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, 681 insertions, 0 deletions

diff --git a/drivers/iio/dac/ad5592r-base.c b/drivers/iio/dac/ad5592r-base.c
new file mode 100644
index 000000000..7a9b5fc1e
--- /dev/null
+++ b/drivers/iio/dac/ad5592r-base.c
@@ -0,0 +1,681 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AD5592R Digital <-> Analog converters driver
+ *
+ * Copyright 2014-2016 Analog Devices Inc.
+ * Author: Paul Cercueil <paul.cercueil@analog.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/property.h>
+
+#include <dt-bindings/iio/adi,ad5592r.h>
+
+#include "ad5592r-base.h"
+
+static int ad5592r_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct ad5592r_state *st = gpiochip_get_data(chip);
+	int ret = 0;
+	u8 val;
+
+	mutex_lock(&st->gpio_lock);
+
+	if (st->gpio_out & BIT(offset))
+		val = st->gpio_val;
+	else
+		ret = st->ops->gpio_read(st, &val);
+
+	mutex_unlock(&st->gpio_lock);
+
+	if (ret < 0)
+		return ret;
+
+	return !!(val & BIT(offset));
+}
+
+static void ad5592r_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct ad5592r_state *st = gpiochip_get_data(chip);
+
+	mutex_lock(&st->gpio_lock);
+
+	if (value)
+		st->gpio_val |= BIT(offset);
+	else
+		st->gpio_val &= ~BIT(offset);
+
+	st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val);
+
+	mutex_unlock(&st->gpio_lock);
+}
+
+static int ad5592r_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct ad5592r_state *st = gpiochip_get_data(chip);
+	int ret;
+
+	mutex_lock(&st->gpio_lock);
+
+	st->gpio_out &= ~BIT(offset);
+	st->gpio_in |= BIT(offset);
+
+	ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out);
+	if (ret < 0)
+		goto err_unlock;
+
+	ret = st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in);
+
+err_unlock:
+	mutex_unlock(&st->gpio_lock);
+
+	return ret;
+}
+
+static int ad5592r_gpio_direction_output(struct gpio_chip *chip,
+					 unsigned offset, int value)
+{
+	struct ad5592r_state *st = gpiochip_get_data(chip);
+	int ret;
+
+	mutex_lock(&st->gpio_lock);
+
+	if (value)
+		st->gpio_val |= BIT(offset);
+	else
+		st->gpio_val &= ~BIT(offset);
+
+	st->gpio_in &= ~BIT(offset);
+	st->gpio_out |= BIT(offset);
+
+	ret = st->ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val);
+	if (ret < 0)
+		goto err_unlock;
+
+	ret = st->ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out);
+	if (ret < 0)
+		goto err_unlock;
+
+	ret = st->ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in);
+
+err_unlock:
+	mutex_unlock(&st->gpio_lock);
+
+	return ret;
+}
+
+static int ad5592r_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	struct ad5592r_state *st = gpiochip_get_data(chip);
+
+	if (!(st->gpio_map & BIT(offset))) {
+		dev_err(st->dev, "GPIO %d is reserved by alternate function\n",
+			offset);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int ad5592r_gpio_init(struct ad5592r_state *st)
+{
+	if (!st->gpio_map)
+		return 0;
+
+	st->gpiochip.label = dev_name(st->dev);
+	st->gpiochip.base = -1;
+	st->gpiochip.ngpio = 8;
+	st->gpiochip.parent = st->dev;
+	st->gpiochip.can_sleep = true;
+	st->gpiochip.direction_input = ad5592r_gpio_direction_input;
+	st->gpiochip.direction_output = ad5592r_gpio_direction_output;
+	st->gpiochip.get = ad5592r_gpio_get;
+	st->gpiochip.set = ad5592r_gpio_set;
+	st->gpiochip.request = ad5592r_gpio_request;
+	st->gpiochip.owner = THIS_MODULE;
+
+	mutex_init(&st->gpio_lock);
+
+	return gpiochip_add_data(&st->gpiochip, st);
+}
+
+static void ad5592r_gpio_cleanup(struct ad5592r_state *st)
+{
+	if (st->gpio_map)
+		gpiochip_remove(&st->gpiochip);
+}
+
+static int ad5592r_reset(struct ad5592r_state *st)
+{
+	struct gpio_desc *gpio;
+
+	gpio = devm_gpiod_get_optional(st->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
+
+	if (gpio) {
+		udelay(1);
+		gpiod_set_value(gpio, 1);
+	} else {
+		mutex_lock(&st->lock);
+		/* Writing this magic value resets the device */
+		st->ops->reg_write(st, AD5592R_REG_RESET, 0xdac);
+		mutex_unlock(&st->lock);
+	}
+
+	udelay(250);
+
+	return 0;
+}
+
+static int ad5592r_get_vref(struct ad5592r_state *st)
+{
+	int ret;
+
+	if (st->reg) {
+		ret = regulator_get_voltage(st->reg);
+		if (ret < 0)
+			return ret;
+
+		return ret / 1000;
+	} else {
+		return 2500;
+	}
+}
+
+static int ad5592r_set_channel_modes(struct ad5592r_state *st)
+{
+	const struct ad5592r_rw_ops *ops = st->ops;
+	int ret;
+	unsigned i;
+	u8 pulldown = 0, tristate = 0, dac = 0, adc = 0;
+	u16 read_back;
+
+	for (i = 0; i < st->num_channels; i++) {
+		switch (st->channel_modes[i]) {
+		case CH_MODE_DAC:
+			dac |= BIT(i);
+			break;
+
+		case CH_MODE_ADC:
+			adc |= BIT(i);
+			break;
+
+		case CH_MODE_DAC_AND_ADC:
+			dac |= BIT(i);
+			adc |= BIT(i);
+			break;
+
+		case CH_MODE_GPIO:
+			st->gpio_map |= BIT(i);
+			st->gpio_in |= BIT(i); /* Default to input */
+			break;
+
+		case CH_MODE_UNUSED:
+		default:
+			switch (st->channel_offstate[i]) {
+			case CH_OFFSTATE_OUT_TRISTATE:
+				tristate |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_OUT_LOW:
+				st->gpio_out |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_OUT_HIGH:
+				st->gpio_out |= BIT(i);
+				st->gpio_val |= BIT(i);
+				break;
+
+			case CH_OFFSTATE_PULLDOWN:
+			default:
+				pulldown |= BIT(i);
+				break;
+			}
+		}
+	}
+
+	mutex_lock(&st->lock);
+
+	/* Pull down unused pins to GND */
+	ret = ops->reg_write(st, AD5592R_REG_PULLDOWN, pulldown);
+	if (ret)
+		goto err_unlock;
+
+	ret = ops->reg_write(st, AD5592R_REG_TRISTATE, tristate);
+	if (ret)
+		goto err_unlock;
+
+	/* Configure pins that we use */
+	ret = ops->reg_write(st, AD5592R_REG_DAC_EN, dac);
+	if (ret)
+		goto err_unlock;
+
+	ret = ops->reg_write(st, AD5592R_REG_ADC_EN, adc);
+	if (ret)
+		goto err_unlock;
+
+	ret = ops->reg_write(st, AD5592R_REG_GPIO_SET, st->gpio_val);
+	if (ret)
+		goto err_unlock;
+
+	ret = ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, st->gpio_out);
+	if (ret)
+		goto err_unlock;
+
+	ret = ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, st->gpio_in);
+	if (ret)
+		goto err_unlock;
+
+	/* Verify that we can read back at least one register */
+	ret = ops->reg_read(st, AD5592R_REG_ADC_EN, &read_back);
+	if (!ret && (read_back & 0xff) != adc)
+		ret = -EIO;
+
+err_unlock:
+	mutex_unlock(&st->lock);
+	return ret;
+}
+
+static int ad5592r_reset_channel_modes(struct ad5592r_state *st)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(st->channel_modes); i++)
+		st->channel_modes[i] = CH_MODE_UNUSED;
+
+	return ad5592r_set_channel_modes(st);
+}
+
+static int ad5592r_write_raw(struct iio_dev *iio_dev,
+	struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+	struct ad5592r_state *st = iio_priv(iio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+
+		if (val >= (1 << chan->scan_type.realbits) || val < 0)
+			return -EINVAL;
+
+		if (!chan->output)
+			return -EINVAL;
+
+		mutex_lock(&st->lock);
+		ret = st->ops->write_dac(st, chan->channel, val);
+		if (!ret)
+			st->cached_dac[chan->channel] = val;
+		mutex_unlock(&st->lock);
+		return ret;
+	case IIO_CHAN_INFO_SCALE:
+		if (chan->type == IIO_VOLTAGE) {
+			bool gain;
+
+			if (val == st->scale_avail[0][0] &&
+				val2 == st->scale_avail[0][1])
+				gain = false;
+			else if (val == st->scale_avail[1][0] &&
+				 val2 == st->scale_avail[1][1])
+				gain = true;
+			else
+				return -EINVAL;
+
+			mutex_lock(&st->lock);
+
+			ret = st->ops->reg_read(st, AD5592R_REG_CTRL,
+						&st->cached_gp_ctrl);
+			if (ret < 0) {
+				mutex_unlock(&st->lock);
+				return ret;
+			}
+
+			if (chan->output) {
+				if (gain)
+					st->cached_gp_ctrl |=
+						AD5592R_REG_CTRL_DAC_RANGE;
+				else
+					st->cached_gp_ctrl &=
+						~AD5592R_REG_CTRL_DAC_RANGE;
+			} else {
+				if (gain)
+					st->cached_gp_ctrl |=
+						AD5592R_REG_CTRL_ADC_RANGE;
+				else
+					st->cached_gp_ctrl &=
+						~AD5592R_REG_CTRL_ADC_RANGE;
+			}
+
+			ret = st->ops->reg_write(st, AD5592R_REG_CTRL,
+						 st->cached_gp_ctrl);
+			mutex_unlock(&st->lock);
+
+			return ret;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad5592r_read_raw(struct iio_dev *iio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2, long m)
+{
+	struct ad5592r_state *st = iio_priv(iio_dev);
+	u16 read_val;
+	int ret, mult;
+
+	switch (m) {
+	case IIO_CHAN_INFO_RAW:
+		if (!chan->output) {
+			mutex_lock(&st->lock);
+			ret = st->ops->read_adc(st, chan->channel, &read_val);
+			mutex_unlock(&st->lock);
+			if (ret)
+				return ret;
+
+			if ((read_val >> 12 & 0x7) != (chan->channel & 0x7)) {
+				dev_err(st->dev, "Error while reading channel %u\n",
+						chan->channel);
+				return -EIO;
+			}
+
+			read_val &= GENMASK(11, 0);
+
+		} else {
+			mutex_lock(&st->lock);
+			read_val = st->cached_dac[chan->channel];
+			mutex_unlock(&st->lock);
+		}
+
+		dev_dbg(st->dev, "Channel %u read: 0x%04hX\n",
+				chan->channel, read_val);
+
+		*val = (int) read_val;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = ad5592r_get_vref(st);
+
+		if (chan->type == IIO_TEMP) {
+			s64 tmp = *val * (3767897513LL / 25LL);
+			*val = div_s64_rem(tmp, 1000000000LL, val2);
+
+			return IIO_VAL_INT_PLUS_MICRO;
+		}
+
+		mutex_lock(&st->lock);
+
+		if (chan->output)
+			mult = !!(st->cached_gp_ctrl &
+				AD5592R_REG_CTRL_DAC_RANGE);
+		else
+			mult = !!(st->cached_gp_ctrl &
+				AD5592R_REG_CTRL_ADC_RANGE);
+
+		mutex_unlock(&st->lock);
+
+		*val *= ++mult;
+
+		*val2 = chan->scan_type.realbits;
+
+		return IIO_VAL_FRACTIONAL_LOG2;
+	case IIO_CHAN_INFO_OFFSET:
+		ret = ad5592r_get_vref(st);
+
+		mutex_lock(&st->lock);
+
+		if (st->cached_gp_ctrl & AD5592R_REG_CTRL_ADC_RANGE)
+			*val = (-34365 * 25) / ret;
+		else
+			*val = (-75365 * 25) / ret;
+
+		mutex_unlock(&st->lock);
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ad5592r_write_raw_get_fmt(struct iio_dev *indio_dev,
+				 struct iio_chan_spec const *chan, long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		return IIO_VAL_INT_PLUS_NANO;
+
+	default:
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info ad5592r_info = {
+	.read_raw = ad5592r_read_raw,
+	.write_raw = ad5592r_write_raw,
+	.write_raw_get_fmt = ad5592r_write_raw_get_fmt,
+};
+
+static ssize_t ad5592r_show_scale_available(struct iio_dev *iio_dev,
+					   uintptr_t private,
+					   const struct iio_chan_spec *chan,
+					   char *buf)
+{
+	struct ad5592r_state *st = iio_priv(iio_dev);
+
+	return sprintf(buf, "%d.%09u %d.%09u\n",
+		st->scale_avail[0][0], st->scale_avail[0][1],
+		st->scale_avail[1][0], st->scale_avail[1][1]);
+}
+
+static const struct iio_chan_spec_ext_info ad5592r_ext_info[] = {
+	{
+	 .name = "scale_available",
+	 .read = ad5592r_show_scale_available,
+	 .shared = IIO_SHARED_BY_TYPE,
+	 },
+	{},
+};
+
+static void ad5592r_setup_channel(struct iio_dev *iio_dev,
+		struct iio_chan_spec *chan, bool output, unsigned id)
+{
+	chan->type = IIO_VOLTAGE;
+	chan->indexed = 1;
+	chan->output = output;
+	chan->channel = id;
+	chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+	chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE);
+	chan->scan_type.sign = 'u';
+	chan->scan_type.realbits = 12;
+	chan->scan_type.storagebits = 16;
+	chan->ext_info = ad5592r_ext_info;
+}
+
+static int ad5592r_alloc_channels(struct iio_dev *iio_dev)
+{
+	struct ad5592r_state *st = iio_priv(iio_dev);
+	unsigned i, curr_channel = 0,
+		 num_channels = st->num_channels;
+	struct iio_chan_spec *channels;
+	struct fwnode_handle *child;
+	u32 reg, tmp;
+	int ret;
+
+	device_for_each_child_node(st->dev, child) {
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret || reg >= ARRAY_SIZE(st->channel_modes))
+			continue;
+
+		ret = fwnode_property_read_u32(child, "adi,mode", &tmp);
+		if (!ret)
+			st->channel_modes[reg] = tmp;
+
+		ret = fwnode_property_read_u32(child, "adi,off-state", &tmp);
+		if (!ret)
+			st->channel_offstate[reg] = tmp;
+	}
+
+	channels = devm_kcalloc(st->dev,
+			1 + 2 * num_channels, sizeof(*channels),
+			GFP_KERNEL);
+	if (!channels)
+		return -ENOMEM;
+
+	for (i = 0; i < num_channels; i++) {
+		switch (st->channel_modes[i]) {
+		case CH_MODE_DAC:
+			ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+					true, i);
+			curr_channel++;
+			break;
+
+		case CH_MODE_ADC:
+			ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+					false, i);
+			curr_channel++;
+			break;
+
+		case CH_MODE_DAC_AND_ADC:
+			ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+					true, i);
+			curr_channel++;
+			ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+					false, i);
+			curr_channel++;
+			break;
+
+		default:
+			continue;
+		}
+	}
+
+	channels[curr_channel].type = IIO_TEMP;
+	channels[curr_channel].channel = 8;
+	channels[curr_channel].info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				   BIT(IIO_CHAN_INFO_SCALE) |
+				   BIT(IIO_CHAN_INFO_OFFSET);
+	curr_channel++;
+
+	iio_dev->num_channels = curr_channel;
+	iio_dev->channels = channels;
+
+	return 0;
+}
+
+static void ad5592r_init_scales(struct ad5592r_state *st, int vref_mV)
+{
+	s64 tmp = (s64)vref_mV * 1000000000LL >> 12;
+
+	st->scale_avail[0][0] =
+		div_s64_rem(tmp, 1000000000LL, &st->scale_avail[0][1]);
+	st->scale_avail[1][0] =
+		div_s64_rem(tmp * 2, 1000000000LL, &st->scale_avail[1][1]);
+}
+
+int ad5592r_probe(struct device *dev, const char *name,
+		const struct ad5592r_rw_ops *ops)
+{
+	struct iio_dev *iio_dev;
+	struct ad5592r_state *st;
+	int ret;
+
+	iio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+	if (!iio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(iio_dev);
+	st->dev = dev;
+	st->ops = ops;
+	st->num_channels = 8;
+	dev_set_drvdata(dev, iio_dev);
+
+	st->reg = devm_regulator_get_optional(dev, "vref");
+	if (IS_ERR(st->reg)) {
+		if ((PTR_ERR(st->reg) != -ENODEV) && dev_fwnode(dev))
+			return PTR_ERR(st->reg);
+
+		st->reg = NULL;
+	} else {
+		ret = regulator_enable(st->reg);
+		if (ret)
+			return ret;
+	}
+
+	iio_dev->name = name;
+	iio_dev->info = &ad5592r_info;
+	iio_dev->modes = INDIO_DIRECT_MODE;
+
+	mutex_init(&st->lock);
+
+	ad5592r_init_scales(st, ad5592r_get_vref(st));
+
+	ret = ad5592r_reset(st);
+	if (ret)
+		goto error_disable_reg;
+
+	ret = ops->reg_write(st, AD5592R_REG_PD,
+		     (st->reg == NULL) ? AD5592R_REG_PD_EN_REF : 0);
+	if (ret)
+		goto error_disable_reg;
+
+	ret = ad5592r_alloc_channels(iio_dev);
+	if (ret)
+		goto error_disable_reg;
+
+	ret = ad5592r_set_channel_modes(st);
+	if (ret)
+		goto error_reset_ch_modes;
+
+	ret = iio_device_register(iio_dev);
+	if (ret)
+		goto error_reset_ch_modes;
+
+	ret = ad5592r_gpio_init(st);
+	if (ret)
+		goto error_dev_unregister;
+
+	return 0;
+
+error_dev_unregister:
+	iio_device_unregister(iio_dev);
+
+error_reset_ch_modes:
+	ad5592r_reset_channel_modes(st);
+
+error_disable_reg:
+	if (st->reg)
+		regulator_disable(st->reg);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(ad5592r_probe, IIO_AD5592R);
+
+void ad5592r_remove(struct device *dev)
+{
+	struct iio_dev *iio_dev = dev_get_drvdata(dev);
+	struct ad5592r_state *st = iio_priv(iio_dev);
+
+	iio_device_unregister(iio_dev);
+	ad5592r_reset_channel_modes(st);
+	ad5592r_gpio_cleanup(st);
+
+	if (st->reg)
+		regulator_disable(st->reg);
+}
+EXPORT_SYMBOL_NS_GPL(ad5592r_remove, IIO_AD5592R);
+
+MODULE_AUTHOR("Paul Cercueil <paul.cercueil@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
+MODULE_LICENSE("GPL v2");