1 // SPDX-License-Identifier: GPL-2.0-or-later
20  * struct syscon_led - state container for syscon based LEDs
22  * @map: regmap to access the syscon device backing this LED
24  * @mask: the bit in the register corresponding to the LED
29 	struct regmap *map;  member
31 	u32 mask;  member
41 	int ret;  in syscon_led_set()
45 		sled->state = false;  in syscon_led_set()
47 		val = sled->mask;  in syscon_led_set()
48 		sled->state = true;  in syscon_led_set()
51 	ret = regmap_update_bits(sled->map, sled->offset, sled->mask, val);  in syscon_led_set()
53 		dev_err(sled->cdev.dev, "error updating LED status\n");  in syscon_led_set()
56 static int syscon_led_probe(struct platform_device *pdev)  in syscon_led_probe()
59 	struct device *dev = &pdev->dev;  in syscon_led_probe()
62 	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, "offset", &sled->offset))  in syscon_led_probe()
85 		return -EINVAL;  in syscon_led_probe()
86 	if (of_property_read_u32(np, "mask", &sled->mask))  in syscon_led_probe()
87 		return -EINVAL;  in syscon_led_probe()
89 	state = of_get_property(np, "default-state", NULL);  in syscon_led_probe()
94 			ret = regmap_read(map, sled->offset, &val);  in syscon_led_probe()
97 			sled->state = !!(val & sled->mask);  in syscon_led_probe()
99 			sled->state = true;  in syscon_led_probe()
100 			ret = regmap_update_bits(map, sled->offset,  in syscon_led_probe()
101 						 sled->mask,  in syscon_led_probe()
102 						 sled->mask);  in syscon_led_probe()
106 			sled->state = false;  in syscon_led_probe()
107 			ret = regmap_update_bits(map, sled->offset,  in syscon_led_probe()
108 						 sled->mask, 0);  in syscon_led_probe()
113 	sled->cdev.brightness_set = syscon_led_set;  in syscon_led_probe()
117 	ret = devm_led_classdev_register_ext(dev, &sled->cdev, &init_data);  in syscon_led_probe()
122 	dev_info(dev, "registered LED %s\n", sled->cdev.name);  in syscon_led_probe()
128 	{ .compatible = "register-bit-led", },
135 		.name	= "leds-syscon",