1 // SPDX-License-Identifier: GPL-2.0
3  * CZ.NIC's Turris Omnia LEDs driver
9 #include <linux/led-class-multicolor.h>
13 #include "leds.h"
41 	struct omnia_led leds[];  member
57 	msgs[0].addr = client->addr;  in omnia_cmd_read_u8()
61 	msgs[1].addr = client->addr;  in omnia_cmd_read_u8()
66 	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));  in omnia_cmd_read_u8()
72 		return -EIO;  in omnia_cmd_read_u8()
79 	struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent);  in omnia_led_brightness_set_blocking()  local
84 	mutex_lock(&leds->lock);  in omnia_led_brightness_set_blocking()
86 	led_mc_calc_color_components(&led->mc_cdev, brightness);  in omnia_led_brightness_set_blocking()
89 	buf[1] = led->reg;  in omnia_led_brightness_set_blocking()
90 	buf[2] = mc_cdev->subled_info[0].brightness;  in omnia_led_brightness_set_blocking()
91 	buf[3] = mc_cdev->subled_info[1].brightness;  in omnia_led_brightness_set_blocking()
92 	buf[4] = mc_cdev->subled_info[2].brightness;  in omnia_led_brightness_set_blocking()
94 	state = CMD_LED_STATE_LED(led->reg);  in omnia_led_brightness_set_blocking()
98 	ret = omnia_cmd_write_u8(leds->client, CMD_LED_STATE, state);  in omnia_led_brightness_set_blocking()
100 		ret = i2c_master_send(leds->client, buf, 5);  in omnia_led_brightness_set_blocking()
102 	mutex_unlock(&leds->lock);  in omnia_led_brightness_set_blocking()
111 	struct device *dev = &client->dev;  in omnia_led_register()
115 	ret = of_property_read_u32(np, "reg", &led->reg);  in omnia_led_register()
116 	if (ret || led->reg >= OMNIA_BOARD_LEDS) {  in omnia_led_register()
119 			 np, OMNIA_BOARD_LEDS - 1);  in omnia_led_register()
131 	led->subled_info[0].color_index = LED_COLOR_ID_RED;  in omnia_led_register()
132 	led->subled_info[0].channel = 0;  in omnia_led_register()
133 	led->subled_info[1].color_index = LED_COLOR_ID_GREEN;  in omnia_led_register()
134 	led->subled_info[1].channel = 1;  in omnia_led_register()
135 	led->subled_info[2].color_index = LED_COLOR_ID_BLUE;  in omnia_led_register()
136 	led->subled_info[2].channel = 2;  in omnia_led_register()
138 	led->mc_cdev.subled_info = led->subled_info;  in omnia_led_register()
139 	led->mc_cdev.num_colors = OMNIA_LED_NUM_CHANNELS;  in omnia_led_register()
141 	init_data.fwnode = &np->fwnode;  in omnia_led_register()
143 	cdev = &led->mc_cdev.led_cdev;  in omnia_led_register()
144 	cdev->max_brightness = 255;  in omnia_led_register()
145 	cdev->brightness_set_blocking = omnia_led_brightness_set_blocking;  in omnia_led_register()
149 				 CMD_LED_MODE_LED(led->reg) |  in omnia_led_register()
157 	/* disable the LED */  in omnia_led_register()
159 				 CMD_LED_STATE_LED(led->reg));  in omnia_led_register()
165 	ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev,  in omnia_led_register()
177  * can be used to control the intensity of all the LEDs at once, so that if they
208 		return -EINVAL;  in brightness_store()
211 		return -EINVAL;  in brightness_store()
227 	struct device *dev = &client->dev;  in omnia_leds_probe()
229 	struct omnia_leds *leds;  in omnia_leds_probe()  local
235 		dev_err(dev, "LEDs are not defined in device tree!\n");  in omnia_leds_probe()
236 		return -ENODEV;  in omnia_leds_probe()
238 		dev_err(dev, "Too many LEDs defined in device tree!\n");  in omnia_leds_probe()
239 		return -EINVAL;  in omnia_leds_probe()
242 	leds = devm_kzalloc(dev, struct_size(leds, leds, count), GFP_KERNEL);  in omnia_leds_probe()
243 	if (!leds)  in omnia_leds_probe()
244 		return -ENOMEM;  in omnia_leds_probe()
246 	leds->client = client;  in omnia_leds_probe()
247 	i2c_set_clientdata(client, leds);  in omnia_leds_probe()
249 	mutex_init(&leds->lock);  in omnia_leds_probe()
251 	led = &leds->leds[0];  in omnia_leds_probe()
269 	/* put all LEDs into default (HW triggered) mode */  in omnia_leds_remove()
273 	/* set all LEDs color to [255, 255, 255] */  in omnia_leds_remove()
284 	{ .compatible = "cznic,turris-omnia-leds", },
299 		.name	= "leds-turris-omnia",
308 MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs");