[linux-block.git] / drivers / regulator / bd9571mwv-regulator.c

// SPDX-License-Identifier: GPL-2.0
/*
 * ROHM BD9571MWV-M and BD9574MWF-M regulator driver
 *
 * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
 *
 * Based on the TPS65086 driver
 *
 * NOTE: VD09 is missing
 */

#include <linux/mfd/rohm-generic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>

#include <linux/mfd/bd9571mwv.h>

struct bd9571mwv_reg {
	struct regmap *regmap;

	/* DDR Backup Power */
	u8 bkup_mode_cnt_keepon;	/* from "rohm,ddr-backup-power" */
	u8 bkup_mode_cnt_saved;
	bool bkup_mode_enabled;

	/* Power switch type */
	bool rstbmode_level;
	bool rstbmode_pulse;
};

enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS };

#define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\
	{							\
		.name			= _name,		\
		.of_match		= of_match_ptr(_of),	\
		.regulators_node	= "regulators",		\
		.id			= _id,			\
		.ops			= &_ops,		\
		.n_voltages		= _nv,			\
		.type			= REGULATOR_VOLTAGE,	\
		.owner			= THIS_MODULE,		\
		.vsel_reg		= _vr,			\
		.vsel_mask		= _vm,			\
		.min_uV			= _min,			\
		.uV_step		= _step,		\
		.linear_min_sel		= _lmin,		\
	}

static int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev)
{
	unsigned int val;
	int ret;

	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val);
	if (ret != 0)
		return ret;

	return val & BD9571MWV_AVS_SET_MONI_MASK;
}

static int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev,
						unsigned int sel)
{
	int ret;

	ret = bd9571mwv_avs_get_moni_state(rdev);
	if (ret < 0)
		return ret;

	return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret),
				 rdev->desc->vsel_mask, sel);
}

static int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
	unsigned int val;
	int ret;

	ret = bd9571mwv_avs_get_moni_state(rdev);
	if (ret < 0)
		return ret;

	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val);
	if (ret != 0)
		return ret;

	val &= rdev->desc->vsel_mask;
	val >>= ffs(rdev->desc->vsel_mask) - 1;

	return val;
}

static int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev,
						unsigned int sel)
{
	return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID,
				 rdev->desc->vsel_mask, sel);
}

/* Operations permitted on AVS voltage regulator */
static const struct regulator_ops avs_ops = {
	.set_voltage_sel	= bd9571mwv_avs_set_voltage_sel_regmap,
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= bd9571mwv_avs_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

/* Operations permitted on voltage regulators */
static const struct regulator_ops reg_ops = {
	.set_voltage_sel	= bd9571mwv_reg_set_voltage_sel_regmap,
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

/* Operations permitted on voltage monitors */
static const struct regulator_ops vid_ops = {
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

static const struct regulator_desc regulators[] = {
	BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f,
		      0x6f, 600000, 10000, 0x3c),
	BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf,
		      16, 1625000, 25000, 0),
	BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf,
		      16, 2150000, 50000, 0),
	BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf,
		      11, 2800000, 100000, 0),
	BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops,
		      BD9571MWV_DVFS_MONIVDAC, 0x7f,
		      0x6f, 600000, 10000, 0x3c),
};

#ifdef CONFIG_PM_SLEEP
static int bd9571mwv_bkup_mode_read(struct bd9571mwv_reg *bdreg,
				    unsigned int *mode)
{
	int ret;

	ret = regmap_read(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode);
	if (ret) {
		dev_err(regmap_get_device(bdreg->regmap),
			"failed to read backup mode (%d)\n", ret);
		return ret;
	}

	return 0;
}

static int bd9571mwv_bkup_mode_write(struct bd9571mwv_reg *bdreg,
				     unsigned int mode)
{
	int ret;

	ret = regmap_write(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode);
	if (ret) {
		dev_err(regmap_get_device(bdreg->regmap),
			"failed to configure backup mode 0x%x (%d)\n",
			mode, ret);
		return ret;
	}

	return 0;
}

static ssize_t backup_mode_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);

	return sysfs_emit(buf, "%s\n", bdreg->bkup_mode_enabled ? "on" : "off");
}

static ssize_t backup_mode_store(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
	unsigned int mode;
	int ret;

	if (!count)
		return 0;

	ret = kstrtobool(buf, &bdreg->bkup_mode_enabled);
	if (ret)
		return ret;

	if (!bdreg->rstbmode_level)
		return count;

	/*
	 * Configure DDR Backup Mode, to change the role of the accessory power
	 * switch from a power switch to a wake-up switch, or vice versa
	 */
	ret = bd9571mwv_bkup_mode_read(bdreg, &mode);
	if (ret)
		return ret;

	mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK;
	if (bdreg->bkup_mode_enabled)
		mode |= bdreg->bkup_mode_cnt_keepon;

	ret = bd9571mwv_bkup_mode_write(bdreg, mode);
	if (ret)
		return ret;

	return count;
}

static DEVICE_ATTR_RW(backup_mode);

static int bd9571mwv_suspend(struct device *dev)
{
	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
	unsigned int mode;
	int ret;

	if (!bdreg->bkup_mode_enabled)
		return 0;

	/* Save DDR Backup Mode */
	ret = bd9571mwv_bkup_mode_read(bdreg, &mode);
	if (ret)
		return ret;

	bdreg->bkup_mode_cnt_saved = mode;

	if (!bdreg->rstbmode_pulse)
		return 0;

	/* Enable DDR Backup Mode */
	mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK;
	mode |= bdreg->bkup_mode_cnt_keepon;

	if (mode != bdreg->bkup_mode_cnt_saved)
		return bd9571mwv_bkup_mode_write(bdreg, mode);

	return 0;
}

static int bd9571mwv_resume(struct device *dev)
{
	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);

	if (!bdreg->bkup_mode_enabled)
		return 0;

	/* Restore DDR Backup Mode */
	return bd9571mwv_bkup_mode_write(bdreg, bdreg->bkup_mode_cnt_saved);
}

static const struct dev_pm_ops bd9571mwv_pm  = {
	SET_SYSTEM_SLEEP_PM_OPS(bd9571mwv_suspend, bd9571mwv_resume)
};

static int bd9571mwv_regulator_remove(struct platform_device *pdev)
{
	device_remove_file(&pdev->dev, &dev_attr_backup_mode);
	return 0;
}
#define DEV_PM_OPS	&bd9571mwv_pm
#else
#define DEV_PM_OPS	NULL
#define bd9571mwv_regulator_remove	NULL
#endif /* CONFIG_PM_SLEEP */

static int bd9571mwv_regulator_probe(struct platform_device *pdev)
{
	struct regulator_config config = { };
	struct bd9571mwv_reg *bdreg;
	struct regulator_dev *rdev;
	unsigned int val;
	int i;
	enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;

	bdreg = devm_kzalloc(&pdev->dev, sizeof(*bdreg), GFP_KERNEL);
	if (!bdreg)
		return -ENOMEM;

	bdreg->regmap = dev_get_regmap(pdev->dev.parent, NULL);

	platform_set_drvdata(pdev, bdreg);

	config.dev = &pdev->dev;
	config.dev->of_node = pdev->dev.parent->of_node;
	config.driver_data = bdreg;
	config.regmap = bdreg->regmap;

	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
		/* BD9574MWF supports DVFS only */
		if (chip == ROHM_CHIP_TYPE_BD9574 && regulators[i].id != DVFS)
			continue;
		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
					       &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev, "failed to register %s regulator\n",
				regulators[i].name);
			return PTR_ERR(rdev);
		}
	}

	val = 0;
	of_property_read_u32(config.dev->of_node, "rohm,ddr-backup-power", &val);
	if (val & ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK) {
		dev_err(&pdev->dev, "invalid %s mode %u\n",
			"rohm,ddr-backup-power", val);
		return -EINVAL;
	}
	bdreg->bkup_mode_cnt_keepon = val;

	bdreg->rstbmode_level = of_property_read_bool(config.dev->of_node,
						      "rohm,rstbmode-level");
	bdreg->rstbmode_pulse = of_property_read_bool(config.dev->of_node,
						      "rohm,rstbmode-pulse");
	if (bdreg->rstbmode_level && bdreg->rstbmode_pulse) {
		dev_err(&pdev->dev, "only one rohm,rstbmode-* may be specified");
		return -EINVAL;
	}

#ifdef CONFIG_PM_SLEEP
	if (bdreg->bkup_mode_cnt_keepon) {
		int ret;

		/*
		 * Backup mode is enabled by default in pulse mode, but needs
		 * explicit user setup in level mode.
		 */
		bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse;

		ret = device_create_file(&pdev->dev, &dev_attr_backup_mode);
		if (ret)
			return ret;
	}
#endif /* CONFIG_PM_SLEEP */

	return 0;
}

static const struct platform_device_id bd9571mwv_regulator_id_table[] = {
	{ "bd9571mwv-regulator", ROHM_CHIP_TYPE_BD9571 },
	{ "bd9574mwf-regulator", ROHM_CHIP_TYPE_BD9574 },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table);

static struct platform_driver bd9571mwv_regulator_driver = {
	.driver = {
		.name = "bd9571mwv-regulator",
		.pm = DEV_PM_OPS,
	},
	.probe = bd9571mwv_regulator_probe,
	.remove = bd9571mwv_regulator_remove,
	.id_table = bd9571mwv_regulator_id_table,
};
module_platform_driver(bd9571mwv_regulator_driver);

MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
MODULE_DESCRIPTION("BD9571MWV Regulator driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
49f53951	1	// SPDX-License-Identifier: GPL-2.0
e85c5a15	2	/*
ceee9dc1	3	* ROHM BD9571MWV-M and BD9574MWF-M regulator driver
e85c5a15 MV	4	*
	5	* Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
	6	*
e85c5a15 MV	7	* Based on the TPS65086 driver
	8	*
	9	* NOTE: VD09 is missing
	10	*/
	11
ceee9dc1	12	#include <linux/mfd/rohm-generic.h>
e85c5a15 MV	13	#include <linux/module.h>
	14	#include <linux/of.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regulator/driver.h>
	17
	18	#include <linux/mfd/bd9571mwv.h>
	19
6eb0bfae	20	struct bd9571mwv_reg {
30402f97	21	struct regmap *regmap;
6eb0bfae GU	22
	23	/* DDR Backup Power */
	24	u8 bkup_mode_cnt_keepon; /* from "rohm,ddr-backup-power" */
	25	u8 bkup_mode_cnt_saved;
02b3a073	26	bool bkup_mode_enabled;
6eb0bfae GU	27
	28	/* Power switch type */
	29	bool rstbmode_level;
	30	bool rstbmode_pulse;
	31	};
	32
e85c5a15 MV	33	enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS };
	34
	35	#define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\
	36	{ \
	37	.name = _name, \
	38	.of_match = of_match_ptr(_of), \
	39	.regulators_node = "regulators", \
	40	.id = _id, \
	41	.ops = &_ops, \
	42	.n_voltages = _nv, \
	43	.type = REGULATOR_VOLTAGE, \
	44	.owner = THIS_MODULE, \
	45	.vsel_reg = _vr, \
	46	.vsel_mask = _vm, \
	47	.min_uV = _min, \
	48	.uV_step = _step, \
	49	.linear_min_sel = _lmin, \
	50	}
	51
cb42b648	52	static int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev)
e85c5a15 MV	53	{
	54	unsigned int val;
	55	int ret;
	56
	57	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val);
	58	if (ret != 0)
	59	return ret;
	60
	61	return val & BD9571MWV_AVS_SET_MONI_MASK;
	62	}
	63
cb42b648 AL	64	static int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev,
cb42b648 AL	65	unsigned int sel)
e85c5a15 MV	66	{
	67	int ret;
	68
	69	ret = bd9571mwv_avs_get_moni_state(rdev);
	70	if (ret < 0)
	71	return ret;
	72
	73	return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret),
	74	rdev->desc->vsel_mask, sel);
	75	}
	76
cb42b648	77	static int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev)
e85c5a15 MV	78	{
	79	unsigned int val;
	80	int ret;
	81
	82	ret = bd9571mwv_avs_get_moni_state(rdev);
	83	if (ret < 0)
	84	return ret;
	85
	86	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val);
	87	if (ret != 0)
	88	return ret;
	89
	90	val &= rdev->desc->vsel_mask;
	91	val >>= ffs(rdev->desc->vsel_mask) - 1;
	92
	93	return val;
	94	}
	95
cb42b648 AL	96	static int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev,
cb42b648 AL	97	unsigned int sel)
e85c5a15 MV	98	{
	99	return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID,
	100	rdev->desc->vsel_mask, sel);
	101	}
	102
	103	/* Operations permitted on AVS voltage regulator */
e109e711	104	static const struct regulator_ops avs_ops = {
e85c5a15 MV	105	.set_voltage_sel = bd9571mwv_avs_set_voltage_sel_regmap,
	106	.map_voltage = regulator_map_voltage_linear,
	107	.get_voltage_sel = bd9571mwv_avs_get_voltage_sel_regmap,
	108	.list_voltage = regulator_list_voltage_linear,
	109	};
	110
	111	/* Operations permitted on voltage regulators */
e109e711	112	static const struct regulator_ops reg_ops = {
e85c5a15 MV	113	.set_voltage_sel = bd9571mwv_reg_set_voltage_sel_regmap,
	114	.map_voltage = regulator_map_voltage_linear,
	115	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	116	.list_voltage = regulator_list_voltage_linear,
	117	};
	118
	119	/* Operations permitted on voltage monitors */
e109e711	120	static const struct regulator_ops vid_ops = {
e85c5a15 MV	121	.map_voltage = regulator_map_voltage_linear,
	122	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	123	.list_voltage = regulator_list_voltage_linear,
	124	};
	125
e109e711	126	static const struct regulator_desc regulators[] = {
e85c5a15	127	BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f,
3b6e7088	128	0x6f, 600000, 10000, 0x3c),
e85c5a15 MV	129	BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf,
	130	16, 1625000, 25000, 0),
	131	BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf,
	132	16, 2150000, 50000, 0),
	133	BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf,
	134	11, 2800000, 100000, 0),
	135	BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops,
	136	BD9571MWV_DVFS_MONIVDAC, 0x7f,
3b6e7088	137	0x6f, 600000, 10000, 0x3c),
e85c5a15 MV	138	};
e85c5a15 MV	139
6eb0bfae	140	#ifdef CONFIG_PM_SLEEP
30402f97 YS	141	static int bd9571mwv_bkup_mode_read(struct bd9571mwv_reg *bdreg,
30402f97 YS	142	unsigned int *mode)
6eb0bfae GU	143	{
	144	int ret;
	145
30402f97	146	ret = regmap_read(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode);
6eb0bfae	147	if (ret) {
30402f97 YS	148	dev_err(regmap_get_device(bdreg->regmap),
30402f97 YS	149	"failed to read backup mode (%d)\n", ret);
6eb0bfae GU	150	return ret;
	151	}
	152
	153	return 0;
	154	}
	155
30402f97 YS	156	static int bd9571mwv_bkup_mode_write(struct bd9571mwv_reg *bdreg,
30402f97 YS	157	unsigned int mode)
6eb0bfae GU	158	{
	159	int ret;
	160
30402f97	161	ret = regmap_write(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode);
6eb0bfae	162	if (ret) {
30402f97 YS	163	dev_err(regmap_get_device(bdreg->regmap),
30402f97 YS	164	"failed to configure backup mode 0x%x (%d)\n",
6eb0bfae GU	165	mode, ret);
	166	return ret;
	167	}
	168
	169	return 0;
	170	}
	171
02b3a073 GU	172	static ssize_t backup_mode_show(struct device *dev,
	173	struct device_attribute attr, char buf)
	174	{
	175	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
	176
1deceabb	177	return sysfs_emit(buf, "%s\n", bdreg->bkup_mode_enabled ? "on" : "off");
02b3a073 GU	178	}
	179
	180	static ssize_t backup_mode_store(struct device *dev,
	181	struct device_attribute *attr,
	182	const char *buf, size_t count)
	183	{
	184	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
e436875f	185	unsigned int mode;
02b3a073 GU	186	int ret;
	187
	188	if (!count)
	189	return 0;
	190
	191	ret = kstrtobool(buf, &bdreg->bkup_mode_enabled);
	192	if (ret)
	193	return ret;
	194
e436875f GU	195	if (!bdreg->rstbmode_level)
	196	return count;
	197
	198	/*
	199	* Configure DDR Backup Mode, to change the role of the accessory power
	200	* switch from a power switch to a wake-up switch, or vice versa
	201	*/
30402f97	202	ret = bd9571mwv_bkup_mode_read(bdreg, &mode);
e436875f GU	203	if (ret)
	204	return ret;
	205
	206	mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK;
	207	if (bdreg->bkup_mode_enabled)
	208	mode \|= bdreg->bkup_mode_cnt_keepon;
	209
30402f97	210	ret = bd9571mwv_bkup_mode_write(bdreg, mode);
e436875f GU	211	if (ret)
	212	return ret;
	213
02b3a073 GU	214	return count;
	215	}
	216
a70a4694	217	static DEVICE_ATTR_RW(backup_mode);
02b3a073	218
6eb0bfae GU	219	static int bd9571mwv_suspend(struct device *dev)
	220	{
	221	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
	222	unsigned int mode;
	223	int ret;
	224
02b3a073	225	if (!bdreg->bkup_mode_enabled)
6eb0bfae GU	226	return 0;
	227
	228	/* Save DDR Backup Mode */
30402f97	229	ret = bd9571mwv_bkup_mode_read(bdreg, &mode);
6eb0bfae GU	230	if (ret)
	231	return ret;
	232
	233	bdreg->bkup_mode_cnt_saved = mode;
	234
	235	if (!bdreg->rstbmode_pulse)
	236	return 0;
	237
	238	/* Enable DDR Backup Mode */
	239	mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK;
	240	mode \|= bdreg->bkup_mode_cnt_keepon;
	241
	242	if (mode != bdreg->bkup_mode_cnt_saved)
30402f97	243	return bd9571mwv_bkup_mode_write(bdreg, mode);
6eb0bfae GU	244
	245	return 0;
	246	}
	247
	248	static int bd9571mwv_resume(struct device *dev)
	249	{
	250	struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
	251
02b3a073	252	if (!bdreg->bkup_mode_enabled)
6eb0bfae GU	253	return 0;
	254
	255	/* Restore DDR Backup Mode */
30402f97	256	return bd9571mwv_bkup_mode_write(bdreg, bdreg->bkup_mode_cnt_saved);
6eb0bfae GU	257	}
	258
	259	static const struct dev_pm_ops bd9571mwv_pm = {
	260	SET_SYSTEM_SLEEP_PM_OPS(bd9571mwv_suspend, bd9571mwv_resume)
	261	};
	262
02b3a073 GU	263	static int bd9571mwv_regulator_remove(struct platform_device *pdev)
	264	{
	265	device_remove_file(&pdev->dev, &dev_attr_backup_mode);
	266	return 0;
	267	}
6eb0bfae GU	268	#define DEV_PM_OPS &bd9571mwv_pm
	269	#else
	270	#define DEV_PM_OPS NULL
02b3a073	271	#define bd9571mwv_regulator_remove NULL
6eb0bfae GU	272	#endif /* CONFIG_PM_SLEEP */
6eb0bfae GU	273
e85c5a15 MV	274	static int bd9571mwv_regulator_probe(struct platform_device *pdev)
e85c5a15 MV	275	{
e85c5a15	276	struct regulator_config config = { };
6eb0bfae	277	struct bd9571mwv_reg *bdreg;
e85c5a15	278	struct regulator_dev *rdev;
6eb0bfae	279	unsigned int val;
e85c5a15	280	int i;
ceee9dc1	281	enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
e85c5a15	282
6eb0bfae GU	283	bdreg = devm_kzalloc(&pdev->dev, sizeof(*bdreg), GFP_KERNEL);
	284	if (!bdreg)
	285	return -ENOMEM;
	286
30402f97	287	bdreg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
6eb0bfae GU	288
6eb0bfae GU	289	platform_set_drvdata(pdev, bdreg);
e85c5a15 MV	290
e85c5a15 MV	291	config.dev = &pdev->dev;
30402f97 YS	292	config.dev->of_node = pdev->dev.parent->of_node;
	293	config.driver_data = bdreg;
	294	config.regmap = bdreg->regmap;
e85c5a15 MV	295
e85c5a15 MV	296	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
ceee9dc1 YS	297	/* BD9574MWF supports DVFS only */
	298	if (chip == ROHM_CHIP_TYPE_BD9574 && regulators[i].id != DVFS)
	299	continue;
e85c5a15 MV	300	rdev = devm_regulator_register(&pdev->dev, &regulators[i],
	301	&config);
	302	if (IS_ERR(rdev)) {
30402f97	303	dev_err(&pdev->dev, "failed to register %s regulator\n",
9cbc23f7	304	regulators[i].name);
e85c5a15 MV	305	return PTR_ERR(rdev);
	306	}
	307	}
	308
6eb0bfae	309	val = 0;
30402f97	310	of_property_read_u32(config.dev->of_node, "rohm,ddr-backup-power", &val);
6eb0bfae	311	if (val & ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK) {
30402f97	312	dev_err(&pdev->dev, "invalid %s mode %u\n",
6eb0bfae GU	313	"rohm,ddr-backup-power", val);
	314	return -EINVAL;
	315	}
	316	bdreg->bkup_mode_cnt_keepon = val;
	317
30402f97	318	bdreg->rstbmode_level = of_property_read_bool(config.dev->of_node,
6eb0bfae	319	"rohm,rstbmode-level");
30402f97	320	bdreg->rstbmode_pulse = of_property_read_bool(config.dev->of_node,
6eb0bfae GU	321	"rohm,rstbmode-pulse");
6eb0bfae GU	322	if (bdreg->rstbmode_level && bdreg->rstbmode_pulse) {
30402f97	323	dev_err(&pdev->dev, "only one rohm,rstbmode-* may be specified");
6eb0bfae GU	324	return -EINVAL;
	325	}
	326
02b3a073	327	#ifdef CONFIG_PM_SLEEP
6eb0bfae	328	if (bdreg->bkup_mode_cnt_keepon) {
02b3a073 GU	329	int ret;
02b3a073 GU	330
6eb0bfae	331	/*
02b3a073	332	* Backup mode is enabled by default in pulse mode, but needs
6eb0bfae GU	333	* explicit user setup in level mode.
6eb0bfae GU	334	*/
02b3a073 GU	335	bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse;
	336
	337	ret = device_create_file(&pdev->dev, &dev_attr_backup_mode);
	338	if (ret)
	339	return ret;
6eb0bfae	340	}
02b3a073	341	#endif /* CONFIG_PM_SLEEP */
6eb0bfae	342
e85c5a15 MV	343	return 0;
	344	}
	345
	346	static const struct platform_device_id bd9571mwv_regulator_id_table[] = {
ceee9dc1 YS	347	{ "bd9571mwv-regulator", ROHM_CHIP_TYPE_BD9571 },
ceee9dc1 YS	348	{ "bd9574mwf-regulator", ROHM_CHIP_TYPE_BD9574 },
e85c5a15 MV	349	{ /* sentinel */ }
	350	};
	351	MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table);
	352
	353	static struct platform_driver bd9571mwv_regulator_driver = {
	354	.driver = {
	355	.name = "bd9571mwv-regulator",
6eb0bfae	356	.pm = DEV_PM_OPS,
e85c5a15 MV	357	},
e85c5a15 MV	358	.probe = bd9571mwv_regulator_probe,
02b3a073	359	.remove = bd9571mwv_regulator_remove,
e85c5a15 MV	360	.id_table = bd9571mwv_regulator_id_table,
	361	};
	362	module_platform_driver(bd9571mwv_regulator_driver);
	363
	364	MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
	365	MODULE_DESCRIPTION("BD9571MWV Regulator driver");
	366	MODULE_LICENSE("GPL v2");