drivers/regulator/rt8092.c

Source file repositories/reference/linux-study-clean/drivers/regulator/rt8092.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/rt8092.c
Extension
.c
Size
8900 bytes
Lines
314
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+
//
// Copyright (c) 2025 Richtek Technology Corp.
//
// Author: ChiYuan Huang <cy_huang@richtek.com>

#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>

#define RT8092_REG_MNTRPT	0x00
#define RT8092_REG_VOUTH	0x10
#define RT8092_REG_VOUTL	0x11
#define RT8092_REG_PWMMODE	0x14
#define RT8092_REG_EVENT	0x18
#define RT8092_REG_VBANKH	0x1C
#define RT8092_REG_VBANKL	0x1D
#define RT8092_REG_VBOUND	0x1E

#define RT8092_TSDEVT_MASK	BIT(7)
#define RT8092_PGEVT_MASK	BIT(0)
#define RT8092_VSEL_MASK	GENMASK(6, 0)
#define RT8092_VOUTEN_MASK	BIT(7)
#define RT8092_FPWML_MASK	BIT(7)
#define RT8092_FPWMH_MASK	BIT(6)
#define RT8092_OCPEVT_MASK	BIT(7)
#define RT8092_SCPEVT_MASK	BIT(4)
#define RT8092_VINUVEVT_MASK	BIT(1)
#define RT8092_VBANK_MASK	GENMASK(1, 0)

#define RT8092_MODE_AUTO	0
#define RT8092_MODE_FPWM	1
#define RT8092_VOUT_BASEUV	303125
#define RT8092_VOUT_STEPUV	3125
#define RT8092_VOUT_MINSEL	15
#define RT8092_NUM_VOLTS	128
#define RT8092_INITSS_US	400

static int rt8092_get_vbank_index(struct regmap *regmap, bool vsel_high, unsigned int *vbank_idx)
{
	unsigned int vbank_reg = vsel_high ? RT8092_REG_VBANKH : RT8092_REG_VBANKL;
	unsigned int index;
	int ret;

	ret = regmap_read(regmap, vbank_reg, &index);
	if (ret)
		return ret;

	*vbank_idx = FIELD_GET(RT8092_VBANK_MASK, index);
	return 0;
}

static int rt8092_set_operating_mode(struct regulator_dev *rdev, unsigned int mode)
{
	const struct regulator_desc *desc = rdev->desc;
	struct regmap *regmap = rdev_get_regmap(rdev);
	unsigned int mode_mask, mode_val;

	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;

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

	return regmap_update_bits(regmap, RT8092_REG_PWMMODE, mode_mask, mode_val);
}

static unsigned int rt8092_get_operating_mode(struct regulator_dev *rdev)
{
	const struct regulator_desc *desc = rdev->desc;
	struct regmap *regmap = rdev_get_regmap(rdev);
	unsigned int mode_mask, mode_val;
	int ret;

	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;

Annotation

Implementation Notes