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, 402 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-kempld.c b/drivers/i2c/busses/i2c-kempld.c
new file mode 100644
index 000000000..cf857cf22
--- /dev/null
+++ b/drivers/i2c/busses/i2c-kempld.c
@@ -0,0 +1,402 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * I2C bus driver for Kontron COM modules
+ *
+ * Copyright (c) 2010-2013 Kontron Europe GmbH
+ * Author: Michael Brunner <michael.brunner@kontron.com>
+ *
+ * The driver is based on the i2c-ocores driver by Peter Korsgaard.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/mfd/kempld.h>
+
+#define KEMPLD_I2C_PRELOW	0x0b
+#define KEMPLD_I2C_PREHIGH	0x0c
+#define KEMPLD_I2C_DATA		0x0e
+
+#define KEMPLD_I2C_CTRL		0x0d
+#define I2C_CTRL_IEN		0x40
+#define I2C_CTRL_EN		0x80
+
+#define KEMPLD_I2C_STAT		0x0f
+#define I2C_STAT_IF		0x01
+#define I2C_STAT_TIP		0x02
+#define I2C_STAT_ARBLOST	0x20
+#define I2C_STAT_BUSY		0x40
+#define I2C_STAT_NACK		0x80
+
+#define KEMPLD_I2C_CMD		0x0f
+#define I2C_CMD_START		0x91
+#define I2C_CMD_STOP		0x41
+#define I2C_CMD_READ		0x21
+#define I2C_CMD_WRITE		0x11
+#define I2C_CMD_READ_ACK	0x21
+#define I2C_CMD_READ_NACK	0x29
+#define I2C_CMD_IACK		0x01
+
+#define KEMPLD_I2C_FREQ_MAX	2700	/* 2.7 mHz */
+#define KEMPLD_I2C_FREQ_STD	100	/* 100 kHz */
+
+enum {
+	STATE_DONE = 0,
+	STATE_INIT,
+	STATE_ADDR,
+	STATE_ADDR10,
+	STATE_START,
+	STATE_WRITE,
+	STATE_READ,
+	STATE_ERROR,
+};
+
+struct kempld_i2c_data {
+	struct device			*dev;
+	struct kempld_device_data	*pld;
+	struct i2c_adapter		adap;
+	struct i2c_msg			*msg;
+	int				pos;
+	int				nmsgs;
+	int				state;
+	bool				was_active;
+};
+
+static unsigned int bus_frequency = KEMPLD_I2C_FREQ_STD;
+module_param(bus_frequency, uint, 0);
+MODULE_PARM_DESC(bus_frequency, "Set I2C bus frequency in kHz (default="
+				__MODULE_STRING(KEMPLD_I2C_FREQ_STD)")");
+
+static int i2c_bus = -1;
+module_param(i2c_bus, int, 0);
+MODULE_PARM_DESC(i2c_bus, "Set I2C bus number (default=-1 for dynamic assignment)");
+
+static bool i2c_gpio_mux;
+module_param(i2c_gpio_mux, bool, 0);
+MODULE_PARM_DESC(i2c_gpio_mux, "Enable I2C port on GPIO out (default=false)");
+
+/*
+ * kempld_get_mutex must be called prior to calling this function.
+ */
+static int kempld_i2c_process(struct kempld_i2c_data *i2c)
+{
+	struct kempld_device_data *pld = i2c->pld;
+	u8 stat = kempld_read8(pld, KEMPLD_I2C_STAT);
+	struct i2c_msg *msg = i2c->msg;
+	u8 addr;
+
+	/* Ready? */
+	if (stat & I2C_STAT_TIP)
+		return -EBUSY;
+
+	if (i2c->state == STATE_DONE || i2c->state == STATE_ERROR) {
+		/* Stop has been sent */
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_IACK);
+		if (i2c->state == STATE_ERROR)
+			return -EIO;
+		return 0;
+	}
+
+	/* Error? */
+	if (stat & I2C_STAT_ARBLOST) {
+		i2c->state = STATE_ERROR;
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_STOP);
+		return -EAGAIN;
+	}
+
+	if (i2c->state == STATE_INIT) {
+		if (stat & I2C_STAT_BUSY)
+			return -EBUSY;
+
+		i2c->state = STATE_ADDR;
+	}
+
+	if (i2c->state == STATE_ADDR) {
+		/* 10 bit address? */
+		if (i2c->msg->flags & I2C_M_TEN) {
+			addr = 0xf0 | ((i2c->msg->addr >> 7) & 0x6);
+			/* Set read bit if necessary */
+			addr |= (i2c->msg->flags & I2C_M_RD) ? 1 : 0;
+			i2c->state = STATE_ADDR10;
+		} else {
+			addr = i2c_8bit_addr_from_msg(i2c->msg);
+			i2c->state = STATE_START;
+		}
+
+		kempld_write8(pld, KEMPLD_I2C_DATA, addr);
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_START);
+
+		return 0;
+	}
+
+	/* Second part of 10 bit addressing */
+	if (i2c->state == STATE_ADDR10) {
+		kempld_write8(pld, KEMPLD_I2C_DATA, i2c->msg->addr & 0xff);
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_WRITE);
+
+		i2c->state = STATE_START;
+		return 0;
+	}
+
+	if (i2c->state == STATE_START || i2c->state == STATE_WRITE) {
+		i2c->state = (msg->flags & I2C_M_RD) ? STATE_READ : STATE_WRITE;
+
+		if (stat & I2C_STAT_NACK) {
+			i2c->state = STATE_ERROR;
+			kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_STOP);
+			return -ENXIO;
+		}
+	} else {
+		msg->buf[i2c->pos++] = kempld_read8(pld, KEMPLD_I2C_DATA);
+	}
+
+	if (i2c->pos >= msg->len) {
+		i2c->nmsgs--;
+		i2c->msg++;
+		i2c->pos = 0;
+		msg = i2c->msg;
+
+		if (i2c->nmsgs) {
+			if (!(msg->flags & I2C_M_NOSTART)) {
+				i2c->state = STATE_ADDR;
+				return 0;
+			} else {
+				i2c->state = (msg->flags & I2C_M_RD)
+					? STATE_READ : STATE_WRITE;
+			}
+		} else {
+			i2c->state = STATE_DONE;
+			kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_STOP);
+			return 0;
+		}
+	}
+
+	if (i2c->state == STATE_READ) {
+		kempld_write8(pld, KEMPLD_I2C_CMD, i2c->pos == (msg->len - 1) ?
+			      I2C_CMD_READ_NACK : I2C_CMD_READ_ACK);
+	} else {
+		kempld_write8(pld, KEMPLD_I2C_DATA, msg->buf[i2c->pos++]);
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_WRITE);
+	}
+
+	return 0;
+}
+
+static int kempld_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
+				int num)
+{
+	struct kempld_i2c_data *i2c = i2c_get_adapdata(adap);
+	struct kempld_device_data *pld = i2c->pld;
+	unsigned long timeout = jiffies + HZ;
+	int ret;
+
+	i2c->msg = msgs;
+	i2c->pos = 0;
+	i2c->nmsgs = num;
+	i2c->state = STATE_INIT;
+
+	/* Handle the transfer */
+	while (time_before(jiffies, timeout)) {
+		kempld_get_mutex(pld);
+		ret = kempld_i2c_process(i2c);
+		kempld_release_mutex(pld);
+
+		if (i2c->state == STATE_DONE || i2c->state == STATE_ERROR)
+			return (i2c->state == STATE_DONE) ? num : ret;
+
+		if (ret == 0)
+			timeout = jiffies + HZ;
+
+		usleep_range(5, 15);
+	}
+
+	i2c->state = STATE_ERROR;
+
+	return -ETIMEDOUT;
+}
+
+/*
+ * kempld_get_mutex must be called prior to calling this function.
+ */
+static void kempld_i2c_device_init(struct kempld_i2c_data *i2c)
+{
+	struct kempld_device_data *pld = i2c->pld;
+	u16 prescale_corr;
+	long prescale;
+	u8 ctrl;
+	u8 stat;
+	u8 cfg;
+
+	/* Make sure the device is disabled */
+	ctrl = kempld_read8(pld, KEMPLD_I2C_CTRL);
+	ctrl &= ~(I2C_CTRL_EN | I2C_CTRL_IEN);
+	kempld_write8(pld, KEMPLD_I2C_CTRL, ctrl);
+
+	if (bus_frequency > KEMPLD_I2C_FREQ_MAX)
+		bus_frequency = KEMPLD_I2C_FREQ_MAX;
+
+	if (pld->info.spec_major == 1)
+		prescale = pld->pld_clock / (bus_frequency * 5) - 1000;
+	else
+		prescale = pld->pld_clock / (bus_frequency * 4) - 3000;
+
+	if (prescale < 0)
+		prescale = 0;
+
+	/* Round to the best matching value */
+	prescale_corr = prescale / 1000;
+	if (prescale % 1000 >= 500)
+		prescale_corr++;
+
+	kempld_write8(pld, KEMPLD_I2C_PRELOW, prescale_corr & 0xff);
+	kempld_write8(pld, KEMPLD_I2C_PREHIGH, prescale_corr >> 8);
+
+	/* Activate I2C bus output on GPIO pins */
+	cfg = kempld_read8(pld, KEMPLD_CFG);
+	if (i2c_gpio_mux)
+		cfg |= KEMPLD_CFG_GPIO_I2C_MUX;
+	else
+		cfg &= ~KEMPLD_CFG_GPIO_I2C_MUX;
+	kempld_write8(pld, KEMPLD_CFG, cfg);
+
+	/* Enable the device */
+	kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_IACK);
+	ctrl |= I2C_CTRL_EN;
+	kempld_write8(pld, KEMPLD_I2C_CTRL, ctrl);
+
+	stat = kempld_read8(pld, KEMPLD_I2C_STAT);
+	if (stat & I2C_STAT_BUSY)
+		kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_STOP);
+}
+
+static u32 kempld_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_10BIT_ADDR | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm kempld_i2c_algorithm = {
+	.master_xfer	= kempld_i2c_xfer,
+	.functionality	= kempld_i2c_func,
+};
+
+static const struct i2c_adapter kempld_i2c_adapter = {
+	.owner		= THIS_MODULE,
+	.name		= "i2c-kempld",
+	.class		= I2C_CLASS_HWMON | I2C_CLASS_SPD |
+			  I2C_CLASS_DEPRECATED,
+	.algo		= &kempld_i2c_algorithm,
+};
+
+static int kempld_i2c_probe(struct platform_device *pdev)
+{
+	struct kempld_device_data *pld = dev_get_drvdata(pdev->dev.parent);
+	struct kempld_i2c_data *i2c;
+	int ret;
+	u8 ctrl;
+
+	i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
+	if (!i2c)
+		return -ENOMEM;
+
+	i2c->pld = pld;
+	i2c->dev = &pdev->dev;
+	i2c->adap = kempld_i2c_adapter;
+	i2c->adap.dev.parent = i2c->dev;
+	ACPI_COMPANION_SET(&i2c->adap.dev, ACPI_COMPANION(&pdev->dev));
+	i2c_set_adapdata(&i2c->adap, i2c);
+	platform_set_drvdata(pdev, i2c);
+
+	kempld_get_mutex(pld);
+	ctrl = kempld_read8(pld, KEMPLD_I2C_CTRL);
+
+	if (ctrl & I2C_CTRL_EN)
+		i2c->was_active = true;
+
+	kempld_i2c_device_init(i2c);
+	kempld_release_mutex(pld);
+
+	/* Add I2C adapter to I2C tree */
+	if (i2c_bus >= -1)
+		i2c->adap.nr = i2c_bus;
+	ret = i2c_add_numbered_adapter(&i2c->adap);
+	if (ret)
+		return ret;
+
+	dev_info(i2c->dev, "I2C bus initialized at %dkHz\n",
+		 bus_frequency);
+
+	return 0;
+}
+
+static int kempld_i2c_remove(struct platform_device *pdev)
+{
+	struct kempld_i2c_data *i2c = platform_get_drvdata(pdev);
+	struct kempld_device_data *pld = i2c->pld;
+	u8 ctrl;
+
+	kempld_get_mutex(pld);
+	/*
+	 * Disable I2C logic if it was not activated before the
+	 * driver loaded
+	 */
+	if (!i2c->was_active) {
+		ctrl = kempld_read8(pld, KEMPLD_I2C_CTRL);
+		ctrl &= ~I2C_CTRL_EN;
+		kempld_write8(pld, KEMPLD_I2C_CTRL, ctrl);
+	}
+	kempld_release_mutex(pld);
+
+	i2c_del_adapter(&i2c->adap);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int kempld_i2c_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct kempld_i2c_data *i2c = platform_get_drvdata(pdev);
+	struct kempld_device_data *pld = i2c->pld;
+	u8 ctrl;
+
+	kempld_get_mutex(pld);
+	ctrl = kempld_read8(pld, KEMPLD_I2C_CTRL);
+	ctrl &= ~I2C_CTRL_EN;
+	kempld_write8(pld, KEMPLD_I2C_CTRL, ctrl);
+	kempld_release_mutex(pld);
+
+	return 0;
+}
+
+static int kempld_i2c_resume(struct platform_device *pdev)
+{
+	struct kempld_i2c_data *i2c = platform_get_drvdata(pdev);
+	struct kempld_device_data *pld = i2c->pld;
+
+	kempld_get_mutex(pld);
+	kempld_i2c_device_init(i2c);
+	kempld_release_mutex(pld);
+
+	return 0;
+}
+#else
+#define kempld_i2c_suspend	NULL
+#define kempld_i2c_resume	NULL
+#endif
+
+static struct platform_driver kempld_i2c_driver = {
+	.driver = {
+		.name = "kempld-i2c",
+	},
+	.probe		= kempld_i2c_probe,
+	.remove		= kempld_i2c_remove,
+	.suspend	= kempld_i2c_suspend,
+	.resume		= kempld_i2c_resume,
+};
+
+module_platform_driver(kempld_i2c_driver);
+
+MODULE_DESCRIPTION("KEM PLD I2C Driver");
+MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:kempld_i2c");