1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Driver for BCM6358 memory-mapped LEDs, based on leds-syscon.c
9 #include <linux/leds.h>
31  * struct bcm6358_led - state container for bcm6358 based LEDs
36  * @active_low: LED is active low
82 	spin_lock_irqsave(led->lock, flags);  in bcm6358_led_set()
83 	bcm6358_led_busy(led->mem);  in bcm6358_led_set()
84 	val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);  in bcm6358_led_set()
85 	if ((led->active_low && value == LED_OFF) ||  in bcm6358_led_set()
86 	    (!led->active_low && value != LED_OFF))  in bcm6358_led_set()
87 		val |= BIT(led->pin);  in bcm6358_led_set()
89 		val &= ~(BIT(led->pin));  in bcm6358_led_set()
90 	bcm6358_led_write(led->mem + BCM6358_REG_MODE, val);  in bcm6358_led_set()
91 	spin_unlock_irqrestore(led->lock, flags);  in bcm6358_led_set()
104 		return -ENOMEM;  in bcm6358_led()
106 	led->pin = reg;  in bcm6358_led()
107 	led->mem = mem;  in bcm6358_led()
108 	led->lock = lock;  in bcm6358_led()
110 	if (of_property_read_bool(nc, "active-low"))  in bcm6358_led()
111 		led->active_low = true;  in bcm6358_led()
113 	if (!of_property_read_string(nc, "default-state", &state)) {  in bcm6358_led()
115 			led->cdev.brightness = LED_FULL;  in bcm6358_led()
118 			val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);  in bcm6358_led()
119 			val &= BIT(led->pin);  in bcm6358_led()
120 			if ((led->active_low && !val) ||  in bcm6358_led()
121 			    (!led->active_low && val))  in bcm6358_led()
122 				led->cdev.brightness = LED_FULL;  in bcm6358_led()
124 				led->cdev.brightness = LED_OFF;  in bcm6358_led()
126 			led->cdev.brightness = LED_OFF;  in bcm6358_led()
129 		led->cdev.brightness = LED_OFF;  in bcm6358_led()
132 	bcm6358_led_set(&led->cdev, led->cdev.brightness);  in bcm6358_led()
134 	led->cdev.brightness_set = bcm6358_led_set;  in bcm6358_led()
137 	rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);  in bcm6358_led()
141 	dev_dbg(dev, "registered LED %s\n", led->cdev.name);  in bcm6358_led()
148 	struct device *dev = &pdev->dev;  in bcm6358_leds_probe()
149 	struct device_node *np = dev_of_node(&pdev->dev);  in bcm6358_leds_probe()
162 		return -ENOMEM;  in bcm6358_leds_probe()
168 	if (of_property_read_bool(np, "brcm,clk-dat-low"))  in bcm6358_leds_probe()
170 	of_property_read_u32(np, "brcm,clk-div", &clk_div);  in bcm6358_leds_probe()
211 	{ .compatible = "brcm,bcm6358-leds", },
219 		.name = "leds-bcm6358",
229 MODULE_ALIAS("platform:leds-bcm6358");