linux-imx

/*

 * drivers/regulator/ab3100.c

 *

 * Copyright (C) 2008-2009 ST-Ericsson AB

 * License terms: GNU General Public License (GPL) version 2

 * Low-level control of the AB3100 IC Low Dropout (LDO)

 * regulators, external regulator and buck converter

 * Author: Mattias Wallin <mattias.wallin@stericsson.com>

 * Author: Linus Walleij <linus.walleij@stericsson.com>

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/mfd/ab3100.h>

#include <linux/mfd/abx500.h>

#include <linux/of.h>

#include <linux/regulator/of_regulator.h>

​

/* LDO registers and some handy masking definitions for AB3100 */

#define AB3100_LDO_A        0x40

#define AB3100_LDO_C        0x41

#define AB3100_LDO_D        0x42

#define AB3100_LDO_E        0x43

#define AB3100_LDO_E_SLEEP  0x44

#define AB3100_LDO_F        0x45

#define AB3100_LDO_G        0x46

#define AB3100_LDO_H        0x47

#define AB3100_LDO_H_SLEEP_MODE 0

#define AB3100_LDO_H_SLEEP_EN   2

#define AB3100_LDO_ON       4

#define AB3100_LDO_H_VSEL_AC    5

#define AB3100_LDO_K        0x48

#define AB3100_LDO_EXT      0x49

#define AB3100_BUCK     0x4A

#define AB3100_BUCK_SLEEP   0x4B

#define AB3100_REG_ON_MASK  0x10

​

/**

 * struct ab3100_regulator

 * A struct passed around the individual regulator functions

 * @platform_device: platform device holding this regulator

 * @dev: handle to the device

 * @plfdata: AB3100 platform data passed in at probe time

 * @regreg: regulator register number in the AB3100

 */

struct ab3100_regulator {

    struct regulator_dev *rdev;

    struct device *dev;

    struct ab3100_platform_data *plfdata;

    u8 regreg;

};

​

/* The order in which registers are initialized */

static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = {

    AB3100_LDO_A,

    AB3100_LDO_C,

    AB3100_LDO_E,

    AB3100_LDO_E_SLEEP,

    AB3100_LDO_F,

    AB3100_LDO_G,

    AB3100_LDO_H,

    AB3100_LDO_K,

    AB3100_LDO_EXT,

    AB3100_BUCK,

    AB3100_BUCK_SLEEP,

    AB3100_LDO_D,

};

​

/* Preset (hardware defined) voltages for these regulators */

#define LDO_A_VOLTAGE 2750000

#define LDO_C_VOLTAGE 2650000

#define LDO_D_VOLTAGE 2650000

​

static const unsigned int ldo_e_buck_typ_voltages[] = {

    1800000,

    1400000,

    1300000,

    1200000,

    1100000,

    1050000,

    900000,

};

​

static const unsigned int ldo_f_typ_voltages[] = {

    1800000,

    1400000,

    1300000,

    1200000,