Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

3 files changed, 1134 insertions, 0 deletions

diff --git a/drivers/phy/xilinx/Kconfig b/drivers/phy/xilinx/Kconfig
new file mode 100644
index 000000000..d8b0d46b2
--- /dev/null
+++ b/drivers/phy/xilinx/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+#
+# PHY drivers for Xilinx platforms
+#
+
+config PHY_XILINX_ZYNQMP
+	tristate "Xilinx ZynqMP PHY driver"
+	depends on ARCH_ZYNQMP || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Enable this to support ZynqMP High Speed Gigabit Transceiver
+	  that is part of ZynqMP SoC.
diff --git a/drivers/phy/xilinx/Makefile b/drivers/phy/xilinx/Makefile
new file mode 100644
index 000000000..3f1f6a2a9
--- /dev/null
+++ b/drivers/phy/xilinx/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_PHY_XILINX_ZYNQMP)		+= phy-zynqmp.o
diff --git a/drivers/phy/xilinx/phy-zynqmp.c b/drivers/phy/xilinx/phy-zynqmp.c
new file mode 100644
index 000000000..240626b55
--- /dev/null
+++ b/drivers/phy/xilinx/phy-zynqmp.c
@@ -0,0 +1,1118 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * phy-zynqmp.c - PHY driver for Xilinx ZynqMP GT.
+ *
+ * Copyright (C) 2018-2020 Xilinx Inc.
+ *
+ * Author: Anurag Kumar Vulisha <anuragku@xilinx.com>
+ * Author: Subbaraya Sundeep <sundeep.lkml@gmail.com>
+ * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This driver is tested for USB, SGMII, SATA and Display Port currently.
+ * PCIe should also work but that is experimental as of now.
+ */
+
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/phy/phy.h>
+
+/*
+ * Lane Registers
+ */
+
+/* TX De-emphasis parameters */
+#define L0_TX_ANA_TM_18			0x0048
+#define L0_TX_ANA_TM_118		0x01d8
+#define L0_TX_ANA_TM_118_FORCE_17_0	BIT(0)
+
+/* DN Resistor calibration code parameters */
+#define L0_TXPMA_ST_3			0x0b0c
+#define L0_DN_CALIB_CODE		0x3f
+
+/* PMA control parameters */
+#define L0_TXPMD_TM_45			0x0cb4
+#define L0_TXPMD_TM_48			0x0cc0
+#define L0_TXPMD_TM_45_OVER_DP_MAIN	BIT(0)
+#define L0_TXPMD_TM_45_ENABLE_DP_MAIN	BIT(1)
+#define L0_TXPMD_TM_45_OVER_DP_POST1	BIT(2)
+#define L0_TXPMD_TM_45_ENABLE_DP_POST1	BIT(3)
+#define L0_TXPMD_TM_45_OVER_DP_POST2	BIT(4)
+#define L0_TXPMD_TM_45_ENABLE_DP_POST2	BIT(5)
+
+/* PCS control parameters */
+#define L0_TM_DIG_6			0x106c
+#define L0_TM_DIS_DESCRAMBLE_DECODER	0x0f
+#define L0_TX_DIG_61			0x00f4
+#define L0_TM_DISABLE_SCRAMBLE_ENCODER	(BIT(3) | GENMASK(1, 0))
+
+/* PLL Test Mode register parameters */
+#define L0_TM_PLL_DIG_37		0x2094
+#define L0_TM_COARSE_CODE_LIMIT		0x10
+
+/* PLL SSC step size offsets */
+#define L0_PLL_SS_STEPS_0_LSB		0x2368
+#define L0_PLL_SS_STEPS_1_MSB		0x236c
+#define L0_PLL_SS_STEP_SIZE_0_LSB	0x2370
+#define L0_PLL_SS_STEP_SIZE_1		0x2374
+#define L0_PLL_SS_STEP_SIZE_2		0x2378
+#define L0_PLL_SS_STEP_SIZE_3_MSB	0x237c
+#define L0_PLL_STATUS_READ_1		0x23e4
+
+/* SSC step size parameters */
+#define STEP_SIZE_0_MASK		0xff
+#define STEP_SIZE_1_MASK		0xff
+#define STEP_SIZE_2_MASK		0xff
+#define STEP_SIZE_3_MASK		0x3
+#define STEP_SIZE_SHIFT			8
+#define FORCE_STEP_SIZE			0x10
+#define FORCE_STEPS			0x20
+#define STEPS_0_MASK			0xff
+#define STEPS_1_MASK			0x07
+
+/* Reference clock selection parameters */
+#define L0_Ln_REF_CLK_SEL(n)		(0x2860 + (n) * 4)
+#define L0_REF_CLK_LCL_SEL		BIT(7)
+#define L0_REF_CLK_SEL_MASK		0x9f
+
+/* Calibration digital logic parameters */
+#define L3_TM_CALIB_DIG19		0xec4c
+#define L3_CALIB_DONE_STATUS		0xef14
+#define L3_TM_CALIB_DIG18		0xec48
+#define L3_TM_CALIB_DIG19_NSW		0x07
+#define L3_TM_CALIB_DIG18_NSW		0xe0
+#define L3_TM_OVERRIDE_NSW_CODE         0x20
+#define L3_CALIB_DONE			0x02
+#define L3_NSW_SHIFT			5
+#define L3_NSW_PIPE_SHIFT		4
+#define L3_NSW_CALIB_SHIFT		3
+
+#define PHY_REG_OFFSET			0x4000
+
+/*
+ * Global Registers
+ */
+
+/* Refclk selection parameters */
+#define PLL_REF_SEL(n)			(0x10000 + (n) * 4)
+#define PLL_FREQ_MASK			0x1f
+#define PLL_STATUS_LOCKED		0x10
+
+/* Inter Connect Matrix parameters */
+#define ICM_CFG0			0x10010
+#define ICM_CFG1			0x10014
+#define ICM_CFG0_L0_MASK		0x07
+#define ICM_CFG0_L1_MASK		0x70
+#define ICM_CFG1_L2_MASK		0x07
+#define ICM_CFG2_L3_MASK		0x70
+#define ICM_CFG_SHIFT			4
+
+/* Inter Connect Matrix allowed protocols */
+#define ICM_PROTOCOL_PD			0x0
+#define ICM_PROTOCOL_PCIE		0x1
+#define ICM_PROTOCOL_SATA		0x2
+#define ICM_PROTOCOL_USB		0x3
+#define ICM_PROTOCOL_DP			0x4
+#define ICM_PROTOCOL_SGMII		0x5
+
+static const char *const xpsgtr_icm_str[] = {
+	[ICM_PROTOCOL_PD] = "none",
+	[ICM_PROTOCOL_PCIE] = "PCIe",
+	[ICM_PROTOCOL_SATA] = "SATA",
+	[ICM_PROTOCOL_USB] = "USB",
+	[ICM_PROTOCOL_DP] = "DisplayPort",
+	[ICM_PROTOCOL_SGMII] = "SGMII",
+};
+
+/* Test Mode common reset control  parameters */
+#define TM_CMN_RST			0x10018
+#define TM_CMN_RST_EN			0x1
+#define TM_CMN_RST_SET			0x2
+#define TM_CMN_RST_MASK			0x3
+
+/* Bus width parameters */
+#define TX_PROT_BUS_WIDTH		0x10040
+#define RX_PROT_BUS_WIDTH		0x10044
+#define PROT_BUS_WIDTH_10		0x0
+#define PROT_BUS_WIDTH_20		0x1
+#define PROT_BUS_WIDTH_40		0x2
+#define PROT_BUS_WIDTH_SHIFT(n)		((n) * 2)
+#define PROT_BUS_WIDTH_MASK(n)		GENMASK((n) * 2 + 1, (n) * 2)
+
+/* Number of GT lanes */
+#define NUM_LANES			4
+
+/* SIOU SATA control register */
+#define SATA_CONTROL_OFFSET		0x0100
+
+/* Total number of controllers */
+#define CONTROLLERS_PER_LANE		5
+
+/* Timeout values */
+#define TIMEOUT_US			1000
+
+/* Lane 0/1/2/3 offset */
+#define DIG_8(n)		((0x4000 * (n)) + 0x1074)
+#define ILL13(n)		((0x4000 * (n)) + 0x1994)
+#define DIG_10(n)		((0x4000 * (n)) + 0x107c)
+#define RST_DLY(n)		((0x4000 * (n)) + 0x19a4)
+#define BYP_15(n)		((0x4000 * (n)) + 0x1038)
+#define BYP_12(n)		((0x4000 * (n)) + 0x102c)
+#define MISC3(n)		((0x4000 * (n)) + 0x19ac)
+#define EQ11(n)			((0x4000 * (n)) + 0x1978)
+
+static u32 save_reg_address[] = {
+	/* Lane 0/1/2/3 Register */
+	DIG_8(0), ILL13(0), DIG_10(0), RST_DLY(0), BYP_15(0), BYP_12(0), MISC3(0), EQ11(0),
+	DIG_8(1), ILL13(1), DIG_10(1), RST_DLY(1), BYP_15(1), BYP_12(1), MISC3(1), EQ11(1),
+	DIG_8(2), ILL13(2), DIG_10(2), RST_DLY(2), BYP_15(2), BYP_12(2), MISC3(2), EQ11(2),
+	DIG_8(3), ILL13(3), DIG_10(3), RST_DLY(3), BYP_15(3), BYP_12(3), MISC3(3), EQ11(3),
+};
+
+struct xpsgtr_dev;
+
+/**
+ * struct xpsgtr_ssc - structure to hold SSC settings for a lane
+ * @refclk_rate: PLL reference clock frequency
+ * @pll_ref_clk: value to be written to register for corresponding ref clk rate
+ * @steps: number of steps of SSC (Spread Spectrum Clock)
+ * @step_size: step size of each step
+ */
+struct xpsgtr_ssc {
+	u32 refclk_rate;
+	u8  pll_ref_clk;
+	u32 steps;
+	u32 step_size;
+};
+
+/**
+ * struct xpsgtr_phy - representation of a lane
+ * @phy: pointer to the kernel PHY device
+ * @instance: instance of the protocol type (such as the lane within a
+ *            protocol, or the USB/Ethernet controller)
+ * @lane: lane number
+ * @protocol: protocol in which the lane operates
+ * @skip_phy_init: skip phy_init() if true
+ * @dev: pointer to the xpsgtr_dev instance
+ * @refclk: reference clock index
+ */
+struct xpsgtr_phy {
+	struct phy *phy;
+	u8 instance;
+	u8 lane;
+	u8 protocol;
+	bool skip_phy_init;
+	struct xpsgtr_dev *dev;
+	unsigned int refclk;
+};
+
+/**
+ * struct xpsgtr_dev - representation of a ZynMP GT device
+ * @dev: pointer to device
+ * @serdes: serdes base address
+ * @siou: siou base address
+ * @gtr_mutex: mutex for locking
+ * @phys: PHY lanes
+ * @clk: reference clocks
+ * @tx_term_fix: fix for GT issue
+ * @saved_icm_cfg0: stored value of ICM CFG0 register
+ * @saved_icm_cfg1: stored value of ICM CFG1 register
+ * @saved_regs: registers to be saved/restored during suspend/resume
+ */
+struct xpsgtr_dev {
+	struct device *dev;
+	void __iomem *serdes;
+	void __iomem *siou;
+	struct mutex gtr_mutex; /* mutex for locking */
+	struct xpsgtr_phy phys[NUM_LANES];
+	struct clk *clk[NUM_LANES];
+	bool tx_term_fix;
+	unsigned int saved_icm_cfg0;
+	unsigned int saved_icm_cfg1;
+	u32 *saved_regs;
+};
+
+/*
+ * Configuration Data
+ */
+
+/* lookup table to hold all settings needed for a ref clock frequency */
+static const struct xpsgtr_ssc ssc_lookup[] = {
+	{  19200000, 0x05,  608, 264020 },
+	{  20000000, 0x06,  634, 243454 },
+	{  24000000, 0x07,  760, 168973 },
+	{  26000000, 0x08,  824, 143860 },
+	{  27000000, 0x09,  856,  86551 },
+	{  38400000, 0x0a, 1218,  65896 },
+	{  40000000, 0x0b,  634, 243454 },
+	{  52000000, 0x0c,  824, 143860 },
+	{ 100000000, 0x0d, 1058,  87533 },
+	{ 108000000, 0x0e,  856,  86551 },
+	{ 125000000, 0x0f,  992, 119497 },
+	{ 135000000, 0x10, 1070,  55393 },
+	{ 150000000, 0x11,  792, 187091 }
+};
+
+/*
+ * I/O Accessors
+ */
+
+static inline u32 xpsgtr_read(struct xpsgtr_dev *gtr_dev, u32 reg)
+{
+	return readl(gtr_dev->serdes + reg);
+}
+
+static inline void xpsgtr_write(struct xpsgtr_dev *gtr_dev, u32 reg, u32 value)
+{
+	writel(value, gtr_dev->serdes + reg);
+}
+
+static inline void xpsgtr_clr_set(struct xpsgtr_dev *gtr_dev, u32 reg,
+				  u32 clr, u32 set)
+{
+	u32 value = xpsgtr_read(gtr_dev, reg);
+
+	value &= ~clr;
+	value |= set;
+	xpsgtr_write(gtr_dev, reg, value);
+}
+
+static inline u32 xpsgtr_read_phy(struct xpsgtr_phy *gtr_phy, u32 reg)
+{
+	void __iomem *addr = gtr_phy->dev->serdes
+			   + gtr_phy->lane * PHY_REG_OFFSET + reg;
+
+	return readl(addr);
+}
+
+static inline void xpsgtr_write_phy(struct xpsgtr_phy *gtr_phy,
+				    u32 reg, u32 value)
+{
+	void __iomem *addr = gtr_phy->dev->serdes
+			   + gtr_phy->lane * PHY_REG_OFFSET + reg;
+
+	writel(value, addr);
+}
+
+static inline void xpsgtr_clr_set_phy(struct xpsgtr_phy *gtr_phy,
+				      u32 reg, u32 clr, u32 set)
+{
+	void __iomem *addr = gtr_phy->dev->serdes
+			   + gtr_phy->lane * PHY_REG_OFFSET + reg;
+
+	writel((readl(addr) & ~clr) | set, addr);
+}
+
+/**
+ * xpsgtr_save_lane_regs - Saves registers on suspend
+ * @gtr_dev: pointer to phy controller context structure
+ */
+static void xpsgtr_save_lane_regs(struct xpsgtr_dev *gtr_dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_reg_address); i++)
+		gtr_dev->saved_regs[i] = xpsgtr_read(gtr_dev,
+						     save_reg_address[i]);
+}
+
+/**
+ * xpsgtr_restore_lane_regs - Restores registers on resume
+ * @gtr_dev: pointer to phy controller context structure
+ */
+static void xpsgtr_restore_lane_regs(struct xpsgtr_dev *gtr_dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_reg_address); i++)
+		xpsgtr_write(gtr_dev, save_reg_address[i],
+			     gtr_dev->saved_regs[i]);
+}
+
+/*
+ * Hardware Configuration
+ */
+
+/* Wait for the PLL to lock (with a timeout). */
+static int xpsgtr_wait_pll_lock(struct phy *phy)
+{
+	struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+	unsigned int timeout = TIMEOUT_US;
+	u8 protocol = gtr_phy->protocol;
+	int ret;
+
+	dev_dbg(gtr_dev->dev, "Waiting for PLL lock\n");
+
+	/*
+	 * For DP and PCIe, only the instance 0 PLL is used. Switch to that phy
+	 * so we wait on the right PLL.
+	 */
+	if ((protocol == ICM_PROTOCOL_DP || protocol == ICM_PROTOCOL_PCIE) &&
+	    gtr_phy->instance) {
+		int i;
+
+		for (i = 0; i < NUM_LANES; i++) {
+			gtr_phy = &gtr_dev->phys[i];
+
+			if (gtr_phy->protocol == protocol && !gtr_phy->instance)
+				goto got_phy;
+		}
+
+		return -EBUSY;
+	}
+
+got_phy:
+	while (1) {
+		u32 reg = xpsgtr_read_phy(gtr_phy, L0_PLL_STATUS_READ_1);
+
+		if ((reg & PLL_STATUS_LOCKED) == PLL_STATUS_LOCKED) {
+			ret = 0;
+			break;
+		}
+
+		if (--timeout == 0) {
+			ret = -ETIMEDOUT;
+			break;
+		}
+
+		udelay(1);
+	}
+
+	if (ret == -ETIMEDOUT)
+		dev_err(gtr_dev->dev,
+			"lane %u (protocol %u, instance %u): PLL lock timeout\n",
+			gtr_phy->lane, gtr_phy->protocol, gtr_phy->instance);
+
+	return ret;
+}
+
+/* Get the spread spectrum (SSC) settings for the reference clock rate */
+static const struct xpsgtr_ssc *xpsgtr_find_sscs(struct xpsgtr_phy *gtr_phy)
+{
+	unsigned long rate;
+	struct clk *clk;
+	unsigned int i;
+
+	clk = gtr_phy->dev->clk[gtr_phy->refclk];
+	rate = clk_get_rate(clk);
+
+	for (i = 0 ; i < ARRAY_SIZE(ssc_lookup); i++) {
+		/* Allow an error of 100 ppm */
+		unsigned long error = ssc_lookup[i].refclk_rate / 10000;
+
+		if (abs(rate - ssc_lookup[i].refclk_rate) < error)
+			return &ssc_lookup[i];
+	}
+
+	dev_err(gtr_phy->dev->dev, "Invalid rate %lu for reference clock %u\n",
+		rate, gtr_phy->refclk);
+
+	return NULL;
+}
+
+/* Configure PLL and spread-sprectrum clock. */
+static int xpsgtr_configure_pll(struct xpsgtr_phy *gtr_phy)
+{
+	const struct xpsgtr_ssc *ssc;
+	u32 step_size;
+
+	ssc = xpsgtr_find_sscs(gtr_phy);
+	if (!ssc)
+		return -EINVAL;
+
+	step_size = ssc->step_size;
+
+	xpsgtr_clr_set(gtr_phy->dev, PLL_REF_SEL(gtr_phy->lane),
+		       PLL_FREQ_MASK, ssc->pll_ref_clk);
+
+	/* Enable lane clock sharing, if required */
+	if (gtr_phy->refclk == gtr_phy->lane)
+		xpsgtr_clr_set(gtr_phy->dev, L0_Ln_REF_CLK_SEL(gtr_phy->lane),
+			       L0_REF_CLK_SEL_MASK, L0_REF_CLK_LCL_SEL);
+	else
+		xpsgtr_clr_set(gtr_phy->dev, L0_Ln_REF_CLK_SEL(gtr_phy->lane),
+			       L0_REF_CLK_SEL_MASK, 1 << gtr_phy->refclk);
+
+	/* SSC step size [7:0] */
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEP_SIZE_0_LSB,
+			   STEP_SIZE_0_MASK, step_size & STEP_SIZE_0_MASK);
+
+	/* SSC step size [15:8] */
+	step_size >>= STEP_SIZE_SHIFT;
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEP_SIZE_1,
+			   STEP_SIZE_1_MASK, step_size & STEP_SIZE_1_MASK);
+
+	/* SSC step size [23:16] */
+	step_size >>= STEP_SIZE_SHIFT;
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEP_SIZE_2,
+			   STEP_SIZE_2_MASK, step_size & STEP_SIZE_2_MASK);
+
+	/* SSC steps [7:0] */
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEPS_0_LSB,
+			   STEPS_0_MASK, ssc->steps & STEPS_0_MASK);
+
+	/* SSC steps [10:8] */
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEPS_1_MSB,
+			   STEPS_1_MASK,
+			   (ssc->steps >> STEP_SIZE_SHIFT) & STEPS_1_MASK);
+
+	/* SSC step size [24:25] */
+	step_size >>= STEP_SIZE_SHIFT;
+	xpsgtr_clr_set_phy(gtr_phy, L0_PLL_SS_STEP_SIZE_3_MSB,
+			   STEP_SIZE_3_MASK, (step_size & STEP_SIZE_3_MASK) |
+			   FORCE_STEP_SIZE | FORCE_STEPS);
+
+	return 0;
+}
+
+/* Configure the lane protocol. */
+static void xpsgtr_lane_set_protocol(struct xpsgtr_phy *gtr_phy)
+{
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+	u8 protocol = gtr_phy->protocol;
+
+	switch (gtr_phy->lane) {
+	case 0:
+		xpsgtr_clr_set(gtr_dev, ICM_CFG0, ICM_CFG0_L0_MASK, protocol);
+		break;
+	case 1:
+		xpsgtr_clr_set(gtr_dev, ICM_CFG0, ICM_CFG0_L1_MASK,
+			       protocol << ICM_CFG_SHIFT);
+		break;
+	case 2:
+		xpsgtr_clr_set(gtr_dev, ICM_CFG1, ICM_CFG0_L0_MASK, protocol);
+		break;
+	case 3:
+		xpsgtr_clr_set(gtr_dev, ICM_CFG1, ICM_CFG0_L1_MASK,
+			       protocol << ICM_CFG_SHIFT);
+		break;
+	default:
+		/* We already checked 0 <= lane <= 3 */
+		break;
+	}
+}
+
+/**
+ * xpsgtr_bypass_scrambler_8b10b - Configure scrambler/encoder behavior
+ * @gtr_phy: pointer to lane context
+ * @bypass: true to enable scrambler/encoder bypass (SATA/SGMII),
+ *          false to disable scrambler/encoder bypass (USB3)
+ *
+ * Uses RMW to preserve reserved and unrelated register fields.
+ */
+static void xpsgtr_bypass_scrambler_8b10b(struct xpsgtr_phy *gtr_phy,
+					  bool bypass)
+{
+	if (bypass) {
+		xpsgtr_clr_set_phy(gtr_phy, L0_TM_DIG_6,
+				   L0_TM_DIS_DESCRAMBLE_DECODER,
+				   L0_TM_DIS_DESCRAMBLE_DECODER);
+		xpsgtr_clr_set_phy(gtr_phy, L0_TX_DIG_61,
+				   L0_TM_DISABLE_SCRAMBLE_ENCODER,
+				   L0_TM_DISABLE_SCRAMBLE_ENCODER);
+	} else {
+		xpsgtr_clr_set_phy(gtr_phy, L0_TM_DIG_6,
+				   L0_TM_DIS_DESCRAMBLE_DECODER, 0);
+		xpsgtr_clr_set_phy(gtr_phy, L0_TX_DIG_61,
+				   L0_TM_DISABLE_SCRAMBLE_ENCODER, 0);
+	}
+}
+
+/* DP-specific initialization. */
+static void xpsgtr_phy_init_dp(struct xpsgtr_phy *gtr_phy)
+{
+	xpsgtr_write_phy(gtr_phy, L0_TXPMD_TM_45,
+			 L0_TXPMD_TM_45_OVER_DP_MAIN |
+			 L0_TXPMD_TM_45_ENABLE_DP_MAIN |
+			 L0_TXPMD_TM_45_OVER_DP_POST1 |
+			 L0_TXPMD_TM_45_OVER_DP_POST2 |
+			 L0_TXPMD_TM_45_ENABLE_DP_POST2);
+	xpsgtr_write_phy(gtr_phy, L0_TX_ANA_TM_118,
+			 L0_TX_ANA_TM_118_FORCE_17_0);
+}
+
+/* SATA-specific initialization. */
+static void xpsgtr_phy_init_sata(struct xpsgtr_phy *gtr_phy)
+{
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+
+	xpsgtr_bypass_scrambler_8b10b(gtr_phy, true);
+
+	writel(gtr_phy->lane, gtr_dev->siou + SATA_CONTROL_OFFSET);
+}
+
+/* SGMII-specific initialization. */
+static void xpsgtr_phy_init_sgmii(struct xpsgtr_phy *gtr_phy)
+{
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+	u32 mask = PROT_BUS_WIDTH_MASK(gtr_phy->lane);
+	u32 val = PROT_BUS_WIDTH_10 << PROT_BUS_WIDTH_SHIFT(gtr_phy->lane);
+
+	/* Set SGMII protocol TX and RX bus width to 10 bits. */
+	xpsgtr_clr_set(gtr_dev, TX_PROT_BUS_WIDTH, mask, val);
+	xpsgtr_clr_set(gtr_dev, RX_PROT_BUS_WIDTH, mask, val);
+
+	xpsgtr_bypass_scrambler_8b10b(gtr_phy, true);
+}
+
+/* Configure TX de-emphasis and margining for DP. */
+static void xpsgtr_phy_configure_dp(struct xpsgtr_phy *gtr_phy, unsigned int pre,
+				    unsigned int voltage)
+{
+	static const u8 voltage_swing[4][4] = {
+		{ 0x2a, 0x27, 0x24, 0x20 },
+		{ 0x27, 0x23, 0x20, 0xff },
+		{ 0x24, 0x20, 0xff, 0xff },
+		{ 0xff, 0xff, 0xff, 0xff }
+	};
+	static const u8 pre_emphasis[4][4] = {
+		{ 0x02, 0x02, 0x02, 0x02 },
+		{ 0x01, 0x01, 0x01, 0xff },
+		{ 0x00, 0x00, 0xff, 0xff },
+		{ 0xff, 0xff, 0xff, 0xff }
+	};
+
+	xpsgtr_write_phy(gtr_phy, L0_TXPMD_TM_48, voltage_swing[pre][voltage]);
+	xpsgtr_write_phy(gtr_phy, L0_TX_ANA_TM_18, pre_emphasis[pre][voltage]);
+}
+
+/*
+ * PHY Operations
+ */
+
+static bool xpsgtr_phy_init_required(struct xpsgtr_phy *gtr_phy)
+{
+	/*
+	 * As USB may save the snapshot of the states during hibernation, doing
+	 * phy_init() will put the USB controller into reset, resulting in the
+	 * losing of the saved snapshot. So try to avoid phy_init() for USB
+	 * except when gtr_phy->skip_phy_init is false (this happens when FPD is
+	 * shutdown during suspend or when gt lane is changed from current one)
+	 */
+	if (gtr_phy->protocol == ICM_PROTOCOL_USB && gtr_phy->skip_phy_init)
+		return false;
+	else
+		return true;
+}
+
+/*
+ * There is a functional issue in the GT. The TX termination resistance can be
+ * out of spec due to a issue in the calibration logic. This is the workaround
+ * to fix it, required for XCZU9EG silicon.
+ */
+static int xpsgtr_phy_tx_term_fix(struct xpsgtr_phy *gtr_phy)
+{
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+	u32 timeout = TIMEOUT_US;
+	u32 nsw;
+
+	/* Enabling Test Mode control for CMN Rest */
+	xpsgtr_clr_set(gtr_dev, TM_CMN_RST, TM_CMN_RST_MASK, TM_CMN_RST_SET);
+
+	/* Set Test Mode reset */
+	xpsgtr_clr_set(gtr_dev, TM_CMN_RST, TM_CMN_RST_MASK, TM_CMN_RST_EN);
+
+	xpsgtr_write(gtr_dev, L3_TM_CALIB_DIG18, 0x00);
+	xpsgtr_write(gtr_dev, L3_TM_CALIB_DIG19, L3_TM_OVERRIDE_NSW_CODE);
+
+	/*
+	 * As a part of work around sequence for PMOS calibration fix,
+	 * we need to configure any lane ICM_CFG to valid protocol. This
+	 * will deassert the CMN_Resetn signal.
+	 */
+	xpsgtr_lane_set_protocol(gtr_phy);
+
+	/* Clear Test Mode reset */
+	xpsgtr_clr_set(gtr_dev, TM_CMN_RST, TM_CMN_RST_MASK, TM_CMN_RST_SET);
+
+	dev_dbg(gtr_dev->dev, "calibrating...\n");
+
+	do {
+		u32 reg = xpsgtr_read(gtr_dev, L3_CALIB_DONE_STATUS);
+
+		if ((reg & L3_CALIB_DONE) == L3_CALIB_DONE)
+			break;
+
+		if (!--timeout) {
+			dev_err(gtr_dev->dev, "calibration time out\n");
+			return -ETIMEDOUT;
+		}
+
+		udelay(1);
+	} while (timeout > 0);
+
+	dev_dbg(gtr_dev->dev, "calibration done\n");
+
+	/* Reading NMOS Register Code */
+	nsw = xpsgtr_read(gtr_dev, L0_TXPMA_ST_3) & L0_DN_CALIB_CODE;
+
+	/* Set Test Mode reset */
+	xpsgtr_clr_set(gtr_dev, TM_CMN_RST, TM_CMN_RST_MASK, TM_CMN_RST_EN);
+
+	/* Writing NMOS register values back [5:3] */
+	xpsgtr_write(gtr_dev, L3_TM_CALIB_DIG19, nsw >> L3_NSW_CALIB_SHIFT);
+
+	/* Writing NMOS register value [2:0] */
+	xpsgtr_write(gtr_dev, L3_TM_CALIB_DIG18,
+		     ((nsw & L3_TM_CALIB_DIG19_NSW) << L3_NSW_SHIFT) |
+		     (1 << L3_NSW_PIPE_SHIFT));
+
+	/* Clear Test Mode reset */
+	xpsgtr_clr_set(gtr_dev, TM_CMN_RST, TM_CMN_RST_MASK, TM_CMN_RST_SET);
+
+	return 0;
+}
+
+static int xpsgtr_phy_init(struct phy *phy)
+{
+	struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+	int ret;
+
+	mutex_lock(&gtr_dev->gtr_mutex);
+
+	/* Configure and enable the clock when peripheral phy_init call */
+	ret = clk_prepare_enable(gtr_dev->clk[gtr_phy->refclk]);
+	if (ret)
+		goto out;
+
+	/* Skip initialization if not required. */
+	if (!xpsgtr_phy_init_required(gtr_phy))
+		goto out;
+
+	if (gtr_dev->tx_term_fix) {
+		ret = xpsgtr_phy_tx_term_fix(gtr_phy);
+		if (ret < 0)
+			goto out_disable_clk;
+
+		gtr_dev->tx_term_fix = false;
+	}
+
+	/* Enable coarse code saturation limiting logic. */
+	xpsgtr_write_phy(gtr_phy, L0_TM_PLL_DIG_37, L0_TM_COARSE_CODE_LIMIT);
+
+	/*
+	 * Configure the PLL, the lane protocol, and perform protocol-specific
+	 * initialization.
+	 */
+	ret = xpsgtr_configure_pll(gtr_phy);
+	if (ret)
+		goto out_disable_clk;
+
+	xpsgtr_lane_set_protocol(gtr_phy);
+
+	switch (gtr_phy->protocol) {
+	case ICM_PROTOCOL_DP:
+		xpsgtr_phy_init_dp(gtr_phy);
+		break;
+
+	case ICM_PROTOCOL_SATA:
+		xpsgtr_phy_init_sata(gtr_phy);
+		break;
+
+	case ICM_PROTOCOL_SGMII:
+		xpsgtr_phy_init_sgmii(gtr_phy);
+		break;
+
+	case ICM_PROTOCOL_USB:
+		xpsgtr_bypass_scrambler_8b10b(gtr_phy, false);
+		break;
+	}
+
+	goto out;
+
+out_disable_clk:
+	clk_disable_unprepare(gtr_dev->clk[gtr_phy->refclk]);
+out:
+	mutex_unlock(&gtr_dev->gtr_mutex);
+	return ret;
+}
+
+static int xpsgtr_phy_exit(struct phy *phy)
+{
+	struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
+	struct xpsgtr_dev *gtr_dev = gtr_phy->dev;
+
+	gtr_phy->skip_phy_init = false;
+
+	/* Ensure that disable clock only, which configure for lane */
+	clk_disable_unprepare(gtr_dev->clk[gtr_phy->refclk]);
+
+	return 0;
+}
+
+static int xpsgtr_phy_power_on(struct phy *phy)
+{
+	struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
+	int ret = 0;
+
+	/* Skip initialization if not required. */
+	if (!xpsgtr_phy_init_required(gtr_phy))
+		return ret;
+	return xpsgtr_wait_pll_lock(phy);
+}
+
+static int xpsgtr_phy_configure(struct phy *phy, union phy_configure_opts *opts)
+{
+	struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
+
+	if (gtr_phy->protocol != ICM_PROTOCOL_DP)
+		return 0;
+
+	xpsgtr_phy_configure_dp(gtr_phy, opts->dp.pre[0], opts->dp.voltage[0]);
+
+	return 0;
+}
+
+static const struct phy_ops xpsgtr_phyops = {
+	.init		= xpsgtr_phy_init,
+	.exit		= xpsgtr_phy_exit,
+	.power_on	= xpsgtr_phy_power_on,
+	.configure	= xpsgtr_phy_configure,
+	.owner		= THIS_MODULE,
+};
+
+/*
+ * OF Xlate Support
+ */
+
+/* Set the lane protocol and instance based on the PHY type and instance number. */
+static int xpsgtr_set_lane_type(struct xpsgtr_phy *gtr_phy, u8 phy_type,
+				unsigned int phy_instance)
+{
+	unsigned int num_phy_types;
+
+	switch (phy_type) {
+	case PHY_TYPE_SATA:
+		num_phy_types = 2;
+		gtr_phy->protocol = ICM_PROTOCOL_SATA;
+		break;
+	case PHY_TYPE_USB3:
+		num_phy_types = 2;
+		gtr_phy->protocol = ICM_PROTOCOL_USB;
+		break;
+	case PHY_TYPE_DP:
+		num_phy_types = 2;
+		gtr_phy->protocol = ICM_PROTOCOL_DP;
+		break;
+	case PHY_TYPE_PCIE:
+		num_phy_types = 4;
+		gtr_phy->protocol = ICM_PROTOCOL_PCIE;
+		break;
+	case PHY_TYPE_SGMII:
+		num_phy_types = 4;
+		gtr_phy->protocol = ICM_PROTOCOL_SGMII;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (phy_instance >= num_phy_types)
+		return -EINVAL;
+
+	gtr_phy->instance = phy_instance;
+	return 0;
+}
+
+/*
+ * Valid combinations of controllers and lanes (Interconnect Matrix). Each
+ * "instance" represents one controller for a lane. For PCIe and DP, the
+ * "instance" is the logical lane in the link. For SATA, USB, and SGMII,
+ * the instance is the index of the controller.
+ *
+ * This information is only used to validate the devicetree reference, and is
+ * not used when programming the hardware.
+ */
+static const unsigned int icm_matrix[NUM_LANES][CONTROLLERS_PER_LANE] = {
+	/* PCIe, SATA, USB, DP, SGMII */
+	{ 0, 0, 0, 1, 0 }, /* Lane 0 */
+	{ 1, 1, 0, 0, 1 }, /* Lane 1 */
+	{ 2, 0, 0, 1, 2 }, /* Lane 2 */
+	{ 3, 1, 1, 0, 3 }, /* Lane 3 */
+};
+
+/* Translate OF phandle and args to PHY instance. */
+static struct phy *xpsgtr_xlate(struct device *dev,
+				const struct of_phandle_args *args)
+{
+	struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
+	struct xpsgtr_phy *gtr_phy;
+	unsigned int phy_instance;
+	unsigned int phy_lane;
+	unsigned int phy_type;
+	unsigned int refclk;
+	unsigned int i;
+	int ret;
+
+	if (args->args_count != 4) {
+		dev_err(dev, "Invalid number of cells in 'phy' property\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/*
+	 * Get the PHY parameters from the OF arguments and derive the lane
+	 * type.
+	 */
+	phy_lane = args->args[0];
+	if (phy_lane >= ARRAY_SIZE(gtr_dev->phys)) {
+		dev_err(dev, "Invalid lane number %u\n", phy_lane);
+		return ERR_PTR(-ENODEV);
+	}
+
+	gtr_phy = &gtr_dev->phys[phy_lane];
+	phy_type = args->args[1];
+	phy_instance = args->args[2];
+
+	guard(mutex)(&gtr_phy->phy->mutex);
+	ret = xpsgtr_set_lane_type(gtr_phy, phy_type, phy_instance);
+	if (ret < 0) {
+		dev_err(gtr_dev->dev, "Invalid PHY type and/or instance\n");
+		return ERR_PTR(ret);
+	}
+
+	refclk = args->args[3];
+	if (refclk >= ARRAY_SIZE(gtr_dev->clk)) {
+		dev_err(dev, "Invalid reference clock number %u\n", refclk);
+		return ERR_PTR(-EINVAL);
+	}
+
+	gtr_phy->refclk = refclk;
+
+	/*
+	 * Ensure that the Interconnect Matrix is obeyed, i.e a given lane type
+	 * is allowed to operate on the lane.
+	 */
+	for (i = 0; i < CONTROLLERS_PER_LANE; i++) {
+		if (icm_matrix[phy_lane][i] == gtr_phy->instance)
+			return gtr_phy->phy;
+	}
+
+	return ERR_PTR(-EINVAL);
+}
+
+/*
+ * DebugFS
+ */
+
+static int xpsgtr_status_read(struct seq_file *seq, void *data)
+{
+	struct device *dev = seq->private;
+	struct xpsgtr_phy *gtr_phy = dev_get_drvdata(dev);
+	struct clk *clk;
+	u32 pll_status;
+
+	mutex_lock(&gtr_phy->phy->mutex);
+	pll_status = xpsgtr_read_phy(gtr_phy, L0_PLL_STATUS_READ_1);
+	clk = gtr_phy->dev->clk[gtr_phy->refclk];
+
+	seq_printf(seq, "Lane:            %u\n", gtr_phy->lane);
+	seq_printf(seq, "Protocol:        %s\n",
+		   xpsgtr_icm_str[gtr_phy->protocol]);
+	seq_printf(seq, "Instance:        %u\n", gtr_phy->instance);
+	seq_printf(seq, "Reference clock: %u (%pC)\n", gtr_phy->refclk, clk);
+	seq_printf(seq, "Reference rate:  %lu\n", clk_get_rate(clk));
+	seq_printf(seq, "PLL locked:      %s\n",
+		   pll_status & PLL_STATUS_LOCKED ? "yes" : "no");
+
+	mutex_unlock(&gtr_phy->phy->mutex);
+	return 0;
+}
+
+/*
+ * Power Management
+ */
+
+static int xpsgtr_runtime_suspend(struct device *dev)
+{
+	struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
+
+	/* Save the snapshot ICM_CFG registers. */
+	gtr_dev->saved_icm_cfg0 = xpsgtr_read(gtr_dev, ICM_CFG0);
+	gtr_dev->saved_icm_cfg1 = xpsgtr_read(gtr_dev, ICM_CFG1);
+
+	xpsgtr_save_lane_regs(gtr_dev);
+
+	return 0;
+}
+
+static int xpsgtr_runtime_resume(struct device *dev)
+{
+	struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
+	unsigned int icm_cfg0, icm_cfg1;
+	unsigned int i;
+	bool skip_phy_init;
+
+	xpsgtr_restore_lane_regs(gtr_dev);
+
+	icm_cfg0 = xpsgtr_read(gtr_dev, ICM_CFG0);
+	icm_cfg1 = xpsgtr_read(gtr_dev, ICM_CFG1);
+
+	/* Return if no GT lanes got configured before suspend. */
+	if (!gtr_dev->saved_icm_cfg0 && !gtr_dev->saved_icm_cfg1)
+		return 0;
+
+	/* Check if the ICM configurations changed after suspend. */
+	if (icm_cfg0 == gtr_dev->saved_icm_cfg0 &&
+	    icm_cfg1 == gtr_dev->saved_icm_cfg1)
+		skip_phy_init = true;
+	else
+		skip_phy_init = false;
+
+	/* Update the skip_phy_init for all gtr_phy instances. */
+	for (i = 0; i < ARRAY_SIZE(gtr_dev->phys); i++)
+		gtr_dev->phys[i].skip_phy_init = skip_phy_init;
+
+	return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(xpsgtr_pm_ops, xpsgtr_runtime_suspend,
+				 xpsgtr_runtime_resume, NULL);
+/*
+ * Probe & Platform Driver
+ */
+
+static int xpsgtr_get_ref_clocks(struct xpsgtr_dev *gtr_dev)
+{
+	unsigned int refclk;
+
+	for (refclk = 0; refclk < ARRAY_SIZE(gtr_dev->clk); ++refclk) {
+		struct clk *clk;
+		char name[8];
+
+		snprintf(name, sizeof(name), "ref%u", refclk);
+		clk = devm_clk_get_optional(gtr_dev->dev, name);
+		if (IS_ERR(clk)) {
+			return dev_err_probe(gtr_dev->dev, PTR_ERR(clk),
+					     "Failed to get ref clock %u\n",
+					     refclk);
+		}
+
+		if (!clk)
+			continue;
+
+		gtr_dev->clk[refclk] = clk;
+	}
+
+	return 0;
+}
+
+static int xpsgtr_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct xpsgtr_dev *gtr_dev;
+	struct phy_provider *provider;
+	unsigned int port;
+	int ret;
+
+	gtr_dev = devm_kzalloc(&pdev->dev, sizeof(*gtr_dev), GFP_KERNEL);
+	if (!gtr_dev)
+		return -ENOMEM;
+
+	gtr_dev->dev = &pdev->dev;
+	platform_set_drvdata(pdev, gtr_dev);
+
+	mutex_init(&gtr_dev->gtr_mutex);
+
+	if (of_device_is_compatible(np, "xlnx,zynqmp-psgtr"))
+		gtr_dev->tx_term_fix =
+			of_property_read_bool(np, "xlnx,tx-termination-fix");
+
+	/* Acquire resources. */
+	gtr_dev->serdes = devm_platform_ioremap_resource_byname(pdev, "serdes");
+	if (IS_ERR(gtr_dev->serdes))
+		return PTR_ERR(gtr_dev->serdes);
+
+	gtr_dev->siou = devm_platform_ioremap_resource_byname(pdev, "siou");
+	if (IS_ERR(gtr_dev->siou))
+		return PTR_ERR(gtr_dev->siou);
+
+	ret = xpsgtr_get_ref_clocks(gtr_dev);
+	if (ret)
+		return ret;
+
+	/* Create PHYs. */
+	for (port = 0; port < ARRAY_SIZE(gtr_dev->phys); ++port) {
+		struct xpsgtr_phy *gtr_phy = &gtr_dev->phys[port];
+		struct phy *phy;
+
+		gtr_phy->lane = port;
+		gtr_phy->dev = gtr_dev;
+
+		phy = devm_phy_create(&pdev->dev, np, &xpsgtr_phyops);
+		if (IS_ERR(phy)) {
+			dev_err(&pdev->dev, "failed to create PHY\n");
+			return PTR_ERR(phy);
+		}
+
+		gtr_phy->phy = phy;
+		phy_set_drvdata(phy, gtr_phy);
+		debugfs_create_devm_seqfile(&phy->dev, "status", phy->debugfs,
+					    xpsgtr_status_read);
+	}
+
+	/* Register the PHY provider. */
+	provider = devm_of_phy_provider_register(&pdev->dev, xpsgtr_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(&pdev->dev, "registering provider failed\n");
+		return PTR_ERR(provider);
+	}
+
+	gtr_dev->saved_regs = devm_kmalloc(gtr_dev->dev,
+					   sizeof(save_reg_address),
+					   GFP_KERNEL);
+	if (!gtr_dev->saved_regs)
+		return -ENOMEM;
+
+	pm_runtime_set_active(gtr_dev->dev);
+	pm_runtime_enable(gtr_dev->dev);
+
+	ret = pm_runtime_resume_and_get(gtr_dev->dev);
+	if (ret < 0) {
+		pm_runtime_disable(gtr_dev->dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void xpsgtr_remove(struct platform_device *pdev)
+{
+	struct xpsgtr_dev *gtr_dev = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(gtr_dev->dev);
+	pm_runtime_put_noidle(gtr_dev->dev);
+	pm_runtime_set_suspended(gtr_dev->dev);
+}
+
+static const struct of_device_id xpsgtr_of_match[] = {
+	{ .compatible = "xlnx,zynqmp-psgtr", },
+	{ .compatible = "xlnx,zynqmp-psgtr-v1.1", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, xpsgtr_of_match);
+
+static struct platform_driver xpsgtr_driver = {
+	.probe = xpsgtr_probe,
+	.remove = xpsgtr_remove,
+	.driver = {
+		.name = "xilinx-psgtr",
+		.of_match_table	= xpsgtr_of_match,
+		.pm =  pm_ptr(&xpsgtr_pm_ops),
+	},
+};
+
+module_platform_driver(xpsgtr_driver);
+
+MODULE_AUTHOR("Xilinx Inc.");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Xilinx ZynqMP High speed Gigabit Transceiver");