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, 418 insertions, 0 deletions

diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
new file mode 100644
index 000000000..292b5a1ca
--- /dev/null
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -0,0 +1,418 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Watchdog driver for Atmel AT91SAM9x processors.
+ *
+ * Copyright (C) 2008 Renaud CERRATO r.cerrato@til-technologies.fr
+ *
+ */
+
+/*
+ * The Watchdog Timer Mode Register can be only written to once. If the
+ * timeout need to be set from Linux, be sure that the bootstrap or the
+ * bootloader doesn't write to this register.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+
+#include "at91sam9_wdt.h"
+
+#define DRV_NAME "AT91SAM9 Watchdog"
+
+#define wdt_read(wdt, field) \
+	readl_relaxed((wdt)->base + (field))
+#define wdt_write(wtd, field, val) \
+	writel_relaxed((val), (wdt)->base + (field))
+
+/* AT91SAM9 watchdog runs a 12bit counter @ 256Hz,
+ * use this to convert a watchdog
+ * value from/to milliseconds.
+ */
+#define ticks_to_hz_rounddown(t)	((((t) + 1) * HZ) >> 8)
+#define ticks_to_hz_roundup(t)		(((((t) + 1) * HZ) + 255) >> 8)
+#define ticks_to_secs(t)		(((t) + 1) >> 8)
+#define secs_to_ticks(s)		((s) ? (((s) << 8) - 1) : 0)
+
+#define WDT_MR_RESET	0x3FFF2FFF
+
+/* Watchdog max counter value in ticks */
+#define WDT_COUNTER_MAX_TICKS	0xFFF
+
+/* Watchdog max delta/value in secs */
+#define WDT_COUNTER_MAX_SECS	ticks_to_secs(WDT_COUNTER_MAX_TICKS)
+
+/* Hardware timeout in seconds */
+#define WDT_HW_TIMEOUT 2
+
+/* Timer heartbeat (500ms) */
+#define WDT_TIMEOUT	(HZ/2)
+
+/* User land timeout */
+#define WDT_HEARTBEAT 15
+static int heartbeat;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
+	"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
+	"(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define to_wdt(wdd) container_of(wdd, struct at91wdt, wdd)
+struct at91wdt {
+	struct watchdog_device wdd;
+	void __iomem *base;
+	unsigned long next_heartbeat;	/* the next_heartbeat for the timer */
+	struct timer_list timer;	/* The timer that pings the watchdog */
+	u32 mr;
+	u32 mr_mask;
+	unsigned long heartbeat;	/* WDT heartbeat in jiffies */
+	bool nowayout;
+	unsigned int irq;
+	struct clk *sclk;
+};
+
+/* ......................................................................... */
+
+static irqreturn_t wdt_interrupt(int irq, void *dev_id)
+{
+	struct at91wdt *wdt = (struct at91wdt *)dev_id;
+
+	if (wdt_read(wdt, AT91_WDT_SR)) {
+		pr_crit("at91sam9 WDT software reset\n");
+		emergency_restart();
+		pr_crit("Reboot didn't ?????\n");
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Reload the watchdog timer.  (ie, pat the watchdog)
+ */
+static inline void at91_wdt_reset(struct at91wdt *wdt)
+{
+	wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
+}
+
+/*
+ * Timer tick
+ */
+static void at91_ping(struct timer_list *t)
+{
+	struct at91wdt *wdt = from_timer(wdt, t, timer);
+	if (time_before(jiffies, wdt->next_heartbeat) ||
+	    !watchdog_active(&wdt->wdd)) {
+		at91_wdt_reset(wdt);
+		mod_timer(&wdt->timer, jiffies + wdt->heartbeat);
+	} else {
+		pr_crit("I will reset your machine !\n");
+	}
+}
+
+static int at91_wdt_start(struct watchdog_device *wdd)
+{
+	struct at91wdt *wdt = to_wdt(wdd);
+	/* calculate when the next userspace timeout will be */
+	wdt->next_heartbeat = jiffies + wdd->timeout * HZ;
+	return 0;
+}
+
+static int at91_wdt_stop(struct watchdog_device *wdd)
+{
+	/* The watchdog timer hardware can not be stopped... */
+	return 0;
+}
+
+static int at91_wdt_set_timeout(struct watchdog_device *wdd, unsigned int new_timeout)
+{
+	wdd->timeout = new_timeout;
+	return at91_wdt_start(wdd);
+}
+
+static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt)
+{
+	u32 tmp;
+	u32 delta;
+	u32 value;
+	int err;
+	u32 mask = wdt->mr_mask;
+	unsigned long min_heartbeat = 1;
+	unsigned long max_heartbeat;
+	struct device *dev = &pdev->dev;
+
+	tmp = wdt_read(wdt, AT91_WDT_MR);
+	if ((tmp & mask) != (wdt->mr & mask)) {
+		if (tmp == WDT_MR_RESET) {
+			wdt_write(wdt, AT91_WDT_MR, wdt->mr);
+			tmp = wdt_read(wdt, AT91_WDT_MR);
+		}
+	}
+
+	if (tmp & AT91_WDT_WDDIS) {
+		if (wdt->mr & AT91_WDT_WDDIS)
+			return 0;
+		dev_err(dev, "watchdog is disabled\n");
+		return -EINVAL;
+	}
+
+	value = tmp & AT91_WDT_WDV;
+	delta = (tmp & AT91_WDT_WDD) >> 16;
+
+	if (delta < value)
+		min_heartbeat = ticks_to_hz_roundup(value - delta);
+
+	max_heartbeat = ticks_to_hz_rounddown(value);
+	if (!max_heartbeat) {
+		dev_err(dev,
+			"heartbeat is too small for the system to handle it correctly\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Try to reset the watchdog counter 4 or 2 times more often than
+	 * actually requested, to avoid spurious watchdog reset.
+	 * If this is not possible because of the min_heartbeat value, reset
+	 * it at the min_heartbeat period.
+	 */
+	if ((max_heartbeat / 4) >= min_heartbeat)
+		wdt->heartbeat = max_heartbeat / 4;
+	else if ((max_heartbeat / 2) >= min_heartbeat)
+		wdt->heartbeat = max_heartbeat / 2;
+	else
+		wdt->heartbeat = min_heartbeat;
+
+	if (max_heartbeat < min_heartbeat + 4)
+		dev_warn(dev,
+			 "min heartbeat and max heartbeat might be too close for the system to handle it correctly\n");
+
+	if ((tmp & AT91_WDT_WDFIEN) && wdt->irq) {
+		err = request_irq(wdt->irq, wdt_interrupt,
+				  IRQF_SHARED | IRQF_IRQPOLL |
+				  IRQF_NO_SUSPEND,
+				  pdev->name, wdt);
+		if (err)
+			return err;
+	}
+
+	if ((tmp & wdt->mr_mask) != (wdt->mr & wdt->mr_mask))
+		dev_warn(dev,
+			 "watchdog already configured differently (mr = %x expecting %x)\n",
+			 tmp & wdt->mr_mask, wdt->mr & wdt->mr_mask);
+
+	timer_setup(&wdt->timer, at91_ping, 0);
+
+	/*
+	 * Use min_heartbeat the first time to avoid spurious watchdog reset:
+	 * we don't know for how long the watchdog counter is running, and
+	 *  - resetting it right now might trigger a watchdog fault reset
+	 *  - waiting for heartbeat time might lead to a watchdog timeout
+	 *    reset
+	 */
+	mod_timer(&wdt->timer, jiffies + min_heartbeat);
+
+	/* Try to set timeout from device tree first */
+	if (watchdog_init_timeout(&wdt->wdd, 0, dev))
+		watchdog_init_timeout(&wdt->wdd, heartbeat, dev);
+	watchdog_set_nowayout(&wdt->wdd, wdt->nowayout);
+	err = watchdog_register_device(&wdt->wdd);
+	if (err)
+		goto out_stop_timer;
+
+	wdt->next_heartbeat = jiffies + wdt->wdd.timeout * HZ;
+
+	return 0;
+
+out_stop_timer:
+	del_timer(&wdt->timer);
+	return err;
+}
+
+/* ......................................................................... */
+
+static const struct watchdog_info at91_wdt_info = {
+	.identity	= DRV_NAME,
+	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
+						WDIOF_MAGICCLOSE,
+};
+
+static const struct watchdog_ops at91_wdt_ops = {
+	.owner =	THIS_MODULE,
+	.start =	at91_wdt_start,
+	.stop =		at91_wdt_stop,
+	.set_timeout =	at91_wdt_set_timeout,
+};
+
+#if defined(CONFIG_OF)
+static int of_at91wdt_init(struct device_node *np, struct at91wdt *wdt)
+{
+	u32 min = 0;
+	u32 max = WDT_COUNTER_MAX_SECS;
+	const char *tmp;
+
+	/* Get the interrupts property */
+	wdt->irq = irq_of_parse_and_map(np, 0);
+	if (!wdt->irq)
+		dev_warn(wdt->wdd.parent, "failed to get IRQ from DT\n");
+
+	if (!of_property_read_u32_index(np, "atmel,max-heartbeat-sec", 0,
+					&max)) {
+		if (!max || max > WDT_COUNTER_MAX_SECS)
+			max = WDT_COUNTER_MAX_SECS;
+
+		if (!of_property_read_u32_index(np, "atmel,min-heartbeat-sec",
+						0, &min)) {
+			if (min >= max)
+				min = max - 1;
+		}
+	}
+
+	min = secs_to_ticks(min);
+	max = secs_to_ticks(max);
+
+	wdt->mr_mask = 0x3FFFFFFF;
+	wdt->mr = 0;
+	if (!of_property_read_string(np, "atmel,watchdog-type", &tmp) &&
+	    !strcmp(tmp, "software")) {
+		wdt->mr |= AT91_WDT_WDFIEN;
+		wdt->mr_mask &= ~AT91_WDT_WDRPROC;
+	} else {
+		wdt->mr |= AT91_WDT_WDRSTEN;
+	}
+
+	if (!of_property_read_string(np, "atmel,reset-type", &tmp) &&
+	    !strcmp(tmp, "proc"))
+		wdt->mr |= AT91_WDT_WDRPROC;
+
+	if (of_property_read_bool(np, "atmel,disable")) {
+		wdt->mr |= AT91_WDT_WDDIS;
+		wdt->mr_mask &= AT91_WDT_WDDIS;
+	}
+
+	if (of_property_read_bool(np, "atmel,idle-halt"))
+		wdt->mr |= AT91_WDT_WDIDLEHLT;
+
+	if (of_property_read_bool(np, "atmel,dbg-halt"))
+		wdt->mr |= AT91_WDT_WDDBGHLT;
+
+	wdt->mr |= max | ((max - min) << 16);
+
+	return 0;
+}
+#else
+static inline int of_at91wdt_init(struct device_node *np, struct at91wdt *wdt)
+{
+	return 0;
+}
+#endif
+
+static int __init at91wdt_probe(struct platform_device *pdev)
+{
+	int err;
+	struct at91wdt *wdt;
+
+	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
+	if (!wdt)
+		return -ENOMEM;
+
+	wdt->mr = (WDT_HW_TIMEOUT * 256) | AT91_WDT_WDRSTEN | AT91_WDT_WDD |
+		  AT91_WDT_WDDBGHLT | AT91_WDT_WDIDLEHLT;
+	wdt->mr_mask = 0x3FFFFFFF;
+	wdt->nowayout = nowayout;
+	wdt->wdd.parent = &pdev->dev;
+	wdt->wdd.info = &at91_wdt_info;
+	wdt->wdd.ops = &at91_wdt_ops;
+	wdt->wdd.timeout = WDT_HEARTBEAT;
+	wdt->wdd.min_timeout = 1;
+	wdt->wdd.max_timeout = 0xFFFF;
+
+	wdt->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(wdt->base))
+		return PTR_ERR(wdt->base);
+
+	wdt->sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(wdt->sclk))
+		return PTR_ERR(wdt->sclk);
+
+	err = clk_prepare_enable(wdt->sclk);
+	if (err) {
+		dev_err(&pdev->dev, "Could not enable slow clock\n");
+		return err;
+	}
+
+	if (pdev->dev.of_node) {
+		err = of_at91wdt_init(pdev->dev.of_node, wdt);
+		if (err)
+			goto err_clk;
+	}
+
+	err = at91_wdt_init(pdev, wdt);
+	if (err)
+		goto err_clk;
+
+	platform_set_drvdata(pdev, wdt);
+
+	pr_info("enabled (heartbeat=%d sec, nowayout=%d)\n",
+		wdt->wdd.timeout, wdt->nowayout);
+
+	return 0;
+
+err_clk:
+	clk_disable_unprepare(wdt->sclk);
+
+	return err;
+}
+
+static int __exit at91wdt_remove(struct platform_device *pdev)
+{
+	struct at91wdt *wdt = platform_get_drvdata(pdev);
+	watchdog_unregister_device(&wdt->wdd);
+
+	pr_warn("I quit now, hardware will probably reboot!\n");
+	del_timer(&wdt->timer);
+	clk_disable_unprepare(wdt->sclk);
+
+	return 0;
+}
+
+#if defined(CONFIG_OF)
+static const struct of_device_id at91_wdt_dt_ids[] = {
+	{ .compatible = "atmel,at91sam9260-wdt" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, at91_wdt_dt_ids);
+#endif
+
+static struct platform_driver at91wdt_driver = {
+	.remove		= __exit_p(at91wdt_remove),
+	.driver		= {
+		.name	= "at91_wdt",
+		.of_match_table = of_match_ptr(at91_wdt_dt_ids),
+	},
+};
+
+module_platform_driver_probe(at91wdt_driver, at91wdt_probe);
+
+MODULE_AUTHOR("Renaud CERRATO <r.cerrato@til-technologies.fr>");
+MODULE_DESCRIPTION("Watchdog driver for Atmel AT91SAM9x processors");
+MODULE_LICENSE("GPL");