linux-imx

/*

 * Maxim MAX77620 Regulator driver

 *

 * Copyright (c) 2016-2018, NVIDIA CORPORATION.  All rights reserved.

 *

 * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>

 *  Laxman Dewangan <ldewangan@nvidia.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 */

​

#include <linux/init.h>

#include <linux/mfd/max77620.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

​

#define max77620_rails(_name)   "max77620-"#_name

​

/* Power Mode */

#define MAX77620_POWER_MODE_NORMAL      3

#define MAX77620_POWER_MODE_LPM         2

#define MAX77620_POWER_MODE_GLPM        1

#define MAX77620_POWER_MODE_DISABLE     0

​

/* SD Slew Rate */

#define MAX77620_SD_SR_13_75            0

#define MAX77620_SD_SR_27_5         1

#define MAX77620_SD_SR_55           2

#define MAX77620_SD_SR_100          3

​

enum max77620_regulators {

    MAX77620_REGULATOR_ID_SD0,

    MAX77620_REGULATOR_ID_SD1,

    MAX77620_REGULATOR_ID_SD2,

    MAX77620_REGULATOR_ID_SD3,

    MAX77620_REGULATOR_ID_SD4,

    MAX77620_REGULATOR_ID_LDO0,

    MAX77620_REGULATOR_ID_LDO1,

    MAX77620_REGULATOR_ID_LDO2,

    MAX77620_REGULATOR_ID_LDO3,

    MAX77620_REGULATOR_ID_LDO4,

    MAX77620_REGULATOR_ID_LDO5,

    MAX77620_REGULATOR_ID_LDO6,

    MAX77620_REGULATOR_ID_LDO7,

    MAX77620_REGULATOR_ID_LDO8,

    MAX77620_NUM_REGS,

};

​

/* Regulator types */

enum max77620_regulator_type {

    MAX77620_REGULATOR_TYPE_SD,

    MAX77620_REGULATOR_TYPE_LDO_N,

    MAX77620_REGULATOR_TYPE_LDO_P,

};

​

struct max77620_regulator_info {

    u8 type;

    u8 fps_addr;

    u8 volt_addr;

    u8 cfg_addr;

    u8 power_mode_mask;

    u8 power_mode_shift;

    u8 remote_sense_addr;

    u8 remote_sense_mask;

    struct regulator_desc desc;

};

​

struct max77620_regulator_pdata {

    int active_fps_src;

    int active_fps_pd_slot;

    int active_fps_pu_slot;

    int suspend_fps_src;

    int suspend_fps_pd_slot;

    int suspend_fps_pu_slot;

    int current_mode;

    int power_ok;

    int ramp_rate_setting;

};

​

struct max77620_regulator {

    struct device *dev;

    struct regmap *rmap;

    struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];

    struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];

    int enable_power_mode[MAX77620_NUM_REGS];