2  * Driver for BCM6358 memory-mapped LEDs, based on leds-syscon.c
8  * Free Software Foundation;  either version 2 of the  License, or (at your
25 #define BCM6358_SLED_CLKDIV_4		2
28 #define BCM6358_SLED_POLARITY		BIT(2)
35  * struct bcm6358_led - state container for bcm6358 based LEDs
36  * @cdev: LED class device for this LED
39  * @pin: LED pin number
40  * @active_low: LED is active low
82 	struct bcm6358_led *led =  in bcm6358_led_set()  local
86 	spin_lock_irqsave(led->lock, flags);  in bcm6358_led_set()
87 	bcm6358_led_busy(led->mem);  in bcm6358_led_set()
88 	val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);  in bcm6358_led_set()
89 	if ((led->active_low && value == LED_OFF) ||  in bcm6358_led_set()
90 	    (!led->active_low && value != LED_OFF))  in bcm6358_led_set()
91 		val |= BIT(led->pin);  in bcm6358_led_set()
93 		val &= ~(BIT(led->pin));  in bcm6358_led_set()
94 	bcm6358_led_write(led->mem + BCM6358_REG_MODE, val);  in bcm6358_led_set()
95 	spin_unlock_irqrestore(led->lock, flags);  in bcm6358_led_set()
101 	struct bcm6358_led *led;  in bcm6358_led()  local
105 	led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);  in bcm6358_led()
106 	if (!led)  in bcm6358_led()
107 		return -ENOMEM;  in bcm6358_led()
109 	led->pin = reg;  in bcm6358_led()
110 	led->mem = mem;  in bcm6358_led()
111 	led->lock = lock;  in bcm6358_led()
113 	if (of_property_read_bool(nc, "active-low"))  in bcm6358_led()
114 		led->active_low = true;  in bcm6358_led()
116 	led->cdev.name = of_get_property(nc, "label", NULL) ? : nc->name;  in bcm6358_led()
117 	led->cdev.default_trigger = of_get_property(nc,  in bcm6358_led()
118 						    "linux,default-trigger",  in bcm6358_led()
121 	if (!of_property_read_string(nc, "default-state", &state)) {  in bcm6358_led()
123 			led->cdev.brightness = LED_FULL;  in bcm6358_led()
126 			val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);  in bcm6358_led()
127 			val &= BIT(led->pin);  in bcm6358_led()
128 			if ((led->active_low && !val) ||  in bcm6358_led()
129 			    (!led->active_low && val))  in bcm6358_led()
130 				led->cdev.brightness = LED_FULL;  in bcm6358_led()
132 				led->cdev.brightness = LED_OFF;  in bcm6358_led()
134 			led->cdev.brightness = LED_OFF;  in bcm6358_led()
137 		led->cdev.brightness = LED_OFF;  in bcm6358_led()
140 	bcm6358_led_set(&led->cdev, led->cdev.brightness);  in bcm6358_led()
142 	led->cdev.brightness_set = bcm6358_led_set;  in bcm6358_led()
144 	rc = devm_led_classdev_register(dev, &led->cdev);  in bcm6358_led()
148 	dev_dbg(dev, "registered LED %s\n", led->cdev.name);  in bcm6358_led()
155 	struct device *dev = &pdev->dev;  in bcm6358_leds_probe()
156 	struct device_node *np = pdev->dev.of_node;  in bcm6358_leds_probe()
166 		return -EINVAL;  in bcm6358_leds_probe()
174 		return -ENOMEM;  in bcm6358_leds_probe()
180 	if (of_property_read_bool(np, "brcm,clk-dat-low"))  in bcm6358_leds_probe()
182 	of_property_read_u32(np, "brcm,clk-div", &clk_div);  in bcm6358_leds_probe()
190 	case 2:  in bcm6358_leds_probe()
207 			dev_err(dev, "invalid LED (%u >= %d)\n", reg,  in bcm6358_leds_probe()
223 	{ .compatible = "brcm,bcm6358-leds", },
231 		.name = "leds-bcm6358",
239 MODULE_DESCRIPTION("LED driver for BCM6358 controllers");
241 MODULE_ALIAS("platform:leds-bcm6358");