Lines Matching +full:off +full:- +full:chip
31 * - Push Pull Output
32 * - Input
33 * - Open Drain I/O
42 * - Group A : by I2C address 0b'110xxxx
43 * - Group B : by I2C address 0b'101xxxx
57 * NOTE: MAX7328/MAX7329 are drop-in replacements for PCF8574/a, so
62 #define PORT_OUTPUT 0x1 /* 'O' Push-Pull, Output Only */
64 #define PORT_OPENDRAIN 0x3 /* 'P' Open-Drain, I/O */
161 static int max732x_writeb(struct max732x_chip *chip, int group_a, uint8_t val) in max732x_writeb() argument
166 client = group_a ? chip->client_group_a : chip->client_group_b; in max732x_writeb()
169 dev_err(&client->dev, "failed writing\n"); in max732x_writeb()
176 static int max732x_readb(struct max732x_chip *chip, int group_a, uint8_t *val) in max732x_readb() argument
181 client = group_a ? chip->client_group_a : chip->client_group_b; in max732x_readb()
184 dev_err(&client->dev, "failed reading\n"); in max732x_readb()
192 static inline int is_group_a(struct max732x_chip *chip, unsigned off) in is_group_a() argument
194 return (1u << off) & chip->mask_group_a; in is_group_a()
197 static int max732x_gpio_get_value(struct gpio_chip *gc, unsigned off) in max732x_gpio_get_value() argument
199 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_get_value() local
203 ret = max732x_readb(chip, is_group_a(chip, off), ®_val); in max732x_gpio_get_value()
207 return !!(reg_val & (1u << (off & 0x7))); in max732x_gpio_get_value()
210 static void max732x_gpio_set_mask(struct gpio_chip *gc, unsigned off, int mask, in max732x_gpio_set_mask() argument
213 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_set_mask() local
217 mutex_lock(&chip->lock); in max732x_gpio_set_mask()
219 reg_out = (off > 7) ? chip->reg_out[1] : chip->reg_out[0]; in max732x_gpio_set_mask()
222 ret = max732x_writeb(chip, is_group_a(chip, off), reg_out); in max732x_gpio_set_mask()
227 if (off > 7) in max732x_gpio_set_mask()
228 chip->reg_out[1] = reg_out; in max732x_gpio_set_mask()
230 chip->reg_out[0] = reg_out; in max732x_gpio_set_mask()
232 mutex_unlock(&chip->lock); in max732x_gpio_set_mask()
235 static void max732x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) in max732x_gpio_set_value() argument
237 unsigned base = off & ~0x7; in max732x_gpio_set_value()
238 uint8_t mask = 1u << (off & 0x7); in max732x_gpio_set_value()
240 max732x_gpio_set_mask(gc, base, mask, val << (off & 0x7)); in max732x_gpio_set_value()
255 static int max732x_gpio_direction_input(struct gpio_chip *gc, unsigned off) in max732x_gpio_direction_input() argument
257 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_direction_input() local
258 unsigned int mask = 1u << off; in max732x_gpio_direction_input()
260 if ((mask & chip->dir_input) == 0) { in max732x_gpio_direction_input()
261 dev_dbg(&chip->client->dev, "%s port %d is output only\n", in max732x_gpio_direction_input()
262 chip->client->name, off); in max732x_gpio_direction_input()
263 return -EACCES; in max732x_gpio_direction_input()
267 * Open-drain pins must be set to high impedance (which is in max732x_gpio_direction_input()
268 * equivalent to output-high) to be turned into an input. in max732x_gpio_direction_input()
270 if ((mask & chip->dir_output)) in max732x_gpio_direction_input()
271 max732x_gpio_set_value(gc, off, 1); in max732x_gpio_direction_input()
277 unsigned off, int val) in max732x_gpio_direction_output() argument
279 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_gpio_direction_output() local
280 unsigned int mask = 1u << off; in max732x_gpio_direction_output()
282 if ((mask & chip->dir_output) == 0) { in max732x_gpio_direction_output()
283 dev_dbg(&chip->client->dev, "%s port %d is input only\n", in max732x_gpio_direction_output()
284 chip->client->name, off); in max732x_gpio_direction_output()
285 return -EACCES; in max732x_gpio_direction_output()
288 max732x_gpio_set_value(gc, off, val); in max732x_gpio_direction_output()
293 static int max732x_writew(struct max732x_chip *chip, uint16_t val) in max732x_writew() argument
299 ret = i2c_master_send(chip->client_group_a, (char *)&val, 2); in max732x_writew()
301 dev_err(&chip->client_group_a->dev, "failed writing\n"); in max732x_writew()
308 static int max732x_readw(struct max732x_chip *chip, uint16_t *val) in max732x_readw() argument
312 ret = i2c_master_recv(chip->client_group_a, (char *)val, 2); in max732x_readw()
314 dev_err(&chip->client_group_a->dev, "failed reading\n"); in max732x_readw()
322 static void max732x_irq_update_mask(struct max732x_chip *chip) in max732x_irq_update_mask() argument
326 if (chip->irq_mask == chip->irq_mask_cur) in max732x_irq_update_mask()
329 chip->irq_mask = chip->irq_mask_cur; in max732x_irq_update_mask()
331 if (chip->irq_features == INT_NO_MASK) in max732x_irq_update_mask()
334 mutex_lock(&chip->lock); in max732x_irq_update_mask()
336 switch (chip->irq_features) { in max732x_irq_update_mask()
338 msg = (chip->irq_mask << 8) | chip->reg_out[0]; in max732x_irq_update_mask()
339 max732x_writew(chip, msg); in max732x_irq_update_mask()
343 msg = chip->irq_mask | chip->reg_out[0]; in max732x_irq_update_mask()
344 max732x_writeb(chip, 1, (uint8_t)msg); in max732x_irq_update_mask()
348 mutex_unlock(&chip->lock); in max732x_irq_update_mask()
354 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_mask() local
356 chip->irq_mask_cur &= ~(1 << d->hwirq); in max732x_irq_mask()
362 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_unmask() local
364 chip->irq_mask_cur |= 1 << d->hwirq; in max732x_irq_unmask()
370 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_bus_lock() local
372 mutex_lock(&chip->irq_lock); in max732x_irq_bus_lock()
373 chip->irq_mask_cur = chip->irq_mask; in max732x_irq_bus_lock()
379 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_bus_sync_unlock() local
383 max732x_irq_update_mask(chip); in max732x_irq_bus_sync_unlock()
385 new_irqs = chip->irq_trig_fall | chip->irq_trig_raise; in max732x_irq_bus_sync_unlock()
388 max732x_gpio_direction_input(&chip->gpio_chip, level); in max732x_irq_bus_sync_unlock()
392 mutex_unlock(&chip->irq_lock); in max732x_irq_bus_sync_unlock()
398 struct max732x_chip *chip = gpiochip_get_data(gc); in max732x_irq_set_type() local
399 uint16_t off = d->hwirq; in max732x_irq_set_type() local
400 uint16_t mask = 1 << off; in max732x_irq_set_type()
402 if (!(mask & chip->dir_input)) { in max732x_irq_set_type()
403 dev_dbg(&chip->client->dev, "%s port %d is output only\n", in max732x_irq_set_type()
404 chip->client->name, off); in max732x_irq_set_type()
405 return -EACCES; in max732x_irq_set_type()
409 dev_err(&chip->client->dev, "irq %d: unsupported type %d\n", in max732x_irq_set_type()
410 d->irq, type); in max732x_irq_set_type()
411 return -EINVAL; in max732x_irq_set_type()
415 chip->irq_trig_fall |= mask; in max732x_irq_set_type()
417 chip->irq_trig_fall &= ~mask; in max732x_irq_set_type()
420 chip->irq_trig_raise |= mask; in max732x_irq_set_type()
422 chip->irq_trig_raise &= ~mask; in max732x_irq_set_type()
429 struct max732x_chip *chip = irq_data_get_irq_chip_data(data); in max732x_irq_set_wake() local
431 irq_set_irq_wake(chip->client->irq, on); in max732x_irq_set_wake()
445 static uint8_t max732x_irq_pending(struct max732x_chip *chip) in max732x_irq_pending() argument
454 ret = max732x_readw(chip, &status); in max732x_irq_pending()
459 trigger &= chip->irq_mask; in max732x_irq_pending()
465 cur_stat &= chip->irq_mask; in max732x_irq_pending()
469 pending = (old_stat & chip->irq_trig_fall) | in max732x_irq_pending()
470 (cur_stat & chip->irq_trig_raise); in max732x_irq_pending()
478 struct max732x_chip *chip = devid; in max732x_irq_handler() local
482 pending = max732x_irq_pending(chip); in max732x_irq_handler()
489 handle_nested_irq(irq_find_mapping(chip->gpio_chip.irq.domain, in max732x_irq_handler()
498 static int max732x_irq_setup(struct max732x_chip *chip, in max732x_irq_setup() argument
501 struct i2c_client *client = chip->client; in max732x_irq_setup()
502 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_irq_setup()
503 int has_irq = max732x_features[id->driver_data] >> 32; in max732x_irq_setup()
507 if (((pdata && pdata->irq_base) || client->irq) in max732x_irq_setup()
510 irq_base = pdata->irq_base; in max732x_irq_setup()
511 chip->irq_features = has_irq; in max732x_irq_setup()
512 mutex_init(&chip->irq_lock); in max732x_irq_setup()
514 ret = devm_request_threaded_irq(&client->dev, client->irq, in max732x_irq_setup()
517 dev_name(&client->dev), chip); in max732x_irq_setup()
519 dev_err(&client->dev, "failed to request irq %d\n", in max732x_irq_setup()
520 client->irq); in max732x_irq_setup()
523 ret = gpiochip_irqchip_add_nested(&chip->gpio_chip, in max732x_irq_setup()
529 dev_err(&client->dev, in max732x_irq_setup()
533 gpiochip_set_nested_irqchip(&chip->gpio_chip, in max732x_irq_setup()
535 client->irq); in max732x_irq_setup()
542 static int max732x_irq_setup(struct max732x_chip *chip, in max732x_irq_setup() argument
545 struct i2c_client *client = chip->client; in max732x_irq_setup()
546 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_irq_setup()
547 int has_irq = max732x_features[id->driver_data] >> 32; in max732x_irq_setup()
549 if (((pdata && pdata->irq_base) || client->irq) && has_irq != INT_NONE) in max732x_irq_setup()
550 dev_warn(&client->dev, "interrupt support not compiled in\n"); in max732x_irq_setup()
556 static int max732x_setup_gpio(struct max732x_chip *chip, in max732x_setup_gpio() argument
560 struct gpio_chip *gc = &chip->gpio_chip; in max732x_setup_gpio()
561 uint32_t id_data = (uint32_t)max732x_features[id->driver_data]; in max732x_setup_gpio()
569 chip->dir_output |= mask; in max732x_setup_gpio()
572 chip->dir_input |= mask; in max732x_setup_gpio()
575 chip->dir_output |= mask; in max732x_setup_gpio()
576 chip->dir_input |= mask; in max732x_setup_gpio()
583 chip->mask_group_a |= mask; in max732x_setup_gpio()
587 if (chip->dir_input) in max732x_setup_gpio()
588 gc->direction_input = max732x_gpio_direction_input; in max732x_setup_gpio()
589 if (chip->dir_output) { in max732x_setup_gpio()
590 gc->direction_output = max732x_gpio_direction_output; in max732x_setup_gpio()
591 gc->set = max732x_gpio_set_value; in max732x_setup_gpio()
592 gc->set_multiple = max732x_gpio_set_multiple; in max732x_setup_gpio()
594 gc->get = max732x_gpio_get_value; in max732x_setup_gpio()
595 gc->can_sleep = true; in max732x_setup_gpio()
597 gc->base = gpio_start; in max732x_setup_gpio()
598 gc->ngpio = port; in max732x_setup_gpio()
599 gc->label = chip->client->name; in max732x_setup_gpio()
600 gc->parent = &chip->client->dev; in max732x_setup_gpio()
601 gc->owner = THIS_MODULE; in max732x_setup_gpio()
614 pdata->gpio_base = -1; in of_gpio_max732x()
624 struct max732x_chip *chip; in max732x_probe() local
629 pdata = dev_get_platdata(&client->dev); in max732x_probe()
630 node = client->dev.of_node; in max732x_probe()
633 pdata = of_gpio_max732x(&client->dev); in max732x_probe()
636 dev_dbg(&client->dev, "no platform data\n"); in max732x_probe()
637 return -EINVAL; in max732x_probe()
640 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); in max732x_probe()
641 if (chip == NULL) in max732x_probe()
642 return -ENOMEM; in max732x_probe()
643 chip->client = client; in max732x_probe()
645 nr_port = max732x_setup_gpio(chip, id, pdata->gpio_base); in max732x_probe()
646 chip->gpio_chip.parent = &client->dev; in max732x_probe()
648 addr_a = (client->addr & 0x0f) | 0x60; in max732x_probe()
649 addr_b = (client->addr & 0x0f) | 0x50; in max732x_probe()
651 switch (client->addr & 0x70) { in max732x_probe()
653 chip->client_group_a = client; in max732x_probe()
655 c = i2c_new_dummy(client->adapter, addr_b); in max732x_probe()
657 dev_err(&client->dev, in max732x_probe()
659 ret = -ENODEV; in max732x_probe()
662 chip->client_group_b = chip->client_dummy = c; in max732x_probe()
666 chip->client_group_b = client; in max732x_probe()
668 c = i2c_new_dummy(client->adapter, addr_a); in max732x_probe()
670 dev_err(&client->dev, in max732x_probe()
672 ret = -ENODEV; in max732x_probe()
675 chip->client_group_a = chip->client_dummy = c; in max732x_probe()
679 dev_err(&client->dev, "invalid I2C address specified %02x\n", in max732x_probe()
680 client->addr); in max732x_probe()
681 ret = -EINVAL; in max732x_probe()
685 if (nr_port > 8 && !chip->client_dummy) { in max732x_probe()
686 dev_err(&client->dev, in max732x_probe()
688 ret = -ENODEV; in max732x_probe()
692 mutex_init(&chip->lock); in max732x_probe()
694 ret = max732x_readb(chip, is_group_a(chip, 0), &chip->reg_out[0]); in max732x_probe()
698 ret = max732x_readb(chip, is_group_a(chip, 8), &chip->reg_out[1]); in max732x_probe()
703 ret = gpiochip_add_data(&chip->gpio_chip, chip); in max732x_probe()
707 ret = max732x_irq_setup(chip, id); in max732x_probe()
709 gpiochip_remove(&chip->gpio_chip); in max732x_probe()
713 if (pdata && pdata->setup) { in max732x_probe()
714 ret = pdata->setup(client, chip->gpio_chip.base, in max732x_probe()
715 chip->gpio_chip.ngpio, pdata->context); in max732x_probe()
717 dev_warn(&client->dev, "setup failed, %d\n", ret); in max732x_probe()
720 i2c_set_clientdata(client, chip); in max732x_probe()
724 i2c_unregister_device(chip->client_dummy); in max732x_probe()
730 struct max732x_platform_data *pdata = dev_get_platdata(&client->dev); in max732x_remove()
731 struct max732x_chip *chip = i2c_get_clientdata(client); in max732x_remove() local
733 if (pdata && pdata->teardown) { in max732x_remove()
736 ret = pdata->teardown(client, chip->gpio_chip.base, in max732x_remove()
737 chip->gpio_chip.ngpio, pdata->context); in max732x_remove()
739 dev_err(&client->dev, "%s failed, %d\n", in max732x_remove()
745 gpiochip_remove(&chip->gpio_chip); in max732x_remove()
748 i2c_unregister_device(chip->client_dummy); in max732x_remove()