linux-imx

/*

 * HWMON Driver for Dialog DA9055

 *

 * Copyright(c) 2012 Dialog Semiconductor Ltd.

 *

 * Author: David Dajun Chen <dchen@diasemi.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.

 *

 */

​

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/completion.h>

​

#include <linux/mfd/da9055/core.h>

#include <linux/mfd/da9055/reg.h>

​

#define DA9055_ADCIN_DIV    102

#define DA9055_VSYS_DIV 85

​

#define DA9055_ADC_VSYS 0

#define DA9055_ADC_ADCIN1   1

#define DA9055_ADC_ADCIN2   2

#define DA9055_ADC_ADCIN3   3

#define DA9055_ADC_TJUNC    4

​

struct da9055_hwmon {

    struct da9055   *da9055;

    struct mutex    hwmon_lock;

    struct mutex    irq_lock;

    struct completion done;

};

​

static const char * const input_names[] = {

    [DA9055_ADC_VSYS]   = "VSYS",

    [DA9055_ADC_ADCIN1] = "ADC IN1",

    [DA9055_ADC_ADCIN2] = "ADC IN2",

    [DA9055_ADC_ADCIN3] = "ADC IN3",

    [DA9055_ADC_TJUNC]  = "CHIP TEMP",

};

​

static const u8 chan_mux[DA9055_ADC_TJUNC + 1] = {

    [DA9055_ADC_VSYS]   = DA9055_ADC_MUX_VSYS,

    [DA9055_ADC_ADCIN1] = DA9055_ADC_MUX_ADCIN1,

    [DA9055_ADC_ADCIN2] = DA9055_ADC_MUX_ADCIN2,

    [DA9055_ADC_ADCIN3] = DA9055_ADC_MUX_ADCIN3,

    [DA9055_ADC_TJUNC]  = DA9055_ADC_MUX_T_SENSE,

};

​

static int da9055_adc_manual_read(struct da9055_hwmon *hwmon,

                    unsigned char channel)

{

    int ret;