Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This is mostly update of the usual drivers: qla2xxx, qedf, smartpqi,
  hpsa, lpfc, ufs, mpt3sas, ibmvfc and hisi_sas. Plus number of minor
  changes, spelling fixes and other trivia"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (298 commits)
  scsi: qla2xxx: Avoid that lockdep complains about unsafe locking in tcm_qla2xxx_close_session()
  scsi: qla2xxx: Avoid that qlt_send_resp_ctio() corrupts memory
  scsi: qla2xxx: Fix hardirq-unsafe locking
  scsi: qla2xxx: Complain loudly about reference count underflow
  scsi: qla2xxx: Use __le64 instead of uint32_t[2] for sending DMA addresses to firmware
  scsi: qla2xxx: Introduce the dsd32 and dsd64 data structures
  scsi: qla2xxx: Check the size of firmware data structures at compile time
  scsi: qla2xxx: Pass little-endian values to the firmware
  scsi: qla2xxx: Fix race conditions in the code for aborting SCSI commands
  scsi: qla2xxx: Use an on-stack completion in qla24xx_control_vp()
  scsi: qla2xxx: Make qla24xx_async_abort_cmd() static
  scsi: qla2xxx: Remove unnecessary locking from the target code
  scsi: qla2xxx: Remove qla_tgt_cmd.released
  scsi: qla2xxx: Complain if a command is released that is owned by the firmware
  scsi: qla2xxx: target: Fix offline port handling and host reset handling
  scsi: qla2xxx: Fix abort handling in tcm_qla2xxx_write_pending()
  scsi: qla2xxx: Fix error handling in qlt_alloc_qfull_cmd()
  scsi: qla2xxx: Simplify qlt_send_term_imm_notif()
  scsi: qla2xxx: Fix use-after-free issues in qla2xxx_qpair_sp_free_dma()
  scsi: qla2xxx: Fix a qla24xx_enable_msix() error path
  ...

12 files changed, 657 insertions, 249 deletions

diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
index 179bda374544..0b845ab7c3bf 100644
--- a/drivers/scsi/ufs/Kconfig
+++ b/drivers/scsi/ufs/Kconfig
@@ -109,6 +109,20 @@ config SCSI_UFS_QCOM
 	  Select this if you have UFS controller on QCOM chipset.
 	  If unsure, say N.
 
+config SCSI_UFS_MEDIATEK
+	tristate "Mediatek specific hooks to UFS controller platform driver"
+	depends on SCSI_UFSHCD_PLATFORM && ARCH_MEDIATEK
+	select PHY_MTK_UFS
+	help
+	  This selects the Mediatek specific additions to UFSHCD platform driver.
+	  UFS host on Mediatek needs some vendor specific configuration before
+	  accessing the hardware which includes PHY configuration and vendor
+	  specific registers.
+
+	  Select this if you have UFS controller on Mediatek chipset.
+
+	  If unsure, say N.
+
 config SCSI_UFS_HISI
 	tristate "Hisilicon specific hooks to UFS controller platform driver"
 	depends on (ARCH_HISI || COMPILE_TEST) && SCSI_UFSHCD_PLATFORM
diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index a3bd70c3652c..2a9097939bcb 100644
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -10,3 +10,4 @@ ufshcd-core-$(CONFIG_SCSI_UFS_BSG)	+= ufs_bsg.o
 obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o
 obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o
 obj-$(CONFIG_SCSI_UFS_HISI) += ufs-hisi.o
+obj-$(CONFIG_SCSI_UFS_MEDIATEK) += ufs-mediatek.o
diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c
index 4a37b4f57164..86dbb723f3ac 100644
--- a/drivers/scsi/ufs/cdns-pltfrm.c
+++ b/drivers/scsi/ufs/cdns-pltfrm.c
@@ -17,7 +17,8 @@
 
 #include "ufshcd-pltfrm.h"
 
-#define CDNS_UFS_REG_HCLKDIV 0xFC
+#define CDNS_UFS_REG_HCLKDIV	0xFC
+#define CDNS_UFS_REG_PHY_XCFGD1	0x113C
 
 /**
  * Sets HCLKDIV register value based on the core_clk
@@ -77,11 +78,66 @@ static int cdns_ufs_setup_clocks(struct ufs_hba *hba, bool on,
 	return cdns_ufs_set_hclkdiv(hba);
 }
 
-static struct ufs_hba_variant_ops cdns_pltfm_hba_vops = {
+/**
+ * cdns_ufs_init - performs additional ufs initialization
+ * @hba: host controller instance
+ *
+ * Returns status of initialization
+ */
+static int cdns_ufs_init(struct ufs_hba *hba)
+{
+	int status = 0;
+
+	if (hba->vops && hba->vops->phy_initialization)
+		status = hba->vops->phy_initialization(hba);
+
+	return status;
+}
+
+/**
+ * cdns_ufs_m31_16nm_phy_initialization - performs m31 phy initialization
+ * @hba: host controller instance
+ *
+ * Always returns 0
+ */
+static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba)
+{
+	u32 data;
+
+	/* Increase RX_Advanced_Min_ActivateTime_Capability */
+	data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1);
+	data |= BIT(24);
+	ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1);
+
+	return 0;
+}
+
+static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = {
+	.name = "cdns-ufs-pltfm",
+	.setup_clocks = cdns_ufs_setup_clocks,
+};
+
+static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = {
 	.name = "cdns-ufs-pltfm",
+	.init = cdns_ufs_init,
 	.setup_clocks = cdns_ufs_setup_clocks,
+	.phy_initialization = cdns_ufs_m31_16nm_phy_initialization,
+};
+
+static const struct of_device_id cdns_ufs_of_match[] = {
+	{
+		.compatible = "cdns,ufshc",
+		.data =  &cdns_ufs_pltfm_hba_vops,
+	},
+	{
+		.compatible = "cdns,ufshc-m31-16nm",
+		.data =  &cdns_ufs_m31_16nm_pltfm_hba_vops,
+	},
+	{ },
 };
 
+MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);
+
 /**
  * cdns_ufs_pltfrm_probe - probe routine of the driver
  * @pdev: pointer to platform device handle
@@ -91,10 +147,15 @@ static struct ufs_hba_variant_ops cdns_pltfm_hba_vops = {
 static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
 {
 	int err;
+	const struct of_device_id *of_id;
+	struct ufs_hba_variant_ops *vops;
 	struct device *dev = &pdev->dev;
 
+	of_id = of_match_node(cdns_ufs_of_match, dev->of_node);
+	vops = (struct ufs_hba_variant_ops *)of_id->data;
+
 	/* Perform generic probe */
-	err = ufshcd_pltfrm_init(pdev, &cdns_pltfm_hba_vops);
+	err = ufshcd_pltfrm_init(pdev, vops);
 	if (err)
 		dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
 
@@ -115,13 +176,6 @@ static int cdns_ufs_pltfrm_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id cdns_ufs_of_match[] = {
-	{ .compatible = "cdns,ufshc" },
-	{},
-};
-
-MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);
-
 static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
 	.suspend         = ufshcd_pltfrm_suspend,
 	.resume          = ufshcd_pltfrm_resume,
diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c
index 0e855b5afe82..7aed0a1a794e 100644
--- a/drivers/scsi/ufs/ufs-hisi.c
+++ b/drivers/scsi/ufs/ufs-hisi.c
@@ -293,108 +293,7 @@ static int ufs_hisi_link_startup_notify(struct ufs_hba *hba,
 	return err;
 }
 
-struct ufs_hisi_dev_params {
-	u32 pwm_rx_gear; /* pwm rx gear to work in */
-	u32 pwm_tx_gear; /* pwm tx gear to work in */
-	u32 hs_rx_gear;  /* hs rx gear to work in */
-	u32 hs_tx_gear;  /* hs tx gear to work in */
-	u32 rx_lanes;    /* number of rx lanes */
-	u32 tx_lanes;    /* number of tx lanes */
-	u32 rx_pwr_pwm;  /* rx pwm working pwr */
-	u32 tx_pwr_pwm;  /* tx pwm working pwr */
-	u32 rx_pwr_hs;   /* rx hs working pwr */
-	u32 tx_pwr_hs;   /* tx hs working pwr */
-	u32 hs_rate;     /* rate A/B to work in HS */
-	u32 desired_working_mode;
-};
-
-static int ufs_hisi_get_pwr_dev_param(
-				    struct ufs_hisi_dev_params *hisi_param,
-				    struct ufs_pa_layer_attr *dev_max,
-				    struct ufs_pa_layer_attr *agreed_pwr)
-{
-	int min_hisi_gear;
-	int min_dev_gear;
-	bool is_dev_sup_hs = false;
-	bool is_hisi_max_hs = false;
-
-	if (dev_max->pwr_rx == FASTAUTO_MODE || dev_max->pwr_rx == FAST_MODE)
-		is_dev_sup_hs = true;
-
-	if (hisi_param->desired_working_mode == FAST) {
-		is_hisi_max_hs = true;
-		min_hisi_gear = min_t(u32, hisi_param->hs_rx_gear,
-				       hisi_param->hs_tx_gear);
-	} else {
-		min_hisi_gear = min_t(u32, hisi_param->pwm_rx_gear,
-				       hisi_param->pwm_tx_gear);
-	}
-
-	/*
-	 * device doesn't support HS but
-	 * hisi_param->desired_working_mode is HS,
-	 * thus device and hisi_param don't agree
-	 */
-	if (!is_dev_sup_hs && is_hisi_max_hs) {
-		pr_err("%s: device not support HS\n", __func__);
-		return -ENOTSUPP;
-	} else if (is_dev_sup_hs && is_hisi_max_hs) {
-		/*
-		 * since device supports HS, it supports FAST_MODE.
-		 * since hisi_param->desired_working_mode is also HS
-		 * then final decision (FAST/FASTAUTO) is done according
-		 * to hisi_params as it is the restricting factor
-		 */
-		agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
-			hisi_param->rx_pwr_hs;
-	} else {
-		/*
-		 * here hisi_param->desired_working_mode is PWM.
-		 * it doesn't matter whether device supports HS or PWM,
-		 * in both cases hisi_param->desired_working_mode will
-		 * determine the mode
-		 */
-		agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
-			hisi_param->rx_pwr_pwm;
-	}
-
-	/*
-	 * we would like tx to work in the minimum number of lanes
-	 * between device capability and vendor preferences.
-	 * the same decision will be made for rx
-	 */
-	agreed_pwr->lane_tx =
-		min_t(u32, dev_max->lane_tx, hisi_param->tx_lanes);
-	agreed_pwr->lane_rx =
-		min_t(u32, dev_max->lane_rx, hisi_param->rx_lanes);
-
-	/* device maximum gear is the minimum between device rx and tx gears */
-	min_dev_gear = min_t(u32, dev_max->gear_rx, dev_max->gear_tx);
-
-	/*
-	 * if both device capabilities and vendor pre-defined preferences are
-	 * both HS or both PWM then set the minimum gear to be the chosen
-	 * working gear.
-	 * if one is PWM and one is HS then the one that is PWM get to decide
-	 * what is the gear, as it is the one that also decided previously what
-	 * pwr the device will be configured to.
-	 */
-	if ((is_dev_sup_hs && is_hisi_max_hs) ||
-	    (!is_dev_sup_hs && !is_hisi_max_hs))
-		agreed_pwr->gear_rx = agreed_pwr->gear_tx =
-			min_t(u32, min_dev_gear, min_hisi_gear);
-	else
-		agreed_pwr->gear_rx = agreed_pwr->gear_tx = min_hisi_gear;
-
-	agreed_pwr->hs_rate = hisi_param->hs_rate;
-
-	pr_info("ufs final power mode: gear = %d, lane = %d, pwr = %d, rate = %d\n",
-		agreed_pwr->gear_rx, agreed_pwr->lane_rx, agreed_pwr->pwr_rx,
-		agreed_pwr->hs_rate);
-	return 0;
-}
-
-static void ufs_hisi_set_dev_cap(struct ufs_hisi_dev_params *hisi_param)
+static void ufs_hisi_set_dev_cap(struct ufs_dev_params *hisi_param)
 {
 	hisi_param->rx_lanes = UFS_HISI_LIMIT_NUM_LANES_RX;
 	hisi_param->tx_lanes = UFS_HISI_LIMIT_NUM_LANES_TX;
@@ -477,7 +376,7 @@ static int ufs_hisi_pwr_change_notify(struct ufs_hba *hba,
 				       struct ufs_pa_layer_attr *dev_max_params,
 				       struct ufs_pa_layer_attr *dev_req_params)
 {
-	struct ufs_hisi_dev_params ufs_hisi_cap;
+	struct ufs_dev_params ufs_hisi_cap;
 	int ret = 0;
 
 	if (!dev_req_params) {
@@ -490,8 +389,8 @@ static int ufs_hisi_pwr_change_notify(struct ufs_hba *hba,
 	switch (status) {
 	case PRE_CHANGE:
 		ufs_hisi_set_dev_cap(&ufs_hisi_cap);
-		ret = ufs_hisi_get_pwr_dev_param(
-			&ufs_hisi_cap, dev_max_params, dev_req_params);
+		ret = ufshcd_get_pwr_dev_param(&ufs_hisi_cap,
+					       dev_max_params, dev_req_params);
 		if (ret) {
 			dev_err(hba->dev,
 			    "%s: failed to determine capabilities\n", __func__);
@@ -587,6 +486,10 @@ static int ufs_hisi_init_common(struct ufs_hba *hba)
 	ufshcd_set_variant(hba, host);
 
 	host->rst  = devm_reset_control_get(dev, "rst");
+	if (IS_ERR(host->rst)) {
+		dev_err(dev, "%s: failed to get reset control\n", __func__);
+		return PTR_ERR(host->rst);
+	}
 
 	ufs_hisi_set_pm_lvl(hba);
 
diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
new file mode 100644
index 000000000000..0f6ff33ce52e
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -0,0 +1,368 @@
+// 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;
+
+	/*
+	 * 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);
diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
new file mode 100644
index 000000000000..19f8c42fe06f
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-mediatek.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ */
+
+#ifndef _UFS_MEDIATEK_H
+#define _UFS_MEDIATEK_H
+
+/*
+ * Vendor specific pre-defined parameters
+ */
+#define UFS_MTK_LIMIT_NUM_LANES_RX  1
+#define UFS_MTK_LIMIT_NUM_LANES_TX  1
+#define UFS_MTK_LIMIT_HSGEAR_RX     UFS_HS_G3
+#define UFS_MTK_LIMIT_HSGEAR_TX     UFS_HS_G3
+#define UFS_MTK_LIMIT_PWMGEAR_RX    UFS_PWM_G4
+#define UFS_MTK_LIMIT_PWMGEAR_TX    UFS_PWM_G4
+#define UFS_MTK_LIMIT_RX_PWR_PWM    SLOW_MODE
+#define UFS_MTK_LIMIT_TX_PWR_PWM    SLOW_MODE
+#define UFS_MTK_LIMIT_RX_PWR_HS     FAST_MODE
+#define UFS_MTK_LIMIT_TX_PWR_HS     FAST_MODE
+#define UFS_MTK_LIMIT_HS_RATE       PA_HS_MODE_B
+#define UFS_MTK_LIMIT_DESIRED_MODE  UFS_HS_MODE
+
+/*
+ * Other attributes
+ */
+#define VS_DEBUGCLOCKENABLE         0xD0A1
+#define VS_SAVEPOWERCONTROL         0xD0A6
+#define VS_UNIPROPOWERDOWNCONTROL   0xD0A8
+
+/*
+ * VS_DEBUGCLOCKENABLE
+ */
+enum {
+	TX_SYMBOL_CLK_REQ_FORCE = 5,
+};
+
+/*
+ * VS_SAVEPOWERCONTROL
+ */
+enum {
+	RX_SYMBOL_CLK_GATE_EN   = 0,
+	SYS_CLK_GATE_EN         = 2,
+	TX_CLK_GATE_EN          = 3,
+};
+
+struct ufs_mtk_host {
+	struct ufs_hba *hba;
+	struct phy *mphy;
+};
+
+#endif /* !_UFS_MEDIATEK_H */
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index de9d3f56b58c..ea7219407309 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -580,104 +580,6 @@ static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	return 0;
 }
 
-struct ufs_qcom_dev_params {
-	u32 pwm_rx_gear;	/* pwm rx gear to work in */
-	u32 pwm_tx_gear;	/* pwm tx gear to work in */
-	u32 hs_rx_gear;		/* hs rx gear to work in */
-	u32 hs_tx_gear;		/* hs tx gear to work in */
-	u32 rx_lanes;		/* number of rx lanes */
-	u32 tx_lanes;		/* number of tx lanes */
-	u32 rx_pwr_pwm;		/* rx pwm working pwr */
-	u32 tx_pwr_pwm;		/* tx pwm working pwr */
-	u32 rx_pwr_hs;		/* rx hs working pwr */
-	u32 tx_pwr_hs;		/* tx hs working pwr */
-	u32 hs_rate;		/* rate A/B to work in HS */
-	u32 desired_working_mode;
-};
-
-static int ufs_qcom_get_pwr_dev_param(struct ufs_qcom_dev_params *qcom_param,
-				      struct ufs_pa_layer_attr *dev_max,
-				      struct ufs_pa_layer_attr *agreed_pwr)
-{
-	int min_qcom_gear;
-	int min_dev_gear;
-	bool is_dev_sup_hs = false;
-	bool is_qcom_max_hs = false;
-
-	if (dev_max->pwr_rx == FAST_MODE)
-		is_dev_sup_hs = true;
-
-	if (qcom_param->desired_working_mode == FAST) {
-		is_qcom_max_hs = true;
-		min_qcom_gear = min_t(u32, qcom_param->hs_rx_gear,
-				      qcom_param->hs_tx_gear);
-	} else {
-		min_qcom_gear = min_t(u32, qcom_param->pwm_rx_gear,
-				      qcom_param->pwm_tx_gear);
-	}
-
-	/*
-	 * device doesn't support HS but qcom_param->desired_working_mode is
-	 * HS, thus device and qcom_param don't agree
-	 */
-	if (!is_dev_sup_hs && is_qcom_max_hs) {
-		pr_err("%s: failed to agree on power mode (device doesn't support HS but requested power is HS)\n",
-			__func__);
-		return -ENOTSUPP;
-	} else if (is_dev_sup_hs && is_qcom_max_hs) {
-		/*
-		 * since device supports HS, it supports FAST_MODE.
-		 * since qcom_param->desired_working_mode is also HS
-		 * then final decision (FAST/FASTAUTO) is done according
-		 * to qcom_params as it is the restricting factor
-		 */
-		agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
-						qcom_param->rx_pwr_hs;
-	} else {
-		/*
-		 * here qcom_param->desired_working_mode is PWM.
-		 * it doesn't matter whether device supports HS or PWM,
-		 * in both cases qcom_param->desired_working_mode will
-		 * determine the mode
-		 */
-		 agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
-						qcom_param->rx_pwr_pwm;
-	}
-
-	/*
-	 * we would like tx to work in the minimum number of lanes
-	 * between device capability and vendor preferences.
-	 * the same decision will be made for rx
-	 */
-	agreed_pwr->lane_tx = min_t(u32, dev_max->lane_tx,
-						qcom_param->tx_lanes);
-	agreed_pwr->lane_rx = min_t(u32, dev_max->lane_rx,
-						qcom_param->rx_lanes);
-
-	/* device maximum gear is the minimum between device rx and tx gears */
-	min_dev_gear = min_t(u32, dev_max->gear_rx, dev_max->gear_tx);
-
-	/*
-	 * if both device capabilities and vendor pre-defined preferences are
-	 * both HS or both PWM then set the minimum gear to be the chosen
-	 * working gear.
-	 * if one is PWM and one is HS then the one that is PWM get to decide
-	 * what is the gear, as it is the one that also decided previously what
-	 * pwr the device will be configured to.
-	 */
-	if ((is_dev_sup_hs && is_qcom_max_hs) ||
-	    (!is_dev_sup_hs && !is_qcom_max_hs))
-		agreed_pwr->gear_rx = agreed_pwr->gear_tx =
-			min_t(u32, min_dev_gear, min_qcom_gear);
-	else if (!is_dev_sup_hs)
-		agreed_pwr->gear_rx = agreed_pwr->gear_tx = min_dev_gear;
-	else
-		agreed_pwr->gear_rx = agreed_pwr->gear_tx = min_qcom_gear;
-
-	agreed_pwr->hs_rate = qcom_param->hs_rate;
-	return 0;
-}
-
 #ifdef CONFIG_MSM_BUS_SCALING
 static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
 		const char *speed_mode)
@@ -905,7 +807,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
 {
 	u32 val;
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
-	struct ufs_qcom_dev_params ufs_qcom_cap;
+	struct ufs_dev_params ufs_qcom_cap;
 	int ret = 0;
 
 	if (!dev_req_params) {
@@ -944,9 +846,9 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
 				ufs_qcom_cap.hs_rx_gear = UFS_HS_G2;
 		}
 
-		ret = ufs_qcom_get_pwr_dev_param(&ufs_qcom_cap,
-						 dev_max_params,
-						 dev_req_params);
+		ret = ufshcd_get_pwr_dev_param(&ufs_qcom_cap,
+					       dev_max_params,
+					       dev_req_params);
 		if (ret) {
 			pr_err("%s: failed to determine capabilities\n",
 					__func__);
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 21e4ccb5ba6e..99a9c4d16f6b 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -516,7 +516,6 @@ struct ufs_vreg {
 	bool enabled;
 	int min_uV;
 	int max_uV;
-	int min_uA;
 	int max_uA;
 };
 
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index 27213676329c..8a74ec30c3d2 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -39,6 +39,7 @@
 
 #include "ufshcd.h"
 #include "ufshcd-pltfrm.h"
+#include "unipro.h"
 
 #define UFSHCD_DEFAULT_LANES_PER_DIRECTION		2
 
@@ -151,20 +152,12 @@ static int ufshcd_populate_vreg(struct device *dev, const char *name,
 
 	vreg->name = kstrdup(name, GFP_KERNEL);
 
-	/* if fixed regulator no need further initialization */
-	snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name);
-	if (of_property_read_bool(np, prop_name))
-		goto out;
-
 	snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
-	ret = of_property_read_u32(np, prop_name, &vreg->max_uA);
-	if (ret) {
-		dev_err(dev, "%s: unable to find %s err %d\n",
-				__func__, prop_name, ret);
-		goto out;
+	if (of_property_read_u32(np, prop_name, &vreg->max_uA)) {
+		dev_info(dev, "%s: unable to find %s\n", __func__, prop_name);
+		vreg->max_uA = 0;
 	}
 
-	vreg->min_uA = 0;
 	if (!strcmp(name, "vcc")) {
 		if (of_property_read_bool(np, "vcc-supply-1p8")) {
 			vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;
@@ -290,6 +283,103 @@ static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba)
 }
 
 /**
+ * ufshcd_get_pwr_dev_param - get finally agreed attributes for
+ *                            power mode change
+ * @pltfrm_param: pointer to platform parameters
+ * @dev_max: pointer to device attributes
+ * @agreed_pwr: returned agreed attributes
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+int ufshcd_get_pwr_dev_param(struct ufs_dev_params *pltfrm_param,
+			     struct ufs_pa_layer_attr *dev_max,
+			     struct ufs_pa_layer_attr *agreed_pwr)
+{
+	int min_pltfrm_gear;
+	int min_dev_gear;
+	bool is_dev_sup_hs = false;
+	bool is_pltfrm_max_hs = false;
+
+	if (dev_max->pwr_rx == FAST_MODE)
+		is_dev_sup_hs = true;
+
+	if (pltfrm_param->desired_working_mode == UFS_HS_MODE) {
+		is_pltfrm_max_hs = true;
+		min_pltfrm_gear = min_t(u32, pltfrm_param->hs_rx_gear,
+					pltfrm_param->hs_tx_gear);
+	} else {
+		min_pltfrm_gear = min_t(u32, pltfrm_param->pwm_rx_gear,
+					pltfrm_param->pwm_tx_gear);
+	}
+
+	/*
+	 * device doesn't support HS but
+	 * pltfrm_param->desired_working_mode is HS,
+	 * thus device and pltfrm_param don't agree
+	 */
+	if (!is_dev_sup_hs && is_pltfrm_max_hs) {
+		pr_info("%s: device doesn't support HS\n",
+			__func__);
+		return -ENOTSUPP;
+	} else if (is_dev_sup_hs && is_pltfrm_max_hs) {
+		/*
+		 * since device supports HS, it supports FAST_MODE.
+		 * since pltfrm_param->desired_working_mode is also HS
+		 * then final decision (FAST/FASTAUTO) is done according
+		 * to pltfrm_params as it is the restricting factor
+		 */
+		agreed_pwr->pwr_rx = pltfrm_param->rx_pwr_hs;
+		agreed_pwr->pwr_tx = agreed_pwr->pwr_rx;
+	} else {
+		/*
+		 * here pltfrm_param->desired_working_mode is PWM.
+		 * it doesn't matter whether device supports HS or PWM,
+		 * in both cases pltfrm_param->desired_working_mode will
+		 * determine the mode
+		 */
+		agreed_pwr->pwr_rx = pltfrm_param->rx_pwr_pwm;
+		agreed_pwr->pwr_tx = agreed_pwr->pwr_rx;
+	}
+
+	/*
+	 * we would like tx to work in the minimum number of lanes
+	 * between device capability and vendor preferences.
+	 * the same decision will be made for rx
+	 */
+	agreed_pwr->lane_tx = min_t(u32, dev_max->lane_tx,
+				    pltfrm_param->tx_lanes);
+	agreed_pwr->lane_rx = min_t(u32, dev_max->lane_rx,
+				    pltfrm_param->rx_lanes);
+
+	/* device maximum gear is the minimum between device rx and tx gears */
+	min_dev_gear = min_t(u32, dev_max->gear_rx, dev_max->gear_tx);
+
+	/*
+	 * if both device capabilities and vendor pre-defined preferences are
+	 * both HS or both PWM then set the minimum gear to be the chosen
+	 * working gear.
+	 * if one is PWM and one is HS then the one that is PWM get to decide
+	 * what is the gear, as it is the one that also decided previously what
+	 * pwr the device will be configured to.
+	 */
+	if ((is_dev_sup_hs && is_pltfrm_max_hs) ||
+	    (!is_dev_sup_hs && !is_pltfrm_max_hs)) {
+		agreed_pwr->gear_rx =
+			min_t(u32, min_dev_gear, min_pltfrm_gear);
+	} else if (!is_dev_sup_hs) {
+		agreed_pwr->gear_rx = min_dev_gear;
+	} else {
+		agreed_pwr->gear_rx = min_pltfrm_gear;
+	}
+	agreed_pwr->gear_tx = agreed_pwr->gear_rx;
+
+	agreed_pwr->hs_rate = pltfrm_param->hs_rate;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ufshcd_get_pwr_dev_param);
+
+/**
  * ufshcd_pltfrm_init - probe routine of the driver
  * @pdev: pointer to Platform device handle
  * @vops: pointer to variant ops
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.h b/drivers/scsi/ufs/ufshcd-pltfrm.h
index 1f29e1fd6d52..0919ebba182b 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.h
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.h
@@ -16,6 +16,27 @@
 
 #include "ufshcd.h"
 
+#define UFS_PWM_MODE 1
+#define UFS_HS_MODE  2
+
+struct ufs_dev_params {
+	u32 pwm_rx_gear;        /* pwm rx gear to work in */
+	u32 pwm_tx_gear;        /* pwm tx gear to work in */
+	u32 hs_rx_gear;         /* hs rx gear to work in */
+	u32 hs_tx_gear;         /* hs tx gear to work in */
+	u32 rx_lanes;           /* number of rx lanes */
+	u32 tx_lanes;           /* number of tx lanes */
+	u32 rx_pwr_pwm;         /* rx pwm working pwr */
+	u32 tx_pwr_pwm;         /* tx pwm working pwr */
+	u32 rx_pwr_hs;          /* rx hs working pwr */
+	u32 tx_pwr_hs;          /* tx hs working pwr */
+	u32 hs_rate;            /* rate A/B to work in HS */
+	u32 desired_working_mode;
+};
+
+int ufshcd_get_pwr_dev_param(struct ufs_dev_params *dev_param,
+			     struct ufs_pa_layer_attr *dev_max,
+			     struct ufs_pa_layer_attr *agreed_pwr);
 int ufshcd_pltfrm_init(struct platform_device *pdev,
 		       const struct ufs_hba_variant_ops *vops);
 void ufshcd_pltfrm_shutdown(struct platform_device *pdev);
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index e040f9dd9ff3..8c1c551f2b42 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4704,10 +4704,10 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
 				"Reject UPIU not fully implemented\n");
 			break;
 		default:
-			result = DID_ERROR << 16;
 			dev_err(hba->dev,
 				"Unexpected request response code = %x\n",
 				result);
+			result = DID_ERROR << 16;
 			break;
 		}
 		break;
@@ -6294,19 +6294,19 @@ static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba,
 		goto out;
 	}
 
-	if (hba->vreg_info.vcc)
+	if (hba->vreg_info.vcc && hba->vreg_info.vcc->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vcc->max_uA,
 				POWER_DESC_MAX_ACTV_ICC_LVLS - 1,
 				&desc_buf[PWR_DESC_ACTIVE_LVLS_VCC_0]);
 
-	if (hba->vreg_info.vccq)
+	if (hba->vreg_info.vccq && hba->vreg_info.vccq->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vccq->max_uA,
 				icc_level,
 				&desc_buf[PWR_DESC_ACTIVE_LVLS_VCCQ_0]);
 
-	if (hba->vreg_info.vccq2)
+	if (hba->vreg_info.vccq2 && hba->vreg_info.vccq2->max_uA)
 		icc_level = ufshcd_get_max_icc_level(
 				hba->vreg_info.vccq2->max_uA,
 				icc_level,
@@ -7004,6 +7004,15 @@ static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
 	if (!vreg)
 		return 0;
 
+	/*
+	 * "set_load" operation shall be required on those regulators
+	 * which specifically configured current limitation. Otherwise
+	 * zero max_uA may cause unexpected behavior when regulator is
+	 * enabled or set as high power mode.
+	 */
+	if (!vreg->max_uA)
+		return 0;
+
 	ret = regulator_set_load(vreg->reg, ua);
 	if (ret < 0) {
 		dev_err(dev, "%s: %s set load (ua=%d) failed, err=%d\n",
@@ -7039,12 +7048,15 @@ static int ufshcd_config_vreg(struct device *dev,
 	name = vreg->name;
 
 	if (regulator_count_voltages(reg) > 0) {
-		min_uV = on ? vreg->min_uV : 0;
-		ret = regulator_set_voltage(reg, min_uV, vreg->max_uV);
-		if (ret) {
-			dev_err(dev, "%s: %s set voltage failed, err=%d\n",
+		if (vreg->min_uV && vreg->max_uV) {
+			min_uV = on ? vreg->min_uV : 0;
+			ret = regulator_set_voltage(reg, min_uV, vreg->max_uV);
+			if (ret) {
+				dev_err(dev,
+					"%s: %s set voltage failed, err=%d\n",
 					__func__, name, ret);
-			goto out;
+				goto out;
+			}
 		}
 
 		uA_load = on ? vreg->max_uA : 0;
@@ -7103,9 +7115,6 @@ static int ufshcd_setup_vreg(struct ufs_hba *hba, bool on)
 	struct device *dev = hba->dev;
 	struct ufs_vreg_info *info = &hba->vreg_info;
 
-	if (!info)
-		goto out;
-
 	ret = ufshcd_toggle_vreg(dev, info->vcc, on);
 	if (ret)
 		goto out;
@@ -7131,10 +7140,7 @@ static int ufshcd_setup_hba_vreg(struct ufs_hba *hba, bool on)
 {
 	struct ufs_vreg_info *info = &hba->vreg_info;
 
-	if (info)
-		return ufshcd_toggle_vreg(hba->dev, info->vdd_hba, on);
-
-	return 0;
+	return ufshcd_toggle_vreg(hba->dev, info->vdd_hba, on);
 }
 
 static int ufshcd_get_vreg(struct device *dev, struct ufs_vreg *vreg)
@@ -7160,9 +7166,6 @@ static int ufshcd_init_vreg(struct ufs_hba *hba)
 	struct device *dev = hba->dev;
 	struct ufs_vreg_info *info = &hba->vreg_info;
 
-	if (!info)
-		goto out;
-
 	ret = ufshcd_get_vreg(dev, info->vcc);
 	if (ret)
 		goto out;
diff --git a/drivers/scsi/ufs/unipro.h b/drivers/scsi/ufs/unipro.h
index 23129d7b2678..c77e36526447 100644
--- a/drivers/scsi/ufs/unipro.h
+++ b/drivers/scsi/ufs/unipro.h
@@ -52,7 +52,7 @@
 #define RX_HS_UNTERMINATED_ENABLE		0x00A6
 #define RX_ENTER_HIBERN8			0x00A7
 #define RX_BYPASS_8B10B_ENABLE			0x00A8
-#define RX_TERMINATION_FORCE_ENABLE		0x0089
+#define RX_TERMINATION_FORCE_ENABLE		0x00A9
 #define RX_MIN_ACTIVATETIME_CAPABILITY		0x008F
 #define RX_HIBERN8TIME_CAPABILITY		0x0092
 #define RX_REFCLKFREQ				0x00EB