linux-imx

/*

 * Hardware monitoring driver for LM25056 / LM25066 / LM5064 / LM5066

 *

 * Copyright (c) 2011 Ericsson AB.

 * Copyright (c) 2013 Guenter Roeck

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

​

#include <linux/bitops.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 "pmbus.h"

​

enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };

​

#define LM25066_READ_VAUX       0xd0

#define LM25066_MFR_READ_IIN        0xd1

#define LM25066_MFR_READ_PIN        0xd2

#define LM25066_MFR_IIN_OC_WARN_LIMIT   0xd3

#define LM25066_MFR_PIN_OP_WARN_LIMIT   0xd4

#define LM25066_READ_PIN_PEAK       0xd5

#define LM25066_CLEAR_PIN_PEAK      0xd6

#define LM25066_DEVICE_SETUP        0xd9

#define LM25066_READ_AVG_VIN        0xdc

#define LM25066_READ_AVG_VOUT       0xdd

#define LM25066_READ_AVG_IIN        0xde

#define LM25066_READ_AVG_PIN        0xdf

​

#define LM25066_DEV_SETUP_CL        BIT(4)  /* Current limit */

​

/* LM25056 only */

​

#define LM25056_VAUX_OV_WARN_LIMIT  0xe3

#define LM25056_VAUX_UV_WARN_LIMIT  0xe4

​

#define LM25056_MFR_STS_VAUX_OV_WARN    BIT(1)

#define LM25056_MFR_STS_VAUX_UV_WARN    BIT(0)

​

struct __coeff {

    short m, b, R;

};

​

#define PSC_CURRENT_IN_L    (PSC_NUM_CLASSES)

#define PSC_POWER_L     (PSC_NUM_CLASSES + 1)

​

static struct __coeff lm25066_coeff[6][PSC_NUM_CLASSES + 2] = {