[people/ms/u-boot.git] / drivers / core / device.c

/*
 * Device manager
 *
 * Copyright (c) 2013 Google, Inc
 *
 * (C) Copyright 2012
 * Pavel Herrmann <morpheus.ibis@gmail.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/uclass.h>
#include <dm/uclass-internal.h>
#include <dm/util.h>
#include <linux/err.h>
#include <linux/list.h>

DECLARE_GLOBAL_DATA_PTR;

int device_bind(struct udevice *parent, const struct driver *drv,
		const char *name, void *platdata, int of_offset,
		struct udevice **devp)
{
	struct udevice *dev;
	struct uclass *uc;
	int size, ret = 0;

	*devp = NULL;
	if (!name)
		return -EINVAL;

	ret = uclass_get(drv->id, &uc);
	if (ret)
		return ret;

	dev = calloc(1, sizeof(struct udevice));
	if (!dev)
		return -ENOMEM;

	INIT_LIST_HEAD(&dev->sibling_node);
	INIT_LIST_HEAD(&dev->child_head);
	INIT_LIST_HEAD(&dev->uclass_node);
	dev->platdata = platdata;
	dev->name = name;
	dev->of_offset = of_offset;
	dev->parent = parent;
	dev->driver = drv;
	dev->uclass = uc;

	dev->seq = -1;
	dev->req_seq = -1;
#ifdef CONFIG_OF_CONTROL
	/*
	 * Some devices, such as a SPI bus, I2C bus and serial ports are
	 * numbered using aliases.
	 *
	 * This is just a 'requested' sequence, and will be
	 * resolved (and ->seq updated) when the device is probed.
	 */
	if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
		if (uc->uc_drv->name && of_offset != -1) {
			fdtdec_get_alias_seq(gd->fdt_blob, uc->uc_drv->name,
					     of_offset, &dev->req_seq);
		}
	}
#endif
	if (!dev->platdata && drv->platdata_auto_alloc_size) {
		dev->flags |= DM_FLAG_ALLOC_PDATA;
		dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
		if (!dev->platdata) {
			ret = -ENOMEM;
			goto fail_alloc1;
		}
	}

	size = uc->uc_drv->per_device_platdata_auto_alloc_size;
	if (size) {
		dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA;
		dev->uclass_platdata = calloc(1, size);
		if (!dev->uclass_platdata) {
			ret = -ENOMEM;
			goto fail_alloc2;
		}
	}

	if (parent) {
		size = parent->driver->per_child_platdata_auto_alloc_size;
		if (!size) {
			size = parent->uclass->uc_drv->
					per_child_platdata_auto_alloc_size;
		}
		if (size) {
			dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA;
			dev->parent_platdata = calloc(1, size);
			if (!dev->parent_platdata) {
				ret = -ENOMEM;
				goto fail_alloc3;
			}
		}
	}

	/* put dev into parent's successor list */
	if (parent)
		list_add_tail(&dev->sibling_node, &parent->child_head);

	ret = uclass_bind_device(dev);
	if (ret)
		goto fail_uclass_bind;

	/* if we fail to bind we remove device from successors and free it */
	if (drv->bind) {
		ret = drv->bind(dev);
		if (ret)
			goto fail_bind;
	}
	if (parent && parent->driver->child_post_bind) {
		ret = parent->driver->child_post_bind(dev);
		if (ret)
			goto fail_child_post_bind;
	}

	if (parent)
		dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
	*devp = dev;

	return 0;

fail_child_post_bind:
	if (drv->unbind && drv->unbind(dev)) {
		dm_warn("unbind() method failed on dev '%s' on error path\n",
			dev->name);
	}

fail_bind:
	if (uclass_unbind_device(dev)) {
		dm_warn("Failed to unbind dev '%s' on error path\n",
			dev->name);
	}
fail_uclass_bind:
	list_del(&dev->sibling_node);
	if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
		free(dev->parent_platdata);
		dev->parent_platdata = NULL;
	}
fail_alloc3:
	if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
		free(dev->uclass_platdata);
		dev->uclass_platdata = NULL;
	}
fail_alloc2:
	if (dev->flags & DM_FLAG_ALLOC_PDATA) {
		free(dev->platdata);
		dev->platdata = NULL;
	}
fail_alloc1:
	free(dev);

	return ret;
}

int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
			const struct driver_info *info, struct udevice **devp)
{
	struct driver *drv;

	drv = lists_driver_lookup_name(info->name);
	if (!drv)
		return -ENOENT;
	if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
		return -EPERM;

	return device_bind(parent, drv, info->name, (void *)info->platdata,
			   -1, devp);
}

static void *alloc_priv(int size, uint flags)
{
	void *priv;

	if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
		priv = memalign(ARCH_DMA_MINALIGN, size);
		if (priv)
			memset(priv, '\0', size);
	} else {
		priv = calloc(1, size);
	}

	return priv;
}

int device_probe_child(struct udevice *dev, void *parent_priv)
{
	const struct driver *drv;
	int size = 0;
	int ret;
	int seq;

	if (!dev)
		return -EINVAL;

	if (dev->flags & DM_FLAG_ACTIVATED)
		return 0;

	drv = dev->driver;
	assert(drv);

	/* Allocate private data if requested */
	if (drv->priv_auto_alloc_size) {
		dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
		if (!dev->priv) {
			ret = -ENOMEM;
			goto fail;
		}
	}
	/* Allocate private data if requested */
	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
	if (size) {
		dev->uclass_priv = calloc(1, size);
		if (!dev->uclass_priv) {
			ret = -ENOMEM;
			goto fail;
		}
	}

	/* Ensure all parents are probed */
	if (dev->parent) {
		size = dev->parent->driver->per_child_auto_alloc_size;
		if (!size) {
			size = dev->parent->uclass->uc_drv->
					per_child_auto_alloc_size;
		}
		if (size) {
			dev->parent_priv = alloc_priv(size, drv->flags);
			if (!dev->parent_priv) {
				ret = -ENOMEM;
				goto fail;
			}
			if (parent_priv)
				memcpy(dev->parent_priv, parent_priv, size);
		}

		ret = device_probe(dev->parent);
		if (ret)
			goto fail;
	}

	seq = uclass_resolve_seq(dev);
	if (seq < 0) {
		ret = seq;
		goto fail;
	}
	dev->seq = seq;

	dev->flags |= DM_FLAG_ACTIVATED;

	ret = uclass_pre_probe_device(dev);
	if (ret)
		goto fail;

	if (dev->parent && dev->parent->driver->child_pre_probe) {
		ret = dev->parent->driver->child_pre_probe(dev);
		if (ret)
			goto fail;
	}

	if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
		ret = drv->ofdata_to_platdata(dev);
		if (ret)
			goto fail;
	}

	dev->flags |= DM_FLAG_ACTIVATED;
	if (drv->probe) {
		ret = drv->probe(dev);
		if (ret) {
			dev->flags &= ~DM_FLAG_ACTIVATED;
			goto fail;
		}
	}

	ret = uclass_post_probe_device(dev);
	if (ret)
		goto fail_uclass;

	return 0;
fail_uclass:
	if (device_remove(dev)) {
		dm_warn("%s: Device '%s' failed to remove on error path\n",
			__func__, dev->name);
	}
fail:
	dev->flags &= ~DM_FLAG_ACTIVATED;

	dev->seq = -1;
	device_free(dev);

	return ret;
}

int device_probe(struct udevice *dev)
{
	return device_probe_child(dev, NULL);
}

void *dev_get_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->platdata;
}

void *dev_get_parent_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device", __func__);
		return NULL;
	}

	return dev->parent_platdata;
}

void *dev_get_uclass_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device", __func__);
		return NULL;
	}

	return dev->uclass_platdata;
}

void *dev_get_priv(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->priv;
}

void *dev_get_uclass_priv(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->uclass_priv;
}

void *dev_get_parentdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->parent_priv;
}

static int device_get_device_tail(struct udevice *dev, int ret,
				  struct udevice **devp)
{
	if (ret)
		return ret;

	ret = device_probe(dev);
	if (ret)
		return ret;

	*devp = dev;

	return 0;
}

int device_get_child(struct udevice *parent, int index, struct udevice **devp)
{
	struct udevice *dev;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if (!index--)
			return device_get_device_tail(dev, 0, devp);
	}

	return -ENODEV;
}

int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
			     bool find_req_seq, struct udevice **devp)
{
	struct udevice *dev;

	*devp = NULL;
	if (seq_or_req_seq == -1)
		return -ENODEV;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if ((find_req_seq ? dev->req_seq : dev->seq) ==
				seq_or_req_seq) {
			*devp = dev;
			return 0;
		}
	}

	return -ENODEV;
}

int device_get_child_by_seq(struct udevice *parent, int seq,
			    struct udevice **devp)
{
	struct udevice *dev;
	int ret;

	*devp = NULL;
	ret = device_find_child_by_seq(parent, seq, false, &dev);
	if (ret == -ENODEV) {
		/*
		 * We didn't find it in probed devices. See if there is one
		 * that will request this seq if probed.
		 */
		ret = device_find_child_by_seq(parent, seq, true, &dev);
	}
	return device_get_device_tail(dev, ret, devp);
}

int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
				   struct udevice **devp)
{
	struct udevice *dev;

	*devp = NULL;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if (dev->of_offset == of_offset) {
			*devp = dev;
			return 0;
		}
	}

	return -ENODEV;
}

int device_get_child_by_of_offset(struct udevice *parent, int seq,
				  struct udevice **devp)
{
	struct udevice *dev;
	int ret;

	*devp = NULL;
	ret = device_find_child_by_of_offset(parent, seq, &dev);
	return device_get_device_tail(dev, ret, devp);
}

int device_find_first_child(struct udevice *parent, struct udevice **devp)
{
	if (list_empty(&parent->child_head)) {
		*devp = NULL;
	} else {
		*devp = list_first_entry(&parent->child_head, struct udevice,
					 sibling_node);
	}

	return 0;
}

int device_find_next_child(struct udevice **devp)
{
	struct udevice *dev = *devp;
	struct udevice *parent = dev->parent;

	if (list_is_last(&dev->sibling_node, &parent->child_head)) {
		*devp = NULL;
	} else {
		*devp = list_entry(dev->sibling_node.next, struct udevice,
				   sibling_node);
	}

	return 0;
}

struct udevice *dev_get_parent(struct udevice *child)
{
	return child->parent;
}

ulong dev_get_driver_data(struct udevice *dev)
{
	return dev->driver_data;
}

const void *dev_get_driver_ops(struct udevice *dev)
{
	if (!dev || !dev->driver->ops)
		return NULL;

	return dev->driver->ops;
}

enum uclass_id device_get_uclass_id(struct udevice *dev)
{
	return dev->uclass->uc_drv->id;
}

const char *dev_get_uclass_name(struct udevice *dev)
{
	if (!dev)
		return NULL;

	return dev->uclass->uc_drv->name;
}

#ifdef CONFIG_OF_CONTROL
fdt_addr_t dev_get_addr(struct udevice *dev)
{
	return fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
}
#else
fdt_addr_t dev_get_addr(struct udevice *dev)
{
	return FDT_ADDR_T_NONE;
}
#endif

bool device_has_children(struct udevice *dev)
{
	return !list_empty(&dev->child_head);
}

bool device_has_active_children(struct udevice *dev)
{
	struct udevice *child;

	for (device_find_first_child(dev, &child);
	     child;
	     device_find_next_child(&child)) {
		if (device_active(child))
			return true;
	}

	return false;
}

bool device_is_last_sibling(struct udevice *dev)
{
	struct udevice *parent = dev->parent;

	if (!parent)
		return false;
	return list_is_last(&dev->sibling_node, &parent->child_head);
}
Commit	Line	Data
6494d708 SG	1	/*
	2	* Device manager
	3	*
	4	* Copyright (c) 2013 Google, Inc
	5	*
	6	* (C) Copyright 2012
	7	* Pavel Herrmann <morpheus.ibis@gmail.com>
	8	*
	9	* SPDX-License-Identifier: GPL-2.0+
	10	*/
	11
	12	#include <common.h>
5a66a8ff	13	#include <fdtdec.h>
6494d708 SG	14	#include <malloc.h>
	15	#include <dm/device.h>
	16	#include <dm/device-internal.h>
	17	#include <dm/lists.h>
	18	#include <dm/platdata.h>
	19	#include <dm/uclass.h>
	20	#include <dm/uclass-internal.h>
	21	#include <dm/util.h>
	22	#include <linux/err.h>
	23	#include <linux/list.h>
	24
5a66a8ff SG	25	DECLARE_GLOBAL_DATA_PTR;
5a66a8ff SG	26
3479253d SG	27	int device_bind(struct udevice parent, const struct driver drv,
	28	const char name, void platdata, int of_offset,
	29	struct udevice **devp)
6494d708	30	{
54c5d08a	31	struct udevice *dev;
6494d708	32	struct uclass *uc;
5eaed880	33	int size, ret = 0;
6494d708 SG	34
	35	*devp = NULL;
	36	if (!name)
	37	return -EINVAL;
	38
	39	ret = uclass_get(drv->id, &uc);
	40	if (ret)
	41	return ret;
	42
54c5d08a	43	dev = calloc(1, sizeof(struct udevice));
6494d708 SG	44	if (!dev)
	45	return -ENOMEM;
	46
	47	INIT_LIST_HEAD(&dev->sibling_node);
	48	INIT_LIST_HEAD(&dev->child_head);
	49	INIT_LIST_HEAD(&dev->uclass_node);
	50	dev->platdata = platdata;
	51	dev->name = name;
	52	dev->of_offset = of_offset;
	53	dev->parent = parent;
	54	dev->driver = drv;
	55	dev->uclass = uc;
5a66a8ff	56
5a66a8ff	57	dev->seq = -1;
9cc36a2b	58	dev->req_seq = -1;
91cbd792	59	#ifdef CONFIG_OF_CONTROL
9cc36a2b SG	60	/*
	61	* Some devices, such as a SPI bus, I2C bus and serial ports are
	62	* numbered using aliases.
	63	*
	64	* This is just a 'requested' sequence, and will be
	65	* resolved (and ->seq updated) when the device is probed.
	66	*/
	67	if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
	68	if (uc->uc_drv->name && of_offset != -1) {
	69	fdtdec_get_alias_seq(gd->fdt_blob, uc->uc_drv->name,
	70	of_offset, &dev->req_seq);
	71	}
5a66a8ff	72	}
91cbd792	73	#endif
f8a85449	74	if (!dev->platdata && drv->platdata_auto_alloc_size) {
6494d708	75	dev->flags \|= DM_FLAG_ALLOC_PDATA;
f8a85449 SG	76	dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
	77	if (!dev->platdata) {
	78	ret = -ENOMEM;
	79	goto fail_alloc1;
	80	}
	81	}
cdc133bd	82
5eaed880 PM	83	size = uc->uc_drv->per_device_platdata_auto_alloc_size;
	84	if (size) {
	85	dev->flags \|= DM_FLAG_ALLOC_UCLASS_PDATA;
	86	dev->uclass_platdata = calloc(1, size);
	87	if (!dev->uclass_platdata) {
	88	ret = -ENOMEM;
	89	goto fail_alloc2;
	90	}
	91	}
	92
	93	if (parent) {
	94	size = parent->driver->per_child_platdata_auto_alloc_size;
ba8da9dc SG	95	if (!size) {
	96	size = parent->uclass->uc_drv->
	97	per_child_platdata_auto_alloc_size;
	98	}
cdc133bd SG	99	if (size) {
	100	dev->flags \|= DM_FLAG_ALLOC_PARENT_PDATA;
	101	dev->parent_platdata = calloc(1, size);
	102	if (!dev->parent_platdata) {
	103	ret = -ENOMEM;
5eaed880	104	goto fail_alloc3;
cdc133bd SG	105	}
	106	}
	107	}
6494d708 SG	108
	109	/* put dev into parent's successor list */
	110	if (parent)
	111	list_add_tail(&dev->sibling_node, &parent->child_head);
	112
	113	ret = uclass_bind_device(dev);
	114	if (ret)
72ebfe86	115	goto fail_uclass_bind;
6494d708 SG	116
	117	/* if we fail to bind we remove device from successors and free it */
	118	if (drv->bind) {
	119	ret = drv->bind(dev);
72ebfe86	120	if (ret)
6494d708	121	goto fail_bind;
6494d708	122	}
0118ce79 SG	123	if (parent && parent->driver->child_post_bind) {
	124	ret = parent->driver->child_post_bind(dev);
	125	if (ret)
	126	goto fail_child_post_bind;
	127	}
	128
6494d708 SG	129	if (parent)
	130	dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
	131	*devp = dev;
	132
	133	return 0;
	134
0118ce79 SG	135	fail_child_post_bind:
	136	if (drv->unbind && drv->unbind(dev)) {
	137	dm_warn("unbind() method failed on dev '%s' on error path\n",
	138	dev->name);
	139	}
	140
6494d708	141	fail_bind:
72ebfe86 SG	142	if (uclass_unbind_device(dev)) {
	143	dm_warn("Failed to unbind dev '%s' on error path\n",
	144	dev->name);
	145	}
	146	fail_uclass_bind:
cdc133bd SG	147	list_del(&dev->sibling_node);
	148	if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
	149	free(dev->parent_platdata);
	150	dev->parent_platdata = NULL;
	151	}
5eaed880 PM	152	fail_alloc3:
	153	if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
	154	free(dev->uclass_platdata);
	155	dev->uclass_platdata = NULL;
	156	}
cdc133bd	157	fail_alloc2:
f8a85449 SG	158	if (dev->flags & DM_FLAG_ALLOC_PDATA) {
	159	free(dev->platdata);
	160	dev->platdata = NULL;
	161	}
	162	fail_alloc1:
6494d708	163	free(dev);
72ebfe86	164
6494d708 SG	165	return ret;
	166	}
	167
00606d7e SG	168	int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
00606d7e SG	169	const struct driver_info info, struct udevice *devp)
6494d708 SG	170	{
	171	struct driver *drv;
	172
	173	drv = lists_driver_lookup_name(info->name);
	174	if (!drv)
	175	return -ENOENT;
00606d7e SG	176	if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
00606d7e SG	177	return -EPERM;
6494d708 SG	178
	179	return device_bind(parent, drv, info->name, (void *)info->platdata,
	180	-1, devp);
	181	}
	182
2c03c463 SG	183	static void *alloc_priv(int size, uint flags)
	184	{
	185	void *priv;
	186
	187	if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
	188	priv = memalign(ARCH_DMA_MINALIGN, size);
	189	if (priv)
	190	memset(priv, '\0', size);
	191	} else {
	192	priv = calloc(1, size);
	193	}
	194
	195	return priv;
	196	}
	197
accd4b19	198	int device_probe_child(struct udevice dev, void parent_priv)
6494d708	199	{
3479253d	200	const struct driver *drv;
6494d708 SG	201	int size = 0;
6494d708 SG	202	int ret;
5a66a8ff	203	int seq;
6494d708 SG	204
	205	if (!dev)
	206	return -EINVAL;
	207
	208	if (dev->flags & DM_FLAG_ACTIVATED)
	209	return 0;
	210
	211	drv = dev->driver;
	212	assert(drv);
	213
f8a85449	214	/* Allocate private data if requested */
6494d708	215	if (drv->priv_auto_alloc_size) {
2c03c463	216	dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
6494d708 SG	217	if (!dev->priv) {
	218	ret = -ENOMEM;
	219	goto fail;
	220	}
	221	}
	222	/* Allocate private data if requested */
6494d708 SG	223	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
	224	if (size) {
	225	dev->uclass_priv = calloc(1, size);
	226	if (!dev->uclass_priv) {
	227	ret = -ENOMEM;
	228	goto fail;
	229	}
	230	}
	231
	232	/* Ensure all parents are probed */
	233	if (dev->parent) {
e59f458d	234	size = dev->parent->driver->per_child_auto_alloc_size;
dac8db2c SG	235	if (!size) {
	236	size = dev->parent->uclass->uc_drv->
	237	per_child_auto_alloc_size;
	238	}
e59f458d	239	if (size) {
2c03c463	240	dev->parent_priv = alloc_priv(size, drv->flags);
e59f458d SG	241	if (!dev->parent_priv) {
	242	ret = -ENOMEM;
	243	goto fail;
	244	}
accd4b19 SG	245	if (parent_priv)
accd4b19 SG	246	memcpy(dev->parent_priv, parent_priv, size);
e59f458d SG	247	}
e59f458d SG	248
6494d708 SG	249	ret = device_probe(dev->parent);
	250	if (ret)
	251	goto fail;
	252	}
	253
5a66a8ff SG	254	seq = uclass_resolve_seq(dev);
	255	if (seq < 0) {
	256	ret = seq;
	257	goto fail;
	258	}
	259	dev->seq = seq;
	260
206d4d2b SG	261	dev->flags \|= DM_FLAG_ACTIVATED;
206d4d2b SG	262
02c07b37	263	ret = uclass_pre_probe_device(dev);
83c7e434 SG	264	if (ret)
	265	goto fail;
	266
a327dee0 SG	267	if (dev->parent && dev->parent->driver->child_pre_probe) {
	268	ret = dev->parent->driver->child_pre_probe(dev);
	269	if (ret)
	270	goto fail;
	271	}
	272
6494d708 SG	273	if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
	274	ret = drv->ofdata_to_platdata(dev);
	275	if (ret)
	276	goto fail;
	277	}
	278
02eeb1bb	279	dev->flags \|= DM_FLAG_ACTIVATED;
6494d708 SG	280	if (drv->probe) {
6494d708 SG	281	ret = drv->probe(dev);
02eeb1bb SG	282	if (ret) {
02eeb1bb SG	283	dev->flags &= ~DM_FLAG_ACTIVATED;
6494d708	284	goto fail;
02eeb1bb	285	}
6494d708 SG	286	}
6494d708 SG	287
6494d708	288	ret = uclass_post_probe_device(dev);
206d4d2b	289	if (ret)
6494d708	290	goto fail_uclass;
6494d708 SG	291
	292	return 0;
	293	fail_uclass:
	294	if (device_remove(dev)) {
	295	dm_warn("%s: Device '%s' failed to remove on error path\n",
	296	__func__, dev->name);
	297	}
	298	fail:
206d4d2b SG	299	dev->flags &= ~DM_FLAG_ACTIVATED;
206d4d2b SG	300
5a66a8ff	301	dev->seq = -1;
6494d708 SG	302	device_free(dev);
	303
	304	return ret;
	305	}
	306
accd4b19 SG	307	int device_probe(struct udevice *dev)
	308	{
	309	return device_probe_child(dev, NULL);
	310	}
	311
54c5d08a	312	void dev_get_platdata(struct udevice dev)
6494d708 SG	313	{
6494d708 SG	314	if (!dev) {
964d153c	315	dm_warn("%s: null device\n", __func__);
6494d708 SG	316	return NULL;
	317	}
	318
	319	return dev->platdata;
	320	}
	321
cdc133bd SG	322	void dev_get_parent_platdata(struct udevice dev)
	323	{
	324	if (!dev) {
	325	dm_warn("%s: null device", __func__);
	326	return NULL;
	327	}
	328
	329	return dev->parent_platdata;
	330	}
	331
5eaed880 PM	332	void dev_get_uclass_platdata(struct udevice dev)
	333	{
	334	if (!dev) {
	335	dm_warn("%s: null device", __func__);
	336	return NULL;
	337	}
	338
	339	return dev->uclass_platdata;
	340	}
	341
54c5d08a	342	void dev_get_priv(struct udevice dev)
6494d708 SG	343	{
6494d708 SG	344	if (!dev) {
964d153c	345	dm_warn("%s: null device\n", __func__);
6494d708 SG	346	return NULL;
	347	}
	348
	349	return dev->priv;
	350	}
997c87bb	351
e564f054 SG	352	void dev_get_uclass_priv(struct udevice dev)
	353	{
	354	if (!dev) {
	355	dm_warn("%s: null device\n", __func__);
	356	return NULL;
	357	}
	358
	359	return dev->uclass_priv;
	360	}
	361
e59f458d SG	362	void dev_get_parentdata(struct udevice dev)
	363	{
	364	if (!dev) {
964d153c	365	dm_warn("%s: null device\n", __func__);
e59f458d SG	366	return NULL;
	367	}
	368
	369	return dev->parent_priv;
	370	}
	371
997c87bb SG	372	static int device_get_device_tail(struct udevice *dev, int ret,
	373	struct udevice **devp)
	374	{
	375	if (ret)
	376	return ret;
	377
	378	ret = device_probe(dev);
	379	if (ret)
	380	return ret;
	381
	382	*devp = dev;
	383
	384	return 0;
	385	}
	386
	387	int device_get_child(struct udevice parent, int index, struct udevice *devp)
	388	{
	389	struct udevice *dev;
	390
	391	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	392	if (!index--)
	393	return device_get_device_tail(dev, 0, devp);
	394	}
	395
	396	return -ENODEV;
	397	}
	398
	399	int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
	400	bool find_req_seq, struct udevice **devp)
	401	{
	402	struct udevice *dev;
	403
	404	*devp = NULL;
	405	if (seq_or_req_seq == -1)
	406	return -ENODEV;
	407
	408	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	409	if ((find_req_seq ? dev->req_seq : dev->seq) ==
	410	seq_or_req_seq) {
	411	*devp = dev;
	412	return 0;
	413	}
	414	}
	415
	416	return -ENODEV;
	417	}
	418
	419	int device_get_child_by_seq(struct udevice *parent, int seq,
	420	struct udevice **devp)
	421	{
	422	struct udevice *dev;
	423	int ret;
	424
	425	*devp = NULL;
	426	ret = device_find_child_by_seq(parent, seq, false, &dev);
	427	if (ret == -ENODEV) {
	428	/*
	429	* We didn't find it in probed devices. See if there is one
	430	* that will request this seq if probed.
	431	*/
	432	ret = device_find_child_by_seq(parent, seq, true, &dev);
	433	}
	434	return device_get_device_tail(dev, ret, devp);
	435	}
436
437	int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
438	struct udevice **devp)
439	{
440	struct udevice *dev;
441
442	*devp = NULL;
443
444	list_for_each_entry(dev, &parent->child_head, sibling_node) {
445	if (dev->of_offset == of_offset) {
446	*devp = dev;
447	return 0;
448	}
449	}
450
451	return -ENODEV;
452	}
453
454	int device_get_child_by_of_offset(struct udevice *parent, int seq,
455	struct udevice **devp)
456	{
457	struct udevice *dev;
458	int ret;
459
460	*devp = NULL;
461	ret = device_find_child_by_of_offset(parent, seq, &dev);
462	return device_get_device_tail(dev, ret, devp);
463	}
a8981d4f SG	464
	465	int device_find_first_child(struct udevice parent, struct udevice *devp)
	466	{
	467	if (list_empty(&parent->child_head)) {
	468	*devp = NULL;
	469	} else {
	470	*devp = list_first_entry(&parent->child_head, struct udevice,
	471	sibling_node);
	472	}
	473
	474	return 0;
	475	}
	476
	477	int device_find_next_child(struct udevice **devp)
	478	{
	479	struct udevice dev = devp;
	480	struct udevice *parent = dev->parent;
	481
	482	if (list_is_last(&dev->sibling_node, &parent->child_head)) {
	483	*devp = NULL;
	484	} else {
	485	*devp = list_entry(dev->sibling_node.next, struct udevice,
	486	sibling_node);
	487	}
	488
	489	return 0;
	490	}
2ef249b4	491
479728cb SG	492	struct udevice dev_get_parent(struct udevice child)
	493	{
	494	return child->parent;
	495	}
	496
39de8433	497	ulong dev_get_driver_data(struct udevice *dev)
2ef249b4	498	{
39de8433	499	return dev->driver_data;
2ef249b4	500	}
b3670531	501
cc73d37b PM	502	const void dev_get_driver_ops(struct udevice dev)
	503	{
	504	if (!dev \|\| !dev->driver->ops)
	505	return NULL;
	506
	507	return dev->driver->ops;
	508	}
	509
b3670531 SG	510	enum uclass_id device_get_uclass_id(struct udevice *dev)
	511	{
	512	return dev->uclass->uc_drv->id;
	513	}
c9cac3f8	514
f9c370dc PM	515	const char dev_get_uclass_name(struct udevice dev)
	516	{
	517	if (!dev)
	518	return NULL;
	519
	520	return dev->uclass->uc_drv->name;
	521	}
	522
c9cac3f8 PF	523	#ifdef CONFIG_OF_CONTROL
	524	fdt_addr_t dev_get_addr(struct udevice *dev)
	525	{
	526	return fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
	527	}
	528	#else
	529	fdt_addr_t dev_get_addr(struct udevice *dev)
	530	{
	531	return FDT_ADDR_T_NONE;
	532	}
	533	#endif
c5785673 SG	534
	535	bool device_has_children(struct udevice *dev)
	536	{
	537	return !list_empty(&dev->child_head);
	538	}
	539
	540	bool device_has_active_children(struct udevice *dev)
	541	{
	542	struct udevice *child;
	543
	544	for (device_find_first_child(dev, &child);
	545	child;
	546	device_find_next_child(&child)) {
	547	if (device_active(child))
	548	return true;
	549	}
	550
	551	return false;
	552	}
	553
	554	bool device_is_last_sibling(struct udevice *dev)
	555	{
	556	struct udevice *parent = dev->parent;
	557
	558	if (!parent)
	559	return false;
	560	return list_is_last(&dev->sibling_node, &parent->child_head);
	561	}