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, 772 insertions, 0 deletions

diff --git a/drivers/leds/flash/leds-as3645a.c b/drivers/leds/flash/leds-as3645a.c
new file mode 100644
index 000000000..bb2249771
--- /dev/null
+++ b/drivers/leds/flash/leds-as3645a.c
@@ -0,0 +1,772 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver
+ *
+ * Copyright (C) 2008-2011 Nokia Corporation
+ * Copyright (c) 2011, 2017 Intel Corporation.
+ *
+ * Based on drivers/media/i2c/as3645a.c.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@iki.fi>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/led-class-flash.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+#define AS_TIMER_US_TO_CODE(t)			(((t) / 1000 - 100) / 50)
+#define AS_TIMER_CODE_TO_US(c)			((50 * (c) + 100) * 1000)
+
+/* Register definitions */
+
+/* Read-only Design info register: Reset state: xxxx 0001 */
+#define AS_DESIGN_INFO_REG			0x00
+#define AS_DESIGN_INFO_FACTORY(x)		(((x) >> 4))
+#define AS_DESIGN_INFO_MODEL(x)			((x) & 0x0f)
+
+/* Read-only Version control register: Reset state: 0000 0000
+ * for first engineering samples
+ */
+#define AS_VERSION_CONTROL_REG			0x01
+#define AS_VERSION_CONTROL_RFU(x)		(((x) >> 4))
+#define AS_VERSION_CONTROL_VERSION(x)		((x) & 0x0f)
+
+/* Read / Write	(Indicator and timer register): Reset state: 0000 1111 */
+#define AS_INDICATOR_AND_TIMER_REG		0x02
+#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT	0
+#define AS_INDICATOR_AND_TIMER_VREF_SHIFT	4
+#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT	6
+
+/* Read / Write	(Current set register): Reset state: 0110 1001 */
+#define AS_CURRENT_SET_REG			0x03
+#define AS_CURRENT_ASSIST_LIGHT_SHIFT		0
+#define AS_CURRENT_LED_DET_ON			(1 << 3)
+#define AS_CURRENT_FLASH_CURRENT_SHIFT		4
+
+/* Read / Write	(Control register): Reset state: 1011 0100 */
+#define AS_CONTROL_REG				0x04
+#define AS_CONTROL_MODE_SETTING_SHIFT		0
+#define AS_CONTROL_STROBE_ON			(1 << 2)
+#define AS_CONTROL_OUT_ON			(1 << 3)
+#define AS_CONTROL_EXT_TORCH_ON			(1 << 4)
+#define AS_CONTROL_STROBE_TYPE_EDGE		(0 << 5)
+#define AS_CONTROL_STROBE_TYPE_LEVEL		(1 << 5)
+#define AS_CONTROL_COIL_PEAK_SHIFT		6
+
+/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
+#define AS_FAULT_INFO_REG			0x05
+#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT	(1 << 1)
+#define AS_FAULT_INFO_INDICATOR_LED		(1 << 2)
+#define AS_FAULT_INFO_LED_AMOUNT		(1 << 3)
+#define AS_FAULT_INFO_TIMEOUT			(1 << 4)
+#define AS_FAULT_INFO_OVER_TEMPERATURE		(1 << 5)
+#define AS_FAULT_INFO_SHORT_CIRCUIT		(1 << 6)
+#define AS_FAULT_INFO_OVER_VOLTAGE		(1 << 7)
+
+/* Boost register */
+#define AS_BOOST_REG				0x0d
+#define AS_BOOST_CURRENT_DISABLE		(0 << 0)
+#define AS_BOOST_CURRENT_ENABLE			(1 << 0)
+
+/* Password register is used to unlock boost register writing */
+#define AS_PASSWORD_REG				0x0f
+#define AS_PASSWORD_UNLOCK_VALUE		0x55
+
+#define AS_NAME					"as3645a"
+#define AS_I2C_ADDR				(0x60 >> 1) /* W:0x60, R:0x61 */
+
+#define AS_FLASH_TIMEOUT_MIN			100000	/* us */
+#define AS_FLASH_TIMEOUT_MAX			850000
+#define AS_FLASH_TIMEOUT_STEP			50000
+
+#define AS_FLASH_INTENSITY_MIN			200000	/* uA */
+#define AS_FLASH_INTENSITY_MAX_1LED		500000
+#define AS_FLASH_INTENSITY_MAX_2LEDS		400000
+#define AS_FLASH_INTENSITY_STEP			20000
+
+#define AS_TORCH_INTENSITY_MIN			20000	/* uA */
+#define AS_TORCH_INTENSITY_MAX			160000
+#define AS_TORCH_INTENSITY_STEP			20000
+
+#define AS_INDICATOR_INTENSITY_MIN		0	/* uA */
+#define AS_INDICATOR_INTENSITY_MAX		10000
+#define AS_INDICATOR_INTENSITY_STEP		2500
+
+#define AS_PEAK_mA_MAX				2000
+#define AS_PEAK_mA_TO_REG(a) \
+	((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250)
+
+/* LED numbers for Devicetree */
+#define AS_LED_FLASH				0
+#define AS_LED_INDICATOR			1
+
+enum as_mode {
+	AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT,
+	AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT,
+	AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT,
+	AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT,
+};
+
+struct as3645a_config {
+	u32 flash_timeout_us;
+	u32 flash_max_ua;
+	u32 assist_max_ua;
+	u32 indicator_max_ua;
+	u32 voltage_reference;
+	u32 peak;
+};
+
+struct as3645a {
+	struct i2c_client *client;
+
+	struct mutex mutex;
+
+	struct led_classdev_flash fled;
+	struct led_classdev iled_cdev;
+
+	struct v4l2_flash *vf;
+	struct v4l2_flash *vfind;
+
+	struct fwnode_handle *flash_node;
+	struct fwnode_handle *indicator_node;
+
+	struct as3645a_config cfg;
+
+	enum as_mode mode;
+	unsigned int timeout;
+	unsigned int flash_current;
+	unsigned int assist_current;
+	unsigned int indicator_current;
+	enum v4l2_flash_strobe_source strobe_source;
+};
+
+#define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled)
+#define iled_cdev_to_as3645a(__iled_cdev) \
+	container_of(__iled_cdev, struct as3645a, iled_cdev)
+
+/* Return negative errno else zero on success */
+static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
+{
+	struct i2c_client *client = flash->client;
+	int rval;
+
+	rval = i2c_smbus_write_byte_data(client, addr, val);
+
+	dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
+		rval < 0 ? "fail" : "ok");
+
+	return rval;
+}
+
+/* Return negative errno else a data byte received from the device. */
+static int as3645a_read(struct as3645a *flash, u8 addr)
+{
+	struct i2c_client *client = flash->client;
+	int rval;
+
+	rval = i2c_smbus_read_byte_data(client, addr);
+
+	dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
+		rval < 0 ? "fail" : "ok");
+
+	return rval;
+}
+
+/* -----------------------------------------------------------------------------
+ * Hardware configuration and trigger
+ */
+
+/**
+ * as3645a_set_current - Set flash configuration registers
+ * @flash: The flash
+ *
+ * Configure the hardware with flash, assist and indicator currents, as well as
+ * flash timeout.
+ *
+ * Return 0 on success, or a negative error code if an I2C communication error
+ * occurred.
+ */
+static int as3645a_set_current(struct as3645a *flash)
+{
+	u8 val;
+
+	val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
+	    | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
+	    | AS_CURRENT_LED_DET_ON;
+
+	return as3645a_write(flash, AS_CURRENT_SET_REG, val);
+}
+
+static int as3645a_set_timeout(struct as3645a *flash)
+{
+	u8 val;
+
+	val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
+
+	val |= (flash->cfg.voltage_reference
+		<< AS_INDICATOR_AND_TIMER_VREF_SHIFT)
+	    |  ((flash->indicator_current ? flash->indicator_current - 1 : 0)
+		 << AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
+
+	return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
+}
+
+/**
+ * as3645a_set_control - Set flash control register
+ * @flash: The flash
+ * @mode: Desired output mode
+ * @on: Desired output state
+ *
+ * Configure the hardware with output mode and state.
+ *
+ * Return 0 on success, or a negative error code if an I2C communication error
+ * occurred.
+ */
+static int
+as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
+{
+	u8 reg;
+
+	/* Configure output parameters and operation mode. */
+	reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT)
+	    | (on ? AS_CONTROL_OUT_ON : 0)
+	    | mode;
+
+	if (mode == AS_MODE_FLASH &&
+	    flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
+		reg |= AS_CONTROL_STROBE_TYPE_LEVEL
+		    |  AS_CONTROL_STROBE_ON;
+
+	return as3645a_write(flash, AS_CONTROL_REG, reg);
+}
+
+static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault)
+{
+	struct as3645a *flash = fled_to_as3645a(fled);
+	int rval;
+
+	/* NOTE: reading register clears fault status */
+	rval = as3645a_read(flash, AS_FAULT_INFO_REG);
+	if (rval < 0)
+		return rval;
+
+	if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
+		*fault |= LED_FAULT_OVER_CURRENT;
+
+	if (rval & AS_FAULT_INFO_INDICATOR_LED)
+		*fault |= LED_FAULT_INDICATOR;
+
+	dev_dbg(&flash->client->dev, "%u connected LEDs\n",
+		rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
+
+	if (rval & AS_FAULT_INFO_TIMEOUT)
+		*fault |= LED_FAULT_TIMEOUT;
+
+	if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
+		*fault |= LED_FAULT_OVER_TEMPERATURE;
+
+	if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
+		*fault |= LED_FAULT_OVER_CURRENT;
+
+	if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
+		*fault |= LED_FAULT_INPUT_VOLTAGE;
+
+	return rval;
+}
+
+static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max,
+					     unsigned int step,
+					     unsigned int val)
+{
+	if (val < min)
+		val = min;
+
+	if (val > max)
+		val = max;
+
+	return (val - min) / step;
+}
+
+static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash,
+					   unsigned int ua)
+{
+	if (is_flash)
+		return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN,
+						flash->cfg.assist_max_ua,
+						AS_TORCH_INTENSITY_STEP, ua);
+	else
+		return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN,
+						flash->cfg.flash_max_ua,
+						AS_FLASH_INTENSITY_STEP, ua);
+}
+
+static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev,
+					    enum led_brightness brightness)
+{
+	struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev);
+	int rval;
+
+	flash->indicator_current = brightness;
+
+	rval = as3645a_set_timeout(flash);
+	if (rval)
+		return rval;
+
+	return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness);
+}
+
+static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev,
+					 enum led_brightness brightness)
+{
+	struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev);
+	struct as3645a *flash = fled_to_as3645a(fled);
+	int rval;
+
+	if (brightness) {
+		/* Register value 0 is 20 mA. */
+		flash->assist_current = brightness - 1;
+
+		rval = as3645a_set_current(flash);
+		if (rval)
+			return rval;
+	}
+
+	return as3645a_set_control(flash, AS_MODE_ASSIST, brightness);
+}
+
+static int as3645a_set_flash_brightness(struct led_classdev_flash *fled,
+					u32 brightness_ua)
+{
+	struct as3645a *flash = fled_to_as3645a(fled);
+
+	flash->flash_current = as3645a_current_to_reg(flash, true,
+						      brightness_ua);
+
+	return as3645a_set_current(flash);
+}
+
+static int as3645a_set_flash_timeout(struct led_classdev_flash *fled,
+				     u32 timeout_us)
+{
+	struct as3645a *flash = fled_to_as3645a(fled);
+
+	flash->timeout = AS_TIMER_US_TO_CODE(timeout_us);
+
+	return as3645a_set_timeout(flash);
+}
+
+static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state)
+{
+	struct as3645a *flash = fled_to_as3645a(fled);
+
+	return as3645a_set_control(flash, AS_MODE_FLASH, state);
+}
+
+static const struct led_flash_ops as3645a_led_flash_ops = {
+	.flash_brightness_set = as3645a_set_flash_brightness,
+	.timeout_set = as3645a_set_flash_timeout,
+	.strobe_set = as3645a_set_strobe,
+	.fault_get = as3645a_get_fault,
+};
+
+static int as3645a_setup(struct as3645a *flash)
+{
+	struct device *dev = &flash->client->dev;
+	u32 fault = 0;
+	int rval;
+
+	/* clear errors */
+	rval = as3645a_read(flash, AS_FAULT_INFO_REG);
+	if (rval < 0)
+		return rval;
+
+	dev_dbg(dev, "Fault info: %02x\n", rval);
+
+	rval = as3645a_set_current(flash);
+	if (rval < 0)
+		return rval;
+
+	rval = as3645a_set_timeout(flash);
+	if (rval < 0)
+		return rval;
+
+	rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
+	if (rval < 0)
+		return rval;
+
+	/* read status */
+	rval = as3645a_get_fault(&flash->fled, &fault);
+	if (rval < 0)
+		return rval;
+
+	dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
+		as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
+	dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
+		as3645a_read(flash, AS_CURRENT_SET_REG));
+	dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
+		as3645a_read(flash, AS_CONTROL_REG));
+
+	return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
+}
+
+static int as3645a_detect(struct as3645a *flash)
+{
+	struct device *dev = &flash->client->dev;
+	int rval, man, model, rfu, version;
+	const char *vendor;
+
+	rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
+	if (rval < 0) {
+		dev_err(dev, "can't read design info reg\n");
+		return rval;
+	}
+
+	man = AS_DESIGN_INFO_FACTORY(rval);
+	model = AS_DESIGN_INFO_MODEL(rval);
+
+	rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
+	if (rval < 0) {
+		dev_err(dev, "can't read version control reg\n");
+		return rval;
+	}
+
+	rfu = AS_VERSION_CONTROL_RFU(rval);
+	version = AS_VERSION_CONTROL_VERSION(rval);
+
+	/* Verify the chip model and version. */
+	if (model != 0x01 || rfu != 0x00) {
+		dev_err(dev, "AS3645A not detected (model %d rfu %d)\n",
+			model, rfu);
+		return -ENODEV;
+	}
+
+	switch (man) {
+	case 1:
+		vendor = "AMS, Austria Micro Systems";
+		break;
+	case 2:
+		vendor = "ADI, Analog Devices Inc.";
+		break;
+	case 3:
+		vendor = "NSC, National Semiconductor";
+		break;
+	case 4:
+		vendor = "NXP";
+		break;
+	case 5:
+		vendor = "TI, Texas Instrument";
+		break;
+	default:
+		vendor = "Unknown";
+	}
+
+	dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
+		 man, version);
+
+	rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
+	if (rval < 0)
+		return rval;
+
+	return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
+}
+
+static int as3645a_parse_node(struct as3645a *flash,
+			      struct fwnode_handle *fwnode)
+{
+	struct as3645a_config *cfg = &flash->cfg;
+	struct fwnode_handle *child;
+	int rval;
+
+	fwnode_for_each_child_node(fwnode, child) {
+		u32 id = 0;
+
+		fwnode_property_read_u32(child, "reg", &id);
+
+		switch (id) {
+		case AS_LED_FLASH:
+			flash->flash_node = child;
+			fwnode_handle_get(child);
+			break;
+		case AS_LED_INDICATOR:
+			flash->indicator_node = child;
+			fwnode_handle_get(child);
+			break;
+		default:
+			dev_warn(&flash->client->dev,
+				 "unknown LED %u encountered, ignoring\n", id);
+			break;
+		}
+	}
+
+	if (!flash->flash_node) {
+		dev_err(&flash->client->dev, "can't find flash node\n");
+		return -ENODEV;
+	}
+
+	rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us",
+					&cfg->flash_timeout_us);
+	if (rval < 0) {
+		dev_err(&flash->client->dev,
+			"can't read flash-timeout-us property for flash\n");
+		goto out_err;
+	}
+
+	rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp",
+					&cfg->flash_max_ua);
+	if (rval < 0) {
+		dev_err(&flash->client->dev,
+			"can't read flash-max-microamp property for flash\n");
+		goto out_err;
+	}
+
+	rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp",
+					&cfg->assist_max_ua);
+	if (rval < 0) {
+		dev_err(&flash->client->dev,
+			"can't read led-max-microamp property for flash\n");
+		goto out_err;
+	}
+
+	fwnode_property_read_u32(flash->flash_node, "voltage-reference",
+				 &cfg->voltage_reference);
+
+	fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp",
+				 &cfg->peak);
+	cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);
+
+	if (!flash->indicator_node) {
+		dev_warn(&flash->client->dev,
+			 "can't find indicator node\n");
+		rval = -ENODEV;
+		goto out_err;
+	}
+
+
+	rval = fwnode_property_read_u32(flash->indicator_node,
+					"led-max-microamp",
+					&cfg->indicator_max_ua);
+	if (rval < 0) {
+		dev_err(&flash->client->dev,
+			"can't read led-max-microamp property for indicator\n");
+		goto out_err;
+	}
+
+	return 0;
+
+out_err:
+	fwnode_handle_put(flash->flash_node);
+	fwnode_handle_put(flash->indicator_node);
+
+	return rval;
+}
+
+static int as3645a_led_class_setup(struct as3645a *flash)
+{
+	struct led_classdev *fled_cdev = &flash->fled.led_cdev;
+	struct led_classdev *iled_cdev = &flash->iled_cdev;
+	struct led_init_data init_data = {};
+	struct led_flash_setting *cfg;
+	int rval;
+
+	iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness;
+	iled_cdev->max_brightness =
+		flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP;
+	iled_cdev->flags = LED_CORE_SUSPENDRESUME;
+
+	init_data.fwnode = flash->indicator_node;
+	init_data.devicename = AS_NAME;
+	init_data.default_label = "indicator";
+
+	rval = led_classdev_register_ext(&flash->client->dev, iled_cdev,
+					 &init_data);
+	if (rval < 0)
+		return rval;
+
+	cfg = &flash->fled.brightness;
+	cfg->min = AS_FLASH_INTENSITY_MIN;
+	cfg->max = flash->cfg.flash_max_ua;
+	cfg->step = AS_FLASH_INTENSITY_STEP;
+	cfg->val = flash->cfg.flash_max_ua;
+
+	cfg = &flash->fled.timeout;
+	cfg->min = AS_FLASH_TIMEOUT_MIN;
+	cfg->max = flash->cfg.flash_timeout_us;
+	cfg->step = AS_FLASH_TIMEOUT_STEP;
+	cfg->val = flash->cfg.flash_timeout_us;
+
+	flash->fled.ops = &as3645a_led_flash_ops;
+
+	fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness;
+	/* Value 0 is off in LED class. */
+	fled_cdev->max_brightness =
+		as3645a_current_to_reg(flash, false,
+				       flash->cfg.assist_max_ua) + 1;
+	fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME;
+
+	init_data.fwnode = flash->flash_node;
+	init_data.devicename = AS_NAME;
+	init_data.default_label = "flash";
+
+	rval = led_classdev_flash_register_ext(&flash->client->dev,
+					       &flash->fled, &init_data);
+	if (rval)
+		goto out_err;
+
+	return rval;
+
+out_err:
+	led_classdev_unregister(iled_cdev);
+	dev_err(&flash->client->dev,
+		"led_classdev_flash_register() failed, error %d\n",
+		rval);
+	return rval;
+}
+
+static int as3645a_v4l2_setup(struct as3645a *flash)
+{
+	struct led_classdev_flash *fled = &flash->fled;
+	struct led_classdev *led = &fled->led_cdev;
+	struct v4l2_flash_config cfg = {
+		.intensity = {
+			.min = AS_TORCH_INTENSITY_MIN,
+			.max = flash->cfg.assist_max_ua,
+			.step = AS_TORCH_INTENSITY_STEP,
+			.val = flash->cfg.assist_max_ua,
+		},
+	};
+	struct v4l2_flash_config cfgind = {
+		.intensity = {
+			.min = AS_INDICATOR_INTENSITY_MIN,
+			.max = flash->cfg.indicator_max_ua,
+			.step = AS_INDICATOR_INTENSITY_STEP,
+			.val = flash->cfg.indicator_max_ua,
+		},
+	};
+
+	strlcpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name));
+	strlcpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name,
+		sizeof(cfgind.dev_name));
+
+	flash->vf = v4l2_flash_init(
+		&flash->client->dev, flash->flash_node, &flash->fled, NULL,
+		&cfg);
+	if (IS_ERR(flash->vf))
+		return PTR_ERR(flash->vf);
+
+	flash->vfind = v4l2_flash_indicator_init(
+		&flash->client->dev, flash->indicator_node, &flash->iled_cdev,
+		&cfgind);
+	if (IS_ERR(flash->vfind)) {
+		v4l2_flash_release(flash->vf);
+		return PTR_ERR(flash->vfind);
+	}
+
+	return 0;
+}
+
+static int as3645a_probe(struct i2c_client *client)
+{
+	struct as3645a *flash;
+	int rval;
+
+	if (!dev_fwnode(&client->dev))
+		return -ENODEV;
+
+	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
+	if (flash == NULL)
+		return -ENOMEM;
+
+	flash->client = client;
+
+	rval = as3645a_parse_node(flash, dev_fwnode(&client->dev));
+	if (rval < 0)
+		return rval;
+
+	rval = as3645a_detect(flash);
+	if (rval < 0)
+		goto out_put_nodes;
+
+	mutex_init(&flash->mutex);
+	i2c_set_clientdata(client, flash);
+
+	rval = as3645a_setup(flash);
+	if (rval)
+		goto out_mutex_destroy;
+
+	rval = as3645a_led_class_setup(flash);
+	if (rval)
+		goto out_mutex_destroy;
+
+	rval = as3645a_v4l2_setup(flash);
+	if (rval)
+		goto out_led_classdev_flash_unregister;
+
+	return 0;
+
+out_led_classdev_flash_unregister:
+	led_classdev_flash_unregister(&flash->fled);
+
+out_mutex_destroy:
+	mutex_destroy(&flash->mutex);
+
+out_put_nodes:
+	fwnode_handle_put(flash->flash_node);
+	fwnode_handle_put(flash->indicator_node);
+
+	return rval;
+}
+
+static void as3645a_remove(struct i2c_client *client)
+{
+	struct as3645a *flash = i2c_get_clientdata(client);
+
+	as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
+
+	v4l2_flash_release(flash->vf);
+	v4l2_flash_release(flash->vfind);
+
+	led_classdev_flash_unregister(&flash->fled);
+	led_classdev_unregister(&flash->iled_cdev);
+
+	mutex_destroy(&flash->mutex);
+
+	fwnode_handle_put(flash->flash_node);
+	fwnode_handle_put(flash->indicator_node);
+}
+
+static const struct i2c_device_id as3645a_id_table[] = {
+	{ AS_NAME, 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
+
+static const struct of_device_id as3645a_of_table[] = {
+	{ .compatible = "ams,as3645a" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, as3645a_of_table);
+
+static struct i2c_driver as3645a_i2c_driver = {
+	.driver	= {
+		.of_match_table = as3645a_of_table,
+		.name = AS_NAME,
+	},
+	.probe_new	= as3645a_probe,
+	.remove	= as3645a_remove,
+	.id_table = as3645a_id_table,
+};
+
+module_i2c_driver(as3645a_i2c_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
+MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
+MODULE_LICENSE("GPL v2");