94 static bool pca9685_prescaler_can_change(struct pca9685 *pca, int channel)  in pca9685_prescaler_can_change()  argument
97 	if (bitmap_empty(pca->pwms_enabled, PCA9685_MAXCHAN + 1))  in pca9685_prescaler_can_change()
100 	if (bitmap_weight(pca->pwms_enabled, PCA9685_MAXCHAN + 1) > 1)  in pca9685_prescaler_can_change()
106 	return test_bit(channel, pca->pwms_enabled);  in pca9685_prescaler_can_change()
111 	struct pca9685 *pca = to_pca(chip);  in pca9685_read_reg()  local
115 	err = regmap_read(pca->regmap, reg, val);  in pca9685_read_reg()
124 	struct pca9685 *pca = to_pca(chip);  in pca9685_write_reg()  local
128 	err = regmap_write(pca->regmap, reg, val);  in pca9685_write_reg()
212 static bool pca9685_pwm_test_and_set_inuse(struct pca9685 *pca, int pwm_idx)  in pca9685_pwm_test_and_set_inuse()  argument
216 	mutex_lock(&pca->lock);  in pca9685_pwm_test_and_set_inuse()
222 		if (!bitmap_empty(pca->pwms_inuse, PCA9685_MAXCHAN)) {  in pca9685_pwm_test_and_set_inuse()
231 		if (test_bit(PCA9685_MAXCHAN, pca->pwms_inuse)) {  in pca9685_pwm_test_and_set_inuse()
236 	is_inuse = test_and_set_bit(pwm_idx, pca->pwms_inuse);  in pca9685_pwm_test_and_set_inuse()
238 	mutex_unlock(&pca->lock);  in pca9685_pwm_test_and_set_inuse()
242 static void pca9685_pwm_clear_inuse(struct pca9685 *pca, int pwm_idx)  in pca9685_pwm_clear_inuse()  argument
244 	mutex_lock(&pca->lock);  in pca9685_pwm_clear_inuse()
245 	clear_bit(pwm_idx, pca->pwms_inuse);  in pca9685_pwm_clear_inuse()
246 	mutex_unlock(&pca->lock);  in pca9685_pwm_clear_inuse()
252 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_gpio_request()  local
254 	if (pca9685_pwm_test_and_set_inuse(pca, offset))  in pca9685_pwm_gpio_request()
278 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_gpio_free()  local
282 	pca9685_pwm_clear_inuse(pca, offset);  in pca9685_pwm_gpio_free()
314 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_gpio_probe()  local
317 	pca->gpio.label = dev_name(dev);  in pca9685_pwm_gpio_probe()
318 	pca->gpio.parent = dev;  in pca9685_pwm_gpio_probe()
319 	pca->gpio.request = pca9685_pwm_gpio_request;  in pca9685_pwm_gpio_probe()
320 	pca->gpio.free = pca9685_pwm_gpio_free;  in pca9685_pwm_gpio_probe()
321 	pca->gpio.get_direction = pca9685_pwm_gpio_get_direction;  in pca9685_pwm_gpio_probe()
322 	pca->gpio.direction_input = pca9685_pwm_gpio_direction_input;  in pca9685_pwm_gpio_probe()
323 	pca->gpio.direction_output = pca9685_pwm_gpio_direction_output;  in pca9685_pwm_gpio_probe()
324 	pca->gpio.get = pca9685_pwm_gpio_get;  in pca9685_pwm_gpio_probe()
325 	pca->gpio.set = pca9685_pwm_gpio_set;  in pca9685_pwm_gpio_probe()
326 	pca->gpio.base = -1;  in pca9685_pwm_gpio_probe()
327 	pca->gpio.ngpio = PCA9685_MAXCHAN;  in pca9685_pwm_gpio_probe()
328 	pca->gpio.can_sleep = true;  in pca9685_pwm_gpio_probe()
330 	return devm_gpiochip_add_data(dev, &pca->gpio, chip);  in pca9685_pwm_gpio_probe()
333 static inline bool pca9685_pwm_test_and_set_inuse(struct pca9685 *pca,  in pca9685_pwm_test_and_set_inuse()  argument
340 pca9685_pwm_clear_inuse(struct pca9685 *pca, int pwm_idx)  in pca9685_pwm_clear_inuse()  argument
353 	struct pca9685 *pca = to_pca(chip);  in pca9685_set_sleep_mode()  local
354 	int err = regmap_update_bits(pca->regmap, PCA9685_MODE1,  in pca9685_set_sleep_mode()
371 	struct pca9685 *pca = to_pca(chip);  in __pca9685_pwm_apply()  local
392 		if (!pca9685_prescaler_can_change(pca, pwm->hwpwm)) {  in __pca9685_pwm_apply()
423 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_apply()  local
426 	mutex_lock(&pca->lock);  in pca9685_pwm_apply()
430 			set_bit(pwm->hwpwm, pca->pwms_enabled);  in pca9685_pwm_apply()
432 			clear_bit(pwm->hwpwm, pca->pwms_enabled);  in pca9685_pwm_apply()
434 	mutex_unlock(&pca->lock);  in pca9685_pwm_apply()
477 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_request()  local
479 	if (pca9685_pwm_test_and_set_inuse(pca, pwm->hwpwm))  in pca9685_pwm_request()
484 		mutex_lock(&pca->lock);  in pca9685_pwm_request()
485 		set_bit(pwm->hwpwm, pca->pwms_enabled);  in pca9685_pwm_request()
486 		mutex_unlock(&pca->lock);  in pca9685_pwm_request()
496 	struct pca9685 *pca = to_pca(chip);  in pca9685_pwm_free()  local
498 	mutex_lock(&pca->lock);  in pca9685_pwm_free()
500 	clear_bit(pwm->hwpwm, pca->pwms_enabled);  in pca9685_pwm_free()
501 	mutex_unlock(&pca->lock);  in pca9685_pwm_free()
504 	pca9685_pwm_clear_inuse(pca, pwm->hwpwm);  in pca9685_pwm_free()
524 	struct pca9685 *pca;  in pca9685_pwm_probe()  local
529 	chip = devm_pwmchip_alloc(&client->dev, PCA9685_MAXCHAN + 1, sizeof(*pca));  in pca9685_pwm_probe()
532 	pca = to_pca(chip);  in pca9685_pwm_probe()
534 	pca->regmap = devm_regmap_init_i2c(client, &pca9685_regmap_i2c_config);  in pca9685_pwm_probe()
535 	if (IS_ERR(pca->regmap)) {  in pca9685_pwm_probe()
536 		ret = PTR_ERR(pca->regmap);  in pca9685_pwm_probe()
544 	mutex_init(&pca->lock);  in pca9685_pwm_probe()