linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Atheros AR71XX/9XXX USB PHY driver

 *

 * Copyright (C) 2015-2018 Alban Bedel <albeu@free.fr>

 */

​

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/phy/phy.h>

#include <linux/reset.h>

​

struct ath79_usb_phy {

    struct reset_control *reset;

    /* The suspend override logic is inverted, hence the no prefix

     * to make the code a bit easier to understand.

     */

    struct reset_control *no_suspend_override;

};

​

static int ath79_usb_phy_power_on(struct phy *phy)

{

    struct ath79_usb_phy *priv = phy_get_drvdata(phy);

    int err = 0;

​

    if (priv->no_suspend_override) {

        err = reset_control_assert(priv->no_suspend_override);

        if (err)

            return err;

    }

​

    err = reset_control_deassert(priv->reset);

    if (err && priv->no_suspend_override)

        reset_control_deassert(priv->no_suspend_override);

​

    return err;

}

​

static int ath79_usb_phy_power_off(struct phy *phy)

{

    struct ath79_usb_phy *priv = phy_get_drvdata(phy);

    int err = 0;

​

    err = reset_control_assert(priv->reset);

    if (err)

        return err;

​

    if (priv->no_suspend_override) {

        err = reset_control_deassert(priv->no_suspend_override);

        if (err)

            reset_control_deassert(priv->reset);

    }

​

    return err;

}

​

static const struct phy_ops ath79_usb_phy_ops = {

    .power_on   = ath79_usb_phy_power_on,

    .power_off  = ath79_usb_phy_power_off,

    .owner      = THIS_MODULE,

};

​

static int ath79_usb_phy_probe(struct platform_device *pdev)