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, 742 insertions, 0 deletions

diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
new file mode 100644
index 000000000..db64d44bc
--- /dev/null
+++ b/drivers/leds/leds-lm3532.c
@@ -0,0 +1,742 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM3532 LED driver
+// Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
+// https://www.ti.com/lit/ds/symlink/lm3532.pdf
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/regulator/consumer.h>
+#include <linux/module.h>
+#include <uapi/linux/uleds.h>
+#include <linux/gpio/consumer.h>
+
+#define LM3532_NAME "lm3532-led"
+#define LM3532_BL_MODE_MANUAL	0x00
+#define LM3532_BL_MODE_ALS	0x01
+
+#define LM3532_REG_OUTPUT_CFG	0x10
+#define LM3532_REG_STARTSHUT_RAMP	0x11
+#define LM3532_REG_RT_RAMP	0x12
+#define LM3532_REG_PWM_A_CFG	0x13
+#define LM3532_REG_PWM_B_CFG	0x14
+#define LM3532_REG_PWM_C_CFG	0x15
+#define LM3532_REG_ZONE_CFG_A	0x16
+#define LM3532_REG_CTRL_A_FS_CURR	0x17
+#define LM3532_REG_ZONE_CFG_B	0x18
+#define LM3532_REG_CTRL_B_FS_CURR	0x19
+#define LM3532_REG_ZONE_CFG_C	0x1a
+#define LM3532_REG_CTRL_C_FS_CURR	0x1b
+#define LM3532_REG_ENABLE	0x1d
+#define LM3532_ALS_CONFIG	0x23
+#define LM3532_REG_ZN_0_HI	0x60
+#define LM3532_REG_ZN_0_LO	0x61
+#define LM3532_REG_ZN_1_HI	0x62
+#define LM3532_REG_ZN_1_LO	0x63
+#define LM3532_REG_ZN_2_HI	0x64
+#define LM3532_REG_ZN_2_LO	0x65
+#define LM3532_REG_ZN_3_HI	0x66
+#define LM3532_REG_ZN_3_LO	0x67
+#define LM3532_REG_ZONE_TRGT_A	0x70
+#define LM3532_REG_ZONE_TRGT_B	0x75
+#define LM3532_REG_ZONE_TRGT_C	0x7a
+#define LM3532_REG_MAX		0x7e
+
+/* Control Enable */
+#define LM3532_CTRL_A_ENABLE	BIT(0)
+#define LM3532_CTRL_B_ENABLE	BIT(1)
+#define LM3532_CTRL_C_ENABLE	BIT(2)
+
+/* PWM Zone Control */
+#define LM3532_PWM_ZONE_MASK	0x7c
+#define LM3532_PWM_ZONE_0_EN	BIT(2)
+#define LM3532_PWM_ZONE_1_EN	BIT(3)
+#define LM3532_PWM_ZONE_2_EN	BIT(4)
+#define LM3532_PWM_ZONE_3_EN	BIT(5)
+#define LM3532_PWM_ZONE_4_EN	BIT(6)
+
+/* Brightness Configuration */
+#define LM3532_I2C_CTRL		BIT(0)
+#define LM3532_ALS_CTRL		0
+#define LM3532_LINEAR_MAP	BIT(1)
+#define LM3532_ZONE_MASK	(BIT(2) | BIT(3) | BIT(4))
+#define LM3532_ZONE_0		0
+#define LM3532_ZONE_1		BIT(2)
+#define LM3532_ZONE_2		BIT(3)
+#define LM3532_ZONE_3		(BIT(2) | BIT(3))
+#define LM3532_ZONE_4		BIT(4)
+
+#define LM3532_ENABLE_ALS	BIT(3)
+#define LM3532_ALS_SEL_SHIFT	6
+
+/* Zone Boundary Register */
+#define LM3532_ALS_WINDOW_mV	2000
+#define LM3532_ALS_ZB_MAX	4
+#define LM3532_ALS_OFFSET_mV	2
+
+#define LM3532_CONTROL_A	0
+#define LM3532_CONTROL_B	1
+#define LM3532_CONTROL_C	2
+#define LM3532_MAX_CONTROL_BANKS 3
+#define LM3532_MAX_LED_STRINGS	3
+
+#define LM3532_OUTPUT_CFG_MASK	0x3
+#define LM3532_BRT_VAL_ADJUST	8
+#define LM3532_RAMP_DOWN_SHIFT	3
+
+#define LM3532_NUM_RAMP_VALS	8
+#define LM3532_NUM_AVG_VALS	8
+#define LM3532_NUM_IMP_VALS	32
+
+#define LM3532_FS_CURR_MIN	5000
+#define LM3532_FS_CURR_MAX	29800
+#define LM3532_FS_CURR_STEP	800
+
+/*
+ * struct lm3532_als_data
+ * @config: value of ALS configuration register
+ * @als1_imp_sel: value of ALS1 resistor select register
+ * @als2_imp_sel: value of ALS2 resistor select register
+ * @als_avrg_time: ALS averaging time
+ * @als_input_mode: ALS input mode for brightness control
+ * @als_vmin: Minimum ALS voltage
+ * @als_vmax: Maximum ALS voltage
+ * @zone_lo: values of ALS lo ZB(Zone Boundary) registers
+ * @zone_hi: values of ALS hi ZB(Zone Boundary) registers
+ */
+struct lm3532_als_data {
+	u8 config;
+	u8 als1_imp_sel;
+	u8 als2_imp_sel;
+	u8 als_avrg_time;
+	u8 als_input_mode;
+	u32 als_vmin;
+	u32 als_vmax;
+	u8 zones_lo[LM3532_ALS_ZB_MAX];
+	u8 zones_hi[LM3532_ALS_ZB_MAX];
+};
+
+/**
+ * struct lm3532_led
+ * @led_dev: led class device
+ * @priv: Pointer the device data structure
+ * @control_bank: Control bank the LED is associated to
+ * @mode: Mode of the LED string
+ * @ctrl_brt_pointer: Zone target register that controls the sink
+ * @num_leds: Number of LED strings are supported in this array
+ * @full_scale_current: The full-scale current setting for the current sink.
+ * @led_strings: The LED strings supported in this array
+ * @enabled: Enabled status
+ */
+struct lm3532_led {
+	struct led_classdev led_dev;
+	struct lm3532_data *priv;
+
+	int control_bank;
+	int mode;
+	int ctrl_brt_pointer;
+	int num_leds;
+	int full_scale_current;
+	unsigned int enabled:1;
+	u32 led_strings[LM3532_MAX_CONTROL_BANKS];
+};
+
+/**
+ * struct lm3532_data
+ * @enable_gpio: Hardware enable gpio
+ * @regulator: regulator
+ * @client: i2c client
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @lock: Lock for reading/writing the device
+ * @als_data: Pointer to the als data struct
+ * @runtime_ramp_up: Runtime ramp up setting
+ * @runtime_ramp_down: Runtime ramp down setting
+ * @leds: Array of LED strings
+ */
+struct lm3532_data {
+	struct gpio_desc *enable_gpio;
+	struct regulator *regulator;
+	struct i2c_client *client;
+	struct regmap *regmap;
+	struct device *dev;
+	struct mutex lock;
+
+	struct lm3532_als_data *als_data;
+
+	u32 runtime_ramp_up;
+	u32 runtime_ramp_down;
+
+	struct lm3532_led leds[];
+};
+
+static const struct reg_default lm3532_reg_defs[] = {
+	{LM3532_REG_OUTPUT_CFG, 0xe4},
+	{LM3532_REG_STARTSHUT_RAMP, 0xc0},
+	{LM3532_REG_RT_RAMP, 0xc0},
+	{LM3532_REG_PWM_A_CFG, 0x82},
+	{LM3532_REG_PWM_B_CFG, 0x82},
+	{LM3532_REG_PWM_C_CFG, 0x82},
+	{LM3532_REG_ZONE_CFG_A, 0xf1},
+	{LM3532_REG_CTRL_A_FS_CURR, 0xf3},
+	{LM3532_REG_ZONE_CFG_B, 0xf1},
+	{LM3532_REG_CTRL_B_FS_CURR, 0xf3},
+	{LM3532_REG_ZONE_CFG_C, 0xf1},
+	{LM3532_REG_CTRL_C_FS_CURR, 0xf3},
+	{LM3532_REG_ENABLE, 0xf8},
+	{LM3532_ALS_CONFIG, 0x44},
+	{LM3532_REG_ZN_0_HI, 0x35},
+	{LM3532_REG_ZN_0_LO, 0x33},
+	{LM3532_REG_ZN_1_HI, 0x6a},
+	{LM3532_REG_ZN_1_LO, 0x66},
+	{LM3532_REG_ZN_2_HI, 0xa1},
+	{LM3532_REG_ZN_2_LO, 0x99},
+	{LM3532_REG_ZN_3_HI, 0xdc},
+	{LM3532_REG_ZN_3_LO, 0xcc},
+};
+
+static const struct regmap_config lm3532_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = LM3532_REG_MAX,
+	.reg_defaults = lm3532_reg_defs,
+	.num_reg_defaults = ARRAY_SIZE(lm3532_reg_defs),
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const int als_imp_table[LM3532_NUM_IMP_VALS] = {37000, 18500, 12330,
+						       92500, 7400, 6170, 5290,
+						       4630, 4110, 3700, 3360,
+						       3080, 2850, 2640, 2440,
+						       2310, 2180, 2060, 1950,
+						       1850, 1760, 1680, 1610,
+						       1540, 1480, 1420, 1370,
+						       1320, 1280, 1230, 1190};
+static int lm3532_get_als_imp_index(int als_imped)
+{
+	int i;
+
+	if (als_imped > als_imp_table[1])
+		return 0;
+
+	if (als_imped < als_imp_table[LM3532_NUM_IMP_VALS - 1])
+		return LM3532_NUM_IMP_VALS - 1;
+
+	for (i = 1; i < LM3532_NUM_IMP_VALS; i++) {
+		if (als_imped == als_imp_table[i])
+			return i;
+
+		/* Find an approximate index by looking up the table */
+		if (als_imped < als_imp_table[i - 1] &&
+		    als_imped > als_imp_table[i]) {
+			if (als_imped - als_imp_table[i - 1] <
+			    als_imp_table[i] - als_imped)
+				return i + 1;
+			else
+				return i;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int lm3532_get_index(const int table[], int size, int value)
+{
+	int i;
+
+	for (i = 1; i < size; i++) {
+		if (value == table[i])
+			return i;
+
+		/* Find an approximate index by looking up the table */
+		if (value > table[i - 1] &&
+		    value < table[i]) {
+			if (value - table[i - 1] < table[i] - value)
+				return i - 1;
+			else
+				return i;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static const int als_avrg_table[LM3532_NUM_AVG_VALS] = {17920, 35840, 71680,
+							1433360, 286720, 573440,
+							1146880, 2293760};
+static int lm3532_get_als_avg_index(int avg_time)
+{
+	if (avg_time <= als_avrg_table[0])
+		return 0;
+
+	if (avg_time > als_avrg_table[LM3532_NUM_AVG_VALS - 1])
+		return LM3532_NUM_AVG_VALS - 1;
+
+	return lm3532_get_index(&als_avrg_table[0], LM3532_NUM_AVG_VALS,
+				avg_time);
+}
+
+static const int ramp_table[LM3532_NUM_RAMP_VALS] = { 8, 1024, 2048, 4096, 8192,
+						     16384, 32768, 65536};
+static int lm3532_get_ramp_index(int ramp_time)
+{
+	if (ramp_time <= ramp_table[0])
+		return 0;
+
+	if (ramp_time > ramp_table[LM3532_NUM_RAMP_VALS - 1])
+		return LM3532_NUM_RAMP_VALS - 1;
+
+	return lm3532_get_index(&ramp_table[0], LM3532_NUM_RAMP_VALS,
+				ramp_time);
+}
+
+/* Caller must take care of locking */
+static int lm3532_led_enable(struct lm3532_led *led_data)
+{
+	int ctrl_en_val = BIT(led_data->control_bank);
+	int ret;
+
+	if (led_data->enabled)
+		return 0;
+
+	ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
+					 ctrl_en_val, ctrl_en_val);
+	if (ret) {
+		dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_enable(led_data->priv->regulator);
+	if (ret < 0)
+		return ret;
+
+	led_data->enabled = 1;
+
+	return 0;
+}
+
+/* Caller must take care of locking */
+static int lm3532_led_disable(struct lm3532_led *led_data)
+{
+	int ctrl_en_val = BIT(led_data->control_bank);
+	int ret;
+
+	if (!led_data->enabled)
+		return 0;
+
+	ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
+					 ctrl_en_val, 0);
+	if (ret) {
+		dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_disable(led_data->priv->regulator);
+	if (ret < 0)
+		return ret;
+
+	led_data->enabled = 0;
+
+	return 0;
+}
+
+static int lm3532_brightness_set(struct led_classdev *led_cdev,
+				 enum led_brightness brt_val)
+{
+	struct lm3532_led *led =
+			container_of(led_cdev, struct lm3532_led, led_dev);
+	u8 brightness_reg;
+	int ret;
+
+	mutex_lock(&led->priv->lock);
+
+	if (led->mode == LM3532_ALS_CTRL) {
+		if (brt_val > LED_OFF)
+			ret = lm3532_led_enable(led);
+		else
+			ret = lm3532_led_disable(led);
+
+		goto unlock;
+	}
+
+	if (brt_val == LED_OFF) {
+		ret = lm3532_led_disable(led);
+		goto unlock;
+	}
+
+	ret = lm3532_led_enable(led);
+	if (ret)
+		goto unlock;
+
+	brightness_reg = LM3532_REG_ZONE_TRGT_A + led->control_bank * 5 +
+			 (led->ctrl_brt_pointer >> 2);
+
+	ret = regmap_write(led->priv->regmap, brightness_reg, brt_val);
+
+unlock:
+	mutex_unlock(&led->priv->lock);
+	return ret;
+}
+
+static int lm3532_init_registers(struct lm3532_led *led)
+{
+	struct lm3532_data *drvdata = led->priv;
+	unsigned int runtime_ramp_val;
+	unsigned int output_cfg_val = 0;
+	unsigned int output_cfg_shift = 0;
+	unsigned int output_cfg_mask = 0;
+	unsigned int brightness_config_reg;
+	unsigned int brightness_config_val;
+	int fs_current_reg;
+	int fs_current_val;
+	int ret, i;
+
+	if (drvdata->enable_gpio)
+		gpiod_direction_output(drvdata->enable_gpio, 1);
+
+	brightness_config_reg = LM3532_REG_ZONE_CFG_A + led->control_bank * 2;
+	/*
+	 * This could be hard coded to the default value but the control
+	 * brightness register may have changed during boot.
+	 */
+	ret = regmap_read(drvdata->regmap, brightness_config_reg,
+			  &led->ctrl_brt_pointer);
+	if (ret)
+		return ret;
+
+	led->ctrl_brt_pointer &= LM3532_ZONE_MASK;
+	brightness_config_val = led->ctrl_brt_pointer | led->mode;
+	ret = regmap_write(drvdata->regmap, brightness_config_reg,
+			   brightness_config_val);
+	if (ret)
+		return ret;
+
+	if (led->full_scale_current) {
+		fs_current_reg = LM3532_REG_CTRL_A_FS_CURR + led->control_bank * 2;
+		fs_current_val = (led->full_scale_current - LM3532_FS_CURR_MIN) /
+				 LM3532_FS_CURR_STEP;
+
+		ret = regmap_write(drvdata->regmap, fs_current_reg,
+				   fs_current_val);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < led->num_leds; i++) {
+		output_cfg_shift = led->led_strings[i] * 2;
+		output_cfg_val |= (led->control_bank << output_cfg_shift);
+		output_cfg_mask |= LM3532_OUTPUT_CFG_MASK << output_cfg_shift;
+	}
+
+	ret = regmap_update_bits(drvdata->regmap, LM3532_REG_OUTPUT_CFG,
+				 output_cfg_mask, output_cfg_val);
+	if (ret)
+		return ret;
+
+	runtime_ramp_val = drvdata->runtime_ramp_up |
+			 (drvdata->runtime_ramp_down << LM3532_RAMP_DOWN_SHIFT);
+
+	return regmap_write(drvdata->regmap, LM3532_REG_RT_RAMP,
+			    runtime_ramp_val);
+}
+
+static int lm3532_als_configure(struct lm3532_data *priv,
+				struct lm3532_led *led)
+{
+	struct lm3532_als_data *als = priv->als_data;
+	u32 als_vmin, als_vmax, als_vstep;
+	int zone_reg = LM3532_REG_ZN_0_HI;
+	int ret;
+	int i;
+
+	als_vmin = als->als_vmin;
+	als_vmax = als->als_vmax;
+
+	als_vstep = (als_vmax - als_vmin) / ((LM3532_ALS_ZB_MAX + 1) * 2);
+
+	for (i = 0; i < LM3532_ALS_ZB_MAX; i++) {
+		als->zones_lo[i] = ((als_vmin + als_vstep + (i * als_vstep)) *
+				LED_FULL) / 1000;
+		als->zones_hi[i] = ((als_vmin + LM3532_ALS_OFFSET_mV +
+				als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
+
+		zone_reg = LM3532_REG_ZN_0_HI + i * 2;
+		ret = regmap_write(priv->regmap, zone_reg, als->zones_lo[i]);
+		if (ret)
+			return ret;
+
+		zone_reg += 1;
+		ret = regmap_write(priv->regmap, zone_reg, als->zones_hi[i]);
+		if (ret)
+			return ret;
+	}
+
+	als->config = (als->als_avrg_time | (LM3532_ENABLE_ALS) |
+		(als->als_input_mode << LM3532_ALS_SEL_SHIFT));
+
+	return regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config);
+}
+
+static int lm3532_parse_als(struct lm3532_data *priv)
+{
+	struct lm3532_als_data *als;
+	int als_avg_time;
+	int als_impedance;
+	int ret;
+
+	als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL);
+	if (als == NULL)
+		return -ENOMEM;
+
+	ret = device_property_read_u32(&priv->client->dev, "ti,als-vmin",
+				       &als->als_vmin);
+	if (ret)
+		als->als_vmin = 0;
+
+	ret = device_property_read_u32(&priv->client->dev, "ti,als-vmax",
+				       &als->als_vmax);
+	if (ret)
+		als->als_vmax = LM3532_ALS_WINDOW_mV;
+
+	if (als->als_vmax > LM3532_ALS_WINDOW_mV) {
+		ret = -EINVAL;
+		return ret;
+	}
+
+	ret = device_property_read_u32(&priv->client->dev, "ti,als1-imp-sel",
+				      &als_impedance);
+	if (ret)
+		als->als1_imp_sel = 0;
+	else
+		als->als1_imp_sel = lm3532_get_als_imp_index(als_impedance);
+
+	ret = device_property_read_u32(&priv->client->dev, "ti,als2-imp-sel",
+				      &als_impedance);
+	if (ret)
+		als->als2_imp_sel = 0;
+	else
+		als->als2_imp_sel = lm3532_get_als_imp_index(als_impedance);
+
+	ret = device_property_read_u32(&priv->client->dev, "ti,als-avrg-time-us",
+				      &als_avg_time);
+	if (ret)
+		als->als_avrg_time = 0;
+	else
+		als->als_avrg_time = lm3532_get_als_avg_index(als_avg_time);
+
+	ret = device_property_read_u8(&priv->client->dev, "ti,als-input-mode",
+				      &als->als_input_mode);
+	if (ret)
+		als->als_input_mode = 0;
+
+	if (als->als_input_mode > LM3532_BL_MODE_ALS) {
+		ret = -EINVAL;
+		return ret;
+	}
+
+	priv->als_data = als;
+
+	return ret;
+}
+
+static int lm3532_parse_node(struct lm3532_data *priv)
+{
+	struct fwnode_handle *child = NULL;
+	struct lm3532_led *led;
+	int control_bank;
+	u32 ramp_time;
+	size_t i = 0;
+	int ret;
+
+	priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
+						   "enable", GPIOD_OUT_LOW);
+	if (IS_ERR(priv->enable_gpio))
+		priv->enable_gpio = NULL;
+
+	priv->regulator = devm_regulator_get(&priv->client->dev, "vin");
+	if (IS_ERR(priv->regulator))
+		priv->regulator = NULL;
+
+	ret = device_property_read_u32(&priv->client->dev, "ramp-up-us",
+				       &ramp_time);
+	if (ret)
+		dev_info(&priv->client->dev, "ramp-up-ms property missing\n");
+	else
+		priv->runtime_ramp_up = lm3532_get_ramp_index(ramp_time);
+
+	ret = device_property_read_u32(&priv->client->dev, "ramp-down-us",
+				       &ramp_time);
+	if (ret)
+		dev_info(&priv->client->dev, "ramp-down-ms property missing\n");
+	else
+		priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time);
+
+	device_for_each_child_node(priv->dev, child) {
+		struct led_init_data idata = {
+			.fwnode = child,
+			.default_label = ":",
+			.devicename = priv->client->name,
+		};
+
+		led = &priv->leds[i];
+
+		ret = fwnode_property_read_u32(child, "reg", &control_bank);
+		if (ret) {
+			dev_err(&priv->client->dev, "reg property missing\n");
+			goto child_out;
+		}
+
+		if (control_bank > LM3532_CONTROL_C) {
+			dev_err(&priv->client->dev, "Control bank invalid\n");
+			continue;
+		}
+
+		led->control_bank = control_bank;
+
+		ret = fwnode_property_read_u32(child, "ti,led-mode",
+					       &led->mode);
+		if (ret) {
+			dev_err(&priv->client->dev, "ti,led-mode property missing\n");
+			goto child_out;
+		}
+
+		if (fwnode_property_present(child, "led-max-microamp") &&
+		    fwnode_property_read_u32(child, "led-max-microamp",
+					     &led->full_scale_current))
+			dev_err(&priv->client->dev,
+				"Failed getting led-max-microamp\n");
+		else
+			led->full_scale_current = min(led->full_scale_current,
+						      LM3532_FS_CURR_MAX);
+
+		if (led->mode == LM3532_BL_MODE_ALS) {
+			led->mode = LM3532_ALS_CTRL;
+			ret = lm3532_parse_als(priv);
+			if (ret)
+				dev_err(&priv->client->dev, "Failed to parse als\n");
+			else
+				lm3532_als_configure(priv, led);
+		} else {
+			led->mode = LM3532_I2C_CTRL;
+		}
+
+		led->num_leds = fwnode_property_count_u32(child, "led-sources");
+		if (led->num_leds > LM3532_MAX_LED_STRINGS) {
+			dev_err(&priv->client->dev, "Too many LED string defined\n");
+			continue;
+		}
+
+		ret = fwnode_property_read_u32_array(child, "led-sources",
+						    led->led_strings,
+						    led->num_leds);
+		if (ret) {
+			dev_err(&priv->client->dev, "led-sources property missing\n");
+			goto child_out;
+		}
+
+		led->priv = priv;
+		led->led_dev.brightness_set_blocking = lm3532_brightness_set;
+
+		ret = devm_led_classdev_register_ext(priv->dev, &led->led_dev, &idata);
+		if (ret) {
+			dev_err(&priv->client->dev, "led register err: %d\n",
+				ret);
+			goto child_out;
+		}
+
+		ret = lm3532_init_registers(led);
+		if (ret) {
+			dev_err(&priv->client->dev, "register init err: %d\n",
+				ret);
+			goto child_out;
+		}
+
+		i++;
+	}
+	return 0;
+
+child_out:
+	fwnode_handle_put(child);
+	return ret;
+}
+
+static int lm3532_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	struct lm3532_data *drvdata;
+	int ret = 0;
+	int count;
+
+	count = device_get_child_node_count(&client->dev);
+	if (!count) {
+		dev_err(&client->dev, "LEDs are not defined in device tree!");
+		return -ENODEV;
+	}
+
+	drvdata = devm_kzalloc(&client->dev, struct_size(drvdata, leds, count),
+			   GFP_KERNEL);
+	if (drvdata == NULL)
+		return -ENOMEM;
+
+	drvdata->client = client;
+	drvdata->dev = &client->dev;
+
+	drvdata->regmap = devm_regmap_init_i2c(client, &lm3532_regmap_config);
+	if (IS_ERR(drvdata->regmap)) {
+		ret = PTR_ERR(drvdata->regmap);
+		dev_err(&client->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	mutex_init(&drvdata->lock);
+	i2c_set_clientdata(client, drvdata);
+
+	ret = lm3532_parse_node(drvdata);
+	if (ret) {
+		dev_err(&client->dev, "Failed to parse node\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static void lm3532_remove(struct i2c_client *client)
+{
+	struct lm3532_data *drvdata = i2c_get_clientdata(client);
+
+	mutex_destroy(&drvdata->lock);
+
+	if (drvdata->enable_gpio)
+		gpiod_direction_output(drvdata->enable_gpio, 0);
+}
+
+static const struct of_device_id of_lm3532_leds_match[] = {
+	{ .compatible = "ti,lm3532", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_lm3532_leds_match);
+
+static const struct i2c_device_id lm3532_id[] = {
+	{LM3532_NAME, 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, lm3532_id);
+
+static struct i2c_driver lm3532_i2c_driver = {
+	.probe = lm3532_probe,
+	.remove = lm3532_remove,
+	.id_table = lm3532_id,
+	.driver = {
+		.name = LM3532_NAME,
+		.of_match_table = of_lm3532_leds_match,
+	},
+};
+module_i2c_driver(lm3532_i2c_driver);
+
+MODULE_DESCRIPTION("Back Light driver for LM3532");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");