1 // SPDX-License-Identifier: GPL-2.0-or-later
19  * struct syscon_led - state container for syscon based LEDs
21  * @map: regmap to access the syscon device backing this LED
23  * @mask: the bit in the register corresponding to the LED
28 	struct regmap *map;  member
30 	u32 mask;  member
40 	int ret;  in syscon_led_set()
44 		sled->state = false;  in syscon_led_set()
46 		val = sled->mask;  in syscon_led_set()
47 		sled->state = true;  in syscon_led_set()
50 	ret = regmap_update_bits(sled->map, sled->offset, sled->mask, val);  in syscon_led_set()
52 		dev_err(sled->cdev.dev, "error updating LED status\n");  in syscon_led_set()
55 static int syscon_led_probe(struct platform_device *pdev)  in syscon_led_probe()
58 	struct device *dev = &pdev->dev;  in syscon_led_probe()
61 	struct regmap *map;  in syscon_led_probe()  local
65 	int ret;  in syscon_led_probe()
67 	parent = dev->parent;  in syscon_led_probe()
70 		return -ENODEV;  in syscon_led_probe()
72 	map = syscon_node_to_regmap(dev_of_node(parent));  in syscon_led_probe()
73 	if (IS_ERR(map)) {  in syscon_led_probe()
75 		return PTR_ERR(map);  in syscon_led_probe()
80 		return -ENOMEM;  in syscon_led_probe()
82 	sled->map = map;  in syscon_led_probe()
84 	if (of_property_read_u32(np, "reg", &sled->offset) &&  in syscon_led_probe()
85 	    of_property_read_u32(np, "offset", &sled->offset))  in syscon_led_probe()
86 		return -EINVAL;  in syscon_led_probe()
87 	if (of_property_read_u32(np, "mask", &sled->mask))  in syscon_led_probe()
88 		return -EINVAL;  in syscon_led_probe()
95 		ret = regmap_update_bits(map, sled->offset, sled->mask, sled->mask);  in syscon_led_probe()
98 		sled->state = true;  in syscon_led_probe()
101 		ret = regmap_read(map, sled->offset, &value);  in syscon_led_probe()
104 		sled->state = !!(value & sled->mask);  in syscon_led_probe()
107 		ret = regmap_update_bits(map, sled->offset, sled->mask, 0);  in syscon_led_probe()
110 		sled->state = false;  in syscon_led_probe()
112 	sled->cdev.brightness_set = syscon_led_set;  in syscon_led_probe()
114 	ret = devm_led_classdev_register_ext(dev, &sled->cdev, &init_data);  in syscon_led_probe()
119 	dev_info(dev, "registered LED %s\n", sled->cdev.name);  in syscon_led_probe()
125 	{ .compatible = "register-bit-led", },
132 		.name	= "leds-syscon",