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, 491 insertions, 0 deletions

diff --git a/drivers/leds/leds-mt6323.c b/drivers/leds/leds-mt6323.c
new file mode 100644
index 000000000..f59e0e8bd
--- /dev/null
+++ b/drivers/leds/leds-mt6323.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LED driver for Mediatek MT6323 PMIC
+ *
+ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
+ */
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/mfd/mt6323/registers.h>
+#include <linux/mfd/mt6397/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/*
+ * Register field for MT6323_TOP_CKPDN0 to enable
+ * 32K clock common for LED device.
+ */
+#define MT6323_RG_DRV_32K_CK_PDN	BIT(11)
+#define MT6323_RG_DRV_32K_CK_PDN_MASK	BIT(11)
+
+/*
+ * Register field for MT6323_TOP_CKPDN2 to enable
+ * individual clock for LED device.
+ */
+#define MT6323_RG_ISINK_CK_PDN(i)	BIT(i)
+#define MT6323_RG_ISINK_CK_PDN_MASK(i)	BIT(i)
+
+/*
+ * Register field for MT6323_TOP_CKCON1 to select
+ * clock source.
+ */
+#define MT6323_RG_ISINK_CK_SEL_MASK(i)	(BIT(10) << (i))
+
+/*
+ * Register for MT6323_ISINK_CON0 to setup the
+ * duty cycle of the blink.
+ */
+#define MT6323_ISINK_CON0(i)		(MT6323_ISINK0_CON0 + 0x8 * (i))
+#define MT6323_ISINK_DIM_DUTY_MASK	(0x1f << 8)
+#define MT6323_ISINK_DIM_DUTY(i)	(((i) << 8) & \
+					MT6323_ISINK_DIM_DUTY_MASK)
+
+/* Register to setup the period of the blink. */
+#define MT6323_ISINK_CON1(i)		(MT6323_ISINK0_CON1 + 0x8 * (i))
+#define MT6323_ISINK_DIM_FSEL_MASK	(0xffff)
+#define MT6323_ISINK_DIM_FSEL(i)	((i) & MT6323_ISINK_DIM_FSEL_MASK)
+
+/* Register to control the brightness. */
+#define MT6323_ISINK_CON2(i)		(MT6323_ISINK0_CON2 + 0x8 * (i))
+#define MT6323_ISINK_CH_STEP_SHIFT	12
+#define MT6323_ISINK_CH_STEP_MASK	(0x7 << 12)
+#define MT6323_ISINK_CH_STEP(i)		(((i) << 12) & \
+					MT6323_ISINK_CH_STEP_MASK)
+#define MT6323_ISINK_SFSTR0_TC_MASK	(0x3 << 1)
+#define MT6323_ISINK_SFSTR0_TC(i)	(((i) << 1) & \
+					MT6323_ISINK_SFSTR0_TC_MASK)
+#define MT6323_ISINK_SFSTR0_EN_MASK	BIT(0)
+#define MT6323_ISINK_SFSTR0_EN		BIT(0)
+
+/* Register to LED channel enablement. */
+#define MT6323_ISINK_CH_EN_MASK(i)	BIT(i)
+#define MT6323_ISINK_CH_EN(i)		BIT(i)
+
+#define MT6323_MAX_PERIOD		10000
+#define MT6323_MAX_LEDS			4
+#define MT6323_MAX_BRIGHTNESS		6
+#define MT6323_UNIT_DUTY		3125
+#define MT6323_CAL_HW_DUTY(o, p)	DIV_ROUND_CLOSEST((o) * 100000ul,\
+					(p) * MT6323_UNIT_DUTY)
+
+struct mt6323_leds;
+
+/**
+ * struct mt6323_led - state container for the LED device
+ * @id:			the identifier in MT6323 LED device
+ * @parent:		the pointer to MT6323 LED controller
+ * @cdev:		LED class device for this LED device
+ * @current_brightness: current state of the LED device
+ */
+struct mt6323_led {
+	int			id;
+	struct mt6323_leds	*parent;
+	struct led_classdev	cdev;
+	enum led_brightness	current_brightness;
+};
+
+/**
+ * struct mt6323_leds -	state container for holding LED controller
+ *			of the driver
+ * @dev:		the device pointer
+ * @hw:			the underlying hardware providing shared
+ *			bus for the register operations
+ * @lock:		the lock among process context
+ * @led:		the array that contains the state of individual
+ *			LED device
+ */
+struct mt6323_leds {
+	struct device		*dev;
+	struct mt6397_chip	*hw;
+	/* protect among process context */
+	struct mutex		lock;
+	struct mt6323_led	*led[MT6323_MAX_LEDS];
+};
+
+static int mt6323_led_hw_brightness(struct led_classdev *cdev,
+				    enum led_brightness brightness)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	struct regmap *regmap = leds->hw->regmap;
+	u32 con2_mask = 0, con2_val = 0;
+	int ret;
+
+	/*
+	 * Setup current output for the corresponding
+	 * brightness level.
+	 */
+	con2_mask |= MT6323_ISINK_CH_STEP_MASK |
+		     MT6323_ISINK_SFSTR0_TC_MASK |
+		     MT6323_ISINK_SFSTR0_EN_MASK;
+	con2_val |=  MT6323_ISINK_CH_STEP(brightness - 1) |
+		     MT6323_ISINK_SFSTR0_TC(2) |
+		     MT6323_ISINK_SFSTR0_EN;
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_CON2(led->id),
+				 con2_mask, con2_val);
+	return ret;
+}
+
+static int mt6323_led_hw_off(struct led_classdev *cdev)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	struct regmap *regmap = leds->hw->regmap;
+	unsigned int status;
+	int ret;
+
+	status = MT6323_ISINK_CH_EN(led->id);
+	ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+				 MT6323_ISINK_CH_EN_MASK(led->id), ~status);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(100, 300);
+	ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+				 MT6323_RG_ISINK_CK_PDN_MASK(led->id),
+				 MT6323_RG_ISINK_CK_PDN(led->id));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static enum led_brightness
+mt6323_get_led_hw_brightness(struct led_classdev *cdev)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	struct regmap *regmap = leds->hw->regmap;
+	unsigned int status;
+	int ret;
+
+	ret = regmap_read(regmap, MT6323_TOP_CKPDN2, &status);
+	if (ret < 0)
+		return ret;
+
+	if (status & MT6323_RG_ISINK_CK_PDN_MASK(led->id))
+		return 0;
+
+	ret = regmap_read(regmap, MT6323_ISINK_EN_CTRL, &status);
+	if (ret < 0)
+		return ret;
+
+	if (!(status & MT6323_ISINK_CH_EN(led->id)))
+		return 0;
+
+	ret = regmap_read(regmap, MT6323_ISINK_CON2(led->id), &status);
+	if (ret < 0)
+		return ret;
+
+	return  ((status & MT6323_ISINK_CH_STEP_MASK)
+		  >> MT6323_ISINK_CH_STEP_SHIFT) + 1;
+}
+
+static int mt6323_led_hw_on(struct led_classdev *cdev,
+			    enum led_brightness brightness)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	struct regmap *regmap = leds->hw->regmap;
+	unsigned int status;
+	int ret;
+
+	/*
+	 * Setup required clock source, enable the corresponding
+	 * clock and channel and let work with continuous blink as
+	 * the default.
+	 */
+	ret = regmap_update_bits(regmap, MT6323_TOP_CKCON1,
+				 MT6323_RG_ISINK_CK_SEL_MASK(led->id), 0);
+	if (ret < 0)
+		return ret;
+
+	status = MT6323_RG_ISINK_CK_PDN(led->id);
+	ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+				 MT6323_RG_ISINK_CK_PDN_MASK(led->id),
+				 ~status);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(100, 300);
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+				 MT6323_ISINK_CH_EN_MASK(led->id),
+				 MT6323_ISINK_CH_EN(led->id));
+	if (ret < 0)
+		return ret;
+
+	ret = mt6323_led_hw_brightness(cdev, brightness);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+				 MT6323_ISINK_DIM_DUTY_MASK,
+				 MT6323_ISINK_DIM_DUTY(31));
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+				 MT6323_ISINK_DIM_FSEL_MASK,
+				 MT6323_ISINK_DIM_FSEL(1000));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt6323_led_set_blink(struct led_classdev *cdev,
+				unsigned long *delay_on,
+				unsigned long *delay_off)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	struct regmap *regmap = leds->hw->regmap;
+	unsigned long period;
+	u8 duty_hw;
+	int ret;
+
+	/*
+	 * LED subsystem requires a default user
+	 * friendly blink pattern for the LED so using
+	 * 1Hz duty cycle 50% here if without specific
+	 * value delay_on and delay off being assigned.
+	 */
+	if (!*delay_on && !*delay_off) {
+		*delay_on = 500;
+		*delay_off = 500;
+	}
+
+	/*
+	 * Units are in ms, if over the hardware able
+	 * to support, fallback into software blink
+	 */
+	period = *delay_on + *delay_off;
+
+	if (period > MT6323_MAX_PERIOD)
+		return -EINVAL;
+
+	/*
+	 * Calculate duty_hw based on the percentage of period during
+	 * which the led is ON.
+	 */
+	duty_hw = MT6323_CAL_HW_DUTY(*delay_on, period);
+
+	/* hardware doesn't support zero duty cycle. */
+	if (!duty_hw)
+		return -EINVAL;
+
+	mutex_lock(&leds->lock);
+	/*
+	 * Set max_brightness as the software blink behavior
+	 * when no blink brightness.
+	 */
+	if (!led->current_brightness) {
+		ret = mt6323_led_hw_on(cdev, cdev->max_brightness);
+		if (ret < 0)
+			goto out;
+		led->current_brightness = cdev->max_brightness;
+	}
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+				 MT6323_ISINK_DIM_DUTY_MASK,
+				 MT6323_ISINK_DIM_DUTY(duty_hw - 1));
+	if (ret < 0)
+		goto out;
+
+	ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+				 MT6323_ISINK_DIM_FSEL_MASK,
+				 MT6323_ISINK_DIM_FSEL(period - 1));
+out:
+	mutex_unlock(&leds->lock);
+
+	return ret;
+}
+
+static int mt6323_led_set_brightness(struct led_classdev *cdev,
+				     enum led_brightness brightness)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	struct mt6323_leds *leds = led->parent;
+	int ret;
+
+	mutex_lock(&leds->lock);
+
+	if (!led->current_brightness && brightness) {
+		ret = mt6323_led_hw_on(cdev, brightness);
+		if (ret < 0)
+			goto out;
+	} else if (brightness) {
+		ret = mt6323_led_hw_brightness(cdev, brightness);
+		if (ret < 0)
+			goto out;
+	} else {
+		ret = mt6323_led_hw_off(cdev);
+		if (ret < 0)
+			goto out;
+	}
+
+	led->current_brightness = brightness;
+out:
+	mutex_unlock(&leds->lock);
+
+	return ret;
+}
+
+static int mt6323_led_set_dt_default(struct led_classdev *cdev,
+				     struct device_node *np)
+{
+	struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+	const char *state;
+	int ret = 0;
+
+	state = of_get_property(np, "default-state", NULL);
+	if (state) {
+		if (!strcmp(state, "keep")) {
+			ret = mt6323_get_led_hw_brightness(cdev);
+			if (ret < 0)
+				return ret;
+			led->current_brightness = ret;
+			ret = 0;
+		} else if (!strcmp(state, "on")) {
+			ret =
+			mt6323_led_set_brightness(cdev, cdev->max_brightness);
+		} else  {
+			ret = mt6323_led_set_brightness(cdev, LED_OFF);
+		}
+	}
+
+	return ret;
+}
+
+static int mt6323_led_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev_of_node(dev);
+	struct device_node *child;
+	struct mt6397_chip *hw = dev_get_drvdata(dev->parent);
+	struct mt6323_leds *leds;
+	struct mt6323_led *led;
+	int ret;
+	unsigned int status;
+	u32 reg;
+
+	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
+	if (!leds)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, leds);
+	leds->dev = dev;
+
+	/*
+	 * leds->hw points to the underlying bus for the register
+	 * controlled.
+	 */
+	leds->hw = hw;
+	mutex_init(&leds->lock);
+
+	status = MT6323_RG_DRV_32K_CK_PDN;
+	ret = regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+				 MT6323_RG_DRV_32K_CK_PDN_MASK, ~status);
+	if (ret < 0) {
+		dev_err(leds->dev,
+			"Failed to update MT6323_TOP_CKPDN0 Register\n");
+		return ret;
+	}
+
+	for_each_available_child_of_node(np, child) {
+		struct led_init_data init_data = {};
+
+		ret = of_property_read_u32(child, "reg", &reg);
+		if (ret) {
+			dev_err(dev, "Failed to read led 'reg' property\n");
+			goto put_child_node;
+		}
+
+		if (reg >= MT6323_MAX_LEDS || leds->led[reg]) {
+			dev_err(dev, "Invalid led reg %u\n", reg);
+			ret = -EINVAL;
+			goto put_child_node;
+		}
+
+		led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+		if (!led) {
+			ret = -ENOMEM;
+			goto put_child_node;
+		}
+
+		leds->led[reg] = led;
+		leds->led[reg]->id = reg;
+		leds->led[reg]->cdev.max_brightness = MT6323_MAX_BRIGHTNESS;
+		leds->led[reg]->cdev.brightness_set_blocking =
+					mt6323_led_set_brightness;
+		leds->led[reg]->cdev.blink_set = mt6323_led_set_blink;
+		leds->led[reg]->cdev.brightness_get =
+					mt6323_get_led_hw_brightness;
+		leds->led[reg]->parent = leds;
+
+		ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child);
+		if (ret < 0) {
+			dev_err(leds->dev,
+				"Failed to LED set default from devicetree\n");
+			goto put_child_node;
+		}
+
+		init_data.fwnode = of_fwnode_handle(child);
+
+		ret = devm_led_classdev_register_ext(dev, &leds->led[reg]->cdev,
+						     &init_data);
+		if (ret) {
+			dev_err(dev, "Failed to register LED: %d\n", ret);
+			goto put_child_node;
+		}
+	}
+
+	return 0;
+
+put_child_node:
+	of_node_put(child);
+	return ret;
+}
+
+static int mt6323_led_remove(struct platform_device *pdev)
+{
+	struct mt6323_leds *leds = platform_get_drvdata(pdev);
+	int i;
+
+	/* Turn the LEDs off on driver removal. */
+	for (i = 0 ; leds->led[i] ; i++)
+		mt6323_led_hw_off(&leds->led[i]->cdev);
+
+	regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+			   MT6323_RG_DRV_32K_CK_PDN_MASK,
+			   MT6323_RG_DRV_32K_CK_PDN);
+
+	mutex_destroy(&leds->lock);
+
+	return 0;
+}
+
+static const struct of_device_id mt6323_led_dt_match[] = {
+	{ .compatible = "mediatek,mt6323-led" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt6323_led_dt_match);
+
+static struct platform_driver mt6323_led_driver = {
+	.probe		= mt6323_led_probe,
+	.remove		= mt6323_led_remove,
+	.driver		= {
+		.name	= "mt6323-led",
+		.of_match_table = mt6323_led_dt_match,
+	},
+};
+
+module_platform_driver(mt6323_led_driver);
+
+MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC");
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_LICENSE("GPL");