Lines Matching +full:off +full:- +full:chip
1 // SPDX-License-Identifier: GPL-2.0-only
28 * - Push Pull Output
29 * - Input
30 * - Open Drain I/O
39 * - Group A : by I2C address 0b'110xxxx
40 * - Group B : by I2C address 0b'101xxxx
54 * NOTE: MAX7328/MAX7329 are drop-in replacements for PCF8574/a, so
59 #define PORT_OUTPUT 0x1 /* 'O' Push-Pull, Output Only */
61 #define PORT_OPENDRAIN 0x3 /* 'P' Open-Drain, I/O */
158 static int max732x_writeb(struct max732x_chip *chip, int group_a, uint8_t val) in max732x_writeb() argument
163 client = group_a ? chip->client_group_a : chip->client_group_b; in max732x_writeb()
166 dev_err(&client->dev, "failed writing\n"); in max732x_writeb()
173 static int max732x_readb(struct max732x_chip *chip, int group_a, uint8_t *val) in max732x_readb() argument
178 client = group_a ? chip->client_group_a : chip->client_group_b; in max732x_readb()
181 dev_err(&client->dev, "failed reading\n"); in max732x_readb()
189 static inline int is_group_a(struct max732x_chip *chip, unsigned off) in is_group_a() argument
191 return (1u << off) & chip->mask_group_a; in is_group_a()
194 static int max732x_gpio_get_value(struct gpio_chip *gc, unsigned off) in max732x_gpio_get_value() argument
196 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_get_value() local
200 ret = max732x_readb(chip, is_group_a(chip, off), ®_val); in max732x_gpio_get_value()
204 return !!(reg_val & (1u << (off & 0x7))); in max732x_gpio_get_value()
207 static void max732x_gpio_set_mask(struct gpio_chip *gc, unsigned off, int mask, in max732x_gpio_set_mask() argument
210 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_set_mask() local
214 mutex_lock(&chip->lock); in max732x_gpio_set_mask()
216 reg_out = (off > 7) ? chip->reg_out[1] : chip->reg_out[0]; in max732x_gpio_set_mask()
219 ret = max732x_writeb(chip, is_group_a(chip, off), reg_out); in max732x_gpio_set_mask()
224 if (off > 7) in max732x_gpio_set_mask()
225 chip->reg_out[1] = reg_out; in max732x_gpio_set_mask()
227 chip->reg_out[0] = reg_out; in max732x_gpio_set_mask()
229 mutex_unlock(&chip->lock); in max732x_gpio_set_mask()
232 static void max732x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) in max732x_gpio_set_value() argument
234 unsigned base = off & ~0x7; in max732x_gpio_set_value()
235 uint8_t mask = 1u << (off & 0x7); in max732x_gpio_set_value()
237 max732x_gpio_set_mask(gc, base, mask, val << (off & 0x7)); in max732x_gpio_set_value()
252 static int max732x_gpio_direction_input(struct gpio_chip *gc, unsigned off) in max732x_gpio_direction_input() argument
254 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_direction_input() local
255 unsigned int mask = 1u << off; in max732x_gpio_direction_input()
257 if ((mask & chip->dir_input) == 0) { in max732x_gpio_direction_input()
258 dev_dbg(&chip->client->dev, "%s port %d is output only\n", in max732x_gpio_direction_input()
259 chip->client->name, off); in max732x_gpio_direction_input()
260 return -EACCES; in max732x_gpio_direction_input()
264 * Open-drain pins must be set to high impedance (which is in max732x_gpio_direction_input()
265 * equivalent to output-high) to be turned into an input. in max732x_gpio_direction_input()
267 if ((mask & chip->dir_output)) in max732x_gpio_direction_input()
268 max732x_gpio_set_value(gc, off, 1); in max732x_gpio_direction_input()
274 unsigned off, int val) in max732x_gpio_direction_output() argument
276 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_direction_output() local
277 unsigned int mask = 1u << off; in max732x_gpio_direction_output()
279 if ((mask & chip->dir_output) == 0) { in max732x_gpio_direction_output()
280 dev_dbg(&chip->client->dev, "%s port %d is input only\n", in max732x_gpio_direction_output()
281 chip->client->name, off); in max732x_gpio_direction_output()
282 return -EACCES; in max732x_gpio_direction_output()
285 max732x_gpio_set_value(gc, off, val); in max732x_gpio_direction_output()
290 static int max732x_writew(struct max732x_chip *chip, uint16_t val) in max732x_writew() argument
296 ret = i2c_master_send(chip->client_group_a, (char *)&val, 2); in max732x_writew()
298 dev_err(&chip->client_group_a->dev, "failed writing\n"); in max732x_writew()
305 static int max732x_readw(struct max732x_chip *chip, uint16_t *val) in max732x_readw() argument
309 ret = i2c_master_recv(chip->client_group_a, (char *)val, 2); in max732x_readw()
311 dev_err(&chip->client_group_a->dev, "failed reading\n"); in max732x_readw()
319 static void max732x_irq_update_mask(struct max732x_chip *chip) in max732x_irq_update_mask() argument
323 if (chip->irq_mask == chip->irq_mask_cur) in max732x_irq_update_mask()
326 chip->irq_mask = chip->irq_mask_cur; in max732x_irq_update_mask()
328 if (chip->irq_features == INT_NO_MASK) in max732x_irq_update_mask()
331 mutex_lock(&chip->lock); in max732x_irq_update_mask()
333 switch (chip->irq_features) { in max732x_irq_update_mask()
335 msg = (chip->irq_mask << 8) | chip->reg_out[0]; in max732x_irq_update_mask()
336 max732x_writew(chip, msg); in max732x_irq_update_mask()
340 msg = chip->irq_mask | chip->reg_out[0]; in max732x_irq_update_mask()
341 max732x_writeb(chip, 1, (uint8_t)msg); in max732x_irq_update_mask()
345 mutex_unlock(&chip->lock); in max732x_irq_update_mask()
351 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_mask() local
353 chip->irq_mask_cur &= ~(1 << d->hwirq); in max732x_irq_mask()
359 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_unmask() local
361 chip->irq_mask_cur |= 1 << d->hwirq; in max732x_irq_unmask()
367 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_bus_lock() local
369 mutex_lock(&chip->irq_lock); in max732x_irq_bus_lock()
370 chip->irq_mask_cur = chip->irq_mask; in max732x_irq_bus_lock()
376 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_bus_sync_unlock() local
380 max732x_irq_update_mask(chip); in max732x_irq_bus_sync_unlock()
382 new_irqs = chip->irq_trig_fall | chip->irq_trig_raise; in max732x_irq_bus_sync_unlock()
385 max732x_gpio_direction_input(&chip->gpio_chip, level); in max732x_irq_bus_sync_unlock()
389 mutex_unlock(&chip->irq_lock); in max732x_irq_bus_sync_unlock()
395 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_set_type() local
396 uint16_t off = d->hwirq; in max732x_irq_set_type() local
397 uint16_t mask = 1 << off; in max732x_irq_set_type()
399 if (!(mask & chip->dir_input)) { in max732x_irq_set_type()
400 dev_dbg(&chip->client->dev, "%s port %d is output only\n", in max732x_irq_set_type()
401 chip->client->name, off); in max732x_irq_set_type()
402 return -EACCES; in max732x_irq_set_type()
406 dev_err(&chip->client->dev, "irq %d: unsupported type %d\n", in max732x_irq_set_type()
407 d->irq, type); in max732x_irq_set_type()
408 return -EINVAL; in max732x_irq_set_type()
412 chip->irq_trig_fall |= mask; in max732x_irq_set_type()
414 chip->irq_trig_fall &= ~mask; in max732x_irq_set_type()
417 chip->irq_trig_raise |= mask; in max732x_irq_set_type()
419 chip->irq_trig_raise &= ~mask; in max732x_irq_set_type()
426 struct max732x_chip *chip = irq_data_get_irq_chip_data(data); in max732x_irq_set_wake() local
428 irq_set_irq_wake(chip->client->irq, on); in max732x_irq_set_wake()
442 static uint8_t max732x_irq_pending(struct max732x_chip *chip) in max732x_irq_pending() argument
451 ret = max732x_readw(chip, &status); in max732x_irq_pending()
456 trigger &= chip->irq_mask; in max732x_irq_pending()
462 cur_stat &= chip->irq_mask; in max732x_irq_pending()
466 pending = (old_stat & chip->irq_trig_fall) | in max732x_irq_pending()
467 (cur_stat & chip->irq_trig_raise); in max732x_irq_pending()
475 struct max732x_chip *chip = devid; in max732x_irq_handler() local
479 pending = max732x_irq_pending(chip); in max732x_irq_handler()
486 handle_nested_irq(irq_find_mapping(chip->gpio_chip.irq.domain, in max732x_irq_handler()
495 static int max732x_irq_setup(struct max732x_chip *chip, in max732x_irq_setup() argument
498 struct i2c_client *client = chip->client; in max732x_irq_setup()
499 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_irq_setup()
500 int has_irq = max732x_features[id->driver_data] >> 32; in max732x_irq_setup()
504 if (((pdata && pdata->irq_base) || client->irq) in max732x_irq_setup()
509 irq_base = pdata->irq_base; in max732x_irq_setup()
510 chip->irq_features = has_irq; in max732x_irq_setup()
511 mutex_init(&chip->irq_lock); in max732x_irq_setup()
513 ret = devm_request_threaded_irq(&client->dev, client->irq, in max732x_irq_setup()
516 dev_name(&client->dev), chip); in max732x_irq_setup()
518 dev_err(&client->dev, "failed to request irq %d\n", in max732x_irq_setup()
519 client->irq); in max732x_irq_setup()
523 girq = &chip->gpio_chip.irq; in max732x_irq_setup()
524 girq->chip = &max732x_irq_chip; in max732x_irq_setup()
526 girq->parent_handler = NULL; in max732x_irq_setup()
527 girq->num_parents = 0; in max732x_irq_setup()
528 girq->parents = NULL; in max732x_irq_setup()
529 girq->default_type = IRQ_TYPE_NONE; in max732x_irq_setup()
530 girq->handler = handle_simple_irq; in max732x_irq_setup()
531 girq->threaded = true; in max732x_irq_setup()
532 girq->first = irq_base; /* FIXME: get rid of this */ in max732x_irq_setup()
539 static int max732x_irq_setup(struct max732x_chip *chip, in max732x_irq_setup() argument
542 struct i2c_client *client = chip->client; in max732x_irq_setup()
543 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_irq_setup()
544 int has_irq = max732x_features[id->driver_data] >> 32; in max732x_irq_setup()
546 if (((pdata && pdata->irq_base) || client->irq) && has_irq != INT_NONE) in max732x_irq_setup()
547 dev_warn(&client->dev, "interrupt support not compiled in\n"); in max732x_irq_setup()
553 static int max732x_setup_gpio(struct max732x_chip *chip, in max732x_setup_gpio() argument
557 struct gpio_chip *gc = &chip->gpio_chip; in max732x_setup_gpio()
558 uint32_t id_data = (uint32_t)max732x_features[id->driver_data]; in max732x_setup_gpio()
566 chip->dir_output |= mask; in max732x_setup_gpio()
569 chip->dir_input |= mask; in max732x_setup_gpio()
572 chip->dir_output |= mask; in max732x_setup_gpio()
573 chip->dir_input |= mask; in max732x_setup_gpio()
580 chip->mask_group_a |= mask; in max732x_setup_gpio()
584 if (chip->dir_input) in max732x_setup_gpio()
585 gc->direction_input = max732x_gpio_direction_input; in max732x_setup_gpio()
586 if (chip->dir_output) { in max732x_setup_gpio()
587 gc->direction_output = max732x_gpio_direction_output; in max732x_setup_gpio()
588 gc->set = max732x_gpio_set_value; in max732x_setup_gpio()
589 gc->set_multiple = max732x_gpio_set_multiple; in max732x_setup_gpio()
591 gc->get = max732x_gpio_get_value; in max732x_setup_gpio()
592 gc->can_sleep = true; in max732x_setup_gpio()
594 gc->base = gpio_start; in max732x_setup_gpio()
595 gc->ngpio = port; in max732x_setup_gpio()
596 gc->label = chip->client->name; in max732x_setup_gpio()
597 gc->parent = &chip->client->dev; in max732x_setup_gpio()
598 gc->owner = THIS_MODULE; in max732x_setup_gpio()
611 pdata->gpio_base = -1; in of_gpio_max732x()
621 struct max732x_chip *chip; in max732x_probe() local
626 pdata = dev_get_platdata(&client->dev); in max732x_probe()
627 node = client->dev.of_node; in max732x_probe()
630 pdata = of_gpio_max732x(&client->dev); in max732x_probe()
633 dev_dbg(&client->dev, "no platform data\n"); in max732x_probe()
634 return -EINVAL; in max732x_probe()
637 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); in max732x_probe()
638 if (chip == NULL) in max732x_probe()
639 return -ENOMEM; in max732x_probe()
640 chip->client = client; in max732x_probe()
642 nr_port = max732x_setup_gpio(chip, id, pdata->gpio_base); in max732x_probe()
643 chip->gpio_chip.parent = &client->dev; in max732x_probe()
645 addr_a = (client->addr & 0x0f) | 0x60; in max732x_probe()
646 addr_b = (client->addr & 0x0f) | 0x50; in max732x_probe()
648 switch (client->addr & 0x70) { in max732x_probe()
650 chip->client_group_a = client; in max732x_probe()
652 c = devm_i2c_new_dummy_device(&client->dev, in max732x_probe()
653 client->adapter, addr_b); in max732x_probe()
655 dev_err(&client->dev, in max732x_probe()
659 chip->client_group_b = chip->client_dummy = c; in max732x_probe()
663 chip->client_group_b = client; in max732x_probe()
665 c = devm_i2c_new_dummy_device(&client->dev, in max732x_probe()
666 client->adapter, addr_a); in max732x_probe()
668 dev_err(&client->dev, in max732x_probe()
672 chip->client_group_a = chip->client_dummy = c; in max732x_probe()
676 dev_err(&client->dev, "invalid I2C address specified %02x\n", in max732x_probe()
677 client->addr); in max732x_probe()
678 return -EINVAL; in max732x_probe()
681 if (nr_port > 8 && !chip->client_dummy) { in max732x_probe()
682 dev_err(&client->dev, in max732x_probe()
684 return -ENODEV; in max732x_probe()
687 mutex_init(&chip->lock); in max732x_probe()
689 ret = max732x_readb(chip, is_group_a(chip, 0), &chip->reg_out[0]); in max732x_probe()
693 ret = max732x_readb(chip, is_group_a(chip, 8), &chip->reg_out[1]); in max732x_probe()
698 ret = max732x_irq_setup(chip, id); in max732x_probe()
702 ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip); in max732x_probe()
706 if (pdata->setup) { in max732x_probe()
707 ret = pdata->setup(client, chip->gpio_chip.base, in max732x_probe()
708 chip->gpio_chip.ngpio, pdata->context); in max732x_probe()
710 dev_warn(&client->dev, "setup failed, %d\n", ret); in max732x_probe()
713 i2c_set_clientdata(client, chip); in max732x_probe()
719 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_remove()
720 struct max732x_chip *chip = i2c_get_clientdata(client); in max732x_remove() local
722 if (pdata && pdata->teardown) { in max732x_remove()
725 ret = pdata->teardown(client, chip->gpio_chip.base, in max732x_remove()
726 chip->gpio_chip.ngpio, pdata->context); in max732x_remove()
728 dev_err(&client->dev, "%s failed, %d\n", in max732x_remove()