[linux.git] / drivers / leds / leds-mc13783.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * LEDs driver for Freescale MC13783/MC13892/MC34708
 *
 * Copyright (C) 2010 Philippe Rétornaz
 *
 * Based on leds-da903x:
 * Copyright (C) 2008 Compulab, Ltd.
 *      Mike Rapoport <[email protected]>
 *
 * Copyright (C) 2006-2008 Marvell International Ltd.
 *      Eric Miao <[email protected]>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/of.h>
#include <linux/mfd/mc13xxx.h>

struct mc13xxx_led_devtype {
	int	led_min;
	int	led_max;
	int	num_regs;
	u32	ledctrl_base;
};

struct mc13xxx_led {
	struct led_classdev	cdev;
	int			id;
	struct mc13xxx_leds	*leds;
};

struct mc13xxx_leds {
	struct mc13xxx			*master;
	struct mc13xxx_led_devtype	*devtype;
	int				num_leds;
	struct mc13xxx_led		*led;
};

static unsigned int mc13xxx_max_brightness(int id)
{
	if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
		return 0x0f;
	else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
		return 0x1f;

	return 0x3f;
}

static int mc13xxx_led_set(struct led_classdev *led_cdev,
			    enum led_brightness value)
{
	struct mc13xxx_led *led =
		container_of(led_cdev, struct mc13xxx_led, cdev);
	struct mc13xxx_leds *leds = led->leds;
	unsigned int reg, bank, off, shift;

	switch (led->id) {
	case MC13783_LED_MD:
	case MC13783_LED_AD:
	case MC13783_LED_KP:
		reg = 2;
		shift = 9 + (led->id - MC13783_LED_MD) * 4;
		break;
	case MC13783_LED_R1:
	case MC13783_LED_G1:
	case MC13783_LED_B1:
	case MC13783_LED_R2:
	case MC13783_LED_G2:
	case MC13783_LED_B2:
	case MC13783_LED_R3:
	case MC13783_LED_G3:
	case MC13783_LED_B3:
		off = led->id - MC13783_LED_R1;
		bank = off / 3;
		reg = 3 + bank;
		shift = (off - bank * 3) * 5 + 6;
		break;
	case MC13892_LED_MD:
	case MC13892_LED_AD:
	case MC13892_LED_KP:
		off = led->id - MC13892_LED_MD;
		reg = off / 2;
		shift = 3 + (off - reg * 2) * 12;
		break;
	case MC13892_LED_R:
	case MC13892_LED_G:
	case MC13892_LED_B:
		off = led->id - MC13892_LED_R;
		bank = off / 2;
		reg = 2 + bank;
		shift = (off - bank * 2) * 12 + 3;
		break;
	case MC34708_LED_R:
	case MC34708_LED_G:
		reg = 0;
		shift = 3 + (led->id - MC34708_LED_R) * 12;
		break;
	default:
		BUG();
	}

	return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
			mc13xxx_max_brightness(led->id) << shift,
			value << shift);
}

#ifdef CONFIG_OF
static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
	struct platform_device *pdev)
{
	struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
	struct mc13xxx_leds_platform_data *pdata;
	struct device_node *parent, *child;
	struct device *dev = &pdev->dev;
	int i = 0, ret = -ENODATA;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);

	parent = of_get_child_by_name(dev_of_node(dev->parent), "leds");
	if (!parent)
		goto out_node_put;

	ret = of_property_read_u32_array(parent, "led-control",
					 pdata->led_control,
					 leds->devtype->num_regs);
	if (ret)
		goto out_node_put;

	pdata->num_leds = of_get_available_child_count(parent);

	pdata->led = devm_kcalloc(dev, pdata->num_leds, sizeof(*pdata->led),
				  GFP_KERNEL);
	if (!pdata->led) {
		ret = -ENOMEM;
		goto out_node_put;
	}

	for_each_available_child_of_node(parent, child) {
		const char *str;
		u32 tmp;

		if (of_property_read_u32(child, "reg", &tmp))
			continue;
		pdata->led[i].id = leds->devtype->led_min + tmp;

		if (!of_property_read_string(child, "label", &str))
			pdata->led[i].name = str;
		if (!of_property_read_string(child, "linux,default-trigger",
					     &str))
			pdata->led[i].default_trigger = str;

		i++;
	}

	pdata->num_leds = i;
	ret = i > 0 ? 0 : -ENODATA;

out_node_put:
	of_node_put(parent);

	return ret ? ERR_PTR(ret) : pdata;
}
#else
static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
	struct platform_device *pdev)
{
	return ERR_PTR(-ENOSYS);
}
#endif

static int __init mc13xxx_led_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
	struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
	struct mc13xxx_led_devtype *devtype =
		(struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
	struct mc13xxx_leds *leds;
	int i, id, ret = -ENODATA;
	u32 init_led = 0;

	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
	if (!leds)
		return -ENOMEM;

	leds->devtype = devtype;
	leds->master = mcdev;
	platform_set_drvdata(pdev, leds);

	if (dev_of_node(dev->parent)) {
		pdata = mc13xxx_led_probe_dt(pdev);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
	} else if (!pdata)
		return -ENODATA;

	leds->num_leds = pdata->num_leds;

	if ((leds->num_leds < 1) ||
	    (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
		dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
		return -EINVAL;
	}

	leds->led = devm_kcalloc(dev, leds->num_leds, sizeof(*leds->led),
				 GFP_KERNEL);
	if (!leds->led)
		return -ENOMEM;

	for (i = 0; i < devtype->num_regs; i++) {
		ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
					pdata->led_control[i]);
		if (ret)
			return ret;
	}

	for (i = 0; i < leds->num_leds; i++) {
		const char *name, *trig;

		ret = -EINVAL;

		id = pdata->led[i].id;
		name = pdata->led[i].name;
		trig = pdata->led[i].default_trigger;

		if ((id > devtype->led_max) || (id < devtype->led_min)) {
			dev_err(dev, "Invalid ID %i\n", id);
			break;
		}

		if (init_led & (1 << id)) {
			dev_warn(dev, "LED %i already initialized\n", id);
			break;
		}

		init_led |= 1 << id;
		leds->led[i].id = id;
		leds->led[i].leds = leds;
		leds->led[i].cdev.name = name;
		leds->led[i].cdev.default_trigger = trig;
		leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
		leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set;
		leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);

		ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
		if (ret) {
			dev_err(dev, "Failed to register LED %i\n", id);
			break;
		}
	}

	if (ret)
		while (--i >= 0)
			led_classdev_unregister(&leds->led[i].cdev);

	return ret;
}

static void mc13xxx_led_remove(struct platform_device *pdev)
{
	struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < leds->num_leds; i++)
		led_classdev_unregister(&leds->led[i].cdev);
}

static const struct mc13xxx_led_devtype mc13783_led_devtype = {
	.led_min	= MC13783_LED_MD,
	.led_max	= MC13783_LED_B3,
	.num_regs	= 6,
	.ledctrl_base	= 51,
};

static const struct mc13xxx_led_devtype mc13892_led_devtype = {
	.led_min	= MC13892_LED_MD,
	.led_max	= MC13892_LED_B,
	.num_regs	= 4,
	.ledctrl_base	= 51,
};

static const struct mc13xxx_led_devtype mc34708_led_devtype = {
	.led_min	= MC34708_LED_R,
	.led_max	= MC34708_LED_G,
	.num_regs	= 1,
	.ledctrl_base	= 54,
};

static const struct platform_device_id mc13xxx_led_id_table[] = {
	{ "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
	{ "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
	{ "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
	{ }
};
MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);

static struct platform_driver mc13xxx_led_driver = {
	.driver	= {
		.name	= "mc13xxx-led",
	},
	.remove_new	= mc13xxx_led_remove,
	.id_table	= mc13xxx_led_id_table,
};
module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);

MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Philippe Retornaz <[email protected]>");
MODULE_LICENSE("GPL");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
7fdcef8a	2	/*
a59ce658	3	* LEDs driver for Freescale MC13783/MC13892/MC34708
7fdcef8a PR	4	*
	5	* Copyright (C) 2010 Philippe Rétornaz
	6	*
	7	* Based on leds-da903x:
	8	* Copyright (C) 2008 Compulab, Ltd.
	9	* Mike Rapoport <[email protected]>
	10	*
	11	* Copyright (C) 2006-2008 Marvell International Ltd.
	12	* Eric Miao <[email protected]>
7fdcef8a PR	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
7fdcef8a PR	17	#include <linux/platform_device.h>
7fdcef8a PR	18	#include <linux/leds.h>
25c6579f	19	#include <linux/of.h>
f3ca0782	20	#include <linux/mfd/mc13xxx.h>
7fdcef8a	21
9d263813 AS	22	struct mc13xxx_led_devtype {
	23	int led_min;
	24	int led_max;
	25	int num_regs;
a59ce658	26	u32 ledctrl_base;
9d263813 AS	27	};
	28
	29	struct mc13xxx_led {
7fdcef8a	30	struct led_classdev cdev;
7fdcef8a	31	int id;
a59ce658	32	struct mc13xxx_leds *leds;
7fdcef8a PR	33	};
7fdcef8a PR	34
9d263813	35	struct mc13xxx_leds {
a59ce658	36	struct mc13xxx *master;
9d263813 AS	37	struct mc13xxx_led_devtype *devtype;
9d263813 AS	38	int num_leds;
25c6579f	39	struct mc13xxx_led *led;
9d263813 AS	40	};
9d263813 AS	41
677d13f2 AS	42	static unsigned int mc13xxx_max_brightness(int id)
	43	{
	44	if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
	45	return 0x0f;
	46	else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
	47	return 0x1f;
	48
	49	return 0x3f;
	50	}
	51
4330f2f2 AL	52	static int mc13xxx_led_set(struct led_classdev *led_cdev,
4330f2f2 AL	53	enum led_brightness value)
7fdcef8a	54	{
4330f2f2 AL	55	struct mc13xxx_led *led =
4330f2f2 AL	56	container_of(led_cdev, struct mc13xxx_led, cdev);
a59ce658	57	struct mc13xxx_leds *leds = led->leds;
677d13f2	58	unsigned int reg, bank, off, shift;
7fdcef8a PR	59
	60	switch (led->id) {
	61	case MC13783_LED_MD:
7fdcef8a	62	case MC13783_LED_AD:
7fdcef8a	63	case MC13783_LED_KP:
a59ce658 AS	64	reg = 2;
a59ce658 AS	65	shift = 9 + (led->id - MC13783_LED_MD) * 4;
7fdcef8a PR	66	break;
	67	case MC13783_LED_R1:
	68	case MC13783_LED_G1:
	69	case MC13783_LED_B1:
	70	case MC13783_LED_R2:
	71	case MC13783_LED_G2:
	72	case MC13783_LED_B2:
	73	case MC13783_LED_R3:
	74	case MC13783_LED_G3:
	75	case MC13783_LED_B3:
	76	off = led->id - MC13783_LED_R1;
9d263813	77	bank = off / 3;
a59ce658	78	reg = 3 + bank;
9d263813	79	shift = (off - bank * 3) * 5 + 6;
7fdcef8a	80	break;
ae6cdb03	81	case MC13892_LED_MD:
ae6cdb03	82	case MC13892_LED_AD:
ae6cdb03	83	case MC13892_LED_KP:
cce35f35 AK	84	off = led->id - MC13892_LED_MD;
	85	reg = off / 2;
	86	shift = 3 + (off - reg * 2) * 12;
ae6cdb03 AS	87	break;
	88	case MC13892_LED_R:
	89	case MC13892_LED_G:
	90	case MC13892_LED_B:
	91	off = led->id - MC13892_LED_R;
	92	bank = off / 2;
a59ce658	93	reg = 2 + bank;
ae6cdb03	94	shift = (off - bank * 2) * 12 + 3;
ae6cdb03	95	break;
a59ce658 AS	96	case MC34708_LED_R:
	97	case MC34708_LED_G:
	98	reg = 0;
	99	shift = 3 + (led->id - MC34708_LED_R) * 12;
a59ce658	100	break;
9d263813 AS	101	default:
9d263813 AS	102	BUG();
7fdcef8a PR	103	}
7fdcef8a PR	104
4330f2f2	105	return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
677d13f2	106	mc13xxx_max_brightness(led->id) << shift,
4330f2f2	107	value << shift);
7fdcef8a PR	108	}
7fdcef8a PR	109
25c6579f AS	110	#ifdef CONFIG_OF
	111	static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
	112	struct platform_device *pdev)
	113	{
	114	struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
	115	struct mc13xxx_leds_platform_data *pdata;
	116	struct device_node parent, child;
	117	struct device *dev = &pdev->dev;
	118	int i = 0, ret = -ENODATA;
	119
	120	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	121	if (!pdata)
	122	return ERR_PTR(-ENOMEM);
	123
8853c95e	124	parent = of_get_child_by_name(dev_of_node(dev->parent), "leds");
25c6579f AS	125	if (!parent)
	126	goto out_node_put;
	127
	128	ret = of_property_read_u32_array(parent, "led-control",
	129	pdata->led_control,
	130	leds->devtype->num_regs);
	131	if (ret)
	132	goto out_node_put;
	133
99a013c8	134	pdata->num_leds = of_get_available_child_count(parent);
25c6579f	135
a86854d0	136	pdata->led = devm_kcalloc(dev, pdata->num_leds, sizeof(*pdata->led),
25c6579f AS	137	GFP_KERNEL);
	138	if (!pdata->led) {
	139	ret = -ENOMEM;
	140	goto out_node_put;
	141	}
	142
99a013c8	143	for_each_available_child_of_node(parent, child) {
25c6579f AS	144	const char *str;
	145	u32 tmp;
	146
	147	if (of_property_read_u32(child, "reg", &tmp))
	148	continue;
	149	pdata->led[i].id = leds->devtype->led_min + tmp;
	150
	151	if (!of_property_read_string(child, "label", &str))
	152	pdata->led[i].name = str;
	153	if (!of_property_read_string(child, "linux,default-trigger",
	154	&str))
	155	pdata->led[i].default_trigger = str;
	156
	157	i++;
	158	}
	159
	160	pdata->num_leds = i;
	161	ret = i > 0 ? 0 : -ENODATA;
	162
	163	out_node_put:
	164	of_node_put(parent);
	165
	166	return ret ? ERR_PTR(ret) : pdata;
	167	}
	168	#else
	169	static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
	170	struct platform_device *pdev)
	171	{
	172	return ERR_PTR(-ENOSYS);
	173	}
	174	#endif
	175
9d263813	176	static int __init mc13xxx_led_probe(struct platform_device *pdev)
7fdcef8a	177	{
a59ce658 AS	178	struct device *dev = &pdev->dev;
	179	struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
	180	struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
9d263813 AS	181	struct mc13xxx_led_devtype *devtype =
	182	(struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
	183	struct mc13xxx_leds *leds;
25c6579f	184	int i, id, ret = -ENODATA;
a59ce658	185	u32 init_led = 0;
9d263813	186
25c6579f	187	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
9d263813	188	if (!leds)
7fdcef8a	189	return -ENOMEM;
9d263813 AS	190
9d263813 AS	191	leds->devtype = devtype;
a59ce658	192	leds->master = mcdev;
9d263813 AS	193	platform_set_drvdata(pdev, leds);
9d263813 AS	194
8853c95e	195	if (dev_of_node(dev->parent)) {
25c6579f AS	196	pdata = mc13xxx_led_probe_dt(pdev);
	197	if (IS_ERR(pdata))
	198	return PTR_ERR(pdata);
	199	} else if (!pdata)
	200	return -ENODATA;
	201
	202	leds->num_leds = pdata->num_leds;
	203
	204	if ((leds->num_leds < 1) \|\|
	205	(leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
	206	dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
	207	return -EINVAL;
	208	}
	209
a86854d0	210	leds->led = devm_kcalloc(dev, leds->num_leds, sizeof(*leds->led),
25c6579f AS	211	GFP_KERNEL);
	212	if (!leds->led)
	213	return -ENOMEM;
	214
9d263813	215	for (i = 0; i < devtype->num_regs; i++) {
a59ce658 AS	216	ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
a59ce658 AS	217	pdata->led_control[i]);
9d263813	218	if (ret)
3df22c06	219	return ret;
7fdcef8a PR	220	}
7fdcef8a PR	221
25c6579f	222	for (i = 0; i < leds->num_leds; i++) {
9d263813	223	const char name, trig;
7fdcef8a	224
9d263813 AS	225	ret = -EINVAL;
	226
	227	id = pdata->led[i].id;
	228	name = pdata->led[i].name;
	229	trig = pdata->led[i].default_trigger;
9d263813 AS	230
9d263813 AS	231	if ((id > devtype->led_max) \|\| (id < devtype->led_min)) {
a59ce658	232	dev_err(dev, "Invalid ID %i\n", id);
9d263813	233	break;
7fdcef8a PR	234	}
7fdcef8a PR	235
9d263813	236	if (init_led & (1 << id)) {
a59ce658	237	dev_warn(dev, "LED %i already initialized\n", id);
9d263813	238	break;
7fdcef8a PR	239	}
7fdcef8a PR	240
9d263813 AS	241	init_led \|= 1 << id;
9d263813 AS	242	leds->led[i].id = id;
a59ce658	243	leds->led[i].leds = leds;
9d263813 AS	244	leds->led[i].cdev.name = name;
9d263813 AS	245	leds->led[i].cdev.default_trigger = trig;
02e9e11e	246	leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
4330f2f2	247	leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set;
677d13f2	248	leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
7fdcef8a	249
a59ce658	250	ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
7fdcef8a	251	if (ret) {
a59ce658	252	dev_err(dev, "Failed to register LED %i\n", id);
9d263813	253	break;
7fdcef8a PR	254	}
	255	}
	256
9d263813	257	if (ret)
4330f2f2	258	while (--i >= 0)
9d263813	259	led_classdev_unregister(&leds->led[i].cdev);
7fdcef8a	260
7fdcef8a PR	261	return ret;
	262	}
	263
60613020	264	static void mc13xxx_led_remove(struct platform_device *pdev)
7fdcef8a	265	{
9d263813	266	struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
7fdcef8a PR	267	int i;
7fdcef8a PR	268
4330f2f2	269	for (i = 0; i < leds->num_leds; i++)
9d263813	270	led_classdev_unregister(&leds->led[i].cdev);
7fdcef8a PR	271	}
7fdcef8a PR	272
9d263813 AS	273	static const struct mc13xxx_led_devtype mc13783_led_devtype = {
	274	.led_min = MC13783_LED_MD,
	275	.led_max = MC13783_LED_B3,
	276	.num_regs = 6,
a59ce658	277	.ledctrl_base = 51,
9d263813 AS	278	};
9d263813 AS	279
ae6cdb03 AS	280	static const struct mc13xxx_led_devtype mc13892_led_devtype = {
	281	.led_min = MC13892_LED_MD,
	282	.led_max = MC13892_LED_B,
	283	.num_regs = 4,
a59ce658 AS	284	.ledctrl_base = 51,
	285	};
	286
	287	static const struct mc13xxx_led_devtype mc34708_led_devtype = {
	288	.led_min = MC34708_LED_R,
	289	.led_max = MC34708_LED_G,
	290	.num_regs = 1,
	291	.ledctrl_base = 54,
ae6cdb03 AS	292	};
ae6cdb03 AS	293
9d263813 AS	294	static const struct platform_device_id mc13xxx_led_id_table[] = {
9d263813 AS	295	{ "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
ae6cdb03	296	{ "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
a59ce658	297	{ "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
9d263813 AS	298	{ }
	299	};
	300	MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
	301
	302	static struct platform_driver mc13xxx_led_driver = {
7fdcef8a	303	.driver = {
9d263813	304	.name = "mc13xxx-led",
7fdcef8a	305	},
60613020	306	.remove_new = mc13xxx_led_remove,
9d263813	307	.id_table = mc13xxx_led_id_table,
7fdcef8a	308	};
9d263813	309	module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
7fdcef8a	310
9d263813	311	MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
7fdcef8a PR	312	MODULE_AUTHOR("Philippe Retornaz <[email protected]>");
7fdcef8a PR	313	MODULE_LICENSE("GPL");