1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
9 #include <linux/leds-ti-lmu-common.h>
15 #include <linux/mfd/ti-lmu.h>
16 #include <linux/mfd/ti-lmu-register.h>
30  * @led_sources: The LED strings supported in this array
31  * @num_leds: Number of LED strings are supported in this array
49 	return ti_lmu_common_set_brightness(&chip->lmu_data, brt_val);  in lm36274_brightness_set()
57 	for (i = 0; i < chip->num_leds; i++)  in lm36274_init()
58 		enable_val |= (1 << chip->led_sources[i]);  in lm36274_init()
61 		dev_err(chip->dev, "No LEDs were enabled\n");  in lm36274_init()
62 		return -EINVAL;  in lm36274_init()
67 	return regmap_write(chip->regmap, LM36274_REG_BL_EN, enable_val);  in lm36274_init()
73 	struct device *dev = chip->dev;  in lm36274_parse_dt()
79 		return -EINVAL;  in lm36274_parse_dt()
83 	init_data->fwnode = child;  in lm36274_parse_dt()
84 	init_data->devicename = chip->pdev->name;  in lm36274_parse_dt()
86 	init_data->default_label = ":";  in lm36274_parse_dt()
88 	chip->num_leds = fwnode_property_count_u32(child, "led-sources");  in lm36274_parse_dt()
89 	if (chip->num_leds <= 0) {  in lm36274_parse_dt()
90 		ret = -ENODEV;  in lm36274_parse_dt()
94 	ret = fwnode_property_read_u32_array(child, "led-sources",  in lm36274_parse_dt()
95 					     chip->led_sources, chip->num_leds);  in lm36274_parse_dt()
97 		dev_err(dev, "led-sources property missing\n");  in lm36274_parse_dt()
109 	struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);  in lm36274_probe()
114 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in lm36274_probe()
116 		return -ENOMEM;  in lm36274_probe()
118 	chip->pdev = pdev;  in lm36274_probe()
119 	chip->dev = &pdev->dev;  in lm36274_probe()
120 	chip->regmap = lmu->regmap;  in lm36274_probe()
125 		dev_err(chip->dev, "Failed to parse DT node\n");  in lm36274_probe()
132 		dev_err(chip->dev, "Failed to init the device\n");  in lm36274_probe()
136 	chip->lmu_data.regmap = chip->regmap;  in lm36274_probe()
137 	chip->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT;  in lm36274_probe()
138 	chip->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB;  in lm36274_probe()
139 	chip->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB;  in lm36274_probe()
141 	chip->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT;  in lm36274_probe()
142 	chip->led_dev.brightness_set_blocking = lm36274_brightness_set;  in lm36274_probe()
144 	ret = devm_led_classdev_register_ext(chip->dev, &chip->led_dev,  in lm36274_probe()
147 		dev_err(chip->dev, "Failed to register LED for node %pfw\n",  in lm36274_probe()
156 	{ .compatible = "ti,lm36274-backlight", },
164 		.name = "lm36274-leds",