linux-imx

/*

 * Texas Instruments TMP103 SMBus temperature sensor driver

 * Copyright (C) 2014 Heiko Schocher <hs@denx.de>

 *

 * Based on:

 * Texas Instruments TMP102 SMBus temperature sensor driver

 *

 * Copyright (C) 2010 Steven King <sfking@fdwdc.com>

 *

 * 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/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/device.h>

#include <linux/jiffies.h>

#include <linux/regmap.h>

​

#define TMP103_TEMP_REG     0x00

#define TMP103_CONF_REG     0x01

#define TMP103_TLOW_REG     0x02

#define TMP103_THIGH_REG    0x03

​

#define TMP103_CONF_M0      0x01

#define TMP103_CONF_M1      0x02

#define TMP103_CONF_LC      0x04

#define TMP103_CONF_FL      0x08

#define TMP103_CONF_FH      0x10

#define TMP103_CONF_CR0     0x20

#define TMP103_CONF_CR1     0x40

#define TMP103_CONF_ID      0x80

#define TMP103_CONF_SD      (TMP103_CONF_M1)

#define TMP103_CONF_SD_MASK (TMP103_CONF_M0 | TMP103_CONF_M1)

​

#define TMP103_CONFIG       (TMP103_CONF_CR1 | TMP103_CONF_M1)

#define TMP103_CONFIG_MASK  (TMP103_CONF_CR0 | TMP103_CONF_CR1 | \

                 TMP103_CONF_M0 | TMP103_CONF_M1)

​

static inline int tmp103_reg_to_mc(s8 val)

{

    return val * 1000;

}

​

static inline u8 tmp103_mc_to_reg(int val)

{

    return DIV_ROUND_CLOSEST(val, 1000);

}

​