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, 778 insertions, 0 deletions

diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
new file mode 100644
index 000000000..024657bc5
--- /dev/null
+++ b/drivers/iio/chemical/atlas-sensor.c
@@ -0,0 +1,778 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * atlas-sensor.c - Support for Atlas Scientific OEM SM sensors
+ *
+ * Copyright (C) 2015-2019 Konsulko Group
+ * Author: Matt Ranostay <matt.ranostay@konsulko.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/irq_work.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/pm_runtime.h>
+
+#define ATLAS_REGMAP_NAME	"atlas_regmap"
+#define ATLAS_DRV_NAME		"atlas"
+
+#define ATLAS_REG_DEV_TYPE		0x00
+#define ATLAS_REG_DEV_VERSION		0x01
+
+#define ATLAS_REG_INT_CONTROL		0x04
+#define ATLAS_REG_INT_CONTROL_EN	BIT(3)
+
+#define ATLAS_REG_PWR_CONTROL		0x06
+
+#define ATLAS_REG_PH_CALIB_STATUS	0x0d
+#define ATLAS_REG_PH_CALIB_STATUS_MASK	0x07
+#define ATLAS_REG_PH_CALIB_STATUS_LOW	BIT(0)
+#define ATLAS_REG_PH_CALIB_STATUS_MID	BIT(1)
+#define ATLAS_REG_PH_CALIB_STATUS_HIGH	BIT(2)
+
+#define ATLAS_REG_EC_CALIB_STATUS		0x0f
+#define ATLAS_REG_EC_CALIB_STATUS_MASK		0x0f
+#define ATLAS_REG_EC_CALIB_STATUS_DRY		BIT(0)
+#define ATLAS_REG_EC_CALIB_STATUS_SINGLE	BIT(1)
+#define ATLAS_REG_EC_CALIB_STATUS_LOW		BIT(2)
+#define ATLAS_REG_EC_CALIB_STATUS_HIGH		BIT(3)
+
+#define ATLAS_REG_DO_CALIB_STATUS		0x09
+#define ATLAS_REG_DO_CALIB_STATUS_MASK		0x03
+#define ATLAS_REG_DO_CALIB_STATUS_PRESSURE	BIT(0)
+#define ATLAS_REG_DO_CALIB_STATUS_DO		BIT(1)
+
+#define ATLAS_REG_RTD_DATA		0x0e
+
+#define ATLAS_REG_PH_TEMP_DATA		0x0e
+#define ATLAS_REG_PH_DATA		0x16
+
+#define ATLAS_REG_EC_PROBE		0x08
+#define ATLAS_REG_EC_TEMP_DATA		0x10
+#define ATLAS_REG_EC_DATA		0x18
+#define ATLAS_REG_TDS_DATA		0x1c
+#define ATLAS_REG_PSS_DATA		0x20
+
+#define ATLAS_REG_ORP_CALIB_STATUS	0x0d
+#define ATLAS_REG_ORP_DATA		0x0e
+
+#define ATLAS_REG_DO_TEMP_DATA		0x12
+#define ATLAS_REG_DO_DATA		0x22
+
+#define ATLAS_PH_INT_TIME_IN_MS		450
+#define ATLAS_EC_INT_TIME_IN_MS		650
+#define ATLAS_ORP_INT_TIME_IN_MS	450
+#define ATLAS_DO_INT_TIME_IN_MS		450
+#define ATLAS_RTD_INT_TIME_IN_MS	450
+
+enum {
+	ATLAS_PH_SM,
+	ATLAS_EC_SM,
+	ATLAS_ORP_SM,
+	ATLAS_DO_SM,
+	ATLAS_RTD_SM,
+};
+
+struct atlas_data {
+	struct i2c_client *client;
+	struct iio_trigger *trig;
+	struct atlas_device *chip;
+	struct regmap *regmap;
+	struct irq_work work;
+	unsigned int interrupt_enabled;
+	/* 96-bit data + 32-bit pad + 64-bit timestamp */
+	__be32 buffer[6] __aligned(8);
+};
+
+static const struct regmap_config atlas_regmap_config = {
+	.name = ATLAS_REGMAP_NAME,
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int atlas_buffer_num_channels(const struct iio_chan_spec *spec)
+{
+	int idx = 0;
+
+	for (; spec->type != IIO_TIMESTAMP; spec++)
+		idx++;
+
+	return idx;
+};
+
+static const struct iio_chan_spec atlas_ph_channels[] = {
+	{
+		.type = IIO_PH,
+		.address = ATLAS_REG_PH_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 32,
+			.storagebits = 32,
+			.endianness = IIO_BE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+	{
+		.type = IIO_TEMP,
+		.address = ATLAS_REG_PH_TEMP_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.output = 1,
+		.scan_index = -1
+	},
+};
+
+#define ATLAS_CONCENTRATION_CHANNEL(_idx, _addr) \
+	{\
+		.type = IIO_CONCENTRATION, \
+		.indexed = 1, \
+		.channel = _idx, \
+		.address = _addr, \
+		.info_mask_separate = \
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \
+		.scan_index = _idx + 1, \
+		.scan_type = { \
+			.sign = 'u', \
+			.realbits = 32, \
+			.storagebits = 32, \
+			.endianness = IIO_BE, \
+		}, \
+	}
+
+static const struct iio_chan_spec atlas_ec_channels[] = {
+	{
+		.type = IIO_ELECTRICALCONDUCTIVITY,
+		.address = ATLAS_REG_EC_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 32,
+			.storagebits = 32,
+			.endianness = IIO_BE,
+		},
+	},
+	ATLAS_CONCENTRATION_CHANNEL(0, ATLAS_REG_TDS_DATA),
+	ATLAS_CONCENTRATION_CHANNEL(1, ATLAS_REG_PSS_DATA),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+	{
+		.type = IIO_TEMP,
+		.address = ATLAS_REG_EC_TEMP_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.output = 1,
+		.scan_index = -1
+	},
+};
+
+static const struct iio_chan_spec atlas_orp_channels[] = {
+	{
+		.type = IIO_VOLTAGE,
+		.address = ATLAS_REG_ORP_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 's',
+			.realbits = 32,
+			.storagebits = 32,
+			.endianness = IIO_BE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct iio_chan_spec atlas_do_channels[] = {
+	{
+		.type = IIO_CONCENTRATION,
+		.address = ATLAS_REG_DO_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 32,
+			.storagebits = 32,
+			.endianness = IIO_BE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+	{
+		.type = IIO_TEMP,
+		.address = ATLAS_REG_DO_TEMP_DATA,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+		.output = 1,
+		.scan_index = -1
+	},
+};
+
+static const struct iio_chan_spec atlas_rtd_channels[] = {
+	{
+		.type = IIO_TEMP,
+		.address = ATLAS_REG_RTD_DATA,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 's',
+			.realbits = 32,
+			.storagebits = 32,
+			.endianness = IIO_BE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static int atlas_check_ph_calibration(struct atlas_data *data)
+{
+	struct device *dev = &data->client->dev;
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(data->regmap, ATLAS_REG_PH_CALIB_STATUS, &val);
+	if (ret)
+		return ret;
+
+	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MASK)) {
+		dev_warn(dev, "device has not been calibrated\n");
+		return 0;
+	}
+
+	if (!(val & ATLAS_REG_PH_CALIB_STATUS_LOW))
+		dev_warn(dev, "device missing low point calibration\n");
+
+	if (!(val & ATLAS_REG_PH_CALIB_STATUS_MID))
+		dev_warn(dev, "device missing mid point calibration\n");
+
+	if (!(val & ATLAS_REG_PH_CALIB_STATUS_HIGH))
+		dev_warn(dev, "device missing high point calibration\n");
+
+	return 0;
+}
+
+static int atlas_check_ec_calibration(struct atlas_data *data)
+{
+	struct device *dev = &data->client->dev;
+	int ret;
+	unsigned int val;
+	__be16	rval;
+
+	ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &rval, 2);
+	if (ret)
+		return ret;
+
+	val = be16_to_cpu(rval);
+	dev_info(dev, "probe set to K = %d.%.2d", val / 100, val % 100);
+
+	ret = regmap_read(data->regmap, ATLAS_REG_EC_CALIB_STATUS, &val);
+	if (ret)
+		return ret;
+
+	if (!(val & ATLAS_REG_EC_CALIB_STATUS_MASK)) {
+		dev_warn(dev, "device has not been calibrated\n");
+		return 0;
+	}
+
+	if (!(val & ATLAS_REG_EC_CALIB_STATUS_DRY))
+		dev_warn(dev, "device missing dry point calibration\n");
+
+	if (val & ATLAS_REG_EC_CALIB_STATUS_SINGLE) {
+		dev_warn(dev, "device using single point calibration\n");
+	} else {
+		if (!(val & ATLAS_REG_EC_CALIB_STATUS_LOW))
+			dev_warn(dev, "device missing low point calibration\n");
+
+		if (!(val & ATLAS_REG_EC_CALIB_STATUS_HIGH))
+			dev_warn(dev, "device missing high point calibration\n");
+	}
+
+	return 0;
+}
+
+static int atlas_check_orp_calibration(struct atlas_data *data)
+{
+	struct device *dev = &data->client->dev;
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(data->regmap, ATLAS_REG_ORP_CALIB_STATUS, &val);
+	if (ret)
+		return ret;
+
+	if (!val)
+		dev_warn(dev, "device has not been calibrated\n");
+
+	return 0;
+}
+
+static int atlas_check_do_calibration(struct atlas_data *data)
+{
+	struct device *dev = &data->client->dev;
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(data->regmap, ATLAS_REG_DO_CALIB_STATUS, &val);
+	if (ret)
+		return ret;
+
+	if (!(val & ATLAS_REG_DO_CALIB_STATUS_MASK)) {
+		dev_warn(dev, "device has not been calibrated\n");
+		return 0;
+	}
+
+	if (!(val & ATLAS_REG_DO_CALIB_STATUS_PRESSURE))
+		dev_warn(dev, "device missing atmospheric pressure calibration\n");
+
+	if (!(val & ATLAS_REG_DO_CALIB_STATUS_DO))
+		dev_warn(dev, "device missing dissolved oxygen calibration\n");
+
+	return 0;
+}
+
+struct atlas_device {
+	const struct iio_chan_spec *channels;
+	int num_channels;
+	int data_reg;
+
+	int (*calibration)(struct atlas_data *data);
+	int delay;
+};
+
+static struct atlas_device atlas_devices[] = {
+	[ATLAS_PH_SM] = {
+				.channels = atlas_ph_channels,
+				.num_channels = 3,
+				.data_reg = ATLAS_REG_PH_DATA,
+				.calibration = &atlas_check_ph_calibration,
+				.delay = ATLAS_PH_INT_TIME_IN_MS,
+	},
+	[ATLAS_EC_SM] = {
+				.channels = atlas_ec_channels,
+				.num_channels = 5,
+				.data_reg = ATLAS_REG_EC_DATA,
+				.calibration = &atlas_check_ec_calibration,
+				.delay = ATLAS_EC_INT_TIME_IN_MS,
+	},
+	[ATLAS_ORP_SM] = {
+				.channels = atlas_orp_channels,
+				.num_channels = 2,
+				.data_reg = ATLAS_REG_ORP_DATA,
+				.calibration = &atlas_check_orp_calibration,
+				.delay = ATLAS_ORP_INT_TIME_IN_MS,
+	},
+	[ATLAS_DO_SM] = {
+				.channels = atlas_do_channels,
+				.num_channels = 3,
+				.data_reg = ATLAS_REG_DO_DATA,
+				.calibration = &atlas_check_do_calibration,
+				.delay = ATLAS_DO_INT_TIME_IN_MS,
+	},
+	[ATLAS_RTD_SM] = {
+				.channels = atlas_rtd_channels,
+				.num_channels = 2,
+				.data_reg = ATLAS_REG_RTD_DATA,
+				.delay = ATLAS_RTD_INT_TIME_IN_MS,
+	},
+};
+
+static int atlas_set_powermode(struct atlas_data *data, int on)
+{
+	return regmap_write(data->regmap, ATLAS_REG_PWR_CONTROL, on);
+}
+
+static int atlas_set_interrupt(struct atlas_data *data, bool state)
+{
+	if (!data->interrupt_enabled)
+		return 0;
+
+	return regmap_update_bits(data->regmap, ATLAS_REG_INT_CONTROL,
+				  ATLAS_REG_INT_CONTROL_EN,
+				  state ? ATLAS_REG_INT_CONTROL_EN : 0);
+}
+
+static int atlas_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct atlas_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(&data->client->dev);
+	if (ret)
+		return ret;
+
+	return atlas_set_interrupt(data, true);
+}
+
+static int atlas_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct atlas_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = atlas_set_interrupt(data, false);
+	if (ret)
+		return ret;
+
+	pm_runtime_mark_last_busy(&data->client->dev);
+	ret = pm_runtime_put_autosuspend(&data->client->dev);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops atlas_buffer_setup_ops = {
+	.postenable = atlas_buffer_postenable,
+	.predisable = atlas_buffer_predisable,
+};
+
+static void atlas_work_handler(struct irq_work *work)
+{
+	struct atlas_data *data = container_of(work, struct atlas_data, work);
+
+	iio_trigger_poll(data->trig);
+}
+
+static irqreturn_t atlas_trigger_handler(int irq, void *private)
+{
+	struct iio_poll_func *pf = private;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct atlas_data *data = iio_priv(indio_dev);
+	int channels = atlas_buffer_num_channels(data->chip->channels);
+	int ret;
+
+	ret = regmap_bulk_read(data->regmap, data->chip->data_reg,
+			      &data->buffer, sizeof(__be32) * channels);
+
+	if (!ret)
+		iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+				iio_get_time_ns(indio_dev));
+
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t atlas_interrupt_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct atlas_data *data = iio_priv(indio_dev);
+
+	irq_work_queue(&data->work);
+
+	return IRQ_HANDLED;
+}
+
+static int atlas_read_measurement(struct atlas_data *data, int reg, __be32 *val)
+{
+	struct device *dev = &data->client->dev;
+	int suspended = pm_runtime_suspended(dev);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	if (suspended)
+		msleep(data->chip->delay);
+
+	ret = regmap_bulk_read(data->regmap, reg, val, sizeof(*val));
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
+}
+
+static int atlas_read_raw(struct iio_dev *indio_dev,
+			  struct iio_chan_spec const *chan,
+			  int *val, int *val2, long mask)
+{
+	struct atlas_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+	case IIO_CHAN_INFO_RAW: {
+		int ret;
+		__be32 reg;
+
+		switch (chan->type) {
+		case IIO_TEMP:
+			ret = regmap_bulk_read(data->regmap, chan->address,
+					       &reg, sizeof(reg));
+			break;
+		case IIO_PH:
+		case IIO_CONCENTRATION:
+		case IIO_ELECTRICALCONDUCTIVITY:
+		case IIO_VOLTAGE:
+			ret = iio_device_claim_direct_mode(indio_dev);
+			if (ret)
+				return ret;
+
+			ret = atlas_read_measurement(data, chan->address, &reg);
+
+			iio_device_release_direct_mode(indio_dev);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+
+		if (!ret) {
+			*val = be32_to_cpu(reg);
+			ret = IIO_VAL_INT;
+		}
+		return ret;
+	}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_TEMP:
+			*val = 10;
+			return IIO_VAL_INT;
+		case IIO_PH:
+			*val = 1; /* 0.001 */
+			*val2 = 1000;
+			break;
+		case IIO_ELECTRICALCONDUCTIVITY:
+			*val = 1; /* 0.00001 */
+			*val2 = 100000;
+			break;
+		case IIO_CONCENTRATION:
+			*val = 0; /* 0.000000001 */
+			*val2 = 1000;
+			return IIO_VAL_INT_PLUS_NANO;
+		case IIO_VOLTAGE:
+			*val = 1; /* 0.1 */
+			*val2 = 10;
+			break;
+		default:
+			return -EINVAL;
+		}
+		return IIO_VAL_FRACTIONAL;
+	}
+
+	return -EINVAL;
+}
+
+static int atlas_write_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int val, int val2, long mask)
+{
+	struct atlas_data *data = iio_priv(indio_dev);
+	__be32 reg = cpu_to_be32(val / 10);
+
+	if (val2 != 0 || val < 0 || val > 20000)
+		return -EINVAL;
+
+	if (mask != IIO_CHAN_INFO_RAW || chan->type != IIO_TEMP)
+		return -EINVAL;
+
+	return regmap_bulk_write(data->regmap, chan->address,
+				 &reg, sizeof(reg));
+}
+
+static const struct iio_info atlas_info = {
+	.read_raw = atlas_read_raw,
+	.write_raw = atlas_write_raw,
+};
+
+static const struct i2c_device_id atlas_id[] = {
+	{ "atlas-ph-sm", ATLAS_PH_SM },
+	{ "atlas-ec-sm", ATLAS_EC_SM },
+	{ "atlas-orp-sm", ATLAS_ORP_SM },
+	{ "atlas-do-sm", ATLAS_DO_SM },
+	{ "atlas-rtd-sm", ATLAS_RTD_SM },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, atlas_id);
+
+static const struct of_device_id atlas_dt_ids[] = {
+	{ .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
+	{ .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, },
+	{ .compatible = "atlas,orp-sm", .data = (void *)ATLAS_ORP_SM, },
+	{ .compatible = "atlas,do-sm", .data = (void *)ATLAS_DO_SM, },
+	{ .compatible = "atlas,rtd-sm", .data = (void *)ATLAS_RTD_SM, },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, atlas_dt_ids);
+
+static int atlas_probe(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	struct atlas_data *data;
+	struct atlas_device *chip;
+	struct iio_trigger *trig;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	if (!dev_fwnode(&client->dev))
+		chip = &atlas_devices[id->driver_data];
+	else
+		chip = &atlas_devices[(unsigned long)device_get_match_data(&client->dev)];
+
+	indio_dev->info = &atlas_info;
+	indio_dev->name = ATLAS_DRV_NAME;
+	indio_dev->channels = chip->channels;
+	indio_dev->num_channels = chip->num_channels;
+	indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE;
+
+	trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
+				      indio_dev->name, iio_device_id(indio_dev));
+
+	if (!trig)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	data->trig = trig;
+	data->chip = chip;
+	iio_trigger_set_drvdata(trig, indio_dev);
+
+	i2c_set_clientdata(client, indio_dev);
+
+	data->regmap = devm_regmap_init_i2c(client, &atlas_regmap_config);
+	if (IS_ERR(data->regmap)) {
+		dev_err(&client->dev, "regmap initialization failed\n");
+		return PTR_ERR(data->regmap);
+	}
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret)
+		return ret;
+
+	ret = chip->calibration(data);
+	if (ret)
+		return ret;
+
+	ret = iio_trigger_register(trig);
+	if (ret) {
+		dev_err(&client->dev, "failed to register trigger\n");
+		return ret;
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+		&atlas_trigger_handler, &atlas_buffer_setup_ops);
+	if (ret) {
+		dev_err(&client->dev, "cannot setup iio trigger\n");
+		goto unregister_trigger;
+	}
+
+	init_irq_work(&data->work, atlas_work_handler);
+
+	if (client->irq > 0) {
+		/* interrupt pin toggles on new conversion */
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+				NULL, atlas_interrupt_handler,
+				IRQF_TRIGGER_RISING |
+				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				"atlas_irq",
+				indio_dev);
+
+		if (ret)
+			dev_warn(&client->dev,
+				"request irq (%d) failed\n", client->irq);
+		else
+			data->interrupt_enabled = 1;
+	}
+
+	ret = atlas_set_powermode(data, 1);
+	if (ret) {
+		dev_err(&client->dev, "cannot power device on");
+		goto unregister_buffer;
+	}
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev, 2500);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&client->dev, "unable to register device\n");
+		goto unregister_pm;
+	}
+
+	return 0;
+
+unregister_pm:
+	pm_runtime_disable(&client->dev);
+	atlas_set_powermode(data, 0);
+
+unregister_buffer:
+	iio_triggered_buffer_cleanup(indio_dev);
+
+unregister_trigger:
+	iio_trigger_unregister(data->trig);
+
+	return ret;
+}
+
+static void atlas_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct atlas_data *data = iio_priv(indio_dev);
+	int ret;
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+	iio_trigger_unregister(data->trig);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+
+	ret = atlas_set_powermode(data, 0);
+	if (ret)
+		dev_err(&client->dev, "Failed to power down device (%pe)\n",
+			ERR_PTR(ret));
+}
+
+static int atlas_runtime_suspend(struct device *dev)
+{
+	struct atlas_data *data =
+		     iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return atlas_set_powermode(data, 0);
+}
+
+static int atlas_runtime_resume(struct device *dev)
+{
+	struct atlas_data *data =
+		     iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return atlas_set_powermode(data, 1);
+}
+
+static const struct dev_pm_ops atlas_pm_ops = {
+	RUNTIME_PM_OPS(atlas_runtime_suspend, atlas_runtime_resume, NULL)
+};
+
+static struct i2c_driver atlas_driver = {
+	.driver = {
+		.name	= ATLAS_DRV_NAME,
+		.of_match_table	= atlas_dt_ids,
+		.pm	= pm_ptr(&atlas_pm_ops),
+	},
+	.probe_new	= atlas_probe,
+	.remove		= atlas_remove,
+	.id_table	= atlas_id,
+};
+module_i2c_driver(atlas_driver);
+
+MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
+MODULE_DESCRIPTION("Atlas Scientific SM sensors");
+MODULE_LICENSE("GPL");