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, 555 insertions, 0 deletions

diff --git a/drivers/iio/accel/stk8ba50.c b/drivers/iio/accel/stk8ba50.c
new file mode 100644
index 000000000..44f6e0fbd
--- /dev/null
+++ b/drivers/iio/accel/stk8ba50.c
@@ -0,0 +1,555 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Sensortek STK8BA50 3-Axis Accelerometer
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * STK8BA50 7-bit I2C address: 0x18.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define STK8BA50_REG_XOUT			0x02
+#define STK8BA50_REG_YOUT			0x04
+#define STK8BA50_REG_ZOUT			0x06
+#define STK8BA50_REG_RANGE			0x0F
+#define STK8BA50_REG_BWSEL			0x10
+#define STK8BA50_REG_POWMODE			0x11
+#define STK8BA50_REG_SWRST			0x14
+#define STK8BA50_REG_INTEN2			0x17
+#define STK8BA50_REG_INTMAP2			0x1A
+
+#define STK8BA50_MODE_NORMAL			0
+#define STK8BA50_MODE_SUSPEND			1
+#define STK8BA50_MODE_POWERBIT			BIT(7)
+#define STK8BA50_DATA_SHIFT			6
+#define STK8BA50_RESET_CMD			0xB6
+#define STK8BA50_SR_1792HZ_IDX			7
+#define STK8BA50_DREADY_INT_MASK		0x10
+#define STK8BA50_DREADY_INT_MAP			0x81
+#define STK8BA50_ALL_CHANNEL_MASK		7
+#define STK8BA50_ALL_CHANNEL_SIZE		6
+
+#define STK8BA50_DRIVER_NAME			"stk8ba50"
+#define STK8BA50_IRQ_NAME			"stk8ba50_event"
+
+#define STK8BA50_SCALE_AVAIL			"0.0384 0.0767 0.1534 0.3069"
+
+/*
+ * The accelerometer has four measurement ranges:
+ * +/-2g; +/-4g; +/-8g; +/-16g
+ *
+ * Acceleration values are 10-bit, 2's complement.
+ * Scales are calculated as following:
+ *
+ * scale1 = (2 + 2) * 9.81 / (2^10 - 1)   = 0.0384
+ * scale2 = (4 + 4) * 9.81 / (2^10 - 1)   = 0.0767
+ * etc.
+ *
+ * Scales are stored in this format:
+ * { <register value>, <scale value> }
+ *
+ * Locally, the range is stored as a table index.
+ */
+static const struct {
+	u8 reg_val;
+	u32 scale_val;
+} stk8ba50_scale_table[] = {
+	{3, 38400}, {5, 76700}, {8, 153400}, {12, 306900}
+};
+
+/* Sample rates are stored as { <register value>, <Hz value> } */
+static const struct {
+	u8 reg_val;
+	u16 samp_freq;
+} stk8ba50_samp_freq_table[] = {
+	{0x08, 14},  {0x09, 25},  {0x0A, 56},  {0x0B, 112},
+	{0x0C, 224}, {0x0D, 448}, {0x0E, 896}, {0x0F, 1792}
+};
+
+/* Used to map scan mask bits to their corresponding channel register. */
+static const int stk8ba50_channel_table[] = {
+	STK8BA50_REG_XOUT,
+	STK8BA50_REG_YOUT,
+	STK8BA50_REG_ZOUT
+};
+
+struct stk8ba50_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	int range;
+	u8 sample_rate_idx;
+	struct iio_trigger *dready_trig;
+	bool dready_trigger_on;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		s16 chans[3];
+		s64 timetamp __aligned(8);
+	} scan;
+};
+
+#define STK8BA50_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		\
+				    BIT(IIO_CHAN_INFO_SAMP_FREQ),	\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 10,						\
+		.storagebits = 16,					\
+		.shift = STK8BA50_DATA_SHIFT,				\
+		.endianness = IIO_CPU,					\
+	},								\
+}
+
+static const struct iio_chan_spec stk8ba50_channels[] = {
+	STK8BA50_ACCEL_CHANNEL(0, STK8BA50_REG_XOUT, X),
+	STK8BA50_ACCEL_CHANNEL(1, STK8BA50_REG_YOUT, Y),
+	STK8BA50_ACCEL_CHANNEL(2, STK8BA50_REG_ZOUT, Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static IIO_CONST_ATTR(in_accel_scale_available, STK8BA50_SCALE_AVAIL);
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("14 25 56 112 224 448 896 1792");
+
+static struct attribute *stk8ba50_attributes[] = {
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group stk8ba50_attribute_group = {
+	.attrs = stk8ba50_attributes
+};
+
+static int stk8ba50_read_accel(struct stk8ba50_data *data, u8 reg)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_read_word_data(client, reg);
+	if (ret < 0) {
+		dev_err(&client->dev, "register read failed\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int stk8ba50_data_rdy_trigger_set_state(struct iio_trigger *trig,
+					       bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (state)
+		ret = i2c_smbus_write_byte_data(data->client,
+			STK8BA50_REG_INTEN2, STK8BA50_DREADY_INT_MASK);
+	else
+		ret = i2c_smbus_write_byte_data(data->client,
+			STK8BA50_REG_INTEN2, 0x00);
+
+	if (ret < 0)
+		dev_err(&data->client->dev, "failed to set trigger state\n");
+	else
+		data->dready_trigger_on = state;
+
+	return ret;
+}
+
+static const struct iio_trigger_ops stk8ba50_trigger_ops = {
+	.set_trigger_state = stk8ba50_data_rdy_trigger_set_state,
+};
+
+static int stk8ba50_set_power(struct stk8ba50_data *data, bool mode)
+{
+	int ret;
+	u8 masked_reg;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_read_byte_data(client, STK8BA50_REG_POWMODE);
+	if (ret < 0)
+		goto exit_err;
+
+	if (mode)
+		masked_reg = ret | STK8BA50_MODE_POWERBIT;
+	else
+		masked_reg = ret & (~STK8BA50_MODE_POWERBIT);
+
+	ret = i2c_smbus_write_byte_data(client, STK8BA50_REG_POWMODE,
+					masked_reg);
+	if (ret < 0)
+		goto exit_err;
+
+	return ret;
+
+exit_err:
+	dev_err(&client->dev, "failed to change sensor mode\n");
+	return ret;
+}
+
+static int stk8ba50_read_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int *val, int *val2, long mask)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+		mutex_lock(&data->lock);
+		ret = stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+		if (ret < 0) {
+			mutex_unlock(&data->lock);
+			return -EINVAL;
+		}
+		ret = stk8ba50_read_accel(data, chan->address);
+		if (ret < 0) {
+			stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+			mutex_unlock(&data->lock);
+			return -EINVAL;
+		}
+		*val = sign_extend32(ret >> chan->scan_type.shift,
+				     chan->scan_type.realbits - 1);
+		stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+		mutex_unlock(&data->lock);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = stk8ba50_scale_table[data->range].scale_val;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = stk8ba50_samp_freq_table
+				[data->sample_rate_idx].samp_freq;
+		*val2 = 0;
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int stk8ba50_write_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int val, int val2, long mask)
+{
+	int ret;
+	int i;
+	int index = -1;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val != 0)
+			return -EINVAL;
+
+		for (i = 0; i < ARRAY_SIZE(stk8ba50_scale_table); i++)
+			if (val2 == stk8ba50_scale_table[i].scale_val) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		ret = i2c_smbus_write_byte_data(data->client,
+				STK8BA50_REG_RANGE,
+				stk8ba50_scale_table[index].reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"failed to set measurement range\n");
+		else
+			data->range = index;
+
+		return ret;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		for (i = 0; i < ARRAY_SIZE(stk8ba50_samp_freq_table); i++)
+			if (val == stk8ba50_samp_freq_table[i].samp_freq) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		ret = i2c_smbus_write_byte_data(data->client,
+				STK8BA50_REG_BWSEL,
+				stk8ba50_samp_freq_table[index].reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"failed to set sampling rate\n");
+		else
+			data->sample_rate_idx = index;
+
+		return ret;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info stk8ba50_info = {
+	.read_raw		= stk8ba50_read_raw,
+	.write_raw		= stk8ba50_write_raw,
+	.attrs			= &stk8ba50_attribute_group,
+};
+
+static irqreturn_t stk8ba50_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int bit, ret, i = 0;
+
+	mutex_lock(&data->lock);
+	/*
+	 * Do a bulk read if all channels are requested,
+	 * from 0x02 (XOUT1) to 0x07 (ZOUT2)
+	 */
+	if (*(indio_dev->active_scan_mask) == STK8BA50_ALL_CHANNEL_MASK) {
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+						    STK8BA50_REG_XOUT,
+						    STK8BA50_ALL_CHANNEL_SIZE,
+						    (u8 *)data->scan.chans);
+		if (ret < STK8BA50_ALL_CHANNEL_SIZE) {
+			dev_err(&data->client->dev, "register read failed\n");
+			goto err;
+		}
+	} else {
+		for_each_set_bit(bit, indio_dev->active_scan_mask,
+				 indio_dev->masklength) {
+			ret = stk8ba50_read_accel(data,
+						  stk8ba50_channel_table[bit]);
+			if (ret < 0)
+				goto err;
+
+			data->scan.chans[i++] = ret;
+		}
+	}
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
+err:
+	mutex_unlock(&data->lock);
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t stk8ba50_data_rdy_trig_poll(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	if (data->dready_trigger_on)
+		iio_trigger_poll(data->dready_trig);
+
+	return IRQ_HANDLED;
+}
+
+static int stk8ba50_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+}
+
+static int stk8ba50_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+static const struct iio_buffer_setup_ops stk8ba50_buffer_setup_ops = {
+	.preenable   = stk8ba50_buffer_preenable,
+	.postdisable = stk8ba50_buffer_postdisable,
+};
+
+static int stk8ba50_probe(struct i2c_client *client)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct stk8ba50_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+	mutex_init(&data->lock);
+
+	indio_dev->info = &stk8ba50_info;
+	indio_dev->name = STK8BA50_DRIVER_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = stk8ba50_channels;
+	indio_dev->num_channels = ARRAY_SIZE(stk8ba50_channels);
+
+	/* Reset all registers on startup */
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_SWRST, STK8BA50_RESET_CMD);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to reset sensor\n");
+		goto err_power_off;
+	}
+
+	/* The default range is +/-2g */
+	data->range = 0;
+
+	/* The default sampling rate is 1792 Hz (maximum) */
+	data->sample_rate_idx = STK8BA50_SR_1792HZ_IDX;
+
+	/* Set up interrupts */
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_INTEN2, STK8BA50_DREADY_INT_MASK);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to set up interrupts\n");
+		goto err_power_off;
+	}
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_INTMAP2, STK8BA50_DREADY_INT_MAP);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to set up interrupts\n");
+		goto err_power_off;
+	}
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						stk8ba50_data_rdy_trig_poll,
+						NULL,
+						IRQF_TRIGGER_RISING |
+						IRQF_ONESHOT,
+						STK8BA50_IRQ_NAME,
+						indio_dev);
+		if (ret < 0) {
+			dev_err(&client->dev, "request irq %d failed\n",
+				client->irq);
+			goto err_power_off;
+		}
+
+		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+							   "%s-dev%d",
+							   indio_dev->name,
+							   iio_device_id(indio_dev));
+		if (!data->dready_trig) {
+			ret = -ENOMEM;
+			goto err_power_off;
+		}
+
+		data->dready_trig->ops = &stk8ba50_trigger_ops;
+		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+		ret = iio_trigger_register(data->dready_trig);
+		if (ret) {
+			dev_err(&client->dev, "iio trigger register failed\n");
+			goto err_power_off;
+		}
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 iio_pollfunc_store_time,
+					 stk8ba50_trigger_handler,
+					 &stk8ba50_buffer_setup_ops);
+	if (ret < 0) {
+		dev_err(&client->dev, "iio triggered buffer setup failed\n");
+		goto err_trigger_unregister;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		goto err_buffer_cleanup;
+	}
+
+	return ret;
+
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+err_power_off:
+	stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+	return ret;
+}
+
+static void stk8ba50_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+
+	stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+static int stk8ba50_suspend(struct device *dev)
+{
+	struct stk8ba50_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+static int stk8ba50_resume(struct device *dev)
+{
+	struct stk8ba50_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(stk8ba50_pm_ops, stk8ba50_suspend,
+				stk8ba50_resume);
+
+static const struct i2c_device_id stk8ba50_i2c_id[] = {
+	{"stk8ba50", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, stk8ba50_i2c_id);
+
+static const struct acpi_device_id stk8ba50_acpi_id[] = {
+	{"STK8BA50", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk8ba50_acpi_id);
+
+static struct i2c_driver stk8ba50_driver = {
+	.driver = {
+		.name = "stk8ba50",
+		.pm = pm_sleep_ptr(&stk8ba50_pm_ops),
+		.acpi_match_table = ACPI_PTR(stk8ba50_acpi_id),
+	},
+	.probe_new =        stk8ba50_probe,
+	.remove =           stk8ba50_remove,
+	.id_table =         stk8ba50_i2c_id,
+};
+
+module_i2c_driver(stk8ba50_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK8BA50 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");