1 // SPDX-License-Identifier: GPL-2.0-only
3  * NCP5623 Multi-LED Driver
6  * Datasheet: https://www.onsemi.com/pdf/datasheet/ncp5623-d.pdf
12 #include <linux/led-class-multicolor.h>
28 struct ncp5623 {  struct
46 	struct ncp5623 *ncp = container_of(mc_cdev, struct ncp5623, mc_dev);  in ncp5623_brightness_set()  argument
49 	guard(mutex)(&ncp->lock);  in ncp5623_brightness_set()
51 	if (ncp->delay && time_is_after_jiffies(ncp->delay))  in ncp5623_brightness_set()
52 		return -EBUSY;  in ncp5623_brightness_set()
54 	ncp->delay = 0;  in ncp5623_brightness_set()
56 	for (int i = 0; i < mc_cdev->num_colors; i++) {  in ncp5623_brightness_set()
57 		ret = ncp5623_write(ncp->client,  in ncp5623_brightness_set()
58 				    NCP5623_PWM_REG(mc_cdev->subled_info[i].channel),  in ncp5623_brightness_set()
59 				    min(mc_cdev->subled_info[i].intensity,  in ncp5623_brightness_set()
65 	ret = ncp5623_write(ncp->client, NCP5623_DIMMING_TIME_REG, 0);  in ncp5623_brightness_set()
69 	ret = ncp5623_write(ncp->client, NCP5623_ILED_REG, brightness);  in ncp5623_brightness_set()
73 	ncp->current_brightness = brightness;  in ncp5623_brightness_set()
83 	struct ncp5623 *ncp = container_of(mc_cdev, struct ncp5623, mc_dev);  in ncp5623_pattern_set()
88 	guard(mutex)(&ncp->lock);  in ncp5623_pattern_set()
90 	if (ncp->delay && time_is_after_jiffies(ncp->delay))  in ncp5623_pattern_set()
91 		return -EBUSY;  in ncp5623_pattern_set()
93 	ncp->delay = 0;  in ncp5623_pattern_set()
97 		return -EINVAL;  in ncp5623_pattern_set()
99 	brightness_diff = pattern[0].brightness - ncp->current_brightness;  in ncp5623_pattern_set()
113 	ret = ncp5623_write(ncp->client, reg,  in ncp5623_pattern_set()
118 	ret = ncp5623_write(ncp->client,  in ncp5623_pattern_set()
134 	 * time_factor = max_brightness - 20 + 21  in ncp5623_pattern_set()
137 		ncp->delay = NCP5623_MAX_BRIGHTNESS + brightness_diff;  in ncp5623_pattern_set()
139 		ncp->delay = abs(brightness_diff);  in ncp5623_pattern_set()
141 	ncp->delay = msecs_to_jiffies(ncp->delay * pattern[0].delta_t) + jiffies;  in ncp5623_pattern_set()
143 	ncp->current_brightness = pattern[0].brightness;  in ncp5623_pattern_set()
155 	struct device *dev = &client->dev;  in ncp5623_probe()
159 	struct ncp5623 *ncp;  in ncp5623_probe()
167 		return -ENOMEM;  in ncp5623_probe()
169 	ncp->client = client;  in ncp5623_probe()
171 	mc_node = device_get_named_child_node(dev, "multi-led");  in ncp5623_probe()
173 		return -EINVAL;  in ncp5623_probe()
180 		ret = -ENOMEM;  in ncp5623_probe()
193 		subled_info[ncp->mc_dev.num_colors].channel = reg;  in ncp5623_probe()
194 		subled_info[ncp->mc_dev.num_colors++].color_index = color_index;  in ncp5623_probe()
199 	ncp->mc_dev.led_cdev.max_brightness = NCP5623_MAX_BRIGHTNESS;  in ncp5623_probe()
200 	ncp->mc_dev.subled_info = subled_info;  in ncp5623_probe()
201 	ncp->mc_dev.led_cdev.brightness_set_blocking = ncp5623_brightness_set;  in ncp5623_probe()
202 	ncp->mc_dev.led_cdev.pattern_set = ncp5623_pattern_set;  in ncp5623_probe()
203 	ncp->mc_dev.led_cdev.pattern_clear = ncp5623_pattern_clear;  in ncp5623_probe()
204 	ncp->mc_dev.led_cdev.default_trigger = "pattern";  in ncp5623_probe()
206 	mutex_init(&ncp->lock);  in ncp5623_probe()
209 	ret = led_classdev_multicolor_register_ext(dev, &ncp->mc_dev, &init_data);  in ncp5623_probe()
216 	mutex_destroy(&ncp->lock);  in ncp5623_probe()
230 	struct ncp5623 *ncp = i2c_get_clientdata(client);  in ncp5623_remove()
232 	mutex_lock(&ncp->lock);  in ncp5623_remove()
233 	ncp->delay = 0;  in ncp5623_remove()
234 	mutex_unlock(&ncp->lock);  in ncp5623_remove()
237 	led_classdev_multicolor_unregister(&ncp->mc_dev);  in ncp5623_remove()
238 	mutex_destroy(&ncp->lock);  in ncp5623_remove()
243 	struct ncp5623 *ncp = i2c_get_clientdata(client);  in ncp5623_shutdown()
245 	if (!(ncp->mc_dev.led_cdev.flags & LED_RETAIN_AT_SHUTDOWN))  in ncp5623_shutdown()
248 	mutex_destroy(&ncp->lock);  in ncp5623_shutdown()
252 	{ .compatible = "onnn,ncp5623" },
259 		.name = "ncp5623",
270 MODULE_DESCRIPTION("NCP5623 Multi-LED driver");