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, 542 insertions, 0 deletions

diff --git a/drivers/watchdog/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
new file mode 100644
index 000000000..d8b77fe10
--- /dev/null
+++ b/drivers/watchdog/sch311x_wdt.c
@@ -0,0 +1,542 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *	sch311x_wdt.c - Driver for the SCH311x Super-I/O chips
+ *			integrated watchdog.
+ *
+ *	(c) Copyright 2008 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ *	Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ *	provide warranty for any of this software. This material is
+ *	provided "AS-IS" and at no charge.
+ */
+
+/*
+ *	Includes, defines, variables, module parameters, ...
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+/* Includes */
+#include <linux/module.h>		/* For module specific items */
+#include <linux/moduleparam.h>		/* For new moduleparam's */
+#include <linux/types.h>		/* For standard types (like size_t) */
+#include <linux/errno.h>		/* For the -ENODEV/... values */
+#include <linux/kernel.h>		/* For printk/... */
+#include <linux/miscdevice.h>		/* For struct miscdevice */
+#include <linux/watchdog.h>		/* For the watchdog specific items */
+#include <linux/init.h>			/* For __init/__exit/... */
+#include <linux/fs.h>			/* For file operations */
+#include <linux/platform_device.h>	/* For platform_driver framework */
+#include <linux/ioport.h>		/* For io-port access */
+#include <linux/spinlock.h>		/* For spin_lock/spin_unlock/... */
+#include <linux/uaccess.h>		/* For copy_to_user/put_user/... */
+#include <linux/io.h>			/* For inb/outb/... */
+
+/* Module and version information */
+#define DRV_NAME	"sch311x_wdt"
+
+/* Runtime registers */
+#define GP60			0x47
+#define WDT_TIME_OUT		0x65
+#define WDT_VAL			0x66
+#define WDT_CFG			0x67
+#define WDT_CTRL		0x68
+
+/* internal variables */
+static unsigned long sch311x_wdt_is_open;
+static char sch311x_wdt_expect_close;
+static struct platform_device *sch311x_wdt_pdev;
+
+static int sch311x_ioports[] = { 0x2e, 0x4e, 0x162e, 0x164e, 0x00 };
+
+static struct {	/* The devices private data */
+	/* the Runtime Register base address */
+	unsigned short runtime_reg;
+	/* The card's boot status */
+	int boot_status;
+	/* the lock for io operations */
+	spinlock_t io_lock;
+} sch311x_wdt_data;
+
+/* Module load parameters */
+static unsigned short force_id;
+module_param(force_id, ushort, 0);
+MODULE_PARM_DESC(force_id, "Override the detected device ID");
+
+#define WATCHDOG_TIMEOUT 60		/* 60 sec default timeout */
+static int timeout = WATCHDOG_TIMEOUT;	/* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,
+	"Watchdog timeout in seconds. 1<= timeout <=15300, default="
+		__MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+
+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) ")");
+
+/*
+ *	Super-IO functions
+ */
+
+static inline void sch311x_sio_enter(int sio_config_port)
+{
+	outb(0x55, sio_config_port);
+}
+
+static inline void sch311x_sio_exit(int sio_config_port)
+{
+	outb(0xaa, sio_config_port);
+}
+
+static inline int sch311x_sio_inb(int sio_config_port, int reg)
+{
+	outb(reg, sio_config_port);
+	return inb(sio_config_port + 1);
+}
+
+static inline void sch311x_sio_outb(int sio_config_port, int reg, int val)
+{
+	outb(reg, sio_config_port);
+	outb(val, sio_config_port + 1);
+}
+
+/*
+ *	Watchdog Operations
+ */
+
+static void sch311x_wdt_set_timeout(int t)
+{
+	unsigned char timeout_unit = 0x80;
+
+	/* When new timeout is bigger then 255 seconds, we will use minutes */
+	if (t > 255) {
+		timeout_unit = 0;
+		t /= 60;
+	}
+
+	/* -- Watchdog Timeout --
+	 * Bit 0-6 (Reserved)
+	 * Bit 7   WDT Time-out Value Units Select
+	 *         (0 = Minutes, 1 = Seconds)
+	 */
+	outb(timeout_unit, sch311x_wdt_data.runtime_reg + WDT_TIME_OUT);
+
+	/* -- Watchdog Timer Time-out Value --
+	 * Bit 0-7 Binary coded units (0=Disabled, 1..255)
+	 */
+	outb(t, sch311x_wdt_data.runtime_reg + WDT_VAL);
+}
+
+static void sch311x_wdt_start(void)
+{
+	unsigned char t;
+
+	spin_lock(&sch311x_wdt_data.io_lock);
+
+	/* set watchdog's timeout */
+	sch311x_wdt_set_timeout(timeout);
+	/* enable the watchdog */
+	/* -- General Purpose I/O Bit 6.0 --
+	 * Bit 0,   In/Out: 0 = Output, 1 = Input
+	 * Bit 1,   Polarity: 0 = No Invert, 1 = Invert
+	 * Bit 2-3, Function select: 00 = GPI/O, 01 = LED1, 11 = WDT,
+	 *                           10 = Either Edge Triggered Intr.4
+	 * Bit 4-6  (Reserved)
+	 * Bit 7,   Output Type: 0 = Push Pull Bit, 1 = Open Drain
+	 */
+	t = inb(sch311x_wdt_data.runtime_reg + GP60);
+	outb((t & ~0x0d) | 0x0c, sch311x_wdt_data.runtime_reg + GP60);
+
+	spin_unlock(&sch311x_wdt_data.io_lock);
+
+}
+
+static void sch311x_wdt_stop(void)
+{
+	unsigned char t;
+
+	spin_lock(&sch311x_wdt_data.io_lock);
+
+	/* stop the watchdog */
+	t = inb(sch311x_wdt_data.runtime_reg + GP60);
+	outb((t & ~0x0d) | 0x01, sch311x_wdt_data.runtime_reg + GP60);
+	/* disable timeout by setting it to 0 */
+	sch311x_wdt_set_timeout(0);
+
+	spin_unlock(&sch311x_wdt_data.io_lock);
+}
+
+static void sch311x_wdt_keepalive(void)
+{
+	spin_lock(&sch311x_wdt_data.io_lock);
+	sch311x_wdt_set_timeout(timeout);
+	spin_unlock(&sch311x_wdt_data.io_lock);
+}
+
+static int sch311x_wdt_set_heartbeat(int t)
+{
+	if (t < 1 || t > (255*60))
+		return -EINVAL;
+
+	/* When new timeout is bigger then 255 seconds,
+	 * we will round up to minutes (with a max of 255) */
+	if (t > 255)
+		t = (((t - 1) / 60) + 1) * 60;
+
+	timeout = t;
+	return 0;
+}
+
+static void sch311x_wdt_get_status(int *status)
+{
+	unsigned char new_status;
+
+	*status = 0;
+
+	spin_lock(&sch311x_wdt_data.io_lock);
+
+	/* -- Watchdog timer control --
+	 * Bit 0   Status Bit: 0 = Timer counting, 1 = Timeout occurred
+	 * Bit 1   Reserved
+	 * Bit 2   Force Timeout: 1 = Forces WD timeout event (self-cleaning)
+	 * Bit 3   P20 Force Timeout enabled:
+	 *          0 = P20 activity does not generate the WD timeout event
+	 *          1 = P20 Allows rising edge of P20, from the keyboard
+	 *              controller, to force the WD timeout event.
+	 * Bit 4-7 Reserved
+	 */
+	new_status = inb(sch311x_wdt_data.runtime_reg + WDT_CTRL);
+	if (new_status & 0x01)
+		*status |= WDIOF_CARDRESET;
+
+	spin_unlock(&sch311x_wdt_data.io_lock);
+}
+
+/*
+ *	/dev/watchdog handling
+ */
+
+static ssize_t sch311x_wdt_write(struct file *file, const char __user *buf,
+						size_t count, loff_t *ppos)
+{
+	if (count) {
+		if (!nowayout) {
+			size_t i;
+
+			sch311x_wdt_expect_close = 0;
+
+			for (i = 0; i != count; i++) {
+				char c;
+				if (get_user(c, buf + i))
+					return -EFAULT;
+				if (c == 'V')
+					sch311x_wdt_expect_close = 42;
+			}
+		}
+		sch311x_wdt_keepalive();
+	}
+	return count;
+}
+
+static long sch311x_wdt_ioctl(struct file *file, unsigned int cmd,
+							unsigned long arg)
+{
+	int status;
+	int new_timeout;
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+	static const struct watchdog_info ident = {
+		.options		= WDIOF_KEEPALIVEPING |
+					  WDIOF_SETTIMEOUT |
+					  WDIOF_MAGICCLOSE,
+		.firmware_version	= 1,
+		.identity		= DRV_NAME,
+	};
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		if (copy_to_user(argp, &ident, sizeof(ident)))
+			return -EFAULT;
+		break;
+
+	case WDIOC_GETSTATUS:
+	{
+		sch311x_wdt_get_status(&status);
+		return put_user(status, p);
+	}
+	case WDIOC_GETBOOTSTATUS:
+		return put_user(sch311x_wdt_data.boot_status, p);
+
+	case WDIOC_SETOPTIONS:
+	{
+		int options, retval = -EINVAL;
+
+		if (get_user(options, p))
+			return -EFAULT;
+		if (options & WDIOS_DISABLECARD) {
+			sch311x_wdt_stop();
+			retval = 0;
+		}
+		if (options & WDIOS_ENABLECARD) {
+			sch311x_wdt_start();
+			retval = 0;
+		}
+		return retval;
+	}
+	case WDIOC_KEEPALIVE:
+		sch311x_wdt_keepalive();
+		break;
+
+	case WDIOC_SETTIMEOUT:
+		if (get_user(new_timeout, p))
+			return -EFAULT;
+		if (sch311x_wdt_set_heartbeat(new_timeout))
+			return -EINVAL;
+		sch311x_wdt_keepalive();
+		fallthrough;
+	case WDIOC_GETTIMEOUT:
+		return put_user(timeout, p);
+	default:
+		return -ENOTTY;
+	}
+	return 0;
+}
+
+static int sch311x_wdt_open(struct inode *inode, struct file *file)
+{
+	if (test_and_set_bit(0, &sch311x_wdt_is_open))
+		return -EBUSY;
+	/*
+	 *	Activate
+	 */
+	sch311x_wdt_start();
+	return stream_open(inode, file);
+}
+
+static int sch311x_wdt_close(struct inode *inode, struct file *file)
+{
+	if (sch311x_wdt_expect_close == 42) {
+		sch311x_wdt_stop();
+	} else {
+		pr_crit("Unexpected close, not stopping watchdog!\n");
+		sch311x_wdt_keepalive();
+	}
+	clear_bit(0, &sch311x_wdt_is_open);
+	sch311x_wdt_expect_close = 0;
+	return 0;
+}
+
+/*
+ *	Kernel Interfaces
+ */
+
+static const struct file_operations sch311x_wdt_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.write		= sch311x_wdt_write,
+	.unlocked_ioctl	= sch311x_wdt_ioctl,
+	.compat_ioctl	= compat_ptr_ioctl,
+	.open		= sch311x_wdt_open,
+	.release	= sch311x_wdt_close,
+};
+
+static struct miscdevice sch311x_wdt_miscdev = {
+	.minor	= WATCHDOG_MINOR,
+	.name	= "watchdog",
+	.fops	= &sch311x_wdt_fops,
+};
+
+/*
+ *	Init & exit routines
+ */
+
+static int sch311x_wdt_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int err;
+
+	spin_lock_init(&sch311x_wdt_data.io_lock);
+
+	if (!request_region(sch311x_wdt_data.runtime_reg + GP60, 1, DRV_NAME)) {
+		dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
+			sch311x_wdt_data.runtime_reg + GP60,
+			sch311x_wdt_data.runtime_reg + GP60);
+		err = -EBUSY;
+		goto exit;
+	}
+
+	if (!request_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4,
+								DRV_NAME)) {
+		dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
+			sch311x_wdt_data.runtime_reg + WDT_TIME_OUT,
+			sch311x_wdt_data.runtime_reg + WDT_CTRL);
+		err = -EBUSY;
+		goto exit_release_region;
+	}
+
+	/* Make sure that the watchdog is not running */
+	sch311x_wdt_stop();
+
+	/* Disable keyboard and mouse interaction and interrupt */
+	/* -- Watchdog timer configuration --
+	 * Bit 0   Reserved
+	 * Bit 1   Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
+	 * Bit 2   Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr
+	 * Bit 3   Reserved
+	 * Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
+	 *            0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
+	 */
+	outb(0, sch311x_wdt_data.runtime_reg + WDT_CFG);
+
+	/* Check that the heartbeat value is within it's range ;
+	 * if not reset to the default */
+	if (sch311x_wdt_set_heartbeat(timeout)) {
+		sch311x_wdt_set_heartbeat(WATCHDOG_TIMEOUT);
+		dev_info(dev, "timeout value must be 1<=x<=15300, using %d\n",
+			timeout);
+	}
+
+	/* Get status at boot */
+	sch311x_wdt_get_status(&sch311x_wdt_data.boot_status);
+
+	sch311x_wdt_miscdev.parent = dev;
+
+	err = misc_register(&sch311x_wdt_miscdev);
+	if (err != 0) {
+		dev_err(dev, "cannot register miscdev on minor=%d (err=%d)\n",
+							WATCHDOG_MINOR, err);
+		goto exit_release_region2;
+	}
+
+	dev_info(dev,
+		"SMSC SCH311x WDT initialized. timeout=%d sec (nowayout=%d)\n",
+		timeout, nowayout);
+
+	return 0;
+
+exit_release_region2:
+	release_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4);
+exit_release_region:
+	release_region(sch311x_wdt_data.runtime_reg + GP60, 1);
+	sch311x_wdt_data.runtime_reg = 0;
+exit:
+	return err;
+}
+
+static int sch311x_wdt_remove(struct platform_device *pdev)
+{
+	/* Stop the timer before we leave */
+	if (!nowayout)
+		sch311x_wdt_stop();
+
+	/* Deregister */
+	misc_deregister(&sch311x_wdt_miscdev);
+	release_region(sch311x_wdt_data.runtime_reg + WDT_TIME_OUT, 4);
+	release_region(sch311x_wdt_data.runtime_reg + GP60, 1);
+	sch311x_wdt_data.runtime_reg = 0;
+	return 0;
+}
+
+static void sch311x_wdt_shutdown(struct platform_device *dev)
+{
+	/* Turn the WDT off if we have a soft shutdown */
+	sch311x_wdt_stop();
+}
+
+static struct platform_driver sch311x_wdt_driver = {
+	.probe		= sch311x_wdt_probe,
+	.remove		= sch311x_wdt_remove,
+	.shutdown	= sch311x_wdt_shutdown,
+	.driver		= {
+		.name = DRV_NAME,
+	},
+};
+
+static int __init sch311x_detect(int sio_config_port, unsigned short *addr)
+{
+	int err = 0, reg;
+	unsigned short base_addr;
+	unsigned char dev_id;
+
+	sch311x_sio_enter(sio_config_port);
+
+	/* Check device ID. We currently know about:
+	 * SCH3112 (0x7c), SCH3114 (0x7d), and SCH3116 (0x7f). */
+	reg = force_id ? force_id : sch311x_sio_inb(sio_config_port, 0x20);
+	if (!(reg == 0x7c || reg == 0x7d || reg == 0x7f)) {
+		err = -ENODEV;
+		goto exit;
+	}
+	dev_id = reg == 0x7c ? 2 : reg == 0x7d ? 4 : 6;
+
+	/* Select logical device A (runtime registers) */
+	sch311x_sio_outb(sio_config_port, 0x07, 0x0a);
+
+	/* Check if Logical Device Register is currently active */
+	if ((sch311x_sio_inb(sio_config_port, 0x30) & 0x01) == 0)
+		pr_info("Seems that LDN 0x0a is not active...\n");
+
+	/* Get the base address of the runtime registers */
+	base_addr = (sch311x_sio_inb(sio_config_port, 0x60) << 8) |
+			   sch311x_sio_inb(sio_config_port, 0x61);
+	if (!base_addr) {
+		pr_err("Base address not set\n");
+		err = -ENODEV;
+		goto exit;
+	}
+	*addr = base_addr;
+
+	pr_info("Found an SMSC SCH311%d chip at 0x%04x\n", dev_id, base_addr);
+
+exit:
+	sch311x_sio_exit(sio_config_port);
+	return err;
+}
+
+static int __init sch311x_wdt_init(void)
+{
+	int err, i, found = 0;
+	unsigned short addr = 0;
+
+	for (i = 0; !found && sch311x_ioports[i]; i++)
+		if (sch311x_detect(sch311x_ioports[i], &addr) == 0)
+			found++;
+
+	if (!found)
+		return -ENODEV;
+
+	sch311x_wdt_data.runtime_reg = addr;
+
+	err = platform_driver_register(&sch311x_wdt_driver);
+	if (err)
+		return err;
+
+	sch311x_wdt_pdev = platform_device_register_simple(DRV_NAME, addr,
+								NULL, 0);
+
+	if (IS_ERR(sch311x_wdt_pdev)) {
+		err = PTR_ERR(sch311x_wdt_pdev);
+		goto unreg_platform_driver;
+	}
+
+	return 0;
+
+unreg_platform_driver:
+	platform_driver_unregister(&sch311x_wdt_driver);
+	return err;
+}
+
+static void __exit sch311x_wdt_exit(void)
+{
+	platform_device_unregister(sch311x_wdt_pdev);
+	platform_driver_unregister(&sch311x_wdt_driver);
+}
+
+module_init(sch311x_wdt_init);
+module_exit(sch311x_wdt_exit);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("SMSC SCH311x WatchDog Timer Driver");
+MODULE_LICENSE("GPL");