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"
49 	struct omnia_led leds[];  member
56 	struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent);  in omnia_led_brightness_set_blocking()  local
61 	mutex_lock(&leds->lock);  in omnia_led_brightness_set_blocking()
63 	led_mc_calc_color_components(&led->mc_cdev, brightness);  in omnia_led_brightness_set_blocking()
66 	buf[OMNIA_CMD_LED_COLOR_LED] = led->reg;  in omnia_led_brightness_set_blocking()
67 	buf[OMNIA_CMD_LED_COLOR_R] = mc_cdev->subled_info[0].brightness;  in omnia_led_brightness_set_blocking()
68 	buf[OMNIA_CMD_LED_COLOR_G] = mc_cdev->subled_info[1].brightness;  in omnia_led_brightness_set_blocking()
69 	buf[OMNIA_CMD_LED_COLOR_B] = mc_cdev->subled_info[2].brightness;  in omnia_led_brightness_set_blocking()
71 	state = CMD_LED_STATE_LED(led->reg);  in omnia_led_brightness_set_blocking()
75 	ret = i2c_smbus_write_byte_data(leds->client, CMD_LED_STATE, state);  in omnia_led_brightness_set_blocking()
77 		ret = i2c_master_send(leds->client, buf, 5);  in omnia_led_brightness_set_blocking()
79 	mutex_unlock(&leds->lock);  in omnia_led_brightness_set_blocking()
88 	struct device *dev = &client->dev;  in omnia_led_register()
92 	ret = of_property_read_u32(np, "reg", &led->reg);  in omnia_led_register()
93 	if (ret || led->reg >= OMNIA_BOARD_LEDS) {  in omnia_led_register()
96 			 np, OMNIA_BOARD_LEDS - 1);  in omnia_led_register()
108 	led->subled_info[0].color_index = LED_COLOR_ID_RED;  in omnia_led_register()
109 	led->subled_info[0].channel = 0;  in omnia_led_register()
110 	led->subled_info[1].color_index = LED_COLOR_ID_GREEN;  in omnia_led_register()
111 	led->subled_info[1].channel = 1;  in omnia_led_register()
112 	led->subled_info[2].color_index = LED_COLOR_ID_BLUE;  in omnia_led_register()
113 	led->subled_info[2].channel = 2;  in omnia_led_register()
115 	led->mc_cdev.subled_info = led->subled_info;  in omnia_led_register()
116 	led->mc_cdev.num_colors = OMNIA_LED_NUM_CHANNELS;  in omnia_led_register()
118 	init_data.fwnode = &np->fwnode;  in omnia_led_register()
120 	cdev = &led->mc_cdev.led_cdev;  in omnia_led_register()
121 	cdev->max_brightness = 255;  in omnia_led_register()
122 	cdev->brightness_set_blocking = omnia_led_brightness_set_blocking;  in omnia_led_register()
126 					CMD_LED_MODE_LED(led->reg) |  in omnia_led_register()
133 	/* disable the LED */  in omnia_led_register()
134 	ret = i2c_smbus_write_byte_data(client, CMD_LED_STATE, CMD_LED_STATE_LED(led->reg));  in omnia_led_register()
140 	ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev, &init_data);  in omnia_led_register()
151  * can be used to control the intensity of all the LEDs at once, so that if they
163 	struct omnia_leds *leds = i2c_get_clientdata(client);  in brightness_show()  local
166 	mutex_lock(&leds->lock);  in brightness_show()
168 	mutex_unlock(&leds->lock);  in brightness_show()
180 	struct omnia_leds *leds = i2c_get_clientdata(client);  in brightness_store()  local
185 		return -EINVAL;  in brightness_store()
188 		return -EINVAL;  in brightness_store()
190 	mutex_lock(&leds->lock);  in brightness_store()
192 	mutex_unlock(&leds->lock);  in brightness_store()
210 	struct device *dev = &client->dev;  in omnia_leds_probe()
212 	struct omnia_leds *leds;  in omnia_leds_probe()  local
218 		dev_err(dev, "LEDs are not defined in device tree!\n");  in omnia_leds_probe()
219 		return -ENODEV;  in omnia_leds_probe()
221 		dev_err(dev, "Too many LEDs defined in device tree!\n");  in omnia_leds_probe()
222 		return -EINVAL;  in omnia_leds_probe()
225 	leds = devm_kzalloc(dev, struct_size(leds, leds, count), GFP_KERNEL);  in omnia_leds_probe()
226 	if (!leds)  in omnia_leds_probe()
227 		return -ENOMEM;  in omnia_leds_probe()
229 	leds->client = client;  in omnia_leds_probe()
230 	i2c_set_clientdata(client, leds);  in omnia_leds_probe()
232 	mutex_init(&leds->lock);  in omnia_leds_probe()
234 	led = &leds->leds[0];  in omnia_leds_probe()
255 	/* put all LEDs into default (HW triggered) mode */  in omnia_leds_remove()
259 	/* set all LEDs color to [255, 255, 255] */  in omnia_leds_remove()
272 	{ .compatible = "cznic,turris-omnia-leds", },
287 		.name	= "leds-turris-omnia",
295 MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs");