11  * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
12  * LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
18  * in identical fashion.  The delay_on/delay_off values of the last LED
30 #include <linux/led-class-multicolor.h>
37 /* LED select registers determine the source that drives LED outputs */
38 #define PCA963X_LED_OFF		0x0	/* LED driver off */
39 #define PCA963X_LED_ON		0x1	/* LED driver on */
122 static int pca963x_brightness(struct pca963x_led *led, unsigned int led_num,  in pca963x_brightness()  argument
125 	struct i2c_client *client = led->chip->client;  in pca963x_brightness()
126 	struct pca963x_chipdef *chipdef = led->chip->chipdef;  in pca963x_brightness()
138 		if (led->blinking) {  in pca963x_brightness()
152 		led->blinking = false;  in pca963x_brightness()
162 		if (led->blinking)  in pca963x_brightness()
174 static void pca963x_blink(struct pca963x_led *led)  in pca963x_blink()  argument
176 	struct i2c_client *client = led->chip->client;  in pca963x_blink()
177 	struct pca963x_chipdef *chipdef = led->chip->chipdef;  in pca963x_blink()
181 	ledout_addr = chipdef->ledout_base + (led->led_num / 4);  in pca963x_blink()
182 	shift = 2 * (led->led_num % 4);  in pca963x_blink()
186 	i2c_smbus_write_byte_data(client, chipdef->grppwm, led->gdc);  in pca963x_blink()
188 	i2c_smbus_write_byte_data(client, chipdef->grpfreq, led->gfrq);  in pca963x_blink()
194 	mutex_lock(&led->chip->mutex);  in pca963x_blink()
202 	mutex_unlock(&led->chip->mutex);  in pca963x_blink()
203 	led->blinking = true;  in pca963x_blink()
206 static void pca963x_track_power_state(struct pca963x_led *led, unsigned int led_num,  in pca963x_track_power_state()  argument
209 	unsigned long *leds_on = &led->chip->leds_on;  in pca963x_track_power_state()
217 static int pca963x_sync_power_state(struct pca963x_led *led, unsigned long cached_leds)  in pca963x_sync_power_state()  argument
219 	struct i2c_client *client = led->chip->client;  in pca963x_sync_power_state()
221 	if (!led->chip->leds_on != !cached_leds)  in pca963x_sync_power_state()
223 						 led->chip->leds_on ? 0 : BIT(4));  in pca963x_sync_power_state()
231 	struct pca963x_led *led;  in pca963x_led_set()  local
235 	led = container_of(led_cdev, struct pca963x_led, led_cdev);  in pca963x_led_set()
237 	mutex_lock(&led->chip->mutex);  in pca963x_led_set()
239 	cached_leds = led->chip->leds_on;  in pca963x_led_set()
240 	ret = pca963x_brightness(led, led->led_num, value);  in pca963x_led_set()
244 	pca963x_track_power_state(led, led->led_num, value);  in pca963x_led_set()
245 	ret = pca963x_sync_power_state(led, cached_leds);  in pca963x_led_set()
248 	mutex_unlock(&led->chip->mutex);  in pca963x_led_set()
256 	struct pca963x_led *led = container_of(mc_cdev, struct pca963x_led, mc_cdev);  in pca963x_led_mc_set()  local
262 	guard(mutex)(&led->chip->mutex);  in pca963x_led_mc_set()
264 	cached_leds = led->chip->leds_on;  in pca963x_led_mc_set()
268 		ret = pca963x_brightness(led, channel,  in pca963x_led_mc_set()
273 		pca963x_track_power_state(led, channel,  in pca963x_led_mc_set()
281 	sync_ret = pca963x_sync_power_state(led, cached_leds);  in pca963x_led_mc_set()
286 static unsigned int pca963x_period_scale(struct pca963x_led *led,  in pca963x_period_scale()  argument
289 	unsigned int scaling = led->chip->chipdef->scaling;  in pca963x_period_scale()
298 	struct pca963x_led *led;  in pca963x_blink_set()  local
301 	led = container_of(led_cdev, struct pca963x_led, led_cdev);  in pca963x_blink_set()
312 	period = pca963x_period_scale(led, time_on + time_off);  in pca963x_blink_set()
319 		period = pca963x_period_scale(led, 1000);  in pca963x_blink_set()
327 	gdc = (pca963x_period_scale(led, time_on) * 256) / period;  in pca963x_blink_set()
336 	led->gdc = gdc;  in pca963x_blink_set()
337 	led->gfrq = gfrq;  in pca963x_blink_set()
339 	pca963x_blink(led);  in pca963x_blink_set()
340 	led->led_cdev.brightness = LED_FULL;  in pca963x_blink_set()
349 static int pca963x_parse_mc_subleds(struct device *dev, struct pca963x_led *led,  in pca963x_parse_mc_subleds()  argument
359 		if (num_colors >= ARRAY_SIZE(led->subleds))  in pca963x_parse_mc_subleds()
364 			return dev_err_probe(dev, ret, "Missing 'reg' for sub-LED %pfw\n", sub);  in pca963x_parse_mc_subleds()
366 			return dev_err_probe(dev, -EINVAL, "Invalid 'reg' for sub-LED %pfw\n", sub);  in pca963x_parse_mc_subleds()
370 			return dev_err_probe(dev, ret, "Missing 'color' for sub-LED %pfw\n", sub);  in pca963x_parse_mc_subleds()
372 		led->subleds[num_colors].channel = subreg;  in pca963x_parse_mc_subleds()
373 		led->subleds[num_colors].color_index = color;  in pca963x_parse_mc_subleds()
374 		led->subleds[num_colors].intensity = LED_FULL;  in pca963x_parse_mc_subleds()
378 	led->mc_cdev.subled_info = led->subleds;  in pca963x_parse_mc_subleds()
379 	led->mc_cdev.num_colors = num_colors;  in pca963x_parse_mc_subleds()
380 	led->mc_cdev.led_cdev.max_brightness = LED_FULL;  in pca963x_parse_mc_subleds()
381 	led->mc_cdev.led_cdev.brightness_set_blocking = pca963x_led_mc_set;  in pca963x_parse_mc_subleds()
386 static int pca963x_register_led(struct device *dev, struct pca963x_led *led,  in pca963x_register_led()  argument
391 	struct i2c_client *client = led->chip->client;  in pca963x_register_led()
396 	led->led_num = reg;  in pca963x_register_led()
398 	/* A node with sub-children groups several channels into a multicolor LED. */  in pca963x_register_led()
399 	led->is_mc = fwnode_get_child_node_count(fwnode) > 0;  in pca963x_register_led()
401 	if (led->is_mc) {  in pca963x_register_led()
402 		ret = pca963x_parse_mc_subleds(dev, led, fwnode, chipdef);  in pca963x_register_led()
406 		led->led_cdev.brightness_set_blocking = pca963x_led_set;  in pca963x_register_led()
408 			led->led_cdev.blink_set = pca963x_blink_set;  in pca963x_register_led()
412 	/* Keep the legacy device name to preserve existing sysfs LED names. */  in pca963x_register_led()
417 	if (led->is_mc)  in pca963x_register_led()
418 		return devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev,  in pca963x_register_led()
421 	return devm_led_classdev_register_ext(dev, &led->led_cdev, &init_data);  in pca963x_register_led()
428 	struct pca963x_led *led = chip->leds;  in pca963x_register_leds()  local
470 		led->chip = chip;  in pca963x_register_leds()
471 		led->blinking = false;  in pca963x_register_leds()
473 		ret = pca963x_register_led(dev, led, reg, child, chipdef, hw_blink);  in pca963x_register_leds()
475 			return dev_err_probe(dev, ret, "Failed to register LED for node %pfw\n",  in pca963x_register_leds()
478 		++led;  in pca963x_register_leds()
550 	/* Disable LED all-call address, and power down initially */  in pca963x_probe()
569 MODULE_DESCRIPTION("PCA963X LED driver");