/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Device driver for regulators in MAX5970 and MAX5978 IC
 *
 * Copyright (c) 2022 9elements GmbH
 *
 * Author: Patrick Rudolph <[email protected]>
 */

#ifndef _MFD_MAX5970_H
#define _MFD_MAX5970_H

#include <linux/regmap.h>

#define MAX5970_NUM_SWITCHES 2
#define MAX5978_NUM_SWITCHES 1
#define MAX5970_NUM_LEDS     4

struct max5970_data {
    int num_switches;
    u32 irng[MAX5970_NUM_SWITCHES];
    u32 mon_rng[MAX5970_NUM_SWITCHES];
    u32 shunt_micro_ohms[MAX5970_NUM_SWITCHES];
};

enum max5970_chip_type {
    TYPE_MAX5978 = 1,
    TYPE_MAX5970,
};

#define MAX5970_REG_CURRENT_L(ch)        (0x01 + (ch) * 4)
#define MAX5970_REG_CURRENT_H(ch)        (0x00 + (ch) * 4)
#define MAX5970_REG_VOLTAGE_L(ch)        (0x03 + (ch) * 4)
#define MAX5970_REG_VOLTAGE_H(ch)        (0x02 + (ch) * 4)
#define MAX5970_REG_MON_RANGE            0x18
#define  MAX5970_MON_MASK            0x3
#define  MAX5970_MON(reg, ch)            (((reg) >> ((ch) * 2)) & MAX5970_MON_MASK)
#define  MAX5970_MON_MAX_RANGE_UV        16000000

#define MAX5970_REG_CH_UV_WARN_H(ch)        (0x1A + (ch) * 10)
#define MAX5970_REG_CH_UV_WARN_L(ch)        (0x1B + (ch) * 10)
#define MAX5970_REG_CH_UV_CRIT_H(ch)        (0x1C + (ch) * 10)
#define MAX5970_REG_CH_UV_CRIT_L(ch)        (0x1D + (ch) * 10)
#define MAX5970_REG_CH_OV_WARN_H(ch)        (0x1E + (ch) * 10)
#define MAX5970_REG_CH_OV_WARN_L(ch)        (0x1F + (ch) * 10)
#define MAX5970_REG_CH_OV_CRIT_H(ch)        (0x20 + (ch) * 10)
#define MAX5970_REG_CH_OV_CRIT_L(ch)        (0x21 + (ch) * 10)

#define  MAX5970_VAL2REG_H(x)        (((x) >> 2) & 0xFF)
#define  MAX5970_VAL2REG_L(x)        ((x) & 0x3)

#define MAX5970_REG_DAC_FAST(ch)    (0x2E + (ch))

#define MAX5970_FAST2SLOW_RATIO        200

#define MAX5970_REG_STATUS0        0x31
#define  MAX5970_CB_IFAULTF(ch)        (1 << (ch))
#define  MAX5970_CB_IFAULTS(ch)        (1 << ((ch) + 4))

#define MAX5970_REG_STATUS1        0x32
#define  STATUS1_PROT_MASK        0x3
#define  STATUS1_PROT(reg) \
    (((reg) >> 6) & STATUS1_PROT_MASK)
#define  STATUS1_PROT_SHUTDOWN        0
#define  STATUS1_PROT_CLEAR_PG        1
#define  STATUS1_PROT_ALERT_ONLY    2

#define MAX5970_REG_STATUS2        0x33
#define  MAX5970_IRNG_MASK        0x3
#define  MAX5970_IRNG(reg, ch) \
    (((reg) >> ((ch) * 2)) & MAX5970_IRNG_MASK)

#define MAX5970_REG_STATUS3        0x34
#define  MAX5970_STATUS3_ALERT        BIT(4)
#define  MAX5970_STATUS3_PG(ch)        BIT(ch)

#define MAX5970_REG_FAULT0        0x35
#define  UV_STATUS_WARN(ch)        (1 << (ch))
#define  UV_STATUS_CRIT(ch)        (1 << ((ch) + 4))

#define MAX5970_REG_FAULT1        0x36
#define  OV_STATUS_WARN(ch)        (1 << (ch))
#define  OV_STATUS_CRIT(ch)        (1 << ((ch) + 4))

#define MAX5970_REG_FAULT2        0x37
#define  OC_STATUS_WARN(ch)        (1 << (ch))

#define MAX5970_REG_CHXEN        0x3b
#define  CHXEN(ch)            (3 << ((ch) * 2))

#define MAX5970_REG_LED_FLASH        0x43

#define MAX_REGISTERS            0x49
#define ADC_MASK            0x3FF

#endif                /* _MFD_MAX5970_H */