drivers/power/regulator/stpmic1.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
 /*
  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
  * Author: Christophe Kerello <christophe.kerello@st.com>
  */

 #include <common.h>
 #include <dm.h>
 #include <errno.h>
 #include <linux/delay.h>
 #include <power/pmic.h>
 #include <power/regulator.h>
 #include <power/stpmic1.h>

 struct stpmic1_range {
 	int min_uv;
 	int min_sel;
 	int max_sel;
 	int step;
 };

 struct stpmic1_output {
 	const struct stpmic1_range *ranges;
 	int nbranges;
 };

 #define STPMIC1_MODE(_id, _val, _name) { \
 	.id = _id,			\
 	.register_value = _val,		\
 	.name = _name,			\
 }

 #define STPMIC1_RANGE(_min_uv, _min_sel, _max_sel, _step) { \
 	.min_uv = _min_uv,		\
 	.min_sel = _min_sel,		\
 	.max_sel = _max_sel,		\
 	.step = _step,			\
 }

 #define STPMIC1_OUTPUT(_ranges, _nbranges) { \
 	.ranges = _ranges,		\
 	.nbranges = _nbranges,		\
 }

 static int stpmic1_output_find_uv(int sel,
 				  const struct stpmic1_output *output)
 {
 	const struct stpmic1_range *range;
 	int i;

 	for (i = 0, range = output->ranges;
 	     i < output->nbranges; i++, range++) {
 		if (sel >= range->min_sel && sel <= range->max_sel)
 			return range->min_uv +
 			       (sel - range->min_sel) * range->step;
 	}

 	return -EINVAL;
 }

 static int stpmic1_output_find_sel(int uv,
 				   const struct stpmic1_output *output)
 {
 	const struct stpmic1_range *range;
 	int i;

 	for (i = 0, range = output->ranges;
 	     i < output->nbranges; i++, range++) {
 		if (uv == range->min_uv && !range->step)
 			return range->min_sel;

 		if (uv >= range->min_uv &&
 		    uv <= range->min_uv +
 			  (range->max_sel - range->min_sel) * range->step)
 			return range->min_sel +
 			       (uv - range->min_uv) / range->step;
 	}

 	return -EINVAL;
 }

 /*
  * BUCK regulators
  */

 static const struct stpmic1_range buck1_ranges[] = {
 	STPMIC1_RANGE(725000, 0, 4, 0),
 	STPMIC1_RANGE(725000, 5, 36, 25000),
 	STPMIC1_RANGE(1500000, 37, 63, 0),
 };

 static const struct stpmic1_range buck2_ranges[] = {
 	STPMIC1_RANGE(1000000, 0, 17, 0),
 	STPMIC1_RANGE(1050000, 18, 19, 0),
 	STPMIC1_RANGE(1100000, 20, 21, 0),
 	STPMIC1_RANGE(1150000, 22, 23, 0),
 	STPMIC1_RANGE(1200000, 24, 25, 0),
 	STPMIC1_RANGE(1250000, 26, 27, 0),
 	STPMIC1_RANGE(1300000, 28, 29, 0),
 	STPMIC1_RANGE(1350000, 30, 31, 0),
 	STPMIC1_RANGE(1400000, 32, 33, 0),
 	STPMIC1_RANGE(1450000, 34, 35, 0),
 	STPMIC1_RANGE(1500000, 36, 63, 0),
 };

 static const struct stpmic1_range buck3_ranges[] = {
 	STPMIC1_RANGE(1000000, 0, 19, 0),
 	STPMIC1_RANGE(1100000, 20, 23, 0),
 	STPMIC1_RANGE(1200000, 24, 27, 0),
 	STPMIC1_RANGE(1300000, 28, 31, 0),
 	STPMIC1_RANGE(1400000, 32, 35, 0),
 	STPMIC1_RANGE(1500000, 36, 55, 100000),
 	STPMIC1_RANGE(3400000, 56, 63, 0),
 };

 static const struct stpmic1_range buck4_ranges[] = {
 	STPMIC1_RANGE(600000, 0, 27, 25000),
 	STPMIC1_RANGE(1300000, 28, 29, 0),
 	STPMIC1_RANGE(1350000, 30, 31, 0),
 	STPMIC1_RANGE(1400000, 32, 33, 0),
 	STPMIC1_RANGE(1450000, 34, 35, 0),
 	STPMIC1_RANGE(1500000, 36, 60, 100000),
 	STPMIC1_RANGE(3900000, 61, 63, 0),
 };

 /* BUCK: 1,2,3,4 - voltage ranges */
 static const struct stpmic1_output buck_voltage_range[] = {
 	STPMIC1_OUTPUT(buck1_ranges, ARRAY_SIZE(buck1_ranges)),
 	STPMIC1_OUTPUT(buck2_ranges, ARRAY_SIZE(buck2_ranges)),
 	STPMIC1_OUTPUT(buck3_ranges, ARRAY_SIZE(buck3_ranges)),
 	STPMIC1_OUTPUT(buck4_ranges, ARRAY_SIZE(buck4_ranges)),
 };

 /* BUCK modes */
 static const struct dm_regulator_mode buck_modes[] = {
 	STPMIC1_MODE(STPMIC1_PREG_MODE_HP, STPMIC1_PREG_MODE_HP, "HP"),
 	STPMIC1_MODE(STPMIC1_PREG_MODE_LP, STPMIC1_PREG_MODE_LP, "LP"),
 };

 static int stpmic1_buck_get_uv(struct udevice *dev, int buck)
 {
 	int sel;

 	sel = pmic_reg_read(dev, STPMIC1_BUCKX_MAIN_CR(buck));
 	if (sel < 0)
 		return sel;

 	sel &= STPMIC1_BUCK_VOUT_MASK;
 	sel >>= STPMIC1_BUCK_VOUT_SHIFT;

 	return stpmic1_output_find_uv(sel, &buck_voltage_range[buck]);
 }

 static int stpmic1_buck_get_value(struct udevice *dev)
 {
 	return stpmic1_buck_get_uv(dev->parent, dev->driver_data - 1);
 }

 static int stpmic1_buck_set_value(struct udevice *dev, int uv)
 {
 	int sel, buck = dev->driver_data - 1;

 	sel = stpmic1_output_find_sel(uv, &buck_voltage_range[buck]);
 	if (sel < 0)
 		return sel;

 	return pmic_clrsetbits(dev->parent,
 			       STPMIC1_BUCKX_MAIN_CR(buck),
 			       STPMIC1_BUCK_VOUT_MASK,
 			       sel << STPMIC1_BUCK_VOUT_SHIFT);
 }

 static int stpmic1_buck_get_enable(struct udevice *dev)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent,
 			    STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
 	if (ret < 0)
 		return false;

 	return ret & STPMIC1_BUCK_ENA ? true : false;
 }

 static int stpmic1_buck_set_enable(struct udevice *dev, bool enable)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;
 	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
 			     STPMIC1_DEFAULT_STOP_DELAY_MS;
 	int ret, uv;

 	/* if regulator is already in the wanted state, nothing to do */
 	if (stpmic1_buck_get_enable(dev) == enable)
 		return 0;

 	if (enable) {
 		uc_pdata = dev_get_uclass_plat(dev);
 		uv = stpmic1_buck_get_value(dev);
 		if (uv < uc_pdata->min_uV || uv > uc_pdata->max_uV)
 			stpmic1_buck_set_value(dev, uc_pdata->min_uV);
 	}

 	ret = pmic_clrsetbits(dev->parent,
 			      STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
 			      STPMIC1_BUCK_ENA, enable ? STPMIC1_BUCK_ENA : 0);
 	mdelay(delay);

 	return ret;
 }

 static int stpmic1_buck_get_mode(struct udevice *dev)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent,
 			    STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
 	if (ret < 0)
 		return ret;

 	return ret & STPMIC1_BUCK_PREG_MODE ? STPMIC1_PREG_MODE_LP :
 					      STPMIC1_PREG_MODE_HP;
 }

 static int stpmic1_buck_set_mode(struct udevice *dev, int mode)
 {
 	return pmic_clrsetbits(dev->parent,
 			       STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
 			       STPMIC1_BUCK_PREG_MODE,
 			       mode ? STPMIC1_BUCK_PREG_MODE : 0);
 }

 static int stpmic1_buck_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;

 	if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_BUCK)
 		return -EINVAL;

 	uc_pdata = dev_get_uclass_plat(dev);

 	uc_pdata->type = REGULATOR_TYPE_BUCK;
 	uc_pdata->mode = (struct dm_regulator_mode *)buck_modes;
 	uc_pdata->mode_count = ARRAY_SIZE(buck_modes);

 	return 0;
 }

 static const struct dm_regulator_ops stpmic1_buck_ops = {
 	.get_value  = stpmic1_buck_get_value,
 	.set_value  = stpmic1_buck_set_value,
 	.get_enable = stpmic1_buck_get_enable,
 	.set_enable = stpmic1_buck_set_enable,
 	.get_mode   = stpmic1_buck_get_mode,
 	.set_mode   = stpmic1_buck_set_mode,
 };

 U_BOOT_DRIVER(stpmic1_buck) = {
 	.name = "stpmic1_buck",
 	.id = UCLASS_REGULATOR,
 	.ops = &stpmic1_buck_ops,
 	.probe = stpmic1_buck_probe,
 };

 /*
  * LDO regulators
  */

 static const struct stpmic1_range ldo12_ranges[] = {
 	STPMIC1_RANGE(1700000, 0, 7, 0),
 	STPMIC1_RANGE(1700000, 8, 24, 100000),
 	STPMIC1_RANGE(3300000, 25, 31, 0),
 };

 static const struct stpmic1_range ldo3_ranges[] = {
 	STPMIC1_RANGE(1700000, 0, 7, 0),
 	STPMIC1_RANGE(1700000, 8, 24, 100000),
 	STPMIC1_RANGE(3300000, 25, 30, 0),
 	/* Sel 31 is special case when LDO3 is in mode sync_source (BUCK2/2) */
 };

 static const struct stpmic1_range ldo5_ranges[] = {
 	STPMIC1_RANGE(1700000, 0, 7, 0),
 	STPMIC1_RANGE(1700000, 8, 30, 100000),
 	STPMIC1_RANGE(3900000, 31, 31, 0),
 };

 static const struct stpmic1_range ldo6_ranges[] = {
 	STPMIC1_RANGE(900000, 0, 24, 100000),
 	STPMIC1_RANGE(3300000, 25, 31, 0),
 };

 /* LDO: 1,2,3,4,5,6 - voltage ranges */
 static const struct stpmic1_output ldo_voltage_range[] = {
 	STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
 	STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
 	STPMIC1_OUTPUT(ldo3_ranges, ARRAY_SIZE(ldo3_ranges)),
 	STPMIC1_OUTPUT(NULL, 0),
 	STPMIC1_OUTPUT(ldo5_ranges, ARRAY_SIZE(ldo5_ranges)),
 	STPMIC1_OUTPUT(ldo6_ranges, ARRAY_SIZE(ldo6_ranges)),
 };

 /* LDO modes */
 static const struct dm_regulator_mode ldo_modes[] = {
 	STPMIC1_MODE(STPMIC1_LDO_MODE_NORMAL,
 		     STPMIC1_LDO_MODE_NORMAL, "NORMAL"),
 	STPMIC1_MODE(STPMIC1_LDO_MODE_BYPASS,
 		     STPMIC1_LDO_MODE_BYPASS, "BYPASS"),
 	STPMIC1_MODE(STPMIC1_LDO_MODE_SINK_SOURCE,
 		     STPMIC1_LDO_MODE_SINK_SOURCE, "SINK SOURCE"),
 };

 static int stpmic1_ldo_get_value(struct udevice *dev)
 {
 	int sel, ldo = dev->driver_data - 1;

 	sel = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
 	if (sel < 0)
 		return sel;

 	/* ldo4 => 3,3V */
 	if (ldo == STPMIC1_LDO4)
 		return STPMIC1_LDO4_UV;

 	sel &= STPMIC1_LDO12356_VOUT_MASK;
 	sel >>= STPMIC1_LDO12356_VOUT_SHIFT;

 	/* ldo3, sel = 31 => BUCK2/2 */
 	if (ldo == STPMIC1_LDO3 && sel == STPMIC1_LDO3_DDR_SEL)
 		return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;

 	return stpmic1_output_find_uv(sel, &ldo_voltage_range[ldo]);
 }

 static int stpmic1_ldo_set_value(struct udevice *dev, int uv)
 {
 	int sel, ldo = dev->driver_data - 1;

 	/* ldo4 => not possible */
 	if (ldo == STPMIC1_LDO4)
 		return -EINVAL;

 	sel = stpmic1_output_find_sel(uv, &ldo_voltage_range[ldo]);
 	if (sel < 0)
 		return sel;

 	return pmic_clrsetbits(dev->parent,
 			       STPMIC1_LDOX_MAIN_CR(ldo),
 			       STPMIC1_LDO12356_VOUT_MASK,
 			       sel << STPMIC1_LDO12356_VOUT_SHIFT);
 }

 static int stpmic1_ldo_get_enable(struct udevice *dev)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent,
 			    STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1));
 	if (ret < 0)
 		return false;

 	return ret & STPMIC1_LDO_ENA ? true : false;
 }

 static int stpmic1_ldo_set_enable(struct udevice *dev, bool enable)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;
 	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
 			     STPMIC1_DEFAULT_STOP_DELAY_MS;
 	int ret, uv;

 	/* if regulator is already in the wanted state, nothing to do */
 	if (stpmic1_ldo_get_enable(dev) == enable)
 		return 0;

 	if (enable) {
 		uc_pdata = dev_get_uclass_plat(dev);
 		uv = stpmic1_ldo_get_value(dev);
 		if (uv < uc_pdata->min_uV || uv > uc_pdata->max_uV)
 			stpmic1_ldo_set_value(dev, uc_pdata->min_uV);
 	}

 	ret = pmic_clrsetbits(dev->parent,
 			      STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1),
 			      STPMIC1_LDO_ENA, enable ? STPMIC1_LDO_ENA : 0);
 	mdelay(delay);

 	return ret;
 }

 static int stpmic1_ldo_get_mode(struct udevice *dev)
 {
 	int ret, ldo = dev->driver_data - 1;

 	if (ldo != STPMIC1_LDO3)
 		return -EINVAL;

 	ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
 	if (ret < 0)
 		return ret;

 	if (ret & STPMIC1_LDO3_MODE)
 		return STPMIC1_LDO_MODE_BYPASS;

 	ret &= STPMIC1_LDO12356_VOUT_MASK;
 	ret >>= STPMIC1_LDO12356_VOUT_SHIFT;

 	return ret == STPMIC1_LDO3_DDR_SEL ? STPMIC1_LDO_MODE_SINK_SOURCE :
 					     STPMIC1_LDO_MODE_NORMAL;
 }

 static int stpmic1_ldo_set_mode(struct udevice *dev, int mode)
 {
 	int ret, ldo = dev->driver_data - 1;

 	if (ldo != STPMIC1_LDO3)
 		return -EINVAL;

 	ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
 	if (ret < 0)
 		return ret;

 	switch (mode) {
 	case STPMIC1_LDO_MODE_SINK_SOURCE:
 		ret &= ~STPMIC1_LDO12356_VOUT_MASK;
 		ret |= STPMIC1_LDO3_DDR_SEL << STPMIC1_LDO12356_VOUT_SHIFT;
 		/* fallthrough */
 	case STPMIC1_LDO_MODE_NORMAL:
 		ret &= ~STPMIC1_LDO3_MODE;
 		break;
 	case STPMIC1_LDO_MODE_BYPASS:
 		ret |= STPMIC1_LDO3_MODE;
 		break;
 	}

 	return pmic_reg_write(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo), ret);
 }

 static int stpmic1_ldo_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;

 	if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_LDO)
 		return -EINVAL;

 	uc_pdata = dev_get_uclass_plat(dev);

 	uc_pdata->type = REGULATOR_TYPE_LDO;
 	if (dev->driver_data - 1 == STPMIC1_LDO3) {
 		uc_pdata->mode = (struct dm_regulator_mode *)ldo_modes;
 		uc_pdata->mode_count = ARRAY_SIZE(ldo_modes);
 	} else {
 		uc_pdata->mode_count = 0;
 	}

 	return 0;
 }

 static const struct dm_regulator_ops stpmic1_ldo_ops = {
 	.get_value  = stpmic1_ldo_get_value,
 	.set_value  = stpmic1_ldo_set_value,
 	.get_enable = stpmic1_ldo_get_enable,
 	.set_enable = stpmic1_ldo_set_enable,
 	.get_mode   = stpmic1_ldo_get_mode,
 	.set_mode   = stpmic1_ldo_set_mode,
 };

 U_BOOT_DRIVER(stpmic1_ldo) = {
 	.name = "stpmic1_ldo",
 	.id = UCLASS_REGULATOR,
 	.ops = &stpmic1_ldo_ops,
 	.probe = stpmic1_ldo_probe,
 };

 /*
  * VREF DDR regulator
  */

 static int stpmic1_vref_ddr_get_value(struct udevice *dev)
 {
 	/* BUCK2/2 */
 	return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;
 }

 static int stpmic1_vref_ddr_get_enable(struct udevice *dev)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent, STPMIC1_REFDDR_MAIN_CR);
 	if (ret < 0)
 		return false;

 	return ret & STPMIC1_VREF_ENA ? true : false;
 }

 static int stpmic1_vref_ddr_set_enable(struct udevice *dev, bool enable)
 {
 	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
 			     STPMIC1_DEFAULT_STOP_DELAY_MS;
 	int ret;

 	/* if regulator is already in the wanted state, nothing to do */
 	if (stpmic1_vref_ddr_get_enable(dev) == enable)
 		return 0;

 	ret = pmic_clrsetbits(dev->parent, STPMIC1_REFDDR_MAIN_CR,
 			      STPMIC1_VREF_ENA, enable ? STPMIC1_VREF_ENA : 0);
 	mdelay(delay);

 	return ret;
 }

 static int stpmic1_vref_ddr_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;

 	uc_pdata = dev_get_uclass_plat(dev);

 	uc_pdata->type = REGULATOR_TYPE_FIXED;
 	uc_pdata->mode_count = 0;

 	return 0;
 }

 static const struct dm_regulator_ops stpmic1_vref_ddr_ops = {
 	.get_value  = stpmic1_vref_ddr_get_value,
 	.get_enable = stpmic1_vref_ddr_get_enable,
 	.set_enable = stpmic1_vref_ddr_set_enable,
 };

 U_BOOT_DRIVER(stpmic1_vref_ddr) = {
 	.name = "stpmic1_vref_ddr",
 	.id = UCLASS_REGULATOR,
 	.ops = &stpmic1_vref_ddr_ops,
 	.probe = stpmic1_vref_ddr_probe,
 };

 /*
  * BOOST regulator
  */

 static int stpmic1_boost_get_enable(struct udevice *dev)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
 	if (ret < 0)
 		return false;

 	return ret & STPMIC1_BST_ON ? true : false;
 }

 static int stpmic1_boost_set_enable(struct udevice *dev, bool enable)
 {
 	int ret;

 	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
 	if (ret < 0)
 		return ret;

 	if (!enable && ret & STPMIC1_PWR_SW_ON)
 		return -EINVAL;

 	/* if regulator is already in the wanted state, nothing to do */
 	if (!!(ret & STPMIC1_BST_ON) == enable)
 		return 0;

 	ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
 			      STPMIC1_BST_ON,
 			      enable ? STPMIC1_BST_ON : 0);
 	if (enable)
 		mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);

 	return ret;
 }

 static int stpmic1_boost_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;

 	uc_pdata = dev_get_uclass_plat(dev);

 	uc_pdata->type = REGULATOR_TYPE_FIXED;
 	uc_pdata->mode_count = 0;

 	return 0;
 }

 static const struct dm_regulator_ops stpmic1_boost_ops = {
 	.get_enable = stpmic1_boost_get_enable,
 	.set_enable = stpmic1_boost_set_enable,
 };

 U_BOOT_DRIVER(stpmic1_boost) = {
 	.name = "stpmic1_boost",
 	.id = UCLASS_REGULATOR,
 	.ops = &stpmic1_boost_ops,
 	.probe = stpmic1_boost_probe,
 };

 /*
  * USB power switch
  */

 static int stpmic1_pwr_sw_get_enable(struct udevice *dev)
 {
 	uint mask = 1 << dev->driver_data;
 	int ret;

 	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
 	if (ret < 0)
 		return false;

 	return ret & mask ? true : false;
 }

 static int stpmic1_pwr_sw_set_enable(struct udevice *dev, bool enable)
 {
 	uint mask = 1 << dev->driver_data;
 	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
 			     STPMIC1_DEFAULT_STOP_DELAY_MS;
 	int ret;

 	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
 	if (ret < 0)
 		return ret;

 	/* if regulator is already in the wanted state, nothing to do */
 	if (!!(ret & mask) == enable)
 		return 0;

 	/* Boost management */
 	if (enable && !(ret & STPMIC1_BST_ON)) {
 		pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
 				STPMIC1_BST_ON, STPMIC1_BST_ON);
 		mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);
 	} else if (!enable && ret & STPMIC1_BST_ON &&
 		   (ret & STPMIC1_PWR_SW_ON) != STPMIC1_PWR_SW_ON) {
 		pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
 				STPMIC1_BST_ON, 0);
 	}

 	ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
 			      mask, enable ? mask : 0);
 	mdelay(delay);

 	return ret;
 }

 static int stpmic1_pwr_sw_probe(struct udevice *dev)
 {
 	struct dm_regulator_uclass_plat *uc_pdata;

 	if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_PWR_SW)
 		return -EINVAL;

 	uc_pdata = dev_get_uclass_plat(dev);

 	uc_pdata->type = REGULATOR_TYPE_FIXED;
 	uc_pdata->mode_count = 0;

 	return 0;
 }

 static const struct dm_regulator_ops stpmic1_pwr_sw_ops = {
 	.get_enable = stpmic1_pwr_sw_get_enable,
 	.set_enable = stpmic1_pwr_sw_set_enable,
 };

 U_BOOT_DRIVER(stpmic1_pwr_sw) = {
 	.name = "stpmic1_pwr_sw",
 	.id = UCLASS_REGULATOR,
 	.ops = &stpmic1_pwr_sw_ops,
 	.probe = stpmic1_pwr_sw_probe,
 };
	// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
	/*
	* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
	* Author: Christophe Kerello <christophe.kerello@st.com>
	*/

	#include <common.h>
	#include <dm.h>
	#include <errno.h>
	#include <linux/delay.h>
	#include <power/pmic.h>
	#include <power/regulator.h>
	#include <power/stpmic1.h>

	struct stpmic1_range {
	int min_uv;
	int min_sel;
	int max_sel;
	int step;
	};

	struct stpmic1_output {
	const struct stpmic1_range *ranges;
	int nbranges;
	};

	#define STPMIC1_MODE(_id, _val, _name) { \
	.id = _id, \
	.register_value = _val, \
	.name = _name, \
	}

	#define STPMIC1_RANGE(_min_uv, _min_sel, _max_sel, _step) { \
	.min_uv = _min_uv, \
	.min_sel = _min_sel, \
	.max_sel = _max_sel, \
	.step = _step, \
	}

	#define STPMIC1_OUTPUT(_ranges, _nbranges) { \
	.ranges = _ranges, \
	.nbranges = _nbranges, \
	}

	static int stpmic1_output_find_uv(int sel,
	const struct stpmic1_output *output)
	{
	const struct stpmic1_range *range;
	int i;

	for (i = 0, range = output->ranges;
	i < output->nbranges; i++, range++) {
	if (sel >= range->min_sel && sel <= range->max_sel)
	return range->min_uv +
	(sel - range->min_sel) * range->step;
	}

	return -EINVAL;
	}

	static int stpmic1_output_find_sel(int uv,
	const struct stpmic1_output *output)
	{
	const struct stpmic1_range *range;
	int i;

	for (i = 0, range = output->ranges;
	i < output->nbranges; i++, range++) {
	if (uv == range->min_uv && !range->step)
	return range->min_sel;

	if (uv >= range->min_uv &&
	uv <= range->min_uv +
	(range->max_sel - range->min_sel) * range->step)
	return range->min_sel +
	(uv - range->min_uv) / range->step;
	}

	return -EINVAL;
	}

	/*
	* BUCK regulators
	*/

	static const struct stpmic1_range buck1_ranges[] = {
	STPMIC1_RANGE(725000, 0, 4, 0),
	STPMIC1_RANGE(725000, 5, 36, 25000),
	STPMIC1_RANGE(1500000, 37, 63, 0),
	};

	static const struct stpmic1_range buck2_ranges[] = {
	STPMIC1_RANGE(1000000, 0, 17, 0),
	STPMIC1_RANGE(1050000, 18, 19, 0),
	STPMIC1_RANGE(1100000, 20, 21, 0),
	STPMIC1_RANGE(1150000, 22, 23, 0),
	STPMIC1_RANGE(1200000, 24, 25, 0),
	STPMIC1_RANGE(1250000, 26, 27, 0),
	STPMIC1_RANGE(1300000, 28, 29, 0),
	STPMIC1_RANGE(1350000, 30, 31, 0),
	STPMIC1_RANGE(1400000, 32, 33, 0),
	STPMIC1_RANGE(1450000, 34, 35, 0),
	STPMIC1_RANGE(1500000, 36, 63, 0),
	};

	static const struct stpmic1_range buck3_ranges[] = {
	STPMIC1_RANGE(1000000, 0, 19, 0),
	STPMIC1_RANGE(1100000, 20, 23, 0),
	STPMIC1_RANGE(1200000, 24, 27, 0),
	STPMIC1_RANGE(1300000, 28, 31, 0),
	STPMIC1_RANGE(1400000, 32, 35, 0),
	STPMIC1_RANGE(1500000, 36, 55, 100000),
	STPMIC1_RANGE(3400000, 56, 63, 0),
	};

	static const struct stpmic1_range buck4_ranges[] = {
	STPMIC1_RANGE(600000, 0, 27, 25000),
	STPMIC1_RANGE(1300000, 28, 29, 0),
	STPMIC1_RANGE(1350000, 30, 31, 0),
	STPMIC1_RANGE(1400000, 32, 33, 0),
	STPMIC1_RANGE(1450000, 34, 35, 0),
	STPMIC1_RANGE(1500000, 36, 60, 100000),
	STPMIC1_RANGE(3900000, 61, 63, 0),
	};

	/* BUCK: 1,2,3,4 - voltage ranges */
	static const struct stpmic1_output buck_voltage_range[] = {
	STPMIC1_OUTPUT(buck1_ranges, ARRAY_SIZE(buck1_ranges)),
	STPMIC1_OUTPUT(buck2_ranges, ARRAY_SIZE(buck2_ranges)),
	STPMIC1_OUTPUT(buck3_ranges, ARRAY_SIZE(buck3_ranges)),
	STPMIC1_OUTPUT(buck4_ranges, ARRAY_SIZE(buck4_ranges)),
	};

	/* BUCK modes */
	static const struct dm_regulator_mode buck_modes[] = {
	STPMIC1_MODE(STPMIC1_PREG_MODE_HP, STPMIC1_PREG_MODE_HP, "HP"),
	STPMIC1_MODE(STPMIC1_PREG_MODE_LP, STPMIC1_PREG_MODE_LP, "LP"),
	};

	static int stpmic1_buck_get_uv(struct udevice *dev, int buck)
	{
	int sel;

	sel = pmic_reg_read(dev, STPMIC1_BUCKX_MAIN_CR(buck));
	if (sel < 0)
	return sel;

	sel &= STPMIC1_BUCK_VOUT_MASK;
	sel >>= STPMIC1_BUCK_VOUT_SHIFT;

	return stpmic1_output_find_uv(sel, &buck_voltage_range[buck]);
	}

	static int stpmic1_buck_get_value(struct udevice *dev)
	{
	return stpmic1_buck_get_uv(dev->parent, dev->driver_data - 1);
	}

	static int stpmic1_buck_set_value(struct udevice *dev, int uv)
	{
	int sel, buck = dev->driver_data - 1;

	sel = stpmic1_output_find_sel(uv, &buck_voltage_range[buck]);
	if (sel < 0)
	return sel;

	return pmic_clrsetbits(dev->parent,
	STPMIC1_BUCKX_MAIN_CR(buck),
	STPMIC1_BUCK_VOUT_MASK,
	sel << STPMIC1_BUCK_VOUT_SHIFT);
	}

	static int stpmic1_buck_get_enable(struct udevice *dev)
	{
	int ret;

	ret = pmic_reg_read(dev->parent,
	STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
	if (ret < 0)
	return false;

	return ret & STPMIC1_BUCK_ENA ? true : false;
	}

	static int stpmic1_buck_set_enable(struct udevice *dev, bool enable)
	{
	struct dm_regulator_uclass_plat *uc_pdata;
	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
	STPMIC1_DEFAULT_STOP_DELAY_MS;
	int ret, uv;

	/* if regulator is already in the wanted state, nothing to do */
	if (stpmic1_buck_get_enable(dev) == enable)
	return 0;

	if (enable) {
	uc_pdata = dev_get_uclass_plat(dev);
	uv = stpmic1_buck_get_value(dev);
	if (uv < uc_pdata->min_uV \|\| uv > uc_pdata->max_uV)
	stpmic1_buck_set_value(dev, uc_pdata->min_uV);
	}

	ret = pmic_clrsetbits(dev->parent,
	STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
	STPMIC1_BUCK_ENA, enable ? STPMIC1_BUCK_ENA : 0);
	mdelay(delay);

	return ret;
	}

	static int stpmic1_buck_get_mode(struct udevice *dev)
	{
	int ret;

	ret = pmic_reg_read(dev->parent,
	STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
	if (ret < 0)
	return ret;

	return ret & STPMIC1_BUCK_PREG_MODE ? STPMIC1_PREG_MODE_LP :
	STPMIC1_PREG_MODE_HP;
	}

	static int stpmic1_buck_set_mode(struct udevice *dev, int mode)
	{
	return pmic_clrsetbits(dev->parent,
	STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
	STPMIC1_BUCK_PREG_MODE,
	mode ? STPMIC1_BUCK_PREG_MODE : 0);
	}

	static int stpmic1_buck_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_plat *uc_pdata;

	if (!dev->driver_data \|\| dev->driver_data > STPMIC1_MAX_BUCK)
	return -EINVAL;

	uc_pdata = dev_get_uclass_plat(dev);

	uc_pdata->type = REGULATOR_TYPE_BUCK;
	uc_pdata->mode = (struct dm_regulator_mode *)buck_modes;
	uc_pdata->mode_count = ARRAY_SIZE(buck_modes);

	return 0;
	}

	static const struct dm_regulator_ops stpmic1_buck_ops = {
	.get_value = stpmic1_buck_get_value,
	.set_value = stpmic1_buck_set_value,
	.get_enable = stpmic1_buck_get_enable,
	.set_enable = stpmic1_buck_set_enable,
	.get_mode = stpmic1_buck_get_mode,
	.set_mode = stpmic1_buck_set_mode,
	};

	U_BOOT_DRIVER(stpmic1_buck) = {
	.name = "stpmic1_buck",
	.id = UCLASS_REGULATOR,
	.ops = &stpmic1_buck_ops,
	.probe = stpmic1_buck_probe,
	};

	/*
	* LDO regulators
	*/

	static const struct stpmic1_range ldo12_ranges[] = {
	STPMIC1_RANGE(1700000, 0, 7, 0),
	STPMIC1_RANGE(1700000, 8, 24, 100000),
	STPMIC1_RANGE(3300000, 25, 31, 0),
	};

	static const struct stpmic1_range ldo3_ranges[] = {
	STPMIC1_RANGE(1700000, 0, 7, 0),
	STPMIC1_RANGE(1700000, 8, 24, 100000),
	STPMIC1_RANGE(3300000, 25, 30, 0),
	/* Sel 31 is special case when LDO3 is in mode sync_source (BUCK2/2) */
	};

	static const struct stpmic1_range ldo5_ranges[] = {
	STPMIC1_RANGE(1700000, 0, 7, 0),
	STPMIC1_RANGE(1700000, 8, 30, 100000),
	STPMIC1_RANGE(3900000, 31, 31, 0),
	};

	static const struct stpmic1_range ldo6_ranges[] = {
	STPMIC1_RANGE(900000, 0, 24, 100000),
	STPMIC1_RANGE(3300000, 25, 31, 0),
	};

	/* LDO: 1,2,3,4,5,6 - voltage ranges */
	static const struct stpmic1_output ldo_voltage_range[] = {
	STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
	STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
	STPMIC1_OUTPUT(ldo3_ranges, ARRAY_SIZE(ldo3_ranges)),
	STPMIC1_OUTPUT(NULL, 0),
	STPMIC1_OUTPUT(ldo5_ranges, ARRAY_SIZE(ldo5_ranges)),
	STPMIC1_OUTPUT(ldo6_ranges, ARRAY_SIZE(ldo6_ranges)),
	};

	/* LDO modes */
	static const struct dm_regulator_mode ldo_modes[] = {
	STPMIC1_MODE(STPMIC1_LDO_MODE_NORMAL,
	STPMIC1_LDO_MODE_NORMAL, "NORMAL"),
	STPMIC1_MODE(STPMIC1_LDO_MODE_BYPASS,
	STPMIC1_LDO_MODE_BYPASS, "BYPASS"),
	STPMIC1_MODE(STPMIC1_LDO_MODE_SINK_SOURCE,
	STPMIC1_LDO_MODE_SINK_SOURCE, "SINK SOURCE"),
	};

	static int stpmic1_ldo_get_value(struct udevice *dev)
	{
	int sel, ldo = dev->driver_data - 1;

	sel = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
	if (sel < 0)
	return sel;

	/* ldo4 => 3,3V */
	if (ldo == STPMIC1_LDO4)
	return STPMIC1_LDO4_UV;

	sel &= STPMIC1_LDO12356_VOUT_MASK;
	sel >>= STPMIC1_LDO12356_VOUT_SHIFT;

	/* ldo3, sel = 31 => BUCK2/2 */
	if (ldo == STPMIC1_LDO3 && sel == STPMIC1_LDO3_DDR_SEL)
	return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;

	return stpmic1_output_find_uv(sel, &ldo_voltage_range[ldo]);
	}

	static int stpmic1_ldo_set_value(struct udevice *dev, int uv)
	{
	int sel, ldo = dev->driver_data - 1;

	/* ldo4 => not possible */
	if (ldo == STPMIC1_LDO4)
	return -EINVAL;

	sel = stpmic1_output_find_sel(uv, &ldo_voltage_range[ldo]);
	if (sel < 0)
	return sel;

	return pmic_clrsetbits(dev->parent,
	STPMIC1_LDOX_MAIN_CR(ldo),
	STPMIC1_LDO12356_VOUT_MASK,
	sel << STPMIC1_LDO12356_VOUT_SHIFT);
	}

	static int stpmic1_ldo_get_enable(struct udevice *dev)
	{
	int ret;

	ret = pmic_reg_read(dev->parent,
	STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1));
	if (ret < 0)
	return false;

	return ret & STPMIC1_LDO_ENA ? true : false;
	}

	static int stpmic1_ldo_set_enable(struct udevice *dev, bool enable)
	{
	struct dm_regulator_uclass_plat *uc_pdata;
	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
	STPMIC1_DEFAULT_STOP_DELAY_MS;
	int ret, uv;

	/* if regulator is already in the wanted state, nothing to do */
	if (stpmic1_ldo_get_enable(dev) == enable)
	return 0;

	if (enable) {
	uc_pdata = dev_get_uclass_plat(dev);
	uv = stpmic1_ldo_get_value(dev);
	if (uv < uc_pdata->min_uV \|\| uv > uc_pdata->max_uV)
	stpmic1_ldo_set_value(dev, uc_pdata->min_uV);
	}

	ret = pmic_clrsetbits(dev->parent,
	STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1),
	STPMIC1_LDO_ENA, enable ? STPMIC1_LDO_ENA : 0);
	mdelay(delay);

	return ret;
	}

	static int stpmic1_ldo_get_mode(struct udevice *dev)
	{
	int ret, ldo = dev->driver_data - 1;

	if (ldo != STPMIC1_LDO3)
	return -EINVAL;

	ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
	if (ret < 0)
	return ret;

	if (ret & STPMIC1_LDO3_MODE)
	return STPMIC1_LDO_MODE_BYPASS;

	ret &= STPMIC1_LDO12356_VOUT_MASK;
	ret >>= STPMIC1_LDO12356_VOUT_SHIFT;

	return ret == STPMIC1_LDO3_DDR_SEL ? STPMIC1_LDO_MODE_SINK_SOURCE :
	STPMIC1_LDO_MODE_NORMAL;
	}

	static int stpmic1_ldo_set_mode(struct udevice *dev, int mode)
	{
	int ret, ldo = dev->driver_data - 1;

	if (ldo != STPMIC1_LDO3)
	return -EINVAL;

	ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
	if (ret < 0)
	return ret;

	switch (mode) {
	case STPMIC1_LDO_MODE_SINK_SOURCE:
	ret &= ~STPMIC1_LDO12356_VOUT_MASK;
	ret \|= STPMIC1_LDO3_DDR_SEL << STPMIC1_LDO12356_VOUT_SHIFT;
	/* fallthrough */
	case STPMIC1_LDO_MODE_NORMAL:
	ret &= ~STPMIC1_LDO3_MODE;
	break;
	case STPMIC1_LDO_MODE_BYPASS:
	ret \|= STPMIC1_LDO3_MODE;
	break;
	}

	return pmic_reg_write(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo), ret);
	}

	static int stpmic1_ldo_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_plat *uc_pdata;

	if (!dev->driver_data \|\| dev->driver_data > STPMIC1_MAX_LDO)
	return -EINVAL;

	uc_pdata = dev_get_uclass_plat(dev);

	uc_pdata->type = REGULATOR_TYPE_LDO;
	if (dev->driver_data - 1 == STPMIC1_LDO3) {
	uc_pdata->mode = (struct dm_regulator_mode *)ldo_modes;
	uc_pdata->mode_count = ARRAY_SIZE(ldo_modes);
	} else {
	uc_pdata->mode_count = 0;
	}

	return 0;
	}

	static const struct dm_regulator_ops stpmic1_ldo_ops = {
	.get_value = stpmic1_ldo_get_value,
	.set_value = stpmic1_ldo_set_value,
	.get_enable = stpmic1_ldo_get_enable,
	.set_enable = stpmic1_ldo_set_enable,
	.get_mode = stpmic1_ldo_get_mode,
	.set_mode = stpmic1_ldo_set_mode,
	};

	U_BOOT_DRIVER(stpmic1_ldo) = {
	.name = "stpmic1_ldo",
	.id = UCLASS_REGULATOR,
	.ops = &stpmic1_ldo_ops,
	.probe = stpmic1_ldo_probe,
	};

	/*
	* VREF DDR regulator
	*/

	static int stpmic1_vref_ddr_get_value(struct udevice *dev)
	{
	/* BUCK2/2 */
	return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;
	}

	static int stpmic1_vref_ddr_get_enable(struct udevice *dev)
	{
	int ret;

	ret = pmic_reg_read(dev->parent, STPMIC1_REFDDR_MAIN_CR);
	if (ret < 0)
	return false;

	return ret & STPMIC1_VREF_ENA ? true : false;
	}

	static int stpmic1_vref_ddr_set_enable(struct udevice *dev, bool enable)
	{
	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
	STPMIC1_DEFAULT_STOP_DELAY_MS;
	int ret;

	/* if regulator is already in the wanted state, nothing to do */
	if (stpmic1_vref_ddr_get_enable(dev) == enable)
	return 0;

	ret = pmic_clrsetbits(dev->parent, STPMIC1_REFDDR_MAIN_CR,
	STPMIC1_VREF_ENA, enable ? STPMIC1_VREF_ENA : 0);
	mdelay(delay);

	return ret;
	}

	static int stpmic1_vref_ddr_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_plat *uc_pdata;

	uc_pdata = dev_get_uclass_plat(dev);

	uc_pdata->type = REGULATOR_TYPE_FIXED;
	uc_pdata->mode_count = 0;

	return 0;
	}

	static const struct dm_regulator_ops stpmic1_vref_ddr_ops = {
	.get_value = stpmic1_vref_ddr_get_value,
	.get_enable = stpmic1_vref_ddr_get_enable,
	.set_enable = stpmic1_vref_ddr_set_enable,
	};

	U_BOOT_DRIVER(stpmic1_vref_ddr) = {
	.name = "stpmic1_vref_ddr",
	.id = UCLASS_REGULATOR,
	.ops = &stpmic1_vref_ddr_ops,
	.probe = stpmic1_vref_ddr_probe,
	};

	/*
	* BOOST regulator
	*/

	static int stpmic1_boost_get_enable(struct udevice *dev)
	{
	int ret;

	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
	if (ret < 0)
	return false;

	return ret & STPMIC1_BST_ON ? true : false;
	}

	static int stpmic1_boost_set_enable(struct udevice *dev, bool enable)
	{
	int ret;

	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
	if (ret < 0)
	return ret;

	if (!enable && ret & STPMIC1_PWR_SW_ON)
	return -EINVAL;

	/* if regulator is already in the wanted state, nothing to do */
	if (!!(ret & STPMIC1_BST_ON) == enable)
	return 0;

	ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
	STPMIC1_BST_ON,
	enable ? STPMIC1_BST_ON : 0);
	if (enable)
	mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);

	return ret;
	}

	static int stpmic1_boost_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_plat *uc_pdata;

	uc_pdata = dev_get_uclass_plat(dev);

	uc_pdata->type = REGULATOR_TYPE_FIXED;
	uc_pdata->mode_count = 0;

	return 0;
	}

	static const struct dm_regulator_ops stpmic1_boost_ops = {
	.get_enable = stpmic1_boost_get_enable,
	.set_enable = stpmic1_boost_set_enable,
	};

	U_BOOT_DRIVER(stpmic1_boost) = {
	.name = "stpmic1_boost",
	.id = UCLASS_REGULATOR,
	.ops = &stpmic1_boost_ops,
	.probe = stpmic1_boost_probe,
	};

	/*
	* USB power switch
	*/

	static int stpmic1_pwr_sw_get_enable(struct udevice *dev)
	{
	uint mask = 1 << dev->driver_data;
	int ret;

	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
	if (ret < 0)
	return false;

	return ret & mask ? true : false;
	}

	static int stpmic1_pwr_sw_set_enable(struct udevice *dev, bool enable)
	{
	uint mask = 1 << dev->driver_data;
	int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
	STPMIC1_DEFAULT_STOP_DELAY_MS;
	int ret;

	ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
	if (ret < 0)
	return ret;

	/* if regulator is already in the wanted state, nothing to do */
	if (!!(ret & mask) == enable)
	return 0;

	/* Boost management */
	if (enable && !(ret & STPMIC1_BST_ON)) {
	pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
	STPMIC1_BST_ON, STPMIC1_BST_ON);
	mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);
	} else if (!enable && ret & STPMIC1_BST_ON &&
	(ret & STPMIC1_PWR_SW_ON) != STPMIC1_PWR_SW_ON) {
	pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
	STPMIC1_BST_ON, 0);
	}

	ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
	mask, enable ? mask : 0);
	mdelay(delay);

	return ret;
	}

	static int stpmic1_pwr_sw_probe(struct udevice *dev)
	{
	struct dm_regulator_uclass_plat *uc_pdata;

	if (!dev->driver_data \|\| dev->driver_data > STPMIC1_MAX_PWR_SW)
	return -EINVAL;

	uc_pdata = dev_get_uclass_plat(dev);

	uc_pdata->type = REGULATOR_TYPE_FIXED;
	uc_pdata->mode_count = 0;

	return 0;
	}

	static const struct dm_regulator_ops stpmic1_pwr_sw_ops = {
	.get_enable = stpmic1_pwr_sw_get_enable,
	.set_enable = stpmic1_pwr_sw_set_enable,
	};

	U_BOOT_DRIVER(stpmic1_pwr_sw) = {
	.name = "stpmic1_pwr_sw",
	.id = UCLASS_REGULATOR,
	.ops = &stpmic1_pwr_sw_ops,
	.probe = stpmic1_pwr_sw_probe,
	};