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, 544 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c
new file mode 100644
index 000000000..4a6ff54d8
--- /dev/null
+++ b/drivers/i2c/busses/i2c-iop3xx.c
@@ -0,0 +1,544 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* ------------------------------------------------------------------------- */
+/* i2c-iop3xx.c i2c driver algorithms for Intel XScale IOP3xx & IXP46x       */
+/* ------------------------------------------------------------------------- */
+/* Copyright (C) 2003 Peter Milne, D-TACQ Solutions Ltd
+ *                    <Peter dot Milne at D hyphen TACQ dot com>
+ *
+ * With acknowledgements to i2c-algo-ibm_ocp.c by
+ * Ian DaSilva, MontaVista Software, Inc. idasilva@mvista.com
+ *
+ * And i2c-algo-pcf.c, which was created by Simon G. Vogl and Hans Berglund:
+ *
+ * Copyright (C) 1995-1997 Simon G. Vogl, 1998-2000 Hans Berglund
+ *
+ * And which acknowledged Kyösti Mälkki <kmalkki@cc.hut.fi>,
+ * Frodo Looijaard <frodol@dds.nl>, Martin Bailey<mbailey@littlefeet-inc.com>
+ *
+ * Major cleanup by Deepak Saxena <dsaxena@plexity.net>, 01/2005:
+ *
+ * - Use driver model to pass per-chip info instead of hardcoding and #ifdefs
+ * - Use ioremap/__raw_readl/__raw_writel instead of direct dereference
+ * - Make it work with IXP46x chips
+ * - Cleanup function names, coding style, etc
+ *
+ * - writing to slave address causes latchup on iop331.
+ *	fix: driver refuses to address self.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/gpio/consumer.h>
+
+#include "i2c-iop3xx.h"
+
+/* global unit counter */
+static int i2c_id;
+
+static inline unsigned char
+iic_cook_addr(struct i2c_msg *msg)
+{
+	unsigned char addr;
+
+	addr = i2c_8bit_addr_from_msg(msg);
+
+	return addr;
+}
+
+static void
+iop3xx_i2c_reset(struct i2c_algo_iop3xx_data *iop3xx_adap)
+{
+	/* Follows devman 9.3 */
+	__raw_writel(IOP3XX_ICR_UNIT_RESET, iop3xx_adap->ioaddr + CR_OFFSET);
+	__raw_writel(IOP3XX_ISR_CLEARBITS, iop3xx_adap->ioaddr + SR_OFFSET);
+	__raw_writel(0, iop3xx_adap->ioaddr + CR_OFFSET);
+}
+
+static void
+iop3xx_i2c_enable(struct i2c_algo_iop3xx_data *iop3xx_adap)
+{
+	u32 cr = IOP3XX_ICR_GCD | IOP3XX_ICR_SCLEN | IOP3XX_ICR_UE;
+
+	/*
+	 * Every time unit enable is asserted, GPOD needs to be cleared
+	 * on IOP3XX to avoid data corruption on the bus. We use the
+	 * gpiod_set_raw_value() to make sure the 0 hits the hardware
+	 * GPOD register. These descriptors are only passed along to
+	 * the device if this is necessary.
+	 */
+	if (iop3xx_adap->gpio_scl)
+		gpiod_set_raw_value(iop3xx_adap->gpio_scl, 0);
+	if (iop3xx_adap->gpio_sda)
+		gpiod_set_raw_value(iop3xx_adap->gpio_sda, 0);
+
+	/* NB SR bits not same position as CR IE bits :-( */
+	iop3xx_adap->SR_enabled =
+		IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD |
+		IOP3XX_ISR_RXFULL | IOP3XX_ISR_TXEMPTY;
+
+	cr |= IOP3XX_ICR_ALD_IE | IOP3XX_ICR_BERR_IE |
+		IOP3XX_ICR_RXFULL_IE | IOP3XX_ICR_TXEMPTY_IE;
+
+	__raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET);
+}
+
+static void
+iop3xx_i2c_transaction_cleanup(struct i2c_algo_iop3xx_data *iop3xx_adap)
+{
+	unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET);
+
+	cr &= ~(IOP3XX_ICR_MSTART | IOP3XX_ICR_TBYTE |
+		IOP3XX_ICR_MSTOP | IOP3XX_ICR_SCLEN);
+
+	__raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET);
+}
+
+/*
+ * NB: the handler has to clear the source of the interrupt!
+ * Then it passes the SR flags of interest to BH via adap data
+ */
+static irqreturn_t
+iop3xx_i2c_irq_handler(int this_irq, void *dev_id)
+{
+	struct i2c_algo_iop3xx_data *iop3xx_adap = dev_id;
+	u32 sr = __raw_readl(iop3xx_adap->ioaddr + SR_OFFSET);
+
+	if ((sr &= iop3xx_adap->SR_enabled)) {
+		__raw_writel(sr, iop3xx_adap->ioaddr + SR_OFFSET);
+		iop3xx_adap->SR_received |= sr;
+		wake_up_interruptible(&iop3xx_adap->waitq);
+	}
+	return IRQ_HANDLED;
+}
+
+/* check all error conditions, clear them , report most important */
+static int
+iop3xx_i2c_error(u32 sr)
+{
+	int rc = 0;
+
+	if ((sr & IOP3XX_ISR_BERRD)) {
+		if (!rc)
+			rc = -I2C_ERR_BERR;
+	}
+	if ((sr & IOP3XX_ISR_ALD)) {
+		if (!rc)
+			rc = -I2C_ERR_ALD;
+	}
+	return rc;
+}
+
+static inline u32
+iop3xx_i2c_get_srstat(struct i2c_algo_iop3xx_data *iop3xx_adap)
+{
+	unsigned long flags;
+	u32 sr;
+
+	spin_lock_irqsave(&iop3xx_adap->lock, flags);
+	sr = iop3xx_adap->SR_received;
+	iop3xx_adap->SR_received = 0;
+	spin_unlock_irqrestore(&iop3xx_adap->lock, flags);
+
+	return sr;
+}
+
+/*
+ * sleep until interrupted, then recover and analyse the SR
+ * saved by handler
+ */
+typedef int (*compare_func)(unsigned test, unsigned mask);
+/* returns 1 on correct comparison */
+
+static int
+iop3xx_i2c_wait_event(struct i2c_algo_iop3xx_data *iop3xx_adap,
+			  unsigned flags, unsigned *status,
+			  compare_func compare)
+{
+	unsigned sr = 0;
+	int interrupted;
+	int done;
+	int rc = 0;
+
+	do {
+		interrupted = wait_event_interruptible_timeout (
+			iop3xx_adap->waitq,
+			(done = compare(sr = iop3xx_i2c_get_srstat(iop3xx_adap), flags)),
+			1 * HZ
+			);
+		if ((rc = iop3xx_i2c_error(sr)) < 0) {
+			*status = sr;
+			return rc;
+		} else if (!interrupted) {
+			*status = sr;
+			return -ETIMEDOUT;
+		}
+	} while (!done);
+
+	*status = sr;
+
+	return 0;
+}
+
+/*
+ * Concrete compare_funcs
+ */
+static int
+all_bits_clear(unsigned test, unsigned mask)
+{
+	return (test & mask) == 0;
+}
+
+static int
+any_bits_set(unsigned test, unsigned mask)
+{
+	return (test & mask) != 0;
+}
+
+static int
+iop3xx_i2c_wait_tx_done(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status)
+{
+	return iop3xx_i2c_wait_event(
+		iop3xx_adap,
+		IOP3XX_ISR_TXEMPTY | IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD,
+		status, any_bits_set);
+}
+
+static int
+iop3xx_i2c_wait_rx_done(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status)
+{
+	return iop3xx_i2c_wait_event(
+		iop3xx_adap,
+		IOP3XX_ISR_RXFULL | IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD,
+		status,	any_bits_set);
+}
+
+static int
+iop3xx_i2c_wait_idle(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status)
+{
+	return iop3xx_i2c_wait_event(
+		iop3xx_adap, IOP3XX_ISR_UNITBUSY, status, all_bits_clear);
+}
+
+static int
+iop3xx_i2c_send_target_addr(struct i2c_algo_iop3xx_data *iop3xx_adap,
+				struct i2c_msg *msg)
+{
+	unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET);
+	int status;
+	int rc;
+
+	/* avoid writing to my slave address (hangs on 80331),
+	 * forbidden in Intel developer manual
+	 */
+	if (msg->addr == MYSAR) {
+		return -EBUSY;
+	}
+
+	__raw_writel(iic_cook_addr(msg), iop3xx_adap->ioaddr + DBR_OFFSET);
+
+	cr &= ~(IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK);
+	cr |= IOP3XX_ICR_MSTART | IOP3XX_ICR_TBYTE;
+
+	__raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET);
+	rc = iop3xx_i2c_wait_tx_done(iop3xx_adap, &status);
+
+	return rc;
+}
+
+static int
+iop3xx_i2c_write_byte(struct i2c_algo_iop3xx_data *iop3xx_adap, char byte,
+				int stop)
+{
+	unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET);
+	int status;
+	int rc = 0;
+
+	__raw_writel(byte, iop3xx_adap->ioaddr + DBR_OFFSET);
+	cr &= ~IOP3XX_ICR_MSTART;
+	if (stop) {
+		cr |= IOP3XX_ICR_MSTOP;
+	} else {
+		cr &= ~IOP3XX_ICR_MSTOP;
+	}
+	cr |= IOP3XX_ICR_TBYTE;
+	__raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET);
+	rc = iop3xx_i2c_wait_tx_done(iop3xx_adap, &status);
+
+	return rc;
+}
+
+static int
+iop3xx_i2c_read_byte(struct i2c_algo_iop3xx_data *iop3xx_adap, char *byte,
+				int stop)
+{
+	unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET);
+	int status;
+	int rc = 0;
+
+	cr &= ~IOP3XX_ICR_MSTART;
+
+	if (stop) {
+		cr |= IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK;
+	} else {
+		cr &= ~(IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK);
+	}
+	cr |= IOP3XX_ICR_TBYTE;
+	__raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET);
+
+	rc = iop3xx_i2c_wait_rx_done(iop3xx_adap, &status);
+
+	*byte = __raw_readl(iop3xx_adap->ioaddr + DBR_OFFSET);
+
+	return rc;
+}
+
+static int
+iop3xx_i2c_writebytes(struct i2c_adapter *i2c_adap, const char *buf, int count)
+{
+	struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data;
+	int ii;
+	int rc = 0;
+
+	for (ii = 0; rc == 0 && ii != count; ++ii)
+		rc = iop3xx_i2c_write_byte(iop3xx_adap, buf[ii], ii == count-1);
+	return rc;
+}
+
+static int
+iop3xx_i2c_readbytes(struct i2c_adapter *i2c_adap, char *buf, int count)
+{
+	struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data;
+	int ii;
+	int rc = 0;
+
+	for (ii = 0; rc == 0 && ii != count; ++ii)
+		rc = iop3xx_i2c_read_byte(iop3xx_adap, &buf[ii], ii == count-1);
+
+	return rc;
+}
+
+/*
+ * Description:  This function implements combined transactions.  Combined
+ * transactions consist of combinations of reading and writing blocks of data.
+ * FROM THE SAME ADDRESS
+ * Each transfer (i.e. a read or a write) is separated by a repeated start
+ * condition.
+ */
+static int
+iop3xx_i2c_handle_msg(struct i2c_adapter *i2c_adap, struct i2c_msg *pmsg)
+{
+	struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data;
+	int rc;
+
+	rc = iop3xx_i2c_send_target_addr(iop3xx_adap, pmsg);
+	if (rc < 0) {
+		return rc;
+	}
+
+	if ((pmsg->flags&I2C_M_RD)) {
+		return iop3xx_i2c_readbytes(i2c_adap, pmsg->buf, pmsg->len);
+	} else {
+		return iop3xx_i2c_writebytes(i2c_adap, pmsg->buf, pmsg->len);
+	}
+}
+
+/*
+ * master_xfer() - main read/write entry
+ */
+static int
+iop3xx_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
+				int num)
+{
+	struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data;
+	int im = 0;
+	int ret = 0;
+	int status;
+
+	iop3xx_i2c_wait_idle(iop3xx_adap, &status);
+	iop3xx_i2c_reset(iop3xx_adap);
+	iop3xx_i2c_enable(iop3xx_adap);
+
+	for (im = 0; ret == 0 && im != num; im++) {
+		ret = iop3xx_i2c_handle_msg(i2c_adap, &msgs[im]);
+	}
+
+	iop3xx_i2c_transaction_cleanup(iop3xx_adap);
+
+	if (ret)
+		return ret;
+
+	return im;
+}
+
+static u32
+iop3xx_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm iop3xx_i2c_algo = {
+	.master_xfer	= iop3xx_i2c_master_xfer,
+	.functionality	= iop3xx_i2c_func,
+};
+
+static int
+iop3xx_i2c_remove(struct platform_device *pdev)
+{
+	struct i2c_adapter *padapter = platform_get_drvdata(pdev);
+	struct i2c_algo_iop3xx_data *adapter_data =
+		(struct i2c_algo_iop3xx_data *)padapter->algo_data;
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	unsigned long cr = __raw_readl(adapter_data->ioaddr + CR_OFFSET);
+
+	/*
+	 * Disable the actual HW unit
+	 */
+	cr &= ~(IOP3XX_ICR_ALD_IE | IOP3XX_ICR_BERR_IE |
+		IOP3XX_ICR_RXFULL_IE | IOP3XX_ICR_TXEMPTY_IE);
+	__raw_writel(cr, adapter_data->ioaddr + CR_OFFSET);
+
+	iounmap(adapter_data->ioaddr);
+	release_mem_region(res->start, IOP3XX_I2C_IO_SIZE);
+	kfree(adapter_data);
+	kfree(padapter);
+
+	return 0;
+}
+
+static int
+iop3xx_i2c_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	int ret, irq;
+	struct i2c_adapter *new_adapter;
+	struct i2c_algo_iop3xx_data *adapter_data;
+
+	new_adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL);
+	if (!new_adapter) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	adapter_data = kzalloc(sizeof(struct i2c_algo_iop3xx_data), GFP_KERNEL);
+	if (!adapter_data) {
+		ret = -ENOMEM;
+		goto free_adapter;
+	}
+
+	adapter_data->gpio_scl = devm_gpiod_get_optional(&pdev->dev,
+							 "scl",
+							 GPIOD_ASIS);
+	if (IS_ERR(adapter_data->gpio_scl)) {
+		ret = PTR_ERR(adapter_data->gpio_scl);
+		goto free_both;
+	}
+	adapter_data->gpio_sda = devm_gpiod_get_optional(&pdev->dev,
+							 "sda",
+							 GPIOD_ASIS);
+	if (IS_ERR(adapter_data->gpio_sda)) {
+		ret = PTR_ERR(adapter_data->gpio_sda);
+		goto free_both;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		ret = -ENODEV;
+		goto free_both;
+	}
+
+	if (!request_mem_region(res->start, IOP3XX_I2C_IO_SIZE, pdev->name)) {
+		ret = -EBUSY;
+		goto free_both;
+	}
+
+	/* set the adapter enumeration # */
+	adapter_data->id = i2c_id++;
+
+	adapter_data->ioaddr = ioremap(res->start, IOP3XX_I2C_IO_SIZE);
+	if (!adapter_data->ioaddr) {
+		ret = -ENOMEM;
+		goto release_region;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto unmap;
+	}
+	ret = request_irq(irq, iop3xx_i2c_irq_handler, 0,
+				pdev->name, adapter_data);
+
+	if (ret)
+		goto unmap;
+
+	memcpy(new_adapter->name, pdev->name, strlen(pdev->name));
+	new_adapter->owner = THIS_MODULE;
+	new_adapter->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+	new_adapter->dev.parent = &pdev->dev;
+	new_adapter->dev.of_node = pdev->dev.of_node;
+	new_adapter->nr = pdev->id;
+
+	/*
+	 * Default values...should these come in from board code?
+	 */
+	new_adapter->timeout = HZ;
+	new_adapter->algo = &iop3xx_i2c_algo;
+
+	init_waitqueue_head(&adapter_data->waitq);
+	spin_lock_init(&adapter_data->lock);
+
+	iop3xx_i2c_reset(adapter_data);
+	iop3xx_i2c_enable(adapter_data);
+
+	platform_set_drvdata(pdev, new_adapter);
+	new_adapter->algo_data = adapter_data;
+
+	i2c_add_numbered_adapter(new_adapter);
+
+	return 0;
+
+unmap:
+	iounmap(adapter_data->ioaddr);
+
+release_region:
+	release_mem_region(res->start, IOP3XX_I2C_IO_SIZE);
+
+free_both:
+	kfree(adapter_data);
+
+free_adapter:
+	kfree(new_adapter);
+
+out:
+	return ret;
+}
+
+static const struct of_device_id i2c_iop3xx_match[] = {
+	{ .compatible = "intel,iop3xx-i2c", },
+	{ .compatible = "intel,ixp4xx-i2c", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, i2c_iop3xx_match);
+
+static struct platform_driver iop3xx_i2c_driver = {
+	.probe		= iop3xx_i2c_probe,
+	.remove		= iop3xx_i2c_remove,
+	.driver		= {
+		.name	= "IOP3xx-I2C",
+		.of_match_table = i2c_iop3xx_match,
+	},
+};
+
+module_platform_driver(iop3xx_i2c_driver);
+
+MODULE_AUTHOR("D-TACQ Solutions Ltd <www.d-tacq.com>");
+MODULE_DESCRIPTION("IOP3xx iic algorithm and driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:IOP3xx-I2C");