1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * leds-lm3533.c -- LM3533 LED driver
5  * Copyright (C) 2011-2012 Texas Instruments
61 	return led->id + 2;  in lm3533_led_get_ctrlbank_id()
66 	return base + led->id;  in lm3533_led_get_lv_reg()
71 	return led->id;  in lm3533_led_get_pattern()
88 	dev_dbg(led->cdev.dev, "%s - %d\n", __func__, enable);  in lm3533_led_pattern_enable()
90 	mutex_lock(&led->mutex);  in lm3533_led_pattern_enable()
92 	state = test_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);  in lm3533_led_pattern_enable()
104 	ret = lm3533_update(led->lm3533, LM3533_REG_PATTERN_ENABLE, val, mask);  in lm3533_led_pattern_enable()
106 		dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",  in lm3533_led_pattern_enable()
111 	__change_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);  in lm3533_led_pattern_enable()
113 	mutex_unlock(&led->mutex);  in lm3533_led_pattern_enable()
123 	dev_dbg(led->cdev.dev, "%s - %d\n", __func__, value);  in lm3533_led_set()
128 	return lm3533_ctrlbank_set_brightness(&led->cb, value);  in lm3533_led_set()
137 	ret = lm3533_ctrlbank_get_brightness(&led->cb, &val);  in lm3533_led_get()
141 	dev_dbg(led->cdev.dev, "%s - %u\n", __func__, val);  in lm3533_led_get()
151 #define LM3533_LED_DELAY1_VMAX	(LM3533_LED_DELAY2_VMIN - 1)
152 #define LM3533_LED_DELAY2_VMAX	(LM3533_LED_DELAY3_VMIN - 1)
163 /* t_step = (t_max - t_min) / (v_max - v_min) */
168 /* Delay limits for hardware accelerated blinking (in ms). */
178  *	t_step = (t_max - t_min) / (v_max - v_min)
187 	val = (*t + t_step / 2 - t_min) / t_step + v_min;  in time_to_val()
189 	*t = t_step * (val - v_min) + t_min;  in time_to_val()
195  * Returns time code corresponding to *delay (in ms) and updates *delay to
196  * reflect actual hardware delay.
198  * Hardware supports 256 discrete delay times, divided into three groups with
199  * the following ranges and step-sizes:
201  *	[   16,   999]	[0x00, 0x3e]	step  16 ms
202  *	[ 1130,  9781]	[0x3d, 0x7f]	step 131 ms
203  *	[10306, 76890]	[0x80, 0xff]	step 524 ms
205  * Note that delay group 3 is only available for delay_off.
207 static u8 lm3533_led_get_hw_delay(unsigned *delay)  in lm3533_led_get_hw_delay()  argument
212 	t = *delay * 1000;  in lm3533_led_get_hw_delay()
234 	*delay = (t + 500) / 1000;  in lm3533_led_get_hw_delay()
240  * Set delay register base to *delay (in ms) and update *delay to reflect
241  * actual hardware delay used.
244 							unsigned long *delay)  in lm3533_led_delay_set()  argument
251 	t = (unsigned)*delay;  in lm3533_led_delay_set()
253 	/* Delay group 3 is only available for low time (delay off). */  in lm3533_led_delay_set()
259 	dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,  in lm3533_led_delay_set()
260 							*delay, t, val);  in lm3533_led_delay_set()
262 	ret = lm3533_write(led->lm3533, reg, val);  in lm3533_led_delay_set()
264 		dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);  in lm3533_led_delay_set()
266 	*delay = t;  in lm3533_led_delay_set()
288 	dev_dbg(led->cdev.dev, "%s - on = %lu, off = %lu\n", __func__,  in lm3533_led_blink_set()
293 		return -EINVAL;  in lm3533_led_blink_set()
317 	return sysfs_emit(buf, "%d\n", led->id);  in show_id()
323  *   0 - 2048 us (default)
324  *   1 - 262 ms
325  *   2 - 524 ms
326  *   3 - 1.049 s
327  *   4 - 2.097 s
328  *   5 - 4.194 s
329  *   6 - 8.389 s
330  *   7 - 16.78 s
343 	ret = lm3533_read(led->lm3533, reg, &val);  in show_risefalltime()
375 		return -EINVAL;  in store_risefalltime()
378 	ret = lm3533_write(led->lm3533, reg, val);  in store_risefalltime()
412 	ret = lm3533_read(led->lm3533, reg, &val);  in show_als_channel()
434 		return -EINVAL;  in store_als_channel()
438 		return -EINVAL;  in store_als_channel()
442 	val = channel - 1;  in store_als_channel()
444 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_als_channel()
462 	ret = lm3533_read(led->lm3533, reg, &val);  in show_als_en()
484 		return -EINVAL;  in store_als_en()
494 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_als_en()
512 	ret = lm3533_read(led->lm3533, reg, &val);  in show_linear()
537 		return -EINVAL;  in store_linear()
547 	ret = lm3533_update(led->lm3533, reg, val, mask);  in store_linear()
563 	ret = lm3533_ctrlbank_get_pwm(&led->cb, &val);  in show_pwm()
580 		return -EINVAL;  in store_pwm()
582 	ret = lm3533_ctrlbank_set_pwm(&led->cb, val);  in store_pwm()
594 static LM3533_ATTR_RW(pwm);
614 	umode_t mode = attr->mode;  in lm3533_led_attr_is_visible()
618 		if (!led->lm3533->have_als)  in lm3533_led_attr_is_visible()
640 	ret = lm3533_ctrlbank_set_max_current(&led->cb, pdata->max_current);  in lm3533_led_setup()
644 	return lm3533_ctrlbank_set_pwm(&led->cb, pdata->pwm);  in lm3533_led_setup()
654 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_probe()
656 	lm3533 = dev_get_drvdata(pdev->dev.parent);  in lm3533_led_probe()
658 		return -EINVAL;  in lm3533_led_probe()
660 	pdata = dev_get_platdata(&pdev->dev);  in lm3533_led_probe()
662 		dev_err(&pdev->dev, "no platform data\n");  in lm3533_led_probe()
663 		return -EINVAL;  in lm3533_led_probe()
666 	if (pdev->id < 0 || pdev->id >= LM3533_LVCTRLBANK_COUNT) {  in lm3533_led_probe()
667 		dev_err(&pdev->dev, "illegal LED id %d\n", pdev->id);  in lm3533_led_probe()
668 		return -EINVAL;  in lm3533_led_probe()
671 	led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);  in lm3533_led_probe()
673 		return -ENOMEM;  in lm3533_led_probe()
675 	led->lm3533 = lm3533;  in lm3533_led_probe()
676 	led->cdev.name = pdata->name;  in lm3533_led_probe()
677 	led->cdev.default_trigger = pdata->default_trigger;  in lm3533_led_probe()
678 	led->cdev.brightness_set_blocking = lm3533_led_set;  in lm3533_led_probe()
679 	led->cdev.brightness_get = lm3533_led_get;  in lm3533_led_probe()
680 	led->cdev.blink_set = lm3533_led_blink_set;  in lm3533_led_probe()
681 	led->cdev.brightness = LED_OFF;  in lm3533_led_probe()
682 	led->cdev.groups = lm3533_led_attribute_groups;  in lm3533_led_probe()
683 	led->id = pdev->id;  in lm3533_led_probe()
685 	mutex_init(&led->mutex);  in lm3533_led_probe()
691 	led->cb.lm3533 = lm3533;  in lm3533_led_probe()
692 	led->cb.id = lm3533_led_get_ctrlbank_id(led);  in lm3533_led_probe()
693 	led->cb.dev = lm3533->dev;  in lm3533_led_probe()
697 	ret = led_classdev_register(pdev->dev.parent, &led->cdev);  in lm3533_led_probe()
699 		dev_err(&pdev->dev, "failed to register LED %d\n", pdev->id);  in lm3533_led_probe()
703 	led->cb.dev = led->cdev.dev;  in lm3533_led_probe()
709 	ret = lm3533_ctrlbank_enable(&led->cb);  in lm3533_led_probe()
716 	led_classdev_unregister(&led->cdev);  in lm3533_led_probe()
725 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_remove()
727 	lm3533_ctrlbank_disable(&led->cb);  in lm3533_led_remove()
728 	led_classdev_unregister(&led->cdev);  in lm3533_led_remove()
738 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_led_shutdown()
740 	lm3533_ctrlbank_disable(&led->cb);  in lm3533_led_shutdown()
741 	lm3533_led_set(&led->cdev, LED_OFF);		/* disable blink */  in lm3533_led_shutdown()
746 		.name = "lm3533-leds",
757 MODULE_ALIAS("platform:lm3533-leds");