17 #include <linux/leds.h>
85  * struct mt6323_led - state container for the LED device
99  * struct mt6323_leds -	state container for holding LED controller
120 	struct mt6323_leds *leds = led->parent;  in mt6323_led_hw_brightness()  local
121 	struct regmap *regmap = leds->hw->regmap;  in mt6323_led_hw_brightness()
132 	con2_val |=  MT6323_ISINK_CH_STEP(brightness - 1) |  in mt6323_led_hw_brightness()
136 	ret = regmap_update_bits(regmap, MT6323_ISINK_CON2(led->id),  in mt6323_led_hw_brightness()
144 	struct mt6323_leds *leds = led->parent;  in mt6323_led_hw_off()  local
145 	struct regmap *regmap = leds->hw->regmap;  in mt6323_led_hw_off()
149 	status = MT6323_ISINK_CH_EN(led->id);  in mt6323_led_hw_off()
151 				 MT6323_ISINK_CH_EN_MASK(led->id), ~status);  in mt6323_led_hw_off()
157 				 MT6323_RG_ISINK_CK_PDN_MASK(led->id),  in mt6323_led_hw_off()
158 				 MT6323_RG_ISINK_CK_PDN(led->id));  in mt6323_led_hw_off()
169 	struct mt6323_leds *leds = led->parent;  in mt6323_get_led_hw_brightness()  local
170 	struct regmap *regmap = leds->hw->regmap;  in mt6323_get_led_hw_brightness()
178 	if (status & MT6323_RG_ISINK_CK_PDN_MASK(led->id))  in mt6323_get_led_hw_brightness()
185 	if (!(status & MT6323_ISINK_CH_EN(led->id)))  in mt6323_get_led_hw_brightness()
188 	ret = regmap_read(regmap, MT6323_ISINK_CON2(led->id), &status);  in mt6323_get_led_hw_brightness()
200 	struct mt6323_leds *leds = led->parent;  in mt6323_led_hw_on()  local
201 	struct regmap *regmap = leds->hw->regmap;  in mt6323_led_hw_on()
211 				 MT6323_RG_ISINK_CK_SEL_MASK(led->id), 0);  in mt6323_led_hw_on()
215 	status = MT6323_RG_ISINK_CK_PDN(led->id);  in mt6323_led_hw_on()
217 				 MT6323_RG_ISINK_CK_PDN_MASK(led->id),  in mt6323_led_hw_on()
225 				 MT6323_ISINK_CH_EN_MASK(led->id),  in mt6323_led_hw_on()
226 				 MT6323_ISINK_CH_EN(led->id));  in mt6323_led_hw_on()
234 	ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),  in mt6323_led_hw_on()
240 	ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),  in mt6323_led_hw_on()
254 	struct mt6323_leds *leds = led->parent;  in mt6323_led_set_blink()  local
255 	struct regmap *regmap = leds->hw->regmap;  in mt6323_led_set_blink()
267 		return -EINVAL;  in mt6323_led_set_blink()
271 	 * friendly blink pattern for the LED so using  in mt6323_led_set_blink()
288 		return -EINVAL;  in mt6323_led_set_blink()
290 	mutex_lock(&leds->lock);  in mt6323_led_set_blink()
295 	if (!led->current_brightness) {  in mt6323_led_set_blink()
296 		ret = mt6323_led_hw_on(cdev, cdev->max_brightness);  in mt6323_led_set_blink()
299 		led->current_brightness = cdev->max_brightness;  in mt6323_led_set_blink()
302 	ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),  in mt6323_led_set_blink()
304 				 MT6323_ISINK_DIM_DUTY(duty_hw - 1));  in mt6323_led_set_blink()
308 	ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),  in mt6323_led_set_blink()
310 				 MT6323_ISINK_DIM_FSEL(period - 1));  in mt6323_led_set_blink()
312 	mutex_unlock(&leds->lock);  in mt6323_led_set_blink()
321 	struct mt6323_leds *leds = led->parent;  in mt6323_led_set_brightness()  local
324 	mutex_lock(&leds->lock);  in mt6323_led_set_brightness()
326 	if (!led->current_brightness && brightness) {  in mt6323_led_set_brightness()
340 	led->current_brightness = brightness;  in mt6323_led_set_brightness()
342 	mutex_unlock(&leds->lock);  in mt6323_led_set_brightness()
354 	led->cdev.name = of_get_property(np, "label", NULL) ? : np->name;  in mt6323_led_set_dt_default()
355 	led->cdev.default_trigger = of_get_property(np,  in mt6323_led_set_dt_default()
356 						    "linux,default-trigger",  in mt6323_led_set_dt_default()
359 	state = of_get_property(np, "default-state", NULL);  in mt6323_led_set_dt_default()
365 			led->current_brightness = ret;  in mt6323_led_set_dt_default()
369 			mt6323_led_set_brightness(cdev, cdev->max_brightness);  in mt6323_led_set_dt_default()
380 	struct device *dev = &pdev->dev;  in mt6323_led_probe()
381 	struct device_node *np = pdev->dev.of_node;  in mt6323_led_probe()
383 	struct mt6397_chip *hw = dev_get_drvdata(pdev->dev.parent);  in mt6323_led_probe()
384 	struct mt6323_leds *leds;  in mt6323_led_probe()  local
390 	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);  in mt6323_led_probe()
391 	if (!leds)  in mt6323_led_probe()
392 		return -ENOMEM;  in mt6323_led_probe()
394 	platform_set_drvdata(pdev, leds);  in mt6323_led_probe()
395 	leds->dev = dev;  in mt6323_led_probe()
398 	 * leds->hw points to the underlying bus for the register  in mt6323_led_probe()
401 	leds->hw = hw;  in mt6323_led_probe()
402 	mutex_init(&leds->lock);  in mt6323_led_probe()
405 	ret = regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,  in mt6323_led_probe()
408 		dev_err(leds->dev,  in mt6323_led_probe()
420 		if (reg >= MT6323_MAX_LEDS || leds->led[reg]) {  in mt6323_led_probe()
422 			ret = -EINVAL;  in mt6323_led_probe()
428 			ret = -ENOMEM;  in mt6323_led_probe()
432 		leds->led[reg] = led;  in mt6323_led_probe()
433 		leds->led[reg]->id = reg;  in mt6323_led_probe()
434 		leds->led[reg]->cdev.max_brightness = MT6323_MAX_BRIGHTNESS;  in mt6323_led_probe()
435 		leds->led[reg]->cdev.brightness_set_blocking =  in mt6323_led_probe()
437 		leds->led[reg]->cdev.blink_set = mt6323_led_set_blink;  in mt6323_led_probe()
438 		leds->led[reg]->cdev.brightness_get =  in mt6323_led_probe()
440 		leds->led[reg]->parent = leds;  in mt6323_led_probe()
442 		ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child);  in mt6323_led_probe()
444 			dev_err(leds->dev,  in mt6323_led_probe()
449 		ret = devm_led_classdev_register(dev, &leds->led[reg]->cdev);  in mt6323_led_probe()
451 			dev_err(&pdev->dev, "Failed to register LED: %d\n",  in mt6323_led_probe()
455 		leds->led[reg]->cdev.dev->of_node = child;  in mt6323_led_probe()
467 	struct mt6323_leds *leds = platform_get_drvdata(pdev);  in mt6323_led_remove()  local
470 	/* Turn the LEDs off on driver removal. */  in mt6323_led_remove()
471 	for (i = 0 ; leds->led[i] ; i++)  in mt6323_led_remove()
472 		mt6323_led_hw_off(&leds->led[i]->cdev);  in mt6323_led_remove()
474 	regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,  in mt6323_led_remove()
478 	mutex_destroy(&leds->lock);  in mt6323_led_remove()
484 	{ .compatible = "mediatek,mt6323-led" },
493 		.name	= "mt6323-led",