linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Mediatek GNSS receiver driver

 *

 * Copyright (C) 2018 Johan Hovold <johan@kernel.org>

 */

​

#include <linux/errno.h>

#include <linux/gnss.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/regulator/consumer.h>

#include <linux/serdev.h>

​

#include "serial.h"

​

struct mtk_data {

    struct regulator *vbackup;

    struct regulator *vcc;

};

​

static int mtk_set_active(struct gnss_serial *gserial)

{

    struct mtk_data *data = gnss_serial_get_drvdata(gserial);

    int ret;

​

    ret = regulator_enable(data->vcc);

    if (ret)

        return ret;

​

    return 0;

}

​

static int mtk_set_standby(struct gnss_serial *gserial)

{

    struct mtk_data *data = gnss_serial_get_drvdata(gserial);

    int ret;

​

    ret = regulator_disable(data->vcc);

    if (ret)

        return ret;

​

    return 0;

}

​

static int mtk_set_power(struct gnss_serial *gserial,

             enum gnss_serial_pm_state state)

{

    switch (state) {

    case GNSS_SERIAL_ACTIVE:

        return mtk_set_active(gserial);

    case GNSS_SERIAL_OFF:

    case GNSS_SERIAL_STANDBY:

        return mtk_set_standby(gserial);

    }

​

    return -EINVAL;

}

​

static const struct gnss_serial_ops mtk_gserial_ops = {

    .set_power = mtk_set_power,