Lines Matching +full:lock +full:- +full:offset
1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * Copyright (C) 2015-2016 Bamvor Jian Zhang <bamv2005@gmail.com>
37 * struct gpio_pin_status - structure describing a GPIO status
52 struct mutex lock; member
58 unsigned int offset; member
82 unsigned int offset) in __gpio_mockup_get() argument
84 return chip->lines[offset].value; in __gpio_mockup_get()
87 static int gpio_mockup_get(struct gpio_chip *gc, unsigned int offset) in gpio_mockup_get() argument
92 mutex_lock(&chip->lock); in gpio_mockup_get()
93 val = __gpio_mockup_get(chip, offset); in gpio_mockup_get()
94 mutex_unlock(&chip->lock); in gpio_mockup_get()
105 mutex_lock(&chip->lock); in gpio_mockup_get_multiple()
106 for_each_set_bit(bit, mask, gc->ngpio) { in gpio_mockup_get_multiple()
110 mutex_unlock(&chip->lock); in gpio_mockup_get_multiple()
116 unsigned int offset, int value) in __gpio_mockup_set() argument
118 chip->lines[offset].value = !!value; in __gpio_mockup_set()
122 unsigned int offset, int value) in gpio_mockup_set() argument
126 mutex_lock(&chip->lock); in gpio_mockup_set()
127 __gpio_mockup_set(chip, offset, value); in gpio_mockup_set()
128 mutex_unlock(&chip->lock); in gpio_mockup_set()
137 mutex_lock(&chip->lock); in gpio_mockup_set_multiple()
138 for_each_set_bit(bit, mask, gc->ngpio) in gpio_mockup_set_multiple()
140 mutex_unlock(&chip->lock); in gpio_mockup_set_multiple()
144 unsigned int offset, int value) in gpio_mockup_apply_pull() argument
150 gc = &chip->gc; in gpio_mockup_apply_pull()
151 desc = &gc->gpiodev->descs[offset]; in gpio_mockup_apply_pull()
153 mutex_lock(&chip->lock); in gpio_mockup_apply_pull()
155 if (test_bit(FLAG_REQUESTED, &desc->flags) && in gpio_mockup_apply_pull()
156 !test_bit(FLAG_IS_OUT, &desc->flags)) { in gpio_mockup_apply_pull()
157 curr = __gpio_mockup_get(chip, offset); in gpio_mockup_apply_pull()
161 irq = irq_find_mapping(chip->irq_sim_domain, offset); in gpio_mockup_apply_pull()
164 * This is fine - it just means, nobody is listening in gpio_mockup_apply_pull()
184 if (!test_bit(FLAG_REQUESTED, &desc->flags) || in gpio_mockup_apply_pull()
185 !test_bit(FLAG_IS_OUT, &desc->flags)) in gpio_mockup_apply_pull()
186 __gpio_mockup_set(chip, offset, value); in gpio_mockup_apply_pull()
189 chip->lines[offset].pull = value; in gpio_mockup_apply_pull()
190 mutex_unlock(&chip->lock); in gpio_mockup_apply_pull()
195 unsigned int offset, unsigned long config) in gpio_mockup_set_config() argument
201 return gpio_mockup_apply_pull(chip, offset, 1); in gpio_mockup_set_config()
203 return gpio_mockup_apply_pull(chip, offset, 0); in gpio_mockup_set_config()
207 return -ENOTSUPP; in gpio_mockup_set_config()
211 unsigned int offset, int value) in gpio_mockup_dirout() argument
215 mutex_lock(&chip->lock); in gpio_mockup_dirout()
216 chip->lines[offset].dir = GPIO_LINE_DIRECTION_OUT; in gpio_mockup_dirout()
217 __gpio_mockup_set(chip, offset, value); in gpio_mockup_dirout()
218 mutex_unlock(&chip->lock); in gpio_mockup_dirout()
223 static int gpio_mockup_dirin(struct gpio_chip *gc, unsigned int offset) in gpio_mockup_dirin() argument
227 mutex_lock(&chip->lock); in gpio_mockup_dirin()
228 chip->lines[offset].dir = GPIO_LINE_DIRECTION_IN; in gpio_mockup_dirin()
229 mutex_unlock(&chip->lock); in gpio_mockup_dirin()
234 static int gpio_mockup_get_direction(struct gpio_chip *gc, unsigned int offset) in gpio_mockup_get_direction() argument
239 mutex_lock(&chip->lock); in gpio_mockup_get_direction()
240 direction = chip->lines[offset].dir; in gpio_mockup_get_direction()
241 mutex_unlock(&chip->lock); in gpio_mockup_get_direction()
246 static int gpio_mockup_to_irq(struct gpio_chip *gc, unsigned int offset) in gpio_mockup_to_irq() argument
250 return irq_create_mapping(chip->irq_sim_domain, offset); in gpio_mockup_to_irq()
253 static void gpio_mockup_free(struct gpio_chip *gc, unsigned int offset) in gpio_mockup_free() argument
257 __gpio_mockup_set(chip, offset, chip->lines[offset].pull); in gpio_mockup_free()
274 sfile = file->private_data; in gpio_mockup_debugfs_read()
275 priv = sfile->private; in gpio_mockup_debugfs_read()
276 chip = priv->chip; in gpio_mockup_debugfs_read()
277 gc = &chip->gc; in gpio_mockup_debugfs_read()
279 val = gpio_mockup_get(gc, priv->offset); in gpio_mockup_debugfs_read()
294 return -EINVAL; in gpio_mockup_debugfs_write()
300 return -EINVAL; in gpio_mockup_debugfs_write()
302 sfile = file->private_data; in gpio_mockup_debugfs_write()
303 priv = sfile->private; in gpio_mockup_debugfs_write()
304 rv = gpio_mockup_apply_pull(priv->chip, priv->offset, val); in gpio_mockup_debugfs_write()
313 return single_open(file, NULL, inode->i_private); in gpio_mockup_debugfs_open()
318 * name under /sys/kernel/debug/gpio-mockup/. Each line is represented by
319 * a file using the line's offset as the name under the chip's directory.
326 * - when a line pulled down is requested in output mode and driven high, its
328 * - when the line is requested in output mode and driven high, writing 0 to
331 * - line requested in input mode always reports the same value as its pull
333 * - when the line is requested in input mode and monitored for events, writing
355 gc = &chip->gc; in gpio_mockup_debugfs_setup()
356 devname = dev_name(&gc->gpiodev->dev); in gpio_mockup_debugfs_setup()
358 chip->dbg_dir = debugfs_create_dir(devname, gpio_mockup_dbg_dir); in gpio_mockup_debugfs_setup()
360 for (i = 0; i < gc->ngpio; i++) { in gpio_mockup_debugfs_setup()
369 priv->chip = chip; in gpio_mockup_debugfs_setup()
370 priv->offset = i; in gpio_mockup_debugfs_setup()
371 priv->desc = &gc->gpiodev->descs[i]; in gpio_mockup_debugfs_setup()
373 debugfs_create_file(name, 0200, chip->dbg_dir, priv, in gpio_mockup_debugfs_setup()
381 struct gpio_chip *gc = &chip->gc; in gpio_mockup_dispose_mappings()
384 for (i = 0; i < gc->ngpio; i++) { in gpio_mockup_dispose_mappings()
385 irq = irq_find_mapping(chip->irq_sim_domain, i); in gpio_mockup_dispose_mappings()
400 dev = &pdev->dev; in gpio_mockup_probe()
402 rv = device_property_read_u32(dev, "gpio-base", &base); in gpio_mockup_probe()
404 base = -1; in gpio_mockup_probe()
406 rv = device_property_read_u16(dev, "nr-gpios", &ngpio); in gpio_mockup_probe()
410 rv = device_property_read_string(dev, "chip-label", &name); in gpio_mockup_probe()
416 return -ENOMEM; in gpio_mockup_probe()
418 mutex_init(&chip->lock); in gpio_mockup_probe()
420 gc = &chip->gc; in gpio_mockup_probe()
421 gc->base = base; in gpio_mockup_probe()
422 gc->ngpio = ngpio; in gpio_mockup_probe()
423 gc->label = name; in gpio_mockup_probe()
424 gc->owner = THIS_MODULE; in gpio_mockup_probe()
425 gc->parent = dev; in gpio_mockup_probe()
426 gc->get = gpio_mockup_get; in gpio_mockup_probe()
427 gc->set = gpio_mockup_set; in gpio_mockup_probe()
428 gc->get_multiple = gpio_mockup_get_multiple; in gpio_mockup_probe()
429 gc->set_multiple = gpio_mockup_set_multiple; in gpio_mockup_probe()
430 gc->direction_output = gpio_mockup_dirout; in gpio_mockup_probe()
431 gc->direction_input = gpio_mockup_dirin; in gpio_mockup_probe()
432 gc->get_direction = gpio_mockup_get_direction; in gpio_mockup_probe()
433 gc->set_config = gpio_mockup_set_config; in gpio_mockup_probe()
434 gc->to_irq = gpio_mockup_to_irq; in gpio_mockup_probe()
435 gc->free = gpio_mockup_free; in gpio_mockup_probe()
437 chip->lines = devm_kcalloc(dev, gc->ngpio, in gpio_mockup_probe()
438 sizeof(*chip->lines), GFP_KERNEL); in gpio_mockup_probe()
439 if (!chip->lines) in gpio_mockup_probe()
440 return -ENOMEM; in gpio_mockup_probe()
442 for (i = 0; i < gc->ngpio; i++) in gpio_mockup_probe()
443 chip->lines[i].dir = GPIO_LINE_DIRECTION_IN; in gpio_mockup_probe()
445 chip->irq_sim_domain = devm_irq_domain_create_sim(dev, NULL, in gpio_mockup_probe()
446 gc->ngpio); in gpio_mockup_probe()
447 if (IS_ERR(chip->irq_sim_domain)) in gpio_mockup_probe()
448 return PTR_ERR(chip->irq_sim_domain); in gpio_mockup_probe()
454 rv = devm_gpiochip_add_data(dev, &chip->gc, chip); in gpio_mockup_probe()
465 .name = "gpio-mockup",
496 names[i] = kasprintf(GFP_KERNEL, "%s-%u", label, i); in gpio_mockup_make_line_names()
519 snprintf(chip_label, sizeof(chip_label), "gpio-mockup-%c", idx + 'A'); in gpio_mockup_register_chip()
520 properties[prop++] = PROPERTY_ENTRY_STRING("chip-label", chip_label); in gpio_mockup_register_chip()
524 properties[prop++] = PROPERTY_ENTRY_U32("gpio-base", base); in gpio_mockup_register_chip()
527 : gpio_mockup_range_ngpio(idx) - base; in gpio_mockup_register_chip()
528 properties[prop++] = PROPERTY_ENTRY_U16("nr-gpios", ngpio); in gpio_mockup_register_chip()
533 return -ENOMEM; in gpio_mockup_register_chip()
536 "gpio-line-names", line_names, ngpio); in gpio_mockup_register_chip()
539 pdevinfo.name = "gpio-mockup"; in gpio_mockup_register_chip()
562 return -EINVAL; in gpio_mockup_init()
568 * The second value in the <base GPIO - number of GPIOS> pair must in gpio_mockup_init()
573 return -EINVAL; in gpio_mockup_init()
576 gpio_mockup_dbg_dir = debugfs_create_dir("gpio-mockup", NULL); in gpio_mockup_init()