1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315131613171318131913201321132213231324132513261327132813291330133113321333133413351336133713381339134013411342134313441345134613471348134913501351135213531354135513561357135813591360136113621363136413651366136713681369137013711372137313741375137613771378137913801381138213831384138513861387138813891390139113921393139413951396139713981399140014011402140314041405140614071408140914101411141214131414141514161417141814191420142114221423142414251426142714281429143014311432143314341435143614371438143914401441144214431444144514461447144814491450145114521453145414551456145714581459146014611462146314641465146614671468146914701471147214731474147514761477147814791480148114821483148414851486148714881489149014911492149314941495149614971498149915001501150215031504150515061507150815091510151115121513151415151516151715181519152015211522152315241525152615271528152915301531153215331534153515361537153815391540154115421543154415451546154715481549155015511552155315541555155615571558155915601561156215631564156515661567156815691570157115721573157415751576157715781579158015811582158315841585158615871588158915901591159215931594159515961597159815991600160116021603160416051606160716081609161016111612161316141615161616171618161916201621162216231624162516261627162816291630163116321633163416351636163716381639164016411642164316441645164616471648164916501651165216531654165516561657165816591660166116621663166416651666166716681669167016711672167316741675167616771678167916801681168216831684168516861687168816891690169116921693169416951696169716981699170017011702170317041705170617071708170917101711171217131714171517161717171817191720172117221723172417251726172717281729173017311732173317341735173617371738173917401741174217431744174517461747174817491750175117521753175417551756175717581759176017611762176317641765176617671768176917701771177217731774177517761777177817791780178117821783178417851786178717881789179017911792179317941795179617971798179918001801180218031804180518061807180818091810181118121813181418151816181718181819182018211822182318241825182618271828182918301831183218331834183518361837183818391840184118421843184418451846184718481849185018511852185318541855185618571858185918601861186218631864186518661867186818691870187118721873187418751876187718781879188018811882188318841885188618871888188918901891189218931894189518961897189818991900190119021903190419051906190719081909191019111912191319141915191619171918191919201921192219231924192519261927192819291930193119321933193419351936193719381939194019411942194319441945194619471948194919501951195219531954195519561957 |
- #define pr_fmt(fmt) "pinctrl core: " fmt
- #include <linux/kernel.h>
- #include <linux/kref.h>
- #include <linux/export.h>
- #include <linux/init.h>
- #include <linux/device.h>
- #include <linux/slab.h>
- #include <linux/err.h>
- #include <linux/list.h>
- #include <linux/sysfs.h>
- #include <linux/debugfs.h>
- #include <linux/seq_file.h>
- #include <linux/pinctrl/consumer.h>
- #include <linux/pinctrl/pinctrl.h>
- #include <linux/pinctrl/machine.h>
- #ifdef CONFIG_GPIOLIB
- #include <asm-generic/gpio.h>
- #endif
- #include "core.h"
- #include "devicetree.h"
- #include "pinmux.h"
- #include "pinconf.h"
- static bool pinctrl_dummy_state;
- static DEFINE_MUTEX(pinctrl_list_mutex);
- DEFINE_MUTEX(pinctrl_maps_mutex);
- static DEFINE_MUTEX(pinctrldev_list_mutex);
- static LIST_HEAD(pinctrldev_list);
- static LIST_HEAD(pinctrl_list);
- LIST_HEAD(pinctrl_maps);
- void pinctrl_provide_dummies(void)
- {
- pinctrl_dummy_state = true;
- }
- const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev)
- {
-
- return pctldev->desc->name;
- }
- EXPORT_SYMBOL_GPL(pinctrl_dev_get_name);
- const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev)
- {
- return dev_name(pctldev->dev);
- }
- EXPORT_SYMBOL_GPL(pinctrl_dev_get_devname);
- void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev)
- {
- return pctldev->driver_data;
- }
- EXPORT_SYMBOL_GPL(pinctrl_dev_get_drvdata);
- struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *devname)
- {
- struct pinctrl_dev *pctldev = NULL;
- if (!devname)
- return NULL;
- mutex_lock(&pinctrldev_list_mutex);
- list_for_each_entry(pctldev, &pinctrldev_list, node) {
- if (!strcmp(dev_name(pctldev->dev), devname)) {
-
- mutex_unlock(&pinctrldev_list_mutex);
- return pctldev;
- }
- }
- mutex_unlock(&pinctrldev_list_mutex);
- return NULL;
- }
- struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np)
- {
- struct pinctrl_dev *pctldev;
- mutex_lock(&pinctrldev_list_mutex);
- list_for_each_entry(pctldev, &pinctrldev_list, node)
- if (pctldev->dev->of_node == np) {
- mutex_unlock(&pinctrldev_list_mutex);
- return pctldev;
- }
- mutex_unlock(&pinctrldev_list_mutex);
- return NULL;
- }
- int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name)
- {
- unsigned i, pin;
-
- for (i = 0; i < pctldev->desc->npins; i++) {
- struct pin_desc *desc;
- pin = pctldev->desc->pins[i].number;
- desc = pin_desc_get(pctldev, pin);
-
- if (desc && !strcmp(name, desc->name))
- return pin;
- }
- return -EINVAL;
- }
- const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin)
- {
- const struct pin_desc *desc;
- desc = pin_desc_get(pctldev, pin);
- if (desc == NULL) {
- dev_err(pctldev->dev, "failed to get pin(%d) name\n",
- pin);
- return NULL;
- }
- return desc->name;
- }
- bool pin_is_valid(struct pinctrl_dev *pctldev, int pin)
- {
- struct pin_desc *pindesc;
- if (pin < 0)
- return false;
- mutex_lock(&pctldev->mutex);
- pindesc = pin_desc_get(pctldev, pin);
- mutex_unlock(&pctldev->mutex);
- return pindesc != NULL;
- }
- EXPORT_SYMBOL_GPL(pin_is_valid);
- static void pinctrl_free_pindescs(struct pinctrl_dev *pctldev,
- const struct pinctrl_pin_desc *pins,
- unsigned num_pins)
- {
- int i;
- for (i = 0; i < num_pins; i++) {
- struct pin_desc *pindesc;
- pindesc = radix_tree_lookup(&pctldev->pin_desc_tree,
- pins[i].number);
- if (pindesc != NULL) {
- radix_tree_delete(&pctldev->pin_desc_tree,
- pins[i].number);
- if (pindesc->dynamic_name)
- kfree(pindesc->name);
- }
- kfree(pindesc);
- }
- }
- static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev,
- const struct pinctrl_pin_desc *pin)
- {
- struct pin_desc *pindesc;
- pindesc = pin_desc_get(pctldev, pin->number);
- if (pindesc != NULL) {
- dev_err(pctldev->dev, "pin %d already registered\n",
- pin->number);
- return -EINVAL;
- }
- pindesc = kzalloc(sizeof(*pindesc), GFP_KERNEL);
- if (pindesc == NULL) {
- dev_err(pctldev->dev, "failed to alloc struct pin_desc\n");
- return -ENOMEM;
- }
-
- pindesc->pctldev = pctldev;
-
- if (pin->name) {
- pindesc->name = pin->name;
- } else {
- pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", pin->number);
- if (pindesc->name == NULL) {
- kfree(pindesc);
- return -ENOMEM;
- }
- pindesc->dynamic_name = true;
- }
- pindesc->drv_data = pin->drv_data;
- radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc);
- pr_debug("registered pin %d (%s) on %s\n",
- pin->number, pindesc->name, pctldev->desc->name);
- return 0;
- }
- static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
- struct pinctrl_pin_desc const *pins,
- unsigned num_descs)
- {
- unsigned i;
- int ret = 0;
- for (i = 0; i < num_descs; i++) {
- ret = pinctrl_register_one_pin(pctldev, &pins[i]);
- if (ret)
- return ret;
- }
- return 0;
- }
- static inline int gpio_to_pin(struct pinctrl_gpio_range *range,
- unsigned int gpio)
- {
- unsigned int offset = gpio - range->base;
- if (range->pins)
- return range->pins[offset];
- else
- return range->pin_base + offset;
- }
- static struct pinctrl_gpio_range *
- pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
- {
- struct pinctrl_gpio_range *range = NULL;
- mutex_lock(&pctldev->mutex);
-
- list_for_each_entry(range, &pctldev->gpio_ranges, node) {
-
- if (gpio >= range->base &&
- gpio < range->base + range->npins) {
- mutex_unlock(&pctldev->mutex);
- return range;
- }
- }
- mutex_unlock(&pctldev->mutex);
- return NULL;
- }
- #ifdef CONFIG_GPIOLIB
- static bool pinctrl_ready_for_gpio_range(unsigned gpio)
- {
- struct pinctrl_dev *pctldev;
- struct pinctrl_gpio_range *range = NULL;
- struct gpio_chip *chip = gpio_to_chip(gpio);
- if (WARN(!chip, "no gpio_chip for gpio%i?", gpio))
- return false;
- mutex_lock(&pinctrldev_list_mutex);
-
- list_for_each_entry(pctldev, &pinctrldev_list, node) {
-
- mutex_lock(&pctldev->mutex);
- list_for_each_entry(range, &pctldev->gpio_ranges, node) {
-
- if (range->base + range->npins - 1 < chip->base ||
- range->base > chip->base + chip->ngpio - 1)
- continue;
- mutex_unlock(&pctldev->mutex);
- mutex_unlock(&pinctrldev_list_mutex);
- return true;
- }
- mutex_unlock(&pctldev->mutex);
- }
- mutex_unlock(&pinctrldev_list_mutex);
- return false;
- }
- #else
- static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; }
- #endif
- static int pinctrl_get_device_gpio_range(unsigned gpio,
- struct pinctrl_dev **outdev,
- struct pinctrl_gpio_range **outrange)
- {
- struct pinctrl_dev *pctldev = NULL;
- mutex_lock(&pinctrldev_list_mutex);
-
- list_for_each_entry(pctldev, &pinctrldev_list, node) {
- struct pinctrl_gpio_range *range;
- range = pinctrl_match_gpio_range(pctldev, gpio);
- if (range != NULL) {
- *outdev = pctldev;
- *outrange = range;
- mutex_unlock(&pinctrldev_list_mutex);
- return 0;
- }
- }
- mutex_unlock(&pinctrldev_list_mutex);
- return -EPROBE_DEFER;
- }
- void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
- struct pinctrl_gpio_range *range)
- {
- mutex_lock(&pctldev->mutex);
- list_add_tail(&range->node, &pctldev->gpio_ranges);
- mutex_unlock(&pctldev->mutex);
- }
- EXPORT_SYMBOL_GPL(pinctrl_add_gpio_range);
- void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
- struct pinctrl_gpio_range *ranges,
- unsigned nranges)
- {
- int i;
- for (i = 0; i < nranges; i++)
- pinctrl_add_gpio_range(pctldev, &ranges[i]);
- }
- EXPORT_SYMBOL_GPL(pinctrl_add_gpio_ranges);
- struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
- struct pinctrl_gpio_range *range)
- {
- struct pinctrl_dev *pctldev;
- pctldev = get_pinctrl_dev_from_devname(devname);
-
- if (!pctldev) {
- return ERR_PTR(-EPROBE_DEFER);
- }
- pinctrl_add_gpio_range(pctldev, range);
- return pctldev;
- }
- EXPORT_SYMBOL_GPL(pinctrl_find_and_add_gpio_range);
- int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group,
- const unsigned **pins, unsigned *num_pins)
- {
- const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
- int gs;
- if (!pctlops->get_group_pins)
- return -EINVAL;
- gs = pinctrl_get_group_selector(pctldev, pin_group);
- if (gs < 0)
- return gs;
- return pctlops->get_group_pins(pctldev, gs, pins, num_pins);
- }
- EXPORT_SYMBOL_GPL(pinctrl_get_group_pins);
- struct pinctrl_gpio_range *
- pinctrl_find_gpio_range_from_pin_nolock(struct pinctrl_dev *pctldev,
- unsigned int pin)
- {
- struct pinctrl_gpio_range *range;
-
- list_for_each_entry(range, &pctldev->gpio_ranges, node) {
-
- if (range->pins) {
- int a;
- for (a = 0; a < range->npins; a++) {
- if (range->pins[a] == pin)
- return range;
- }
- } else if (pin >= range->pin_base &&
- pin < range->pin_base + range->npins)
- return range;
- }
- return NULL;
- }
- EXPORT_SYMBOL_GPL(pinctrl_find_gpio_range_from_pin_nolock);
- struct pinctrl_gpio_range *
- pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
- unsigned int pin)
- {
- struct pinctrl_gpio_range *range;
- mutex_lock(&pctldev->mutex);
- range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
- mutex_unlock(&pctldev->mutex);
- return range;
- }
- EXPORT_SYMBOL_GPL(pinctrl_find_gpio_range_from_pin);
- void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
- struct pinctrl_gpio_range *range)
- {
- mutex_lock(&pctldev->mutex);
- list_del(&range->node);
- mutex_unlock(&pctldev->mutex);
- }
- EXPORT_SYMBOL_GPL(pinctrl_remove_gpio_range);
- int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
- const char *pin_group)
- {
- const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
- unsigned ngroups = pctlops->get_groups_count(pctldev);
- unsigned group_selector = 0;
- while (group_selector < ngroups) {
- const char *gname = pctlops->get_group_name(pctldev,
- group_selector);
- if (!strcmp(gname, pin_group)) {
- dev_dbg(pctldev->dev,
- "found group selector %u for %s\n",
- group_selector,
- pin_group);
- return group_selector;
- }
- group_selector++;
- }
- dev_err(pctldev->dev, "does not have pin group %s\n",
- pin_group);
- return -EINVAL;
- }
- int pinctrl_request_gpio(unsigned gpio)
- {
- struct pinctrl_dev *pctldev;
- struct pinctrl_gpio_range *range;
- int ret;
- int pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
- if (ret) {
- if (pinctrl_ready_for_gpio_range(gpio))
- ret = 0;
- return ret;
- }
- mutex_lock(&pctldev->mutex);
-
- pin = gpio_to_pin(range, gpio);
- ret = pinmux_request_gpio(pctldev, range, pin, gpio);
- mutex_unlock(&pctldev->mutex);
- return ret;
- }
- EXPORT_SYMBOL_GPL(pinctrl_request_gpio);
- void pinctrl_free_gpio(unsigned gpio)
- {
- struct pinctrl_dev *pctldev;
- struct pinctrl_gpio_range *range;
- int ret;
- int pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
- if (ret) {
- return;
- }
- mutex_lock(&pctldev->mutex);
-
- pin = gpio_to_pin(range, gpio);
- pinmux_free_gpio(pctldev, pin, range);
- mutex_unlock(&pctldev->mutex);
- }
- EXPORT_SYMBOL_GPL(pinctrl_free_gpio);
- static int pinctrl_gpio_direction(unsigned gpio, bool input)
- {
- struct pinctrl_dev *pctldev;
- struct pinctrl_gpio_range *range;
- int ret;
- int pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
- if (ret) {
- return ret;
- }
- mutex_lock(&pctldev->mutex);
-
- pin = gpio_to_pin(range, gpio);
- ret = pinmux_gpio_direction(pctldev, range, pin, input);
- mutex_unlock(&pctldev->mutex);
- return ret;
- }
- int pinctrl_gpio_direction_input(unsigned gpio)
- {
- return pinctrl_gpio_direction(gpio, true);
- }
- EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_input);
- int pinctrl_gpio_direction_output(unsigned gpio)
- {
- return pinctrl_gpio_direction(gpio, false);
- }
- EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output);
- static struct pinctrl_state *find_state(struct pinctrl *p,
- const char *name)
- {
- struct pinctrl_state *state;
- list_for_each_entry(state, &p->states, node)
- if (!strcmp(state->name, name))
- return state;
- return NULL;
- }
- static struct pinctrl_state *create_state(struct pinctrl *p,
- const char *name)
- {
- struct pinctrl_state *state;
- state = kzalloc(sizeof(*state), GFP_KERNEL);
- if (state == NULL) {
- dev_err(p->dev,
- "failed to alloc struct pinctrl_state\n");
- return ERR_PTR(-ENOMEM);
- }
- state->name = name;
- INIT_LIST_HEAD(&state->settings);
- list_add_tail(&state->node, &p->states);
- return state;
- }
- static int add_setting(struct pinctrl *p, struct pinctrl_map const *map)
- {
- struct pinctrl_state *state;
- struct pinctrl_setting *setting;
- int ret;
- state = find_state(p, map->name);
- if (!state)
- state = create_state(p, map->name);
- if (IS_ERR(state))
- return PTR_ERR(state);
- if (map->type == PIN_MAP_TYPE_DUMMY_STATE)
- return 0;
- setting = kzalloc(sizeof(*setting), GFP_KERNEL);
- if (setting == NULL) {
- dev_err(p->dev,
- "failed to alloc struct pinctrl_setting\n");
- return -ENOMEM;
- }
- setting->type = map->type;
- setting->pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
- if (setting->pctldev == NULL) {
- kfree(setting);
-
- if (!strcmp(map->ctrl_dev_name, map->dev_name))
- return -ENODEV;
-
- dev_info(p->dev, "unknown pinctrl device %s in map entry, deferring probe",
- map->ctrl_dev_name);
- return -EPROBE_DEFER;
- }
- setting->dev_name = map->dev_name;
- switch (map->type) {
- case PIN_MAP_TYPE_MUX_GROUP:
- ret = pinmux_map_to_setting(map, setting);
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- ret = pinconf_map_to_setting(map, setting);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- if (ret < 0) {
- kfree(setting);
- return ret;
- }
- list_add_tail(&setting->node, &state->settings);
- return 0;
- }
- static struct pinctrl *find_pinctrl(struct device *dev)
- {
- struct pinctrl *p;
- mutex_lock(&pinctrl_list_mutex);
- list_for_each_entry(p, &pinctrl_list, node)
- if (p->dev == dev) {
- mutex_unlock(&pinctrl_list_mutex);
- return p;
- }
- mutex_unlock(&pinctrl_list_mutex);
- return NULL;
- }
- static void pinctrl_free(struct pinctrl *p, bool inlist);
- static struct pinctrl *create_pinctrl(struct device *dev)
- {
- struct pinctrl *p;
- const char *devname;
- struct pinctrl_maps *maps_node;
- int i;
- struct pinctrl_map const *map;
- int ret;
-
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (p == NULL) {
- dev_err(dev, "failed to alloc struct pinctrl\n");
- return ERR_PTR(-ENOMEM);
- }
- p->dev = dev;
- INIT_LIST_HEAD(&p->states);
- INIT_LIST_HEAD(&p->dt_maps);
- ret = pinctrl_dt_to_map(p);
- if (ret < 0) {
- kfree(p);
- return ERR_PTR(ret);
- }
- devname = dev_name(dev);
- mutex_lock(&pinctrl_maps_mutex);
-
- for_each_maps(maps_node, i, map) {
-
- if (strcmp(map->dev_name, devname))
- continue;
- ret = add_setting(p, map);
-
- if (ret == -EPROBE_DEFER) {
- pinctrl_free(p, false);
- mutex_unlock(&pinctrl_maps_mutex);
- return ERR_PTR(ret);
- }
- }
- mutex_unlock(&pinctrl_maps_mutex);
- if (ret < 0) {
-
- pinctrl_free(p, false);
- return ERR_PTR(ret);
- }
- kref_init(&p->users);
-
- mutex_lock(&pinctrl_list_mutex);
- list_add_tail(&p->node, &pinctrl_list);
- mutex_unlock(&pinctrl_list_mutex);
- return p;
- }
- struct pinctrl *pinctrl_get(struct device *dev)
- {
- struct pinctrl *p;
- if (WARN_ON(!dev))
- return ERR_PTR(-EINVAL);
-
- p = find_pinctrl(dev);
- if (p != NULL) {
- dev_dbg(dev, "obtain a copy of previously claimed pinctrl\n");
- kref_get(&p->users);
- return p;
- }
- return create_pinctrl(dev);
- }
- EXPORT_SYMBOL_GPL(pinctrl_get);
- static void pinctrl_free_setting(bool disable_setting,
- struct pinctrl_setting *setting)
- {
- switch (setting->type) {
- case PIN_MAP_TYPE_MUX_GROUP:
- if (disable_setting)
- pinmux_disable_setting(setting);
- pinmux_free_setting(setting);
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- pinconf_free_setting(setting);
- break;
- default:
- break;
- }
- }
- static void pinctrl_free(struct pinctrl *p, bool inlist)
- {
- struct pinctrl_state *state, *n1;
- struct pinctrl_setting *setting, *n2;
- mutex_lock(&pinctrl_list_mutex);
- list_for_each_entry_safe(state, n1, &p->states, node) {
- list_for_each_entry_safe(setting, n2, &state->settings, node) {
- pinctrl_free_setting(state == p->state, setting);
- list_del(&setting->node);
- kfree(setting);
- }
- list_del(&state->node);
- kfree(state);
- }
- pinctrl_dt_free_maps(p);
- if (inlist)
- list_del(&p->node);
- kfree(p);
- mutex_unlock(&pinctrl_list_mutex);
- }
- static void pinctrl_release(struct kref *kref)
- {
- struct pinctrl *p = container_of(kref, struct pinctrl, users);
- pinctrl_free(p, true);
- }
- void pinctrl_put(struct pinctrl *p)
- {
- kref_put(&p->users, pinctrl_release);
- }
- EXPORT_SYMBOL_GPL(pinctrl_put);
- struct pinctrl_state *pinctrl_lookup_state(struct pinctrl *p,
- const char *name)
- {
- struct pinctrl_state *state;
- state = find_state(p, name);
- if (!state) {
- if (pinctrl_dummy_state) {
-
- dev_dbg(p->dev, "using pinctrl dummy state (%s)\n",
- name);
- state = create_state(p, name);
- } else
- state = ERR_PTR(-ENODEV);
- }
- return state;
- }
- EXPORT_SYMBOL_GPL(pinctrl_lookup_state);
- static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state)
- {
- struct pinctrl_setting *setting, *setting2;
- struct pinctrl_state *old_state = p->state;
- int ret;
- if (p->state) {
-
- list_for_each_entry(setting, &p->state->settings, node) {
- if (setting->type != PIN_MAP_TYPE_MUX_GROUP)
- continue;
- pinmux_disable_setting(setting);
- }
- }
- p->state = NULL;
-
- list_for_each_entry(setting, &state->settings, node) {
- switch (setting->type) {
- case PIN_MAP_TYPE_MUX_GROUP:
- ret = pinmux_enable_setting(setting);
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- ret = pinconf_apply_setting(setting);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- if (ret < 0) {
- goto unapply_new_state;
- }
- }
- p->state = state;
- return 0;
- unapply_new_state:
- dev_err(p->dev, "Error applying setting, reverse things back\n");
- list_for_each_entry(setting2, &state->settings, node) {
- if (&setting2->node == &setting->node)
- break;
-
- if (setting2->type == PIN_MAP_TYPE_MUX_GROUP)
- pinmux_disable_setting(setting2);
- }
-
- if (old_state)
- pinctrl_select_state(p, old_state);
- return ret;
- }
- int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *state)
- {
- if (p->state == state)
- return 0;
- return pinctrl_commit_state(p, state);
- }
- EXPORT_SYMBOL_GPL(pinctrl_select_state);
- static void devm_pinctrl_release(struct device *dev, void *res)
- {
- pinctrl_put(*(struct pinctrl **)res);
- }
- struct pinctrl *devm_pinctrl_get(struct device *dev)
- {
- struct pinctrl **ptr, *p;
- ptr = devres_alloc(devm_pinctrl_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
- p = pinctrl_get(dev);
- if (!IS_ERR(p)) {
- *ptr = p;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
- return p;
- }
- EXPORT_SYMBOL_GPL(devm_pinctrl_get);
- static int devm_pinctrl_match(struct device *dev, void *res, void *data)
- {
- struct pinctrl **p = res;
- return *p == data;
- }
- void devm_pinctrl_put(struct pinctrl *p)
- {
- WARN_ON(devres_release(p->dev, devm_pinctrl_release,
- devm_pinctrl_match, p));
- }
- EXPORT_SYMBOL_GPL(devm_pinctrl_put);
- int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
- bool dup)
- {
- int i, ret;
- struct pinctrl_maps *maps_node;
- pr_debug("add %u pinctrl maps\n", num_maps);
-
- for (i = 0; i < num_maps; i++) {
- if (!maps[i].dev_name) {
- pr_err("failed to register map %s (%d): no device given\n",
- maps[i].name, i);
- return -EINVAL;
- }
- if (!maps[i].name) {
- pr_err("failed to register map %d: no map name given\n",
- i);
- return -EINVAL;
- }
- if (maps[i].type != PIN_MAP_TYPE_DUMMY_STATE &&
- !maps[i].ctrl_dev_name) {
- pr_err("failed to register map %s (%d): no pin control device given\n",
- maps[i].name, i);
- return -EINVAL;
- }
- switch (maps[i].type) {
- case PIN_MAP_TYPE_DUMMY_STATE:
- break;
- case PIN_MAP_TYPE_MUX_GROUP:
- ret = pinmux_validate_map(&maps[i], i);
- if (ret < 0)
- return ret;
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- ret = pinconf_validate_map(&maps[i], i);
- if (ret < 0)
- return ret;
- break;
- default:
- pr_err("failed to register map %s (%d): invalid type given\n",
- maps[i].name, i);
- return -EINVAL;
- }
- }
- maps_node = kzalloc(sizeof(*maps_node), GFP_KERNEL);
- if (!maps_node) {
- pr_err("failed to alloc struct pinctrl_maps\n");
- return -ENOMEM;
- }
- maps_node->num_maps = num_maps;
- if (dup) {
- maps_node->maps = kmemdup(maps, sizeof(*maps) * num_maps,
- GFP_KERNEL);
- if (!maps_node->maps) {
- pr_err("failed to duplicate mapping table\n");
- kfree(maps_node);
- return -ENOMEM;
- }
- } else {
- maps_node->maps = maps;
- }
- mutex_lock(&pinctrl_maps_mutex);
- list_add_tail(&maps_node->node, &pinctrl_maps);
- mutex_unlock(&pinctrl_maps_mutex);
- return 0;
- }
- int pinctrl_register_mappings(struct pinctrl_map const *maps,
- unsigned num_maps)
- {
- return pinctrl_register_map(maps, num_maps, true);
- }
- void pinctrl_unregister_map(struct pinctrl_map const *map)
- {
- struct pinctrl_maps *maps_node;
- mutex_lock(&pinctrl_maps_mutex);
- list_for_each_entry(maps_node, &pinctrl_maps, node) {
- if (maps_node->maps == map) {
- list_del(&maps_node->node);
- kfree(maps_node);
- mutex_unlock(&pinctrl_maps_mutex);
- return;
- }
- }
- mutex_unlock(&pinctrl_maps_mutex);
- }
- int pinctrl_force_sleep(struct pinctrl_dev *pctldev)
- {
- if (!IS_ERR(pctldev->p) && !IS_ERR(pctldev->hog_sleep))
- return pinctrl_commit_state(pctldev->p, pctldev->hog_sleep);
- return 0;
- }
- EXPORT_SYMBOL_GPL(pinctrl_force_sleep);
- int pinctrl_force_default(struct pinctrl_dev *pctldev)
- {
- if (!IS_ERR(pctldev->p) && !IS_ERR(pctldev->hog_default))
- return pinctrl_commit_state(pctldev->p, pctldev->hog_default);
- return 0;
- }
- EXPORT_SYMBOL_GPL(pinctrl_force_default);
- int pinctrl_init_done(struct device *dev)
- {
- struct dev_pin_info *pins = dev->pins;
- int ret;
- if (!pins)
- return 0;
- if (IS_ERR(pins->init_state))
- return 0;
- if (pins->p->state != pins->init_state)
- return 0;
- if (IS_ERR(pins->default_state))
- return 0;
- ret = pinctrl_select_state(pins->p, pins->default_state);
- if (ret)
- dev_err(dev, "failed to activate default pinctrl state\n");
- return ret;
- }
- #ifdef CONFIG_PM
- static int pinctrl_pm_select_state(struct device *dev,
- struct pinctrl_state *state)
- {
- struct dev_pin_info *pins = dev->pins;
- int ret;
- if (IS_ERR(state))
- return 0;
- ret = pinctrl_select_state(pins->p, state);
- if (ret)
- dev_err(dev, "failed to activate pinctrl state %s\n",
- state->name);
- return ret;
- }
- int pinctrl_pm_select_default_state(struct device *dev)
- {
- if (!dev->pins)
- return 0;
- return pinctrl_pm_select_state(dev, dev->pins->default_state);
- }
- EXPORT_SYMBOL_GPL(pinctrl_pm_select_default_state);
- int pinctrl_pm_select_sleep_state(struct device *dev)
- {
- if (!dev->pins)
- return 0;
- return pinctrl_pm_select_state(dev, dev->pins->sleep_state);
- }
- EXPORT_SYMBOL_GPL(pinctrl_pm_select_sleep_state);
- int pinctrl_pm_select_idle_state(struct device *dev)
- {
- if (!dev->pins)
- return 0;
- return pinctrl_pm_select_state(dev, dev->pins->idle_state);
- }
- EXPORT_SYMBOL_GPL(pinctrl_pm_select_idle_state);
- #endif
- #ifdef CONFIG_DEBUG_FS
- static int pinctrl_pins_show(struct seq_file *s, void *what)
- {
- struct pinctrl_dev *pctldev = s->private;
- const struct pinctrl_ops *ops = pctldev->desc->pctlops;
- unsigned i, pin;
- seq_printf(s, "registered pins: %d\n", pctldev->desc->npins);
- mutex_lock(&pctldev->mutex);
-
- for (i = 0; i < pctldev->desc->npins; i++) {
- struct pin_desc *desc;
- pin = pctldev->desc->pins[i].number;
- desc = pin_desc_get(pctldev, pin);
-
- if (desc == NULL)
- continue;
- seq_printf(s, "pin %d (%s) ", pin, desc->name);
-
- if (ops->pin_dbg_show)
- ops->pin_dbg_show(pctldev, s, pin);
- seq_puts(s, "\n");
- }
- mutex_unlock(&pctldev->mutex);
- return 0;
- }
- static int pinctrl_groups_show(struct seq_file *s, void *what)
- {
- struct pinctrl_dev *pctldev = s->private;
- const struct pinctrl_ops *ops = pctldev->desc->pctlops;
- unsigned ngroups, selector = 0;
- mutex_lock(&pctldev->mutex);
- ngroups = ops->get_groups_count(pctldev);
- seq_puts(s, "registered pin groups:\n");
- while (selector < ngroups) {
- const unsigned *pins = NULL;
- unsigned num_pins = 0;
- const char *gname = ops->get_group_name(pctldev, selector);
- const char *pname;
- int ret = 0;
- int i;
- if (ops->get_group_pins)
- ret = ops->get_group_pins(pctldev, selector,
- &pins, &num_pins);
- if (ret)
- seq_printf(s, "%s [ERROR GETTING PINS]\n",
- gname);
- else {
- seq_printf(s, "group: %s\n", gname);
- for (i = 0; i < num_pins; i++) {
- pname = pin_get_name(pctldev, pins[i]);
- if (WARN_ON(!pname)) {
- mutex_unlock(&pctldev->mutex);
- return -EINVAL;
- }
- seq_printf(s, "pin %d (%s)\n", pins[i], pname);
- }
- seq_puts(s, "\n");
- }
- selector++;
- }
- mutex_unlock(&pctldev->mutex);
- return 0;
- }
- static int pinctrl_gpioranges_show(struct seq_file *s, void *what)
- {
- struct pinctrl_dev *pctldev = s->private;
- struct pinctrl_gpio_range *range = NULL;
- seq_puts(s, "GPIO ranges handled:\n");
- mutex_lock(&pctldev->mutex);
-
- list_for_each_entry(range, &pctldev->gpio_ranges, node) {
- if (range->pins) {
- int a;
- seq_printf(s, "%u: %s GPIOS [%u - %u] PINS {",
- range->id, range->name,
- range->base, (range->base + range->npins - 1));
- for (a = 0; a < range->npins - 1; a++)
- seq_printf(s, "%u, ", range->pins[a]);
- seq_printf(s, "%u}\n", range->pins[a]);
- }
- else
- seq_printf(s, "%u: %s GPIOS [%u - %u] PINS [%u - %u]\n",
- range->id, range->name,
- range->base, (range->base + range->npins - 1),
- range->pin_base,
- (range->pin_base + range->npins - 1));
- }
- mutex_unlock(&pctldev->mutex);
- return 0;
- }
- static int pinctrl_devices_show(struct seq_file *s, void *what)
- {
- struct pinctrl_dev *pctldev;
- seq_puts(s, "name [pinmux] [pinconf]\n");
- mutex_lock(&pinctrldev_list_mutex);
- list_for_each_entry(pctldev, &pinctrldev_list, node) {
- seq_printf(s, "%s ", pctldev->desc->name);
- if (pctldev->desc->pmxops)
- seq_puts(s, "yes ");
- else
- seq_puts(s, "no ");
- if (pctldev->desc->confops)
- seq_puts(s, "yes");
- else
- seq_puts(s, "no");
- seq_puts(s, "\n");
- }
- mutex_unlock(&pinctrldev_list_mutex);
- return 0;
- }
- static inline const char *map_type(enum pinctrl_map_type type)
- {
- static const char * const names[] = {
- "INVALID",
- "DUMMY_STATE",
- "MUX_GROUP",
- "CONFIGS_PIN",
- "CONFIGS_GROUP",
- };
- if (type >= ARRAY_SIZE(names))
- return "UNKNOWN";
- return names[type];
- }
- static int pinctrl_maps_show(struct seq_file *s, void *what)
- {
- struct pinctrl_maps *maps_node;
- int i;
- struct pinctrl_map const *map;
- seq_puts(s, "Pinctrl maps:\n");
- mutex_lock(&pinctrl_maps_mutex);
- for_each_maps(maps_node, i, map) {
- seq_printf(s, "device %s\nstate %s\ntype %s (%d)\n",
- map->dev_name, map->name, map_type(map->type),
- map->type);
- if (map->type != PIN_MAP_TYPE_DUMMY_STATE)
- seq_printf(s, "controlling device %s\n",
- map->ctrl_dev_name);
- switch (map->type) {
- case PIN_MAP_TYPE_MUX_GROUP:
- pinmux_show_map(s, map);
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- pinconf_show_map(s, map);
- break;
- default:
- break;
- }
- seq_printf(s, "\n");
- }
- mutex_unlock(&pinctrl_maps_mutex);
- return 0;
- }
- static int pinctrl_show(struct seq_file *s, void *what)
- {
- struct pinctrl *p;
- struct pinctrl_state *state;
- struct pinctrl_setting *setting;
- seq_puts(s, "Requested pin control handlers their pinmux maps:\n");
- mutex_lock(&pinctrl_list_mutex);
- list_for_each_entry(p, &pinctrl_list, node) {
- seq_printf(s, "device: %s current state: %s\n",
- dev_name(p->dev),
- p->state ? p->state->name : "none");
- list_for_each_entry(state, &p->states, node) {
- seq_printf(s, " state: %s\n", state->name);
- list_for_each_entry(setting, &state->settings, node) {
- struct pinctrl_dev *pctldev = setting->pctldev;
- seq_printf(s, " type: %s controller %s ",
- map_type(setting->type),
- pinctrl_dev_get_name(pctldev));
- switch (setting->type) {
- case PIN_MAP_TYPE_MUX_GROUP:
- pinmux_show_setting(s, setting);
- break;
- case PIN_MAP_TYPE_CONFIGS_PIN:
- case PIN_MAP_TYPE_CONFIGS_GROUP:
- pinconf_show_setting(s, setting);
- break;
- default:
- break;
- }
- }
- }
- }
- mutex_unlock(&pinctrl_list_mutex);
- return 0;
- }
- static int pinctrl_pins_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_pins_show, inode->i_private);
- }
- static int pinctrl_groups_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_groups_show, inode->i_private);
- }
- static int pinctrl_gpioranges_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_gpioranges_show, inode->i_private);
- }
- static int pinctrl_devices_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_devices_show, NULL);
- }
- static int pinctrl_maps_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_maps_show, NULL);
- }
- static int pinctrl_open(struct inode *inode, struct file *file)
- {
- return single_open(file, pinctrl_show, NULL);
- }
- static const struct file_operations pinctrl_pins_ops = {
- .open = pinctrl_pins_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const struct file_operations pinctrl_groups_ops = {
- .open = pinctrl_groups_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const struct file_operations pinctrl_gpioranges_ops = {
- .open = pinctrl_gpioranges_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const struct file_operations pinctrl_devices_ops = {
- .open = pinctrl_devices_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const struct file_operations pinctrl_maps_ops = {
- .open = pinctrl_maps_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const struct file_operations pinctrl_ops = {
- .open = pinctrl_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static struct dentry *debugfs_root;
- static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
- {
- struct dentry *device_root;
- device_root = debugfs_create_dir(dev_name(pctldev->dev),
- debugfs_root);
- pctldev->device_root = device_root;
- if (IS_ERR(device_root) || !device_root) {
- pr_warn("failed to create debugfs directory for %s\n",
- dev_name(pctldev->dev));
- return;
- }
- debugfs_create_file("pins", S_IFREG | S_IRUGO,
- device_root, pctldev, &pinctrl_pins_ops);
- debugfs_create_file("pingroups", S_IFREG | S_IRUGO,
- device_root, pctldev, &pinctrl_groups_ops);
- debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO,
- device_root, pctldev, &pinctrl_gpioranges_ops);
- if (pctldev->desc->pmxops)
- pinmux_init_device_debugfs(device_root, pctldev);
- if (pctldev->desc->confops)
- pinconf_init_device_debugfs(device_root, pctldev);
- }
- static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
- {
- debugfs_remove_recursive(pctldev->device_root);
- }
- static void pinctrl_init_debugfs(void)
- {
- debugfs_root = debugfs_create_dir("pinctrl", NULL);
- if (IS_ERR(debugfs_root) || !debugfs_root) {
- pr_warn("failed to create debugfs directory\n");
- debugfs_root = NULL;
- return;
- }
- debugfs_create_file("pinctrl-devices", S_IFREG | S_IRUGO,
- debugfs_root, NULL, &pinctrl_devices_ops);
- debugfs_create_file("pinctrl-maps", S_IFREG | S_IRUGO,
- debugfs_root, NULL, &pinctrl_maps_ops);
- debugfs_create_file("pinctrl-handles", S_IFREG | S_IRUGO,
- debugfs_root, NULL, &pinctrl_ops);
- }
- #else
- static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
- {
- }
- static void pinctrl_init_debugfs(void)
- {
- }
- static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
- {
- }
- #endif
- static int pinctrl_check_ops(struct pinctrl_dev *pctldev)
- {
- const struct pinctrl_ops *ops = pctldev->desc->pctlops;
- if (!ops ||
- !ops->get_groups_count ||
- !ops->get_group_name)
- return -EINVAL;
- if (ops->dt_node_to_map && !ops->dt_free_map)
- return -EINVAL;
- return 0;
- }
- struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
- struct device *dev, void *driver_data)
- {
- struct pinctrl_dev *pctldev;
- int ret;
- if (!pctldesc)
- return ERR_PTR(-EINVAL);
- if (!pctldesc->name)
- return ERR_PTR(-EINVAL);
- pctldev = kzalloc(sizeof(*pctldev), GFP_KERNEL);
- if (pctldev == NULL) {
- dev_err(dev, "failed to alloc struct pinctrl_dev\n");
- return ERR_PTR(-ENOMEM);
- }
-
- pctldev->owner = pctldesc->owner;
- pctldev->desc = pctldesc;
- pctldev->driver_data = driver_data;
- INIT_RADIX_TREE(&pctldev->pin_desc_tree, GFP_KERNEL);
- INIT_LIST_HEAD(&pctldev->gpio_ranges);
- pctldev->dev = dev;
- mutex_init(&pctldev->mutex);
-
- ret = pinctrl_check_ops(pctldev);
- if (ret) {
- dev_err(dev, "pinctrl ops lacks necessary functions\n");
- goto out_err;
- }
-
- if (pctldesc->pmxops) {
- ret = pinmux_check_ops(pctldev);
- if (ret)
- goto out_err;
- }
-
- if (pctldesc->confops) {
- ret = pinconf_check_ops(pctldev);
- if (ret)
- goto out_err;
- }
-
- dev_dbg(dev, "try to register %d pins ...\n", pctldesc->npins);
- ret = pinctrl_register_pins(pctldev, pctldesc->pins, pctldesc->npins);
- if (ret) {
- dev_err(dev, "error during pin registration\n");
- pinctrl_free_pindescs(pctldev, pctldesc->pins,
- pctldesc->npins);
- goto out_err;
- }
- mutex_lock(&pinctrldev_list_mutex);
- list_add_tail(&pctldev->node, &pinctrldev_list);
- mutex_unlock(&pinctrldev_list_mutex);
- pctldev->p = pinctrl_get(pctldev->dev);
- if (!IS_ERR(pctldev->p)) {
- pctldev->hog_default =
- pinctrl_lookup_state(pctldev->p, PINCTRL_STATE_DEFAULT);
- if (IS_ERR(pctldev->hog_default)) {
- dev_dbg(dev, "failed to lookup the default state\n");
- } else {
- if (pinctrl_select_state(pctldev->p,
- pctldev->hog_default))
- dev_err(dev,
- "failed to select default state\n");
- }
- pctldev->hog_sleep =
- pinctrl_lookup_state(pctldev->p,
- PINCTRL_STATE_SLEEP);
- if (IS_ERR(pctldev->hog_sleep))
- dev_dbg(dev, "failed to lookup the sleep state\n");
- }
- pinctrl_init_device_debugfs(pctldev);
- return pctldev;
- out_err:
- mutex_destroy(&pctldev->mutex);
- kfree(pctldev);
- return ERR_PTR(ret);
- }
- EXPORT_SYMBOL_GPL(pinctrl_register);
- void pinctrl_unregister(struct pinctrl_dev *pctldev)
- {
- struct pinctrl_gpio_range *range, *n;
- if (pctldev == NULL)
- return;
- mutex_lock(&pctldev->mutex);
- pinctrl_remove_device_debugfs(pctldev);
- mutex_unlock(&pctldev->mutex);
- if (!IS_ERR(pctldev->p))
- pinctrl_put(pctldev->p);
- mutex_lock(&pinctrldev_list_mutex);
- mutex_lock(&pctldev->mutex);
-
- list_del(&pctldev->node);
-
- pinctrl_free_pindescs(pctldev, pctldev->desc->pins,
- pctldev->desc->npins);
-
- list_for_each_entry_safe(range, n, &pctldev->gpio_ranges, node)
- list_del(&range->node);
- mutex_unlock(&pctldev->mutex);
- mutex_destroy(&pctldev->mutex);
- kfree(pctldev);
- mutex_unlock(&pinctrldev_list_mutex);
- }
- EXPORT_SYMBOL_GPL(pinctrl_unregister);
- static void devm_pinctrl_dev_release(struct device *dev, void *res)
- {
- struct pinctrl_dev *pctldev = *(struct pinctrl_dev **)res;
- pinctrl_unregister(pctldev);
- }
- static int devm_pinctrl_dev_match(struct device *dev, void *res, void *data)
- {
- struct pctldev **r = res;
- if (WARN_ON(!r || !*r))
- return 0;
- return *r == data;
- }
- struct pinctrl_dev *devm_pinctrl_register(struct device *dev,
- struct pinctrl_desc *pctldesc,
- void *driver_data)
- {
- struct pinctrl_dev **ptr, *pctldev;
- ptr = devres_alloc(devm_pinctrl_dev_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
- pctldev = pinctrl_register(pctldesc, dev, driver_data);
- if (IS_ERR(pctldev)) {
- devres_free(ptr);
- return pctldev;
- }
- *ptr = pctldev;
- devres_add(dev, ptr);
- return pctldev;
- }
- EXPORT_SYMBOL_GPL(devm_pinctrl_register);
- void devm_pinctrl_unregister(struct device *dev, struct pinctrl_dev *pctldev)
- {
- WARN_ON(devres_release(dev, devm_pinctrl_dev_release,
- devm_pinctrl_dev_match, pctldev));
- }
- EXPORT_SYMBOL_GPL(devm_pinctrl_unregister);
- static int __init pinctrl_init(void)
- {
- pr_info("initialized pinctrl subsystem\n");
- pinctrl_init_debugfs();
- return 0;
- }
- core_initcall(pinctrl_init);
|