[linux.git] / drivers / leds / leds-da903x.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * LEDs driver for Dialog Semiconductor DA9030/DA9034
 *
 * 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/mfd/da903x.h>
#include <linux/slab.h>

#define DA9030_LED1_CONTROL	0x20
#define DA9030_LED2_CONTROL	0x21
#define DA9030_LED3_CONTROL	0x22
#define DA9030_LED4_CONTROL	0x23
#define DA9030_LEDPC_CONTROL	0x24
#define DA9030_MISC_CONTROL_A	0x26	/* Vibrator Control */

#define DA9034_LED1_CONTROL	0x35
#define DA9034_LED2_CONTROL	0x36
#define DA9034_VIBRA		0x40

struct da903x_led {
	struct led_classdev	cdev;
	struct device		*master;
	int			id;
	int			flags;
};

#define DA9030_LED_OFFSET(id)	((id) - DA9030_ID_LED_1)
#define DA9034_LED_OFFSET(id)	((id) - DA9034_ID_LED_1)

static int da903x_led_set(struct led_classdev *led_cdev,
			   enum led_brightness value)
{
	struct da903x_led *led =
			container_of(led_cdev, struct da903x_led, cdev);
	uint8_t val;
	int offset, ret = -EINVAL;

	switch (led->id) {
	case DA9030_ID_LED_1:
	case DA9030_ID_LED_2:
	case DA9030_ID_LED_3:
	case DA9030_ID_LED_4:
	case DA9030_ID_LED_PC:
		offset = DA9030_LED_OFFSET(led->id);
		val = led->flags & ~0x87;
		val |= value ? 0x80 : 0; /* EN bit */
		val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */
		ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,
				   val);
		break;
	case DA9030_ID_VIBRA:
		val = led->flags & ~0x80;
		val |= value ? 0x80 : 0; /* EN bit */
		ret = da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
		break;
	case DA9034_ID_LED_1:
	case DA9034_ID_LED_2:
		offset = DA9034_LED_OFFSET(led->id);
		val = (value * 0x5f / LED_FULL) & 0x7f;
		val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
		ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,
				   val);
		break;
	case DA9034_ID_VIBRA:
		val = value & 0xfe;
		ret = da903x_write(led->master, DA9034_VIBRA, val);
		break;
	}

	return ret;
}

static int da903x_led_probe(struct platform_device *pdev)
{
	struct led_info *pdata = dev_get_platdata(&pdev->dev);
	struct da903x_led *led;
	int id, ret;

	if (pdata == NULL)
		return 0;

	id = pdev->id;

	if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||
	      (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
		dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
		return -EINVAL;
	}

	led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
	if (!led)
		return -ENOMEM;

	led->cdev.name = pdata->name;
	led->cdev.default_trigger = pdata->default_trigger;
	led->cdev.brightness_set_blocking = da903x_led_set;
	led->cdev.brightness = LED_OFF;

	led->id = id;
	led->flags = pdata->flags;
	led->master = pdev->dev.parent;

	ret = led_classdev_register(led->master, &led->cdev);
	if (ret) {
		dev_err(&pdev->dev, "failed to register LED %d\n", id);
		return ret;
	}

	platform_set_drvdata(pdev, led);

	return 0;
}

static int da903x_led_remove(struct platform_device *pdev)
{
	struct da903x_led *led = platform_get_drvdata(pdev);

	led_classdev_unregister(&led->cdev);

	return 0;
}

static struct platform_driver da903x_led_driver = {
	.driver	= {
		.name	= "da903x-led",
	},
	.probe		= da903x_led_probe,
	.remove		= da903x_led_remove,
};

module_platform_driver(da903x_led_driver);

MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
MODULE_AUTHOR("Eric Miao <[email protected]>");
MODULE_AUTHOR("Mike Rapoport <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da903x-led");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
9e84561c MR	2	/*
	3	* LEDs driver for Dialog Semiconductor DA9030/DA9034
	4	*
	5	* Copyright (C) 2008 Compulab, Ltd.
141bfeea	6	* Mike Rapoport <[email protected]>
9e84561c MR	7	*
9e84561c MR	8	* Copyright (C) 2006-2008 Marvell International Ltd.
141bfeea	9	* Eric Miao <[email protected]>
9e84561c MR	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/kernel.h>
9e84561c MR	14	#include <linux/platform_device.h>
	15	#include <linux/leds.h>
	16	#include <linux/mfd/da903x.h>
5a0e3ad6	17	#include <linux/slab.h>
9e84561c MR	18
	19	#define DA9030_LED1_CONTROL 0x20
	20	#define DA9030_LED2_CONTROL 0x21
	21	#define DA9030_LED3_CONTROL 0x22
	22	#define DA9030_LED4_CONTROL 0x23
	23	#define DA9030_LEDPC_CONTROL 0x24
	24	#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */
	25
	26	#define DA9034_LED1_CONTROL 0x35
	27	#define DA9034_LED2_CONTROL 0x36
	28	#define DA9034_VIBRA 0x40
	29
	30	struct da903x_led {
	31	struct led_classdev cdev;
9e84561c	32	struct device *master;
9e84561c MR	33	int id;
	34	int flags;
	35	};
	36
	37	#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
	38	#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
	39
803bb384 AL	40	static int da903x_led_set(struct led_classdev *led_cdev,
803bb384 AL	41	enum led_brightness value)
9e84561c	42	{
803bb384 AL	43	struct da903x_led *led =
803bb384 AL	44	container_of(led_cdev, struct da903x_led, cdev);
9e84561c	45	uint8_t val;
803bb384	46	int offset, ret = -EINVAL;
9e84561c MR	47
	48	switch (led->id) {
	49	case DA9030_ID_LED_1:
	50	case DA9030_ID_LED_2:
	51	case DA9030_ID_LED_3:
	52	case DA9030_ID_LED_4:
	53	case DA9030_ID_LED_PC:
	54	offset = DA9030_LED_OFFSET(led->id);
	55	val = led->flags & ~0x87;
803bb384 AL	56	val \|= value ? 0x80 : 0; /* EN bit */
	57	val \|= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */
	58	ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,
	59	val);
9e84561c MR	60	break;
	61	case DA9030_ID_VIBRA:
	62	val = led->flags & ~0x80;
803bb384 AL	63	val \|= value ? 0x80 : 0; /* EN bit */
803bb384 AL	64	ret = da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
9e84561c MR	65	break;
	66	case DA9034_ID_LED_1:
	67	case DA9034_ID_LED_2:
	68	offset = DA9034_LED_OFFSET(led->id);
803bb384	69	val = (value * 0x5f / LED_FULL) & 0x7f;
9e84561c	70	val \|= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
803bb384 AL	71	ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,
803bb384 AL	72	val);
9e84561c MR	73	break;
9e84561c MR	74	case DA9034_ID_VIBRA:
803bb384 AL	75	val = value & 0xfe;
803bb384 AL	76	ret = da903x_write(led->master, DA9034_VIBRA, val);
9e84561c MR	77	break;
9e84561c MR	78	}
9e84561c	79
803bb384	80	return ret;
9e84561c MR	81	}
9e84561c MR	82
98ea1ea2	83	static int da903x_led_probe(struct platform_device *pdev)
9e84561c	84	{
87aae1ea	85	struct led_info *pdata = dev_get_platdata(&pdev->dev);
9e84561c MR	86	struct da903x_led *led;
	87	int id, ret;
	88
	89	if (pdata == NULL)
	90	return 0;
	91
	92	id = pdev->id;
	93
	94	if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) \|\|
	95	(id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
	96	dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
	97	return -EINVAL;
	98	}
	99
bad1c898	100	led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
0c9a03b6	101	if (!led)
9e84561c	102	return -ENOMEM;
9e84561c MR	103
	104	led->cdev.name = pdata->name;
	105	led->cdev.default_trigger = pdata->default_trigger;
803bb384	106	led->cdev.brightness_set_blocking = da903x_led_set;
9e84561c MR	107	led->cdev.brightness = LED_OFF;
	108
	109	led->id = id;
	110	led->flags = pdata->flags;
	111	led->master = pdev->dev.parent;
9e84561c	112
6f4aa357	113	ret = led_classdev_register(led->master, &led->cdev);
9e84561c MR	114	if (ret) {
9e84561c MR	115	dev_err(&pdev->dev, "failed to register LED %d\n", id);
bad1c898	116	return ret;
9e84561c MR	117	}
9e84561c MR	118
6f4aa357 JH	119	platform_set_drvdata(pdev, led);
	120
	121	return 0;
	122	}
	123
	124	static int da903x_led_remove(struct platform_device *pdev)
	125	{
	126	struct da903x_led *led = platform_get_drvdata(pdev);
	127
	128	led_classdev_unregister(&led->cdev);
	129
9e84561c MR	130	return 0;
	131	}
	132
	133	static struct platform_driver da903x_led_driver = {
	134	.driver = {
	135	.name = "da903x-led",
9e84561c MR	136	},
9e84561c MR	137	.probe = da903x_led_probe,
6f4aa357	138	.remove = da903x_led_remove,
9e84561c MR	139	};
9e84561c MR	140
892a8843	141	module_platform_driver(da903x_led_driver);
9e84561c MR	142
9e84561c MR	143	MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
141bfeea SK	144	MODULE_AUTHOR("Eric Miao <[email protected]>");
141bfeea SK	145	MODULE_AUTHOR("Mike Rapoport <[email protected]>");
9e84561c MR	146	MODULE_LICENSE("GPL");
9e84561c MR	147	MODULE_ALIAS("platform:da903x-led");