drivers/scsi/ufs/ufs-mediatek.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2019 MediaTek Inc.
  * Authors:
  *	Stanley Chu <stanley.chu@mediatek.com>
  *	Peter Wang <peter.wang@mediatek.com>
  */

 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>

 #include "ufshcd.h"
 #include "ufshcd-pltfrm.h"
 #include "unipro.h"
 #include "ufs-mediatek.h"

 static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
 {
 	u32 tmp;

 	if (enable) {
 		ufshcd_dme_get(hba,
 			       UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
 		tmp = tmp |
 		      (1 << RX_SYMBOL_CLK_GATE_EN) |
 		      (1 << SYS_CLK_GATE_EN) |
 		      (1 << TX_CLK_GATE_EN);
 		ufshcd_dme_set(hba,
 			       UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

 		ufshcd_dme_get(hba,
 			       UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), &tmp);
 		tmp = tmp & ~(1 << TX_SYMBOL_CLK_REQ_FORCE);
 		ufshcd_dme_set(hba,
 			       UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), tmp);
 	} else {
 		ufshcd_dme_get(hba,
 			       UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
 		tmp = tmp & ~((1 << RX_SYMBOL_CLK_GATE_EN) |
 			      (1 << SYS_CLK_GATE_EN) |
 			      (1 << TX_CLK_GATE_EN));
 		ufshcd_dme_set(hba,
 			       UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

 		ufshcd_dme_get(hba,
 			       UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), &tmp);
 		tmp = tmp | (1 << TX_SYMBOL_CLK_REQ_FORCE);
 		ufshcd_dme_set(hba,
 			       UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), tmp);
 	}
 }

 static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
 	struct device *dev = hba->dev;
 	struct device_node *np = dev->of_node;
 	int err = 0;

 	host->mphy = devm_of_phy_get_by_index(dev, np, 0);

 	if (host->mphy == ERR_PTR(-EPROBE_DEFER)) {
 		/*
 		 * UFS driver might be probed before the phy driver does.
 		 * In that case we would like to return EPROBE_DEFER code.
 		 */
 		err = -EPROBE_DEFER;
 		dev_info(dev,
 			 "%s: required phy hasn't probed yet. err = %d\n",
 			__func__, err);
 	} else if (IS_ERR(host->mphy)) {
 		err = PTR_ERR(host->mphy);
 		dev_info(dev, "%s: PHY get failed %d\n", __func__, err);
 	}

 	if (err)
 		host->mphy = NULL;

 	return err;
 }

 /**
  * ufs_mtk_setup_clocks - enables/disable clocks
  * @hba: host controller instance
  * @on: If true, enable clocks else disable them.
  * @status: PRE_CHANGE or POST_CHANGE notify
  *
  * Returns 0 on success, non-zero on failure.
  */
 static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
 				enum ufs_notify_change_status status)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
 	int ret = -EINVAL;

 	/*
 	 * In case ufs_mtk_init() is not yet done, simply ignore.
 	 * This ufs_mtk_setup_clocks() shall be called from
 	 * ufs_mtk_init() after init is done.
 	 */
 	if (!host)
 		return 0;

 	switch (status) {
 	case PRE_CHANGE:
 		if (!on)
 			ret = phy_power_off(host->mphy);
 		break;
 	case POST_CHANGE:
 		if (on)
 			ret = phy_power_on(host->mphy);
 		break;
 	}

 	return ret;
 }

 /**
  * ufs_mtk_init - find other essential mmio bases
  * @hba: host controller instance
  *
  * Binds PHY with controller and powers up PHY enabling clocks
  * and regulators.
  *
  * Returns -EPROBE_DEFER if binding fails, returns negative error
  * on phy power up failure and returns zero on success.
  */
 static int ufs_mtk_init(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host;
 	struct device *dev = hba->dev;
 	int err = 0;

 	host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
 	if (!host) {
 		err = -ENOMEM;
 		dev_info(dev, "%s: no memory for mtk ufs host\n", __func__);
 		goto out;
 	}

 	host->hba = hba;
 	ufshcd_set_variant(hba, host);

 	err = ufs_mtk_bind_mphy(hba);
 	if (err)
 		goto out_variant_clear;

 	/* Enable runtime autosuspend */
 	hba->caps |= UFSHCD_CAP_RPM_AUTOSUSPEND;

 	/*
 	 * ufshcd_vops_init() is invoked after
 	 * ufshcd_setup_clock(true) in ufshcd_hba_init() thus
 	 * phy clock setup is skipped.
 	 *
 	 * Enable phy clocks specifically here.
 	 */
 	ufs_mtk_setup_clocks(hba, true, POST_CHANGE);

 	goto out;

 out_variant_clear:
 	ufshcd_set_variant(hba, NULL);
 out:
 	return err;
 }

 static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
 				  struct ufs_pa_layer_attr *dev_max_params,
 				  struct ufs_pa_layer_attr *dev_req_params)
 {
 	struct ufs_dev_params host_cap;
 	int ret;

 	host_cap.tx_lanes = UFS_MTK_LIMIT_NUM_LANES_TX;
 	host_cap.rx_lanes = UFS_MTK_LIMIT_NUM_LANES_RX;
 	host_cap.hs_rx_gear = UFS_MTK_LIMIT_HSGEAR_RX;
 	host_cap.hs_tx_gear = UFS_MTK_LIMIT_HSGEAR_TX;
 	host_cap.pwm_rx_gear = UFS_MTK_LIMIT_PWMGEAR_RX;
 	host_cap.pwm_tx_gear = UFS_MTK_LIMIT_PWMGEAR_TX;
 	host_cap.rx_pwr_pwm = UFS_MTK_LIMIT_RX_PWR_PWM;
 	host_cap.tx_pwr_pwm = UFS_MTK_LIMIT_TX_PWR_PWM;
 	host_cap.rx_pwr_hs = UFS_MTK_LIMIT_RX_PWR_HS;
 	host_cap.tx_pwr_hs = UFS_MTK_LIMIT_TX_PWR_HS;
 	host_cap.hs_rate = UFS_MTK_LIMIT_HS_RATE;
 	host_cap.desired_working_mode =
 				UFS_MTK_LIMIT_DESIRED_MODE;

 	ret = ufshcd_get_pwr_dev_param(&host_cap,
 				       dev_max_params,
 				       dev_req_params);
 	if (ret) {
 		pr_info("%s: failed to determine capabilities\n",
 			__func__);
 	}

 	return ret;
 }

 static int ufs_mtk_pwr_change_notify(struct ufs_hba *hba,
 				     enum ufs_notify_change_status stage,
 				     struct ufs_pa_layer_attr *dev_max_params,
 				     struct ufs_pa_layer_attr *dev_req_params)
 {
 	int ret = 0;

 	switch (stage) {
 	case PRE_CHANGE:
 		ret = ufs_mtk_pre_pwr_change(hba, dev_max_params,
 					     dev_req_params);
 		break;
 	case POST_CHANGE:
 		break;
 	default:
 		ret = -EINVAL;
 		break;
 	}

 	return ret;
 }

 static int ufs_mtk_pre_link(struct ufs_hba *hba)
 {
 	int ret;
 	u32 tmp;

 	/* disable deep stall */
 	ret = ufshcd_dme_get(hba, UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
 	if (ret)
 		return ret;

 	tmp &= ~(1 << 6);

 	ret = ufshcd_dme_set(hba, UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

 	return ret;
 }

 static int ufs_mtk_post_link(struct ufs_hba *hba)
 {
 	/* disable device LCC */
 	ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);

 	/* enable unipro clock gating feature */
 	ufs_mtk_cfg_unipro_cg(hba, true);

 	return 0;
 }

 static int ufs_mtk_link_startup_notify(struct ufs_hba *hba,
 				       enum ufs_notify_change_status stage)
 {
 	int ret = 0;

 	switch (stage) {
 	case PRE_CHANGE:
 		ret = ufs_mtk_pre_link(hba);
 		break;
 	case POST_CHANGE:
 		ret = ufs_mtk_post_link(hba);
 		break;
 	default:
 		ret = -EINVAL;
 		break;
 	}

 	return ret;
 }

 static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);

 	if (ufshcd_is_link_hibern8(hba))
 		phy_power_off(host->mphy);

 	return 0;
 }

 static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);

 	if (ufshcd_is_link_hibern8(hba))
 		phy_power_on(host->mphy);

 	return 0;
 }

 /**
  * struct ufs_hba_mtk_vops - UFS MTK specific variant operations
  *
  * The variant operations configure the necessary controller and PHY
  * handshake during initialization.
  */
 static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
 	.name                = "mediatek.ufshci",
 	.init                = ufs_mtk_init,
 	.setup_clocks        = ufs_mtk_setup_clocks,
 	.link_startup_notify = ufs_mtk_link_startup_notify,
 	.pwr_change_notify   = ufs_mtk_pwr_change_notify,
 	.suspend             = ufs_mtk_suspend,
 	.resume              = ufs_mtk_resume,
 };

 /**
  * ufs_mtk_probe - probe routine of the driver
  * @pdev: pointer to Platform device handle
  *
  * Return zero for success and non-zero for failure
  */
 static int ufs_mtk_probe(struct platform_device *pdev)
 {
 	int err;
 	struct device *dev = &pdev->dev;

 	/* perform generic probe */
 	err = ufshcd_pltfrm_init(pdev, &ufs_hba_mtk_vops);
 	if (err)
 		dev_info(dev, "probe failed %d\n", err);

 	return err;
 }

 /**
  * ufs_mtk_remove - set driver_data of the device to NULL
  * @pdev: pointer to platform device handle
  *
  * Always return 0
  */
 static int ufs_mtk_remove(struct platform_device *pdev)
 {
 	struct ufs_hba *hba =  platform_get_drvdata(pdev);

 	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_remove(hba);
 	return 0;
 }

 static const struct of_device_id ufs_mtk_of_match[] = {
 	{ .compatible = "mediatek,mt8183-ufshci"},
 	{},
 };

 static const struct dev_pm_ops ufs_mtk_pm_ops = {
 	.suspend         = ufshcd_pltfrm_suspend,
 	.resume          = ufshcd_pltfrm_resume,
 	.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
 	.runtime_resume  = ufshcd_pltfrm_runtime_resume,
 	.runtime_idle    = ufshcd_pltfrm_runtime_idle,
 };

 static struct platform_driver ufs_mtk_pltform = {
 	.probe      = ufs_mtk_probe,
 	.remove     = ufs_mtk_remove,
 	.shutdown   = ufshcd_pltfrm_shutdown,
 	.driver = {
 		.name   = "ufshcd-mtk",
 		.pm     = &ufs_mtk_pm_ops,
 		.of_match_table = ufs_mtk_of_match,
 	},
 };

 MODULE_AUTHOR("Stanley Chu <stanley.chu@mediatek.com>");
 MODULE_AUTHOR("Peter Wang <peter.wang@mediatek.com>");
 MODULE_DESCRIPTION("MediaTek UFS Host Driver");
 MODULE_LICENSE("GPL v2");

 module_platform_driver(ufs_mtk_pltform);
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (C) 2019 MediaTek Inc.
	* Authors:
	* Stanley Chu <stanley.chu@mediatek.com>
	* Peter Wang <peter.wang@mediatek.com>
	*/

	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/phy/phy.h>
	#include <linux/platform_device.h>

	#include "ufshcd.h"
	#include "ufshcd-pltfrm.h"
	#include "unipro.h"
	#include "ufs-mediatek.h"

	static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
	{
	u32 tmp;

	if (enable) {
	ufshcd_dme_get(hba,
	UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
	tmp = tmp \|
	(1 << RX_SYMBOL_CLK_GATE_EN) \|
	(1 << SYS_CLK_GATE_EN) \|
	(1 << TX_CLK_GATE_EN);
	ufshcd_dme_set(hba,
	UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

	ufshcd_dme_get(hba,
	UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), &tmp);
	tmp = tmp & ~(1 << TX_SYMBOL_CLK_REQ_FORCE);
	ufshcd_dme_set(hba,
	UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), tmp);
	} else {
	ufshcd_dme_get(hba,
	UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
	tmp = tmp & ~((1 << RX_SYMBOL_CLK_GATE_EN) \|
	(1 << SYS_CLK_GATE_EN) \|
	(1 << TX_CLK_GATE_EN));
	ufshcd_dme_set(hba,
	UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

	ufshcd_dme_get(hba,
	UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), &tmp);
	tmp = tmp \| (1 << TX_SYMBOL_CLK_REQ_FORCE);
	ufshcd_dme_set(hba,
	UIC_ARG_MIB(VS_DEBUGCLOCKENABLE), tmp);
	}
	}

	static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
	{
	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
	struct device *dev = hba->dev;
	struct device_node *np = dev->of_node;
	int err = 0;

	host->mphy = devm_of_phy_get_by_index(dev, np, 0);

	if (host->mphy == ERR_PTR(-EPROBE_DEFER)) {
	/*
	* UFS driver might be probed before the phy driver does.
	* In that case we would like to return EPROBE_DEFER code.
	*/
	err = -EPROBE_DEFER;
	dev_info(dev,
	"%s: required phy hasn't probed yet. err = %d\n",
	__func__, err);
	} else if (IS_ERR(host->mphy)) {
	err = PTR_ERR(host->mphy);
	dev_info(dev, "%s: PHY get failed %d\n", __func__, err);
	}

	if (err)
	host->mphy = NULL;

	return err;
	}

	/**
	* ufs_mtk_setup_clocks - enables/disable clocks
	* @hba: host controller instance
	* @on: If true, enable clocks else disable them.
	* @status: PRE_CHANGE or POST_CHANGE notify
	*
	* Returns 0 on success, non-zero on failure.
	*/
	static int ufs_mtk_setup_clocks(struct ufs_hba *hba, bool on,
	enum ufs_notify_change_status status)
	{
	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
	int ret = -EINVAL;

	/*
	* In case ufs_mtk_init() is not yet done, simply ignore.
	* This ufs_mtk_setup_clocks() shall be called from
	* ufs_mtk_init() after init is done.
	*/
	if (!host)
	return 0;

	switch (status) {
	case PRE_CHANGE:
	if (!on)
	ret = phy_power_off(host->mphy);
	break;
	case POST_CHANGE:
	if (on)
	ret = phy_power_on(host->mphy);
	break;
	}

	return ret;
	}

	/**
	* ufs_mtk_init - find other essential mmio bases
	* @hba: host controller instance
	*
	* Binds PHY with controller and powers up PHY enabling clocks
	* and regulators.
	*
	* Returns -EPROBE_DEFER if binding fails, returns negative error
	* on phy power up failure and returns zero on success.
	*/
	static int ufs_mtk_init(struct ufs_hba *hba)
	{
	struct ufs_mtk_host *host;
	struct device *dev = hba->dev;
	int err = 0;

	host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
	if (!host) {
	err = -ENOMEM;
	dev_info(dev, "%s: no memory for mtk ufs host\n", __func__);
	goto out;
	}

	host->hba = hba;
	ufshcd_set_variant(hba, host);

	err = ufs_mtk_bind_mphy(hba);
	if (err)
	goto out_variant_clear;

	/* Enable runtime autosuspend */
	hba->caps \|= UFSHCD_CAP_RPM_AUTOSUSPEND;

	/*
	* ufshcd_vops_init() is invoked after
	* ufshcd_setup_clock(true) in ufshcd_hba_init() thus
	* phy clock setup is skipped.
	*
	* Enable phy clocks specifically here.
	*/
	ufs_mtk_setup_clocks(hba, true, POST_CHANGE);

	goto out;

	out_variant_clear:
	ufshcd_set_variant(hba, NULL);
	out:
	return err;
	}

	static int ufs_mtk_pre_pwr_change(struct ufs_hba *hba,
	struct ufs_pa_layer_attr *dev_max_params,
	struct ufs_pa_layer_attr *dev_req_params)
	{
	struct ufs_dev_params host_cap;
	int ret;

	host_cap.tx_lanes = UFS_MTK_LIMIT_NUM_LANES_TX;
	host_cap.rx_lanes = UFS_MTK_LIMIT_NUM_LANES_RX;
	host_cap.hs_rx_gear = UFS_MTK_LIMIT_HSGEAR_RX;
	host_cap.hs_tx_gear = UFS_MTK_LIMIT_HSGEAR_TX;
	host_cap.pwm_rx_gear = UFS_MTK_LIMIT_PWMGEAR_RX;
	host_cap.pwm_tx_gear = UFS_MTK_LIMIT_PWMGEAR_TX;
	host_cap.rx_pwr_pwm = UFS_MTK_LIMIT_RX_PWR_PWM;
	host_cap.tx_pwr_pwm = UFS_MTK_LIMIT_TX_PWR_PWM;
	host_cap.rx_pwr_hs = UFS_MTK_LIMIT_RX_PWR_HS;
	host_cap.tx_pwr_hs = UFS_MTK_LIMIT_TX_PWR_HS;
	host_cap.hs_rate = UFS_MTK_LIMIT_HS_RATE;
	host_cap.desired_working_mode =
	UFS_MTK_LIMIT_DESIRED_MODE;

	ret = ufshcd_get_pwr_dev_param(&host_cap,
	dev_max_params,
	dev_req_params);
	if (ret) {
	pr_info("%s: failed to determine capabilities\n",
	__func__);
	}

	return ret;
	}

	static int ufs_mtk_pwr_change_notify(struct ufs_hba *hba,
	enum ufs_notify_change_status stage,
	struct ufs_pa_layer_attr *dev_max_params,
	struct ufs_pa_layer_attr *dev_req_params)
	{
	int ret = 0;

	switch (stage) {
	case PRE_CHANGE:
	ret = ufs_mtk_pre_pwr_change(hba, dev_max_params,
	dev_req_params);
	break;
	case POST_CHANGE:
	break;
	default:
	ret = -EINVAL;
	break;
	}

	return ret;
	}

	static int ufs_mtk_pre_link(struct ufs_hba *hba)
	{
	int ret;
	u32 tmp;

	/* disable deep stall */
	ret = ufshcd_dme_get(hba, UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp);
	if (ret)
	return ret;

	tmp &= ~(1 << 6);

	ret = ufshcd_dme_set(hba, UIC_ARG_MIB(VS_SAVEPOWERCONTROL), tmp);

	return ret;
	}

	static int ufs_mtk_post_link(struct ufs_hba *hba)
	{
	/* disable device LCC */
	ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);

	/* enable unipro clock gating feature */
	ufs_mtk_cfg_unipro_cg(hba, true);

	return 0;
	}

	static int ufs_mtk_link_startup_notify(struct ufs_hba *hba,
	enum ufs_notify_change_status stage)
	{
	int ret = 0;

	switch (stage) {
	case PRE_CHANGE:
	ret = ufs_mtk_pre_link(hba);
	break;
	case POST_CHANGE:
	ret = ufs_mtk_post_link(hba);
	break;
	default:
	ret = -EINVAL;
	break;
	}

	return ret;
	}

	static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
	{
	struct ufs_mtk_host *host = ufshcd_get_variant(hba);

	if (ufshcd_is_link_hibern8(hba))
	phy_power_off(host->mphy);

	return 0;
	}

	static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
	{
	struct ufs_mtk_host *host = ufshcd_get_variant(hba);

	if (ufshcd_is_link_hibern8(hba))
	phy_power_on(host->mphy);

	return 0;
	}

	/**
	* struct ufs_hba_mtk_vops - UFS MTK specific variant operations
	*
	* The variant operations configure the necessary controller and PHY
	* handshake during initialization.
	*/
	static struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
	.name = "mediatek.ufshci",
	.init = ufs_mtk_init,
	.setup_clocks = ufs_mtk_setup_clocks,
	.link_startup_notify = ufs_mtk_link_startup_notify,
	.pwr_change_notify = ufs_mtk_pwr_change_notify,
	.suspend = ufs_mtk_suspend,
	.resume = ufs_mtk_resume,
	};

	/**
	* ufs_mtk_probe - probe routine of the driver
	* @pdev: pointer to Platform device handle
	*
	* Return zero for success and non-zero for failure
	*/
	static int ufs_mtk_probe(struct platform_device *pdev)
	{
	int err;
	struct device *dev = &pdev->dev;

	/* perform generic probe */
	err = ufshcd_pltfrm_init(pdev, &ufs_hba_mtk_vops);
	if (err)
	dev_info(dev, "probe failed %d\n", err);

	return err;
	}

	/**
	* ufs_mtk_remove - set driver_data of the device to NULL
	* @pdev: pointer to platform device handle
	*
	* Always return 0
	*/
	static int ufs_mtk_remove(struct platform_device *pdev)
	{
	struct ufs_hba *hba = platform_get_drvdata(pdev);

	pm_runtime_get_sync(&(pdev)->dev);
	ufshcd_remove(hba);
	return 0;
	}

	static const struct of_device_id ufs_mtk_of_match[] = {
	{ .compatible = "mediatek,mt8183-ufshci"},
	{},
	};

	static const struct dev_pm_ops ufs_mtk_pm_ops = {
	.suspend = ufshcd_pltfrm_suspend,
	.resume = ufshcd_pltfrm_resume,
	.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
	.runtime_resume = ufshcd_pltfrm_runtime_resume,
	.runtime_idle = ufshcd_pltfrm_runtime_idle,
	};

	static struct platform_driver ufs_mtk_pltform = {
	.probe = ufs_mtk_probe,
	.remove = ufs_mtk_remove,
	.shutdown = ufshcd_pltfrm_shutdown,
	.driver = {
	.name = "ufshcd-mtk",
	.pm = &ufs_mtk_pm_ops,
	.of_match_table = ufs_mtk_of_match,
	},
	};

	MODULE_AUTHOR("Stanley Chu <stanley.chu@mediatek.com>");
	MODULE_AUTHOR("Peter Wang <peter.wang@mediatek.com>");
	MODULE_DESCRIPTION("MediaTek UFS Host Driver");
	MODULE_LICENSE("GPL v2");

	module_platform_driver(ufs_mtk_pltform);