Quelle  ci_hdrc_imx.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 * Copyright 2025 NXP
 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
 * on behalf of DENX Software Engineering GmbH
 */

#include <linux/module.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/of.h>
#include <linux/clk.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_qos.h>

#include "ci.h"
#include "ci_hdrc_imx.h"

struct ci_hdrc_imx_platform_flag {
 unsigned int flags;
};

static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
 .flags = CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
 .flags = CI_HDRC_IMX28_WRITE_FIX |
  CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_HOST_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_HOST_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_TURN_VBUS_EARLY_ON |
  CI_HDRC_DISABLE_DEVICE_STREAMING,
};

static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
};

static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_HAS_PORTSC_PEC_MISSED |
  CI_HDRC_PMQOS,
};

static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  CI_HDRC_HAS_PORTSC_PEC_MISSED,
};

static const struct ci_hdrc_imx_platform_flag s32g_usb_data = {
 .flags = CI_HDRC_DISABLE_HOST_STREAMING,
};

static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
 { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
 { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
 { .compatible = "nxp,s32g2-usb", .data = &s32g_usb_data},
 { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);

struct ci_hdrc_imx_data {
 struct usb_phy *phy;
 struct platform_device *ci_pdev;
 struct clk *clk;
 struct clk *clk_wakeup;
 struct imx_usbmisc_data *usbmisc_data;
 int wakeup_irq;
 bool supports_runtime_pm;
 bool override_phy_control;
 bool in_lpm;
 struct pinctrl *pinctrl;
 struct pinctrl_state *pinctrl_hsic_active;
 struct regulator *hsic_pad_regulator;
 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
 bool need_three_clks;
 struct clk *clk_ipg;
 struct clk *clk_ahb;
 struct clk *clk_per;
 /* --------------------------------- */
 struct pm_qos_request pm_qos_req;
 const struct ci_hdrc_imx_platform_flag *plat_data;
};

/* Common functions shared by usbmisc drivers */

static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
{
 struct platform_device *misc_pdev;
 struct device_node *np = dev->of_node;
 struct of_phandle_args args;
 struct imx_usbmisc_data *data;
 int ret;

 /*
 * In case the fsl,usbmisc property is not present this device doesn't
 * need usbmisc. Return NULL (which is no error here)
 */
 if (!of_property_present(np, "fsl,usbmisc"))
  return NULL;

 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 if (!data)
  return ERR_PTR(-ENOMEM);

 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
     0, &args);
 if (ret) {
  dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
   ret);
  return ERR_PTR(ret);
 }

 data->index = args.args[0];

 misc_pdev = of_find_device_by_node(args.np);
 of_node_put(args.np);

 if (!misc_pdev)
  return ERR_PTR(-EPROBE_DEFER);

 if (!platform_get_drvdata(misc_pdev)) {
  put_device(&misc_pdev->dev);
  return ERR_PTR(-EPROBE_DEFER);
 }
 data->dev = &misc_pdev->dev;

 /*
 * Check the various over current related properties. If over current
 * detection is disabled we're not interested in the polarity.
 */
 if (of_property_read_bool(np, "disable-over-current")) {
  data->disable_oc = 1;
 } else if (of_property_read_bool(np, "over-current-active-high")) {
  data->oc_pol_active_low = 0;
  data->oc_pol_configured = 1;
 } else if (of_property_read_bool(np, "over-current-active-low")) {
  data->oc_pol_active_low = 1;
  data->oc_pol_configured = 1;
 } else {
  dev_warn(dev, "No over current polarity defined\n");
 }

 data->pwr_pol = of_property_read_bool(np, "power-active-high");
 data->evdo = of_property_read_bool(np, "external-vbus-divider");

 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
  data->ulpi = 1;

 if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
   &data->emp_curr_control))
  data->emp_curr_control = -1;
 if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
   &data->dc_vol_level_adjust))
  data->dc_vol_level_adjust = -1;
 if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",
   &data->rise_fall_time_adjust))
  data->rise_fall_time_adjust = -1;

 return data;
}

/* End of common functions shared by usbmisc drivers*/
static int imx_get_clks(struct device *dev)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret = 0;

 data->clk_ipg = devm_clk_get(dev, "ipg");
 if (IS_ERR(data->clk_ipg)) {
  /* If the platform only needs one primary clock */
  data->clk = devm_clk_get(dev, NULL);
  if (IS_ERR(data->clk)) {
   ret = PTR_ERR(data->clk);
   dev_err(dev,
    "Failed to get clks, err=%ld,%ld\n",
    PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
   return ret;
  }
  /* Get wakeup clock. Not all of the platforms need to
 * handle this clock. So make it optional.
 */
  data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup");
  if (IS_ERR(data->clk_wakeup))
   ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup),
     "Failed to get wakeup clk\n");
  return ret;
 }

 data->clk_ahb = devm_clk_get(dev, "ahb");
 if (IS_ERR(data->clk_ahb)) {
  ret = PTR_ERR(data->clk_ahb);
  dev_err(dev,
   "Failed to get ahb clock, err=%d\n", ret);
  return ret;
 }

 data->clk_per = devm_clk_get(dev, "per");
 if (IS_ERR(data->clk_per)) {
  ret = PTR_ERR(data->clk_per);
  dev_err(dev,
   "Failed to get per clock, err=%d\n", ret);
  return ret;
 }

 data->need_three_clks = true;
 return ret;
}

static int imx_prepare_enable_clks(struct device *dev)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret = 0;

 if (data->need_three_clks) {
  ret = clk_prepare_enable(data->clk_ipg);
  if (ret) {
   dev_err(dev,
    "Failed to prepare/enable ipg clk, err=%d\n",
    ret);
   return ret;
  }

  ret = clk_prepare_enable(data->clk_ahb);
  if (ret) {
   dev_err(dev,
    "Failed to prepare/enable ahb clk, err=%d\n",
    ret);
   clk_disable_unprepare(data->clk_ipg);
   return ret;
  }

  ret = clk_prepare_enable(data->clk_per);
  if (ret) {
   dev_err(dev,
    "Failed to prepare/enable per clk, err=%d\n",
    ret);
   clk_disable_unprepare(data->clk_ahb);
   clk_disable_unprepare(data->clk_ipg);
   return ret;
  }
 } else {
  ret = clk_prepare_enable(data->clk);
  if (ret) {
   dev_err(dev,
    "Failed to prepare/enable clk, err=%d\n",
    ret);
   return ret;
  }
 }

 return ret;
}

static void imx_disable_unprepare_clks(struct device *dev)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 if (data->need_three_clks) {
  clk_disable_unprepare(data->clk_per);
  clk_disable_unprepare(data->clk_ahb);
  clk_disable_unprepare(data->clk_ipg);
 } else {
  clk_disable_unprepare(data->clk);
 }
}

static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
{
 struct device *dev = ci->dev->parent;
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret = 0;
 struct imx_usbmisc_data *mdata = data->usbmisc_data;

 switch (event) {
 case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
  if (data->pinctrl) {
   ret = pinctrl_select_state(data->pinctrl,
     data->pinctrl_hsic_active);
   if (ret)
    dev_err(dev,
     "hsic_active select failed, err=%d\n",
     ret);
  }
  break;
 case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
  ret = imx_usbmisc_hsic_set_connect(mdata);
  if (ret)
   dev_err(dev,
    "hsic_set_connect failed, err=%d\n", ret);
  break;
 case CI_HDRC_CONTROLLER_VBUS_EVENT:
  if (ci->vbus_active)
   ret = imx_usbmisc_charger_detection(mdata, true);
  else
   ret = imx_usbmisc_charger_detection(mdata, false);
  if (ci->usb_phy)
   schedule_work(&ci->usb_phy->chg_work);
  break;
 case CI_HDRC_CONTROLLER_PULLUP_EVENT:
  if (ci->role == CI_ROLE_GADGET &&
      ci->gadget.speed == USB_SPEED_HIGH)
   imx_usbmisc_pullup(data->usbmisc_data,
        ci->gadget.connected);
  break;
 default:
  break;
 }

 return ret;
}

static irqreturn_t ci_wakeup_irq_handler(int irq, void *data)
{
 struct ci_hdrc_imx_data *imx_data = data;

 disable_irq_nosync(irq);
 pm_runtime_resume(&imx_data->ci_pdev->dev);

 return IRQ_HANDLED;
}

static void ci_hdrc_imx_disable_regulator(void *arg)
{
 struct ci_hdrc_imx_data *data = arg;

 regulator_disable(data->hsic_pad_regulator);
}

static int ci_hdrc_imx_probe(struct platform_device *pdev)
{
 struct ci_hdrc_imx_data *data;
 struct ci_hdrc_platform_data pdata = {
  .name  = dev_name(&pdev->dev),
  .capoffset = DEF_CAPOFFSET,
  .flags  = CI_HDRC_HAS_SHORT_PKT_LIMIT,
  .notify_event = ci_hdrc_imx_notify_event,
 };
 int ret;
 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 struct device_node *np = pdev->dev.of_node;
 struct device *dev = &pdev->dev;

 imx_platform_flag = of_device_get_match_data(&pdev->dev);

 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 if (!data)
  return -ENOMEM;

 data->plat_data = imx_platform_flag;
 pdata.flags |= imx_platform_flag->flags;
 platform_set_drvdata(pdev, data);
 data->usbmisc_data = usbmisc_get_init_data(dev);
 if (IS_ERR(data->usbmisc_data))
  return PTR_ERR(data->usbmisc_data);

 if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
  && data->usbmisc_data) {
  pdata.flags |= CI_HDRC_IMX_IS_HSIC;
  data->usbmisc_data->hsic = 1;
  data->pinctrl = devm_pinctrl_get(dev);
  if (PTR_ERR(data->pinctrl) == -ENODEV)
   data->pinctrl = NULL;
  else if (IS_ERR(data->pinctrl)) {
   ret = dev_err_probe(dev, PTR_ERR(data->pinctrl),
          "pinctrl get failed\n");
   goto err_put;
  }

  data->hsic_pad_regulator =
    devm_regulator_get_optional(dev, "hsic");
  if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
   /* no pad regulator is needed */
   data->hsic_pad_regulator = NULL;
  } else if (IS_ERR(data->hsic_pad_regulator)) {
   ret = dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
          "Get HSIC pad regulator error\n");
   goto err_put;
  }

  if (data->hsic_pad_regulator) {
   ret = regulator_enable(data->hsic_pad_regulator);
   if (ret) {
    dev_err(dev,
     "Failed to enable HSIC pad regulator\n");
    goto err_put;
   }
   ret = devm_add_action_or_reset(dev,
     ci_hdrc_imx_disable_regulator, data);
   if (ret) {
    dev_err(dev,
     "Failed to add regulator devm action\n");
    goto err_put;
   }
  }
 }

 /* HSIC pinctrl handling */
 if (data->pinctrl) {
  struct pinctrl_state *pinctrl_hsic_idle;

  pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
  if (IS_ERR(pinctrl_hsic_idle)) {
   dev_err(dev,
    "pinctrl_hsic_idle lookup failed, err=%ld\n",
     PTR_ERR(pinctrl_hsic_idle));
   ret = PTR_ERR(pinctrl_hsic_idle);
   goto err_put;
  }

  ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
  if (ret) {
   dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
   goto err_put;
  }

  data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
        "active");
  if (IS_ERR(data->pinctrl_hsic_active)) {
   dev_err(dev,
    "pinctrl_hsic_active lookup failed, err=%ld\n",
     PTR_ERR(data->pinctrl_hsic_active));
   ret = PTR_ERR(data->pinctrl_hsic_active);
   goto err_put;
  }
 }

 if (pdata.flags & CI_HDRC_PMQOS)
  cpu_latency_qos_add_request(&data->pm_qos_req, 0);

 ret = imx_get_clks(dev);
 if (ret)
  goto qos_remove_request;

 ret = imx_prepare_enable_clks(dev);
 if (ret)
  goto qos_remove_request;

 ret = clk_prepare_enable(data->clk_wakeup);
 if (ret)
  goto err_wakeup_clk;

 data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 if (IS_ERR(data->phy)) {
  ret = PTR_ERR(data->phy);
  if (ret != -ENODEV) {
   dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
   goto err_clk;
  }
  data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
  if (IS_ERR(data->phy)) {
   ret = PTR_ERR(data->phy);
   if (ret == -ENODEV) {
    data->phy = NULL;
   } else {
    dev_err_probe(dev, ret, "Failed to parse phys\n");
    goto err_clk;
   }
  }
 }

 pdata.usb_phy = data->phy;
 if (data->usbmisc_data)
  data->usbmisc_data->usb_phy = data->phy;

 if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
      of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
     of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
  pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
  data->override_phy_control = true;
  ret = usb_phy_init(pdata.usb_phy);
  if (ret) {
   dev_err(dev, "Failed to init phy\n");
   goto err_clk;
  }
 }

 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
  data->supports_runtime_pm = true;

 data->wakeup_irq = platform_get_irq_optional(pdev, 1);
 if (data->wakeup_irq > 0) {
  ret = devm_request_threaded_irq(dev, data->wakeup_irq,
      NULL, ci_wakeup_irq_handler,
      IRQF_ONESHOT | IRQF_NO_AUTOEN,
      pdata.name, data);
  if (ret)
   goto err_clk;
 }

 ret = imx_usbmisc_init(data->usbmisc_data);
 if (ret) {
  dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
  goto phy_shutdown;
 }

 data->ci_pdev = ci_hdrc_add_device(dev,
    pdev->resource, pdev->num_resources,
    &pdata);
 if (IS_ERR(data->ci_pdev)) {
  ret = PTR_ERR(data->ci_pdev);
  dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
  goto phy_shutdown;
 }

 if (data->usbmisc_data) {
  if (!IS_ERR(pdata.id_extcon.edev) ||
      of_property_read_bool(np, "usb-role-switch"))
   data->usbmisc_data->ext_id = 1;

  if (!IS_ERR(pdata.vbus_extcon.edev) ||
      of_property_read_bool(np, "usb-role-switch"))
   data->usbmisc_data->ext_vbus = 1;

  /* usbmisc needs to know dr mode to choose wakeup setting */
  data->usbmisc_data->available_role =
   ci_hdrc_query_available_role(data->ci_pdev);
 }

 ret = imx_usbmisc_init_post(data->usbmisc_data);
 if (ret) {
  dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
  goto disable_device;
 }

 if (data->supports_runtime_pm) {
  pm_runtime_set_active(dev);
  pm_runtime_enable(dev);
 }

 device_set_wakeup_capable(dev, true);

 return 0;

disable_device:
 ci_hdrc_remove_device(data->ci_pdev);
phy_shutdown:
 if (data->override_phy_control)
  usb_phy_shutdown(data->phy);
err_clk:
 clk_disable_unprepare(data->clk_wakeup);
err_wakeup_clk:
 imx_disable_unprepare_clks(dev);
qos_remove_request:
 if (pdata.flags & CI_HDRC_PMQOS)
  cpu_latency_qos_remove_request(&data->pm_qos_req);
 data->ci_pdev = NULL;
err_put:
 if (data->usbmisc_data)
  put_device(data->usbmisc_data->dev);
 return ret;
}

static void ci_hdrc_imx_remove(struct platform_device *pdev)
{
 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);

 if (data->supports_runtime_pm) {
  pm_runtime_get_sync(&pdev->dev);
  pm_runtime_disable(&pdev->dev);
  pm_runtime_put_noidle(&pdev->dev);
 }
 if (data->ci_pdev)
  ci_hdrc_remove_device(data->ci_pdev);
 if (data->override_phy_control)
  usb_phy_shutdown(data->phy);
 if (data->ci_pdev) {
  imx_disable_unprepare_clks(&pdev->dev);
  clk_disable_unprepare(data->clk_wakeup);
  if (data->plat_data->flags & CI_HDRC_PMQOS)
   cpu_latency_qos_remove_request(&data->pm_qos_req);
 }
 if (data->usbmisc_data)
  put_device(data->usbmisc_data->dev);
}

static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
{
 ci_hdrc_imx_remove(pdev);
}

static int imx_controller_suspend(struct device *dev,
       pm_message_t msg)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret = 0;

 dev_dbg(dev, "at %s\n", __func__);

 ret = imx_usbmisc_suspend(data->usbmisc_data,
      PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 if (ret) {
  dev_err(dev,
   "usbmisc suspend failed, ret=%d\n", ret);
  return ret;
 }

 imx_disable_unprepare_clks(dev);

 if (data->wakeup_irq > 0)
  enable_irq(data->wakeup_irq);

 if (data->plat_data->flags & CI_HDRC_PMQOS)
  cpu_latency_qos_remove_request(&data->pm_qos_req);

 data->in_lpm = true;

 return 0;
}

static int imx_controller_resume(struct device *dev,
      pm_message_t msg)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret = 0;

 dev_dbg(dev, "at %s\n", __func__);

 if (!data->in_lpm) {
  WARN_ON(1);
  return 0;
 }

 if (data->plat_data->flags & CI_HDRC_PMQOS)
  cpu_latency_qos_add_request(&data->pm_qos_req, 0);

 if (data->wakeup_irq > 0 &&
     !irqd_irq_disabled(irq_get_irq_data(data->wakeup_irq)))
  disable_irq_nosync(data->wakeup_irq);

 ret = imx_prepare_enable_clks(dev);
 if (ret)
  return ret;

 data->in_lpm = false;

 ret = imx_usbmisc_resume(data->usbmisc_data,
     PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 if (ret) {
  dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
  goto clk_disable;
 }

 return 0;

clk_disable:
 imx_disable_unprepare_clks(dev);
 return ret;
}

static int ci_hdrc_imx_suspend(struct device *dev)
{
 int ret;

 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 if (data->in_lpm)
  /* The core's suspend doesn't run */
  return 0;

 ret = imx_controller_suspend(dev, PMSG_SUSPEND);
 if (ret)
  return ret;

 pinctrl_pm_select_sleep_state(dev);

 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
  enable_irq_wake(data->wakeup_irq);

 return ret;
}

static int ci_hdrc_imx_resume(struct device *dev)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 int ret;

 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
  disable_irq_wake(data->wakeup_irq);

 pinctrl_pm_select_default_state(dev);
 ret = imx_controller_resume(dev, PMSG_RESUME);
 if (!ret && data->supports_runtime_pm) {
  pm_runtime_disable(dev);
  pm_runtime_set_active(dev);
  pm_runtime_enable(dev);
 }

 return ret;
}

static int ci_hdrc_imx_runtime_suspend(struct device *dev)
{
 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 if (data->in_lpm) {
  WARN_ON(1);
  return 0;
 }

 return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
}

static int ci_hdrc_imx_runtime_resume(struct device *dev)
{
 return imx_controller_resume(dev, PMSG_AUTO_RESUME);
}

static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, ci_hdrc_imx_runtime_resume, NULL)
};
static struct platform_driver ci_hdrc_imx_driver = {
 .probe = ci_hdrc_imx_probe,
 .remove = ci_hdrc_imx_remove,
 .shutdown = ci_hdrc_imx_shutdown,
 .driver = {
  .name = "imx_usb",
  .of_match_table = ci_hdrc_imx_dt_ids,
  .pm = pm_ptr(&ci_hdrc_imx_pm_ops),
  },
};

module_platform_driver(ci_hdrc_imx_driver);

MODULE_ALIAS("platform:imx-usb");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
MODULE_AUTHOR("Marek Vasut ");
MODULE_AUTHOR("Richard Zhao ");