1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2013 Google, Inc
8 #include <dm/device_compat.h>
9 #include <dm/device-internal.h>
11 #include <dm/uclass-internal.h>
12 #include <dt-bindings/gpio/gpio.h>
17 #include <linux/bug.h>
18 #include <linux/ctype.h>
20 DECLARE_GLOBAL_DATA_PTR;
23 * gpio_desc_init() - Initialize the GPIO descriptor
25 * @desc: GPIO descriptor to initialize
27 * @offset: Offset of device GPIO
29 static void gpio_desc_init(struct gpio_desc *desc,
34 desc->offset = offset;
39 * gpio_to_device() - Convert global GPIO number to device, number
41 * Convert the GPIO number to an entry in the list of GPIOs
42 * or GPIO blocks registered with the GPIO controller. Returns
43 * entry on success, NULL on error.
45 * @gpio: The numeric representation of the GPIO
46 * @desc: Returns description (desc->flags will always be 0)
47 * @return 0 if found, -ENOENT if not found
49 static int gpio_to_device(unsigned int gpio, struct gpio_desc *desc)
51 struct gpio_dev_priv *uc_priv;
55 for (ret = uclass_first_device(UCLASS_GPIO, &dev);
57 ret = uclass_next_device(&dev)) {
58 uc_priv = dev_get_uclass_priv(dev);
59 if (gpio >= uc_priv->gpio_base &&
60 gpio < uc_priv->gpio_base + uc_priv->gpio_count) {
61 gpio_desc_init(desc, dev, gpio - uc_priv->gpio_base);
67 return ret ? ret : -ENOENT;
70 int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc)
72 struct gpio_dev_priv *uc_priv = NULL;
78 numeric = isdigit(*name) ? simple_strtoul(name, NULL, 10) : -1;
79 for (ret = uclass_first_device(UCLASS_GPIO, &dev);
81 ret = uclass_next_device(&dev)) {
84 uc_priv = dev_get_uclass_priv(dev);
86 offset = numeric - uc_priv->gpio_base;
87 /* Allow GPIOs to be numbered from 0 */
88 if (offset < uc_priv->gpio_count)
92 len = uc_priv->bank_name ? strlen(uc_priv->bank_name) : 0;
94 if (!strncasecmp(name, uc_priv->bank_name, len)) {
95 if (!strict_strtoul(name + len, 10, &offset))
101 return ret ? ret : -EINVAL;
103 gpio_desc_init(desc, dev, offset);
108 int gpio_lookup_name(const char *name, struct udevice **devp,
109 unsigned int *offsetp, unsigned int *gpiop)
111 struct gpio_desc desc;
116 ret = dm_gpio_lookup_name(name, &desc);
123 *offsetp = desc.offset;
125 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(desc.dev);
127 *gpiop = uc_priv->gpio_base + desc.offset;
133 int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
134 struct ofnode_phandle_args *args)
136 if (args->args_count < 1)
139 desc->offset = args->args[0];
141 if (args->args_count < 2)
145 if (args->args[1] & GPIO_ACTIVE_LOW)
146 desc->flags |= GPIOD_ACTIVE_LOW;
149 * need to test 2 bits for gpio output binding:
150 * OPEN_DRAIN (0x6) = SINGLE_ENDED (0x2) | LINE_OPEN_DRAIN (0x4)
151 * OPEN_SOURCE (0x2) = SINGLE_ENDED (0x2) | LINE_OPEN_SOURCE (0x0)
153 if (args->args[1] & GPIO_SINGLE_ENDED) {
154 if (args->args[1] & GPIO_LINE_OPEN_DRAIN)
155 desc->flags |= GPIOD_OPEN_DRAIN;
157 desc->flags |= GPIOD_OPEN_SOURCE;
160 if (args->args[1] & GPIO_PULL_UP)
161 desc->flags |= GPIOD_PULL_UP;
163 if (args->args[1] & GPIO_PULL_DOWN)
164 desc->flags |= GPIOD_PULL_DOWN;
169 static int gpio_find_and_xlate(struct gpio_desc *desc,
170 struct ofnode_phandle_args *args)
172 struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
175 return ops->xlate(desc->dev, desc, args);
177 return gpio_xlate_offs_flags(desc->dev, desc, args);
180 #if defined(CONFIG_GPIO_HOG)
182 struct gpio_hog_priv {
183 struct gpio_desc gpiod;
186 struct gpio_hog_data {
192 static int gpio_hog_ofdata_to_platdata(struct udevice *dev)
194 struct gpio_hog_data *plat = dev_get_platdata(dev);
195 const char *nodename;
199 if (dev_read_bool(dev, "input")) {
200 plat->gpiod_flags = GPIOD_IS_IN;
201 } else if (dev_read_bool(dev, "output-high")) {
203 plat->gpiod_flags = GPIOD_IS_OUT;
204 } else if (dev_read_bool(dev, "output-low")) {
205 plat->gpiod_flags = GPIOD_IS_OUT;
207 printf("%s: missing gpio-hog state.\n", __func__);
210 ret = dev_read_u32_array(dev, "gpios", plat->val, 2);
212 printf("%s: wrong gpios property, 2 values needed %d\n",
216 nodename = dev_read_string(dev, "line-name");
218 device_set_name(dev, nodename);
223 static int gpio_hog_probe(struct udevice *dev)
225 struct gpio_hog_data *plat = dev_get_platdata(dev);
226 struct gpio_hog_priv *priv = dev_get_priv(dev);
229 ret = gpio_dev_request_index(dev->parent, dev->name, "gpio-hog",
230 plat->val[0], plat->gpiod_flags,
231 plat->val[1], &priv->gpiod);
233 debug("%s: node %s could not get gpio.\n", __func__,
238 if (plat->gpiod_flags == GPIOD_IS_OUT) {
239 ret = dm_gpio_set_value(&priv->gpiod, plat->value);
241 debug("%s: node %s could not set gpio.\n", __func__,
250 int gpio_hog_probe_all(void)
256 for (uclass_first_device(UCLASS_NOP, &dev);
258 uclass_find_next_device(&dev)) {
259 if (dev->driver == DM_GET_DRIVER(gpio_hog)) {
260 ret = device_probe(dev);
262 printf("Failed to probe device %s err: %d\n",
272 int gpio_hog_lookup_name(const char *name, struct gpio_desc **desc)
277 gpio_hog_probe_all();
278 if (!uclass_get_device_by_name(UCLASS_NOP, name, &dev)) {
279 struct gpio_hog_priv *priv = dev_get_priv(dev);
281 *desc = &priv->gpiod;
288 U_BOOT_DRIVER(gpio_hog) = {
291 .ofdata_to_platdata = gpio_hog_ofdata_to_platdata,
292 .probe = gpio_hog_probe,
293 .priv_auto_alloc_size = sizeof(struct gpio_hog_priv),
294 .platdata_auto_alloc_size = sizeof(struct gpio_hog_data),
297 int gpio_hog_lookup_name(const char *name, struct gpio_desc **desc)
303 int dm_gpio_request(struct gpio_desc *desc, const char *label)
305 struct udevice *dev = desc->dev;
306 struct gpio_dev_priv *uc_priv;
310 uc_priv = dev_get_uclass_priv(dev);
311 if (uc_priv->name[desc->offset])
316 if (gpio_get_ops(dev)->request) {
317 ret = gpio_get_ops(dev)->request(dev, desc->offset, label);
323 uc_priv->name[desc->offset] = str;
328 static int dm_gpio_requestf(struct gpio_desc *desc, const char *fmt, ...)
330 #if !defined(CONFIG_SPL_BUILD) || !CONFIG_IS_ENABLED(USE_TINY_PRINTF)
335 vscnprintf(buf, sizeof(buf), fmt, args);
337 return dm_gpio_request(desc, buf);
339 return dm_gpio_request(desc, fmt);
344 * gpio_request() - [COMPAT] Request GPIO
346 * label: Name for the requested GPIO
348 * The label is copied and allocated so the caller does not need to keep
349 * the pointer around.
351 * This function implements the API that's compatible with current
352 * GPIO API used in U-Boot. The request is forwarded to particular
353 * GPIO driver. Returns 0 on success, negative value on error.
355 int gpio_request(unsigned gpio, const char *label)
357 struct gpio_desc desc;
360 ret = gpio_to_device(gpio, &desc);
364 return dm_gpio_request(&desc, label);
368 * gpio_requestf() - [COMPAT] Request GPIO
370 * @fmt: Format string for the requested GPIO
371 * @...: Arguments for the printf() format string
373 * This function implements the API that's compatible with current
374 * GPIO API used in U-Boot. The request is forwarded to particular
375 * GPIO driver. Returns 0 on success, negative value on error.
377 int gpio_requestf(unsigned gpio, const char *fmt, ...)
379 #if !defined(CONFIG_SPL_BUILD) || !CONFIG_IS_ENABLED(USE_TINY_PRINTF)
384 vscnprintf(buf, sizeof(buf), fmt, args);
386 return gpio_request(gpio, buf);
388 return gpio_request(gpio, fmt);
392 int _dm_gpio_free(struct udevice *dev, uint offset)
394 struct gpio_dev_priv *uc_priv;
397 uc_priv = dev_get_uclass_priv(dev);
398 if (!uc_priv->name[offset])
400 if (gpio_get_ops(dev)->rfree) {
401 ret = gpio_get_ops(dev)->rfree(dev, offset);
406 free(uc_priv->name[offset]);
407 uc_priv->name[offset] = NULL;
413 * gpio_free() - [COMPAT] Relinquish GPIO
416 * This function implements the API that's compatible with current
417 * GPIO API used in U-Boot. The request is forwarded to particular
418 * GPIO driver. Returns 0 on success, negative value on error.
420 int gpio_free(unsigned gpio)
422 struct gpio_desc desc;
425 ret = gpio_to_device(gpio, &desc);
429 return _dm_gpio_free(desc.dev, desc.offset);
432 static int check_reserved(const struct gpio_desc *desc, const char *func)
434 struct gpio_dev_priv *uc_priv;
436 if (!dm_gpio_is_valid(desc))
439 uc_priv = dev_get_uclass_priv(desc->dev);
440 if (!uc_priv->name[desc->offset]) {
441 printf("%s: %s: error: gpio %s%d not reserved\n",
442 desc->dev->name, func,
443 uc_priv->bank_name ? uc_priv->bank_name : "",
452 * gpio_direction_input() - [COMPAT] Set GPIO direction to input
455 * This function implements the API that's compatible with current
456 * GPIO API used in U-Boot. The request is forwarded to particular
457 * GPIO driver. Returns 0 on success, negative value on error.
459 int gpio_direction_input(unsigned gpio)
461 struct gpio_desc desc;
464 ret = gpio_to_device(gpio, &desc);
467 ret = check_reserved(&desc, "dir_input");
471 return gpio_get_ops(desc.dev)->direction_input(desc.dev, desc.offset);
475 * gpio_direction_output() - [COMPAT] Set GPIO direction to output and set value
477 * value: Logical value to be set on the GPIO pin
479 * This function implements the API that's compatible with current
480 * GPIO API used in U-Boot. The request is forwarded to particular
481 * GPIO driver. Returns 0 on success, negative value on error.
483 int gpio_direction_output(unsigned gpio, int value)
485 struct gpio_desc desc;
488 ret = gpio_to_device(gpio, &desc);
491 ret = check_reserved(&desc, "dir_output");
495 return gpio_get_ops(desc.dev)->direction_output(desc.dev,
499 static int _gpio_get_value(const struct gpio_desc *desc)
503 value = gpio_get_ops(desc->dev)->get_value(desc->dev, desc->offset);
505 return desc->flags & GPIOD_ACTIVE_LOW ? !value : value;
508 int dm_gpio_get_value(const struct gpio_desc *desc)
512 ret = check_reserved(desc, "get_value");
516 return _gpio_get_value(desc);
519 int dm_gpio_set_value(const struct gpio_desc *desc, int value)
523 ret = check_reserved(desc, "set_value");
527 if (desc->flags & GPIOD_ACTIVE_LOW)
529 gpio_get_ops(desc->dev)->set_value(desc->dev, desc->offset, value);
533 /* check dir flags invalid configuration */
534 static int check_dir_flags(ulong flags)
536 if ((flags & GPIOD_IS_OUT) && (flags & GPIOD_IS_IN)) {
537 log_debug("%s: flags 0x%lx has GPIOD_IS_OUT and GPIOD_IS_IN\n",
542 if ((flags & GPIOD_PULL_UP) && (flags & GPIOD_PULL_DOWN)) {
543 log_debug("%s: flags 0x%lx has GPIOD_PULL_UP and GPIOD_PULL_DOWN\n",
548 if ((flags & GPIOD_OPEN_DRAIN) && (flags & GPIOD_OPEN_SOURCE)) {
549 log_debug("%s: flags 0x%lx has GPIOD_OPEN_DRAIN and GPIOD_OPEN_SOURCE\n",
557 static int _dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
559 struct udevice *dev = desc->dev;
560 struct dm_gpio_ops *ops = gpio_get_ops(dev);
561 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
564 ret = check_dir_flags(flags);
567 "%s error: set_dir_flags for gpio %s%d has invalid dir flags 0x%lx\n",
569 uc_priv->bank_name ? uc_priv->bank_name : "",
570 desc->offset, flags);
575 /* GPIOD_ are directly managed by driver in set_dir_flags*/
576 if (ops->set_dir_flags) {
577 ret = ops->set_dir_flags(dev, desc->offset, flags);
579 if (flags & GPIOD_IS_OUT) {
580 ret = ops->direction_output(dev, desc->offset,
581 GPIOD_FLAGS_OUTPUT(flags));
582 } else if (flags & GPIOD_IS_IN) {
583 ret = ops->direction_input(dev, desc->offset);
590 int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
594 ret = check_reserved(desc, "set_dir_flags");
598 /* combine the requested flags (for IN/OUT) and the descriptor flags */
599 flags |= desc->flags;
600 ret = _dm_gpio_set_dir_flags(desc, flags);
602 /* update the descriptor flags */
609 int dm_gpio_set_dir(struct gpio_desc *desc)
613 ret = check_reserved(desc, "set_dir");
617 return _dm_gpio_set_dir_flags(desc, desc->flags);
620 int dm_gpio_get_dir_flags(struct gpio_desc *desc, ulong *flags)
622 struct udevice *dev = desc->dev;
624 struct dm_gpio_ops *ops = gpio_get_ops(dev);
627 ret = check_reserved(desc, "get_dir_flags");
631 /* GPIOD_ are directly provided by driver except GPIOD_ACTIVE_LOW */
632 if (ops->get_dir_flags) {
633 ret = ops->get_dir_flags(dev, desc->offset, &dir_flags);
637 /* GPIOD_ACTIVE_LOW is saved in desc->flags */
638 value = dir_flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0;
639 if (desc->flags & GPIOD_ACTIVE_LOW)
641 dir_flags &= ~(GPIOD_ACTIVE_LOW | GPIOD_IS_OUT_ACTIVE);
642 dir_flags |= (desc->flags & GPIOD_ACTIVE_LOW);
644 dir_flags |= GPIOD_IS_OUT_ACTIVE;
646 dir_flags = desc->flags;
647 /* only GPIOD_IS_OUT_ACTIVE is provided by uclass */
648 dir_flags &= ~GPIOD_IS_OUT_ACTIVE;
649 if ((desc->flags & GPIOD_IS_OUT) && _gpio_get_value(desc))
650 dir_flags |= GPIOD_IS_OUT_ACTIVE;
658 * gpio_get_value() - [COMPAT] Sample GPIO pin and return it's value
661 * This function implements the API that's compatible with current
662 * GPIO API used in U-Boot. The request is forwarded to particular
663 * GPIO driver. Returns the value of the GPIO pin, or negative value
666 int gpio_get_value(unsigned gpio)
670 struct gpio_desc desc;
672 ret = gpio_to_device(gpio, &desc);
675 return dm_gpio_get_value(&desc);
679 * gpio_set_value() - [COMPAT] Configure logical value on GPIO pin
681 * value: Logical value to be set on the GPIO pin.
683 * This function implements the API that's compatible with current
684 * GPIO API used in U-Boot. The request is forwarded to particular
685 * GPIO driver. Returns 0 on success, negative value on error.
687 int gpio_set_value(unsigned gpio, int value)
689 struct gpio_desc desc;
692 ret = gpio_to_device(gpio, &desc);
695 return dm_gpio_set_value(&desc, value);
698 const char *gpio_get_bank_info(struct udevice *dev, int *bit_count)
700 struct gpio_dev_priv *priv;
702 /* Must be called on an active device */
703 priv = dev_get_uclass_priv(dev);
706 *bit_count = priv->gpio_count;
707 return priv->bank_name;
710 static const char * const gpio_function[GPIOF_COUNT] = {
718 static int get_function(struct udevice *dev, int offset, bool skip_unused,
721 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
722 struct dm_gpio_ops *ops = gpio_get_ops(dev);
724 BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function));
725 if (!device_active(dev))
727 if (offset < 0 || offset >= uc_priv->gpio_count)
730 *namep = uc_priv->name[offset];
731 if (skip_unused && !uc_priv->name[offset])
733 if (ops->get_function) {
736 ret = ops->get_function(dev, offset);
739 if (ret >= ARRAY_SIZE(gpio_function))
744 return GPIOF_UNKNOWN;
747 int gpio_get_function(struct udevice *dev, int offset, const char **namep)
749 return get_function(dev, offset, true, namep);
752 int gpio_get_raw_function(struct udevice *dev, int offset, const char **namep)
754 return get_function(dev, offset, false, namep);
757 int gpio_get_status(struct udevice *dev, int offset, char *buf, int buffsize)
759 struct dm_gpio_ops *ops = gpio_get_ops(dev);
760 struct gpio_dev_priv *priv;
766 BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function));
769 priv = dev_get_uclass_priv(dev);
770 ret = gpio_get_raw_function(dev, offset, NULL);
774 len = snprintf(str, buffsize, "%s%d: %s",
775 priv->bank_name ? priv->bank_name : "",
776 offset, gpio_function[func]);
777 if (func == GPIOF_INPUT || func == GPIOF_OUTPUT ||
778 func == GPIOF_UNUSED) {
782 ret = ops->get_value(dev, offset);
785 used = gpio_get_function(dev, offset, &label) != GPIOF_UNUSED;
786 snprintf(str + len, buffsize - len, ": %d [%c]%s%s",
796 int gpio_claim_vector(const int *gpio_num_array, const char *fmt)
801 for (i = 0; i < 32; i++) {
802 gpio = gpio_num_array[i];
805 ret = gpio_requestf(gpio, fmt, i);
808 ret = gpio_direction_input(gpio);
817 for (i--; i >= 0; i--)
818 gpio_free(gpio_num_array[i]);
824 * get a number comprised of multiple GPIO values. gpio_num_array points to
825 * the array of gpio pin numbers to scan, terminated by -1.
827 int gpio_get_values_as_int(const int *gpio_list)
830 unsigned bitmask = 1;
835 ((gpio = *gpio_list++) != -1)) {
836 ret = gpio_get_value(gpio);
847 int dm_gpio_get_values_as_int(const struct gpio_desc *desc_list, int count)
849 unsigned bitmask = 1;
853 for (i = 0; i < count; i++) {
854 ret = dm_gpio_get_value(&desc_list[i]);
866 * gpio_request_tail: common work for requesting a gpio.
868 * ret: return value from previous work in function which calls
870 * This seems bogus (why calling this function instead not
871 * calling it and end caller function instead?).
872 * Because on error in caller function we want to set some
873 * default values in gpio desc and have a common error
874 * debug message, which provides this function.
875 * nodename: Name of node for which gpio gets requested
876 * used for gpio label name.
877 * args: pointer to output arguments structure
878 * list_name: Name of GPIO list
879 * used for gpio label name.
880 * index: gpio index in gpio list
881 * used for gpio label name.
882 * desc: pointer to gpio descriptor, filled from this
884 * flags: gpio flags to use.
885 * add_index: should index added to gpio label name
886 * gpio_dev: pointer to gpio device from which the gpio
887 * will be requested. If NULL try to get the
888 * gpio device with uclass_get_device_by_ofnode()
890 * return: In error case this function sets default values in
891 * gpio descriptor, also emmits a debug message.
892 * On success it returns 0 else the error code from
893 * function calls, or the error code passed through
894 * ret to this function.
897 static int gpio_request_tail(int ret, const char *nodename,
898 struct ofnode_phandle_args *args,
899 const char *list_name, int index,
900 struct gpio_desc *desc, int flags,
901 bool add_index, struct udevice *gpio_dev)
903 gpio_desc_init(desc, gpio_dev, 0);
908 ret = uclass_get_device_by_ofnode(UCLASS_GPIO, args->node,
911 debug("%s: uclass_get_device_by_ofnode failed\n",
916 ret = gpio_find_and_xlate(desc, args);
918 debug("%s: gpio_find_and_xlate failed\n", __func__);
921 ret = dm_gpio_requestf(desc, add_index ? "%s.%s%d" : "%s.%s",
922 nodename, list_name, index);
924 debug("%s: dm_gpio_requestf failed\n", __func__);
927 ret = dm_gpio_set_dir_flags(desc, flags);
929 debug("%s: dm_gpio_set_dir failed\n", __func__);
935 debug("%s: Node '%s', property '%s', failed to request GPIO index %d: %d\n",
936 __func__, nodename, list_name, index, ret);
940 static int _gpio_request_by_name_nodev(ofnode node, const char *list_name,
941 int index, struct gpio_desc *desc,
942 int flags, bool add_index)
944 struct ofnode_phandle_args args;
947 ret = ofnode_parse_phandle_with_args(node, list_name, "#gpio-cells", 0,
950 return gpio_request_tail(ret, ofnode_get_name(node), &args, list_name,
951 index, desc, flags, add_index, NULL);
954 int gpio_request_by_name_nodev(ofnode node, const char *list_name, int index,
955 struct gpio_desc *desc, int flags)
957 return _gpio_request_by_name_nodev(node, list_name, index, desc, flags,
961 int gpio_request_by_name(struct udevice *dev, const char *list_name, int index,
962 struct gpio_desc *desc, int flags)
964 struct ofnode_phandle_args args;
968 ret = dev_read_phandle_with_args(dev, list_name, "#gpio-cells", 0,
970 node = dev_ofnode(dev);
971 return gpio_request_tail(ret, ofnode_get_name(node), &args, list_name,
972 index, desc, flags, index > 0, NULL);
975 int gpio_request_list_by_name_nodev(ofnode node, const char *list_name,
976 struct gpio_desc *desc, int max_count,
982 for (count = 0; count < max_count; count++) {
983 ret = _gpio_request_by_name_nodev(node, list_name, count,
984 &desc[count], flags, true);
991 /* We ran out of GPIOs in the list */
995 gpio_free_list_nodev(desc, count - 1);
1000 int gpio_request_list_by_name(struct udevice *dev, const char *list_name,
1001 struct gpio_desc *desc, int max_count,
1005 * This isn't ideal since we don't use dev->name in the debug()
1006 * calls in gpio_request_by_name(), but we can do this until
1007 * gpio_request_list_by_name_nodev() can be dropped.
1009 return gpio_request_list_by_name_nodev(dev_ofnode(dev), list_name, desc,
1013 int gpio_get_list_count(struct udevice *dev, const char *list_name)
1017 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
1018 list_name, "#gpio-cells", 0, -1,
1021 debug("%s: Node '%s', property '%s', GPIO count failed: %d\n",
1022 __func__, dev->name, list_name, ret);
1028 int dm_gpio_free(struct udevice *dev, struct gpio_desc *desc)
1030 /* For now, we don't do any checking of dev */
1031 return _dm_gpio_free(desc->dev, desc->offset);
1034 int gpio_free_list(struct udevice *dev, struct gpio_desc *desc, int count)
1038 /* For now, we don't do any checking of dev */
1039 for (i = 0; i < count; i++)
1040 dm_gpio_free(dev, &desc[i]);
1045 int gpio_free_list_nodev(struct gpio_desc *desc, int count)
1047 return gpio_free_list(NULL, desc, count);
1050 /* We need to renumber the GPIOs when any driver is probed/removed */
1051 static int gpio_renumber(struct udevice *removed_dev)
1053 struct gpio_dev_priv *uc_priv;
1054 struct udevice *dev;
1059 ret = uclass_get(UCLASS_GPIO, &uc);
1063 /* Ensure that we have a base for each bank */
1065 uclass_foreach_dev(dev, uc) {
1066 if (device_active(dev) && dev != removed_dev) {
1067 uc_priv = dev_get_uclass_priv(dev);
1068 uc_priv->gpio_base = base;
1069 base += uc_priv->gpio_count;
1076 int gpio_get_number(const struct gpio_desc *desc)
1078 struct udevice *dev = desc->dev;
1079 struct gpio_dev_priv *uc_priv;
1083 uc_priv = dev->uclass_priv;
1085 return uc_priv->gpio_base + desc->offset;
1088 static int gpio_post_probe(struct udevice *dev)
1090 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
1092 uc_priv->name = calloc(uc_priv->gpio_count, sizeof(char *));
1096 return gpio_renumber(NULL);
1099 static int gpio_pre_remove(struct udevice *dev)
1101 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
1104 for (i = 0; i < uc_priv->gpio_count; i++) {
1105 if (uc_priv->name[i])
1106 free(uc_priv->name[i]);
1108 free(uc_priv->name);
1110 return gpio_renumber(dev);
1113 int gpio_dev_request_index(struct udevice *dev, const char *nodename,
1114 char *list_name, int index, int flags,
1115 int dtflags, struct gpio_desc *desc)
1117 struct ofnode_phandle_args args;
1119 args.node = ofnode_null();
1120 args.args_count = 2;
1121 args.args[0] = index;
1122 args.args[1] = dtflags;
1124 return gpio_request_tail(0, nodename, &args, list_name, index, desc,
1128 static int gpio_post_bind(struct udevice *dev)
1130 struct udevice *child;
1133 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1134 struct dm_gpio_ops *ops = (struct dm_gpio_ops *)device_get_ops(dev);
1135 static int reloc_done;
1139 ops->request += gd->reloc_off;
1141 ops->rfree += gd->reloc_off;
1142 if (ops->direction_input)
1143 ops->direction_input += gd->reloc_off;
1144 if (ops->direction_output)
1145 ops->direction_output += gd->reloc_off;
1147 ops->get_value += gd->reloc_off;
1149 ops->set_value += gd->reloc_off;
1150 if (ops->get_function)
1151 ops->get_function += gd->reloc_off;
1153 ops->xlate += gd->reloc_off;
1154 if (ops->set_dir_flags)
1155 ops->set_dir_flags += gd->reloc_off;
1156 if (ops->get_dir_flags)
1157 ops->get_dir_flags += gd->reloc_off;
1163 if (IS_ENABLED(CONFIG_GPIO_HOG)) {
1164 dev_for_each_subnode(node, dev) {
1165 if (ofnode_read_bool(node, "gpio-hog")) {
1166 const char *name = ofnode_get_name(node);
1169 ret = device_bind_driver_to_node(dev,
1181 UCLASS_DRIVER(gpio) = {
1184 .flags = DM_UC_FLAG_SEQ_ALIAS,
1185 .post_probe = gpio_post_probe,
1186 .post_bind = gpio_post_bind,
1187 .pre_remove = gpio_pre_remove,
1188 .per_device_auto_alloc_size = sizeof(struct gpio_dev_priv),