drivers/regulator/tps6286x-regulator.c

Source file repositories/reference/linux-study-clean/drivers/regulator/tps6286x-regulator.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/tps6286x-regulator.c
Extension
.c
Size
4192 bytes
Lines
170
Domain
Driver Families
Bucket
drivers/regulator
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

// SPDX-License-Identifier: GPL-2.0-only
// Copyright Axis Communications AB

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>

#include <dt-bindings/regulator/ti,tps62864.h>

#define TPS6286X_VOUT1		0x01
#define TPS6286X_VOUT1_VO1_SET	GENMASK(7, 0)

#define TPS6286X_CONTROL	0x03
#define TPS6286X_CONTROL_FPWM	BIT(4)
#define TPS6286X_CONTROL_SWEN	BIT(5)

#define TPS6286X_STATUS		0x05

#define TPS6286X_MIN_MV		400
#define TPS6286X_MAX_MV		1675
#define TPS6286X_STEP_MV	5

static bool tps6286x_volatile_reg(struct device *dev, unsigned int reg)
{
	return reg == TPS6286X_STATUS;
}

static const struct regmap_config tps6286x_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.cache_type = REGCACHE_MAPLE,
	.volatile_reg = tps6286x_volatile_reg,
};

static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	unsigned int val;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		val = 0;
		break;
	case REGULATOR_MODE_FAST:
		val = TPS6286X_CONTROL_FPWM;
		break;
	default:
		return -EINVAL;
	}

	return regmap_update_bits(rdev->regmap, TPS6286X_CONTROL,
				  TPS6286X_CONTROL_FPWM, val);
}

static unsigned int tps6286x_get_mode(struct regulator_dev *rdev)
{
	unsigned int val;
	int ret;

	ret = regmap_read(rdev->regmap, TPS6286X_CONTROL, &val);
	if (ret < 0)
		return 0;

	return (val & TPS6286X_CONTROL_FPWM) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
}

static const struct regulator_ops tps6286x_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_mode = tps6286x_set_mode,
	.get_mode = tps6286x_get_mode,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
};

static unsigned int tps6286x_of_map_mode(unsigned int mode)
{
	switch (mode) {
	case TPS62864_MODE_NORMAL:
		return REGULATOR_MODE_NORMAL;
	case TPS62864_MODE_FPWM:
		return REGULATOR_MODE_FAST;
	default:
		return REGULATOR_MODE_INVALID;

Annotation

Implementation Notes