Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 431 insertions, 0 deletions

diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c
new file mode 100644
index 000000000..59860d175
--- /dev/null
+++ b/drivers/usb/cdns3/cdns3-imx.c
@@ -0,0 +1,431 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cdns3-imx.c - NXP i.MX specific Glue layer for Cadence USB Controller
+ *
+ * Copyright (C) 2019 NXP
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/iopoll.h>
+#include <linux/pm_runtime.h>
+#include "core.h"
+
+#define USB3_CORE_CTRL1    0x00
+#define USB3_CORE_CTRL2    0x04
+#define USB3_INT_REG       0x08
+#define USB3_CORE_STATUS   0x0c
+#define XHCI_DEBUG_LINK_ST 0x10
+#define XHCI_DEBUG_BUS     0x14
+#define USB3_SSPHY_CTRL1   0x40
+#define USB3_SSPHY_CTRL2   0x44
+#define USB3_SSPHY_STATUS  0x4c
+#define USB2_PHY_CTRL1     0x50
+#define USB2_PHY_CTRL2     0x54
+#define USB2_PHY_STATUS    0x5c
+
+/* Register bits definition */
+
+/* USB3_CORE_CTRL1 */
+#define SW_RESET_MASK	GENMASK(31, 26)
+#define PWR_SW_RESET	BIT(31)
+#define APB_SW_RESET	BIT(30)
+#define AXI_SW_RESET	BIT(29)
+#define RW_SW_RESET	BIT(28)
+#define PHY_SW_RESET	BIT(27)
+#define PHYAHB_SW_RESET	BIT(26)
+#define ALL_SW_RESET	(PWR_SW_RESET | APB_SW_RESET | AXI_SW_RESET | \
+		RW_SW_RESET | PHY_SW_RESET | PHYAHB_SW_RESET)
+#define OC_DISABLE	BIT(9)
+#define MDCTRL_CLK_SEL	BIT(7)
+#define MODE_STRAP_MASK	(0x7)
+#define DEV_MODE	(1 << 2)
+#define HOST_MODE	(1 << 1)
+#define OTG_MODE	(1 << 0)
+
+/* USB3_INT_REG */
+#define CLK_125_REQ	BIT(29)
+#define LPM_CLK_REQ	BIT(28)
+#define DEVU3_WAEKUP_EN	BIT(14)
+#define OTG_WAKEUP_EN	BIT(12)
+#define DEV_INT_EN	(3 << 8) /* DEV INT b9:8 */
+#define HOST_INT1_EN	(1 << 0) /* HOST INT b7:0 */
+
+/* USB3_CORE_STATUS */
+#define MDCTRL_CLK_STATUS	BIT(15)
+#define DEV_POWER_ON_READY	BIT(13)
+#define HOST_POWER_ON_READY	BIT(12)
+
+/* USB3_SSPHY_STATUS */
+#define CLK_VALID_MASK		(0x3f << 26)
+#define CLK_VALID_COMPARE_BITS	(0xf << 28)
+#define PHY_REFCLK_REQ		(1 << 0)
+
+/* OTG registers definition */
+#define OTGSTS		0x4
+/* OTGSTS */
+#define OTG_NRDY	BIT(11)
+
+/* xHCI registers definition  */
+#define XECP_PM_PMCSR		0x8018
+#define XECP_AUX_CTRL_REG1	0x8120
+
+/* Register bits definition */
+/* XECP_AUX_CTRL_REG1 */
+#define CFG_RXDET_P3_EN		BIT(15)
+
+/* XECP_PM_PMCSR */
+#define PS_MASK			GENMASK(1, 0)
+#define PS_D0			0
+#define PS_D1			1
+
+struct cdns_imx {
+	struct device *dev;
+	void __iomem *noncore;
+	struct clk_bulk_data *clks;
+	int num_clks;
+	struct platform_device *cdns3_pdev;
+};
+
+static inline u32 cdns_imx_readl(struct cdns_imx *data, u32 offset)
+{
+	return readl(data->noncore + offset);
+}
+
+static inline void cdns_imx_writel(struct cdns_imx *data, u32 offset, u32 value)
+{
+	writel(value, data->noncore + offset);
+}
+
+static const struct clk_bulk_data imx_cdns3_core_clks[] = {
+	{ .id = "usb3_lpm_clk" },
+	{ .id = "usb3_bus_clk" },
+	{ .id = "usb3_aclk" },
+	{ .id = "usb3_ipg_clk" },
+	{ .id = "usb3_core_pclk" },
+};
+
+static int cdns_imx_noncore_init(struct cdns_imx *data)
+{
+	u32 value;
+	int ret;
+	struct device *dev = data->dev;
+
+	cdns_imx_writel(data, USB3_SSPHY_STATUS, CLK_VALID_MASK);
+	udelay(1);
+	ret = readl_poll_timeout(data->noncore + USB3_SSPHY_STATUS, value,
+		(value & CLK_VALID_COMPARE_BITS) == CLK_VALID_COMPARE_BITS,
+		10, 100000);
+	if (ret) {
+		dev_err(dev, "wait clkvld timeout\n");
+		return ret;
+	}
+
+	value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+	value |= ALL_SW_RESET;
+	cdns_imx_writel(data, USB3_CORE_CTRL1, value);
+	udelay(1);
+
+	value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+	value = (value & ~MODE_STRAP_MASK) | OTG_MODE | OC_DISABLE;
+	cdns_imx_writel(data, USB3_CORE_CTRL1, value);
+
+	value = cdns_imx_readl(data, USB3_INT_REG);
+	value |= HOST_INT1_EN | DEV_INT_EN;
+	cdns_imx_writel(data, USB3_INT_REG, value);
+
+	value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+	value &= ~ALL_SW_RESET;
+	cdns_imx_writel(data, USB3_CORE_CTRL1, value);
+	return ret;
+}
+
+static int cdns_imx_platform_suspend(struct device *dev,
+	bool suspend, bool wakeup);
+static struct cdns3_platform_data cdns_imx_pdata = {
+	.platform_suspend = cdns_imx_platform_suspend,
+	.quirks		  = CDNS3_DEFAULT_PM_RUNTIME_ALLOW,
+};
+
+static const struct of_dev_auxdata cdns_imx_auxdata[] = {
+	{
+		.compatible = "cdns,usb3",
+		.platform_data = &cdns_imx_pdata,
+	},
+	{},
+};
+
+static int cdns_imx_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct cdns_imx *data;
+	int ret;
+
+	if (!node)
+		return -ENODEV;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, data);
+	data->dev = dev;
+	data->noncore = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(data->noncore)) {
+		dev_err(dev, "can't map IOMEM resource\n");
+		return PTR_ERR(data->noncore);
+	}
+
+	data->num_clks = ARRAY_SIZE(imx_cdns3_core_clks);
+	data->clks = devm_kmemdup(dev, imx_cdns3_core_clks,
+				sizeof(imx_cdns3_core_clks), GFP_KERNEL);
+	if (!data->clks)
+		return -ENOMEM;
+
+	ret = devm_clk_bulk_get(dev, data->num_clks, data->clks);
+	if (ret)
+		return ret;
+
+	ret = clk_bulk_prepare_enable(data->num_clks, data->clks);
+	if (ret)
+		return ret;
+
+	ret = cdns_imx_noncore_init(data);
+	if (ret)
+		goto err;
+
+	ret = of_platform_populate(node, NULL, cdns_imx_auxdata, dev);
+	if (ret) {
+		dev_err(dev, "failed to create children: %d\n", ret);
+		goto err;
+	}
+
+	device_set_wakeup_capable(dev, true);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	return ret;
+err:
+	clk_bulk_disable_unprepare(data->num_clks, data->clks);
+	return ret;
+}
+
+static int cdns_imx_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct cdns_imx *data = dev_get_drvdata(dev);
+
+	pm_runtime_get_sync(dev);
+	of_platform_depopulate(dev);
+	clk_bulk_disable_unprepare(data->num_clks, data->clks);
+	pm_runtime_disable(dev);
+	pm_runtime_put_noidle(dev);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static void cdns3_set_wakeup(struct cdns_imx *data, bool enable)
+{
+	u32 value;
+
+	value = cdns_imx_readl(data, USB3_INT_REG);
+	if (enable)
+		value |= OTG_WAKEUP_EN | DEVU3_WAEKUP_EN;
+	else
+		value &= ~(OTG_WAKEUP_EN | DEVU3_WAEKUP_EN);
+
+	cdns_imx_writel(data, USB3_INT_REG, value);
+}
+
+static int cdns_imx_platform_suspend(struct device *dev,
+		bool suspend, bool wakeup)
+{
+	struct cdns *cdns = dev_get_drvdata(dev);
+	struct device *parent = dev->parent;
+	struct cdns_imx *data = dev_get_drvdata(parent);
+	void __iomem *otg_regs = (void __iomem *)(cdns->otg_regs);
+	void __iomem *xhci_regs = cdns->xhci_regs;
+	u32 value;
+	int ret = 0;
+
+	if (cdns->role != USB_ROLE_HOST)
+		return 0;
+
+	if (suspend) {
+		/* SW request low power when all usb ports allow to it ??? */
+		value = readl(xhci_regs + XECP_PM_PMCSR);
+		value &= ~PS_MASK;
+		value |= PS_D1;
+		writel(value, xhci_regs + XECP_PM_PMCSR);
+
+		/* mdctrl_clk_sel */
+		value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+		value |= MDCTRL_CLK_SEL;
+		cdns_imx_writel(data, USB3_CORE_CTRL1, value);
+
+		/* wait for mdctrl_clk_status */
+		value = cdns_imx_readl(data, USB3_CORE_STATUS);
+		ret = readl_poll_timeout(data->noncore + USB3_CORE_STATUS, value,
+			(value & MDCTRL_CLK_STATUS) == MDCTRL_CLK_STATUS,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait mdctrl_clk_status timeout\n");
+
+		/* wait lpm_clk_req to be 0 */
+		value = cdns_imx_readl(data, USB3_INT_REG);
+		ret = readl_poll_timeout(data->noncore + USB3_INT_REG, value,
+			(value & LPM_CLK_REQ) != LPM_CLK_REQ,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait lpm_clk_req timeout\n");
+
+		/* wait phy_refclk_req to be 0 */
+		value = cdns_imx_readl(data, USB3_SSPHY_STATUS);
+		ret = readl_poll_timeout(data->noncore + USB3_SSPHY_STATUS, value,
+			(value & PHY_REFCLK_REQ) != PHY_REFCLK_REQ,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait phy_refclk_req timeout\n");
+
+		cdns3_set_wakeup(data, wakeup);
+	} else {
+		cdns3_set_wakeup(data, false);
+
+		/* SW request D0 */
+		value = readl(xhci_regs + XECP_PM_PMCSR);
+		value &= ~PS_MASK;
+		value |= PS_D0;
+		writel(value, xhci_regs + XECP_PM_PMCSR);
+
+		/* clr CFG_RXDET_P3_EN */
+		value = readl(xhci_regs + XECP_AUX_CTRL_REG1);
+		value &= ~CFG_RXDET_P3_EN;
+		writel(value, xhci_regs + XECP_AUX_CTRL_REG1);
+
+		/* clear mdctrl_clk_sel */
+		value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+		value &= ~MDCTRL_CLK_SEL;
+		cdns_imx_writel(data, USB3_CORE_CTRL1, value);
+
+		/* wait CLK_125_REQ to be 1 */
+		value = cdns_imx_readl(data, USB3_INT_REG);
+		ret = readl_poll_timeout(data->noncore + USB3_INT_REG, value,
+			(value & CLK_125_REQ) == CLK_125_REQ,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait CLK_125_REQ timeout\n");
+
+		/* wait for mdctrl_clk_status is cleared */
+		value = cdns_imx_readl(data, USB3_CORE_STATUS);
+		ret = readl_poll_timeout(data->noncore + USB3_CORE_STATUS, value,
+			(value & MDCTRL_CLK_STATUS) != MDCTRL_CLK_STATUS,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait mdctrl_clk_status cleared timeout\n");
+
+		/* Wait until OTG_NRDY is 0 */
+		value = readl(otg_regs + OTGSTS);
+		ret = readl_poll_timeout(otg_regs + OTGSTS, value,
+			(value & OTG_NRDY) != OTG_NRDY,
+			10, 100000);
+		if (ret)
+			dev_warn(parent, "wait OTG ready timeout\n");
+	}
+
+	return ret;
+
+}
+
+static int cdns_imx_resume(struct device *dev)
+{
+	struct cdns_imx *data = dev_get_drvdata(dev);
+
+	return clk_bulk_prepare_enable(data->num_clks, data->clks);
+}
+
+static int cdns_imx_suspend(struct device *dev)
+{
+	struct cdns_imx *data = dev_get_drvdata(dev);
+
+	clk_bulk_disable_unprepare(data->num_clks, data->clks);
+
+	return 0;
+}
+
+
+/* Indicate if the controller was power lost before */
+static inline bool cdns_imx_is_power_lost(struct cdns_imx *data)
+{
+	u32 value;
+
+	value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+	if ((value & SW_RESET_MASK) == ALL_SW_RESET)
+		return true;
+	else
+		return false;
+}
+
+static int __maybe_unused cdns_imx_system_resume(struct device *dev)
+{
+	struct cdns_imx *data = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cdns_imx_resume(dev);
+	if (ret)
+		return ret;
+
+	if (cdns_imx_is_power_lost(data)) {
+		dev_dbg(dev, "resume from power lost\n");
+		ret = cdns_imx_noncore_init(data);
+		if (ret)
+			cdns_imx_suspend(dev);
+	}
+
+	return ret;
+}
+
+#else
+static int cdns_imx_platform_suspend(struct device *dev,
+	bool suspend, bool wakeup)
+{
+	return 0;
+}
+
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops cdns_imx_pm_ops = {
+	SET_RUNTIME_PM_OPS(cdns_imx_suspend, cdns_imx_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(cdns_imx_suspend, cdns_imx_system_resume)
+};
+
+static const struct of_device_id cdns_imx_of_match[] = {
+	{ .compatible = "fsl,imx8qm-usb3", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, cdns_imx_of_match);
+
+static struct platform_driver cdns_imx_driver = {
+	.probe		= cdns_imx_probe,
+	.remove		= cdns_imx_remove,
+	.driver		= {
+		.name	= "cdns3-imx",
+		.of_match_table	= cdns_imx_of_match,
+		.pm	= &cdns_imx_pm_ops,
+	},
+};
+module_platform_driver(cdns_imx_driver);
+
+MODULE_ALIAS("platform:cdns3-imx");
+MODULE_AUTHOR("Peter Chen <peter.chen@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Cadence USB3 i.MX Glue Layer");