1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2aa613de6SDmitry Baryshkov /*
3aa613de6SDmitry Baryshkov * drivers/mfd/mfd-core.c
4aa613de6SDmitry Baryshkov *
5aa613de6SDmitry Baryshkov * core MFD support
6aa613de6SDmitry Baryshkov * Copyright (c) 2006 Ian Molton
7aa613de6SDmitry Baryshkov * Copyright (c) 2007,2008 Dmitry Baryshkov
8aa613de6SDmitry Baryshkov */
9aa613de6SDmitry Baryshkov
10aa613de6SDmitry Baryshkov #include <linux/kernel.h>
11aa613de6SDmitry Baryshkov #include <linux/platform_device.h>
1291fededeSSamuel Ortiz #include <linux/acpi.h>
13466a62d7SLee Jones #include <linux/list.h>
144d215cabSAndy Shevchenko #include <linux/property.h>
15aa613de6SDmitry Baryshkov #include <linux/mfd/core.h>
164c90aa94SMark Brown #include <linux/pm_runtime.h>
175a0e3ad6STejun Heo #include <linux/slab.h>
184e36dd33SPaul Gortmaker #include <linux/module.h>
19c94bb233SLee Jones #include <linux/irqdomain.h>
20c94bb233SLee Jones #include <linux/of.h>
21466a62d7SLee Jones #include <linux/of_address.h>
227fcd4274SCharles Keepax #include <linux/regulator/consumer.h>
23aa613de6SDmitry Baryshkov
24466a62d7SLee Jones static LIST_HEAD(mfd_of_node_list);
25466a62d7SLee Jones
26466a62d7SLee Jones struct mfd_of_node_entry {
27466a62d7SLee Jones struct list_head list;
28466a62d7SLee Jones struct device *dev;
29466a62d7SLee Jones struct device_node *np;
30466a62d7SLee Jones };
31466a62d7SLee Jones
32b9fbb62eSCharles Keepax static struct device_type mfd_dev_type = {
33b9fbb62eSCharles Keepax .name = "mfd_device",
34b9fbb62eSCharles Keepax };
35b9fbb62eSCharles Keepax
366ab34301SMika Westerberg #if IS_ENABLED(CONFIG_ACPI)
370c9b9c2aSRafael J. Wysocki struct match_ids_walk_data {
380c9b9c2aSRafael J. Wysocki struct acpi_device_id *ids;
390c9b9c2aSRafael J. Wysocki struct acpi_device *adev;
400c9b9c2aSRafael J. Wysocki };
410c9b9c2aSRafael J. Wysocki
match_device_ids(struct acpi_device * adev,void * data)420c9b9c2aSRafael J. Wysocki static int match_device_ids(struct acpi_device *adev, void *data)
430c9b9c2aSRafael J. Wysocki {
440c9b9c2aSRafael J. Wysocki struct match_ids_walk_data *wd = data;
450c9b9c2aSRafael J. Wysocki
460c9b9c2aSRafael J. Wysocki if (!acpi_match_device_ids(adev, wd->ids)) {
470c9b9c2aSRafael J. Wysocki wd->adev = adev;
480c9b9c2aSRafael J. Wysocki return 1;
490c9b9c2aSRafael J. Wysocki }
500c9b9c2aSRafael J. Wysocki
510c9b9c2aSRafael J. Wysocki return 0;
520c9b9c2aSRafael J. Wysocki }
530c9b9c2aSRafael J. Wysocki
mfd_acpi_add_device(const struct mfd_cell * cell,struct platform_device * pdev)546ab34301SMika Westerberg static void mfd_acpi_add_device(const struct mfd_cell *cell,
556ab34301SMika Westerberg struct platform_device *pdev)
566ab34301SMika Westerberg {
5798a3be44SAndy Shevchenko const struct mfd_cell_acpi_match *match = cell->acpi_match;
5840cb71f3SAndy Shevchenko struct acpi_device *adev = NULL;
590c9b9c2aSRafael J. Wysocki struct acpi_device *parent;
606ab34301SMika Westerberg
6198a3be44SAndy Shevchenko parent = ACPI_COMPANION(pdev->dev.parent);
6298a3be44SAndy Shevchenko if (!parent)
636ab34301SMika Westerberg return;
646ab34301SMika Westerberg
656ab34301SMika Westerberg /*
6698a3be44SAndy Shevchenko * MFD child device gets its ACPI handle either from the ACPI device
6798a3be44SAndy Shevchenko * directly under the parent that matches the either _HID or _CID, or
6898a3be44SAndy Shevchenko * _ADR or it will use the parent handle if is no ID is given.
6998a3be44SAndy Shevchenko *
7098a3be44SAndy Shevchenko * Note that use of _ADR is a grey area in the ACPI specification,
7140cb71f3SAndy Shevchenko * though at least Intel Galileo Gen 2 is using it to distinguish
7240cb71f3SAndy Shevchenko * the children devices.
736ab34301SMika Westerberg */
7498a3be44SAndy Shevchenko if (match) {
7598a3be44SAndy Shevchenko if (match->pnpid) {
766ab34301SMika Westerberg struct acpi_device_id ids[2] = {};
770c9b9c2aSRafael J. Wysocki struct match_ids_walk_data wd = {
780c9b9c2aSRafael J. Wysocki .adev = NULL,
790c9b9c2aSRafael J. Wysocki .ids = ids,
800c9b9c2aSRafael J. Wysocki };
816ab34301SMika Westerberg
826a32d399SWolfram Sang strscpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
830c9b9c2aSRafael J. Wysocki acpi_dev_for_each_child(parent, match_device_ids, &wd);
840c9b9c2aSRafael J. Wysocki adev = wd.adev;
8598a3be44SAndy Shevchenko } else {
8640cb71f3SAndy Shevchenko adev = acpi_find_child_device(parent, match->adr, false);
8798a3be44SAndy Shevchenko }
8898a3be44SAndy Shevchenko }
896ab34301SMika Westerberg
9040cb71f3SAndy Shevchenko ACPI_COMPANION_SET(&pdev->dev, adev ?: parent);
916ab34301SMika Westerberg }
926ab34301SMika Westerberg #else
mfd_acpi_add_device(const struct mfd_cell * cell,struct platform_device * pdev)936ab34301SMika Westerberg static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
946ab34301SMika Westerberg struct platform_device *pdev)
956ab34301SMika Westerberg {
966ab34301SMika Westerberg }
976ab34301SMika Westerberg #endif
986ab34301SMika Westerberg
mfd_match_of_node_to_dev(struct platform_device * pdev,struct device_node * np,const struct mfd_cell * cell)99466a62d7SLee Jones static int mfd_match_of_node_to_dev(struct platform_device *pdev,
100466a62d7SLee Jones struct device_node *np,
101466a62d7SLee Jones const struct mfd_cell *cell)
102466a62d7SLee Jones {
103466a62d7SLee Jones #if IS_ENABLED(CONFIG_OF)
104466a62d7SLee Jones struct mfd_of_node_entry *of_entry;
105466a62d7SLee Jones u64 of_node_addr;
106466a62d7SLee Jones
107466a62d7SLee Jones /* Skip if OF node has previously been allocated to a device */
108466a62d7SLee Jones list_for_each_entry(of_entry, &mfd_of_node_list, list)
109466a62d7SLee Jones if (of_entry->np == np)
110466a62d7SLee Jones return -EAGAIN;
111466a62d7SLee Jones
112466a62d7SLee Jones if (!cell->use_of_reg)
113466a62d7SLee Jones /* No of_reg defined - allocate first free compatible match */
114466a62d7SLee Jones goto allocate_of_node;
115466a62d7SLee Jones
116466a62d7SLee Jones /* We only care about each node's first defined address */
117c7fe3bbfSRob Herring if (of_property_read_reg(np, 0, &of_node_addr, NULL))
118466a62d7SLee Jones /* OF node does not contatin a 'reg' property to match to */
119466a62d7SLee Jones return -EAGAIN;
120466a62d7SLee Jones
121466a62d7SLee Jones if (cell->of_reg != of_node_addr)
122466a62d7SLee Jones /* No match */
123466a62d7SLee Jones return -EAGAIN;
124466a62d7SLee Jones
125466a62d7SLee Jones allocate_of_node:
126466a62d7SLee Jones of_entry = kzalloc(sizeof(*of_entry), GFP_KERNEL);
127466a62d7SLee Jones if (!of_entry)
128466a62d7SLee Jones return -ENOMEM;
129466a62d7SLee Jones
130466a62d7SLee Jones of_entry->dev = &pdev->dev;
131466a62d7SLee Jones of_entry->np = np;
132466a62d7SLee Jones list_add_tail(&of_entry->list, &mfd_of_node_list);
133466a62d7SLee Jones
134466a62d7SLee Jones pdev->dev.of_node = np;
135466a62d7SLee Jones pdev->dev.fwnode = &np->fwnode;
136466a62d7SLee Jones #endif
137466a62d7SLee Jones return 0;
138466a62d7SLee Jones }
139466a62d7SLee Jones
mfd_add_device(struct device * parent,int id,const struct mfd_cell * cell,struct resource * mem_base,int irq_base,struct irq_domain * domain)140424f525aSDmitry Baryshkov static int mfd_add_device(struct device *parent, int id,
1415a47c0fbSLee Jones const struct mfd_cell *cell,
142aa613de6SDmitry Baryshkov struct resource *mem_base,
1430848c94fSMark Brown int irq_base, struct irq_domain *domain)
144aa613de6SDmitry Baryshkov {
145a87903f3SIan Molton struct resource *res;
146aa613de6SDmitry Baryshkov struct platform_device *pdev;
147c94bb233SLee Jones struct device_node *np = NULL;
148466a62d7SLee Jones struct mfd_of_node_entry *of_entry, *tmp;
149*82fa83fbSHerve Codina bool disabled = false;
150aa613de6SDmitry Baryshkov int ret = -ENOMEM;
1516e3f62f0SJohan Hovold int platform_id;
152aa613de6SDmitry Baryshkov int r;
153aa613de6SDmitry Baryshkov
154a77c50b4SJohan Hovold if (id == PLATFORM_DEVID_AUTO)
1556e3f62f0SJohan Hovold platform_id = id;
1566e3f62f0SJohan Hovold else
1576e3f62f0SJohan Hovold platform_id = id + cell->id;
1586e3f62f0SJohan Hovold
1596e3f62f0SJohan Hovold pdev = platform_device_alloc(cell->name, platform_id);
160aa613de6SDmitry Baryshkov if (!pdev)
161aa613de6SDmitry Baryshkov goto fail_alloc;
162aa613de6SDmitry Baryshkov
163b944a688SLee Jones pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
164b944a688SLee Jones if (!pdev->mfd_cell)
165b944a688SLee Jones goto fail_device;
166b944a688SLee Jones
1676396bb22SKees Cook res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
168a87903f3SIan Molton if (!res)
169a87903f3SIan Molton goto fail_device;
170a87903f3SIan Molton
171424f525aSDmitry Baryshkov pdev->dev.parent = parent;
172b9fbb62eSCharles Keepax pdev->dev.type = &mfd_dev_type;
173b018e136SBenedikt Spranger pdev->dev.dma_mask = parent->dma_mask;
174b018e136SBenedikt Spranger pdev->dev.dma_parms = parent->dma_parms;
1754f08df1bSBoris BREZILLON pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;
176aa613de6SDmitry Baryshkov
177d137be00SCharles Keepax ret = regulator_bulk_register_supply_alias(
1787fcd4274SCharles Keepax &pdev->dev, cell->parent_supplies,
1797fcd4274SCharles Keepax parent, cell->parent_supplies,
1807fcd4274SCharles Keepax cell->num_parent_supplies);
1817fcd4274SCharles Keepax if (ret < 0)
1827fcd4274SCharles Keepax goto fail_res;
1837fcd4274SCharles Keepax
184466a62d7SLee Jones if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
185c94bb233SLee Jones for_each_child_of_node(parent->of_node, np) {
186c94bb233SLee Jones if (of_device_is_compatible(np, cell->of_compatible)) {
187*82fa83fbSHerve Codina /* Skip 'disabled' devices */
18822380b65SLee Jones if (!of_device_is_available(np)) {
189*82fa83fbSHerve Codina disabled = true;
190*82fa83fbSHerve Codina continue;
19122380b65SLee Jones }
19222380b65SLee Jones
193466a62d7SLee Jones ret = mfd_match_of_node_to_dev(pdev, np, cell);
194466a62d7SLee Jones if (ret == -EAGAIN)
195466a62d7SLee Jones continue;
196002be811SKrzysztof Kozlowski of_node_put(np);
197466a62d7SLee Jones if (ret)
1986b5c3506SLee Jones goto fail_alias;
199466a62d7SLee Jones
200*82fa83fbSHerve Codina goto match;
201c94bb233SLee Jones }
202c94bb233SLee Jones }
203466a62d7SLee Jones
204*82fa83fbSHerve Codina if (disabled) {
205*82fa83fbSHerve Codina /* Ignore 'disabled' devices error free */
206*82fa83fbSHerve Codina ret = 0;
207*82fa83fbSHerve Codina goto fail_alias;
208*82fa83fbSHerve Codina }
209*82fa83fbSHerve Codina
210*82fa83fbSHerve Codina match:
211466a62d7SLee Jones if (!pdev->dev.of_node)
212466a62d7SLee Jones pr_warn("%s: Failed to locate of_node [id: %d]\n",
213466a62d7SLee Jones cell->name, platform_id);
214c94bb233SLee Jones }
215c94bb233SLee Jones
2166ab34301SMika Westerberg mfd_acpi_add_device(cell, pdev);
2176ab34301SMika Westerberg
218eb895607SSamuel Ortiz if (cell->pdata_size) {
219eb895607SSamuel Ortiz ret = platform_device_add_data(pdev,
220eb895607SSamuel Ortiz cell->platform_data, cell->pdata_size);
221eb895607SSamuel Ortiz if (ret)
222466a62d7SLee Jones goto fail_of_entry;
223eb895607SSamuel Ortiz }
224eb895607SSamuel Ortiz
22542e59982SHeikki Krogerus if (cell->swnode) {
22642e59982SHeikki Krogerus ret = device_add_software_node(&pdev->dev, cell->swnode);
22742e59982SHeikki Krogerus if (ret)
22842e59982SHeikki Krogerus goto fail_of_entry;
22942e59982SHeikki Krogerus }
23042e59982SHeikki Krogerus
231aa613de6SDmitry Baryshkov for (r = 0; r < cell->num_resources; r++) {
232aa613de6SDmitry Baryshkov res[r].name = cell->resources[r].name;
233aa613de6SDmitry Baryshkov res[r].flags = cell->resources[r].flags;
234aa613de6SDmitry Baryshkov
235aa613de6SDmitry Baryshkov /* Find out base to use */
236f03cfcbcSSamuel Ortiz if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
237aa613de6SDmitry Baryshkov res[r].parent = mem_base;
238aa613de6SDmitry Baryshkov res[r].start = mem_base->start +
239aa613de6SDmitry Baryshkov cell->resources[r].start;
240aa613de6SDmitry Baryshkov res[r].end = mem_base->start +
241aa613de6SDmitry Baryshkov cell->resources[r].end;
242aa613de6SDmitry Baryshkov } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
243c94bb233SLee Jones if (domain) {
244c94bb233SLee Jones /* Unable to create mappings for IRQ ranges. */
245c94bb233SLee Jones WARN_ON(cell->resources[r].start !=
246c94bb233SLee Jones cell->resources[r].end);
247c94bb233SLee Jones res[r].start = res[r].end = irq_create_mapping(
248c94bb233SLee Jones domain, cell->resources[r].start);
249c94bb233SLee Jones } else {
250aa613de6SDmitry Baryshkov res[r].start = irq_base +
251aa613de6SDmitry Baryshkov cell->resources[r].start;
252aa613de6SDmitry Baryshkov res[r].end = irq_base +
253aa613de6SDmitry Baryshkov cell->resources[r].end;
254c94bb233SLee Jones }
255aa613de6SDmitry Baryshkov } else {
256aa613de6SDmitry Baryshkov res[r].parent = cell->resources[r].parent;
257aa613de6SDmitry Baryshkov res[r].start = cell->resources[r].start;
258aa613de6SDmitry Baryshkov res[r].end = cell->resources[r].end;
259aa613de6SDmitry Baryshkov }
26091fededeSSamuel Ortiz
2615f2545faSDaniel Drake if (!cell->ignore_resource_conflicts) {
262ec40c606SLorenzo Pieralisi if (has_acpi_companion(&pdev->dev)) {
263855cc454SJean Delvare ret = acpi_check_resource_conflict(&res[r]);
26491fededeSSamuel Ortiz if (ret)
2655a23e8b0SAndy Shevchenko goto fail_res_conflict;
266aa613de6SDmitry Baryshkov }
2675f2545faSDaniel Drake }
268ec40c606SLorenzo Pieralisi }
269aa613de6SDmitry Baryshkov
2708af5fe3bSAxel Lin ret = platform_device_add_resources(pdev, res, cell->num_resources);
2718af5fe3bSAxel Lin if (ret)
2725a23e8b0SAndy Shevchenko goto fail_res_conflict;
273aa613de6SDmitry Baryshkov
274aa613de6SDmitry Baryshkov ret = platform_device_add(pdev);
275aa613de6SDmitry Baryshkov if (ret)
2765a23e8b0SAndy Shevchenko goto fail_res_conflict;
277a87903f3SIan Molton
2784c90aa94SMark Brown if (cell->pm_runtime_no_callbacks)
2794c90aa94SMark Brown pm_runtime_no_callbacks(&pdev->dev);
2804c90aa94SMark Brown
281a87903f3SIan Molton kfree(res);
282aa613de6SDmitry Baryshkov
283aa613de6SDmitry Baryshkov return 0;
284aa613de6SDmitry Baryshkov
2855a23e8b0SAndy Shevchenko fail_res_conflict:
2865a23e8b0SAndy Shevchenko if (cell->swnode)
2875a23e8b0SAndy Shevchenko device_remove_software_node(&pdev->dev);
288466a62d7SLee Jones fail_of_entry:
289466a62d7SLee Jones list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
290466a62d7SLee Jones if (of_entry->dev == &pdev->dev) {
291466a62d7SLee Jones list_del(&of_entry->list);
292466a62d7SLee Jones kfree(of_entry);
293466a62d7SLee Jones }
2947fcd4274SCharles Keepax fail_alias:
295d137be00SCharles Keepax regulator_bulk_unregister_supply_alias(&pdev->dev,
2967fcd4274SCharles Keepax cell->parent_supplies,
2977fcd4274SCharles Keepax cell->num_parent_supplies);
298a87903f3SIan Molton fail_res:
299a87903f3SIan Molton kfree(res);
300aa613de6SDmitry Baryshkov fail_device:
301aa613de6SDmitry Baryshkov platform_device_put(pdev);
302aa613de6SDmitry Baryshkov fail_alloc:
303aa613de6SDmitry Baryshkov return ret;
304aa613de6SDmitry Baryshkov }
305aa613de6SDmitry Baryshkov
3061946f996SBartosz Golaszewski /**
3071946f996SBartosz Golaszewski * mfd_add_devices - register child devices
3081946f996SBartosz Golaszewski *
3091946f996SBartosz Golaszewski * @parent: Pointer to parent device.
3101946f996SBartosz Golaszewski * @id: Can be PLATFORM_DEVID_AUTO to let the Platform API take care
3111946f996SBartosz Golaszewski * of device numbering, or will be added to a device's cell_id.
3121946f996SBartosz Golaszewski * @cells: Array of (struct mfd_cell)s describing child devices.
3131946f996SBartosz Golaszewski * @n_devs: Number of child devices to register.
3141946f996SBartosz Golaszewski * @mem_base: Parent register range resource for child devices.
3151946f996SBartosz Golaszewski * @irq_base: Base of the range of virtual interrupt numbers allocated for
3161946f996SBartosz Golaszewski * this MFD device. Unused if @domain is specified.
3171946f996SBartosz Golaszewski * @domain: Interrupt domain to create mappings for hardware interrupts.
3181946f996SBartosz Golaszewski */
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)319424f525aSDmitry Baryshkov int mfd_add_devices(struct device *parent, int id,
32003e361b2SGeert Uytterhoeven const struct mfd_cell *cells, int n_devs,
321aa613de6SDmitry Baryshkov struct resource *mem_base,
3220848c94fSMark Brown int irq_base, struct irq_domain *domain)
323aa613de6SDmitry Baryshkov {
324aa613de6SDmitry Baryshkov int i;
3250b208e41SGeert Uytterhoeven int ret;
326aa613de6SDmitry Baryshkov
327aa613de6SDmitry Baryshkov for (i = 0; i < n_devs; i++) {
3285a47c0fbSLee Jones ret = mfd_add_device(parent, id, cells + i, mem_base,
3290848c94fSMark Brown irq_base, domain);
330aa613de6SDmitry Baryshkov if (ret)
3310b208e41SGeert Uytterhoeven goto fail;
332aa613de6SDmitry Baryshkov }
333aa613de6SDmitry Baryshkov
3340b208e41SGeert Uytterhoeven return 0;
335aa613de6SDmitry Baryshkov
3360b208e41SGeert Uytterhoeven fail:
3370b208e41SGeert Uytterhoeven if (i)
3380b208e41SGeert Uytterhoeven mfd_remove_devices(parent);
3395a47c0fbSLee Jones
340aa613de6SDmitry Baryshkov return ret;
341aa613de6SDmitry Baryshkov }
342aa613de6SDmitry Baryshkov EXPORT_SYMBOL(mfd_add_devices);
343aa613de6SDmitry Baryshkov
mfd_remove_devices_fn(struct device * dev,void * data)3445a47c0fbSLee Jones static int mfd_remove_devices_fn(struct device *dev, void *data)
345aa613de6SDmitry Baryshkov {
346b9fbb62eSCharles Keepax struct platform_device *pdev;
347b9fbb62eSCharles Keepax const struct mfd_cell *cell;
3488e88c61dSMichal Oleszczyk struct mfd_of_node_entry *of_entry, *tmp;
349114294d2SCharles Keepax int *level = data;
3501e29af62SAndres Salomon
351b9fbb62eSCharles Keepax if (dev->type != &mfd_dev_type)
352b9fbb62eSCharles Keepax return 0;
353b9fbb62eSCharles Keepax
354b9fbb62eSCharles Keepax pdev = to_platform_device(dev);
355b9fbb62eSCharles Keepax cell = mfd_get_cell(pdev);
356b9fbb62eSCharles Keepax
357114294d2SCharles Keepax if (level && cell->level > *level)
358114294d2SCharles Keepax return 0;
359114294d2SCharles Keepax
3605a23e8b0SAndy Shevchenko if (cell->swnode)
3615a23e8b0SAndy Shevchenko device_remove_software_node(&pdev->dev);
3625a23e8b0SAndy Shevchenko
3638e88c61dSMichal Oleszczyk list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
3648e88c61dSMichal Oleszczyk if (of_entry->dev == &pdev->dev) {
3658e88c61dSMichal Oleszczyk list_del(&of_entry->list);
3668e88c61dSMichal Oleszczyk kfree(of_entry);
3678e88c61dSMichal Oleszczyk }
3688e88c61dSMichal Oleszczyk
369d137be00SCharles Keepax regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
370d137be00SCharles Keepax cell->num_parent_supplies);
371d137be00SCharles Keepax
3721e29af62SAndres Salomon platform_device_unregister(pdev);
373aa613de6SDmitry Baryshkov return 0;
374aa613de6SDmitry Baryshkov }
375aa613de6SDmitry Baryshkov
mfd_remove_devices_late(struct device * parent)376114294d2SCharles Keepax void mfd_remove_devices_late(struct device *parent)
377114294d2SCharles Keepax {
378114294d2SCharles Keepax int level = MFD_DEP_LEVEL_HIGH;
379114294d2SCharles Keepax
380114294d2SCharles Keepax device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
381114294d2SCharles Keepax }
382114294d2SCharles Keepax EXPORT_SYMBOL(mfd_remove_devices_late);
383114294d2SCharles Keepax
mfd_remove_devices(struct device * parent)384424f525aSDmitry Baryshkov void mfd_remove_devices(struct device *parent)
385aa613de6SDmitry Baryshkov {
386114294d2SCharles Keepax int level = MFD_DEP_LEVEL_NORMAL;
387114294d2SCharles Keepax
388114294d2SCharles Keepax device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
389aa613de6SDmitry Baryshkov }
390aa613de6SDmitry Baryshkov EXPORT_SYMBOL(mfd_remove_devices);
391aa613de6SDmitry Baryshkov
devm_mfd_dev_release(struct device * dev,void * res)392a8f447beSLaxman Dewangan static void devm_mfd_dev_release(struct device *dev, void *res)
393a8f447beSLaxman Dewangan {
394a8f447beSLaxman Dewangan mfd_remove_devices(dev);
395a8f447beSLaxman Dewangan }
396a8f447beSLaxman Dewangan
397a8f447beSLaxman Dewangan /**
398a8f447beSLaxman Dewangan * devm_mfd_add_devices - Resource managed version of mfd_add_devices()
399a8f447beSLaxman Dewangan *
400a8f447beSLaxman Dewangan * Returns 0 on success or an appropriate negative error number on failure.
401a8f447beSLaxman Dewangan * All child-devices of the MFD will automatically be removed when it gets
402a8f447beSLaxman Dewangan * unbinded.
4035a0ffef8SLee Jones *
4045a0ffef8SLee Jones * @dev: Pointer to parent device.
4055a0ffef8SLee Jones * @id: Can be PLATFORM_DEVID_AUTO to let the Platform API take care
4065a0ffef8SLee Jones * of device numbering, or will be added to a device's cell_id.
4075a0ffef8SLee Jones * @cells: Array of (struct mfd_cell)s describing child devices.
4085a0ffef8SLee Jones * @n_devs: Number of child devices to register.
4095a0ffef8SLee Jones * @mem_base: Parent register range resource for child devices.
4105a0ffef8SLee Jones * @irq_base: Base of the range of virtual interrupt numbers allocated for
4115a0ffef8SLee Jones * this MFD device. Unused if @domain is specified.
4125a0ffef8SLee Jones * @domain: Interrupt domain to create mappings for hardware interrupts.
413a8f447beSLaxman Dewangan */
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)414a8f447beSLaxman Dewangan int devm_mfd_add_devices(struct device *dev, int id,
415a8f447beSLaxman Dewangan const struct mfd_cell *cells, int n_devs,
416a8f447beSLaxman Dewangan struct resource *mem_base,
417a8f447beSLaxman Dewangan int irq_base, struct irq_domain *domain)
418a8f447beSLaxman Dewangan {
419a8f447beSLaxman Dewangan struct device **ptr;
420a8f447beSLaxman Dewangan int ret;
421a8f447beSLaxman Dewangan
422a8f447beSLaxman Dewangan ptr = devres_alloc(devm_mfd_dev_release, sizeof(*ptr), GFP_KERNEL);
423a8f447beSLaxman Dewangan if (!ptr)
424a8f447beSLaxman Dewangan return -ENOMEM;
425a8f447beSLaxman Dewangan
426a8f447beSLaxman Dewangan ret = mfd_add_devices(dev, id, cells, n_devs, mem_base,
427a8f447beSLaxman Dewangan irq_base, domain);
428a8f447beSLaxman Dewangan if (ret < 0) {
429a8f447beSLaxman Dewangan devres_free(ptr);
430a8f447beSLaxman Dewangan return ret;
431a8f447beSLaxman Dewangan }
432a8f447beSLaxman Dewangan
433a8f447beSLaxman Dewangan *ptr = dev;
434a8f447beSLaxman Dewangan devres_add(dev, ptr);
435a8f447beSLaxman Dewangan
436a8f447beSLaxman Dewangan return ret;
437a8f447beSLaxman Dewangan }
438a8f447beSLaxman Dewangan EXPORT_SYMBOL(devm_mfd_add_devices);
439a8f447beSLaxman Dewangan
440aa613de6SDmitry Baryshkov MODULE_LICENSE("GPL");
441aa613de6SDmitry Baryshkov MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");
442