linux-imx

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

/***************************************************************************

 *   Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com>           *

 *                                                                         *

 ***************************************************************************/

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/platform_device.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include "sch56xx-common.h"

​

#define DRVNAME "sch5627"

#define DEVNAME DRVNAME /* We only support one model */

​

#define SCH5627_HWMON_ID        0xa5

#define SCH5627_COMPANY_ID      0x5c

#define SCH5627_PRIMARY_ID      0xa0

​

#define SCH5627_REG_BUILD_CODE      0x39

#define SCH5627_REG_BUILD_ID        0x3a

#define SCH5627_REG_HWMON_ID        0x3c

#define SCH5627_REG_HWMON_REV       0x3d

#define SCH5627_REG_COMPANY_ID      0x3e

#define SCH5627_REG_PRIMARY_ID      0x3f

#define SCH5627_REG_CTRL        0x40

​

#define SCH5627_NO_TEMPS        8

#define SCH5627_NO_FANS         4

#define SCH5627_NO_IN           5

​

static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {

    0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };

static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {

    0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };

static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {

    0, 0, 1, 1, 0, 0, 0, 1 };

static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {

    0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };

static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {

    0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };

​

static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {

    0x2C, 0x2E, 0x30, 0x32 };

static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {

    0x62, 0x64, 0x66, 0x68 };

​

static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {

    0x22, 0x23, 0x24, 0x25, 0x189 };

static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {

    0xE4, 0xE4, 0xE3, 0xE3, 0x18A };

static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {

    1, 0, 1, 0, 1 };

static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {

    10745, 3660, 9765, 10745, 3660 };

static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {

    "VCC", "VTT", "VBAT", "VTR", "V_IN" };

​

struct sch5627_data {

    unsigned short addr;

    struct device *hwmon_dev;

    struct sch56xx_watchdog_data *watchdog;

    u8 control;

    u8 temp_max[SCH5627_NO_TEMPS];

    u8 temp_crit[SCH5627_NO_TEMPS];

    u16 fan_min[SCH5627_NO_FANS];

​

    struct mutex update_lock;

    unsigned long last_battery; /* In jiffies */

    char valid;         /* !=0 if following fields are valid */

    unsigned long last_updated; /* In jiffies */

    u16 temp[SCH5627_NO_TEMPS];

    u16 fan[SCH5627_NO_FANS];

    u16 in[SCH5627_NO_IN];

};

​

static struct sch5627_data *sch5627_update_device(struct device *dev)

{

    struct sch5627_data *data = dev_get_drvdata(dev);

    struct sch5627_data *ret = data;

    int i, val;

​

    mutex_lock(&data->update_lock);

​

    /* Trigger a Vbat voltage measurement every 5 minutes */