148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* LEDs driver for Dialog Semiconductor DA9030/DA9034
|
|
*
|
|
* Copyright (C) 2008 Compulab, Ltd.
|
|
* Mike Rapoport <mike@compulab.co.il>
|
|
*
|
|
* Copyright (C) 2006-2008 Marvell International Ltd.
|
|
* Eric Miao <eric.miao@marvell.com>
|
|
*/
|
|
|
|
#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 <eric.miao@marvell.com>");
|
|
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:da903x-led");
|