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Release 4.10 drivers/regulator/act8945a-regulator.c

/*
 * Voltage regulation driver for active-semi ACT8945A PMIC
 *
 * Copyright (C) 2015 Atmel Corporation
 *
 * Author: Wenyou Yang <wenyou.yang@atmel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>

/**
 * ACT8945A Global Register Map.
 */

#define ACT8945A_SYS_MODE	0x00

#define ACT8945A_SYS_CTRL	0x01

#define ACT8945A_DCDC1_VSET1	0x20

#define ACT8945A_DCDC1_VSET2	0x21

#define ACT8945A_DCDC1_CTRL	0x22

#define ACT8945A_DCDC2_VSET1	0x30

#define ACT8945A_DCDC2_VSET2	0x31

#define ACT8945A_DCDC2_CTRL	0x32

#define ACT8945A_DCDC3_VSET1	0x40

#define ACT8945A_DCDC3_VSET2	0x41

#define ACT8945A_DCDC3_CTRL	0x42

#define ACT8945A_LDO1_VSET	0x50

#define ACT8945A_LDO1_CTRL	0x51

#define ACT8945A_LDO2_VSET	0x54

#define ACT8945A_LDO2_CTRL	0x55

#define ACT8945A_LDO3_VSET	0x60

#define ACT8945A_LDO3_CTRL	0x61

#define ACT8945A_LDO4_VSET	0x64

#define ACT8945A_LDO4_CTRL	0x65

/**
 * Field Definitions.
 */

#define ACT8945A_ENA		0x80	
/* ON - [7] */

#define ACT8945A_VSEL_MASK	0x3F	
/* VSET - [5:0] */

/**
 * ACT8945A Voltage Number
 */

#define ACT8945A_VOLTAGE_NUM	64

enum {
	
ACT8945A_ID_DCDC1,
	
ACT8945A_ID_DCDC2,
	
ACT8945A_ID_DCDC3,
	
ACT8945A_ID_LDO1,
	
ACT8945A_ID_LDO2,
	
ACT8945A_ID_LDO3,
	
ACT8945A_ID_LDO4,
	
ACT8945A_REG_NUM,
};


static const struct regulator_linear_range act8945a_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
};


static struct regulator_ops act8945a_ops = {
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};


#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply)		\
	[_family##_ID_##_id] = {                                        \
                .name                   = _name,                        \
                .supply_name            = _supply,                      \
                .of_match               = of_match_ptr("REG_"#_id),     \
                .regulators_node        = of_match_ptr("regulators"),   \
                .id                     = _family##_ID_##_id,           \
                .type                   = REGULATOR_VOLTAGE,            \
                .ops                    = &act8945a_ops,                \
                .n_voltages             = ACT8945A_VOLTAGE_NUM,         \
                .linear_ranges          = act8945a_voltage_ranges,      \
                .n_linear_ranges        = ARRAY_SIZE(act8945a_voltage_ranges), \
                .vsel_reg               = _family##_##_id##_##_vsel_reg, \
                .vsel_mask              = ACT8945A_VSEL_MASK,           \
                .enable_reg             = _family##_##_id##_CTRL,       \
                .enable_mask            = ACT8945A_ENA,                 \
                .owner                  = THIS_MODULE,                  \
        }


static const struct regulator_desc act8945a_regulators[] = {
	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),
	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),
	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),
	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
};


static const struct regulator_desc act8945a_alt_regulators[] = {
	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),
	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),
	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),
	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
};


static int act8945a_pmic_probe(struct platform_device *pdev) { struct regulator_config config = { }; const struct regulator_desc *regulators; struct regulator_dev *rdev; int i, num_regulators; bool voltage_select; voltage_select = of_property_read_bool(pdev->dev.parent->of_node, "active-semi,vsel-high"); if (voltage_select) { regulators = act8945a_alt_regulators; num_regulators = ARRAY_SIZE(act8945a_alt_regulators); } else { regulators = act8945a_regulators; num_regulators = ARRAY_SIZE(act8945a_regulators); } config.dev = &pdev->dev; config.dev->of_node = pdev->dev.parent->of_node; for (i = 0; i < num_regulators; i++) { rdev = devm_regulator_register(&pdev->dev, &regulators[i], &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s regulator\n", regulators[i].name); return PTR_ERR(rdev); } } return 0; }

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static struct platform_driver act8945a_pmic_driver = { .driver = { .name = "act8945a-regulator", }, .probe = act8945a_pmic_probe, }; module_platform_driver(act8945a_pmic_driver); MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver"); MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); MODULE_LICENSE("GPL");

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