drivers/leds/leds-adp5520.c

Source file repositories/reference/linux-study-clean/drivers/leds/leds-adp5520.c

File Facts

System
Linux kernel
Corpus path
drivers/leds/leds-adp5520.c
Extension
.c
Size
4921 bytes
Lines
196
Domain
Driver Families
Bucket
drivers/leds
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct adp5520_led {
	struct led_classdev	cdev;
	struct device		*master;
	int			id;
	int			flags;
};

static int adp5520_led_set(struct led_classdev *led_cdev,
			   enum led_brightness value)
{
	struct adp5520_led *led;

	led = container_of(led_cdev, struct adp5520_led, cdev);
	return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
			 value >> 2);
}

static int adp5520_led_setup(struct adp5520_led *led)
{
	struct device *dev = led->master;
	int flags = led->flags;
	int ret = 0;

	switch (led->id) {
	case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
		ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
					(flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED1_EN);
		break;
	case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
		ret |= adp5520_set_bits(dev,  ADP5520_LED_TIME,
					((flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK) << 2);
		ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
					 ADP5520_R3_MODE);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED2_EN);
		break;
	case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
		ret |= adp5520_set_bits(dev,  ADP5520_LED_TIME,
					((flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK) << 4);
		ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_C3_MODE);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED3_EN);
		break;
	}

	return ret;
}

static int adp5520_led_prepare(struct platform_device *pdev)
{
	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct device *dev = pdev->dev.parent;
	int ret = 0;

	ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
	ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
		 pdata->fade_out));

	return ret;
}

static int adp5520_led_probe(struct platform_device *pdev)
{
	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct adp5520_led *led, *led_dat;
	struct led_info *cur_led;
	int ret, i;

	if (pdata == NULL) {
		dev_err(&pdev->dev, "missing platform data\n");
		return -ENODEV;
	}

	if (pdata->num_leds > ADP5520_01_MAXLEDS) {
		dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
				 ADP5520_01_MAXLEDS);
		return -EFAULT;
	}

	led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),
				GFP_KERNEL);

Annotation

Implementation Notes