2  * Driver for BCM6328 memory-mapped LEDs, based on leds-syscon.c
58  * struct bcm6328_led - state container for bcm6328 based LEDs
59  * @cdev: LED class device for this LED
62  * @pin: LED pin number
65  * @active_low: LED is active low
97  * bits [31:0] -> LEDs 8-23
98  * bits [47:32] -> LEDs 0-7
99  * bits [63:48] -> unused
104 		return pin + 16; /* LEDs 0-7 (bits 47:32) */  in bcm6328_pin2shift()
106 		return pin - 8; /* LEDs 8-23 (bits 31:0) */  in bcm6328_pin2shift()
109 static void bcm6328_led_mode(struct bcm6328_led *led, unsigned long value)  in bcm6328_led_mode()  argument
114 	shift = bcm6328_pin2shift(led->pin);  in bcm6328_led_mode()
116 		mode = led->mem + BCM6328_REG_MODE_HI;  in bcm6328_led_mode()
118 		mode = led->mem + BCM6328_REG_MODE_LO;  in bcm6328_led_mode()
129 	struct bcm6328_led *led =  in bcm6328_led_set()  local
133 	spin_lock_irqsave(led->lock, flags);  in bcm6328_led_set()
134 	*(led->blink_leds) &= ~BIT(led->pin);  in bcm6328_led_set()
135 	if ((led->active_low && value == LED_OFF) ||  in bcm6328_led_set()
136 	    (!led->active_low && value != LED_OFF))  in bcm6328_led_set()
137 		bcm6328_led_mode(led, BCM6328_LED_MODE_ON);  in bcm6328_led_set()
139 		bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);  in bcm6328_led_set()
140 	spin_unlock_irqrestore(led->lock, flags);  in bcm6328_led_set()
158 	struct bcm6328_led *led =  in bcm6328_blink_set()  local
170 		dev_dbg(led_cdev->dev,  in bcm6328_blink_set()
172 		return -EINVAL;  in bcm6328_blink_set()
176 		dev_dbg(led_cdev->dev,  in bcm6328_blink_set()
179 		return -EINVAL;  in bcm6328_blink_set()
182 	spin_lock_irqsave(led->lock, flags);  in bcm6328_blink_set()
183 	if (*(led->blink_leds) == 0 ||  in bcm6328_blink_set()
184 	    *(led->blink_leds) == BIT(led->pin) ||  in bcm6328_blink_set()
185 	    *(led->blink_delay) == delay) {  in bcm6328_blink_set()
188 		*(led->blink_leds) |= BIT(led->pin);  in bcm6328_blink_set()
189 		*(led->blink_delay) = delay;  in bcm6328_blink_set()
191 		val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);  in bcm6328_blink_set()
194 		bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);  in bcm6328_blink_set()
196 		bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK);  in bcm6328_blink_set()
199 		dev_dbg(led_cdev->dev,  in bcm6328_blink_set()
201 		rc = -EINVAL;  in bcm6328_blink_set()
203 	spin_unlock_irqrestore(led->lock, flags);  in bcm6328_blink_set()
220 	/* Only LEDs 0-7 can be activity/link controlled */  in bcm6328_hwled()
224 	cnt = of_property_count_elems_of_size(nc, "brcm,link-signal-sources",  in bcm6328_hwled()
235 		of_property_read_u32_index(nc, "brcm,link-signal-sources", i,  in bcm6328_hwled()
251 					      "brcm,activity-signal-sources",  in bcm6328_hwled()
262 		of_property_read_u32_index(nc, "brcm,activity-signal-sources",  in bcm6328_hwled()
284 	struct bcm6328_led *led;  in bcm6328_led()  local
288 	led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);  in bcm6328_led()
289 	if (!led)  in bcm6328_led()
290 		return -ENOMEM;  in bcm6328_led()
292 	led->pin = reg;  in bcm6328_led()
293 	led->mem = mem;  in bcm6328_led()
294 	led->lock = lock;  in bcm6328_led()
295 	led->blink_leds = blink_leds;  in bcm6328_led()
296 	led->blink_delay = blink_delay;  in bcm6328_led()
298 	if (of_property_read_bool(nc, "active-low"))  in bcm6328_led()
299 		led->active_low = true;  in bcm6328_led()
301 	led->cdev.name = of_get_property(nc, "label", NULL) ? : nc->name;  in bcm6328_led()
302 	led->cdev.default_trigger = of_get_property(nc,  in bcm6328_led()
303 						    "linux,default-trigger",  in bcm6328_led()
306 	if (!of_property_read_string(nc, "default-state", &state)) {  in bcm6328_led()
308 			led->cdev.brightness = LED_FULL;  in bcm6328_led()
313 			shift = bcm6328_pin2shift(led->pin);  in bcm6328_led()
322 			if ((led->active_low && val == BCM6328_LED_MODE_OFF) ||  in bcm6328_led()
323 			    (!led->active_low && val == BCM6328_LED_MODE_ON))  in bcm6328_led()
324 				led->cdev.brightness = LED_FULL;  in bcm6328_led()
326 				led->cdev.brightness = LED_OFF;  in bcm6328_led()
328 			led->cdev.brightness = LED_OFF;  in bcm6328_led()
331 		led->cdev.brightness = LED_OFF;  in bcm6328_led()
334 	bcm6328_led_set(&led->cdev, led->cdev.brightness);  in bcm6328_led()
336 	led->cdev.brightness_set = bcm6328_led_set;  in bcm6328_led()
337 	led->cdev.blink_set = bcm6328_blink_set;  in bcm6328_led()
339 	rc = devm_led_classdev_register(dev, &led->cdev);  in bcm6328_led()
343 	dev_dbg(dev, "registered LED %s\n", led->cdev.name);  in bcm6328_led()
350 	struct device *dev = &pdev->dev;  in bcm6328_leds_probe()
351 	struct device_node *np = pdev->dev.of_node;  in bcm6328_leds_probe()
360 		return -EINVAL;  in bcm6328_leds_probe()
368 		return -ENOMEM;  in bcm6328_leds_probe()
372 		return -ENOMEM;  in bcm6328_leds_probe()
376 		return -ENOMEM;  in bcm6328_leds_probe()
386 	if (of_property_read_bool(np, "brcm,serial-leds"))  in bcm6328_leds_probe()
388 	if (of_property_read_bool(np, "brcm,serial-mux"))  in bcm6328_leds_probe()
390 	if (of_property_read_bool(np, "brcm,serial-clk-low"))  in bcm6328_leds_probe()
392 	if (!of_property_read_bool(np, "brcm,serial-dat-low"))  in bcm6328_leds_probe()
394 	if (!of_property_read_bool(np, "brcm,serial-shift-inv"))  in bcm6328_leds_probe()
406 			dev_err(dev, "invalid LED (%u >= %d)\n", reg,  in bcm6328_leds_probe()
411 		if (of_property_read_bool(child, "brcm,hardware-controlled"))  in bcm6328_leds_probe()
427 	{ .compatible = "brcm,bcm6328-leds", },
435 		.name = "leds-bcm6328",
444 MODULE_DESCRIPTION("LED driver for BCM6328 controllers");
446 MODULE_ALIAS("platform:leds-bcm6328");