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, 537 insertions, 0 deletions

diff --git a/drivers/iio/chemical/sunrise_co2.c b/drivers/iio/chemical/sunrise_co2.c
new file mode 100644
index 000000000..8440dc0c7
--- /dev/null
+++ b/drivers/iio/chemical/sunrise_co2.c
@@ -0,0 +1,537 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Senseair Sunrise 006-0-0007 CO2 sensor driver.
+ *
+ * Copyright (C) 2021 Jacopo Mondi
+ *
+ * List of features not yet supported by the driver:
+ * - controllable EN pin
+ * - single-shot operations using the nDRY pin.
+ * - ABC/target calibration
+ */
+
+#include <linux/bitops.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/time64.h>
+
+#include <linux/iio/iio.h>
+
+#define DRIVER_NAME "sunrise_co2"
+
+#define SUNRISE_ERROR_STATUS_REG		0x00
+#define SUNRISE_CO2_FILTERED_COMP_REG		0x06
+#define SUNRISE_CHIP_TEMPERATURE_REG		0x08
+#define SUNRISE_CALIBRATION_STATUS_REG		0x81
+#define SUNRISE_CALIBRATION_COMMAND_REG		0x82
+#define SUNRISE_CALIBRATION_FACTORY_CMD		0x7c02
+#define SUNRISE_CALIBRATION_BACKGROUND_CMD	0x7c06
+/*
+ * The calibration timeout is not characterized in the datasheet.
+ * Use 30 seconds as a reasonable upper limit.
+ */
+#define SUNRISE_CALIBRATION_TIMEOUT_US		(30 * USEC_PER_SEC)
+
+struct sunrise_dev {
+	struct i2c_client *client;
+	struct regmap *regmap;
+	/* Protects access to IIO attributes. */
+	struct mutex lock;
+	bool ignore_nak;
+};
+
+/* Custom regmap read/write operations: perform unlocked access to the i2c bus. */
+
+static int sunrise_regmap_read(void *context, const void *reg_buf,
+			       size_t reg_size, void *val_buf, size_t val_size)
+{
+	struct i2c_client *client = context;
+	struct sunrise_dev *sunrise = i2c_get_clientdata(client);
+	union i2c_smbus_data data;
+	int ret;
+
+	if (reg_size != 1 || !val_size)
+		return -EINVAL;
+
+	memset(&data, 0, sizeof(data));
+	data.block[0] = val_size;
+
+	/*
+	 * Wake up sensor by sending sensor address: START, sensor address,
+	 * STOP. Sensor will not ACK this byte.
+	 *
+	 * The chip enters a low power state after 15ms without
+	 * communications or after a complete read/write sequence.
+	 */
+	__i2c_smbus_xfer(client->adapter, client->addr,
+			 sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,
+			 I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data);
+
+	usleep_range(500, 1500);
+
+	ret = __i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+			       I2C_SMBUS_READ, ((u8 *)reg_buf)[0],
+			       I2C_SMBUS_I2C_BLOCK_DATA, &data);
+	if (ret < 0)
+		return ret;
+
+	memcpy(val_buf, &data.block[1], data.block[0]);
+
+	return 0;
+}
+
+static int sunrise_regmap_write(void *context, const void *val_buf, size_t count)
+{
+	struct i2c_client *client = context;
+	struct sunrise_dev *sunrise = i2c_get_clientdata(client);
+	union i2c_smbus_data data;
+
+	/* Discard reg address from values count. */
+	if (!count)
+		return -EINVAL;
+	count--;
+
+	memset(&data, 0, sizeof(data));
+	data.block[0] = count;
+	memcpy(&data.block[1], (u8 *)val_buf + 1, count);
+
+	__i2c_smbus_xfer(client->adapter, client->addr,
+			 sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,
+			 I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data);
+
+	usleep_range(500, 1500);
+
+	return __i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+				I2C_SMBUS_WRITE, ((u8 *)val_buf)[0],
+				I2C_SMBUS_I2C_BLOCK_DATA, &data);
+}
+
+/*
+ * Sunrise i2c read/write operations: lock the i2c segment to avoid losing the
+ * wake up session. Use custom regmap operations that perform unlocked access to
+ * the i2c bus.
+ */
+static int sunrise_read_byte(struct sunrise_dev *sunrise, u8 reg)
+{
+	const struct i2c_client *client = sunrise->client;
+	const struct device *dev = &client->dev;
+	unsigned int val;
+	int ret;
+
+	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	ret = regmap_read(sunrise->regmap, reg, &val);
+	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	if (ret) {
+		dev_err(dev, "Read byte failed: reg 0x%02x (%d)\n", reg, ret);
+		return ret;
+	}
+
+	return val;
+}
+
+static int sunrise_read_word(struct sunrise_dev *sunrise, u8 reg, u16 *val)
+{
+	const struct i2c_client *client = sunrise->client;
+	const struct device *dev = &client->dev;
+	__be16 be_val;
+	int ret;
+
+	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	ret = regmap_bulk_read(sunrise->regmap, reg, &be_val, sizeof(be_val));
+	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	if (ret) {
+		dev_err(dev, "Read word failed: reg 0x%02x (%d)\n", reg, ret);
+		return ret;
+	}
+
+	*val = be16_to_cpu(be_val);
+
+	return 0;
+}
+
+static int sunrise_write_byte(struct sunrise_dev *sunrise, u8 reg, u8 val)
+{
+	const struct i2c_client *client = sunrise->client;
+	const struct device *dev = &client->dev;
+	int ret;
+
+	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	ret = regmap_write(sunrise->regmap, reg, val);
+	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	if (ret)
+		dev_err(dev, "Write byte failed: reg 0x%02x (%d)\n", reg, ret);
+
+	return ret;
+}
+
+static int sunrise_write_word(struct sunrise_dev *sunrise, u8 reg, u16 data)
+{
+	const struct i2c_client *client = sunrise->client;
+	const struct device *dev = &client->dev;
+	__be16 be_data = cpu_to_be16(data);
+	int ret;
+
+	i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	ret = regmap_bulk_write(sunrise->regmap, reg, &be_data, sizeof(be_data));
+	i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+	if (ret)
+		dev_err(dev, "Write word failed: reg 0x%02x (%d)\n", reg, ret);
+
+	return ret;
+}
+
+/* Trigger a calibration cycle. */
+
+enum {
+	SUNRISE_CALIBRATION_FACTORY,
+	SUNRISE_CALIBRATION_BACKGROUND,
+};
+
+static const struct sunrise_calib_data {
+	u16 cmd;
+	u8 bit;
+	const char * const name;
+} calib_data[] = {
+	[SUNRISE_CALIBRATION_FACTORY] = {
+		SUNRISE_CALIBRATION_FACTORY_CMD,
+		BIT(2),
+		"factory_calibration",
+	},
+	[SUNRISE_CALIBRATION_BACKGROUND] = {
+		SUNRISE_CALIBRATION_BACKGROUND_CMD,
+		BIT(5),
+		"background_calibration",
+	},
+};
+
+static int sunrise_calibrate(struct sunrise_dev *sunrise,
+			     const struct sunrise_calib_data *data)
+{
+	unsigned int status;
+	int ret;
+
+	/* Reset the calibration status reg. */
+	ret = sunrise_write_byte(sunrise, SUNRISE_CALIBRATION_STATUS_REG, 0x00);
+	if (ret)
+		return ret;
+
+	/* Write a calibration command and poll the calibration status bit. */
+	ret = sunrise_write_word(sunrise, SUNRISE_CALIBRATION_COMMAND_REG, data->cmd);
+	if (ret)
+		return ret;
+
+	dev_dbg(&sunrise->client->dev, "%s in progress\n", data->name);
+
+	/*
+	 * Calibration takes several seconds, so the sleep time between reads
+	 * can be pretty relaxed.
+	 */
+	return read_poll_timeout(sunrise_read_byte, status, status & data->bit,
+				 200000, SUNRISE_CALIBRATION_TIMEOUT_US, false,
+				 sunrise, SUNRISE_CALIBRATION_STATUS_REG);
+}
+
+static ssize_t sunrise_cal_factory_write(struct iio_dev *iiodev,
+					 uintptr_t private,
+					 const struct iio_chan_spec *chan,
+					 const char *buf, size_t len)
+{
+	struct sunrise_dev *sunrise = iio_priv(iiodev);
+	bool enable;
+	int ret;
+
+	ret = kstrtobool(buf, &enable);
+	if (ret)
+		return ret;
+
+	if (!enable)
+		return len;
+
+	mutex_lock(&sunrise->lock);
+	ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_FACTORY]);
+	mutex_unlock(&sunrise->lock);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static ssize_t sunrise_cal_background_write(struct iio_dev *iiodev,
+					    uintptr_t private,
+					    const struct iio_chan_spec *chan,
+					    const char *buf, size_t len)
+{
+	struct sunrise_dev *sunrise = iio_priv(iiodev);
+	bool enable;
+	int ret;
+
+	ret = kstrtobool(buf, &enable);
+	if (ret)
+		return ret;
+
+	if (!enable)
+		return len;
+
+	mutex_lock(&sunrise->lock);
+	ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_BACKGROUND]);
+	mutex_unlock(&sunrise->lock);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+ /* Enumerate and retrieve the chip error status. */
+enum {
+	SUNRISE_ERROR_FATAL,
+	SUNRISE_ERROR_I2C,
+	SUNRISE_ERROR_ALGORITHM,
+	SUNRISE_ERROR_CALIBRATION,
+	SUNRISE_ERROR_SELF_DIAGNOSTIC,
+	SUNRISE_ERROR_OUT_OF_RANGE,
+	SUNRISE_ERROR_MEMORY,
+	SUNRISE_ERROR_NO_MEASUREMENT,
+	SUNRISE_ERROR_LOW_VOLTAGE,
+	SUNRISE_ERROR_MEASUREMENT_TIMEOUT,
+};
+
+static const char * const sunrise_error_statuses[] = {
+	[SUNRISE_ERROR_FATAL] = "error_fatal",
+	[SUNRISE_ERROR_I2C] = "error_i2c",
+	[SUNRISE_ERROR_ALGORITHM] = "error_algorithm",
+	[SUNRISE_ERROR_CALIBRATION] = "error_calibration",
+	[SUNRISE_ERROR_SELF_DIAGNOSTIC] = "error_self_diagnostic",
+	[SUNRISE_ERROR_OUT_OF_RANGE] = "error_out_of_range",
+	[SUNRISE_ERROR_MEMORY] = "error_memory",
+	[SUNRISE_ERROR_NO_MEASUREMENT] = "error_no_measurement",
+	[SUNRISE_ERROR_LOW_VOLTAGE] = "error_low_voltage",
+	[SUNRISE_ERROR_MEASUREMENT_TIMEOUT] = "error_measurement_timeout",
+};
+
+static const struct iio_enum sunrise_error_statuses_enum = {
+	.items = sunrise_error_statuses,
+	.num_items = ARRAY_SIZE(sunrise_error_statuses),
+};
+
+static ssize_t sunrise_error_status_read(struct iio_dev *iiodev,
+					 uintptr_t private,
+					 const struct iio_chan_spec *chan,
+					 char *buf)
+{
+	struct sunrise_dev *sunrise = iio_priv(iiodev);
+	unsigned long errors;
+	ssize_t len = 0;
+	u16 value;
+	int ret;
+	u8 i;
+
+	mutex_lock(&sunrise->lock);
+	ret = sunrise_read_word(sunrise, SUNRISE_ERROR_STATUS_REG, &value);
+	if (ret) {
+		mutex_unlock(&sunrise->lock);
+		return ret;
+	}
+
+	errors = value;
+	for_each_set_bit(i, &errors, ARRAY_SIZE(sunrise_error_statuses))
+		len += sysfs_emit_at(buf, len, "%s ", sunrise_error_statuses[i]);
+
+	if (len)
+		buf[len - 1] = '\n';
+
+	mutex_unlock(&sunrise->lock);
+
+	return len;
+}
+
+static const struct iio_chan_spec_ext_info sunrise_concentration_ext_info[] = {
+	/* Calibration triggers. */
+	{
+		.name = "calibration_factory",
+		.write = sunrise_cal_factory_write,
+		.shared = IIO_SEPARATE,
+	},
+	{
+		.name = "calibration_background",
+		.write = sunrise_cal_background_write,
+		.shared = IIO_SEPARATE,
+	},
+
+	/* Error statuses. */
+	{
+		.name = "error_status",
+		.read = sunrise_error_status_read,
+		.shared = IIO_SHARED_BY_ALL,
+	},
+	{
+		.name = "error_status_available",
+		.shared = IIO_SHARED_BY_ALL,
+		.read = iio_enum_available_read,
+		.private = (uintptr_t)&sunrise_error_statuses_enum,
+	},
+	{}
+};
+
+static const struct iio_chan_spec sunrise_channels[] = {
+	{
+		.type = IIO_CONCENTRATION,
+		.modified = 1,
+		.channel2 = IIO_MOD_CO2,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.ext_info = sunrise_concentration_ext_info,
+	},
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+	},
+};
+
+static int sunrise_read_raw(struct iio_dev *iio_dev,
+			    const struct iio_chan_spec *chan,
+			    int *val, int *val2, long mask)
+{
+	struct sunrise_dev *sunrise = iio_priv(iio_dev);
+	u16 value;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_CONCENTRATION:
+			mutex_lock(&sunrise->lock);
+			ret = sunrise_read_word(sunrise, SUNRISE_CO2_FILTERED_COMP_REG,
+						&value);
+			mutex_unlock(&sunrise->lock);
+
+			if (ret)
+				return ret;
+
+			*val = value;
+			return IIO_VAL_INT;
+
+		case IIO_TEMP:
+			mutex_lock(&sunrise->lock);
+			ret = sunrise_read_word(sunrise, SUNRISE_CHIP_TEMPERATURE_REG,
+						&value);
+			mutex_unlock(&sunrise->lock);
+
+			if (ret)
+				return ret;
+
+			*val = value;
+			return IIO_VAL_INT;
+
+		default:
+			return -EINVAL;
+		}
+
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_CONCENTRATION:
+			/*
+			 * 1 / 10^4 to comply with IIO scale for CO2
+			 * (percentage). The chip CO2 reading range is [400 -
+			 * 5000] ppm which corresponds to [0,004 - 0,5] %.
+			 */
+			*val = 1;
+			*val2 = 10000;
+			return IIO_VAL_FRACTIONAL;
+
+		case IIO_TEMP:
+			/* x10 to comply with IIO scale (millidegrees celsius). */
+			*val = 10;
+			return IIO_VAL_INT;
+
+		default:
+			return -EINVAL;
+		}
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info sunrise_info = {
+	.read_raw = sunrise_read_raw,
+};
+
+static const struct regmap_bus sunrise_regmap_bus = {
+	.read = sunrise_regmap_read,
+	.write = sunrise_regmap_write,
+};
+
+static const struct regmap_config sunrise_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int sunrise_probe(struct i2c_client *client)
+{
+	struct sunrise_dev *sunrise;
+	struct iio_dev *iio_dev;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+						      I2C_FUNC_SMBUS_BLOCK_DATA)) {
+		dev_err(&client->dev,
+			"Adapter does not support required functionalities\n");
+		return -EOPNOTSUPP;
+	}
+
+	iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*sunrise));
+	if (!iio_dev)
+		return -ENOMEM;
+
+	sunrise = iio_priv(iio_dev);
+	sunrise->client = client;
+	mutex_init(&sunrise->lock);
+
+	i2c_set_clientdata(client, sunrise);
+
+	sunrise->regmap = devm_regmap_init(&client->dev, &sunrise_regmap_bus,
+					   client, &sunrise_regmap_config);
+	if (IS_ERR(sunrise->regmap)) {
+		dev_err(&client->dev, "Failed to initialize regmap\n");
+		return PTR_ERR(sunrise->regmap);
+	}
+
+	/*
+	 * The chip nacks the wake up message. If the adapter does not support
+	 * protocol mangling do not set the I2C_M_IGNORE_NAK flag at the expense
+	 * of possible cruft in the logs.
+	 */
+	if (i2c_check_functionality(client->adapter, I2C_FUNC_PROTOCOL_MANGLING))
+		sunrise->ignore_nak = true;
+
+	iio_dev->info = &sunrise_info;
+	iio_dev->name = DRIVER_NAME;
+	iio_dev->channels = sunrise_channels;
+	iio_dev->num_channels = ARRAY_SIZE(sunrise_channels);
+	iio_dev->modes = INDIO_DIRECT_MODE;
+
+	return devm_iio_device_register(&client->dev, iio_dev);
+}
+
+static const struct of_device_id sunrise_of_match[] = {
+	{ .compatible = "senseair,sunrise-006-0-0007" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, sunrise_of_match);
+
+static struct i2c_driver sunrise_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.of_match_table = sunrise_of_match,
+	},
+	.probe_new = sunrise_probe,
+};
+module_i2c_driver(sunrise_driver);
+
+MODULE_AUTHOR("Jacopo Mondi <jacopo@jmondi.org>");
+MODULE_DESCRIPTION("Senseair Sunrise 006-0-0007 CO2 sensor IIO driver");
+MODULE_LICENSE("GPL v2");