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, 445 insertions, 0 deletions

diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
new file mode 100644
index 000000000..249dc0193
--- /dev/null
+++ b/drivers/pwm/pwm-tegra.c
@@ -0,0 +1,445 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * drivers/pwm/pwm-tegra.c
+ *
+ * Tegra pulse-width-modulation controller driver
+ *
+ * Copyright (c) 2010-2020, NVIDIA Corporation.
+ * Based on arch/arm/plat-mxc/pwm.c by Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * Overview of Tegra Pulse Width Modulator Register:
+ * 1. 13-bit: Frequency division (SCALE)
+ * 2. 8-bit : Pulse division (DUTY)
+ * 3. 1-bit : Enable bit
+ *
+ * The PWM clock frequency is divided by 256 before subdividing it based
+ * on the programmable frequency division value to generate the required
+ * frequency for PWM output. The maximum output frequency that can be
+ * achieved is (max rate of source clock) / 256.
+ * e.g. if source clock rate is 408 MHz, maximum output frequency can be:
+ * 408 MHz/256 = 1.6 MHz.
+ * This 1.6 MHz frequency can further be divided using SCALE value in PWM.
+ *
+ * PWM pulse width: 8 bits are usable [23:16] for varying pulse width.
+ * To achieve 100% duty cycle, program Bit [24] of this register to
+ * 1’b1. In which case the other bits [23:16] are set to don't care.
+ *
+ * Limitations:
+ * -	When PWM is disabled, the output is driven to inactive.
+ * -	It does not allow the current PWM period to complete and
+ *	stops abruptly.
+ *
+ * -	If the register is reconfigured while PWM is running,
+ *	it does not complete the currently running period.
+ *
+ * -	If the user input duty is beyond acceptible limits,
+ *	-EINVAL is returned.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pm_opp.h>
+#include <linux/pwm.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/reset.h>
+
+#include <soc/tegra/common.h>
+
+#define PWM_ENABLE	(1 << 31)
+#define PWM_DUTY_WIDTH	8
+#define PWM_DUTY_SHIFT	16
+#define PWM_SCALE_WIDTH	13
+#define PWM_SCALE_SHIFT	0
+
+struct tegra_pwm_soc {
+	unsigned int num_channels;
+
+	/* Maximum IP frequency for given SoCs */
+	unsigned long max_frequency;
+};
+
+struct tegra_pwm_chip {
+	struct pwm_chip chip;
+	struct device *dev;
+
+	struct clk *clk;
+	struct reset_control*rst;
+
+	unsigned long clk_rate;
+	unsigned long min_period_ns;
+
+	void __iomem *regs;
+
+	const struct tegra_pwm_soc *soc;
+};
+
+static inline struct tegra_pwm_chip *to_tegra_pwm_chip(struct pwm_chip *chip)
+{
+	return container_of(chip, struct tegra_pwm_chip, chip);
+}
+
+static inline u32 pwm_readl(struct tegra_pwm_chip *pc, unsigned int offset)
+{
+	return readl(pc->regs + (offset << 4));
+}
+
+static inline void pwm_writel(struct tegra_pwm_chip *pc, unsigned int offset, u32 value)
+{
+	writel(value, pc->regs + (offset << 4));
+}
+
+static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
+			    int duty_ns, int period_ns)
+{
+	struct tegra_pwm_chip *pc = to_tegra_pwm_chip(chip);
+	unsigned long long c = duty_ns;
+	unsigned long rate, required_clk_rate;
+	u32 val = 0;
+	int err;
+
+	/*
+	 * Convert from duty_ns / period_ns to a fixed number of duty ticks
+	 * per (1 << PWM_DUTY_WIDTH) cycles and make sure to round to the
+	 * nearest integer during division.
+	 */
+	c *= (1 << PWM_DUTY_WIDTH);
+	c = DIV_ROUND_CLOSEST_ULL(c, period_ns);
+
+	val = (u32)c << PWM_DUTY_SHIFT;
+
+	/*
+	 *  min period = max clock limit >> PWM_DUTY_WIDTH
+	 */
+	if (period_ns < pc->min_period_ns)
+		return -EINVAL;
+
+	/*
+	 * Compute the prescaler value for which (1 << PWM_DUTY_WIDTH)
+	 * cycles at the PWM clock rate will take period_ns nanoseconds.
+	 *
+	 * num_channels: If single instance of PWM controller has multiple
+	 * channels (e.g. Tegra210 or older) then it is not possible to
+	 * configure separate clock rates to each of the channels, in such
+	 * case the value stored during probe will be referred.
+	 *
+	 * If every PWM controller instance has one channel respectively, i.e.
+	 * nums_channels == 1 then only the clock rate can be modified
+	 * dynamically (e.g. Tegra186 or Tegra194).
+	 */
+	if (pc->soc->num_channels == 1) {
+		/*
+		 * Rate is multiplied with 2^PWM_DUTY_WIDTH so that it matches
+		 * with the maximum possible rate that the controller can
+		 * provide. Any further lower value can be derived by setting
+		 * PFM bits[0:12].
+		 *
+		 * required_clk_rate is a reference rate for source clock and
+		 * it is derived based on user requested period. By setting the
+		 * source clock rate as required_clk_rate, PWM controller will
+		 * be able to configure the requested period.
+		 */
+		required_clk_rate = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC << PWM_DUTY_WIDTH,
+						     period_ns);
+
+		if (required_clk_rate > clk_round_rate(pc->clk, required_clk_rate))
+			/*
+			 * required_clk_rate is a lower bound for the input
+			 * rate; for lower rates there is no value for PWM_SCALE
+			 * that yields a period less than or equal to the
+			 * requested period. Hence, for lower rates, double the
+			 * required_clk_rate to get a clock rate that can meet
+			 * the requested period.
+			 */
+			required_clk_rate *= 2;
+
+		err = dev_pm_opp_set_rate(pc->dev, required_clk_rate);
+		if (err < 0)
+			return -EINVAL;
+
+		/* Store the new rate for further references */
+		pc->clk_rate = clk_get_rate(pc->clk);
+	}
+
+	/* Consider precision in PWM_SCALE_WIDTH rate calculation */
+	rate = mul_u64_u64_div_u64(pc->clk_rate, period_ns,
+				   (u64)NSEC_PER_SEC << PWM_DUTY_WIDTH);
+
+	/*
+	 * Since the actual PWM divider is the register's frequency divider
+	 * field plus 1, we need to decrement to get the correct value to
+	 * write to the register.
+	 */
+	if (rate > 0)
+		rate--;
+	else
+		return -EINVAL;
+
+	/*
+	 * Make sure that the rate will fit in the register's frequency
+	 * divider field.
+	 */
+	if (rate >> PWM_SCALE_WIDTH)
+		return -EINVAL;
+
+	val |= rate << PWM_SCALE_SHIFT;
+
+	/*
+	 * If the PWM channel is disabled, make sure to turn on the clock
+	 * before writing the register. Otherwise, keep it enabled.
+	 */
+	if (!pwm_is_enabled(pwm)) {
+		err = pm_runtime_resume_and_get(pc->dev);
+		if (err)
+			return err;
+	} else
+		val |= PWM_ENABLE;
+
+	pwm_writel(pc, pwm->hwpwm, val);
+
+	/*
+	 * If the PWM is not enabled, turn the clock off again to save power.
+	 */
+	if (!pwm_is_enabled(pwm))
+		pm_runtime_put(pc->dev);
+
+	return 0;
+}
+
+static int tegra_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+	struct tegra_pwm_chip *pc = to_tegra_pwm_chip(chip);
+	int rc = 0;
+	u32 val;
+
+	rc = pm_runtime_resume_and_get(pc->dev);
+	if (rc)
+		return rc;
+
+	val = pwm_readl(pc, pwm->hwpwm);
+	val |= PWM_ENABLE;
+	pwm_writel(pc, pwm->hwpwm, val);
+
+	return 0;
+}
+
+static void tegra_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+	struct tegra_pwm_chip *pc = to_tegra_pwm_chip(chip);
+	u32 val;
+
+	val = pwm_readl(pc, pwm->hwpwm);
+	val &= ~PWM_ENABLE;
+	pwm_writel(pc, pwm->hwpwm, val);
+
+	pm_runtime_put_sync(pc->dev);
+}
+
+static int tegra_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			   const struct pwm_state *state)
+{
+	int err;
+	bool enabled = pwm->state.enabled;
+
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
+
+	if (!state->enabled) {
+		if (enabled)
+			tegra_pwm_disable(chip, pwm);
+
+		return 0;
+	}
+
+	err = tegra_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period);
+	if (err)
+		return err;
+
+	if (!enabled)
+		err = tegra_pwm_enable(chip, pwm);
+
+	return err;
+}
+
+static const struct pwm_ops tegra_pwm_ops = {
+	.apply = tegra_pwm_apply,
+	.owner = THIS_MODULE,
+};
+
+static int tegra_pwm_probe(struct platform_device *pdev)
+{
+	struct tegra_pwm_chip *pc;
+	int ret;
+
+	pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
+	if (!pc)
+		return -ENOMEM;
+
+	pc->soc = of_device_get_match_data(&pdev->dev);
+	pc->dev = &pdev->dev;
+
+	pc->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pc->regs))
+		return PTR_ERR(pc->regs);
+
+	platform_set_drvdata(pdev, pc);
+
+	pc->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(pc->clk))
+		return PTR_ERR(pc->clk);
+
+	ret = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
+	if (ret)
+		return ret;
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret)
+		return ret;
+
+	/* Set maximum frequency of the IP */
+	ret = dev_pm_opp_set_rate(pc->dev, pc->soc->max_frequency);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to set max frequency: %d\n", ret);
+		goto put_pm;
+	}
+
+	/*
+	 * The requested and configured frequency may differ due to
+	 * clock register resolutions. Get the configured frequency
+	 * so that PWM period can be calculated more accurately.
+	 */
+	pc->clk_rate = clk_get_rate(pc->clk);
+
+	/* Set minimum limit of PWM period for the IP */
+	pc->min_period_ns =
+	    (NSEC_PER_SEC / (pc->soc->max_frequency >> PWM_DUTY_WIDTH)) + 1;
+
+	pc->rst = devm_reset_control_get_exclusive(&pdev->dev, "pwm");
+	if (IS_ERR(pc->rst)) {
+		ret = PTR_ERR(pc->rst);
+		dev_err(&pdev->dev, "Reset control is not found: %d\n", ret);
+		goto put_pm;
+	}
+
+	reset_control_deassert(pc->rst);
+
+	pc->chip.dev = &pdev->dev;
+	pc->chip.ops = &tegra_pwm_ops;
+	pc->chip.npwm = pc->soc->num_channels;
+
+	ret = pwmchip_add(&pc->chip);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
+		reset_control_assert(pc->rst);
+		goto put_pm;
+	}
+
+	pm_runtime_put(&pdev->dev);
+
+	return 0;
+put_pm:
+	pm_runtime_put_sync_suspend(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
+	return ret;
+}
+
+static int tegra_pwm_remove(struct platform_device *pdev)
+{
+	struct tegra_pwm_chip *pc = platform_get_drvdata(pdev);
+
+	pwmchip_remove(&pc->chip);
+
+	reset_control_assert(pc->rst);
+
+	pm_runtime_force_suspend(&pdev->dev);
+
+	return 0;
+}
+
+static int __maybe_unused tegra_pwm_runtime_suspend(struct device *dev)
+{
+	struct tegra_pwm_chip *pc = dev_get_drvdata(dev);
+	int err;
+
+	clk_disable_unprepare(pc->clk);
+
+	err = pinctrl_pm_select_sleep_state(dev);
+	if (err) {
+		clk_prepare_enable(pc->clk);
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused tegra_pwm_runtime_resume(struct device *dev)
+{
+	struct tegra_pwm_chip *pc = dev_get_drvdata(dev);
+	int err;
+
+	err = pinctrl_pm_select_default_state(dev);
+	if (err)
+		return err;
+
+	err = clk_prepare_enable(pc->clk);
+	if (err) {
+		pinctrl_pm_select_sleep_state(dev);
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct tegra_pwm_soc tegra20_pwm_soc = {
+	.num_channels = 4,
+	.max_frequency = 48000000UL,
+};
+
+static const struct tegra_pwm_soc tegra186_pwm_soc = {
+	.num_channels = 1,
+	.max_frequency = 102000000UL,
+};
+
+static const struct tegra_pwm_soc tegra194_pwm_soc = {
+	.num_channels = 1,
+	.max_frequency = 408000000UL,
+};
+
+static const struct of_device_id tegra_pwm_of_match[] = {
+	{ .compatible = "nvidia,tegra20-pwm", .data = &tegra20_pwm_soc },
+	{ .compatible = "nvidia,tegra186-pwm", .data = &tegra186_pwm_soc },
+	{ .compatible = "nvidia,tegra194-pwm", .data = &tegra194_pwm_soc },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tegra_pwm_of_match);
+
+static const struct dev_pm_ops tegra_pwm_pm_ops = {
+	SET_RUNTIME_PM_OPS(tegra_pwm_runtime_suspend, tegra_pwm_runtime_resume,
+			   NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static struct platform_driver tegra_pwm_driver = {
+	.driver = {
+		.name = "tegra-pwm",
+		.of_match_table = tegra_pwm_of_match,
+		.pm = &tegra_pwm_pm_ops,
+	},
+	.probe = tegra_pwm_probe,
+	.remove = tegra_pwm_remove,
+};
+
+module_platform_driver(tegra_pwm_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sandipan Patra <spatra@nvidia.com>");
+MODULE_DESCRIPTION("Tegra PWM controller driver");
+MODULE_ALIAS("platform:tegra-pwm");