Lines Matching +full:gpio +full:- +full:mux
1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2011-2012 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson
7 * Based on bits of regulator core, gpio core and clk core
23 #include <linux/radix-tree.h>
37 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pinmux_check_ops()
43 !ops->get_functions_count || in pinmux_check_ops()
44 !ops->get_function_name || in pinmux_check_ops()
45 !ops->get_function_groups || in pinmux_check_ops()
46 !ops->set_mux) { in pinmux_check_ops()
47 dev_err(pctldev->dev, "pinmux ops lacks necessary functions\n"); in pinmux_check_ops()
48 return -EINVAL; in pinmux_check_ops()
51 nfuncs = ops->get_functions_count(pctldev); in pinmux_check_ops()
53 const char *fname = ops->get_function_name(pctldev, in pinmux_check_ops()
56 dev_err(pctldev->dev, "pinmux ops has no name for function%u\n", in pinmux_check_ops()
58 return -EINVAL; in pinmux_check_ops()
68 if (!map->data.mux.function) { in pinmux_validate_map()
70 map->name, i); in pinmux_validate_map()
71 return -EINVAL; in pinmux_validate_map()
78 * pinmux_can_be_used_for_gpio() - check if a specific pin
79 * is either muxed to a different function or used as gpio.
85 * menaning that the gpio can be used.
90 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pinmux_can_be_used_for_gpio()
96 if (ops->strict && desc->mux_usecount) in pinmux_can_be_used_for_gpio()
99 return !(ops->strict && !!desc->gpio_owner); in pinmux_can_be_used_for_gpio()
103 * pin_request() - request a single pin to be muxed in, typically for GPIO
107 * name that controls its mux function, or the requested GPIO name
108 * @gpio_range: the range matching the GPIO pin if this is a request for a
109 * single GPIO pin
116 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pin_request()
117 int status = -EINVAL; in pin_request()
121 dev_err(pctldev->dev, in pin_request()
127 dev_dbg(pctldev->dev, "request pin %d (%s) for %s\n", in pin_request()
128 pin, desc->name, owner); in pin_request()
130 if ((!gpio_range || ops->strict) && in pin_request()
131 desc->mux_usecount && strcmp(desc->mux_owner, owner)) { in pin_request()
132 dev_err(pctldev->dev, in pin_request()
134 desc->name, desc->mux_owner, owner); in pin_request()
138 if ((gpio_range || ops->strict) && desc->gpio_owner) { in pin_request()
139 dev_err(pctldev->dev, in pin_request()
141 desc->name, desc->gpio_owner, owner); in pin_request()
146 desc->gpio_owner = owner; in pin_request()
148 desc->mux_usecount++; in pin_request()
149 if (desc->mux_usecount > 1) in pin_request()
152 desc->mux_owner = owner; in pin_request()
156 if (!try_module_get(pctldev->owner)) { in pin_request()
157 dev_err(pctldev->dev, in pin_request()
160 status = -EINVAL; in pin_request()
168 if (gpio_range && ops->gpio_request_enable) in pin_request()
169 /* This requests and enables a single GPIO pin */ in pin_request()
170 status = ops->gpio_request_enable(pctldev, gpio_range, pin); in pin_request()
171 else if (ops->request) in pin_request()
172 status = ops->request(pctldev, pin); in pin_request()
177 module_put(pctldev->owner); in pin_request()
182 desc->gpio_owner = NULL; in pin_request()
184 desc->mux_usecount--; in pin_request()
185 if (!desc->mux_usecount) in pin_request()
186 desc->mux_owner = NULL; in pin_request()
191 dev_err(pctldev->dev, "pin-%d (%s) status %d\n", in pin_request()
198 * pin_free() - release a single muxed in pin so something else can be muxed
201 * @gpio_range: the range matching the GPIO pin if this is a request for a
202 * single GPIO pin
206 * once the pin is free. This is done for GPIO request functions.
211 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pin_free()
217 dev_err(pctldev->dev, in pin_free()
226 if (WARN_ON(!desc->mux_usecount)) in pin_free()
228 desc->mux_usecount--; in pin_free()
229 if (desc->mux_usecount) in pin_free()
237 if (gpio_range && ops->gpio_disable_free) in pin_free()
238 ops->gpio_disable_free(pctldev, gpio_range, pin); in pin_free()
239 else if (ops->free) in pin_free()
240 ops->free(pctldev, pin); in pin_free()
243 owner = desc->gpio_owner; in pin_free()
244 desc->gpio_owner = NULL; in pin_free()
246 owner = desc->mux_owner; in pin_free()
247 desc->mux_owner = NULL; in pin_free()
248 desc->mux_setting = NULL; in pin_free()
251 module_put(pctldev->owner); in pin_free()
257 * pinmux_request_gpio() - request pinmuxing for a GPIO pin
259 * @pin: the pin to mux in for GPIO
260 * @range: the applicable GPIO range
261 * @gpio: number of requested GPIO
265 unsigned int pin, unsigned int gpio) in pinmux_request_gpio() argument
271 owner = kasprintf(GFP_KERNEL, "%s:%d", range->name, gpio); in pinmux_request_gpio()
273 return -ENOMEM; in pinmux_request_gpio()
283 * pinmux_free_gpio() - release a pin from GPIO muxing
285 * @pin: the affected currently GPIO-muxed in pin
286 * @range: applicable GPIO range
298 * pinmux_gpio_direction() - set the direction of a single muxed-in GPIO pin
300 * @range: applicable GPIO range
301 * @pin: the affected GPIO pin in this controller
311 ops = pctldev->desc->pmxops; in pinmux_gpio_direction()
313 if (ops->gpio_set_direction) in pinmux_gpio_direction()
314 ret = ops->gpio_set_direction(pctldev, range, pin, input); in pinmux_gpio_direction()
324 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pinmux_func_name_to_selector()
325 unsigned int nfuncs = ops->get_functions_count(pctldev); in pinmux_func_name_to_selector()
330 const char *fname = ops->get_function_name(pctldev, selector); in pinmux_func_name_to_selector()
338 return -EINVAL; in pinmux_func_name_to_selector()
344 struct pinctrl_dev *pctldev = setting->pctldev; in pinmux_map_to_setting()
345 const struct pinmux_ops *pmxops = pctldev->desc->pmxops; in pinmux_map_to_setting()
352 dev_err(pctldev->dev, "does not support mux function\n"); in pinmux_map_to_setting()
353 return -EINVAL; in pinmux_map_to_setting()
356 ret = pinmux_func_name_to_selector(pctldev, map->data.mux.function); in pinmux_map_to_setting()
358 dev_err(pctldev->dev, "invalid function %s in map table\n", in pinmux_map_to_setting()
359 map->data.mux.function); in pinmux_map_to_setting()
362 setting->data.mux.func = ret; in pinmux_map_to_setting()
364 ret = pmxops->get_function_groups(pctldev, setting->data.mux.func, in pinmux_map_to_setting()
367 dev_err(pctldev->dev, "can't query groups for function %s\n", in pinmux_map_to_setting()
368 map->data.mux.function); in pinmux_map_to_setting()
372 dev_err(pctldev->dev, in pinmux_map_to_setting()
374 map->data.mux.function); in pinmux_map_to_setting()
375 return -EINVAL; in pinmux_map_to_setting()
377 if (map->data.mux.group) { in pinmux_map_to_setting()
378 group = map->data.mux.group; in pinmux_map_to_setting()
381 dev_err(pctldev->dev, in pinmux_map_to_setting()
383 group, map->data.mux.function); in pinmux_map_to_setting()
392 dev_err(pctldev->dev, "invalid group %s in map table\n", in pinmux_map_to_setting()
393 map->data.mux.group); in pinmux_map_to_setting()
396 setting->data.mux.group = ret; in pinmux_map_to_setting()
408 struct pinctrl_dev *pctldev = setting->pctldev; in pinmux_enable_setting()
409 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; in pinmux_enable_setting()
410 const struct pinmux_ops *ops = pctldev->desc->pmxops; in pinmux_enable_setting()
417 if (pctlops->get_group_pins) in pinmux_enable_setting()
418 ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, in pinmux_enable_setting()
425 gname = pctlops->get_group_name(pctldev, in pinmux_enable_setting()
426 setting->data.mux.group); in pinmux_enable_setting()
427 dev_warn(pctldev->dev, in pinmux_enable_setting()
435 ret = pin_request(pctldev, pins[i], setting->dev_name, NULL); in pinmux_enable_setting()
441 pname = desc ? desc->name : "non-existing"; in pinmux_enable_setting()
442 gname = pctlops->get_group_name(pctldev, in pinmux_enable_setting()
443 setting->data.mux.group); in pinmux_enable_setting()
444 dev_err(pctldev->dev, in pinmux_enable_setting()
453 /* Now that we have acquired the pins, encode the mux setting */ in pinmux_enable_setting()
457 dev_warn(pctldev->dev, in pinmux_enable_setting()
462 desc->mux_setting = &(setting->data.mux); in pinmux_enable_setting()
465 ret = ops->set_mux(pctldev, setting->data.mux.func, in pinmux_enable_setting()
466 setting->data.mux.group); in pinmux_enable_setting()
477 desc->mux_setting = NULL; in pinmux_enable_setting()
481 while (--i >= 0) in pinmux_enable_setting()
489 struct pinctrl_dev *pctldev = setting->pctldev; in pinmux_disable_setting()
490 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; in pinmux_disable_setting()
497 if (pctlops->get_group_pins) in pinmux_disable_setting()
498 ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, in pinmux_disable_setting()
504 gname = pctlops->get_group_name(pctldev, in pinmux_disable_setting()
505 setting->data.mux.group); in pinmux_disable_setting()
506 dev_warn(pctldev->dev, in pinmux_disable_setting()
516 dev_warn(pctldev->dev, in pinmux_disable_setting()
521 if (desc->mux_setting == &(setting->data.mux)) { in pinmux_disable_setting()
526 gname = pctlops->get_group_name(pctldev, in pinmux_disable_setting()
527 setting->data.mux.group); in pinmux_disable_setting()
528 dev_warn(pctldev->dev, in pinmux_disable_setting()
530 "deactivating group %s - it is already " in pinmux_disable_setting()
532 pins[i], desc->name, gname); in pinmux_disable_setting()
542 struct pinctrl_dev *pctldev = s->private; in pinmux_functions_show()
543 const struct pinmux_ops *pmxops = pctldev->desc->pmxops; in pinmux_functions_show()
550 mutex_lock(&pctldev->mutex); in pinmux_functions_show()
551 nfuncs = pmxops->get_functions_count(pctldev); in pinmux_functions_show()
553 const char *func = pmxops->get_function_name(pctldev, in pinmux_functions_show()
560 ret = pmxops->get_function_groups(pctldev, func_selector, in pinmux_functions_show()
577 mutex_unlock(&pctldev->mutex); in pinmux_functions_show()
584 struct pinctrl_dev *pctldev = s->private; in pinmux_pins_show()
585 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; in pinmux_pins_show()
586 const struct pinmux_ops *pmxops = pctldev->desc->pmxops; in pinmux_pins_show()
593 if (pmxops->strict) in pinmux_pins_show()
600 mutex_lock(&pctldev->mutex); in pinmux_pins_show()
603 for (i = 0; i < pctldev->desc->npins; i++) { in pinmux_pins_show()
607 pin = pctldev->desc->pins[i].number; in pinmux_pins_show()
613 if (desc->mux_owner && in pinmux_pins_show()
614 !strcmp(desc->mux_owner, pinctrl_dev_get_name(pctldev))) in pinmux_pins_show()
617 if (pmxops->strict) { in pinmux_pins_show()
618 if (desc->mux_owner) in pinmux_pins_show()
620 pin, desc->name, desc->mux_owner, in pinmux_pins_show()
622 else if (desc->gpio_owner) in pinmux_pins_show()
623 seq_printf(s, "pin %d (%s): GPIO %s", in pinmux_pins_show()
624 pin, desc->name, desc->gpio_owner); in pinmux_pins_show()
627 pin, desc->name); in pinmux_pins_show()
629 /* For non-strict controllers */ in pinmux_pins_show()
630 seq_printf(s, "pin %d (%s): %s %s%s", pin, desc->name, in pinmux_pins_show()
631 desc->mux_owner ? desc->mux_owner in pinmux_pins_show()
632 : "(MUX UNCLAIMED)", in pinmux_pins_show()
633 desc->gpio_owner ? desc->gpio_owner in pinmux_pins_show()
634 : "(GPIO UNCLAIMED)", in pinmux_pins_show()
638 /* If mux: print function+group claiming the pin */ in pinmux_pins_show()
639 if (desc->mux_setting) in pinmux_pins_show()
641 pmxops->get_function_name(pctldev, in pinmux_pins_show()
642 desc->mux_setting->func), in pinmux_pins_show()
643 pctlops->get_group_name(pctldev, in pinmux_pins_show()
644 desc->mux_setting->group)); in pinmux_pins_show()
649 mutex_unlock(&pctldev->mutex); in pinmux_pins_show()
657 map->data.mux.group ? map->data.mux.group : "(default)", in pinmux_show_map()
658 map->data.mux.function); in pinmux_show_map()
664 struct pinctrl_dev *pctldev = setting->pctldev; in pinmux_show_setting()
665 const struct pinmux_ops *pmxops = pctldev->desc->pmxops; in pinmux_show_setting()
666 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; in pinmux_show_setting()
669 pctlops->get_group_name(pctldev, setting->data.mux.group), in pinmux_show_setting()
670 setting->data.mux.group, in pinmux_show_setting()
671 pmxops->get_function_name(pctldev, setting->data.mux.func), in pinmux_show_setting()
672 setting->data.mux.func); in pinmux_show_setting()
681 struct seq_file *sfile = file->private_data; in pinmux_select()
682 struct pinctrl_dev *pctldev = sfile->private; in pinmux_select()
683 const struct pinmux_ops *pmxops = pctldev->desc->pmxops; in pinmux_select()
696 ret = -EINVAL; in pinmux_select()
703 ret = -EINVAL; in pinmux_select()
712 ret = -EINVAL; in pinmux_select()
718 dev_err(pctldev->dev, "invalid function %s in map table\n", fname); in pinmux_select()
723 ret = pmxops->get_function_groups(pctldev, fsel, &groups, &num_groups); in pinmux_select()
725 dev_err(pctldev->dev, "no groups for function %d (%s)", fsel, fname); in pinmux_select()
731 dev_err(pctldev->dev, "invalid group %s", gname); in pinmux_select()
740 ret = pmxops->set_mux(pctldev, fsel, gsel); in pinmux_select()
742 dev_err(pctldev->dev, "set_mux() failed: %d", ret); in pinmux_select()
755 return single_open(file, NULL, inode->i_private); in pinmux_select_open()
769 debugfs_create_file("pinmux-functions", 0444, in pinmux_init_device_debugfs()
771 debugfs_create_file("pinmux-pins", 0444, in pinmux_init_device_debugfs()
773 debugfs_create_file("pinmux-select", 0200, in pinmux_init_device_debugfs()
782 * pinmux_generic_get_function_count() - returns number of functions
787 return pctldev->num_functions; in pinmux_generic_get_function_count()
792 * pinmux_generic_get_function_name() - returns the function name
802 function = radix_tree_lookup(&pctldev->pin_function_tree, in pinmux_generic_get_function_name()
807 return function->name; in pinmux_generic_get_function_name()
812 * pinmux_generic_get_function_groups() - gets the function groups
825 function = radix_tree_lookup(&pctldev->pin_function_tree, in pinmux_generic_get_function_groups()
828 dev_err(pctldev->dev, "%s could not find function%i\n", in pinmux_generic_get_function_groups()
830 return -EINVAL; in pinmux_generic_get_function_groups()
832 *groups = function->group_names; in pinmux_generic_get_function_groups()
833 *num_groups = function->num_group_names; in pinmux_generic_get_function_groups()
840 * pinmux_generic_get_function() - returns a function based on the number
849 function = radix_tree_lookup(&pctldev->pin_function_tree, in pinmux_generic_get_function()
859 * pinmux_generic_add_function() - adds a function group
876 return -EINVAL; in pinmux_generic_add_function()
882 selector = pctldev->num_functions; in pinmux_generic_add_function()
884 function = devm_kzalloc(pctldev->dev, sizeof(*function), GFP_KERNEL); in pinmux_generic_add_function()
886 return -ENOMEM; in pinmux_generic_add_function()
888 function->name = name; in pinmux_generic_add_function()
889 function->group_names = groups; in pinmux_generic_add_function()
890 function->num_group_names = num_groups; in pinmux_generic_add_function()
891 function->data = data; in pinmux_generic_add_function()
893 error = radix_tree_insert(&pctldev->pin_function_tree, selector, function); in pinmux_generic_add_function()
897 pctldev->num_functions++; in pinmux_generic_add_function()
904 * pinmux_generic_remove_function() - removes a numbered function
915 function = radix_tree_lookup(&pctldev->pin_function_tree, in pinmux_generic_remove_function()
918 return -ENOENT; in pinmux_generic_remove_function()
920 radix_tree_delete(&pctldev->pin_function_tree, selector); in pinmux_generic_remove_function()
921 devm_kfree(pctldev->dev, function); in pinmux_generic_remove_function()
923 pctldev->num_functions--; in pinmux_generic_remove_function()
930 * pinmux_generic_free_functions() - removes all functions
942 radix_tree_for_each_slot(slot, &pctldev->pin_function_tree, &iter, 0) in pinmux_generic_free_functions()
943 radix_tree_delete(&pctldev->pin_function_tree, iter.index); in pinmux_generic_free_functions()
945 pctldev->num_functions = 0; in pinmux_generic_free_functions()