linux-imx

/*

 * Hardware monitoring driver for LTC2978 and compatible chips.

 *

 * Copyright (c) 2011 Ericsson AB.

 * Copyright (c) 2013, 2014, 2015 Guenter Roeck

 * Copyright (c) 2015 Linear Technology

 * Copyright (c) 2018 Analog Devices Inc.

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 */

​

#include <linux/delay.h>

#include <linux/jiffies.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/regulator/driver.h>

#include "pmbus.h"

​

enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,

    ltc3883, ltc3886, ltc3887, ltm2987, ltm4675, ltm4676, ltm4686 };

​

/* Common for all chips */

#define LTC2978_MFR_VOUT_PEAK       0xdd

#define LTC2978_MFR_VIN_PEAK        0xde

#define LTC2978_MFR_TEMPERATURE_PEAK    0xdf

#define LTC2978_MFR_SPECIAL_ID      0xe7    /* Undocumented on LTC3882 */

#define LTC2978_MFR_COMMON      0xef

​

/* LTC2974, LTC2975, LCT2977, LTC2980, LTC2978, and LTM2987 */

#define LTC2978_MFR_VOUT_MIN        0xfb

#define LTC2978_MFR_VIN_MIN     0xfc

#define LTC2978_MFR_TEMPERATURE_MIN 0xfd

​

/* LTC2974, LTC2975 */

#define LTC2974_MFR_IOUT_PEAK       0xd7

#define LTC2974_MFR_IOUT_MIN        0xd8

​

/* LTC3880, LTC3882, LTC3883, LTC3887, LTM4675, and LTM4676 */

#define LTC3880_MFR_IOUT_PEAK       0xd7

#define LTC3880_MFR_CLEAR_PEAKS     0xe3

#define LTC3880_MFR_TEMPERATURE2_PEAK   0xf4

​

/* LTC3883 and LTC3886 only */

#define LTC3883_MFR_IIN_PEAK        0xe1

​

/* LTC2975 only */

#define LTC2975_MFR_IIN_PEAK        0xc4

#define LTC2975_MFR_IIN_MIN     0xc5

#define LTC2975_MFR_PIN_PEAK        0xc6

#define LTC2975_MFR_PIN_MIN     0xc7

​

#define LTC2978_ID_MASK         0xfff0

​

#define LTC2974_ID          0x0210

#define LTC2975_ID          0x0220

#define LTC2977_ID          0x0130

#define LTC2978_ID_REV1         0x0110  /* Early revision */

#define LTC2978_ID_REV2         0x0120

#define LTC2980_ID_A            0x8030  /* A/B for two die IDs */

#define LTC2980_ID_B            0x8040

#define LTC3880_ID          0x4020

#define LTC3882_ID          0x4200

#define LTC3882_ID_D1           0x4240  /* Dash 1 */

#define LTC3883_ID          0x4300

#define LTC3886_ID          0x4600

#define LTC3887_ID          0x4700

#define LTM2987_ID_A            0x8010  /* A/B for two die IDs */

#define LTM2987_ID_B            0x8020

#define LTM4675_ID          0x47a0

#define LTM4676_ID_REV1         0x4400

#define LTM4676_ID_REV2         0x4480

#define LTM4676A_ID         0x47e0

#define LTM4686_ID          0x4770

​

#define LTC2974_NUM_PAGES       4

#define LTC2978_NUM_PAGES       8

#define LTC3880_NUM_PAGES       2

#define LTC3883_NUM_PAGES       1

​

#define LTC_POLL_TIMEOUT        100 /* in milli-seconds */