Lines Matching +full:led +full:- +full:8
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2007-2008 Extreme Engineering Solutions, Inc.
5 * Author: Nate Case <ncase@xes-inc.com>
7 * LED driver for various PCA955x I2C LED drivers
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
19 * Philips PCA955x LED driver chips follow a register map as shown below:
22 * ---------------- -----------
25 * NUM_INPUT_REGS - 1 Last Input register X
32 * NUM_INPUT_REGS + 4 LED selector 0
34 * + NUM_LED_REGS - 1 Last LED selector
53 #include <dt-bindings/leds/leds-pca955x.h>
55 /* LED select registers determine the source that drives LED outputs */
57 #define PCA955X_LS_LED_OFF 0x1 /* Output HI-Z */
77 u8 slv_addr; /* 7-bit slave address mask */
90 .bits = 8,
144 /* 8 bits per input register */
147 return (bits + 7) / 8; in pca955x_num_input_regs()
150 /* 4 bits per LED selector register */
157 * Return an LED selector register value based on an existing one, with
158 * the appropriate 2-bit state value set for the given LED number (0-3).
178 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_write_psc()
181 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_psc()
183 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_psc()
190 * output. LED is OFF when the count is less than the value of this
191 * register, and ON when it is greater. If PWMx == 0, LED is always OFF.
193 * Duty cycle is (256 - PWMx) / 256
197 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_write_pwm()
200 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_pwm()
202 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_pwm()
208 * Write to LED selector register, which determines the source that
209 * drives the LED output.
213 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_write_ls()
216 ret = i2c_smbus_write_byte_data(pca955x->client, cmd, val); in pca955x_write_ls()
218 dev_err(&pca955x->client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", __func__, n, in pca955x_write_ls()
224 * Read the LED selector register, which determines the source that
225 * drives the LED output.
229 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_read_ls()
232 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_ls()
234 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_ls()
243 u8 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_read_pwm()
246 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_pwm()
248 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_pwm()
260 cmd = pca955x_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_read_psc()
261 ret = i2c_smbus_read_byte_data(pca955x->client, cmd); in pca955x_read_psc()
263 dev_err(&pca955x->client->dev, "%s: reg 0x%x, err %d\n", __func__, n, ret); in pca955x_read_psc()
273 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_get()
277 ret = pca955x_read_ls(pca955x, pca955x_led->led_num / 4, &ls); in pca955x_led_get()
281 switch (pca955x_ledstate(ls, pca955x_led->led_num % 4)) { in pca955x_led_get()
293 ret = 255 - pwm; in pca955x_led_get()
304 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_set()
305 int reg = pca955x_led->led_num / 4; in pca955x_led_set()
306 int bit = pca955x_led->led_num % 4; in pca955x_led_set()
310 mutex_lock(&pca955x->lock); in pca955x_led_set()
316 if (test_bit(pca955x_led->led_num, &pca955x->active_blink)) { in pca955x_led_set()
318 clear_bit(pca955x_led->led_num, &pca955x->active_blink); in pca955x_led_set()
340 ret = pca955x_write_pwm(pca955x, 1, 255 - value); in pca955x_led_set()
351 mutex_unlock(&pca955x->lock); in pca955x_led_set()
358 /* psc register value = (blink period * coeff) - 1 */ in pca955x_period_to_psc()
359 period *= pca955x->chipdef->blink_div; in pca955x_period_to_psc()
361 period -= 1; in pca955x_period_to_psc()
373 period /= pca955x->chipdef->blink_div; in pca955x_psc_to_period()
382 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_blink()
386 mutex_lock(&pca955x->lock); in pca955x_led_blink()
390 ret = -EINVAL; in pca955x_led_blink()
396 ret = -EINVAL; in pca955x_led_blink()
400 period = pca955x->active_blink ? pca955x->blink_period : in pca955x_led_blink()
404 if (!pca955x->active_blink || in pca955x_led_blink()
405 pca955x->active_blink == BIT(pca955x_led->led_num) || in pca955x_led_blink()
406 pca955x->blink_period == period) { in pca955x_led_blink()
409 if (!test_and_set_bit(pca955x_led->led_num, in pca955x_led_blink()
410 &pca955x->active_blink)) { in pca955x_led_blink()
412 int reg = pca955x_led->led_num / 4; in pca955x_led_blink()
413 int bit = pca955x_led->led_num % 4; in pca955x_led_blink()
433 if (pca955x->blink_period != period) { in pca955x_led_blink()
434 pca955x->blink_period = period; in pca955x_led_blink()
445 ret = -EBUSY; in pca955x_led_blink()
449 mutex_unlock(&pca955x->lock); in pca955x_led_blink()
463 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_input()
476 return test_and_set_bit(offset, &pca955x->active_pins) ? -EBUSY : 0; in pca955x_gpio_request_pin()
483 clear_bit(offset, &pca955x->active_pins); in pca955x_gpio_free_pin()
490 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_set_value() local
493 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH); in pca955x_set_value()
495 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW); in pca955x_set_value()
507 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_get_value() local
511 pca955x_read_input(pca955x->client, led->led_num / 8, ®); in pca955x_gpio_get_value()
513 return !!(reg & (1 << (led->led_num % 8))); in pca955x_gpio_get_value()
520 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_direction_input() local
523 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT); in pca955x_gpio_direction_input()
537 struct pca955x_led *led; in pca955x_get_pdata() local
541 count = device_get_child_node_count(&client->dev); in pca955x_get_pdata()
542 if (count > chip->bits) in pca955x_get_pdata()
543 return ERR_PTR(-ENODEV); in pca955x_get_pdata()
545 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); in pca955x_get_pdata()
547 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
549 pdata->leds = devm_kcalloc(&client->dev, in pca955x_get_pdata()
550 chip->bits, sizeof(struct pca955x_led), in pca955x_get_pdata()
552 if (!pdata->leds) in pca955x_get_pdata()
553 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
555 device_for_each_child_node(&client->dev, child) { in pca955x_get_pdata()
560 if ((res != 0) || (reg >= chip->bits)) in pca955x_get_pdata()
563 led = &pdata->leds[reg]; in pca955x_get_pdata()
564 led->type = PCA955X_TYPE_LED; in pca955x_get_pdata()
565 led->fwnode = child; in pca955x_get_pdata()
566 led->default_state = led_init_default_state_get(child); in pca955x_get_pdata()
568 fwnode_property_read_u32(child, "type", &led->type); in pca955x_get_pdata()
571 pdata->num_leds = chip->bits; in pca955x_get_pdata()
581 struct led_classdev *led; in pca955x_probe() local
595 return dev_err_probe(&client->dev, -ENODEV, "unknown chip\n"); in pca955x_probe()
597 adapter = client->adapter; in pca955x_probe()
598 pdata = dev_get_platdata(&client->dev); in pca955x_probe()
606 if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) != in pca955x_probe()
607 chip->slv_addr) { in pca955x_probe()
608 dev_err(&client->dev, "invalid slave address %02x\n", in pca955x_probe()
609 client->addr); in pca955x_probe()
610 return -ENODEV; in pca955x_probe()
613 dev_info(&client->dev, "Using %s %u-bit LED driver at slave address 0x%02x\n", in pca955x_probe()
614 client->name, chip->bits, client->addr); in pca955x_probe()
617 return -EIO; in pca955x_probe()
619 if (pdata->num_leds != chip->bits) { in pca955x_probe()
620 dev_err(&client->dev, in pca955x_probe()
621 "board info claims %d LEDs on a %u-bit chip\n", in pca955x_probe()
622 pdata->num_leds, chip->bits); in pca955x_probe()
623 return -ENODEV; in pca955x_probe()
626 pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL); in pca955x_probe()
628 return -ENOMEM; in pca955x_probe()
630 pca955x->leds = devm_kcalloc(&client->dev, chip->bits, in pca955x_probe()
632 if (!pca955x->leds) in pca955x_probe()
633 return -ENOMEM; in pca955x_probe()
637 mutex_init(&pca955x->lock); in pca955x_probe()
638 pca955x->client = client; in pca955x_probe()
639 pca955x->chipdef = chip; in pca955x_probe()
640 pca955x->blink_period = PCA955X_BLINK_DEFAULT_MS; in pca955x_probe()
645 nls = pca955x_num_led_regs(chip->bits); in pca955x_probe()
646 /* Use auto-increment feature to read all the LED selectors at once. */ in pca955x_probe()
648 0x10 | (pca955x_num_input_regs(chip->bits) + 4), nls, in pca955x_probe()
656 for (i = 0; i < chip->bits; i++) { in pca955x_probe()
657 pca955x_led = &pca955x->leds[i]; in pca955x_probe()
658 pca955x_led->led_num = i; in pca955x_probe()
659 pca955x_led->pca955x = pca955x; in pca955x_probe()
660 pca955x_led->type = pdata->leds[i].type; in pca955x_probe()
662 switch (pca955x_led->type) { in pca955x_probe()
669 led = &pca955x_led->led_cdev; in pca955x_probe()
670 led->brightness_set_blocking = pca955x_led_set; in pca955x_probe()
671 led->brightness_get = pca955x_led_get; in pca955x_probe()
672 led->blink_set = pca955x_led_blink; in pca955x_probe()
674 if (pdata->leds[i].default_state == LEDS_DEFSTATE_OFF) in pca955x_probe()
676 else if (pdata->leds[i].default_state == LEDS_DEFSTATE_ON) in pca955x_probe()
680 set_bit(i, &pca955x->active_blink); in pca955x_probe()
683 init_data.fwnode = pdata->leds[i].fwnode; in pca955x_probe()
686 if (to_of_node(init_data.fwnode)->name[0] == in pca955x_probe()
702 err = devm_led_classdev_register_ext(&client->dev, led, in pca955x_probe()
707 set_bit(i, &pca955x->active_pins); in pca955x_probe()
722 psc0 = pca955x_period_to_psc(pca955x, pca955x->blink_period); in pca955x_probe()
729 pca955x->blink_period = pca955x_psc_to_period(pca955x, psc0); in pca955x_probe()
737 pca955x->gpio.label = "gpio-pca955x"; in pca955x_probe()
738 pca955x->gpio.direction_input = pca955x_gpio_direction_input; in pca955x_probe()
739 pca955x->gpio.direction_output = pca955x_gpio_direction_output; in pca955x_probe()
740 pca955x->gpio.set_rv = pca955x_gpio_set_value; in pca955x_probe()
741 pca955x->gpio.get = pca955x_gpio_get_value; in pca955x_probe()
742 pca955x->gpio.request = pca955x_gpio_request_pin; in pca955x_probe()
743 pca955x->gpio.free = pca955x_gpio_free_pin; in pca955x_probe()
744 pca955x->gpio.can_sleep = 1; in pca955x_probe()
745 pca955x->gpio.base = -1; in pca955x_probe()
746 pca955x->gpio.ngpio = chip->bits; in pca955x_probe()
747 pca955x->gpio.parent = &client->dev; in pca955x_probe()
748 pca955x->gpio.owner = THIS_MODULE; in pca955x_probe()
750 err = devm_gpiochip_add_data(&client->dev, &pca955x->gpio, in pca955x_probe()
753 /* Use data->gpio.dev as a flag for freeing gpiochip */ in pca955x_probe()
754 pca955x->gpio.parent = NULL; in pca955x_probe()
755 dev_warn(&client->dev, "could not add gpiochip\n"); in pca955x_probe()
758 dev_info(&client->dev, "gpios %i...%i\n", in pca955x_probe()
759 pca955x->gpio.base, pca955x->gpio.base + in pca955x_probe()
760 pca955x->gpio.ngpio - 1); in pca955x_probe()
770 { "ibm-pca9552", (kernel_ulong_t)&pca955x_chipdefs[ibm_pca9552] },
788 .name = "leds-pca955x",
797 MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");
798 MODULE_DESCRIPTION("PCA955x LED driver");