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, 494 insertions, 0 deletions

diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
new file mode 100644
index 000000000..4a97cb745
--- /dev/null
+++ b/drivers/leds/led-core.c
@@ -0,0 +1,494 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Class Core
+ *
+ * Copyright 2005-2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <uapi/linux/uleds.h>
+#include "leds.h"
+
+DECLARE_RWSEM(leds_list_lock);
+EXPORT_SYMBOL_GPL(leds_list_lock);
+
+LIST_HEAD(leds_list);
+EXPORT_SYMBOL_GPL(leds_list);
+
+const char * const led_colors[LED_COLOR_ID_MAX] = {
+	[LED_COLOR_ID_WHITE] = "white",
+	[LED_COLOR_ID_RED] = "red",
+	[LED_COLOR_ID_GREEN] = "green",
+	[LED_COLOR_ID_BLUE] = "blue",
+	[LED_COLOR_ID_AMBER] = "amber",
+	[LED_COLOR_ID_VIOLET] = "violet",
+	[LED_COLOR_ID_YELLOW] = "yellow",
+	[LED_COLOR_ID_IR] = "ir",
+	[LED_COLOR_ID_MULTI] = "multicolor",
+	[LED_COLOR_ID_RGB] = "rgb",
+};
+EXPORT_SYMBOL_GPL(led_colors);
+
+static int __led_set_brightness(struct led_classdev *led_cdev, unsigned int value)
+{
+	if (!led_cdev->brightness_set)
+		return -ENOTSUPP;
+
+	led_cdev->brightness_set(led_cdev, value);
+
+	return 0;
+}
+
+static int __led_set_brightness_blocking(struct led_classdev *led_cdev, unsigned int value)
+{
+	if (!led_cdev->brightness_set_blocking)
+		return -ENOTSUPP;
+
+	return led_cdev->brightness_set_blocking(led_cdev, value);
+}
+
+static void led_timer_function(struct timer_list *t)
+{
+	struct led_classdev *led_cdev = from_timer(led_cdev, t, blink_timer);
+	unsigned long brightness;
+	unsigned long delay;
+
+	if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) {
+		led_set_brightness_nosleep(led_cdev, LED_OFF);
+		clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+		return;
+	}
+
+	if (test_and_clear_bit(LED_BLINK_ONESHOT_STOP,
+			       &led_cdev->work_flags)) {
+		clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+		return;
+	}
+
+	brightness = led_get_brightness(led_cdev);
+	if (!brightness) {
+		/* Time to switch the LED on. */
+		if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE,
+					&led_cdev->work_flags))
+			brightness = led_cdev->new_blink_brightness;
+		else
+			brightness = led_cdev->blink_brightness;
+		delay = led_cdev->blink_delay_on;
+	} else {
+		/* Store the current brightness value to be able
+		 * to restore it when the delay_off period is over.
+		 */
+		led_cdev->blink_brightness = brightness;
+		brightness = LED_OFF;
+		delay = led_cdev->blink_delay_off;
+	}
+
+	led_set_brightness_nosleep(led_cdev, brightness);
+
+	/* Return in next iteration if led is in one-shot mode and we are in
+	 * the final blink state so that the led is toggled each delay_on +
+	 * delay_off milliseconds in worst case.
+	 */
+	if (test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags)) {
+		if (test_bit(LED_BLINK_INVERT, &led_cdev->work_flags)) {
+			if (brightness)
+				set_bit(LED_BLINK_ONESHOT_STOP,
+					&led_cdev->work_flags);
+		} else {
+			if (!brightness)
+				set_bit(LED_BLINK_ONESHOT_STOP,
+					&led_cdev->work_flags);
+		}
+	}
+
+	mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay));
+}
+
+static void set_brightness_delayed(struct work_struct *ws)
+{
+	struct led_classdev *led_cdev =
+		container_of(ws, struct led_classdev, set_brightness_work);
+	int ret = 0;
+
+	if (test_and_clear_bit(LED_BLINK_DISABLE, &led_cdev->work_flags)) {
+		led_cdev->delayed_set_value = LED_OFF;
+		led_stop_software_blink(led_cdev);
+	}
+
+	ret = __led_set_brightness(led_cdev, led_cdev->delayed_set_value);
+	if (ret == -ENOTSUPP)
+		ret = __led_set_brightness_blocking(led_cdev,
+					led_cdev->delayed_set_value);
+	if (ret < 0 &&
+	    /* LED HW might have been unplugged, therefore don't warn */
+	    !(ret == -ENODEV && (led_cdev->flags & LED_UNREGISTERING) &&
+	    (led_cdev->flags & LED_HW_PLUGGABLE)))
+		dev_err(led_cdev->dev,
+			"Setting an LED's brightness failed (%d)\n", ret);
+}
+
+static void led_set_software_blink(struct led_classdev *led_cdev,
+				   unsigned long delay_on,
+				   unsigned long delay_off)
+{
+	int current_brightness;
+
+	current_brightness = led_get_brightness(led_cdev);
+	if (current_brightness)
+		led_cdev->blink_brightness = current_brightness;
+	if (!led_cdev->blink_brightness)
+		led_cdev->blink_brightness = led_cdev->max_brightness;
+
+	led_cdev->blink_delay_on = delay_on;
+	led_cdev->blink_delay_off = delay_off;
+
+	/* never on - just set to off */
+	if (!delay_on) {
+		led_set_brightness_nosleep(led_cdev, LED_OFF);
+		return;
+	}
+
+	/* never off - just set to brightness */
+	if (!delay_off) {
+		led_set_brightness_nosleep(led_cdev,
+					   led_cdev->blink_brightness);
+		return;
+	}
+
+	set_bit(LED_BLINK_SW, &led_cdev->work_flags);
+	mod_timer(&led_cdev->blink_timer, jiffies + 1);
+}
+
+
+static void led_blink_setup(struct led_classdev *led_cdev,
+		     unsigned long *delay_on,
+		     unsigned long *delay_off)
+{
+	if (!test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) &&
+	    led_cdev->blink_set &&
+	    !led_cdev->blink_set(led_cdev, delay_on, delay_off))
+		return;
+
+	/* blink with 1 Hz as default if nothing specified */
+	if (!*delay_on && !*delay_off)
+		*delay_on = *delay_off = 500;
+
+	led_set_software_blink(led_cdev, *delay_on, *delay_off);
+}
+
+void led_init_core(struct led_classdev *led_cdev)
+{
+	INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
+
+	timer_setup(&led_cdev->blink_timer, led_timer_function, 0);
+}
+EXPORT_SYMBOL_GPL(led_init_core);
+
+void led_blink_set(struct led_classdev *led_cdev,
+		   unsigned long *delay_on,
+		   unsigned long *delay_off)
+{
+	del_timer_sync(&led_cdev->blink_timer);
+
+	clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+	clear_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags);
+	clear_bit(LED_BLINK_ONESHOT_STOP, &led_cdev->work_flags);
+
+	led_blink_setup(led_cdev, delay_on, delay_off);
+}
+EXPORT_SYMBOL_GPL(led_blink_set);
+
+void led_blink_set_oneshot(struct led_classdev *led_cdev,
+			   unsigned long *delay_on,
+			   unsigned long *delay_off,
+			   int invert)
+{
+	if (test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) &&
+	     timer_pending(&led_cdev->blink_timer))
+		return;
+
+	set_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags);
+	clear_bit(LED_BLINK_ONESHOT_STOP, &led_cdev->work_flags);
+
+	if (invert)
+		set_bit(LED_BLINK_INVERT, &led_cdev->work_flags);
+	else
+		clear_bit(LED_BLINK_INVERT, &led_cdev->work_flags);
+
+	led_blink_setup(led_cdev, delay_on, delay_off);
+}
+EXPORT_SYMBOL_GPL(led_blink_set_oneshot);
+
+void led_stop_software_blink(struct led_classdev *led_cdev)
+{
+	del_timer_sync(&led_cdev->blink_timer);
+	led_cdev->blink_delay_on = 0;
+	led_cdev->blink_delay_off = 0;
+	clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+}
+EXPORT_SYMBOL_GPL(led_stop_software_blink);
+
+void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness)
+{
+	/*
+	 * If software blink is active, delay brightness setting
+	 * until the next timer tick.
+	 */
+	if (test_bit(LED_BLINK_SW, &led_cdev->work_flags)) {
+		/*
+		 * If we need to disable soft blinking delegate this to the
+		 * work queue task to avoid problems in case we are called
+		 * from hard irq context.
+		 */
+		if (!brightness) {
+			set_bit(LED_BLINK_DISABLE, &led_cdev->work_flags);
+			schedule_work(&led_cdev->set_brightness_work);
+		} else {
+			set_bit(LED_BLINK_BRIGHTNESS_CHANGE,
+				&led_cdev->work_flags);
+			led_cdev->new_blink_brightness = brightness;
+		}
+		return;
+	}
+
+	led_set_brightness_nosleep(led_cdev, brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness);
+
+void led_set_brightness_nopm(struct led_classdev *led_cdev, unsigned int value)
+{
+	/* Use brightness_set op if available, it is guaranteed not to sleep */
+	if (!__led_set_brightness(led_cdev, value))
+		return;
+
+	/* If brightness setting can sleep, delegate it to a work queue task */
+	led_cdev->delayed_set_value = value;
+	schedule_work(&led_cdev->set_brightness_work);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_nopm);
+
+void led_set_brightness_nosleep(struct led_classdev *led_cdev, unsigned int value)
+{
+	led_cdev->brightness = min(value, led_cdev->max_brightness);
+
+	if (led_cdev->flags & LED_SUSPENDED)
+		return;
+
+	led_set_brightness_nopm(led_cdev, led_cdev->brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_nosleep);
+
+int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value)
+{
+	if (led_cdev->blink_delay_on || led_cdev->blink_delay_off)
+		return -EBUSY;
+
+	led_cdev->brightness = min(value, led_cdev->max_brightness);
+
+	if (led_cdev->flags & LED_SUSPENDED)
+		return 0;
+
+	return __led_set_brightness_blocking(led_cdev, led_cdev->brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_sync);
+
+int led_update_brightness(struct led_classdev *led_cdev)
+{
+	int ret = 0;
+
+	if (led_cdev->brightness_get) {
+		ret = led_cdev->brightness_get(led_cdev);
+		if (ret >= 0) {
+			led_cdev->brightness = ret;
+			return 0;
+		}
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(led_update_brightness);
+
+u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size)
+{
+	struct fwnode_handle *fwnode = led_cdev->dev->fwnode;
+	u32 *pattern;
+	int count;
+
+	count = fwnode_property_count_u32(fwnode, "led-pattern");
+	if (count < 0)
+		return NULL;
+
+	pattern = kcalloc(count, sizeof(*pattern), GFP_KERNEL);
+	if (!pattern)
+		return NULL;
+
+	if (fwnode_property_read_u32_array(fwnode, "led-pattern", pattern, count)) {
+		kfree(pattern);
+		return NULL;
+	}
+
+	*size = count;
+
+	return pattern;
+}
+EXPORT_SYMBOL_GPL(led_get_default_pattern);
+
+/* Caller must ensure led_cdev->led_access held */
+void led_sysfs_disable(struct led_classdev *led_cdev)
+{
+	lockdep_assert_held(&led_cdev->led_access);
+
+	led_cdev->flags |= LED_SYSFS_DISABLE;
+}
+EXPORT_SYMBOL_GPL(led_sysfs_disable);
+
+/* Caller must ensure led_cdev->led_access held */
+void led_sysfs_enable(struct led_classdev *led_cdev)
+{
+	lockdep_assert_held(&led_cdev->led_access);
+
+	led_cdev->flags &= ~LED_SYSFS_DISABLE;
+}
+EXPORT_SYMBOL_GPL(led_sysfs_enable);
+
+static void led_parse_fwnode_props(struct device *dev,
+				   struct fwnode_handle *fwnode,
+				   struct led_properties *props)
+{
+	int ret;
+
+	if (!fwnode)
+		return;
+
+	if (fwnode_property_present(fwnode, "label")) {
+		ret = fwnode_property_read_string(fwnode, "label", &props->label);
+		if (ret)
+			dev_err(dev, "Error parsing 'label' property (%d)\n", ret);
+		return;
+	}
+
+	if (fwnode_property_present(fwnode, "color")) {
+		ret = fwnode_property_read_u32(fwnode, "color", &props->color);
+		if (ret)
+			dev_err(dev, "Error parsing 'color' property (%d)\n", ret);
+		else if (props->color >= LED_COLOR_ID_MAX)
+			dev_err(dev, "LED color identifier out of range\n");
+		else
+			props->color_present = true;
+	}
+
+
+	if (!fwnode_property_present(fwnode, "function"))
+		return;
+
+	ret = fwnode_property_read_string(fwnode, "function", &props->function);
+	if (ret) {
+		dev_err(dev,
+			"Error parsing 'function' property (%d)\n",
+			ret);
+	}
+
+	if (!fwnode_property_present(fwnode, "function-enumerator"))
+		return;
+
+	ret = fwnode_property_read_u32(fwnode, "function-enumerator",
+				       &props->func_enum);
+	if (ret) {
+		dev_err(dev,
+			"Error parsing 'function-enumerator' property (%d)\n",
+			ret);
+	} else {
+		props->func_enum_present = true;
+	}
+}
+
+int led_compose_name(struct device *dev, struct led_init_data *init_data,
+		     char *led_classdev_name)
+{
+	struct led_properties props = {};
+	struct fwnode_handle *fwnode = init_data->fwnode;
+	const char *devicename = init_data->devicename;
+
+	/* We want to label LEDs that can produce full range of colors
+	 * as RGB, not multicolor */
+	BUG_ON(props.color == LED_COLOR_ID_MULTI);
+
+	if (!led_classdev_name)
+		return -EINVAL;
+
+	led_parse_fwnode_props(dev, fwnode, &props);
+
+	if (props.label) {
+		/*
+		 * If init_data.devicename is NULL, then it indicates that
+		 * DT label should be used as-is for LED class device name.
+		 * Otherwise the label is prepended with devicename to compose
+		 * the final LED class device name.
+		 */
+		if (!devicename) {
+			strscpy(led_classdev_name, props.label,
+				LED_MAX_NAME_SIZE);
+		} else {
+			snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+				 devicename, props.label);
+		}
+	} else if (props.function || props.color_present) {
+		char tmp_buf[LED_MAX_NAME_SIZE];
+
+		if (props.func_enum_present) {
+			snprintf(tmp_buf, LED_MAX_NAME_SIZE, "%s:%s-%d",
+				 props.color_present ? led_colors[props.color] : "",
+				 props.function ?: "", props.func_enum);
+		} else {
+			snprintf(tmp_buf, LED_MAX_NAME_SIZE, "%s:%s",
+				 props.color_present ? led_colors[props.color] : "",
+				 props.function ?: "");
+		}
+		if (init_data->devname_mandatory) {
+			snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+				 devicename, tmp_buf);
+		} else {
+			strscpy(led_classdev_name, tmp_buf, LED_MAX_NAME_SIZE);
+
+		}
+	} else if (init_data->default_label) {
+		if (!devicename) {
+			dev_err(dev, "Legacy LED naming requires devicename segment");
+			return -EINVAL;
+		}
+		snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+			 devicename, init_data->default_label);
+	} else if (is_of_node(fwnode)) {
+		strscpy(led_classdev_name, to_of_node(fwnode)->name,
+			LED_MAX_NAME_SIZE);
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(led_compose_name);
+
+enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode)
+{
+	const char *state = NULL;
+
+	if (!fwnode_property_read_string(fwnode, "default-state", &state)) {
+		if (!strcmp(state, "keep"))
+			return LEDS_DEFSTATE_KEEP;
+		if (!strcmp(state, "on"))
+			return LEDS_DEFSTATE_ON;
+	}
+
+	return LEDS_DEFSTATE_OFF;
+}
+EXPORT_SYMBOL_GPL(led_init_default_state_get);