Lines Matching +full:pwm +full:- +full:leds
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2007-2008 Extreme Engineering Solutions, Inc.
5 * Author: Nate Case <ncase@xes-inc.com>
11 * Device Description 7-bit slave address
12 * ------ ----------- -------------------
13 * PCA9550 2-bit driver 0x60 .. 0x61
14 * PCA9551 8-bit driver 0x60 .. 0x67
15 * PCA9552 16-bit driver 0x60 .. 0x67
16 * PCA9553/01 4-bit driver 0x62
17 * PCA9553/02 4-bit driver 0x63
22 * ---------------- -----------
25 * NUM_INPUT_REGS - 1 Last Input register X
28 * NUM_INPUT_REGS + 1 PWM register 0
30 * NUM_INPUT_REGS + 3 PWM register 1
34 * + NUM_LED_REGS - 1 Last LED selector
46 #include <linux/leds.h>
53 #include <dt-bindings/leds/leds-pca955x.h>
57 #define PCA955X_LS_LED_OFF 0x1 /* Output HI-Z */
77 u8 slv_addr; /* 7-bit slave address mask */
119 { "ibm-pca9552", ibm_pca9552 },
127 struct pca955x_led *leds; member
150 struct pca955x_led *leds; member
168 * the appropriate 2-bit state value set for the given LED number (0-3).
183 * period of the PWM output. period = (PSCx + 1) / coeff
188 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_write_psc()
191 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_psc()
193 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_psc()
199 * Write to PWM register, which determines the duty cycle of the
203 * Duty cycle is (256 - PWMx) / 256
207 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_write_pwm()
210 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_pwm()
212 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_pwm()
223 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_write_ls()
226 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_ls()
228 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_ls()
239 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_read_ls()
242 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_ls()
244 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_ls()
253 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_read_pwm()
256 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_pwm()
258 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_pwm()
267 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_read_psc()
270 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_psc()
272 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_psc()
282 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_get()
283 u8 ls, pwm; in pca955x_led_get() local
286 ret = pca955x_read_ls(pca955x, pca955x_led->led_num / 4, &ls); in pca955x_led_get()
290 switch (pca955x_ledstate(ls, pca955x_led->led_num % 4)) { in pca955x_led_get()
299 ret = pca955x_read_pwm(pca955x, 1, &pwm); in pca955x_led_get()
302 ret = 255 - pwm; in pca955x_led_get()
313 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_set()
314 int reg = pca955x_led->led_num / 4; in pca955x_led_set()
315 int bit = pca955x_led->led_num % 4; in pca955x_led_set()
319 mutex_lock(&pca955x->lock); in pca955x_led_set()
325 if (test_bit(pca955x_led->led_num, &pca955x->active_blink)) { in pca955x_led_set()
327 clear_bit(pca955x_led->led_num, &pca955x->active_blink); in pca955x_led_set()
330 /* No variable brightness for blinking LEDs */ in pca955x_led_set()
344 * side effect of making all LEDs on the chip share the in pca955x_led_set()
349 ret = pca955x_write_pwm(pca955x, 1, 255 - value); in pca955x_led_set()
360 mutex_unlock(&pca955x->lock); in pca955x_led_set()
367 p *= pca955x->chipdef->blink_div; in pca955x_period_to_psc()
369 p -= 1; in pca955x_period_to_psc()
380 p /= pca955x->chipdef->blink_div; in pca955x_psc_to_period()
389 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_blink()
393 mutex_lock(&pca955x->lock); in pca955x_led_blink()
397 ret = -EINVAL; in pca955x_led_blink()
403 ret = -EINVAL; in pca955x_led_blink()
407 p = pca955x->active_blink ? pca955x->blink_period : in pca955x_led_blink()
411 if (!pca955x->active_blink || in pca955x_led_blink()
412 pca955x->active_blink == BIT(pca955x_led->led_num) || in pca955x_led_blink()
413 pca955x->blink_period == p) { in pca955x_led_blink()
416 if (!test_and_set_bit(pca955x_led->led_num, in pca955x_led_blink()
417 &pca955x->active_blink)) { in pca955x_led_blink()
419 int reg = pca955x_led->led_num / 4; in pca955x_led_blink()
420 int bit = pca955x_led->led_num % 4; in pca955x_led_blink()
440 if (pca955x->blink_period != p) { in pca955x_led_blink()
441 pca955x->blink_period = p; in pca955x_led_blink()
452 ret = -EBUSY; in pca955x_led_blink()
456 mutex_unlock(&pca955x->lock); in pca955x_led_blink()
463 * Read the INPUT register, which contains the state of LEDs.
470 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_input()
483 return test_and_set_bit(offset, &pca955x->active_pins) ? -EBUSY : 0; in pca955x_gpio_request_pin()
490 clear_bit(offset, &pca955x->active_pins); in pca955x_gpio_free_pin()
497 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_set_value()
500 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH); in pca955x_set_value()
502 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW); in pca955x_set_value()
514 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_get_value()
518 pca955x_read_input(pca955x->client, led->led_num / 8, ®); in pca955x_gpio_get_value()
520 return !!(reg & (1 << (led->led_num % 8))); in pca955x_gpio_get_value()
527 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_direction_input()
530 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT); in pca955x_gpio_direction_input()
548 count = device_get_child_node_count(&client->dev); in pca955x_get_pdata()
549 if (count > chip->bits) in pca955x_get_pdata()
550 return ERR_PTR(-ENODEV); in pca955x_get_pdata()
552 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); in pca955x_get_pdata()
554 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
556 pdata->leds = devm_kcalloc(&client->dev, in pca955x_get_pdata()
557 chip->bits, sizeof(struct pca955x_led), in pca955x_get_pdata()
559 if (!pdata->leds) in pca955x_get_pdata()
560 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
562 device_for_each_child_node(&client->dev, child) { in pca955x_get_pdata()
567 if ((res != 0) || (reg >= chip->bits)) in pca955x_get_pdata()
570 led = &pdata->leds[reg]; in pca955x_get_pdata()
571 led->type = PCA955X_TYPE_LED; in pca955x_get_pdata()
572 led->fwnode = child; in pca955x_get_pdata()
573 led->default_state = led_init_default_state_get(child); in pca955x_get_pdata()
575 fwnode_property_read_u32(child, "type", &led->type); in pca955x_get_pdata()
578 pdata->num_leds = chip->bits; in pca955x_get_pdata()
610 const void *md = device_get_match_data(&client->dev); in pca955x_probe()
619 chip_type = (enum pca955x_type)id->driver_data; in pca955x_probe()
621 dev_err(&client->dev, "unknown chip\n"); in pca955x_probe()
622 return -ENODEV; in pca955x_probe()
627 adapter = client->adapter; in pca955x_probe()
628 pdata = dev_get_platdata(&client->dev); in pca955x_probe()
636 if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) != in pca955x_probe()
637 chip->slv_addr) { in pca955x_probe()
638 dev_err(&client->dev, "invalid slave address %02x\n", in pca955x_probe()
639 client->addr); in pca955x_probe()
640 return -ENODEV; in pca955x_probe()
643 dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at " in pca955x_probe()
644 "slave address 0x%02x\n", client->name, chip->bits, in pca955x_probe()
645 client->addr); in pca955x_probe()
648 return -EIO; in pca955x_probe()
650 if (pdata->num_leds != chip->bits) { in pca955x_probe()
651 dev_err(&client->dev, in pca955x_probe()
652 "board info claims %d LEDs on a %d-bit chip\n", in pca955x_probe()
653 pdata->num_leds, chip->bits); in pca955x_probe()
654 return -ENODEV; in pca955x_probe()
657 pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL); in pca955x_probe()
659 return -ENOMEM; in pca955x_probe()
661 pca955x->leds = devm_kcalloc(&client->dev, chip->bits, in pca955x_probe()
663 if (!pca955x->leds) in pca955x_probe()
664 return -ENOMEM; in pca955x_probe()
668 mutex_init(&pca955x->lock); in pca955x_probe()
669 pca955x->client = client; in pca955x_probe()
670 pca955x->chipdef = chip; in pca955x_probe()
671 pca955x->blink_period = PCA955X_BLINK_DEFAULT_MS; in pca955x_probe()
676 nls = pca955x_num_led_regs(chip->bits); in pca955x_probe()
677 /* use auto-increment feature to read all the led selectors at once */ in pca955x_probe()
679 0x10 | (pca955x_num_input_regs(chip->bits) + 4), nls, in pca955x_probe()
687 for (i = 0; i < chip->bits; i++) { in pca955x_probe()
688 pca955x_led = &pca955x->leds[i]; in pca955x_probe()
689 pca955x_led->led_num = i; in pca955x_probe()
690 pca955x_led->pca955x = pca955x; in pca955x_probe()
691 pca955x_led->type = pdata->leds[i].type; in pca955x_probe()
693 switch (pca955x_led->type) { in pca955x_probe()
700 led = &pca955x_led->led_cdev; in pca955x_probe()
701 led->brightness_set_blocking = pca955x_led_set; in pca955x_probe()
702 led->brightness_get = pca955x_led_get; in pca955x_probe()
703 led->blink_set = pca955x_led_blink; in pca955x_probe()
705 if (pdata->leds[i].default_state == LEDS_DEFSTATE_OFF) in pca955x_probe()
707 else if (pdata->leds[i].default_state == LEDS_DEFSTATE_ON) in pca955x_probe()
711 set_bit(i, &pca955x->active_blink); in pca955x_probe()
714 init_data.fwnode = pdata->leds[i].fwnode; in pca955x_probe()
717 if (to_of_node(init_data.fwnode)->name[0] == in pca955x_probe()
734 err = devm_led_classdev_register_ext(&client->dev, led, in pca955x_probe()
739 set_bit(i, &pca955x->active_pins); in pca955x_probe()
754 psc0 = pca955x_period_to_psc(pca955x, pca955x->blink_period); in pca955x_probe()
761 pca955x->blink_period = pca955x_psc_to_period(pca955x, psc0); in pca955x_probe()
769 pca955x->gpio.label = "gpio-pca955x"; in pca955x_probe()
770 pca955x->gpio.direction_input = pca955x_gpio_direction_input; in pca955x_probe()
771 pca955x->gpio.direction_output = pca955x_gpio_direction_output; in pca955x_probe()
772 pca955x->gpio.set = pca955x_gpio_set_value; in pca955x_probe()
773 pca955x->gpio.get = pca955x_gpio_get_value; in pca955x_probe()
774 pca955x->gpio.request = pca955x_gpio_request_pin; in pca955x_probe()
775 pca955x->gpio.free = pca955x_gpio_free_pin; in pca955x_probe()
776 pca955x->gpio.can_sleep = 1; in pca955x_probe()
777 pca955x->gpio.base = -1; in pca955x_probe()
778 pca955x->gpio.ngpio = chip->bits; in pca955x_probe()
779 pca955x->gpio.parent = &client->dev; in pca955x_probe()
780 pca955x->gpio.owner = THIS_MODULE; in pca955x_probe()
782 err = devm_gpiochip_add_data(&client->dev, &pca955x->gpio, in pca955x_probe()
785 /* Use data->gpio.dev as a flag for freeing gpiochip */ in pca955x_probe()
786 pca955x->gpio.parent = NULL; in pca955x_probe()
787 dev_warn(&client->dev, "could not add gpiochip\n"); in pca955x_probe()
790 dev_info(&client->dev, "gpios %i...%i\n", in pca955x_probe()
791 pca955x->gpio.base, pca955x->gpio.base + in pca955x_probe()
792 pca955x->gpio.ngpio - 1); in pca955x_probe()
800 .name = "leds-pca955x",
809 MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");