */
 		uV = hex * MAX77686_LDO_UV_HSTEP + MAX77686_LDO_UV_MIN;
 	}

 	return uV;

 bad_hex:
 	pr_err("Value: %#x is wrong for ldo%d", hex, ldo);
 	return -EINVAL;
 }

 static int max77686_ldo_hex2mode(int ldo, int hex)
 {
 	if (hex > MAX77686_LDO_MODE_MASK)
 		return -EINVAL;

 	switch (hex) {
 	case MAX77686_LDO_MODE_OFF:
 		return OPMODE_OFF;
 	case MAX77686_LDO_MODE_LPM: /* == MAX77686_LDO_MODE_STANDBY: */
 		/* The same mode values but different meaning for each ldo */
 		switch (ldo) {
 		case 2:
 		case 6:
 		case 7:
 		case 8:
 		case 10:
 		case 11:
 		case 12:
 		case 14:
 		case 15:
 		case 16:
 			return OPMODE_STANDBY;
 		default:
 			return OPMODE_LPM;
 		}
 	case MAX77686_LDO_MODE_STANDBY_LPM:
 		return OPMODE_STANDBY_LPM;
 	case MAX77686_LDO_MODE_ON:
 		return OPMODE_ON;
 	default:
 		return -EINVAL;
 	}
 }

 static int max77686_buck_hex2mode(int buck, int hex)
 {
 	if (hex > MAX77686_BUCK_MODE_MASK)
 		return -EINVAL;

 	switch (hex) {
 	case MAX77686_BUCK_MODE_OFF:
 		return OPMODE_OFF;
 	case MAX77686_BUCK_MODE_ON:
 		return OPMODE_ON;
 	case MAX77686_BUCK_MODE_STANDBY:
 		switch (buck) {
 		case 1:
 		case 2:
 		case 3:
 		case 4:
 			return OPMODE_STANDBY;
 		default:
 			return -EINVAL;
 		}
 	case MAX77686_BUCK_MODE_LPM:
 		switch (buck) {
 		case 2:
 		case 3:
 		case 4:
 			return OPMODE_LPM;
 		default:
 			return -EINVAL;
 		}
 	default:
 		return -EINVAL;
 	}
 }

 static int max77686_buck_modes(int buck, struct dm_regulator_mode **modesp)
 {
 	int ret = -EINVAL;

 	if (buck < 1 || buck > MAX77686_BUCK_NUM)
 		return ret;

 	switch (buck) {
 	case 1:
 		*modesp = max77686_buck_mode_standby;
 		ret = ARRAY_SIZE(max77686_buck_mode_standby);
 		break;
 	case 2:
 	case 3:
 	case 4:
 		*modesp = max77686_buck_mode_lpm;
 		ret = ARRAY_SIZE(max77686_buck_mode_lpm);
 		break;
 	default:
 		*modesp = max77686_buck_mode_onoff;
 		ret = ARRAY_SIZE(max77686_buck_mode_onoff);
 	}

 	return ret;
 }

 static int max77686_ldo_modes(int ldo, struct dm_regulator_mode **modesp,
 				struct udevice *dev)
 {
 	int ret = -EINVAL;

 	if (ldo < 1 || ldo > MAX77686_LDO_NUM)
 		return ret;

 	switch (ldo) {
 	case 2:
 	case 6:
 	case 7:
 	case 8:
 	case 10:
 	case 11:
 	case 12:
 	case 14:
 	case 15:
 	case 16:
 		*modesp = max77686_ldo_mode_standby2;
 		ret = ARRAY_SIZE(max77686_ldo_mode_standby2);
 		break;
 	default:
 		*modesp = max77686_ldo_mode_standby1;
 		ret = ARRAY_SIZE(max77686_ldo_mode_standby1);
 	}

 	return ret;
 }

 static int max77686_ldo_val(struct udevice *dev, int op, int *uV)
 {
 	unsigned int adr;
 	unsigned char val;
 	int hex, ldo, ret;

 	if (op == PMIC_OP_GET)
 		*uV = 0;

 	ldo = dev->driver_data;
 	if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
 		pr_err("Wrong ldo number: %d", ldo);
 		return -EINVAL;
 	}

 	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;

 	ret = pmic_read(dev->parent, adr, &val, 1);
 	if (ret)
 		return ret;

 	if (op == PMIC_OP_GET) {
 		val &= MAX77686_LDO_VOLT_MASK;
 		ret = max77686_ldo_hex2volt(ldo, val);
 		if (ret < 0)
 			return ret;
 		*uV = ret;
 		return 0;
 	}

 	hex = max77686_ldo_volt2hex(ldo, *uV);
 	if (hex < 0)
 		return hex;

 	val &= ~MAX77686_LDO_VOLT_MASK;
 	val |= hex;
 	ret = pmic_write(dev->parent, adr, &val, 1);

 	return ret;
 }

 static int max77686_buck_val(struct udevice *dev, int op, int *uV)
 {
 	unsigned int mask, adr;
 	unsigned char val;
 	int hex, buck, ret;

 	buck = dev->driver_data;
 	if (buck < 1 || buck > MAX77686_BUCK_NUM) {
 		pr_err("Wrong buck number: %d", buck);
 		return -EINVAL;
 	}

 	if (op == PMIC_OP_GET)
 		*uV = 0;

 	/* &buck_out = ctrl + 1 */
 	adr = max77686_buck_out[buck];

 	/* mask */
 	switch (buck) {
 	case 2:
 	case 3:
 	case 4:
 		mask = MAX77686_BUCK234_VOLT_MASK;
 		break;
 	default:
 		mask = MAX77686_BUCK_VOLT_MASK;
 		break;
 	}

 	ret = pmic_read(dev->parent, adr, &val, 1);
 	if (ret)
 		return ret;

 	if (op == PMIC_OP_GET) {
 		val &= mask;
 		ret = max77686_buck_hex2volt(buck, val);
 		if (ret < 0)
 			return ret;
 		*uV = ret;
 		return 0;
 	}

 	hex = max77686_buck_volt2hex(buck, *uV);
 	if (hex < 0)
 		return hex;

 	val &= ~mask;
 	val |= hex;
 	ret = pmic_write(dev->parent, adr, &val, 1);

 	return ret;
 }

 static int max77686_ldo_mode(struct udevice *dev, int op, int *opmode)
 {
 	unsigned int adr, mode;
 	unsigned char val;
 	int ldo, ret;

 	if (op == PMIC_OP_GET)
 		*opmode = -EINVAL;

 	ldo = dev->driver_data;
 	if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
 		pr_err("Wrong ldo number: %d", ldo);
 		return -EINVAL;
 	}

 	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;

 	ret = pmic_read(dev->parent, adr, &val, 1);
 	if (ret)
 		return ret;

 	if (op == PMIC_OP_GET) {
 		val &= MAX77686_LDO_MODE_MASK;
 		ret = max77686_ldo_hex2mode(ldo, val);
 		if (ret < 0)
 			return ret;
 		*opmode = ret;
 		return 0;
 	}

 	/* mode */
 	switch (*opmode) {
 	case OPMODE_OFF:
 		mode = MAX77686_LDO_MODE_OFF;
 		break;
 	case OPMODE_LPM:
 		switch (ldo) {
 		case 2:
 		case 6:
 		case 7:
 		case 8:
 		case 10:
 		case 11:
 		case 12:
 		case 14:
 		case 15:
 		case 16:
 			return -EINVAL;
 		default:
 			mode = MAX77686_LDO_MODE_LPM;
 		}
 		break;
 	case OPMODE_STANDBY:
 		switch (ldo) {
 		case 2:
 		case 6:
 		case 7:
 		case 8:
 		case 10:
 		case 11:
 		case 12:
 		case 14:
 		case 15:
 		case 16:
 			mode = MAX77686_LDO_MODE_STANDBY;
 			break;
 		default:
 			return -EINVAL;
 		}
 		break;
 	case OPMODE_STANDBY_LPM:
 		mode = MAX77686_LDO_MODE_STANDBY_LPM;
 		break;
 	case OPMODE_ON:
 		mode = MAX77686_LDO_MODE_ON;
 		break;
 	default:
 		mode = 0xff;
 	}

 	if (mode == 0xff) {
 		pr_err("Wrong mode: %d for ldo%d", *opmode, ldo);
 		return -EINVAL;
 	}

 	val &= ~MAX77686_LDO_MODE_MASK;
 	val |= mode;
 	ret = pmic_write(dev->parent, adr, &val, 1);

 	return ret;
 }

 static int max77686_ldo_enable(struct udevice *dev, int op, bool *enable)
 {
 	int ret, on_off;

 	if (op == PMIC_OP_GET) {
 		ret = max77686_ldo_mode(dev, op, &on_off);
 		if (ret)
 			return ret;

 		switch (on_off) {
 		case OPMODE_OFF:
 			*enable = false;
 			break;
 		case OPMODE_ON:
 			*enable = true;
 			break;
 		default:
 			return -EINVAL;
 		}
 	} else if (op == PMIC_OP_SET) {
 		if (*enable)
 			on_off = OPMODE_ON;
 		else
 			on_off = OPMODE_OFF;

 		ret = max77686_ldo_mode(dev, op, &on_off);
 		if (ret)
 			return ret;
 	}

 	return 0;
 }

 static int max77686_buck_mode(struct udevice *dev, int op, int *opmode)
 {
 	unsigned int mask, adr, mode, mode_shift;
 	unsigned char val;
 	int buck, ret;

 	buck = dev->driver_data;
 	if (buck < 1 || buck > MAX77686_BUCK_NUM) {
 		pr_err("Wrong buck number: %d", buck);
 		return -EINVAL;
 	}

 	adr = max77686_buck_ctrl[buck];

 	/* mask */
 	switch (buck) {
 	case 2:
 	case 3:
 	case 4:
 		mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
 		break;
 	default:
 		mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
 	}

 	mask = MAX77686_BUCK_MODE_MASK << mode_shift;

 	ret = pmic_read(dev->parent, adr, &val, 1);
 	if (ret)
 		return ret;

 	if (op == PMIC_OP_GET) {
 		val &= mask;
 		val >>= mode_shift;
 		ret = max77686_buck_hex2mode(buck, val);
 		if (ret < 0)
 			return ret;
 		*opmode = ret;
 		return 0;
 	}

 	/* mode */
 	switch (*opmode) {
 	case OPMODE_OFF:
 		mode = MAX77686_BUCK_MODE_OFF;
 		break;
 	case OPMODE_STANDBY:
 		switch (buck) {
 		case 1:
 		case 2:
 		case 3:
 		case 4:
 			mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
 			break;
 		default:
 			mode = 0xff;
 		}
 		break;
 	case OPMODE_LPM:
 		switch (buck) {
 		case 2:
 		case 3:
 		case 4:
 			mode = MAX77686_BUCK_MODE_LPM << mode_shift;
 			break;
 		default:
 			mode = 0xff;
 		}
 		break;
 	case OPMODE_ON:
 		mode = MAX77686_BUCK_MODE_ON << mode_shift;
 		break;
 	default:
 		mode = 0xff;
 	}

 	if (mode == 0xff) {
 		pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck);
 		return -EINVAL;
 	}

 	val &= ~mask;
 	val |= mode;
 	ret = pmic_write(dev->parent, adr, &val, 1);

 	return ret;
 }

 static int max77686_buck_enable(struct udevice *dev, int op, bool *enable)
 {
 	int ret, on_off;

 	if (op == PMIC_OP_GET) {
 		ret = max77686_buck_mode(dev, op, &on_off);
 		if (ret)
 			return ret;

 		switch (on_off) {
 		case OPMODE_OFF:
 			*enable = false;
 			break;
 		case OPMODE_ON:
 			*enable = true;
 			break;
 		default:
 			return -EINVAL;
 		}
 	} else if (op == PMIC_OP_SET) {
 		if (*enable)
 			on_off = OPMODE_ON;
 		else
 			on_off = OPMODE_OFF;

 		ret = max77686_buck_mode(dev, op, &on_off);
 		if (ret)
 			return ret;
 	}

 	return 0;
 }

 static int max77686_ldo_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_platdata *uc_pdata;

 	uc_pdata = dev_get_uclass_platdata(dev);

 	uc_pdata->type = REGULATOR_TYPE_LDO;
 	uc_pdata->mode_count = max77686_ldo_modes(dev->driver_data,
 						  &uc_pdata->mode, dev);

 	return 0;
 }

 static int ldo_get_value(struct udevice *dev)
 {
 	int uV;
 	int ret;

 	ret = max77686_ldo_val(dev, PMIC_OP_GET, &uV);
 	if (ret)
 		return ret;

 	return uV;
 }

 static int ldo_set_value(struct udevice *dev, int uV)
 {
 	return max77686_ldo_val(dev, PMIC_OP_SET, &uV);
 }

 static int ldo_get_enable(struct udevice *dev)
 {
 	bool enable = false;
 	int ret;

 	ret = max77686_ldo_enable(dev, PMIC_OP_GET, &enable);
 	if (ret)
 		return ret;

 	return enable;
 }

 static int ldo_set_enable(struct udevice *dev, bool enable)
 {
 	return max77686_ldo_enable(dev, PMIC_OP_SET, &enable);
 }

 static int ldo_get_mode(struct udevice *dev)
 {
 	int mode;
 	int ret;

 	ret = max77686_ldo_mode(dev, PMIC_OP_GET, &mode);
 	if (ret)
 		return ret;

 	return mode;
 }

 static int ldo_set_mode(struct udevice *dev, int mode)
 {
 	return max77686_ldo_mode(dev, PMIC_OP_SET, &mode);
 }

 static int max77686_buck_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_platdata *uc_pdata;

 	uc_pdata = dev_get_uclass_platdata(dev);

 	uc_pdata->type = REGULATOR_TYPE_BUCK;
 	uc_pdata->mode_count = max77686_buck_modes(dev->driver_data,
 						   &uc_pdata->mode);

 	return 0;
 }

 static int buck_get_value(struct udevice *dev)
 {
 	int uV;
 	int ret;

 	ret = max77686_buck_val(dev, PMIC_OP_GET, &uV);
 	if (ret)
 		return ret;

 	return uV;
 }

 static int buck_set_value(struct udevice *dev, int uV)
 {
 	return max77686_buck_val(dev, PMIC_OP_SET, &uV);
 }

 static int buck_get_enable(struct udevice *dev)
 {
 	bool enable = false;
 	int ret;

 	ret = max77686_buck_enable(dev, PMIC_OP_GET, &enable);
 	if (ret)
 		return ret;

 	return enable;
 }

 static int buck_set_enable(struct udevice *dev, bool enable)
 {
 	return max77686_buck_enable(dev, PMIC_OP_SET, &enable);
 }

 static int buck_get_mode(struct udevice *dev)
 {
 	int mode;
 	int ret;

 	ret = max77686_buck_mode(dev, PMIC_OP_GET, &mode);
 	if (ret)
 		return ret;

 	return mode;
 }

 static int buck_set_mode(struct udevice *dev, int mode)
 {
 	return max77686_buck_mode(dev, PMIC_OP_SET, &mode);
 }

 static const struct dm_regulator_ops max77686_ldo_ops = {
 	.get_value  = ldo_get_value,
 	.set_value  = ldo_set_value,
 	.get_enable = ldo_get_enable,
 	.set_enable = ldo_set_enable,
 	.get_mode   = ldo_get_mode,
 	.set_mode   = ldo_set_mode,
 };

 U_BOOT_DRIVER(max77686_ldo) = {
 	.name = MAX77686_LDO_DRIVER,
 	.id = UCLASS_REGULATOR,
 	.ops = &max77686_ldo_ops,
 	.probe = max77686_ldo_probe,
 };

 static const struct dm_regulator_ops max77686_buck_ops = {
 	.get_value  = buck_get_value,
 	.set_value  = buck_set_value,
 	.get_enable = buck_get_enable,
 	.set_enable = buck_set_enable,
 	.get_mode   = buck_get_mode,
 	.set_mode   = buck_set_mode,
 };

 U_BOOT_DRIVER(max77686_buck) = {
 	.name = MAX77686_BUCK_DRIVER,
 	.id = UCLASS_REGULATOR,
 	.ops = &max77686_buck_ops,
 	.probe = max77686_buck_probe,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2012-2015 Samsung Electronics
	*
	* Rajeshwari Shinde <rajeshwari.s@samsung.com>
	* Przemyslaw Marczak <p.marczak@samsung.com>
	*/

	#include <common.h>
	#include <fdtdec.h>
	#include <errno.h>
	#include <dm.h>
	#include <i2c.h>
	#include <power/pmic.h>
	#include <power/regulator.h>
	#include <power/max77686_pmic.h>

	#define MODE(_id, _val, _name) { \
	.id = _id, \
	.register_value = _val, \
	.name = _name, \
	}

	/* LDO: 1,3,4,5,9,17,18,19,20,21,22,23,24,26,26,27 */
	static struct dm_regulator_mode max77686_ldo_mode_standby1[] = {
	MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
	MODE(OPMODE_LPM, MAX77686_LDO_MODE_LPM, "LPM"),
	MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
	MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
	};

	/* LDO: 2,6,7,8,10,11,12,14,15,16 */
	static struct dm_regulator_mode max77686_ldo_mode_standby2[] = {
	MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
	MODE(OPMODE_STANDBY, MAX77686_LDO_MODE_STANDBY, "ON/OFF"),
	MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
	MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
	};

	/* Buck: 1 */
	static struct dm_regulator_mode max77686_buck_mode_standby[] = {
	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
	MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
	};

	/* Buck: 2,3,4 */
	static struct dm_regulator_mode max77686_buck_mode_lpm[] = {
	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
	MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
	MODE(OPMODE_LPM, MAX77686_BUCK_MODE_LPM, "LPM"),
	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
	};

	/* Buck: 5,6,7,8,9 */
	static struct dm_regulator_mode max77686_buck_mode_onoff[] = {
	MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
	MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
	};

	static const char max77686_buck_ctrl[] = {
	0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
	};

	static const char max77686_buck_out[] = {
	0xff, 0x11, 0x14, 0x1e, 0x28, 0x31, 0x33, 0x35, 0x37, 0x39
	};

	static int max77686_buck_volt2hex(int buck, int uV)
	{
	int hex = 0;
	int hex_max = 0;

	switch (buck) {
	case 2:
	case 3:
	case 4:
	/* hex = (uV - 600000) / 12500; */
	hex = (uV - MAX77686_BUCK_UV_LMIN) / MAX77686_BUCK_UV_LSTEP;
	hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
	break;
	default:
	/*
	* hex = (uV - 750000) / 50000. We assume that dynamic voltage
	* scaling via GPIOs is not enabled and don't support that.
	* If this is enabled then the driver will need to take that
	* into account and check different registers depending on
	* the current setting. See the datasheet for details.
	*/
	hex = (uV - MAX77686_BUCK_UV_HMIN) / MAX77686_BUCK_UV_HSTEP;
	hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
	break;
	}

	if (hex >= 0 && hex <= hex_max)
	return hex;

	pr_err("Value: %d uV is wrong for BUCK%d", uV, buck);
	return -EINVAL;
	}

	static int max77686_buck_hex2volt(int buck, int hex)
	{
	unsigned uV = 0;
	int hex_max = 0;

	if (hex < 0)
	goto bad_hex;

	switch (buck) {
	case 2:
	case 3:
	case 4:
	hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
	if (hex > hex_max)
	goto bad_hex;

	/* uV = hex * 12500 + 600000; */
	uV = hex * MAX77686_BUCK_UV_LSTEP + MAX77686_BUCK_UV_LMIN;
	break;
	default:
	hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
	if (hex > hex_max)
	goto bad_hex;

	/* uV = hex * 50000 + 750000; */
	uV = hex * MAX77686_BUCK_UV_HSTEP + MAX77686_BUCK_UV_HMIN;
	break;
	}

	return uV;

	bad_hex:
	pr_err("Value: %#x is wrong for BUCK%d", hex, buck);
	return -EINVAL;
	}

	static int max77686_ldo_volt2hex(int ldo, int uV)
	{
	int hex = 0;

	switch (ldo) {
	case 1:
	case 2:
	case 6:
	case 7:
	case 8:
	case 15:
	hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_LSTEP;
	/* hex = (uV - 800000) / 25000; */
	break;
	default:
	hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_HSTEP;
	/* hex = (uV - 800000) / 50000; */
	}

	if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
	return hex;

	pr_err("Value: %d uV is wrong for LDO%d", uV, ldo);
	return -EINVAL;
	}

	static int max77686_ldo_hex2volt(int ldo, int hex)
	{
	unsigned int uV = 0;

	if (hex > MAX77686_LDO_VOLT_MAX_HEX)
	goto bad_hex;

	switch (ldo) {
	case 1:
	case 2:
	case 6:
	case 7:
	case 8:
	case 15:
	/* uV = hex * 25000 + 800000; */
	uV = hex * MAX77686_LDO_UV_LSTEP + MAX77686_LDO_UV_MIN;
	break;
	default:
	/* uV = hex * 50000 + 800000; */
	uV = hex * MAX77686_LDO_UV_HSTEP + MAX77686_LDO_UV_MIN;
	}

	return uV;

	bad_hex:
	pr_err("Value: %#x is wrong for ldo%d", hex, ldo);
	return -EINVAL;
	}

	static int max77686_ldo_hex2mode(int ldo, int hex)
	{
	if (hex > MAX77686_LDO_MODE_MASK)
	return -EINVAL;

	switch (hex) {
	case MAX77686_LDO_MODE_OFF:
	return OPMODE_OFF;
	case MAX77686_LDO_MODE_LPM: /* == MAX77686_LDO_MODE_STANDBY: */
	/* The same mode values but different meaning for each ldo */
	switch (ldo) {
	case 2:
	case 6:
	case 7:
	case 8:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
	case 16:
	return OPMODE_STANDBY;
	default:
	return OPMODE_LPM;
	}
	case MAX77686_LDO_MODE_STANDBY_LPM:
	return OPMODE_STANDBY_LPM;
	case MAX77686_LDO_MODE_ON:
	return OPMODE_ON;
	default:
	return -EINVAL;
	}
	}

	static int max77686_buck_hex2mode(int buck, int hex)
	{
	if (hex > MAX77686_BUCK_MODE_MASK)
	return -EINVAL;

	switch (hex) {
	case MAX77686_BUCK_MODE_OFF:
	return OPMODE_OFF;
	case MAX77686_BUCK_MODE_ON:
	return OPMODE_ON;
	case MAX77686_BUCK_MODE_STANDBY:
	switch (buck) {
	case 1:
	case 2:
	case 3:
	case 4:
	return OPMODE_STANDBY;
	default:
	return -EINVAL;
	}
	case MAX77686_BUCK_MODE_LPM:
	switch (buck) {
	case 2:
	case 3:
	case 4:
	return OPMODE_LPM;
	default:
	return -EINVAL;
	}
	default:
	return -EINVAL;
	}
	}

	static int max77686_buck_modes(int buck, struct dm_regulator_mode **modesp)
	{
	int ret = -EINVAL;

	if (buck < 1 \|\| buck > MAX77686_BUCK_NUM)
	return ret;

	switch (buck) {
	case 1:
	*modesp = max77686_buck_mode_standby;
	ret = ARRAY_SIZE(max77686_buck_mode_standby);
	break;
	case 2:
	case 3:
	case 4:
	*modesp = max77686_buck_mode_lpm;
	ret = ARRAY_SIZE(max77686_buck_mode_lpm);
	break;
	default:
	*modesp = max77686_buck_mode_onoff;
	ret = ARRAY_SIZE(max77686_buck_mode_onoff);
	}

	return ret;
	}

	static int max77686_ldo_modes(int ldo, struct dm_regulator_mode **modesp,
	struct udevice *dev)
	{
	int ret = -EINVAL;

	if (ldo < 1 \|\| ldo > MAX77686_LDO_NUM)
	return ret;

	switch (ldo) {
	case 2:
	case 6:
	case 7:
	case 8:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
	case 16:
	*modesp = max77686_ldo_mode_standby2;
	ret = ARRAY_SIZE(max77686_ldo_mode_standby2);
	break;
	default:
	*modesp = max77686_ldo_mode_standby1;
	ret = ARRAY_SIZE(max77686_ldo_mode_standby1);
	}

	return ret;
	}

	static int max77686_ldo_val(struct udevice dev, int op, int uV)
	{
	unsigned int adr;
	unsigned char val;
	int hex, ldo, ret;

	if (op == PMIC_OP_GET)
	*uV = 0;

	ldo = dev->driver_data;
	if (ldo < 1 \|\| ldo > MAX77686_LDO_NUM) {
	pr_err("Wrong ldo number: %d", ldo);
	return -EINVAL;
	}

	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;

	ret = pmic_read(dev->parent, adr, &val, 1);
	if (ret)
	return ret;

	if (op == PMIC_OP_GET) {
	val &= MAX77686_LDO_VOLT_MASK;
	ret = max77686_ldo_hex2volt(ldo, val);
	if (ret < 0)
	return ret;
	*uV = ret;
	return 0;
	}

	hex = max77686_ldo_volt2hex(ldo, *uV);
	if (hex < 0)
	return hex;

	val &= ~MAX77686_LDO_VOLT_MASK;
	val \|= hex;
	ret = pmic_write(dev->parent, adr, &val, 1);

	return ret;
	}

	static int max77686_buck_val(struct udevice dev, int op, int uV)
	{
	unsigned int mask, adr;
	unsigned char val;
	int hex, buck, ret;

	buck = dev->driver_data;
	if (buck < 1 \|\| buck > MAX77686_BUCK_NUM) {
	pr_err("Wrong buck number: %d", buck);
	return -EINVAL;
	}

	if (op == PMIC_OP_GET)
	*uV = 0;

	/* &buck_out = ctrl + 1 */
	adr = max77686_buck_out[buck];

	/* mask */
	switch (buck) {
	case 2:
	case 3:
	case 4:
	mask = MAX77686_BUCK234_VOLT_MASK;
	break;
	default:
	mask = MAX77686_BUCK_VOLT_MASK;
	break;
	}

	ret = pmic_read(dev->parent, adr, &val, 1);
	if (ret)
	return ret;

	if (op == PMIC_OP_GET) {
	val &= mask;
	ret = max77686_buck_hex2volt(buck, val);
	if (ret < 0)
	return ret;
	*uV = ret;
	return 0;
	}

	hex = max77686_buck_volt2hex(buck, *uV);
	if (hex < 0)
	return hex;

	val &= ~mask;
	val \|= hex;
	ret = pmic_write(dev->parent, adr, &val, 1);

	return ret;
	}

	static int max77686_ldo_mode(struct udevice dev, int op, int opmode)
	{
	unsigned int adr, mode;
	unsigned char val;
	int ldo, ret;

	if (op == PMIC_OP_GET)
	*opmode = -EINVAL;

	ldo = dev->driver_data;
	if (ldo < 1 \|\| ldo > MAX77686_LDO_NUM) {
	pr_err("Wrong ldo number: %d", ldo);
	return -EINVAL;
	}

	adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;

	ret = pmic_read(dev->parent, adr, &val, 1);
	if (ret)
	return ret;

	if (op == PMIC_OP_GET) {
	val &= MAX77686_LDO_MODE_MASK;
	ret = max77686_ldo_hex2mode(ldo, val);
	if (ret < 0)
	return ret;
	*opmode = ret;
	return 0;
	}

	/* mode */
	switch (*opmode) {
	case OPMODE_OFF:
	mode = MAX77686_LDO_MODE_OFF;
	break;
	case OPMODE_LPM:
	switch (ldo) {
	case 2:
	case 6:
	case 7:
	case 8:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
	case 16:
	return -EINVAL;
	default:
	mode = MAX77686_LDO_MODE_LPM;
	}
	break;
	case OPMODE_STANDBY:
	switch (ldo) {
	case 2:
	case 6:
	case 7:
	case 8:
	case 10:
	case 11:
	case 12:
	case 14:
	case 15:
	case 16:
	mode = MAX77686_LDO_MODE_STANDBY;
	break;
	default:
	return -EINVAL;
	}
	break;
	case OPMODE_STANDBY_LPM:
	mode = MAX77686_LDO_MODE_STANDBY_LPM;
	break;
	case OPMODE_ON:
	mode = MAX77686_LDO_MODE_ON;
	break;
	default:
	mode = 0xff;
	}

	if (mode == 0xff) {
	pr_err("Wrong mode: %d for ldo%d", *opmode, ldo);
	return -EINVAL;
	}

	val &= ~MAX77686_LDO_MODE_MASK;
	val \|= mode;
	ret = pmic_write(dev->parent, adr, &val, 1);

	return ret;
	}

	static int max77686_ldo_enable(struct udevice dev, int op, bool enable)
	{
	int ret, on_off;

	if (op == PMIC_OP_GET) {
	ret = max77686_ldo_mode(dev, op, &on_off);
	if (ret)
	return ret;

	switch (on_off) {
	case OPMODE_OFF:
	*enable = false;
	break;
	case OPMODE_ON:
	*enable = true;
	break;
	default:
	return -EINVAL;
	}
	} else if (op == PMIC_OP_SET) {
	if (*enable)
	on_off = OPMODE_ON;
	else
	on_off = OPMODE_OFF;

	ret = max77686_ldo_mode(dev, op, &on_off);
	if (ret)
	return ret;
	}

	return 0;
	}

	static int max77686_buck_mode(struct udevice dev, int op, int opmode)
	{
	unsigned int mask, adr, mode, mode_shift;
	unsigned char val;
	int buck, ret;

	buck = dev->driver_data;
	if (buck < 1 \|\| buck > MAX77686_BUCK_NUM) {
	pr_err("Wrong buck number: %d", buck);
	return -EINVAL;
	}

	adr = max77686_buck_ctrl[buck];

	/* mask */
	switch (buck) {
	case 2:
	case 3:
	case 4:
	mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
	break;
	default:
	mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
	}

	mask = MAX77686_BUCK_MODE_MASK << mode_shift;

	ret = pmic_read(dev->parent, adr, &val, 1);
	if (ret)
	return ret;

	if (op == PMIC_OP_GET) {
	val &= mask;
	val >>= mode_shift;
	ret = max77686_buck_hex2mode(buck, val);
	if (ret < 0)
	return ret;
	*opmode = ret;
	return 0;
	}

	/* mode */
	switch (*opmode) {
	case OPMODE_OFF:
	mode = MAX77686_BUCK_MODE_OFF;
	break;
	case OPMODE_STANDBY:
	switch (buck) {
	case 1:
	case 2:
	case 3:
	case 4:
	mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
	break;
	default:
	mode = 0xff;
	}
	break;
	case OPMODE_LPM:
	switch (buck) {
	case 2:
	case 3:
	case 4:
	mode = MAX77686_BUCK_MODE_LPM << mode_shift;
	break;
	default:
	mode = 0xff;
	}
	break;
	case OPMODE_ON:
	mode = MAX77686_BUCK_MODE_ON << mode_shift;
	break;
	default:
	mode = 0xff;
	}

	if (mode == 0xff) {
	pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck);
	return -EINVAL;
	}

	val &= ~mask;
	val \|= mode;
	ret = pmic_write(dev->parent, adr, &val, 1);

	return ret;
	}

	static int max77686_buck_enable(struct udevice dev, int op, bool enable)
	{
	int ret, on_off;

	if (op == PMIC_OP_GET) {
	ret = max77686_buck_mode(dev, op, &on_off);
	if (ret)
	return ret;

	switch (on_off) {
	case OPMODE_OFF:
	*enable = false;
	break;
	case OPMODE_ON:
	*enable = true;
	break;
	default:
	return -EINVAL;
	}
	} else if (op == PMIC_OP_SET) {
	if (*enable)
	on_off = OPMODE_ON;
	else
	on_off = OPMODE_OFF;

	ret = max77686_buck_mode(dev, op, &on_off);
	if (ret)
	return ret;
	}

	return 0;
	}

	static int max77686_ldo_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);

	uc_pdata->type = REGULATOR_TYPE_LDO;
	uc_pdata->mode_count = max77686_ldo_modes(dev->driver_data,
	&uc_pdata->mode, dev);

	return 0;
	}

	static int ldo_get_value(struct udevice *dev)
	{
	int uV;
	int ret;

	ret = max77686_ldo_val(dev, PMIC_OP_GET, &uV);
	if (ret)
	return ret;

	return uV;
	}

	static int ldo_set_value(struct udevice *dev, int uV)
	{
	return max77686_ldo_val(dev, PMIC_OP_SET, &uV);
	}

	static int ldo_get_enable(struct udevice *dev)
	{
	bool enable = false;
	int ret;

	ret = max77686_ldo_enable(dev, PMIC_OP_GET, &enable);
	if (ret)
	return ret;

	return enable;
	}

	static int ldo_set_enable(struct udevice *dev, bool enable)
	{
	return max77686_ldo_enable(dev, PMIC_OP_SET, &enable);
	}

	static int ldo_get_mode(struct udevice *dev)
	{
	int mode;
	int ret;

	ret = max77686_ldo_mode(dev, PMIC_OP_GET, &mode);
	if (ret)
	return ret;

	return mode;
	}

	static int ldo_set_mode(struct udevice *dev, int mode)
	{
	return max77686_ldo_mode(dev, PMIC_OP_SET, &mode);
	}

	static int max77686_buck_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);

	uc_pdata->type = REGULATOR_TYPE_BUCK;
	uc_pdata->mode_count = max77686_buck_modes(dev->driver_data,
	&uc_pdata->mode);

	return 0;
	}

	static int buck_get_value(struct udevice *dev)
	{
	int uV;
	int ret;

	ret = max77686_buck_val(dev, PMIC_OP_GET, &uV);
	if (ret)
	return ret;

	return uV;
	}

	static int buck_set_value(struct udevice *dev, int uV)
	{
	return max77686_buck_val(dev, PMIC_OP_SET, &uV);
	}

	static int buck_get_enable(struct udevice *dev)
	{
	bool enable = false;
	int ret;

	ret = max77686_buck_enable(dev, PMIC_OP_GET, &enable);
	if (ret)
	return ret;

	return enable;
	}

	static int buck_set_enable(struct udevice *dev, bool enable)
	{
	return max77686_buck_enable(dev, PMIC_OP_SET, &enable);
	}

	static int buck_get_mode(struct udevice *dev)
	{
	int mode;
	int ret;

	ret = max77686_buck_mode(dev, PMIC_OP_GET, &mode);
	if (ret)
	return ret;

	return mode;
	}

	static int buck_set_mode(struct udevice *dev, int mode)
	{
	return max77686_buck_mode(dev, PMIC_OP_SET, &mode);
	}

	static const struct dm_regulator_ops max77686_ldo_ops = {
	.get_value = ldo_get_value,
	.set_value = ldo_set_value,
	.get_enable = ldo_get_enable,
	.set_enable = ldo_set_enable,
	.get_mode = ldo_get_mode,
	.set_mode = ldo_set_mode,
	};

	U_BOOT_DRIVER(max77686_ldo) = {
	.name = MAX77686_LDO_DRIVER,
	.id = UCLASS_REGULATOR,
	.ops = &max77686_ldo_ops,
	.probe = max77686_ldo_probe,
	};

	static const struct dm_regulator_ops max77686_buck_ops = {
	.get_value = buck_get_value,
	.set_value = buck_set_value,
	.get_enable = buck_get_enable,
	.set_enable = buck_set_enable,
	.get_mode = buck_get_mode,
	.set_mode = buck_set_mode,
	};

	U_BOOT_DRIVER(max77686_buck) = {
	.name = MAX77686_BUCK_DRIVER,
	.id = UCLASS_REGULATOR,
	.ops = &max77686_buck_ops,
	.probe = max77686_buck_probe,
	};