Lines Matching full:pca955x
7 * LED driver for various PCA955x I2C LED drivers
19 * Philips PCA955x LED driver chips follow a register map as shown below:
53 #include <dt-bindings/leds/leds-pca955x.h>
115 struct pca955x { struct
129 struct pca955x *pca955x; argument
176 static int pca955x_write_psc(struct pca955x *pca955x, int n, u8 val) in pca955x_write_psc() argument
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()
195 static int pca955x_write_pwm(struct pca955x *pca955x, int n, u8 val) in pca955x_write_pwm() argument
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()
211 static int pca955x_write_ls(struct pca955x *pca955x, int n, u8 val) in pca955x_write_ls() argument
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()
227 static int pca955x_read_ls(struct pca955x *pca955x, int n, u8 *val) in pca955x_read_ls() argument
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()
241 static int pca955x_read_pwm(struct pca955x *pca955x, int n, u8 *val) in pca955x_read_pwm() argument
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()
255 static int pca955x_read_psc(struct pca955x *pca955x, int n, u8 *val) in pca955x_read_psc() argument
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() local
277 ret = pca955x_read_ls(pca955x, pca955x_led->led_num / 4, &ls); in pca955x_led_get()
290 ret = pca955x_read_pwm(pca955x, 1, &pwm); in pca955x_led_get()
304 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_set() local
310 mutex_lock(&pca955x->lock); in pca955x_led_set()
312 ret = pca955x_read_ls(pca955x, reg, &ls); 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()
348 ret = pca955x_write_ls(pca955x, reg, ls); in pca955x_led_set()
351 mutex_unlock(&pca955x->lock); in pca955x_led_set()
356 static u8 pca955x_period_to_psc(struct pca955x *pca955x, unsigned long period) in pca955x_period_to_psc() argument
359 period *= pca955x->chipdef->blink_div; in pca955x_period_to_psc()
366 static unsigned long pca955x_psc_to_period(struct pca955x *pca955x, u8 psc) in pca955x_psc_to_period() argument
373 period /= pca955x->chipdef->blink_div; in pca955x_psc_to_period()
382 struct pca955x *pca955x = pca955x_led->pca955x; in pca955x_led_blink() local
386 mutex_lock(&pca955x->lock); in pca955x_led_blink()
394 if (period < pca955x_psc_to_period(pca955x, 0) || in pca955x_led_blink()
395 period > pca955x_psc_to_period(pca955x, 0xff)) { 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()
407 u8 psc = pca955x_period_to_psc(pca955x, period); in pca955x_led_blink()
410 &pca955x->active_blink)) { in pca955x_led_blink()
415 ret = pca955x_read_ls(pca955x, reg, &ls); in pca955x_led_blink()
420 ret = pca955x_write_ls(pca955x, reg, ls); in pca955x_led_blink()
428 ret = pca955x_write_pwm(pca955x, 0, 128); in pca955x_led_blink()
433 if (pca955x->blink_period != period) { in pca955x_led_blink()
434 pca955x->blink_period = period; in pca955x_led_blink()
435 ret = pca955x_write_psc(pca955x, 0, psc); in pca955x_led_blink()
440 period = pca955x_psc_to_period(pca955x, psc); in pca955x_led_blink()
449 mutex_unlock(&pca955x->lock); in pca955x_led_blink()
474 struct pca955x *pca955x = gpiochip_get_data(gc); in pca955x_gpio_request_pin() local
476 return test_and_set_bit(offset, &pca955x->active_pins) ? -EBUSY : 0; in pca955x_gpio_request_pin()
481 struct pca955x *pca955x = gpiochip_get_data(gc); in pca955x_gpio_free_pin() local
483 clear_bit(offset, &pca955x->active_pins); in pca955x_gpio_free_pin()
489 struct pca955x *pca955x = gpiochip_get_data(gc); in pca955x_set_value() local
490 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_set_value()
506 struct pca955x *pca955x = gpiochip_get_data(gc); in pca955x_gpio_get_value() local
507 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_get_value()
511 pca955x_read_input(pca955x->client, led->led_num / 8, ®); in pca955x_gpio_get_value()
519 struct pca955x *pca955x = gpiochip_get_data(gc); in pca955x_gpio_direction_input() local
520 struct pca955x_led *led = &pca955x->leds[offset]; in pca955x_gpio_direction_input()
578 struct pca955x *pca955x; in pca955x_probe() local
626 pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL); in pca955x_probe()
627 if (!pca955x) in pca955x_probe()
630 pca955x->leds = devm_kcalloc(&client->dev, chip->bits, in pca955x_probe()
632 if (!pca955x->leds) in pca955x_probe()
635 i2c_set_clientdata(client, pca955x); 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()
643 init_data.devicename = "pca955x"; in pca955x_probe()
657 pca955x_led = &pca955x->leds[i]; in pca955x_probe()
659 pca955x_led->pca955x = pca955x; in pca955x_probe()
680 set_bit(i, &pca955x->active_blink); in pca955x_probe()
707 set_bit(i, &pca955x->active_pins); in pca955x_probe()
713 err = pca955x_write_ls(pca955x, i, ls2[i]); in pca955x_probe()
720 err = pca955x_read_psc(pca955x, 0, &psc0); in pca955x_probe()
722 psc0 = pca955x_period_to_psc(pca955x, pca955x->blink_period); in pca955x_probe()
723 err = pca955x_write_psc(pca955x, 0, psc0); in pca955x_probe()
729 pca955x->blink_period = pca955x_psc_to_period(pca955x, psc0); in pca955x_probe()
732 err = pca955x_write_psc(pca955x, 1, 0); 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 = 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()
751 pca955x); in pca955x_probe()
754 pca955x->gpio.parent = NULL; in pca955x_probe()
759 pca955x->gpio.base, pca955x->gpio.base + in pca955x_probe()
760 pca955x->gpio.ngpio - 1); in pca955x_probe()
788 .name = "leds-pca955x",
798 MODULE_DESCRIPTION("PCA955x LED driver");