linux-imx

// SPDX-License-Identifier: GPL-2.0+

//

// max77686.c - Regulator driver for the Maxim 77686

//

// Copyright (C) 2012 Samsung Electronics

// Chiwoong Byun <woong.byun@samsung.com>

// Jonghwa Lee <jonghwa3.lee@samsung.com>

//

// This driver is based on max8997.c

​

#include <linux/kernel.h>

#include <linux/bug.h>

#include <linux/err.h>

#include <linux/gpio/consumer.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/mfd/max77686.h>

#include <linux/mfd/max77686-private.h>

​

#define MAX77686_LDO_MINUV  800000

#define MAX77686_LDO_UVSTEP 50000

#define MAX77686_LDO_LOW_MINUV  800000

#define MAX77686_LDO_LOW_UVSTEP 25000

#define MAX77686_BUCK_MINUV 750000

#define MAX77686_BUCK_UVSTEP    50000

#define MAX77686_BUCK_ENABLE_TIME   40      /* us */

#define MAX77686_DVS_ENABLE_TIME    22      /* us */

#define MAX77686_RAMP_DELAY 100000          /* uV/us */

#define MAX77686_DVS_RAMP_DELAY 27500           /* uV/us */

#define MAX77686_DVS_MINUV  600000

#define MAX77686_DVS_UVSTEP 12500

​

/*

 * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.

 * It is the same as 'off' for other regulators.

 */

#define MAX77686_GPIO_CONTROL       0x0

/*

 * Values used for configuring LDOs and bucks.

 * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26

 */

#define MAX77686_LDO_LOWPOWER       0x1

/*

 * On/off controlled by PWRREQ:

 *  - LDO2, 6-8, 10-12, 14-16

 *  - buck[1234]

 */

#define MAX77686_OFF_PWRREQ     0x1

/* Low power mode controlled by PWRREQ: All LDOs */

#define MAX77686_LDO_LOWPOWER_PWRREQ    0x2

/* Forcing low power mode: buck[234] */

#define MAX77686_BUCK_LOWPOWER      0x2

#define MAX77686_NORMAL         0x3

​

#define MAX77686_OPMODE_SHIFT   6

#define MAX77686_OPMODE_BUCK234_SHIFT   4

#define MAX77686_OPMODE_MASK    0x3

​

#define MAX77686_VSEL_MASK  0x3F

#define MAX77686_DVS_VSEL_MASK  0xFF