linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * HWMON Driver for Dialog DA9052

 *

 * Copyright(c) 2012 Dialog Semiconductor Ltd.

 *

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

 */

​

#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/slab.h>

#include <linux/platform_device.h>

#include <linux/property.h>

​

#include <linux/mfd/da9052/da9052.h>

#include <linux/mfd/da9052/reg.h>

#include <linux/regulator/consumer.h>

​

struct da9052_hwmon {

    struct da9052       *da9052;

    struct mutex        hwmon_lock;

    bool            tsi_as_adc;

    int         tsiref_mv;

    struct regulator    *tsiref;

    struct completion   tsidone;

};

​

static const char * const input_names[] = {

    [DA9052_ADC_VDDOUT] =   "VDDOUT",

    [DA9052_ADC_ICH]    =   "CHARGING CURRENT",

    [DA9052_ADC_TBAT]   =   "BATTERY TEMP",

    [DA9052_ADC_VBAT]   =   "BATTERY VOLTAGE",

    [DA9052_ADC_IN4]    =   "ADC IN4",

    [DA9052_ADC_IN5]    =   "ADC IN5",

    [DA9052_ADC_IN6]    =   "ADC IN6",

    [DA9052_ADC_TSI_XP] =   "ADC TS X+",

    [DA9052_ADC_TSI_YP] =   "ADC TS Y+",

    [DA9052_ADC_TSI_XN] =   "ADC TS X-",

    [DA9052_ADC_TSI_YN] =   "ADC TS Y-",

    [DA9052_ADC_TJUNC]  =   "BATTERY JUNCTION TEMP",

    [DA9052_ADC_VBBAT]  =   "BACK-UP BATTERY VOLTAGE",

};

​

/* Conversion function for VDDOUT and VBAT */

static inline int volt_reg_to_mv(int value)

{

    return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;

}

​

/* Conversion function for ADC channels 4, 5 and 6 */

static inline int input_reg_to_mv(int value)

{

    return DIV_ROUND_CLOSEST(value * 2500, 1023);

}

​

/* Conversion function for VBBAT */

static inline int vbbat_reg_to_mv(int value)

{