linux-imx

/*

 * MFD core driver for Ricoh RN5T618 PMIC

 *

 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>

 * Copyright (C) 2016 Toradex AG

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * version 2 as published by the Free Software Foundation.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

​

#include <linux/delay.h>

#include <linux/i2c.h>

#include <linux/mfd/core.h>

#include <linux/mfd/rn5t618.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/reboot.h>

#include <linux/regmap.h>

​

static const struct mfd_cell rn5t618_cells[] = {

    { .name = "rn5t618-regulator" },

    { .name = "rn5t618-wdt" },

};

​

static bool rn5t618_volatile_reg(struct device *dev, unsigned int reg)

{

    switch (reg) {

    case RN5T618_WATCHDOGCNT:

    case RN5T618_DCIRQ:

    case RN5T618_ILIMDATAH ... RN5T618_AIN0DATAL:

    case RN5T618_IR_ADC1 ... RN5T618_IR_ADC3:

    case RN5T618_IR_GPR:

    case RN5T618_IR_GPF:

    case RN5T618_MON_IOIN:

    case RN5T618_INTMON:

        return true;

    default:

        return false;

    }

}

​

static const struct regmap_config rn5t618_regmap_config = {

    .reg_bits   = 8,

    .val_bits   = 8,

    .volatile_reg   = rn5t618_volatile_reg,

    .max_register   = RN5T618_MAX_REG,

    .cache_type = REGCACHE_RBTREE,

};

​

static struct rn5t618 *rn5t618_pm_power_off;

static struct notifier_block rn5t618_restart_handler;

​

static void rn5t618_trigger_poweroff_sequence(bool repower)

{

    /* disable automatic repower-on */

    regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,

               RN5T618_REPCNT_REPWRON,

               repower ? RN5T618_REPCNT_REPWRON : 0);

    /* start power-off sequence */