drivers/iio/light/adux1020.c

File Facts

System

Linux kernel

Corpus path

drivers/iio/light/adux1020.c

Extension

.c

Size

19412 bytes

Lines

845

Domain

Driver Families

Bucket

drivers/iio

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.

• 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bitfield.h
• linux/delay.h
• linux/err.h
• linux/i2c.h
• linux/init.h
• linux/interrupt.h
• linux/irq.h
• linux/module.h
• linux/mutex.h
• linux/regmap.h
• linux/iio/iio.h
• linux/iio/sysfs.h
• linux/iio/events.h

Detected Declarations

• struct adux1020_data
• struct adux1020_mode_data
• enum adux1020_op_modes
• function adux1020_flush_fifo
• function adux1020_read_fifo
• function adux1020_set_mode
• function adux1020_measure
• function adux1020_read_raw
• function adux1020_find_index
• function adux1020_write_raw
• function adux1020_write_event_config
• function adux1020_read_event_config
• function adux1020_read_thresh
• function adux1020_write_thresh
• function adux1020_interrupt_handler
• function adux1020_chip_init
• function adux1020_probe

Annotated Snippet

struct adux1020_data {
	struct i2c_client *client;
	struct iio_dev *indio_dev;
	struct mutex lock;
	struct regmap *regmap;
};

struct adux1020_mode_data {
	u8 bytes;
	u8 buf_len;
	u16 int_en;
};

static const struct adux1020_mode_data adux1020_modes[] = {
	[ADUX1020_MODE_PROX_I] = {
		.bytes = 2,
		.buf_len = 1,
		.int_en = ADUX1020_PROX_INT_ENABLE,
	},
};

static const struct regmap_config adux1020_regmap_config = {
	.name = "adux1020_regmap",
	.reg_bits = 8,
	.val_bits = 16,
	.max_register = 0x6F,
};

static const struct reg_sequence adux1020_def_conf[] = {
	{ 0x000c, 0x000f },
	{ 0x0010, 0x1010 },
	{ 0x0011, 0x004c },
	{ 0x0012, 0x5f0c },
	{ 0x0013, 0xada5 },
	{ 0x0014, 0x0080 },
	{ 0x0015, 0x0000 },
	{ 0x0016, 0x0600 },
	{ 0x0017, 0x0000 },
	{ 0x0018, 0x2693 },
	{ 0x0019, 0x0004 },
	{ 0x001a, 0x4280 },
	{ 0x001b, 0x0060 },
	{ 0x001c, 0x2094 },
	{ 0x001d, 0x0020 },
	{ 0x001e, 0x0001 },
	{ 0x001f, 0x0100 },
	{ 0x0020, 0x0320 },
	{ 0x0021, 0x0A13 },
	{ 0x0022, 0x0320 },
	{ 0x0023, 0x0113 },
	{ 0x0024, 0x0000 },
	{ 0x0025, 0x2412 },
	{ 0x0026, 0x2412 },
	{ 0x0027, 0x0022 },
	{ 0x0028, 0x0000 },
	{ 0x0029, 0x0300 },
	{ 0x002a, 0x0700 },
	{ 0x002b, 0x0600 },
	{ 0x002c, 0x6000 },
	{ 0x002d, 0x4000 },
	{ 0x002e, 0x0000 },
	{ 0x002f, 0x0000 },
	{ 0x0030, 0x0000 },
	{ 0x0031, 0x0000 },
	{ 0x0032, 0x0040 },
	{ 0x0033, 0x0008 },
	{ 0x0034, 0xE400 },
	{ 0x0038, 0x8080 },
	{ 0x0039, 0x8080 },
	{ 0x003a, 0x2000 },
	{ 0x003b, 0x1f00 },
	{ 0x003c, 0x2000 },
	{ 0x003d, 0x2000 },
	{ 0x003e, 0x0000 },
	{ 0x0040, 0x8069 },
	{ 0x0041, 0x1f2f },
	{ 0x0042, 0x4000 },
	{ 0x0043, 0x0000 },
	{ 0x0044, 0x0008 },
	{ 0x0046, 0x0000 },
	{ 0x0048, 0x00ef },
	{ 0x0049, 0x0000 },
	{ 0x0045, 0x0000 },
};

static const int adux1020_rates[][2] = {
	{ 0, 100000 },
	{ 0, 200000 },
	{ 0, 500000 },
	{ 1, 0 },

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/delay.h`, `linux/err.h`, `linux/i2c.h`, `linux/init.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/module.h`.
• Detected declarations: `struct adux1020_data`, `struct adux1020_mode_data`, `enum adux1020_op_modes`, `function adux1020_flush_fifo`, `function adux1020_read_fifo`, `function adux1020_set_mode`, `function adux1020_measure`, `function adux1020_read_raw`, `function adux1020_find_index`, `function adux1020_write_raw`.
• Atlas domain: Driver Families / drivers/iio.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.