drivers/regulator/max77802-regulator.c - linux/kernel/git/bpf/bpf-next - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 //
 // max77802.c - Regulator driver for the Maxim 77802
 //
 // Copyright (C) 2013-2014 Google, Inc
 // Simon Glass <sjg@chromium.org>
 //
 // Copyright (C) 2012 Samsung Electronics
 // Chiwoong Byun <woong.byun@samsung.com>
 // Jonghwa Lee <jonghwa3.lee@samsung.com>
 //
 // This driver is based on max8997.c

 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/mfd/max77686.h>
 #include <linux/mfd/max77686-private.h>
 #include <dt-bindings/regulator/maxim,max77802.h>

 /* Default ramp delay in case it is not manually set */
 #define MAX77802_RAMP_DELAY		100000		/* uV/us */

 #define MAX77802_OPMODE_SHIFT_LDO	6
 #define MAX77802_OPMODE_BUCK234_SHIFT	4
 #define MAX77802_OPMODE_MASK		0x3

 #define MAX77802_VSEL_MASK		0x3F
 #define MAX77802_DVS_VSEL_MASK		0xFF

 #define MAX77802_RAMP_RATE_MASK_2BIT	0xC0
 #define MAX77802_RAMP_RATE_SHIFT_2BIT	6
 #define MAX77802_RAMP_RATE_MASK_4BIT	0xF0
 #define MAX77802_RAMP_RATE_SHIFT_4BIT	4

 #define MAX77802_STATUS_OFF		0x0
 #define MAX77802_OFF_PWRREQ		0x1
 #define MAX77802_LP_PWRREQ		0x2

 static const unsigned int max77802_buck234_ramp_table[] = {
 	12500,
 	25000,
 	50000,
 	100000,
 };

 static const unsigned int max77802_buck16_ramp_table[] = {
 	1000,	2000,	3030,	4000,
 	5000,	5880,	7140,	8330,
 	9090,	10000,	11110,	12500,
 	16670,	25000,	50000,	100000,
 };

 struct max77802_regulator_prv {
 	/* Array indexed by regulator id */
 	unsigned int opmode[MAX77802_REG_MAX];
 };

 static inline unsigned int max77802_map_mode(unsigned int mode)
 {
 	return mode == MAX77802_OPMODE_NORMAL ?
 		REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
 }

 static int max77802_get_opmode_shift(int id)
 {
 	if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
 				     id <= MAX77802_BUCK10))
 		return 0;

 	if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
 		return MAX77802_OPMODE_BUCK234_SHIFT;

 	if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
 		return MAX77802_OPMODE_SHIFT_LDO;

 	return -EINVAL;
 }

 /**
  * max77802_set_suspend_disable - Disable the regulator during system suspend
  * @rdev: regulator to mark as disabled
  *
  * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
  * Configure the regulator so the PMIC will turn it OFF during system suspend.
  */
 static int max77802_set_suspend_disable(struct regulator_dev *rdev)
 {
 	unsigned int val = MAX77802_OFF_PWRREQ;
 	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	int shift = max77802_get_opmode_shift(id);

 	max77802->opmode[id] = val;
 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 				  rdev->desc->enable_mask, val << shift);
 }

 /*
  * Some LDOs support Low Power Mode while the system is running.
  *
  * LDOs 1, 3, 20, 21.
  */
 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
 {
 	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	unsigned int val;
 	int shift = max77802_get_opmode_shift(id);

 	switch (mode) {
 	case REGULATOR_MODE_STANDBY:
 		val = MAX77802_OPMODE_LP;	/* ON in Low Power Mode */
 		break;
 	case REGULATOR_MODE_NORMAL:
 		val = MAX77802_OPMODE_NORMAL;	/* ON in Normal Mode */
 		break;
 	default:
 		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 			 rdev->desc->name, mode);
 		return -EINVAL;
 	}

 	max77802->opmode[id] = val;
 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 				  rdev->desc->enable_mask, val << shift);
 }

 static unsigned max77802_get_mode(struct regulator_dev *rdev)
 {
 	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);

 	return max77802_map_mode(max77802->opmode[id]);
 }

 /**
  * max77802_set_suspend_mode - set regulator opmode when the system is suspended
  * @rdev: regulator to change mode
  * @mode: operating mode to be set
  *
  * Will set the operating mode for the regulators during system suspend.
  * This function is valid for the three different enable control logics:
  *
  * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
  * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
  * Enable Control Logic3 by PWRREQ (LDO 3)
  *
  * If setting the regulator mode fails, the function only warns but does
  * not return an error code to avoid the regulator core to stop setting
  * the operating mode for the remaining regulators.
  */
 static int max77802_set_suspend_mode(struct regulator_dev *rdev,
 				     unsigned int mode)
 {
 	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	unsigned int val;
 	int shift = max77802_get_opmode_shift(id);

 	/*
 	 * If the regulator has been disabled for suspend
 	 * then is invalid to try setting a suspend mode.
 	 */
 	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
 		dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
 			 rdev->desc->name, mode);
 		return 0;
 	}

 	switch (mode) {
 	case REGULATOR_MODE_STANDBY:
 		/*
 		 * If the regulator opmode is normal then enable
 		 * ON in Low Power Mode by PWRREQ. If the mode is
 		 * already Low Power then no action is required.
 		 */
 		if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
 			val = MAX77802_LP_PWRREQ;
 		else
 			return 0;
 		break;
 	case REGULATOR_MODE_NORMAL:
 		/*
 		 * If the regulator operating mode is Low Power then
 		 * normal is not a valid opmode in suspend. If the
 		 * mode is already normal then no action is required.
 		 */
 		if (max77802->opmode[id] == MAX77802_OPMODE_LP)
 			dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
 				 rdev->desc->name, mode);
 		return 0;
 	default:
 		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 			 rdev->desc->name, mode);
 		return -EINVAL;
 	}

 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 				  rdev->desc->enable_mask, val << shift);
 }

 static int max77802_enable(struct regulator_dev *rdev)
 {
 	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	int shift = max77802_get_opmode_shift(id);

 	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
 		max77802->opmode[id] = MAX77802_OPMODE_NORMAL;

 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 				  rdev->desc->enable_mask,
 				  max77802->opmode[id] << shift);
 }

 /*
  * LDOs 2, 4-19, 22-35
  */
 static const struct regulator_ops max77802_ldo_ops_logic1 = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= max77802_enable,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 	.set_suspend_disable	= max77802_set_suspend_disable,
 	.set_suspend_mode	= max77802_set_suspend_mode,
 };

 /*
  * LDOs 1, 20, 21, 3
  */
 static const struct regulator_ops max77802_ldo_ops_logic2 = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= max77802_enable,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 	.set_mode		= max77802_set_mode,
 	.get_mode		= max77802_get_mode,
 	.set_suspend_mode	= max77802_set_suspend_mode,
 };

 /* BUCKS 1, 6 */
 static const struct regulator_ops max77802_buck_16_dvs_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= max77802_enable,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 	.set_ramp_delay		= regulator_set_ramp_delay_regmap,
 	.set_suspend_disable	= max77802_set_suspend_disable,
 };

 /* BUCKs 2-4 */
 static const struct regulator_ops max77802_buck_234_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= max77802_enable,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 	.set_ramp_delay		= regulator_set_ramp_delay_regmap,
 	.set_suspend_disable	= max77802_set_suspend_disable,
 	.set_suspend_mode	= max77802_set_suspend_mode,
 };

 /* BUCKs 5, 7-10 */
 static const struct regulator_ops max77802_buck_dvs_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= max77802_enable,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 	.set_suspend_disable	= max77802_set_suspend_disable,
 };

 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
 #define regulator_77802_desc_p_ldo(num, supply, log)	{		\
 	.name		= "LDO"#num,					\
 	.of_match	= of_match_ptr("LDO"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_LDO##num,				\
 	.supply_name	= "inl"#supply,					\
 	.ops		= &max77802_ldo_ops_logic##log,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 800000,					\
 	.uV_step	= 50000,					\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 1 << 6,					\
 	.vsel_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
 	.vsel_mask	= MAX77802_VSEL_MASK,				\
 	.enable_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
 	.enable_mask	= MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 	.of_map_mode	= max77802_map_mode,				\
 }

 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
 #define regulator_77802_desc_n_ldo(num, supply, log)   {		\
 	.name		= "LDO"#num,					\
 	.of_match	= of_match_ptr("LDO"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_LDO##num,				\
 	.supply_name	= "inl"#supply,					\
 	.ops		= &max77802_ldo_ops_logic##log,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 800000,					\
 	.uV_step	= 25000,					\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 1 << 6,					\
 	.vsel_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
 	.vsel_mask	= MAX77802_VSEL_MASK,				\
 	.enable_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
 	.enable_mask	= MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 	.of_map_mode	= max77802_map_mode,				\
 }

 /* BUCKs 1, 6 */
 #define regulator_77802_desc_16_buck(num)	{		\
 	.name		= "BUCK"#num,					\
 	.of_match	= of_match_ptr("BUCK"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_BUCK##num,				\
 	.supply_name	= "inb"#num,					\
 	.ops		= &max77802_buck_16_dvs_ops,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 612500,					\
 	.uV_step	= 6250,						\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 1 << 8,					\
 	.vsel_reg	= MAX77802_REG_BUCK ## num ## DVS1,		\
 	.vsel_mask	= MAX77802_DVS_VSEL_MASK,			\
 	.enable_reg	= MAX77802_REG_BUCK ## num ## CTRL,		\
 	.enable_mask	= MAX77802_OPMODE_MASK,				\
 	.ramp_reg	= MAX77802_REG_BUCK ## num ## CTRL,		\
 	.ramp_mask	= MAX77802_RAMP_RATE_MASK_4BIT,			\
 	.ramp_delay_table = max77802_buck16_ramp_table,			\
 	.n_ramp_values	= ARRAY_SIZE(max77802_buck16_ramp_table),	\
 	.of_map_mode	= max77802_map_mode,				\
 }

 /* BUCKS 2-4 */
 #define regulator_77802_desc_234_buck(num)	{		\
 	.name		= "BUCK"#num,					\
 	.of_match	= of_match_ptr("BUCK"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_BUCK##num,				\
 	.supply_name	= "inb"#num,					\
 	.ops		= &max77802_buck_234_ops,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 600000,					\
 	.uV_step	= 6250,						\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 0x91,						\
 	.vsel_reg	= MAX77802_REG_BUCK ## num ## DVS1,		\
 	.vsel_mask	= MAX77802_DVS_VSEL_MASK,			\
 	.enable_reg	= MAX77802_REG_BUCK ## num ## CTRL1,		\
 	.enable_mask	= MAX77802_OPMODE_MASK <<			\
 				MAX77802_OPMODE_BUCK234_SHIFT,		\
 	.ramp_reg	= MAX77802_REG_BUCK ## num ## CTRL1,		\
 	.ramp_mask	= MAX77802_RAMP_RATE_MASK_2BIT,			\
 	.ramp_delay_table = max77802_buck234_ramp_table,		\
 	.n_ramp_values	= ARRAY_SIZE(max77802_buck234_ramp_table),	\
 	.of_map_mode	= max77802_map_mode,				\
 }

 /* BUCK 5 */
 #define regulator_77802_desc_buck5(num)		{		\
 	.name		= "BUCK"#num,					\
 	.of_match	= of_match_ptr("BUCK"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_BUCK##num,				\
 	.supply_name	= "inb"#num,					\
 	.ops		= &max77802_buck_dvs_ops,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 750000,					\
 	.uV_step	= 50000,					\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 1 << 6,					\
 	.vsel_reg	= MAX77802_REG_BUCK5OUT,			\
 	.vsel_mask	= MAX77802_VSEL_MASK,				\
 	.enable_reg	= MAX77802_REG_BUCK5CTRL,			\
 	.enable_mask	= MAX77802_OPMODE_MASK,				\
 	.of_map_mode	= max77802_map_mode,				\
 }

 /* BUCKs 7-10 */
 #define regulator_77802_desc_buck7_10(num)	{		\
 	.name		= "BUCK"#num,					\
 	.of_match	= of_match_ptr("BUCK"#num),			\
 	.regulators_node	= of_match_ptr("regulators"),		\
 	.id		= MAX77802_BUCK##num,				\
 	.supply_name	= "inb"#num,					\
 	.ops		= &max77802_buck_dvs_ops,			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.min_uV		= 750000,					\
 	.uV_step	= 50000,					\
 	.ramp_delay	= MAX77802_RAMP_DELAY,				\
 	.n_voltages	= 1 << 6,					\
 	.vsel_reg	= MAX77802_REG_BUCK7OUT + (num - 7) * 3,	\
 	.vsel_mask	= MAX77802_VSEL_MASK,				\
 	.enable_reg	= MAX77802_REG_BUCK7CTRL + (num - 7) * 3,	\
 	.enable_mask	= MAX77802_OPMODE_MASK,				\
 	.of_map_mode	= max77802_map_mode,				\
 }

 static const struct regulator_desc regulators[] = {
 	regulator_77802_desc_16_buck(1),
 	regulator_77802_desc_234_buck(2),
 	regulator_77802_desc_234_buck(3),
 	regulator_77802_desc_234_buck(4),
 	regulator_77802_desc_buck5(5),
 	regulator_77802_desc_16_buck(6),
 	regulator_77802_desc_buck7_10(7),
 	regulator_77802_desc_buck7_10(8),
 	regulator_77802_desc_buck7_10(9),
 	regulator_77802_desc_buck7_10(10),
 	regulator_77802_desc_n_ldo(1, 10, 2),
 	regulator_77802_desc_n_ldo(2, 10, 1),
 	regulator_77802_desc_p_ldo(3, 3, 2),
 	regulator_77802_desc_p_ldo(4, 6, 1),
 	regulator_77802_desc_p_ldo(5, 3, 1),
 	regulator_77802_desc_p_ldo(6, 3, 1),
 	regulator_77802_desc_p_ldo(7, 3, 1),
 	regulator_77802_desc_n_ldo(8, 1, 1),
 	regulator_77802_desc_p_ldo(9, 5, 1),
 	regulator_77802_desc_p_ldo(10, 4, 1),
 	regulator_77802_desc_p_ldo(11, 4, 1),
 	regulator_77802_desc_p_ldo(12, 9, 1),
 	regulator_77802_desc_p_ldo(13, 4, 1),
 	regulator_77802_desc_p_ldo(14, 4, 1),
 	regulator_77802_desc_n_ldo(15, 1, 1),
 	regulator_77802_desc_n_ldo(17, 2, 1),
 	regulator_77802_desc_p_ldo(18, 7, 1),
 	regulator_77802_desc_p_ldo(19, 5, 1),
 	regulator_77802_desc_p_ldo(20, 7, 2),
 	regulator_77802_desc_p_ldo(21, 6, 2),
 	regulator_77802_desc_p_ldo(23, 9, 1),
 	regulator_77802_desc_p_ldo(24, 6, 1),
 	regulator_77802_desc_p_ldo(25, 9, 1),
 	regulator_77802_desc_p_ldo(26, 9, 1),
 	regulator_77802_desc_n_ldo(27, 2, 1),
 	regulator_77802_desc_p_ldo(28, 7, 1),
 	regulator_77802_desc_p_ldo(29, 7, 1),
 	regulator_77802_desc_n_ldo(30, 2, 1),
 	regulator_77802_desc_p_ldo(32, 9, 1),
 	regulator_77802_desc_p_ldo(33, 6, 1),
 	regulator_77802_desc_p_ldo(34, 9, 1),
 	regulator_77802_desc_n_ldo(35, 2, 1),
 };

 static int max77802_pmic_probe(struct platform_device *pdev)
 {
 	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	struct max77802_regulator_prv *max77802;
 	int i, val;
 	struct regulator_config config = { };

 	max77802 = devm_kzalloc(&pdev->dev,
 				sizeof(struct max77802_regulator_prv),
 				GFP_KERNEL);
 	if (!max77802)
 		return -ENOMEM;

 	config.dev = iodev->dev;
 	config.regmap = iodev->regmap;
 	config.driver_data = max77802;
 	platform_set_drvdata(pdev, max77802);

 	for (i = 0; i < MAX77802_REG_MAX; i++) {
 		struct regulator_dev *rdev;
 		int id = regulators[i].id;
 		int shift = max77802_get_opmode_shift(id);
 		int ret;

 		ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
 		if (ret < 0) {
 			dev_warn(&pdev->dev,
 				"cannot read current mode for %d\n", i);
 			val = MAX77802_OPMODE_NORMAL;
 		} else {
 			val = val >> shift & MAX77802_OPMODE_MASK;
 		}

 		/*
 		 * If the regulator is disabled and the system warm rebooted,
 		 * the hardware reports OFF as the regulator operating mode.
 		 * Default to operating mode NORMAL in that case.
 		 */
 		if (val == MAX77802_STATUS_OFF)
 			max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
 		else
 			max77802->opmode[id] = val;

 		rdev = devm_regulator_register(&pdev->dev,
 					       &regulators[i], &config);
 		if (IS_ERR(rdev)) {
 			ret = PTR_ERR(rdev);
 			dev_err(&pdev->dev,
 				"regulator init failed for %d: %d\n", i, ret);
 			return ret;
 		}
 	}

 	return 0;
 }

 static const struct platform_device_id max77802_pmic_id[] = {
 	{"max77802-pmic", 0},
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, max77802_pmic_id);

 static struct platform_driver max77802_pmic_driver = {
 	.driver = {
 		.name = "max77802-pmic",
 	},
 	.probe = max77802_pmic_probe,
 	.id_table = max77802_pmic_id,
 };

 module_platform_driver(max77802_pmic_driver);

 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	//
	// max77802.c - Regulator driver for the Maxim 77802
	//
	// Copyright (C) 2013-2014 Google, Inc
	// Simon Glass <sjg@chromium.org>
	//
	// Copyright (C) 2012 Samsung Electronics
	// Chiwoong Byun <woong.byun@samsung.com>
	// Jonghwa Lee <jonghwa3.lee@samsung.com>
	//
	// This driver is based on max8997.c

	#include <linux/kernel.h>
	#include <linux/bug.h>
	#include <linux/err.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/mfd/max77686.h>
	#include <linux/mfd/max77686-private.h>
	#include <dt-bindings/regulator/maxim,max77802.h>

	/* Default ramp delay in case it is not manually set */
	#define MAX77802_RAMP_DELAY 100000 /* uV/us */

	#define MAX77802_OPMODE_SHIFT_LDO 6
	#define MAX77802_OPMODE_BUCK234_SHIFT 4
	#define MAX77802_OPMODE_MASK 0x3

	#define MAX77802_VSEL_MASK 0x3F
	#define MAX77802_DVS_VSEL_MASK 0xFF

	#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
	#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
	#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
	#define MAX77802_RAMP_RATE_SHIFT_4BIT 4

	#define MAX77802_STATUS_OFF 0x0
	#define MAX77802_OFF_PWRREQ 0x1
	#define MAX77802_LP_PWRREQ 0x2

	static const unsigned int max77802_buck234_ramp_table[] = {
	12500,
	25000,
	50000,
	100000,
	};

	static const unsigned int max77802_buck16_ramp_table[] = {
	1000, 2000, 3030, 4000,
	5000, 5880, 7140, 8330,
	9090, 10000, 11110, 12500,
	16670, 25000, 50000, 100000,
	};

	struct max77802_regulator_prv {
	/* Array indexed by regulator id */
	unsigned int opmode[MAX77802_REG_MAX];
	};

	static inline unsigned int max77802_map_mode(unsigned int mode)
	{
	return mode == MAX77802_OPMODE_NORMAL ?
	REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
	}

	static int max77802_get_opmode_shift(int id)
	{
	if (id == MAX77802_BUCK1 \|\| (id >= MAX77802_BUCK5 &&
	id <= MAX77802_BUCK10))
	return 0;

	if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
	return MAX77802_OPMODE_BUCK234_SHIFT;

	if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
	return MAX77802_OPMODE_SHIFT_LDO;

	return -EINVAL;
	}

	/**
	* max77802_set_suspend_disable - Disable the regulator during system suspend
	* @rdev: regulator to mark as disabled
	*
	* All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
	* Configure the regulator so the PMIC will turn it OFF during system suspend.
	*/
	static int max77802_set_suspend_disable(struct regulator_dev *rdev)
	{
	unsigned int val = MAX77802_OFF_PWRREQ;
	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int shift = max77802_get_opmode_shift(id);

	max77802->opmode[id] = val;
	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	rdev->desc->enable_mask, val << shift);
	}

	/*
	* Some LDOs support Low Power Mode while the system is running.
	*
	* LDOs 1, 3, 20, 21.
	*/
	static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
	{
	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	unsigned int val;
	int shift = max77802_get_opmode_shift(id);

	switch (mode) {
	case REGULATOR_MODE_STANDBY:
	val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
	break;
	case REGULATOR_MODE_NORMAL:
	val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
	break;
	default:
	dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
	rdev->desc->name, mode);
	return -EINVAL;
	}

	max77802->opmode[id] = val;
	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	rdev->desc->enable_mask, val << shift);
	}

	static unsigned max77802_get_mode(struct regulator_dev *rdev)
	{
	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);

	return max77802_map_mode(max77802->opmode[id]);
	}

	/**
	* max77802_set_suspend_mode - set regulator opmode when the system is suspended
	* @rdev: regulator to change mode
	* @mode: operating mode to be set
	*
	* Will set the operating mode for the regulators during system suspend.
	* This function is valid for the three different enable control logics:
	*
	* Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
	* Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
	* Enable Control Logic3 by PWRREQ (LDO 3)
	*
	* If setting the regulator mode fails, the function only warns but does
	* not return an error code to avoid the regulator core to stop setting
	* the operating mode for the remaining regulators.
	*/
	static int max77802_set_suspend_mode(struct regulator_dev *rdev,
	unsigned int mode)
	{
	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	unsigned int val;
	int shift = max77802_get_opmode_shift(id);

	/*
	* If the regulator has been disabled for suspend
	* then is invalid to try setting a suspend mode.
	*/
	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
	dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
	rdev->desc->name, mode);
	return 0;
	}

	switch (mode) {
	case REGULATOR_MODE_STANDBY:
	/*
	* If the regulator opmode is normal then enable
	* ON in Low Power Mode by PWRREQ. If the mode is
	* already Low Power then no action is required.
	*/
	if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
	val = MAX77802_LP_PWRREQ;
	else
	return 0;
	break;
	case REGULATOR_MODE_NORMAL:
	/*
	* If the regulator operating mode is Low Power then
	* normal is not a valid opmode in suspend. If the
	* mode is already normal then no action is required.
	*/
	if (max77802->opmode[id] == MAX77802_OPMODE_LP)
	dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
	rdev->desc->name, mode);
	return 0;
	default:
	dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
	rdev->desc->name, mode);
	return -EINVAL;
	}

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	rdev->desc->enable_mask, val << shift);
	}

	static int max77802_enable(struct regulator_dev *rdev)
	{
	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int shift = max77802_get_opmode_shift(id);

	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
	max77802->opmode[id] = MAX77802_OPMODE_NORMAL;

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	rdev->desc->enable_mask,
	max77802->opmode[id] << shift);
	}

	/*
	* LDOs 2, 4-19, 22-35
	*/
	static const struct regulator_ops max77802_ldo_ops_logic1 = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = max77802_enable,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_suspend_disable = max77802_set_suspend_disable,
	.set_suspend_mode = max77802_set_suspend_mode,
	};

	/*
	* LDOs 1, 20, 21, 3
	*/
	static const struct regulator_ops max77802_ldo_ops_logic2 = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = max77802_enable,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_mode = max77802_set_mode,
	.get_mode = max77802_get_mode,
	.set_suspend_mode = max77802_set_suspend_mode,
	};

	/* BUCKS 1, 6 */
	static const struct regulator_ops max77802_buck_16_dvs_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = max77802_enable,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = regulator_set_ramp_delay_regmap,
	.set_suspend_disable = max77802_set_suspend_disable,
	};

	/* BUCKs 2-4 */
	static const struct regulator_ops max77802_buck_234_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = max77802_enable,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = regulator_set_ramp_delay_regmap,
	.set_suspend_disable = max77802_set_suspend_disable,
	.set_suspend_mode = max77802_set_suspend_mode,
	};

	/* BUCKs 5, 7-10 */
	static const struct regulator_ops max77802_buck_dvs_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = max77802_enable,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_suspend_disable = max77802_set_suspend_disable,
	};

	/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
	#define regulator_77802_desc_p_ldo(num, supply, log) { \
	.name = "LDO"#num, \
	.of_match = of_match_ptr("LDO"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_LDO##num, \
	.supply_name = "inl"#supply, \
	.ops = &max77802_ldo_ops_logic##log, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 800000, \
	.uV_step = 50000, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 1 << 6, \
	.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
	.vsel_mask = MAX77802_VSEL_MASK, \
	.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
	.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
	.of_map_mode = max77802_map_mode, \
	}

	/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
	#define regulator_77802_desc_n_ldo(num, supply, log) { \
	.name = "LDO"#num, \
	.of_match = of_match_ptr("LDO"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_LDO##num, \
	.supply_name = "inl"#supply, \
	.ops = &max77802_ldo_ops_logic##log, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 800000, \
	.uV_step = 25000, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 1 << 6, \
	.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
	.vsel_mask = MAX77802_VSEL_MASK, \
	.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
	.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
	.of_map_mode = max77802_map_mode, \
	}

	/* BUCKs 1, 6 */
	#define regulator_77802_desc_16_buck(num) { \
	.name = "BUCK"#num, \
	.of_match = of_match_ptr("BUCK"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_BUCK##num, \
	.supply_name = "inb"#num, \
	.ops = &max77802_buck_16_dvs_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 612500, \
	.uV_step = 6250, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 1 << 8, \
	.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
	.vsel_mask = MAX77802_DVS_VSEL_MASK, \
	.enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
	.enable_mask = MAX77802_OPMODE_MASK, \
	.ramp_reg = MAX77802_REG_BUCK ## num ## CTRL, \
	.ramp_mask = MAX77802_RAMP_RATE_MASK_4BIT, \
	.ramp_delay_table = max77802_buck16_ramp_table, \
	.n_ramp_values = ARRAY_SIZE(max77802_buck16_ramp_table), \
	.of_map_mode = max77802_map_mode, \
	}

	/* BUCKS 2-4 */
	#define regulator_77802_desc_234_buck(num) { \
	.name = "BUCK"#num, \
	.of_match = of_match_ptr("BUCK"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_BUCK##num, \
	.supply_name = "inb"#num, \
	.ops = &max77802_buck_234_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 600000, \
	.uV_step = 6250, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 0x91, \
	.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
	.vsel_mask = MAX77802_DVS_VSEL_MASK, \
	.enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
	.enable_mask = MAX77802_OPMODE_MASK << \
	MAX77802_OPMODE_BUCK234_SHIFT, \
	.ramp_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
	.ramp_mask = MAX77802_RAMP_RATE_MASK_2BIT, \
	.ramp_delay_table = max77802_buck234_ramp_table, \
	.n_ramp_values = ARRAY_SIZE(max77802_buck234_ramp_table), \
	.of_map_mode = max77802_map_mode, \
	}

	/* BUCK 5 */
	#define regulator_77802_desc_buck5(num) { \
	.name = "BUCK"#num, \
	.of_match = of_match_ptr("BUCK"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_BUCK##num, \
	.supply_name = "inb"#num, \
	.ops = &max77802_buck_dvs_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 750000, \
	.uV_step = 50000, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 1 << 6, \
	.vsel_reg = MAX77802_REG_BUCK5OUT, \
	.vsel_mask = MAX77802_VSEL_MASK, \
	.enable_reg = MAX77802_REG_BUCK5CTRL, \
	.enable_mask = MAX77802_OPMODE_MASK, \
	.of_map_mode = max77802_map_mode, \
	}

	/* BUCKs 7-10 */
	#define regulator_77802_desc_buck7_10(num) { \
	.name = "BUCK"#num, \
	.of_match = of_match_ptr("BUCK"#num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id = MAX77802_BUCK##num, \
	.supply_name = "inb"#num, \
	.ops = &max77802_buck_dvs_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.min_uV = 750000, \
	.uV_step = 50000, \
	.ramp_delay = MAX77802_RAMP_DELAY, \
	.n_voltages = 1 << 6, \
	.vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
	.vsel_mask = MAX77802_VSEL_MASK, \
	.enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
	.enable_mask = MAX77802_OPMODE_MASK, \
	.of_map_mode = max77802_map_mode, \
	}

	static const struct regulator_desc regulators[] = {
	regulator_77802_desc_16_buck(1),
	regulator_77802_desc_234_buck(2),
	regulator_77802_desc_234_buck(3),
	regulator_77802_desc_234_buck(4),
	regulator_77802_desc_buck5(5),
	regulator_77802_desc_16_buck(6),
	regulator_77802_desc_buck7_10(7),
	regulator_77802_desc_buck7_10(8),
	regulator_77802_desc_buck7_10(9),
	regulator_77802_desc_buck7_10(10),
	regulator_77802_desc_n_ldo(1, 10, 2),
	regulator_77802_desc_n_ldo(2, 10, 1),
	regulator_77802_desc_p_ldo(3, 3, 2),
	regulator_77802_desc_p_ldo(4, 6, 1),
	regulator_77802_desc_p_ldo(5, 3, 1),
	regulator_77802_desc_p_ldo(6, 3, 1),
	regulator_77802_desc_p_ldo(7, 3, 1),
	regulator_77802_desc_n_ldo(8, 1, 1),
	regulator_77802_desc_p_ldo(9, 5, 1),
	regulator_77802_desc_p_ldo(10, 4, 1),
	regulator_77802_desc_p_ldo(11, 4, 1),
	regulator_77802_desc_p_ldo(12, 9, 1),
	regulator_77802_desc_p_ldo(13, 4, 1),
	regulator_77802_desc_p_ldo(14, 4, 1),
	regulator_77802_desc_n_ldo(15, 1, 1),
	regulator_77802_desc_n_ldo(17, 2, 1),
	regulator_77802_desc_p_ldo(18, 7, 1),
	regulator_77802_desc_p_ldo(19, 5, 1),
	regulator_77802_desc_p_ldo(20, 7, 2),
	regulator_77802_desc_p_ldo(21, 6, 2),
	regulator_77802_desc_p_ldo(23, 9, 1),
	regulator_77802_desc_p_ldo(24, 6, 1),
	regulator_77802_desc_p_ldo(25, 9, 1),
	regulator_77802_desc_p_ldo(26, 9, 1),
	regulator_77802_desc_n_ldo(27, 2, 1),
	regulator_77802_desc_p_ldo(28, 7, 1),
	regulator_77802_desc_p_ldo(29, 7, 1),
	regulator_77802_desc_n_ldo(30, 2, 1),
	regulator_77802_desc_p_ldo(32, 9, 1),
	regulator_77802_desc_p_ldo(33, 6, 1),
	regulator_77802_desc_p_ldo(34, 9, 1),
	regulator_77802_desc_n_ldo(35, 2, 1),
	};

	static int max77802_pmic_probe(struct platform_device *pdev)
	{
	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct max77802_regulator_prv *max77802;
	int i, val;
	struct regulator_config config = { };

	max77802 = devm_kzalloc(&pdev->dev,
	sizeof(struct max77802_regulator_prv),
	GFP_KERNEL);
	if (!max77802)
	return -ENOMEM;

	config.dev = iodev->dev;
	config.regmap = iodev->regmap;
	config.driver_data = max77802;
	platform_set_drvdata(pdev, max77802);

	for (i = 0; i < MAX77802_REG_MAX; i++) {
	struct regulator_dev *rdev;
	int id = regulators[i].id;
	int shift = max77802_get_opmode_shift(id);
	int ret;

	ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
	if (ret < 0) {
	dev_warn(&pdev->dev,
	"cannot read current mode for %d\n", i);
	val = MAX77802_OPMODE_NORMAL;
	} else {
	val = val >> shift & MAX77802_OPMODE_MASK;
	}

	/*
	* If the regulator is disabled and the system warm rebooted,
	* the hardware reports OFF as the regulator operating mode.
	* Default to operating mode NORMAL in that case.
	*/
	if (val == MAX77802_STATUS_OFF)
	max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
	else
	max77802->opmode[id] = val;

	rdev = devm_regulator_register(&pdev->dev,
	&regulators[i], &config);
	if (IS_ERR(rdev)) {
	ret = PTR_ERR(rdev);
	dev_err(&pdev->dev,
	"regulator init failed for %d: %d\n", i, ret);
	return ret;
	}
	}

	return 0;
	}

	static const struct platform_device_id max77802_pmic_id[] = {
	{"max77802-pmic", 0},
	{ },
	};
	MODULE_DEVICE_TABLE(platform, max77802_pmic_id);

	static struct platform_driver max77802_pmic_driver = {
	.driver = {
	.name = "max77802-pmic",
	},
	.probe = max77802_pmic_probe,
	.id_table = max77802_pmic_id,
	};

	module_platform_driver(max77802_pmic_driver);

	MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
	MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
	MODULE_LICENSE("GPL");