[u-boot.git] / drivers / power / regulator / regulator-uclass.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2014-2015 Samsung Electronics
 * Przemyslaw Marczak <[email protected]>
 */

#include <common.h>
#include <errno.h>
#include <dm.h>
#include <log.h>
#include <dm/uclass-internal.h>
#include <linux/delay.h>
#include <power/pmic.h>
#include <power/regulator.h>

int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
{
	struct dm_regulator_uclass_platdata *uc_pdata;

	*modep = NULL;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (!uc_pdata)
		return -ENXIO;

	*modep = uc_pdata->mode;
	return uc_pdata->mode_count;
}

int regulator_get_value(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->get_value)
		return -ENOSYS;

	return ops->get_value(dev);
}

static void regulator_set_value_ramp_delay(struct udevice *dev, int old_uV,
					   int new_uV, unsigned int ramp_delay)
{
	int delay = DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);

	debug("regulator %s: delay %u us (%d uV -> %d uV)\n", dev->name, delay,
	      old_uV, new_uV);

	udelay(delay);
}

int regulator_set_value(struct udevice *dev, int uV)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	struct dm_regulator_uclass_platdata *uc_pdata;
	int ret, old_uV = uV, is_enabled = 0;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
		return -EINVAL;
	if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
		return -EINVAL;

	if (!ops || !ops->set_value)
		return -ENOSYS;

	if (uc_pdata->ramp_delay) {
		is_enabled = regulator_get_enable(dev);
		old_uV = regulator_get_value(dev);
	}

	ret = ops->set_value(dev, uV);

	if (!ret) {
		if (uc_pdata->ramp_delay && old_uV > 0 && is_enabled)
			regulator_set_value_ramp_delay(dev, old_uV, uV,
						       uc_pdata->ramp_delay);
	}

	return ret;
}

int regulator_set_suspend_value(struct udevice *dev, int uV)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
		return -EINVAL;
	if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
		return -EINVAL;

	if (!ops->set_suspend_value)
		return -ENOSYS;

	return ops->set_suspend_value(dev, uV);
}

int regulator_get_suspend_value(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops->get_suspend_value)
		return -ENOSYS;

	return ops->get_suspend_value(dev);
}

/*
 * To be called with at most caution as there is no check
 * before setting the actual voltage value.
 */
int regulator_set_value_force(struct udevice *dev, int uV)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->set_value)
		return -ENOSYS;

	return ops->set_value(dev, uV);
}

int regulator_get_current(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->get_current)
		return -ENOSYS;

	return ops->get_current(dev);
}

int regulator_set_current(struct udevice *dev, int uA)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
		return -EINVAL;
	if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
		return -EINVAL;

	if (!ops || !ops->set_current)
		return -ENOSYS;

	return ops->set_current(dev, uA);
}

int regulator_get_enable(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->get_enable)
		return -ENOSYS;

	return ops->get_enable(dev);
}

int regulator_set_enable(struct udevice *dev, bool enable)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	struct dm_regulator_uclass_platdata *uc_pdata;
	int ret, old_enable = 0;

	if (!ops || !ops->set_enable)
		return -ENOSYS;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (!enable && uc_pdata->always_on)
		return -EACCES;

	if (uc_pdata->ramp_delay)
		old_enable = regulator_get_enable(dev);

	ret = ops->set_enable(dev, enable);
	if (!ret) {
		if (uc_pdata->ramp_delay && !old_enable && enable) {
			int uV = regulator_get_value(dev);

			if (uV > 0) {
				regulator_set_value_ramp_delay(dev, 0, uV,
							       uc_pdata->ramp_delay);
			}
		}
	}

	return ret;
}

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

	ret = regulator_set_enable(dev, enable);
	if (ret == -ENOSYS || ret == -EACCES)
		return 0;

	return ret;
}

int regulator_set_suspend_enable(struct udevice *dev, bool enable)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops->set_suspend_enable)
		return -ENOSYS;

	return ops->set_suspend_enable(dev, enable);
}

int regulator_get_suspend_enable(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops->get_suspend_enable)
		return -ENOSYS;

	return ops->get_suspend_enable(dev);
}

int regulator_get_mode(struct udevice *dev)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->get_mode)
		return -ENOSYS;

	return ops->get_mode(dev);
}

int regulator_set_mode(struct udevice *dev, int mode)
{
	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->set_mode)
		return -ENOSYS;

	return ops->set_mode(dev, mode);
}

int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	struct udevice *dev;
	int ret;

	*devp = NULL;

	for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
	     ret = uclass_find_next_device(&dev)) {
		if (ret) {
			debug("regulator %s, ret=%d\n", dev->name, ret);
			continue;
		}

		uc_pdata = dev_get_uclass_platdata(dev);
		if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
			continue;

		return uclass_get_device_tail(dev, 0, devp);
	}

	debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);

	return -ENODEV;
}

int regulator_get_by_devname(const char *devname, struct udevice **devp)
{
	return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
}

int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
				struct udevice **devp)
{
	return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
					    supply_name, devp);
}

int regulator_autoset(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	int ret = 0;

	uc_pdata = dev_get_uclass_platdata(dev);

	ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on);
	if (!ret && uc_pdata->suspend_on) {
		ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV);
		if (!ret)
			return ret;
	}

	if (!uc_pdata->always_on && !uc_pdata->boot_on)
		return -EMEDIUMTYPE;

	if (uc_pdata->type == REGULATOR_TYPE_FIXED)
		return regulator_set_enable(dev, true);

	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
		ret = regulator_set_value(dev, uc_pdata->min_uV);
	if (uc_pdata->init_uV > 0)
		ret = regulator_set_value(dev, uc_pdata->init_uV);
	if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
		ret = regulator_set_current(dev, uc_pdata->min_uA);

	if (!ret)
		ret = regulator_set_enable(dev, true);

	return ret;
}

static void regulator_show(struct udevice *dev, int ret)
{
	struct dm_regulator_uclass_platdata *uc_pdata;

	uc_pdata = dev_get_uclass_platdata(dev);

	printf("%s@%s: ", dev->name, uc_pdata->name);
	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
		printf("set %d uV", uc_pdata->min_uV);
	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
		printf("; set %d uA", uc_pdata->min_uA);
	printf("; enabling");
	if (ret)
		printf(" (ret: %d)", ret);
	printf("\n");
}

int regulator_autoset_by_name(const char *platname, struct udevice **devp)
{
	struct udevice *dev;
	int ret;

	ret = regulator_get_by_platname(platname, &dev);
	if (devp)
		*devp = dev;
	if (ret) {
		debug("Can get the regulator: %s (err=%d)\n", platname, ret);
		return ret;
	}

	return regulator_autoset(dev);
}

int regulator_list_autoset(const char *list_platname[],
			   struct udevice *list_devp[],
			   bool verbose)
{
	struct udevice *dev;
	int error = 0, i = 0, ret;

	while (list_platname[i]) {
		ret = regulator_autoset_by_name(list_platname[i], &dev);
		if (ret != -EMEDIUMTYPE && verbose)
			regulator_show(dev, ret);
		if (ret & !error)
			error = ret;

		if (list_devp)
			list_devp[i] = dev;

		i++;
	}

	return error;
}

static bool regulator_name_is_unique(struct udevice *check_dev,
				     const char *check_name)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	struct udevice *dev;
	int check_len = strlen(check_name);
	int ret;
	int len;

	for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
	     ret = uclass_find_next_device(&dev)) {
		if (ret || dev == check_dev)
			continue;

		uc_pdata = dev_get_uclass_platdata(dev);
		len = strlen(uc_pdata->name);
		if (len != check_len)
			continue;

		if (!strcmp(uc_pdata->name, check_name))
			return false;
	}

	return true;
}

static int regulator_post_bind(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	const char *property = "regulator-name";

	uc_pdata = dev_get_uclass_platdata(dev);

	/* Regulator's mandatory constraint */
	uc_pdata->name = dev_read_string(dev, property);
	if (!uc_pdata->name) {
		debug("%s: dev '%s' has no property '%s'\n",
		      __func__, dev->name, property);
		uc_pdata->name = dev_read_name(dev);
		if (!uc_pdata->name)
			return -EINVAL;
	}

	if (regulator_name_is_unique(dev, uc_pdata->name))
		return 0;

	debug("'%s' of dev: '%s', has nonunique value: '%s\n",
	      property, dev->name, uc_pdata->name);

	return -EINVAL;
}

static int regulator_pre_probe(struct udevice *dev)
{
	struct dm_regulator_uclass_platdata *uc_pdata;
	ofnode node;

	uc_pdata = dev_get_uclass_platdata(dev);
	if (!uc_pdata)
		return -ENXIO;

	/* Regulator's optional constraints */
	uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
						-ENODATA);
	uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
						-ENODATA);
	uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt",
						 -ENODATA);
	uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
						-ENODATA);
	uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
						-ENODATA);
	uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
	uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
	uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
						    0);

	node = dev_read_subnode(dev, "regulator-state-mem");
	if (ofnode_valid(node)) {
		uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend");
		if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV))
			uc_pdata->suspend_uV = uc_pdata->max_uV;
	} else {
		uc_pdata->suspend_on = true;
		uc_pdata->suspend_uV = uc_pdata->max_uV;
	}

	/* Those values are optional (-ENODATA if unset) */
	if ((uc_pdata->min_uV != -ENODATA) &&
	    (uc_pdata->max_uV != -ENODATA) &&
	    (uc_pdata->min_uV == uc_pdata->max_uV))
		uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;

	/* Those values are optional (-ENODATA if unset) */
	if ((uc_pdata->min_uA != -ENODATA) &&
	    (uc_pdata->max_uA != -ENODATA) &&
	    (uc_pdata->min_uA == uc_pdata->max_uA))
		uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;

	if (uc_pdata->boot_on)
		regulator_set_enable(dev, uc_pdata->boot_on);

	return 0;
}

int regulators_enable_boot_on(bool verbose)
{
	struct udevice *dev;
	struct uclass *uc;
	int ret;

	ret = uclass_get(UCLASS_REGULATOR, &uc);
	if (ret)
		return ret;
	for (uclass_first_device(UCLASS_REGULATOR, &dev);
	     dev;
	     uclass_next_device(&dev)) {
		ret = regulator_autoset(dev);
		if (ret == -EMEDIUMTYPE) {
			ret = 0;
			continue;
		}
		if (verbose)
			regulator_show(dev, ret);
		if (ret == -ENOSYS)
			ret = 0;
	}

	return ret;
}

UCLASS_DRIVER(regulator) = {
	.id		= UCLASS_REGULATOR,
	.name		= "regulator",
	.post_bind	= regulator_post_bind,
	.pre_probe	= regulator_pre_probe,
	.per_device_platdata_auto_alloc_size =
				sizeof(struct dm_regulator_uclass_platdata),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
af41e8db PM	2	/*
	3	* Copyright (C) 2014-2015 Samsung Electronics
	4	* Przemyslaw Marczak <[email protected]>
af41e8db	5	*/
f15cd4f1	6
af41e8db	7	#include <common.h>
af41e8db PM	8	#include <errno.h>
af41e8db PM	9	#include <dm.h>
f7ae49fc	10	#include <log.h>
af41e8db	11	#include <dm/uclass-internal.h>
c05ed00a	12	#include <linux/delay.h>
af41e8db PM	13	#include <power/pmic.h>
	14	#include <power/regulator.h>
	15
af41e8db PM	16	int regulator_mode(struct udevice dev, struct dm_regulator_mode *modep)
	17	{
	18	struct dm_regulator_uclass_platdata *uc_pdata;
	19
	20	*modep = NULL;
	21
	22	uc_pdata = dev_get_uclass_platdata(dev);
	23	if (!uc_pdata)
	24	return -ENXIO;
	25
	26	*modep = uc_pdata->mode;
	27	return uc_pdata->mode_count;
	28	}
	29
	30	int regulator_get_value(struct udevice *dev)
	31	{
	32	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	33
	34	if (!ops \|\| !ops->get_value)
	35	return -ENOSYS;
	36
	37	return ops->get_value(dev);
	38	}
	39
e66d1cb3 KK	40	static void regulator_set_value_ramp_delay(struct udevice *dev, int old_uV,
	41	int new_uV, unsigned int ramp_delay)
	42	{
	43	int delay = DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);
	44
	45	debug("regulator %s: delay %u us (%d uV -> %d uV)\n", dev->name, delay,
	46	old_uV, new_uV);
	47
	48	udelay(delay);
	49	}
	50
af41e8db PM	51	int regulator_set_value(struct udevice *dev, int uV)
	52	{
	53	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
eaadcf38	54	struct dm_regulator_uclass_platdata *uc_pdata;
e66d1cb3	55	int ret, old_uV = uV, is_enabled = 0;
eaadcf38 K	56
	57	uc_pdata = dev_get_uclass_platdata(dev);
	58	if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
	59	return -EINVAL;
	60	if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
	61	return -EINVAL;
af41e8db PM	62
	63	if (!ops \|\| !ops->set_value)
	64	return -ENOSYS;
	65
e66d1cb3 KK	66	if (uc_pdata->ramp_delay) {
	67	is_enabled = regulator_get_enable(dev);
	68	old_uV = regulator_get_value(dev);
	69	}
	70
	71	ret = ops->set_value(dev, uV);
	72
	73	if (!ret) {
	74	if (uc_pdata->ramp_delay && old_uV > 0 && is_enabled)
	75	regulator_set_value_ramp_delay(dev, old_uV, uV,
	76	uc_pdata->ramp_delay);
	77	}
	78
	79	return ret;
af41e8db	80	}
2f5d532f	81
11406b8f JC	82	int regulator_set_suspend_value(struct udevice *dev, int uV)
	83	{
	84	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	85	struct dm_regulator_uclass_platdata *uc_pdata;
	86
	87	uc_pdata = dev_get_uclass_platdata(dev);
	88	if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
	89	return -EINVAL;
	90	if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
	91	return -EINVAL;
	92
	93	if (!ops->set_suspend_value)
	94	return -ENOSYS;
	95
	96	return ops->set_suspend_value(dev, uV);
	97	}
	98
	99	int regulator_get_suspend_value(struct udevice *dev)
	100	{
	101	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	102
	103	if (!ops->get_suspend_value)
	104	return -ENOSYS;
	105
	106	return ops->get_suspend_value(dev);
	107	}
	108
2f5d532f K	109	/*
	110	* To be called with at most caution as there is no check
	111	* before setting the actual voltage value.
	112	*/
	113	int regulator_set_value_force(struct udevice *dev, int uV)
	114	{
	115	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	116
	117	if (!ops \|\| !ops->set_value)
	118	return -ENOSYS;
	119
	120	return ops->set_value(dev, uV);
	121	}
af41e8db PM	122
	123	int regulator_get_current(struct udevice *dev)
	124	{
	125	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	126
	127	if (!ops \|\| !ops->get_current)
	128	return -ENOSYS;
	129
	130	return ops->get_current(dev);
	131	}
	132
	133	int regulator_set_current(struct udevice *dev, int uA)
	134	{
	135	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
5483456e K	136	struct dm_regulator_uclass_platdata *uc_pdata;
	137
	138	uc_pdata = dev_get_uclass_platdata(dev);
	139	if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
	140	return -EINVAL;
	141	if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
	142	return -EINVAL;
af41e8db PM	143
	144	if (!ops \|\| !ops->set_current)
	145	return -ENOSYS;
	146
	147	return ops->set_current(dev, uA);
	148	}
	149
06bdf600	150	int regulator_get_enable(struct udevice *dev)
af41e8db PM	151	{
	152	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	153
	154	if (!ops \|\| !ops->get_enable)
	155	return -ENOSYS;
	156
	157	return ops->get_enable(dev);
	158	}
	159
	160	int regulator_set_enable(struct udevice *dev, bool enable)
	161	{
	162	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
4f86a724	163	struct dm_regulator_uclass_platdata *uc_pdata;
e66d1cb3	164	int ret, old_enable = 0;
af41e8db PM	165
	166	if (!ops \|\| !ops->set_enable)
	167	return -ENOSYS;
	168
4f86a724 PD	169	uc_pdata = dev_get_uclass_platdata(dev);
4f86a724 PD	170	if (!enable && uc_pdata->always_on)
f93fab31	171	return -EACCES;
4f86a724	172
e66d1cb3 KK	173	if (uc_pdata->ramp_delay)
	174	old_enable = regulator_get_enable(dev);
	175
	176	ret = ops->set_enable(dev, enable);
	177	if (!ret) {
	178	if (uc_pdata->ramp_delay && !old_enable && enable) {
	179	int uV = regulator_get_value(dev);
	180
	181	if (uV > 0) {
	182	regulator_set_value_ramp_delay(dev, 0, uV,
	183	uc_pdata->ramp_delay);
	184	}
	185	}
	186	}
	187
	188	return ret;
af41e8db PM	189	}
af41e8db PM	190
cc4a224a LV	191	int regulator_set_enable_if_allowed(struct udevice *dev, bool enable)
	192	{
	193	int ret;
	194
	195	ret = regulator_set_enable(dev, enable);
	196	if (ret == -ENOSYS \|\| ret == -EACCES)
	197	return 0;
	198
	199	return ret;
	200	}
	201
11406b8f JC	202	int regulator_set_suspend_enable(struct udevice *dev, bool enable)
	203	{
	204	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	205
	206	if (!ops->set_suspend_enable)
	207	return -ENOSYS;
	208
	209	return ops->set_suspend_enable(dev, enable);
	210	}
	211
	212	int regulator_get_suspend_enable(struct udevice *dev)
	213	{
	214	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	215
	216	if (!ops->get_suspend_enable)
	217	return -ENOSYS;
	218
	219	return ops->get_suspend_enable(dev);
	220	}
	221
af41e8db PM	222	int regulator_get_mode(struct udevice *dev)
	223	{
	224	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	225
	226	if (!ops \|\| !ops->get_mode)
	227	return -ENOSYS;
	228
	229	return ops->get_mode(dev);
	230	}
	231
	232	int regulator_set_mode(struct udevice *dev, int mode)
	233	{
	234	const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
	235
	236	if (!ops \|\| !ops->set_mode)
	237	return -ENOSYS;
	238
	239	return ops->set_mode(dev, mode);
	240	}
	241
3b880757	242	int regulator_get_by_platname(const char plat_name, struct udevice *devp)
af41e8db PM	243	{
	244	struct dm_regulator_uclass_platdata *uc_pdata;
	245	struct udevice *dev;
3b880757	246	int ret;
af41e8db PM	247
	248	*devp = NULL;
	249
3b880757 PM	250	for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
3b880757 PM	251	ret = uclass_find_next_device(&dev)) {
422f04b6 SG	252	if (ret) {
422f04b6 SG	253	debug("regulator %s, ret=%d\n", dev->name, ret);
3b880757	254	continue;
422f04b6	255	}
3b880757	256
af41e8db PM	257	uc_pdata = dev_get_uclass_platdata(dev);
	258	if (!uc_pdata \|\| strcmp(plat_name, uc_pdata->name))
	259	continue;
	260
	261	return uclass_get_device_tail(dev, 0, devp);
	262	}
	263
422f04b6	264	debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
af41e8db PM	265
	266	return -ENODEV;
	267	}
	268
3b880757	269	int regulator_get_by_devname(const char devname, struct udevice *devp)
af41e8db PM	270	{
	271	return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
	272	}
	273
7c816e24 PM	274	int device_get_supply_regulator(struct udevice dev, const char supply_name,
	275	struct udevice **devp)
	276	{
	277	return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
	278	supply_name, devp);
	279	}
	280
3b55d30f	281	int regulator_autoset(struct udevice *dev)
af41e8db	282	{
3b55d30f SG	283	struct dm_regulator_uclass_platdata *uc_pdata;
3b55d30f SG	284	int ret = 0;
af41e8db	285
3b55d30f	286	uc_pdata = dev_get_uclass_platdata(dev);
11406b8f JC	287
	288	ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on);
	289	if (!ret && uc_pdata->suspend_on) {
	290	ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV);
	291	if (!ret)
	292	return ret;
	293	}
	294
3b55d30f SG	295	if (!uc_pdata->always_on && !uc_pdata->boot_on)
3b55d30f SG	296	return -EMEDIUMTYPE;
af41e8db	297
1164c546 SS	298	if (uc_pdata->type == REGULATOR_TYPE_FIXED)
	299	return regulator_set_enable(dev, true);
	300
3b55d30f SG	301	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
3b55d30f SG	302	ret = regulator_set_value(dev, uc_pdata->min_uV);
11406b8f JC	303	if (uc_pdata->init_uV > 0)
11406b8f JC	304	ret = regulator_set_value(dev, uc_pdata->init_uV);
3b55d30f SG	305	if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
3b55d30f SG	306	ret = regulator_set_current(dev, uc_pdata->min_uA);
af41e8db PM	307
af41e8db PM	308	if (!ret)
3b55d30f	309	ret = regulator_set_enable(dev, true);
af41e8db PM	310
	311	return ret;
	312	}
	313
3b55d30f	314	static void regulator_show(struct udevice *dev, int ret)
af41e8db PM	315	{
af41e8db PM	316	struct dm_regulator_uclass_platdata *uc_pdata;
af41e8db PM	317
af41e8db PM	318	uc_pdata = dev_get_uclass_platdata(dev);
3b880757	319
3b55d30f SG	320	printf("%s@%s: ", dev->name, uc_pdata->name);
	321	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
	322	printf("set %d uV", uc_pdata->min_uV);
	323	if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
	324	printf("; set %d uA", uc_pdata->min_uA);
	325	printf("; enabling");
	326	if (ret)
7d577999	327	printf(" (ret: %d)", ret);
3b55d30f SG	328	printf("\n");
3b55d30f SG	329	}
af41e8db	330
3b55d30f SG	331	int regulator_autoset_by_name(const char platname, struct udevice *devp)
	332	{
	333	struct udevice *dev;
	334	int ret;
af41e8db	335
3b55d30f	336	ret = regulator_get_by_platname(platname, &dev);
af41e8db PM	337	if (devp)
af41e8db PM	338	*devp = dev;
3b55d30f	339	if (ret) {
422f04b6	340	debug("Can get the regulator: %s (err=%d)\n", platname, ret);
3b55d30f SG	341	return ret;
3b55d30f SG	342	}
3b880757	343
3b55d30f	344	return regulator_autoset(dev);
af41e8db PM	345	}
af41e8db PM	346
3b880757 PM	347	int regulator_list_autoset(const char *list_platname[],
	348	struct udevice *list_devp[],
	349	bool verbose)
af41e8db PM	350	{
af41e8db PM	351	struct udevice *dev;
3b880757	352	int error = 0, i = 0, ret;
af41e8db	353
3b880757	354	while (list_platname[i]) {
3b55d30f SG	355	ret = regulator_autoset_by_name(list_platname[i], &dev);
	356	if (ret != -EMEDIUMTYPE && verbose)
	357	regulator_show(dev, ret);
3b880757 PM	358	if (ret & !error)
	359	error = ret;
	360
	361	if (list_devp)
	362	list_devp[i] = dev;
	363
	364	i++;
	365	}
af41e8db	366
3b880757 PM	367	return error;
	368	}
	369
	370	static bool regulator_name_is_unique(struct udevice *check_dev,
	371	const char *check_name)
	372	{
	373	struct dm_regulator_uclass_platdata *uc_pdata;
	374	struct udevice *dev;
	375	int check_len = strlen(check_name);
	376	int ret;
	377	int len;
	378
	379	for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
	380	ret = uclass_find_next_device(&dev)) {
	381	if (ret \|\| dev == check_dev)
af41e8db PM	382	continue;
af41e8db PM	383
3b880757 PM	384	uc_pdata = dev_get_uclass_platdata(dev);
	385	len = strlen(uc_pdata->name);
	386	if (len != check_len)
	387	continue;
	388
	389	if (!strcmp(uc_pdata->name, check_name))
	390	return false;
af41e8db PM	391	}
af41e8db PM	392
3b880757	393	return true;
af41e8db PM	394	}
	395
	396	static int regulator_post_bind(struct udevice *dev)
	397	{
	398	struct dm_regulator_uclass_platdata *uc_pdata;
3b880757	399	const char *property = "regulator-name";
af41e8db PM	400
af41e8db PM	401	uc_pdata = dev_get_uclass_platdata(dev);
af41e8db PM	402
af41e8db PM	403	/* Regulator's mandatory constraint */
f15cd4f1	404	uc_pdata->name = dev_read_string(dev, property);
af41e8db	405	if (!uc_pdata->name) {
f15cd4f1 SG	406	debug("%s: dev '%s' has no property '%s'\n",
	407	__func__, dev->name, property);
	408	uc_pdata->name = dev_read_name(dev);
cf260011 PF	409	if (!uc_pdata->name)
cf260011 PF	410	return -EINVAL;
af41e8db PM	411	}
af41e8db PM	412
3b880757 PM	413	if (regulator_name_is_unique(dev, uc_pdata->name))
	414	return 0;
	415
f15cd4f1	416	debug("'%s' of dev: '%s', has nonunique value: '%s\n",
3b880757 PM	417	property, dev->name, uc_pdata->name);
	418
	419	return -EINVAL;
af41e8db PM	420	}
	421
	422	static int regulator_pre_probe(struct udevice *dev)
	423	{
	424	struct dm_regulator_uclass_platdata *uc_pdata;
11406b8f	425	ofnode node;
af41e8db PM	426
	427	uc_pdata = dev_get_uclass_platdata(dev);
	428	if (!uc_pdata)
	429	return -ENXIO;
	430
	431	/* Regulator's optional constraints */
f15cd4f1 SG	432	uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
	433	-ENODATA);
	434	uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
	435	-ENODATA);
11406b8f JC	436	uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt",
11406b8f JC	437	-ENODATA);
f15cd4f1 SG	438	uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
	439	-ENODATA);
	440	uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
	441	-ENODATA);
	442	uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
	443	uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
e66d1cb3 KK	444	uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
e66d1cb3 KK	445	0);
af41e8db	446
11406b8f JC	447	node = dev_read_subnode(dev, "regulator-state-mem");
	448	if (ofnode_valid(node)) {
	449	uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend");
	450	if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV))
	451	uc_pdata->suspend_uV = uc_pdata->max_uV;
	452	} else {
	453	uc_pdata->suspend_on = true;
	454	uc_pdata->suspend_uV = uc_pdata->max_uV;
	455	}
	456
7837ceab SG	457	/* Those values are optional (-ENODATA if unset) */
	458	if ((uc_pdata->min_uV != -ENODATA) &&
	459	(uc_pdata->max_uV != -ENODATA) &&
	460	(uc_pdata->min_uV == uc_pdata->max_uV))
	461	uc_pdata->flags \|= REGULATOR_FLAG_AUTOSET_UV;
	462
	463	/* Those values are optional (-ENODATA if unset) */
	464	if ((uc_pdata->min_uA != -ENODATA) &&
	465	(uc_pdata->max_uA != -ENODATA) &&
	466	(uc_pdata->min_uA == uc_pdata->max_uA))
	467	uc_pdata->flags \|= REGULATOR_FLAG_AUTOSET_UA;
	468
b7adcdd0 LM	469	if (uc_pdata->boot_on)
	470	regulator_set_enable(dev, uc_pdata->boot_on);
	471
af41e8db PM	472	return 0;
	473	}
	474
083fc83a SG	475	int regulators_enable_boot_on(bool verbose)
	476	{
	477	struct udevice *dev;
	478	struct uclass *uc;
	479	int ret;
	480
	481	ret = uclass_get(UCLASS_REGULATOR, &uc);
	482	if (ret)
	483	return ret;
	484	for (uclass_first_device(UCLASS_REGULATOR, &dev);
3f603cbb	485	dev;
083fc83a SG	486	uclass_next_device(&dev)) {
083fc83a SG	487	ret = regulator_autoset(dev);
d08504d1 SG	488	if (ret == -EMEDIUMTYPE) {
d08504d1 SG	489	ret = 0;
083fc83a	490	continue;
d08504d1	491	}
083fc83a SG	492	if (verbose)
083fc83a SG	493	regulator_show(dev, ret);
364809de SG	494	if (ret == -ENOSYS)
364809de SG	495	ret = 0;
083fc83a SG	496	}
	497
	498	return ret;
	499	}
	500
af41e8db PM	501	UCLASS_DRIVER(regulator) = {
	502	.id = UCLASS_REGULATOR,
	503	.name = "regulator",
	504	.post_bind = regulator_post_bind,
	505	.pre_probe = regulator_pre_probe,
	506	.per_device_platdata_auto_alloc_size =
	507	sizeof(struct dm_regulator_uclass_platdata),
	508	};