Lines Matching +full:gpio +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
34 * + NUM_LED_REGS - 1 Last LED selector
43 #include <linux/gpio/driver.h>
45 #include <linux/leds.h>
52 #include <dt-bindings/leds/leds-pca955x.h>
56 #define PCA955X_LS_LED_OFF 0x1 /* Output HI-Z */
74 u8 slv_addr; /* 7-bit slave address mask */
110 { "ibm-pca9552", ibm_pca9552 },
118 struct pca955x_led *leds; member
122 struct gpio_chip gpio; member
136 struct pca955x_led *leds; member
154 * the appropriate 2-bit state value set for the given LED number (0-3).
169 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_write_psc()
174 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_psc()
184 * Duty cycle is (256 - PWMx) / 256
189 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_write_pwm()
194 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_pwm()
206 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_write_ls()
211 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_ls()
223 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_read_ls()
228 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_ls()
239 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_read_pwm()
244 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_pwm()
257 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_get()
261 ret = pca955x_read_ls(pca955x->client, pca955x_led->led_num / 4, &ls); in pca955x_led_get()
265 ls = (ls >> ((pca955x_led->led_num % 4) << 1)) & 0x3; in pca955x_led_get()
277 ret = pca955x_read_pwm(pca955x->client, 1, &pwm); in pca955x_led_get()
280 ret = 255 - pwm; in pca955x_led_get()
293 int chip_ls; /* which LSx to use (0-3 potentially) */ in pca955x_led_set()
294 int ls_led; /* which set of bits within LSx to use (0-3) */ in pca955x_led_set()
298 pca955x = pca955x_led->pca955x; in pca955x_led_set()
300 chip_ls = pca955x_led->led_num / 4; in pca955x_led_set()
301 ls_led = pca955x_led->led_num % 4; in pca955x_led_set()
303 mutex_lock(&pca955x->lock); in pca955x_led_set()
305 ret = pca955x_read_ls(pca955x->client, chip_ls, &ls); in pca955x_led_set()
322 * side effect of making all LEDs on the chip share the in pca955x_led_set()
327 ret = pca955x_write_pwm(pca955x->client, 1, 255 - value); in pca955x_led_set()
334 ret = pca955x_write_ls(pca955x->client, chip_ls, ls); in pca955x_led_set()
337 mutex_unlock(&pca955x->lock); in pca955x_led_set()
344 * Read the INPUT register, which contains the state of LEDs.
351 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_input()
363 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_request_pin()
365 if (led->type == PCA955X_TYPE_GPIO) in pca955x_gpio_request_pin()
368 return -EBUSY; in pca955x_gpio_request_pin()
375 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_set_value()
378 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH); in pca955x_set_value()
380 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW); in pca955x_set_value()
392 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_get_value()
396 pca955x_read_input(pca955x->client, led->led_num / 8, ®); in pca955x_gpio_get_value()
398 return !!(reg & (1 << (led->led_num % 8))); in pca955x_gpio_get_value()
405 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_direction_input()
408 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT); in pca955x_gpio_direction_input()
426 count = device_get_child_node_count(&client->dev); in pca955x_get_pdata()
427 if (!count || count > chip->bits) in pca955x_get_pdata()
428 return ERR_PTR(-ENODEV); in pca955x_get_pdata()
430 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); in pca955x_get_pdata()
432 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
434 pdata->leds = devm_kcalloc(&client->dev, in pca955x_get_pdata()
435 chip->bits, sizeof(struct pca955x_led), in pca955x_get_pdata()
437 if (!pdata->leds) in pca955x_get_pdata()
438 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
440 device_for_each_child_node(&client->dev, child) { in pca955x_get_pdata()
446 if ((res != 0) || (reg >= chip->bits)) in pca955x_get_pdata()
449 led = &pdata->leds[reg]; in pca955x_get_pdata()
450 led->type = PCA955X_TYPE_LED; in pca955x_get_pdata()
451 led->fwnode = child; in pca955x_get_pdata()
452 fwnode_property_read_u32(child, "type", &led->type); in pca955x_get_pdata()
454 if (!fwnode_property_read_string(child, "default-state", in pca955x_get_pdata()
457 led->default_state = LEDS_GPIO_DEFSTATE_KEEP; in pca955x_get_pdata()
459 led->default_state = LEDS_GPIO_DEFSTATE_ON; in pca955x_get_pdata()
461 led->default_state = LEDS_GPIO_DEFSTATE_OFF; in pca955x_get_pdata()
463 led->default_state = LEDS_GPIO_DEFSTATE_OFF; in pca955x_get_pdata()
467 pdata->num_leds = chip->bits; in pca955x_get_pdata()
497 const void *md = device_get_match_data(&client->dev); in pca955x_probe()
506 chip_type = (enum pca955x_type)id->driver_data; in pca955x_probe()
508 dev_err(&client->dev, "unknown chip\n"); in pca955x_probe()
509 return -ENODEV; in pca955x_probe()
514 adapter = client->adapter; in pca955x_probe()
515 pdata = dev_get_platdata(&client->dev); in pca955x_probe()
523 if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) != in pca955x_probe()
524 chip->slv_addr) { in pca955x_probe()
525 dev_err(&client->dev, "invalid slave address %02x\n", in pca955x_probe()
526 client->addr); in pca955x_probe()
527 return -ENODEV; in pca955x_probe()
530 dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at " in pca955x_probe()
531 "slave address 0x%02x\n", client->name, chip->bits, in pca955x_probe()
532 client->addr); in pca955x_probe()
535 return -EIO; in pca955x_probe()
537 if (pdata->num_leds != chip->bits) { in pca955x_probe()
538 dev_err(&client->dev, in pca955x_probe()
539 "board info claims %d LEDs on a %d-bit chip\n", in pca955x_probe()
540 pdata->num_leds, chip->bits); in pca955x_probe()
541 return -ENODEV; in pca955x_probe()
544 pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL); in pca955x_probe()
546 return -ENOMEM; in pca955x_probe()
548 pca955x->leds = devm_kcalloc(&client->dev, chip->bits, in pca955x_probe()
550 if (!pca955x->leds) in pca955x_probe()
551 return -ENOMEM; in pca955x_probe()
555 mutex_init(&pca955x->lock); in pca955x_probe()
556 pca955x->client = client; in pca955x_probe()
557 pca955x->chipdef = chip; in pca955x_probe()
562 for (i = 0; i < chip->bits; i++) { in pca955x_probe()
563 pca955x_led = &pca955x->leds[i]; in pca955x_probe()
564 pca955x_led->led_num = i; in pca955x_probe()
565 pca955x_led->pca955x = pca955x; in pca955x_probe()
566 pca955x_led->type = pdata->leds[i].type; in pca955x_probe()
568 switch (pca955x_led->type) { in pca955x_probe()
575 led = &pca955x_led->led_cdev; in pca955x_probe()
576 led->brightness_set_blocking = pca955x_led_set; in pca955x_probe()
577 led->brightness_get = pca955x_led_get; in pca955x_probe()
579 if (pdata->leds[i].default_state == in pca955x_probe()
584 } else if (pdata->leds[i].default_state == in pca955x_probe()
591 init_data.fwnode = pdata->leds[i].fwnode; in pca955x_probe()
594 if (to_of_node(init_data.fwnode)->name[0] == in pca955x_probe()
611 err = devm_led_classdev_register_ext(&client->dev, led, in pca955x_probe()
617 * For default-state == "keep", let the core update the in pca955x_probe()
622 if (pdata->leds[i].default_state == in pca955x_probe()
624 if (led->brightness != LED_FULL && in pca955x_probe()
625 led->brightness != LED_OFF && in pca955x_probe()
626 led->brightness != LED_HALF) in pca955x_probe()
633 err = pca955x_write_pwm(client, 0, 255 - LED_HALF); in pca955x_probe()
654 pca955x->gpio.label = "gpio-pca955x"; in pca955x_probe()
655 pca955x->gpio.direction_input = pca955x_gpio_direction_input; in pca955x_probe()
656 pca955x->gpio.direction_output = pca955x_gpio_direction_output; in pca955x_probe()
657 pca955x->gpio.set = pca955x_gpio_set_value; in pca955x_probe()
658 pca955x->gpio.get = pca955x_gpio_get_value; in pca955x_probe()
659 pca955x->gpio.request = pca955x_gpio_request_pin; in pca955x_probe()
660 pca955x->gpio.can_sleep = 1; in pca955x_probe()
661 pca955x->gpio.base = -1; in pca955x_probe()
662 pca955x->gpio.ngpio = ngpios; in pca955x_probe()
663 pca955x->gpio.parent = &client->dev; in pca955x_probe()
664 pca955x->gpio.owner = THIS_MODULE; in pca955x_probe()
666 err = devm_gpiochip_add_data(&client->dev, &pca955x->gpio, in pca955x_probe()
669 /* Use data->gpio.dev as a flag for freeing gpiochip */ in pca955x_probe()
670 pca955x->gpio.parent = NULL; in pca955x_probe()
671 dev_warn(&client->dev, "could not add gpiochip\n"); in pca955x_probe()
674 dev_info(&client->dev, "gpios %i...%i\n", in pca955x_probe()
675 pca955x->gpio.base, pca955x->gpio.base + in pca955x_probe()
676 pca955x->gpio.ngpio - 1); in pca955x_probe()
685 .name = "leds-pca955x",
694 MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");