Lines Matching +full:ls +full:- +full:bits
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
37 * bits the chip supports.
53 #include <dt-bindings/leds/leds-pca955x.h>
57 #define PCA955X_LS_LED_OFF 0x1 /* Output HI-Z */
74 int bits; member
75 u8 slv_addr; /* 7-bit slave address mask */
76 int slv_addr_shift; /* Number of bits to ignore */
81 .bits = 2,
86 .bits = 8,
91 .bits = 16,
96 .bits = 16,
101 .bits = 4,
111 { "ibm-pca9552", ibm_pca9552 },
142 /* 8 bits per input register */
143 static inline int pca95xx_num_input_regs(int bits) in pca95xx_num_input_regs() argument
145 return (bits + 7) / 8; in pca95xx_num_input_regs()
150 * the appropriate 2-bit state value set for the given LED number (0-3).
165 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + (2 * n); in pca955x_write_psc()
170 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_psc()
180 * Duty cycle is (256 - PWMx) / 256
185 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_write_pwm()
190 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_pwm()
202 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_write_ls()
207 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", in pca955x_write_ls()
219 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n; in pca955x_read_ls()
224 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_ls()
235 u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n); in pca955x_read_pwm()
240 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_pwm()
253 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_get()
254 u8 ls, pwm; in pca955x_led_get() local
257 ret = pca955x_read_ls(pca955x->client, pca955x_led->led_num / 4, &ls); in pca955x_led_get()
261 ls = (ls >> ((pca955x_led->led_num % 4) << 1)) & 0x3; in pca955x_led_get()
262 switch (ls) { in pca955x_led_get()
273 ret = pca955x_read_pwm(pca955x->client, 1, &pwm); in pca955x_led_get()
276 ret = 255 - pwm; in pca955x_led_get()
288 u8 ls; in pca955x_led_set() local
289 int chip_ls; /* which LSx to use (0-3 potentially) */ in pca955x_led_set()
290 int ls_led; /* which set of bits within LSx to use (0-3) */ in pca955x_led_set()
294 pca955x = pca955x_led->pca955x; in pca955x_led_set()
296 chip_ls = pca955x_led->led_num / 4; in pca955x_led_set()
297 ls_led = pca955x_led->led_num % 4; in pca955x_led_set()
299 mutex_lock(&pca955x->lock); in pca955x_led_set()
301 ret = pca955x_read_ls(pca955x->client, chip_ls, &ls); in pca955x_led_set()
307 ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_ON); in pca955x_led_set()
310 ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_OFF); in pca955x_led_set()
313 ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK0); in pca955x_led_set()
323 ret = pca955x_write_pwm(pca955x->client, 1, 255 - value); in pca955x_led_set()
326 ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK1); in pca955x_led_set()
330 ret = pca955x_write_ls(pca955x->client, chip_ls, ls); in pca955x_led_set()
333 mutex_unlock(&pca955x->lock); in pca955x_led_set()
347 dev_err(&client->dev, "%s: reg 0x%x, err %d\n", in pca955x_read_input()
360 return test_and_set_bit(offset, &pca955x->active_pins) ? -EBUSY : 0; in pca955x_gpio_request_pin()
367 clear_bit(offset, &pca955x->active_pins); in pca955x_gpio_free_pin()
374 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_set_value()
377 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH); in pca955x_set_value()
379 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW); in pca955x_set_value()
391 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_get_value()
395 pca955x_read_input(pca955x->client, led->led_num / 8, ®); in pca955x_gpio_get_value()
397 return !!(reg & (1 << (led->led_num % 8))); in pca955x_gpio_get_value()
404 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_direction_input()
407 return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT); in pca955x_gpio_direction_input()
425 count = device_get_child_node_count(&client->dev); in pca955x_get_pdata()
426 if (count > chip->bits) in pca955x_get_pdata()
427 return ERR_PTR(-ENODEV); in pca955x_get_pdata()
429 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); in pca955x_get_pdata()
431 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
433 pdata->leds = devm_kcalloc(&client->dev, in pca955x_get_pdata()
434 chip->bits, sizeof(struct pca955x_led), in pca955x_get_pdata()
436 if (!pdata->leds) in pca955x_get_pdata()
437 return ERR_PTR(-ENOMEM); in pca955x_get_pdata()
439 device_for_each_child_node(&client->dev, child) { in pca955x_get_pdata()
444 if ((res != 0) || (reg >= chip->bits)) in pca955x_get_pdata()
447 led = &pdata->leds[reg]; in pca955x_get_pdata()
448 led->type = PCA955X_TYPE_LED; in pca955x_get_pdata()
449 led->fwnode = child; in pca955x_get_pdata()
450 led->default_state = led_init_default_state_get(child); in pca955x_get_pdata()
452 fwnode_property_read_u32(child, "type", &led->type); in pca955x_get_pdata()
455 pdata->num_leds = chip->bits; in pca955x_get_pdata()
484 const void *md = device_get_match_data(&client->dev); in pca955x_probe()
493 chip_type = (enum pca955x_type)id->driver_data; in pca955x_probe()
495 dev_err(&client->dev, "unknown chip\n"); in pca955x_probe()
496 return -ENODEV; in pca955x_probe()
501 adapter = client->adapter; in pca955x_probe()
502 pdata = dev_get_platdata(&client->dev); in pca955x_probe()
510 if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) != in pca955x_probe()
511 chip->slv_addr) { in pca955x_probe()
512 dev_err(&client->dev, "invalid slave address %02x\n", in pca955x_probe()
513 client->addr); in pca955x_probe()
514 return -ENODEV; in pca955x_probe()
517 dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at " in pca955x_probe()
518 "slave address 0x%02x\n", client->name, chip->bits, in pca955x_probe()
519 client->addr); in pca955x_probe()
522 return -EIO; in pca955x_probe()
524 if (pdata->num_leds != chip->bits) { in pca955x_probe()
525 dev_err(&client->dev, in pca955x_probe()
526 "board info claims %d LEDs on a %d-bit chip\n", in pca955x_probe()
527 pdata->num_leds, chip->bits); in pca955x_probe()
528 return -ENODEV; in pca955x_probe()
531 pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL); in pca955x_probe()
533 return -ENOMEM; in pca955x_probe()
535 pca955x->leds = devm_kcalloc(&client->dev, chip->bits, in pca955x_probe()
537 if (!pca955x->leds) in pca955x_probe()
538 return -ENOMEM; in pca955x_probe()
542 mutex_init(&pca955x->lock); in pca955x_probe()
543 pca955x->client = client; in pca955x_probe()
544 pca955x->chipdef = chip; in pca955x_probe()
549 for (i = 0; i < chip->bits; i++) { in pca955x_probe()
550 pca955x_led = &pca955x->leds[i]; in pca955x_probe()
551 pca955x_led->led_num = i; in pca955x_probe()
552 pca955x_led->pca955x = pca955x; in pca955x_probe()
553 pca955x_led->type = pdata->leds[i].type; in pca955x_probe()
555 switch (pca955x_led->type) { in pca955x_probe()
560 led = &pca955x_led->led_cdev; in pca955x_probe()
561 led->brightness_set_blocking = pca955x_led_set; in pca955x_probe()
562 led->brightness_get = pca955x_led_get; in pca955x_probe()
564 if (pdata->leds[i].default_state == LEDS_DEFSTATE_OFF) { in pca955x_probe()
568 } else if (pdata->leds[i].default_state == LEDS_DEFSTATE_ON) { in pca955x_probe()
574 init_data.fwnode = pdata->leds[i].fwnode; in pca955x_probe()
577 if (to_of_node(init_data.fwnode)->name[0] == in pca955x_probe()
594 err = devm_led_classdev_register_ext(&client->dev, led, in pca955x_probe()
599 set_bit(i, &pca955x->active_pins); in pca955x_probe()
602 * For default-state == "keep", let the core update the in pca955x_probe()
607 if (pdata->leds[i].default_state == LEDS_DEFSTATE_KEEP) { in pca955x_probe()
608 if (led->brightness != LED_FULL && in pca955x_probe()
609 led->brightness != LED_OFF && in pca955x_probe()
610 led->brightness != LED_HALF) in pca955x_probe()
617 err = pca955x_write_pwm(client, 0, 255 - LED_HALF); in pca955x_probe()
637 pca955x->gpio.label = "gpio-pca955x"; in pca955x_probe()
638 pca955x->gpio.direction_input = pca955x_gpio_direction_input; in pca955x_probe()
639 pca955x->gpio.direction_output = pca955x_gpio_direction_output; in pca955x_probe()
640 pca955x->gpio.set = pca955x_gpio_set_value; in pca955x_probe()
641 pca955x->gpio.get = pca955x_gpio_get_value; in pca955x_probe()
642 pca955x->gpio.request = pca955x_gpio_request_pin; in pca955x_probe()
643 pca955x->gpio.free = pca955x_gpio_free_pin; in pca955x_probe()
644 pca955x->gpio.can_sleep = 1; in pca955x_probe()
645 pca955x->gpio.base = -1; in pca955x_probe()
646 pca955x->gpio.ngpio = chip->bits; in pca955x_probe()
647 pca955x->gpio.parent = &client->dev; in pca955x_probe()
648 pca955x->gpio.owner = THIS_MODULE; in pca955x_probe()
650 err = devm_gpiochip_add_data(&client->dev, &pca955x->gpio, in pca955x_probe()
653 /* Use data->gpio.dev as a flag for freeing gpiochip */ in pca955x_probe()
654 pca955x->gpio.parent = NULL; in pca955x_probe()
655 dev_warn(&client->dev, "could not add gpiochip\n"); in pca955x_probe()
658 dev_info(&client->dev, "gpios %i...%i\n", in pca955x_probe()
659 pca955x->gpio.base, pca955x->gpio.base + in pca955x_probe()
660 pca955x->gpio.ngpio - 1); in pca955x_probe()
668 .name = "leds-pca955x",
677 MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");