drivers/iio/adc/qcom-vadc-common.c

File Facts

System

Linux kernel

Corpus path

drivers/iio/adc/qcom-vadc-common.c

Extension

.c

Size

18667 bytes

Lines

773

Domain

Driver Families

Bucket

drivers/iio

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bug.h
• linux/kernel.h
• linux/bitops.h
• linux/fixp-arith.h
• linux/iio/adc/qcom-vadc-common.h
• linux/math64.h
• linux/log2.h
• linux/err.h
• linux/module.h
• linux/units.h

Detected Declarations

• struct vadc_map_pt
• function qcom_vadc_map_voltage_temp
• function qcom_vadc_map_temp_voltage
• function qcom_vadc_scale_calib
• function qcom_vadc_scale_volt
• function qcom_vadc_scale_therm
• function qcom_vadc_scale_die_temp
• function qcom_vadc_scale_chg_temp
• function qcom_vadc_scale_voltage_code
• function qcom_vadc_scale_code_voltage_factor
• function qcom_vadc7_scale_hw_calib_therm
• function qcom_vadc_scale_hw_calib_volt
• function qcom_vadc_scale_hw_calib_therm
• function qcom_vadc_scale_hw_calib_die_temp
• function qcom_vadc7_scale_hw_calib_die_temp
• function qcom_vadc_scale_hw_smb_temp
• function qcom_vadc_scale_hw_chg5_temp
• function qcom_vadc_scale
• function qcom_adc_tm5_temp_volt_scale
• function qcom_adc_tm5_gen2_temp_res_scale
• function qcom_adc5_hw_scale
• function qcom_adc5_prescaling_from_dt
• function qcom_adc5_hw_settle_time_from_dt
• function qcom_adc5_avg_samples_from_dt
• function qcom_adc5_decimation_from_dt
• function qcom_vadc_decimation_from_dt
• export qcom_vadc_scale
• export qcom_adc_tm5_temp_volt_scale
• export qcom_adc_tm5_gen2_temp_res_scale
• export qcom_adc5_hw_scale
• export qcom_adc5_prescaling_from_dt
• export qcom_adc5_hw_settle_time_from_dt
• export qcom_adc5_avg_samples_from_dt
• export qcom_adc5_decimation_from_dt
• export qcom_vadc_decimation_from_dt

Annotated Snippet

struct vadc_map_pt {
	s32 x;
	s32 y;
};

/* Voltage to temperature */
static const struct vadc_map_pt adcmap_100k_104ef_104fb[] = {
	{1758,	-40000 },
	{1742,	-35000 },
	{1719,	-30000 },
	{1691,	-25000 },
	{1654,	-20000 },
	{1608,	-15000 },
	{1551,	-10000 },
	{1483,	-5000 },
	{1404,	0 },
	{1315,	5000 },
	{1218,	10000 },
	{1114,	15000 },
	{1007,	20000 },
	{900,	25000 },
	{795,	30000 },
	{696,	35000 },
	{605,	40000 },
	{522,	45000 },
	{448,	50000 },
	{383,	55000 },
	{327,	60000 },
	{278,	65000 },
	{237,	70000 },
	{202,	75000 },
	{172,	80000 },
	{146,	85000 },
	{125,	90000 },
	{107,	95000 },
	{92,	100000 },
	{79,	105000 },
	{68,	110000 },
	{59,	115000 },
	{51,	120000 },
	{44,	125000 }
};

/*
 * Voltage to temperature table for 100k pull up for NTCG104EF104 with
 * 1.875V reference.
 */
static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
	{ 1831,	-40000 },
	{ 1814,	-35000 },
	{ 1791,	-30000 },
	{ 1761,	-25000 },
	{ 1723,	-20000 },
	{ 1675,	-15000 },
	{ 1616,	-10000 },
	{ 1545,	-5000 },
	{ 1463,	0 },
	{ 1370,	5000 },
	{ 1268,	10000 },
	{ 1160,	15000 },
	{ 1049,	20000 },
	{ 937,	25000 },
	{ 828,	30000 },
	{ 726,	35000 },
	{ 630,	40000 },
	{ 544,	45000 },
	{ 467,	50000 },
	{ 399,	55000 },
	{ 340,	60000 },
	{ 290,	65000 },
	{ 247,	70000 },
	{ 209,	75000 },
	{ 179,	80000 },
	{ 153,	85000 },
	{ 130,	90000 },
	{ 112,	95000 },
	{ 96,	100000 },
	{ 82,	105000 },
	{ 71,	110000 },
	{ 62,	115000 },
	{ 53,	120000 },
	{ 46,	125000 },
};

static const struct vadc_map_pt adcmap7_die_temp[] = {
	{ 857300, 160000 },
	{ 820100, 140000 },
	{ 782500, 120000 },
	{ 744600, 100000 },
	{ 706400, 80000 },

Annotation

• Immediate include surface: `linux/bug.h`, `linux/kernel.h`, `linux/bitops.h`, `linux/fixp-arith.h`, `linux/iio/adc/qcom-vadc-common.h`, `linux/math64.h`, `linux/log2.h`, `linux/err.h`.
• Detected declarations: `struct vadc_map_pt`, `function qcom_vadc_map_voltage_temp`, `function qcom_vadc_map_temp_voltage`, `function qcom_vadc_scale_calib`, `function qcom_vadc_scale_volt`, `function qcom_vadc_scale_therm`, `function qcom_vadc_scale_die_temp`, `function qcom_vadc_scale_chg_temp`, `function qcom_vadc_scale_voltage_code`, `function qcom_vadc_scale_code_voltage_factor`.
• Atlas domain: Driver Families / drivers/iio.
• Implementation status: integration implementation candidate.

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.