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/*
* max8907-regulator.c -- support regulators in max8907
*
* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
*
* Portions based on drivers/regulator/tps65910-regulator.c,
* Copyright 2010 Texas Instruments Inc.
* Author: Graeme Gregory <gg@slimlogic.co.uk>
* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8907.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define MAX8907_II2RR_VERSION_MASK 0xF0
#define MAX8907_II2RR_VERSION_REV_A 0x00
#define MAX8907_II2RR_VERSION_REV_B 0x10
#define MAX8907_II2RR_VERSION_REV_C 0x30
struct max8907_regulator {
struct regulator_desc desc[MAX8907_NUM_REGULATORS];
struct regulator_dev *rdev[MAX8907_NUM_REGULATORS];
};
#define REG_MBATT() \
[MAX8907_MBATT] = { \
.name = "MBATT", \
.supply_name = "mbatt", \
.id = MAX8907_MBATT, \
.ops = &max8907_mbatt_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
#define REG_LDO(ids, supply, base, min, max, step) \
[MAX8907_##ids] = { \
.name = #ids, \
.supply_name = supply, \
.id = MAX8907_##ids, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &max8907_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base) + MAX8907_VOUT, \
.vsel_mask = 0x3f, \
.enable_reg = (base) + MAX8907_CTL, \
.enable_mask = MAX8907_MASK_LDO_EN, \
}
#define REG_FIXED(ids, supply, voltage) \
[MAX8907_##ids] = { \
.name = #ids, \
.supply_name = supply, \
.id = MAX8907_##ids, \
.n_voltages = 1, \
.ops = &max8907_fixed_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = (voltage), \
}
#define REG_OUT5V(ids, supply, base, voltage) \
[MAX8907_##ids] = { \
.name = #ids, \
.supply_name = supply, \
.id = MAX8907_##ids, \
.n_voltages = 1, \
.ops = &max8907_out5v_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = (voltage), \
.enable_reg = (base), \
.enable_mask = MAX8907_MASK_OUT5V_EN, \
}
#define REG_BBAT(ids, supply, base, min, max, step) \
[MAX8907_##ids] = { \
.name = #ids, \
.supply_name = supply, \
.id = MAX8907_##ids, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &max8907_bbat_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base), \
.vsel_mask = MAX8907_MASK_VBBATTCV, \
}
#define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \
750000, 3900000, 50000)
#define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \
650000, 2225000, 25000)
static struct regulator_ops max8907_mbatt_ops = {
};
static struct regulator_ops max8907_ldo_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops max8907_ldo_hwctl_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops max8907_fixed_ops = {
.list_voltage = regulator_list_voltage_linear,
};
static struct regulator_ops max8907_out5v_ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops max8907_out5v_hwctl_ops = {
.list_voltage = regulator_list_voltage_linear,
};
static struct regulator_ops max8907_bbat_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_desc max8907_regulators[] = {
REG_MBATT(),
REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000),
REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500),
REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000),
LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1),
LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2),
LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3),
LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4),
LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5),
LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6),
LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7),
LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8),
LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9),
LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10),
LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11),
LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12),
LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13),
LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14),
LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15),
LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16),
LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17),
LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18),
LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19),
LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20),
REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000),
REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000),
REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG,
2400000, 3000000, 200000),
REG_FIXED(SDBY, "MBATT", 1200000),
REG_FIXED(VRTC, "MBATT", 3300000),
};
#ifdef CONFIG_OF
#define MATCH(_name, _id) \
[MAX8907_##_id] = { \
.name = #_name, \
.driver_data = (void *)&max8907_regulators[MAX8907_##_id], \
}
static struct of_regulator_match max8907_matches[] = {
MATCH(mbatt, MBATT),
MATCH(sd1, SD1),
MATCH(sd2, SD2),
MATCH(sd3, SD3),
MATCH(ldo1, LDO1),
MATCH(ldo2, LDO2),
MATCH(ldo3, LDO3),
MATCH(ldo4, LDO4),
MATCH(ldo5, LDO5),
MATCH(ldo6, LDO6),
MATCH(ldo7, LDO7),
MATCH(ldo8, LDO8),
MATCH(ldo9, LDO9),
MATCH(ldo10, LDO10),
MATCH(ldo11, LDO11),
MATCH(ldo12, LDO12),
MATCH(ldo13, LDO13),
MATCH(ldo14, LDO14),
MATCH(ldo15, LDO15),
MATCH(ldo16, LDO16),
MATCH(ldo17, LDO17),
MATCH(ldo18, LDO18),
MATCH(ldo19, LDO19),
MATCH(ldo20, LDO20),
MATCH(out5v, OUT5V),
MATCH(out33v, OUT33V),
MATCH(bbat, BBAT),
MATCH(sdby, SDBY),
MATCH(vrtc, VRTC),
};
static int max8907_regulator_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.parent->of_node;
struct device_node *regulators;
int ret;
if (!pdev->dev.parent->of_node)
return 0;
regulators = of_find_node_by_name(np, "regulators");
if (!regulators) {
dev_err(&pdev->dev, "regulators node not found\n");
return -EINVAL;
}
ret = of_regulator_match(pdev->dev.parent, regulators,
max8907_matches,
ARRAY_SIZE(max8907_matches));
if (ret < 0) {
dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
ret);
return ret;
}
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return max8907_matches[index].init_data;
}
static inline struct device_node *match_of_node(int index)
{
return max8907_matches[index].of_node;
}
#else
static int max8907_regulator_parse_dt(struct platform_device *pdev)
{
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return NULL;
}
static inline struct device_node *match_of_node(int index)
{
return NULL;
}
#endif
static __devinit int max8907_regulator_probe(struct platform_device *pdev)
{
struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent);
struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev);
int ret;
struct max8907_regulator *pmic;
unsigned int val;
int i;
struct regulator_config config = {};
struct regulator_init_data *idata;
const char *mbatt_rail_name = NULL;
ret = max8907_regulator_parse_dt(pdev);
if (ret)
return ret;
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic) {
dev_err(&pdev->dev, "Failed to alloc pmic\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, pmic);
memcpy(pmic->desc,
|