drivers/iio/gyro/adis16136.c

Source file repositories/reference/linux-study-clean/drivers/iio/gyro/adis16136.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/gyro/adis16136.c
Extension
.c
Size
14116 bytes
Lines
587
Domain
Driver Families
Bucket
drivers/iio
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations adis16136_serial_fops = {
	.open = simple_open,
	.read = adis16136_show_serial,
	.llseek = default_llseek,
	.owner = THIS_MODULE,
};

static int adis16136_show_product_id(void *arg, u64 *val)
{
	struct adis16136 *adis16136 = arg;
	u16 prod_id;
	int ret;

	ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_PROD_ID,
		&prod_id);
	if (ret)
		return ret;

	*val = prod_id;

	return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(adis16136_product_id_fops,
	adis16136_show_product_id, NULL, "%llu\n");

static int adis16136_show_flash_count(void *arg, u64 *val)
{
	struct adis16136 *adis16136 = arg;
	uint16_t flash_count;
	int ret;

	ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_FLASH_CNT,
		&flash_count);
	if (ret)
		return ret;

	*val = flash_count;

	return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(adis16136_flash_count_fops,
	adis16136_show_flash_count, NULL, "%lld\n");

static int adis16136_debugfs_init(struct iio_dev *indio_dev)
{
	struct adis16136 *adis16136 = iio_priv(indio_dev);
	struct dentry *d = iio_get_debugfs_dentry(indio_dev);

	debugfs_create_file_unsafe("serial_number", 0400,
		d, adis16136, &adis16136_serial_fops);
	debugfs_create_file_unsafe("product_id", 0400,
		d, adis16136, &adis16136_product_id_fops);
	debugfs_create_file_unsafe("flash_count", 0400,
		d, adis16136, &adis16136_flash_count_fops);

	return 0;
}

#else

static int adis16136_debugfs_init(struct iio_dev *indio_dev)
{
	return 0;
}

#endif

static int adis16136_set_freq(struct adis16136 *adis16136, unsigned int freq)
{
	unsigned int t;

	t = 32768 / freq;
	if (t < 0xf)
		t = 0xf;
	else if (t > 0xffff)
		t = 0xffff;
	else
		t--;

	return adis_write_reg_16(&adis16136->adis, ADIS16136_REG_SMPL_PRD, t);
}

static int __adis16136_get_freq(struct adis16136 *adis16136, unsigned int *freq)
{
	uint16_t t;
	int ret;

	ret = __adis_read_reg_16(&adis16136->adis, ADIS16136_REG_SMPL_PRD, &t);
	if (ret)
		return ret;

Annotation

Implementation Notes