linux-imx

/*

 * STTS751 sensor driver

 *

 * Copyright (C) 2016-2017 Istituto Italiano di Tecnologia - RBCS - EDL

 * Robotics, Brain and Cognitive Sciences department

 * Electronic Design Laboratory

 *

 * Written by Andrea Merello <andrea.merello@gmail.com>

 *

 * Based on  LM95241 driver and LM90 driver

 *

 * 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/bitops.h>

#include <linux/err.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/jiffies.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/property.h>

#include <linux/slab.h>

#include <linux/sysfs.h>

#include <linux/util_macros.h>

​

#define DEVNAME "stts751"

​

static const unsigned short normal_i2c[] = {

    0x48, 0x49, 0x38, 0x39,  /* STTS751-0 */

    0x4A, 0x4B, 0x3A, 0x3B,  /* STTS751-1 */

    I2C_CLIENT_END };

​

#define STTS751_REG_TEMP_H  0x00

#define STTS751_REG_STATUS  0x01

#define STTS751_STATUS_TRIPT    BIT(0)

#define STTS751_STATUS_TRIPL    BIT(5)

#define STTS751_STATUS_TRIPH    BIT(6)

#define STTS751_REG_TEMP_L  0x02

#define STTS751_REG_CONF    0x03

#define STTS751_CONF_RES_MASK   0x0C

#define STTS751_CONF_RES_SHIFT  2

#define STTS751_CONF_EVENT_DIS  BIT(7)

#define STTS751_CONF_STOP   BIT(6)

#define STTS751_REG_RATE    0x04

#define STTS751_REG_HLIM_H  0x05

#define STTS751_REG_HLIM_L  0x06

#define STTS751_REG_LLIM_H  0x07

#define STTS751_REG_LLIM_L  0x08

#define STTS751_REG_TLIM    0x20

#define STTS751_REG_HYST    0x21

#define STTS751_REG_SMBUS_TO    0x22

​

#define STTS751_REG_PROD_ID 0xFD

#define STTS751_REG_MAN_ID  0xFE

#define STTS751_REG_REV_ID  0xFF

​

#define STTS751_0_PROD_ID   0x00

#define STTS751_1_PROD_ID   0x01

#define ST_MAN_ID       0x53

​

/*

 * Possible update intervals are (in mS):

 * 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62.5, 31.25

 * However we are not going to complicate things too much and we stick to the

 * approx value in mS.

 */

static const int stts751_intervals[] = {

    16000, 8000, 4000, 2000, 1000, 500, 250, 125, 63, 31

};

​

static const struct i2c_device_id stts751_id[] = {

    { "stts751", 0 },

    { }

};

​

static const struct of_device_id stts751_of_match[] = {

    { .compatible = "stts751" },

    { },

};

MODULE_DEVICE_TABLE(of, stts751_of_match);