linux-imx

/*

 * Driver for SMM665 Power Controller / Monitor

 *

 * Copyright (C) 2010 Ericsson AB.

 *

 * 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; version 2 of the License.

 *

 * This driver should also work for SMM465, SMM764, and SMM766, but is untested

 * for those chips. Only monitoring functionality is implemented.

 *

 * Datasheets:

 * http://www.summitmicro.com/prod_select/summary/SMM665/SMM665B_2089_20.pdf

 * http://www.summitmicro.com/prod_select/summary/SMM766B/SMM766B_2122.pdf

 */

​

#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/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/delay.h>

#include <linux/jiffies.h>

​

/* Internal reference voltage (VREF, x 1000 */

#define SMM665_VREF_ADC_X1000   1250

​

/* module parameters */

static int vref = SMM665_VREF_ADC_X1000;

module_param(vref, int, 0);

MODULE_PARM_DESC(vref, "Reference voltage in mV");

​

enum chips { smm465, smm665, smm665c, smm764, smm766 };

​

/*

 * ADC channel addresses

 */

#define SMM665_MISC16_ADC_DATA_A    0x00

#define SMM665_MISC16_ADC_DATA_B    0x01

#define SMM665_MISC16_ADC_DATA_C    0x02

#define SMM665_MISC16_ADC_DATA_D    0x03

#define SMM665_MISC16_ADC_DATA_E    0x04

#define SMM665_MISC16_ADC_DATA_F    0x05

#define SMM665_MISC16_ADC_DATA_VDD  0x06

#define SMM665_MISC16_ADC_DATA_12V  0x07

#define SMM665_MISC16_ADC_DATA_INT_TEMP 0x08

#define SMM665_MISC16_ADC_DATA_AIN1 0x09

#define SMM665_MISC16_ADC_DATA_AIN2 0x0a

​

/*

 * Command registers

 */

#define SMM665_MISC8_CMD_STS        0x80

#define SMM665_MISC8_STATUS1        0x81

#define SMM665_MISC8_STATUSS2       0x82

#define SMM665_MISC8_IO_POLARITY    0x83

#define SMM665_MISC8_PUP_POLARITY   0x84

#define SMM665_MISC8_ADOC_STATUS1   0x85

#define SMM665_MISC8_ADOC_STATUS2   0x86