2  * leds-lm3533.c -- LM3533 LED driver
4  * Copyright (C) 2011-2012 Texas Instruments
65 	return led->id + 2;  in lm3533_led_get_ctrlbank_id()
70 	return base + led->id;  in lm3533_led_get_lv_reg()
75 	return led->id;  in lm3533_led_get_pattern()
92 	dev_dbg(led->cdev.dev, "%s - %d\n", __func__, enable);  in lm3533_led_pattern_enable()
94 	mutex_lock(&led->mutex);  in lm3533_led_pattern_enable()
96 	state = test_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);  in lm3533_led_pattern_enable()
108 	ret = lm3533_update(led->lm3533, LM3533_REG_PATTERN_ENABLE, val, mask);  in lm3533_led_pattern_enable()
110 		dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",  in lm3533_led_pattern_enable()
115 	__change_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);  in lm3533_led_pattern_enable()
117 	mutex_unlock(&led->mutex);  in lm3533_led_pattern_enable()
127 	dev_dbg(led->cdev.dev, "%s - %d\n", __func__, value);  in lm3533_led_set()
132 	return lm3533_ctrlbank_set_brightness(&led->cb, value);  in lm3533_led_set()
141 	ret = lm3533_ctrlbank_get_brightness(&led->cb, &val);  in lm3533_led_get()
145 	dev_dbg(led->cdev.dev, "%s - %u\n", __func__, val);  in lm3533_led_get()
155 #define LM3533_LED_DELAY1_VMAX	(LM3533_LED_DELAY2_VMIN - 1)
156 #define LM3533_LED_DELAY2_VMAX	(LM3533_LED_DELAY3_VMIN - 1)
167 /* t_step = (t_max - t_min) / (v_max - v_min) */
172 /* Delay limits for hardware accelerated blinking (in ms). */
182  *	t_step = (t_max - t_min) / (v_max - v_min)
191 	val = (*t + t_step / 2 - t_min) / t_step + v_min;  in time_to_val()
193 	*t = t_step * (val - v_min) + t_min;  in time_to_val()
199  * Returns time code corresponding to *delay (in ms) and updates *delay to
200  * reflect actual hardware delay.
202  * Hardware supports 256 discrete delay times, divided into three groups with
203  * the following ranges and step-sizes:
205  *	[   16,   999]	[0x00, 0x3e]	step  16 ms
206  *	[ 1130,  9781]	[0x3d, 0x7f]	step 131 ms
207  *	[10306, 76890]	[0x80, 0xff]	step 524 ms
209  * Note that delay group 3 is only available for delay_off.
211 static u8 lm3533_led_get_hw_delay(unsigned *delay)  in lm3533_led_get_hw_delay()  argument
216 	t = *delay * 1000;  in lm3533_led_get_hw_delay()
238 	*delay = (t + 500) / 1000;  in lm3533_led_get_hw_delay()
244  * Set delay register base to *delay (in ms) and update *delay to reflect
245  * actual hardware delay used.
248 							unsigned long *delay)  in lm3533_led_delay_set()  argument
255 	t = (unsigned)*delay;  in lm3533_led_delay_set()
257 	/* Delay group 3 is only available for low time (delay off). */  in lm3533_led_delay_set()
263 	dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,  in lm3533_led_delay_set()
264 							*delay, t, val);  in lm3533_led_delay_set()
266 	ret = lm3533_write(led->lm3533, reg, val);  in lm3533_led_delay_set()
268 		dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);  in lm3533_led_delay_set()
270 	*delay = t;  in lm3533_led_delay_set()
292 	dev_dbg(led->cdev.dev, "%s - on = %lu, off = %lu\n", __func__,  in lm3533_led_blink_set()
297 		return -EINVAL;  in lm3533_led_blink_set()
321 	return scnprintf(buf, PAGE_SIZE, "%d\n", led->id);  in show_id()
327  *   0 - 2048 us (default)
328  *   1 - 262 ms
329  *   2 - 524 ms
330  *   3 - 1.049 s
331  *   4 - 2.097 s
332  *   5 - 4.194 s
333  *   6 - 8.389 s
334  *   7 - 16.78 s
347 	ret = lm3533_read(led->lm3533, reg, &val);  in show_risefalltime()
379 		return -EINVAL;  in store_risefalltime()
382 	ret = lm3533_write(led->lm3533, reg, val);  in store_risefalltime()
416 	ret = lm3533_read(led->lm3533, reg, &val);  in show_als_channel()
438 		return -EINVAL;  in store_als_channel()
442 		return -EINVAL;  in store_als_channel()
446 	val = channel - 1;  in store_als_channel()
448 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_als_channel()
466 	ret = lm3533_read(led->lm3533, reg, &val);  in show_als_en()
488 		return -EINVAL;  in store_als_en()
498 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_als_en()
516 	ret = lm3533_read(led->lm3533, reg, &val);  in show_linear()
541 		return -EINVAL;  in store_linear()
551 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_linear()
567 	ret = lm3533_ctrlbank_get_pwm(&led->cb, &val);  in show_pwm()
584 		return -EINVAL;  in store_pwm()
586 	ret = lm3533_ctrlbank_set_pwm(&led->cb, val);  in store_pwm()
598 static LM3533_ATTR_RW(pwm);
618 	umode_t mode = attr->mode;  in lm3533_led_attr_is_visible()
622 		if (!led->lm3533->have_als)  in lm3533_led_attr_is_visible()
644 	ret = lm3533_ctrlbank_set_max_current(&led->cb, pdata->max_current);  in lm3533_led_setup()
648 	return lm3533_ctrlbank_set_pwm(&led->cb, pdata->pwm);  in lm3533_led_setup()
658 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_probe()
660 	lm3533 = dev_get_drvdata(pdev->dev.parent);  in lm3533_led_probe()
662 		return -EINVAL;  in lm3533_led_probe()
664 	pdata = dev_get_platdata(&pdev->dev);  in lm3533_led_probe()
666 		dev_err(&pdev->dev, "no platform data\n");  in lm3533_led_probe()
667 		return -EINVAL;  in lm3533_led_probe()
670 	if (pdev->id < 0 || pdev->id >= LM3533_LVCTRLBANK_COUNT) {  in lm3533_led_probe()
671 		dev_err(&pdev->dev, "illegal LED id %d\n", pdev->id);  in lm3533_led_probe()
672 		return -EINVAL;  in lm3533_led_probe()
675 	led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);  in lm3533_led_probe()
677 		return -ENOMEM;  in lm3533_led_probe()
679 	led->lm3533 = lm3533;  in lm3533_led_probe()
680 	led->cdev.name = pdata->name;  in lm3533_led_probe()
681 	led->cdev.default_trigger = pdata->default_trigger;  in lm3533_led_probe()
682 	led->cdev.brightness_set_blocking = lm3533_led_set;  in lm3533_led_probe()
683 	led->cdev.brightness_get = lm3533_led_get;  in lm3533_led_probe()
684 	led->cdev.blink_set = lm3533_led_blink_set;  in lm3533_led_probe()
685 	led->cdev.brightness = LED_OFF;  in lm3533_led_probe()
686 	led->cdev.groups = lm3533_led_attribute_groups,  in lm3533_led_probe()
687 	led->id = pdev->id;  in lm3533_led_probe()
689 	mutex_init(&led->mutex);  in lm3533_led_probe()
695 	led->cb.lm3533 = lm3533;  in lm3533_led_probe()
696 	led->cb.id = lm3533_led_get_ctrlbank_id(led);  in lm3533_led_probe()
697 	led->cb.dev = lm3533->dev;  in lm3533_led_probe()
701 	ret = led_classdev_register(pdev->dev.parent, &led->cdev);  in lm3533_led_probe()
703 		dev_err(&pdev->dev, "failed to register LED %d\n", pdev->id);  in lm3533_led_probe()
707 	led->cb.dev = led->cdev.dev;  in lm3533_led_probe()
713 	ret = lm3533_ctrlbank_enable(&led->cb);  in lm3533_led_probe()
720 	led_classdev_unregister(&led->cdev);  in lm3533_led_probe()
729 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_remove()
731 	lm3533_ctrlbank_disable(&led->cb);  in lm3533_led_remove()
732 	led_classdev_unregister(&led->cdev);  in lm3533_led_remove()
742 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_shutdown()
744 	lm3533_ctrlbank_disable(&led->cb);  in lm3533_led_shutdown()
745 	lm3533_led_set(&led->cdev, LED_OFF);		/* disable blink */  in lm3533_led_shutdown()
750 		.name = "lm3533-leds",
761 MODULE_ALIAS("platform:lm3533-leds");