path: root/drivers/regulator/s5m8767.c

/*
 * s5m8767.c
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd
 *              http://www.samsung.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/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/s5m87xx/s5m-core.h>
#include <linux/mfd/s5m87xx/s5m-pmic.h>

struct s5m8767_info {
	struct device *dev;
	struct s5m87xx_dev *iodev;
	int num_regulators;
	struct regulator_dev **rdev;
	struct s5m_opmode_data *opmode;

	int ramp_delay;
	bool buck2_ramp;
	bool buck3_ramp;
	bool buck4_ramp;

	bool buck2_gpiodvs;
	bool buck3_gpiodvs;
	bool buck4_gpiodvs;
	u8 buck2_vol[8];
	u8 buck3_vol[8];
	u8 buck4_vol[8];
	int buck_gpios[3];
	int buck_gpioindex;
};

struct s5m_voltage_desc {
	int max;
	int min;
	int step;
};

static const struct s5m_voltage_desc buck_voltage_val1 = {
	.max = 2225000,
	.min =  650000,
	.step =   6250,
};

static const struct s5m_voltage_desc buck_voltage_val2 = {
	.max = 1600000,
	.min =  600000,
	.step =   6250,
};

static const struct s5m_voltage_desc buck_voltage_val3 = {
	.max = 3000000,
	.min =  750000,
	.step =  12500,
};

static const struct s5m_voltage_desc ldo_voltage_val1 = {
	.max = 3950000,
	.min =  800000,
	.step =  50000,
};

static const struct s5m_voltage_desc ldo_voltage_val2 = {
	.max = 2375000,
	.min =  800000,
	.step =  25000,
};

static const struct s5m_voltage_desc *reg_voltage_map[] = {
	[S5M8767_LDO1] = &ldo_voltage_val2,
	[S5M8767_LDO2] = &ldo_voltage_val2,
	[S5M8767_LDO3] = &ldo_voltage_val1,
	[S5M8767_LDO4] = &ldo_voltage_val1,
	[S5M8767_LDO5] = &ldo_voltage_val1,
	[S5M8767_LDO6] = &ldo_voltage_val2,
	[S5M8767_LDO7] = &ldo_voltage_val2,
	[S5M8767_LDO8] = &ldo_voltage_val2,
	[S5M8767_LDO9] = &ldo_voltage_val1,
	[S5M8767_LDO10] = &ldo_voltage_val1,
	[S5M8767_LDO11] = &ldo_voltage_val1,
	[S5M8767_LDO12] = &ldo_voltage_val1,
	[S5M8767_LDO13] = &ldo_voltage_val1,
	[S5M8767_LDO14] = &ldo_voltage_val1,
	[S5M8767_LDO15] = &ldo_voltage_val2,
	[S5M8767_LDO16] = &ldo_voltage_val1,
	[S5M8767_LDO17] = &ldo_voltage_val1,
	[S5M8767_LDO18] = &ldo_voltage_val1,
	[S5M8767_LDO19] = &ldo_voltage_val1,
	[S5M8767_LDO20] = &ldo_voltage_val1,
	[S5M8767_LDO21] = &ldo_voltage_val1,
	[S5M8767_LDO22] = &ldo_voltage_val1,
	[S5M8767_LDO23] = &ldo_voltage_val1,
	[S5M8767_LDO24] = &ldo_voltage_val1,
	[S5M8767_LDO25] = &ldo_voltage_val1,
	[S5M8767_LDO26] = &ldo_voltage_val1,
	[S5M8767_LDO27] = &ldo_voltage_val1,
	[S5M8767_LDO28] = &ldo_voltage_val1,
	[S5M8767_BUCK1] = &buck_voltage_val1,
	[S5M8767_BUCK2] = &buck_voltage_val2,
	[S5M8767_BUCK3] = &buck_voltage_val2,
	[S5M8767_BUCK4] = &buck_voltage_val2,
	[S5M8767_BUCK5] = &buck_voltage_val1,
	[S5M8767_BUCK6] = &buck_voltage_val1,
	[S5M8767_BUCK7] = NULL,
	[S5M8767_BUCK8] = NULL,
	[S5M8767_BUCK9] = &buck_voltage_val3,
};

static int s5m8767_list_voltage(struct regulator_dev *rdev,
				unsigned int selector)
{
	const struct s5m_voltage_desc *desc;
	int reg_id = rdev_get_id(rdev);
	int val;

	if (reg_id >= ARRAY_SIZE(reg_voltage_map) || reg_id < 0)
		return -EINVAL;

	desc = reg_voltage_map[reg_id];
	if (desc == NULL)
		return -EINVAL;

	val = desc->min + desc->step * selector;
	if (val > desc->max)
		return -EINVAL;

	return val;
}

unsigned int s5m8767_opmode_reg[][4] = {
	/* {OFF, ON, LOWPOWER, SUSPEND} */
	/* LDO1 ... LDO28 */
	{0x0, 0x3, 0x2, 0x1}, /* LDO1 */
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x0, 0x0, 0x0},
	{0x0, 0x3, 0x2, 0x1}, /* LDO5 */
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x3, 0x2, 0x1},
	{0x0, 0x3, 0x2, 0x1}, /* LDO10 */
	{0x0,