[linux.git] / drivers / mfd / mfd-core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/mfd/mfd-core.c
 *
 * core MFD support
 * Copyright (c) 2006 Ian Molton
 * Copyright (c) 2007,2008 Dmitry Baryshkov
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/list.h>
#include <linux/property.h>
#include <linux/mfd/core.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/regulator/consumer.h>

static LIST_HEAD(mfd_of_node_list);

struct mfd_of_node_entry {
	struct list_head list;
	struct device *dev;
	struct device_node *np;
};

static struct device_type mfd_dev_type = {
	.name	= "mfd_device",
};

int mfd_cell_enable(struct platform_device *pdev)
{
	const struct mfd_cell *cell = mfd_get_cell(pdev);

	if (!cell->enable) {
		dev_dbg(&pdev->dev, "No .enable() call-back registered\n");
		return 0;
	}

	return cell->enable(pdev);
}
EXPORT_SYMBOL(mfd_cell_enable);

int mfd_cell_disable(struct platform_device *pdev)
{
	const struct mfd_cell *cell = mfd_get_cell(pdev);

	if (!cell->disable) {
		dev_dbg(&pdev->dev, "No .disable() call-back registered\n");
		return 0;
	}

	return cell->disable(pdev);
}
EXPORT_SYMBOL(mfd_cell_disable);

#if IS_ENABLED(CONFIG_ACPI)
static void mfd_acpi_add_device(const struct mfd_cell *cell,
				struct platform_device *pdev)
{
	const struct mfd_cell_acpi_match *match = cell->acpi_match;
	struct acpi_device *parent, *child;
	struct acpi_device *adev;

	parent = ACPI_COMPANION(pdev->dev.parent);
	if (!parent)
		return;

	/*
	 * MFD child device gets its ACPI handle either from the ACPI device
	 * directly under the parent that matches the either _HID or _CID, or
	 * _ADR or it will use the parent handle if is no ID is given.
	 *
	 * Note that use of _ADR is a grey area in the ACPI specification,
	 * though Intel Galileo Gen2 is using it to distinguish the children
	 * devices.
	 */
	adev = parent;
	if (match) {
		if (match->pnpid) {
			struct acpi_device_id ids[2] = {};

			strlcpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
			list_for_each_entry(child, &parent->children, node) {
				if (!acpi_match_device_ids(child, ids)) {
					adev = child;
					break;
				}
			}
		} else {
			unsigned long long adr;
			acpi_status status;

			list_for_each_entry(child, &parent->children, node) {
				status = acpi_evaluate_integer(child->handle,
							       "_ADR", NULL,
							       &adr);
				if (ACPI_SUCCESS(status) && match->adr == adr) {
					adev = child;
					break;
				}
			}
		}
	}

	ACPI_COMPANION_SET(&pdev->dev, adev);
}
#else
static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
				       struct platform_device *pdev)
{
}
#endif

static int mfd_match_of_node_to_dev(struct platform_device *pdev,
				    struct device_node *np,
				    const struct mfd_cell *cell)
{
#if IS_ENABLED(CONFIG_OF)
	struct mfd_of_node_entry *of_entry;
	const __be32 *reg;
	u64 of_node_addr;

	/* Skip devices 'disabled' by Device Tree */
	if (!of_device_is_available(np))
		return -ENODEV;

	/* Skip if OF node has previously been allocated to a device */
	list_for_each_entry(of_entry, &mfd_of_node_list, list)
		if (of_entry->np == np)
			return -EAGAIN;

	if (!cell->use_of_reg)
		/* No of_reg defined - allocate first free compatible match */
		goto allocate_of_node;

	/* We only care about each node's first defined address */
	reg = of_get_address(np, 0, NULL, NULL);
	if (!reg)
		/* OF node does not contatin a 'reg' property to match to */
		return -EAGAIN;

	of_node_addr = of_read_number(reg, of_n_addr_cells(np));

	if (cell->of_reg != of_node_addr)
		/* No match */
		return -EAGAIN;

allocate_of_node:
	of_entry = kzalloc(sizeof(*of_entry), GFP_KERNEL);
	if (!of_entry)
		return -ENOMEM;

	of_entry->dev = &pdev->dev;
	of_entry->np = np;
	list_add_tail(&of_entry->list, &mfd_of_node_list);

	pdev->dev.of_node = np;
	pdev->dev.fwnode = &np->fwnode;
#endif
	return 0;
}

static int mfd_add_device(struct device *parent, int id,
			  const struct mfd_cell *cell,
			  struct resource *mem_base,
			  int irq_base, struct irq_domain *domain)
{
	struct resource *res;
	struct platform_device *pdev;
	struct device_node *np = NULL;
	struct mfd_of_node_entry *of_entry, *tmp;
	int ret = -ENOMEM;
	int platform_id;
	int r;

	if (id == PLATFORM_DEVID_AUTO)
		platform_id = id;
	else
		platform_id = id + cell->id;

	pdev = platform_device_alloc(cell->name, platform_id);
	if (!pdev)
		goto fail_alloc;

	pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
	if (!pdev->mfd_cell)
		goto fail_device;

	res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
	if (!res)
		goto fail_device;

	pdev->dev.parent = parent;
	pdev->dev.type = &mfd_dev_type;
	pdev->dev.dma_mask = parent->dma_mask;
	pdev->dev.dma_parms = parent->dma_parms;
	pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;

	ret = regulator_bulk_register_supply_alias(
			&pdev->dev, cell->parent_supplies,
			parent, cell->parent_supplies,
			cell->num_parent_supplies);
	if (ret < 0)
		goto fail_res;

	if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
		for_each_child_of_node(parent->of_node, np) {
			if (of_device_is_compatible(np, cell->of_compatible)) {
				ret = mfd_match_of_node_to_dev(pdev, np, cell);
				if (ret == -EAGAIN)
					continue;
				if (ret)
					goto fail_alias;

				break;
			}
		}

		if (!pdev->dev.of_node)
			pr_warn("%s: Failed to locate of_node [id: %d]\n",
				cell->name, platform_id);
	}

	mfd_acpi_add_device(cell, pdev);

	if (cell->pdata_size) {
		ret = platform_device_add_data(pdev,
					cell->platform_data, cell->pdata_size);
		if (ret)
			goto fail_of_entry;
	}

	if (cell->properties) {
		ret = platform_device_add_properties(pdev, cell->properties);
		if (ret)
			goto fail_of_entry;
	}

	for (r = 0; r < cell->num_resources; r++) {
		res[r].name = cell->resources[r].name;
		res[r].flags = cell->resources[r].flags;

		/* Find out base to use */
		if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
			res[r].parent = mem_base;
			res[r].start = mem_base->start +
				cell->resources[r].start;
			res[r].end = mem_base->start +
				cell->resources[r].end;
		} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
			if (domain) {
				/* Unable to create mappings for IRQ ranges. */
				WARN_ON(cell->resources[r].start !=
					cell->resources[r].end);
				res[r].start = res[r].end = irq_create_mapping(
					domain, cell->resources[r].start);
			} else {
				res[r].start = irq_base +
					cell->resources[r].start;
				res[r].end   = irq_base +
					cell->resources[r].end;
			}
		} else {
			res[r].parent = cell->resources[r].parent;
			res[r].start = cell->resources[r].start;
			res[r].end   = cell->resources[r].end;
		}

		if (!cell->ignore_resource_conflicts) {
			if (has_acpi_companion(&pdev->dev)) {
				ret = acpi_check_resource_conflict(&res[r]);
				if (ret)
					goto fail_of_entry;
			}
		}
	}

	ret = platform_device_add_resources(pdev, res, cell->num_resources);
	if (ret)
		goto fail_of_entry;

	ret = platform_device_add(pdev);
	if (ret)
		goto fail_of_entry;

	if (cell->pm_runtime_no_callbacks)
		pm_runtime_no_callbacks(&pdev->dev);

	kfree(res);

	return 0;

fail_of_entry:
	list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
		if (of_entry->dev == &pdev->dev) {
			list_del(&of_entry->list);
			kfree(of_entry);
		}
fail_alias:
	regulator_bulk_unregister_supply_alias(&pdev->dev,
					       cell->parent_supplies,
					       cell->num_parent_supplies);
fail_res:
	kfree(res);
fail_device:
	platform_device_put(pdev);
fail_alloc:
	return ret;
}

/**
 * mfd_add_devices - register child devices
 *
 * @parent:	Pointer to parent device.
 * @id:		Can be PLATFORM_DEVID_AUTO to let the Platform API take care
 *		of device numbering, or will be added to a device's cell_id.
 * @cells:	Array of (struct mfd_cell)s describing child devices.
 * @n_devs:	Number of child devices to register.
 * @mem_base:	Parent register range resource for child devices.
 * @irq_base:	Base of the range of virtual interrupt numbers allocated for
 *		this MFD device. Unused if @domain is specified.
 * @domain:	Interrupt domain to create mappings for hardware interrupts.
 */
int mfd_add_devices(struct device *parent, int id,
		    const struct mfd_cell *cells, int n_devs,
		    struct resource *mem_base,
		    int irq_base, struct irq_domain *domain)
{
	int i;
	int ret;

	for (i = 0; i < n_devs; i++) {
		ret = mfd_add_device(parent, id, cells + i, mem_base,
				     irq_base, domain);
		if (ret)
			goto fail;
	}

	return 0;

fail:
	if (i)
		mfd_remove_devices(parent);

	return ret;
}
EXPORT_SYMBOL(mfd_add_devices);

static int mfd_remove_devices_fn(struct device *dev, void *data)
{
	struct platform_device *pdev;
	const struct mfd_cell *cell;
	int *level = data;

	if (dev->type != &mfd_dev_type)
		return 0;

	pdev = to_platform_device(dev);
	cell = mfd_get_cell(pdev);

	if (level && cell->level > *level)
		return 0;

	regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
					       cell->num_parent_supplies);

	platform_device_unregister(pdev);
	return 0;
}

void mfd_remove_devices_late(struct device *parent)
{
	int level = MFD_DEP_LEVEL_HIGH;

	device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
}
EXPORT_SYMBOL(mfd_remove_devices_late);

void mfd_remove_devices(struct device *parent)
{
	int level = MFD_DEP_LEVEL_NORMAL;

	device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
}
EXPORT_SYMBOL(mfd_remove_devices);

static void devm_mfd_dev_release(struct device *dev, void *res)
{
	mfd_remove_devices(dev);
}

/**
 * devm_mfd_add_devices - Resource managed version of mfd_add_devices()
 *
 * Returns 0 on success or an appropriate negative error number on failure.
 * All child-devices of the MFD will automatically be removed when it gets
 * unbinded.
 *
 * @dev:	Pointer to parent device.
 * @id:		Can be PLATFORM_DEVID_AUTO to let the Platform API take care
 *		of device numbering, or will be added to a device's cell_id.
 * @cells:	Array of (struct mfd_cell)s describing child devices.
 * @n_devs:	Number of child devices to register.
 * @mem_base:	Parent register range resource for child devices.
 * @irq_base:	Base of the range of virtual interrupt numbers allocated for
 *		this MFD device. Unused if @domain is specified.
 * @domain:	Interrupt domain to create mappings for hardware interrupts.
 */
int devm_mfd_add_devices(struct device *dev, int id,
			 const struct mfd_cell *cells, int n_devs,
			 struct resource *mem_base,
			 int irq_base, struct irq_domain *domain)
{
	struct device **ptr;
	int ret;

	ptr = devres_alloc(devm_mfd_dev_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return -ENOMEM;

	ret = mfd_add_devices(dev, id, cells, n_devs, mem_base,
			      irq_base, domain);
	if (ret < 0) {
		devres_free(ptr);
		return ret;
	}

	*ptr = dev;
	devres_add(dev, ptr);

	return ret;
}
EXPORT_SYMBOL(devm_mfd_add_devices);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
aa613de6 DB	2	/*
	3	* drivers/mfd/mfd-core.c
	4	*
	5	* core MFD support
	6	* Copyright (c) 2006 Ian Molton
	7	* Copyright (c) 2007,2008 Dmitry Baryshkov
aa613de6 DB	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/platform_device.h>
91fedede	12	#include <linux/acpi.h>
466a62d7	13	#include <linux/list.h>
4d215cab	14	#include <linux/property.h>
aa613de6	15	#include <linux/mfd/core.h>
4c90aa94	16	#include <linux/pm_runtime.h>
5a0e3ad6	17	#include <linux/slab.h>
4e36dd33	18	#include <linux/module.h>
c94bb233 LJ	19	#include <linux/irqdomain.h>
c94bb233 LJ	20	#include <linux/of.h>
466a62d7	21	#include <linux/of_address.h>
7fcd4274	22	#include <linux/regulator/consumer.h>
aa613de6	23
466a62d7 LJ	24	static LIST_HEAD(mfd_of_node_list);
	25
	26	struct mfd_of_node_entry {
	27	struct list_head list;
	28	struct device *dev;
	29	struct device_node *np;
	30	};
	31
b9fbb62e CK	32	static struct device_type mfd_dev_type = {
	33	.name = "mfd_device",
	34	};
	35
f77289ac	36	int mfd_cell_enable(struct platform_device *pdev)
1e29af62 AS	37	{
1e29af62 AS	38	const struct mfd_cell *cell = mfd_get_cell(pdev);
1e29af62	39
b195e101 LJ	40	if (!cell->enable) {
	41	dev_dbg(&pdev->dev, "No .enable() call-back registered\n");
	42	return 0;
	43	}
	44
5a47c0fb	45	return cell->enable(pdev);
1e29af62	46	}
f77289ac	47	EXPORT_SYMBOL(mfd_cell_enable);
1e29af62	48
f77289ac	49	int mfd_cell_disable(struct platform_device *pdev)
1e29af62 AS	50	{
1e29af62 AS	51	const struct mfd_cell *cell = mfd_get_cell(pdev);
1e29af62	52
b195e101 LJ	53	if (!cell->disable) {
	54	dev_dbg(&pdev->dev, "No .disable() call-back registered\n");
	55	return 0;
	56	}
	57
5a47c0fb	58	return cell->disable(pdev);
1e29af62	59	}
f77289ac	60	EXPORT_SYMBOL(mfd_cell_disable);
1e29af62	61
6ab34301 MW	62	#if IS_ENABLED(CONFIG_ACPI)
	63	static void mfd_acpi_add_device(const struct mfd_cell *cell,
	64	struct platform_device *pdev)
	65	{
98a3be44 AS	66	const struct mfd_cell_acpi_match *match = cell->acpi_match;
98a3be44 AS	67	struct acpi_device parent, child;
6ab34301 MW	68	struct acpi_device *adev;
6ab34301 MW	69
98a3be44 AS	70	parent = ACPI_COMPANION(pdev->dev.parent);
98a3be44 AS	71	if (!parent)
6ab34301 MW	72	return;
	73
	74	/*
98a3be44 AS	75	* MFD child device gets its ACPI handle either from the ACPI device
	76	* directly under the parent that matches the either _HID or _CID, or
	77	* _ADR or it will use the parent handle if is no ID is given.
	78	*
	79	* Note that use of _ADR is a grey area in the ACPI specification,
	80	* though Intel Galileo Gen2 is using it to distinguish the children
	81	* devices.
6ab34301	82	*/
98a3be44 AS	83	adev = parent;
	84	if (match) {
	85	if (match->pnpid) {
	86	struct acpi_device_id ids[2] = {};
	87
	88	strlcpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
	89	list_for_each_entry(child, &parent->children, node) {
ee414de5	90	if (!acpi_match_device_ids(child, ids)) {
98a3be44 AS	91	adev = child;
	92	break;
	93	}
6ab34301	94	}
98a3be44 AS	95	} else {
	96	unsigned long long adr;
	97	acpi_status status;
	98
	99	list_for_each_entry(child, &parent->children, node) {
	100	status = acpi_evaluate_integer(child->handle,
	101	"_ADR", NULL,
	102	&adr);
	103	if (ACPI_SUCCESS(status) && match->adr == adr) {
	104	adev = child;
	105	break;
	106	}
	107	}
	108	}
6ab34301 MW	109	}
	110
	111	ACPI_COMPANION_SET(&pdev->dev, adev);
	112	}
	113	#else
	114	static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
	115	struct platform_device *pdev)
	116	{
	117	}
	118	#endif
	119
466a62d7 LJ	120	static int mfd_match_of_node_to_dev(struct platform_device *pdev,
	121	struct device_node *np,
	122	const struct mfd_cell *cell)
	123	{
	124	#if IS_ENABLED(CONFIG_OF)
	125	struct mfd_of_node_entry *of_entry;
	126	const __be32 *reg;
	127	u64 of_node_addr;
	128
	129	/* Skip devices 'disabled' by Device Tree */
	130	if (!of_device_is_available(np))
	131	return -ENODEV;
	132
	133	/* Skip if OF node has previously been allocated to a device */
	134	list_for_each_entry(of_entry, &mfd_of_node_list, list)
	135	if (of_entry->np == np)
	136	return -EAGAIN;
	137
	138	if (!cell->use_of_reg)
	139	/* No of_reg defined - allocate first free compatible match */
	140	goto allocate_of_node;
	141
	142	/* We only care about each node's first defined address */
	143	reg = of_get_address(np, 0, NULL, NULL);
	144	if (!reg)
	145	/* OF node does not contatin a 'reg' property to match to */
	146	return -EAGAIN;
	147
	148	of_node_addr = of_read_number(reg, of_n_addr_cells(np));
	149
	150	if (cell->of_reg != of_node_addr)
	151	/* No match */
	152	return -EAGAIN;
	153
	154	allocate_of_node:
	155	of_entry = kzalloc(sizeof(*of_entry), GFP_KERNEL);
	156	if (!of_entry)
	157	return -ENOMEM;
	158
	159	of_entry->dev = &pdev->dev;
	160	of_entry->np = np;
	161	list_add_tail(&of_entry->list, &mfd_of_node_list);
	162
	163	pdev->dev.of_node = np;
	164	pdev->dev.fwnode = &np->fwnode;
	165	#endif
	166	return 0;
	167	}
	168
424f525a	169	static int mfd_add_device(struct device *parent, int id,
5a47c0fb	170	const struct mfd_cell *cell,
7f71ac93	171	struct resource *mem_base,
0848c94f	172	int irq_base, struct irq_domain *domain)
aa613de6	173	{
a87903f3	174	struct resource *res;
aa613de6	175	struct platform_device *pdev;
c94bb233	176	struct device_node *np = NULL;
466a62d7	177	struct mfd_of_node_entry of_entry, tmp;
aa613de6	178	int ret = -ENOMEM;
6e3f62f0	179	int platform_id;
aa613de6 DB	180	int r;
aa613de6 DB	181
a77c50b4	182	if (id == PLATFORM_DEVID_AUTO)
6e3f62f0 JH	183	platform_id = id;
	184	else
	185	platform_id = id + cell->id;
	186
	187	pdev = platform_device_alloc(cell->name, platform_id);
aa613de6 DB	188	if (!pdev)
	189	goto fail_alloc;
	190
b944a688 LJ	191	pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
	192	if (!pdev->mfd_cell)
	193	goto fail_device;
	194
6396bb22	195	res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
a87903f3 IM	196	if (!res)
	197	goto fail_device;
	198
424f525a	199	pdev->dev.parent = parent;
b9fbb62e	200	pdev->dev.type = &mfd_dev_type;
b018e136 BS	201	pdev->dev.dma_mask = parent->dma_mask;
b018e136 BS	202	pdev->dev.dma_parms = parent->dma_parms;
4f08df1b	203	pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;
aa613de6	204
d137be00	205	ret = regulator_bulk_register_supply_alias(
7fcd4274 CK	206	&pdev->dev, cell->parent_supplies,
	207	parent, cell->parent_supplies,
	208	cell->num_parent_supplies);
	209	if (ret < 0)
	210	goto fail_res;
	211
466a62d7	212	if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
c94bb233 LJ	213	for_each_child_of_node(parent->of_node, np) {
c94bb233 LJ	214	if (of_device_is_compatible(np, cell->of_compatible)) {
466a62d7 LJ	215	ret = mfd_match_of_node_to_dev(pdev, np, cell);
	216	if (ret == -EAGAIN)
	217	continue;
	218	if (ret)
6b5c3506	219	goto fail_alias;
466a62d7	220
c94bb233 LJ	221	break;
	222	}
	223	}
466a62d7 LJ	224
	225	if (!pdev->dev.of_node)
	226	pr_warn("%s: Failed to locate of_node [id: %d]\n",
	227	cell->name, platform_id);
c94bb233 LJ	228	}
c94bb233 LJ	229
6ab34301 MW	230	mfd_acpi_add_device(cell, pdev);
6ab34301 MW	231
eb895607 SO	232	if (cell->pdata_size) {
	233	ret = platform_device_add_data(pdev,
	234	cell->platform_data, cell->pdata_size);
	235	if (ret)
466a62d7	236	goto fail_of_entry;
eb895607 SO	237	}
eb895607 SO	238
f4d05266 HK	239	if (cell->properties) {
f4d05266 HK	240	ret = platform_device_add_properties(pdev, cell->properties);
4d215cab	241	if (ret)
466a62d7	242	goto fail_of_entry;
4d215cab AS	243	}
4d215cab AS	244
aa613de6 DB	245	for (r = 0; r < cell->num_resources; r++) {
	246	res[r].name = cell->resources[r].name;
	247	res[r].flags = cell->resources[r].flags;
	248
	249	/* Find out base to use */
f03cfcbc	250	if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
aa613de6 DB	251	res[r].parent = mem_base;
	252	res[r].start = mem_base->start +
	253	cell->resources[r].start;
	254	res[r].end = mem_base->start +
	255	cell->resources[r].end;
	256	} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
c94bb233 LJ	257	if (domain) {
	258	/* Unable to create mappings for IRQ ranges. */
	259	WARN_ON(cell->resources[r].start !=
	260	cell->resources[r].end);
	261	res[r].start = res[r].end = irq_create_mapping(
	262	domain, cell->resources[r].start);
	263	} else {
	264	res[r].start = irq_base +
	265	cell->resources[r].start;
	266	res[r].end = irq_base +
	267	cell->resources[r].end;
	268	}
aa613de6 DB	269	} else {
	270	res[r].parent = cell->resources[r].parent;
	271	res[r].start = cell->resources[r].start;
	272	res[r].end = cell->resources[r].end;
	273	}
91fedede	274
5f2545fa	275	if (!cell->ignore_resource_conflicts) {
ec40c606 LP	276	if (has_acpi_companion(&pdev->dev)) {
	277	ret = acpi_check_resource_conflict(&res[r]);
	278	if (ret)
466a62d7	279	goto fail_of_entry;
ec40c606	280	}
5f2545fa	281	}
aa613de6 DB	282	}
aa613de6 DB	283
8af5fe3b AL	284	ret = platform_device_add_resources(pdev, res, cell->num_resources);
8af5fe3b AL	285	if (ret)
466a62d7	286	goto fail_of_entry;
aa613de6 DB	287
	288	ret = platform_device_add(pdev);
	289	if (ret)
466a62d7	290	goto fail_of_entry;
a87903f3	291
4c90aa94 MB	292	if (cell->pm_runtime_no_callbacks)
	293	pm_runtime_no_callbacks(&pdev->dev);
	294
a87903f3	295	kfree(res);
aa613de6 DB	296
	297	return 0;
	298
466a62d7 LJ	299	fail_of_entry:
	300	list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
	301	if (of_entry->dev == &pdev->dev) {
	302	list_del(&of_entry->list);
	303	kfree(of_entry);
	304	}
7fcd4274	305	fail_alias:
d137be00 CK	306	regulator_bulk_unregister_supply_alias(&pdev->dev,
	307	cell->parent_supplies,
	308	cell->num_parent_supplies);
a87903f3 IM	309	fail_res:
a87903f3 IM	310	kfree(res);
aa613de6 DB	311	fail_device:
	312	platform_device_put(pdev);
	313	fail_alloc:
	314	return ret;
	315	}
	316
1946f996 BG	317	/**
	318	* mfd_add_devices - register child devices
	319	*
	320	* @parent: Pointer to parent device.
	321	* @id: Can be PLATFORM_DEVID_AUTO to let the Platform API take care
	322	* of device numbering, or will be added to a device's cell_id.
	323	* @cells: Array of (struct mfd_cell)s describing child devices.
	324	* @n_devs: Number of child devices to register.
	325	* @mem_base: Parent register range resource for child devices.
	326	* @irq_base: Base of the range of virtual interrupt numbers allocated for
	327	* this MFD device. Unused if @domain is specified.
	328	* @domain: Interrupt domain to create mappings for hardware interrupts.
	329	*/
424f525a	330	int mfd_add_devices(struct device *parent, int id,
03e361b2	331	const struct mfd_cell *cells, int n_devs,
7f71ac93	332	struct resource *mem_base,
0848c94f	333	int irq_base, struct irq_domain *domain)
aa613de6 DB	334	{
aa613de6 DB	335	int i;
0b208e41	336	int ret;
aa613de6 DB	337
aa613de6 DB	338	for (i = 0; i < n_devs; i++) {
5a47c0fb	339	ret = mfd_add_device(parent, id, cells + i, mem_base,
0848c94f	340	irq_base, domain);
aa613de6	341	if (ret)
0b208e41	342	goto fail;
aa613de6 DB	343	}
aa613de6 DB	344
0b208e41	345	return 0;
aa613de6	346
0b208e41 GU	347	fail:
	348	if (i)
	349	mfd_remove_devices(parent);
5a47c0fb	350
aa613de6 DB	351	return ret;
	352	}
	353	EXPORT_SYMBOL(mfd_add_devices);
	354
5a47c0fb	355	static int mfd_remove_devices_fn(struct device dev, void data)
aa613de6	356	{
b9fbb62e CK	357	struct platform_device *pdev;
b9fbb62e CK	358	const struct mfd_cell *cell;
114294d2	359	int *level = data;
1e29af62	360
b9fbb62e CK	361	if (dev->type != &mfd_dev_type)
	362	return 0;
	363
	364	pdev = to_platform_device(dev);
	365	cell = mfd_get_cell(pdev);
	366
114294d2 CK	367	if (level && cell->level > *level)
	368	return 0;
	369
d137be00 CK	370	regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
	371	cell->num_parent_supplies);
	372
1e29af62	373	platform_device_unregister(pdev);
aa613de6 DB	374	return 0;
	375	}
	376
114294d2 CK	377	void mfd_remove_devices_late(struct device *parent)
	378	{
	379	int level = MFD_DEP_LEVEL_HIGH;
	380
	381	device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
	382	}
	383	EXPORT_SYMBOL(mfd_remove_devices_late);
	384
424f525a	385	void mfd_remove_devices(struct device *parent)
aa613de6	386	{
114294d2 CK	387	int level = MFD_DEP_LEVEL_NORMAL;
	388
	389	device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
aa613de6 DB	390	}
	391	EXPORT_SYMBOL(mfd_remove_devices);
	392
a8f447be LD	393	static void devm_mfd_dev_release(struct device dev, void res)
	394	{
	395	mfd_remove_devices(dev);
	396	}
	397
	398	/**
	399	* devm_mfd_add_devices - Resource managed version of mfd_add_devices()
	400	*
	401	* Returns 0 on success or an appropriate negative error number on failure.
	402	* All child-devices of the MFD will automatically be removed when it gets
	403	* unbinded.
5a0ffef8 LJ	404	*
	405	* @dev: Pointer to parent device.
	406	* @id: Can be PLATFORM_DEVID_AUTO to let the Platform API take care
	407	* of device numbering, or will be added to a device's cell_id.
	408	* @cells: Array of (struct mfd_cell)s describing child devices.
	409	* @n_devs: Number of child devices to register.
	410	* @mem_base: Parent register range resource for child devices.
	411	* @irq_base: Base of the range of virtual interrupt numbers allocated for
	412	* this MFD device. Unused if @domain is specified.
	413	* @domain: Interrupt domain to create mappings for hardware interrupts.
a8f447be LD	414	*/
	415	int devm_mfd_add_devices(struct device *dev, int id,
	416	const struct mfd_cell *cells, int n_devs,
	417	struct resource *mem_base,
	418	int irq_base, struct irq_domain *domain)
	419	{
	420	struct device **ptr;
	421	int ret;
	422
	423	ptr = devres_alloc(devm_mfd_dev_release, sizeof(*ptr), GFP_KERNEL);
	424	if (!ptr)
	425	return -ENOMEM;
	426
	427	ret = mfd_add_devices(dev, id, cells, n_devs, mem_base,
	428	irq_base, domain);
	429	if (ret < 0) {
	430	devres_free(ptr);
	431	return ret;
	432	}
	433
	434	*ptr = dev;
	435	devres_add(dev, ptr);
	436
	437	return ret;
	438	}
	439	EXPORT_SYMBOL(devm_mfd_add_devices);
	440
aa613de6 DB	441	MODULE_LICENSE("GPL");
aa613de6 DB	442	MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");