linux-imx

/*

 * Copyright (C) 2011 Alexander Stein <alexander.stein@systec-electronic.com>

 *

 * The LM95245 is a sensor chip made by TI / National Semiconductor.

 * It reports up to two temperatures (its own plus an external one).

 *

 * This driver is based on lm95241.c

 *

 * 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/err.h>

#include <linux/init.h>

#include <linux/hwmon.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

static const unsigned short normal_i2c[] = {

    0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END };

​

/* LM95245 registers */

/* general registers */

#define LM95245_REG_RW_CONFIG1      0x03

#define LM95245_REG_RW_CONVERS_RATE 0x04

#define LM95245_REG_W_ONE_SHOT      0x0F

​

/* diode configuration */

#define LM95245_REG_RW_CONFIG2      0xBF

#define LM95245_REG_RW_REMOTE_OFFH  0x11

#define LM95245_REG_RW_REMOTE_OFFL  0x12

​

/* status registers */

#define LM95245_REG_R_STATUS1       0x02

#define LM95245_REG_R_STATUS2       0x33

​

/* limit registers */

#define LM95245_REG_RW_REMOTE_OS_LIMIT      0x07

#define LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT 0x20

#define LM95245_REG_RW_REMOTE_TCRIT_LIMIT   0x19

#define LM95245_REG_RW_COMMON_HYSTERESIS    0x21

​

/* temperature signed */

#define LM95245_REG_R_LOCAL_TEMPH_S 0x00

#define LM95245_REG_R_LOCAL_TEMPL_S 0x30

#define LM95245_REG_R_REMOTE_TEMPH_S    0x01

#define LM95245_REG_R_REMOTE_TEMPL_S    0x10

/* temperature unsigned */

#define LM95245_REG_R_REMOTE_TEMPH_U    0x31

#define LM95245_REG_R_REMOTE_TEMPL_U    0x32

​

/* id registers */

#define LM95245_REG_R_MAN_ID        0xFE