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, 930 insertions, 0 deletions

diff --git a/drivers/power/supply/ltc4162-l-charger.c b/drivers/power/supply/ltc4162-l-charger.c
new file mode 100644
index 000000000..db2bb5233
--- /dev/null
+++ b/drivers/power/supply/ltc4162-l-charger.c
@@ -0,0 +1,930 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Driver for Analog Devices (Linear Technology) LTC4162-L charger IC.
+ *  Copyright (C) 2020, Topic Embedded Products
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/power_supply.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+/* Registers (names based on what datasheet uses) */
+#define LTC4162L_EN_LIMIT_ALERTS_REG		0x0D
+#define LTC4162L_EN_CHARGER_STATE_ALERTS_REG	0x0E
+#define LTC4162L_EN_CHARGE_STATUS_ALERTS_REG	0x0F
+#define LTC4162L_CONFIG_BITS_REG		0x14
+#define LTC4162L_IIN_LIMIT_TARGET		0x15
+#define LTC4162L_ARM_SHIP_MODE			0x19
+#define LTC4162L_CHARGE_CURRENT_SETTING		0X1A
+#define LTC4162L_VCHARGE_SETTING		0X1B
+#define LTC4162L_C_OVER_X_THRESHOLD		0x1C
+#define LTC4162L_MAX_CV_TIME			0X1D
+#define LTC4162L_MAX_CHARGE_TIME		0X1E
+#define LTC4162L_CHARGER_CONFIG_BITS		0x29
+#define LTC4162L_CHARGER_STATE			0x34
+#define LTC4162L_CHARGE_STATUS			0x35
+#define LTC4162L_LIMIT_ALERTS_REG		0x36
+#define LTC4162L_CHARGER_STATE_ALERTS_REG	0x37
+#define LTC4162L_CHARGE_STATUS_ALERTS_REG	0x38
+#define LTC4162L_SYSTEM_STATUS_REG		0x39
+#define LTC4162L_VBAT				0x3A
+#define LTC4162L_VIN				0x3B
+#define LTC4162L_VOUT				0x3C
+#define LTC4162L_IBAT				0x3D
+#define LTC4162L_IIN				0x3E
+#define LTC4162L_DIE_TEMPERATURE		0x3F
+#define LTC4162L_THERMISTOR_VOLTAGE		0x40
+#define LTC4162L_BSR				0x41
+#define LTC4162L_JEITA_REGION			0x42
+#define LTC4162L_CHEM_CELLS_REG			0x43
+#define LTC4162L_ICHARGE_DAC			0x44
+#define LTC4162L_VCHARGE_DAC			0x45
+#define LTC4162L_IIN_LIMIT_DAC			0x46
+#define LTC4162L_VBAT_FILT			0x47
+#define LTC4162L_INPUT_UNDERVOLTAGE_DAC		0x4B
+
+/* Enumeration as in datasheet. Individual bits are mutually exclusive. */
+enum ltc4162l_state {
+	battery_detection = 2048,
+	charger_suspended = 256,
+	precharge = 128,   /* trickle on low bat voltage */
+	cc_cv_charge = 64, /* normal charge */
+	ntc_pause = 32,
+	timer_term = 16,
+	c_over_x_term = 8, /* battery is full */
+	max_charge_time_fault = 4,
+	bat_missing_fault = 2,
+	bat_short_fault = 1
+};
+
+/* Individual bits are mutually exclusive. Only active in charging states.*/
+enum ltc4162l_charge_status {
+	ilim_reg_active = 32,
+	thermal_reg_active = 16,
+	vin_uvcl_active = 8,
+	iin_limit_active = 4,
+	constant_current = 2,
+	constant_voltage = 1,
+	charger_off = 0
+};
+
+/* Magic number to write to ARM_SHIP_MODE register */
+#define LTC4162L_ARM_SHIP_MODE_MAGIC 21325
+
+struct ltc4162l_info {
+	struct i2c_client	*client;
+	struct regmap		*regmap;
+	struct power_supply	*charger;
+	u32 rsnsb;	/* Series resistor that sets charge current, microOhm */
+	u32 rsnsi;	/* Series resistor to measure input current, microOhm */
+	u8 cell_count;	/* Number of connected cells, 0 while unknown */
+};
+
+static u8 ltc4162l_get_cell_count(struct ltc4162l_info *info)
+{
+	int ret;
+	unsigned int val;
+
+	/* Once read successfully */
+	if (info->cell_count)
+		return info->cell_count;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHEM_CELLS_REG, &val);
+	if (ret)
+		return 0;
+
+	/* Lower 4 bits is the cell count, or 0 if the chip doesn't know yet */
+	val &= 0x0f;
+	if (!val)
+		return 0;
+
+	/* Once determined, keep the value */
+	info->cell_count = val;
+
+	return val;
+};
+
+/* Convert enum value to POWER_SUPPLY_STATUS value */
+static int ltc4162l_state_decode(enum ltc4162l_state value)
+{
+	switch (value) {
+	case precharge:
+	case cc_cv_charge:
+		return POWER_SUPPLY_STATUS_CHARGING;
+	case c_over_x_term:
+		return POWER_SUPPLY_STATUS_FULL;
+	case bat_missing_fault:
+	case bat_short_fault:
+		return POWER_SUPPLY_STATUS_UNKNOWN;
+	default:
+		return POWER_SUPPLY_STATUS_NOT_CHARGING;
+	}
+};
+
+static int ltc4162l_get_status(struct ltc4162l_info *info,
+			       union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHARGER_STATE, &regval);
+	if (ret) {
+		dev_err(&info->client->dev, "Failed to read CHARGER_STATE\n");
+		return ret;
+	}
+
+	val->intval = ltc4162l_state_decode(regval);
+
+	return 0;
+}
+
+static int ltc4162l_charge_status_decode(enum ltc4162l_charge_status value)
+{
+	if (!value)
+		return POWER_SUPPLY_CHARGE_TYPE_NONE;
+
+	/* constant voltage/current and input_current limit are "fast" modes */
+	if (value <= iin_limit_active)
+		return POWER_SUPPLY_CHARGE_TYPE_FAST;
+
+	/* Anything that's not fast we'll return as trickle */
+	return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+}
+
+static int ltc4162l_get_charge_type(struct ltc4162l_info *info,
+				    union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHARGE_STATUS, &regval);
+	if (ret)
+		return ret;
+
+	val->intval = ltc4162l_charge_status_decode(regval);
+
+	return 0;
+}
+
+static int ltc4162l_state_to_health(enum ltc4162l_state value)
+{
+	switch (value) {
+	case ntc_pause:
+		return POWER_SUPPLY_HEALTH_OVERHEAT;
+	case timer_term:
+		return POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+	case max_charge_time_fault:
+		return POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
+	case bat_missing_fault:
+		return POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+	case bat_short_fault:
+		return POWER_SUPPLY_HEALTH_DEAD;
+	default:
+		return POWER_SUPPLY_HEALTH_GOOD;
+	}
+}
+
+static int ltc4162l_get_health(struct ltc4162l_info *info,
+			       union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHARGER_STATE, &regval);
+	if (ret)
+		return ret;
+
+	val->intval = ltc4162l_state_to_health(regval);
+
+	return 0;
+}
+
+static int ltc4162l_get_online(struct ltc4162l_info *info,
+			       union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_SYSTEM_STATUS_REG, &regval);
+	if (ret)
+		return ret;
+
+	/* BIT(2) indicates if input voltage is sufficient to charge */
+	val->intval = !!(regval & BIT(2));
+
+	return 0;
+}
+
+static int ltc4162l_get_vbat(struct ltc4162l_info *info,
+				  unsigned int reg,
+				  union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, reg, &regval);
+	if (ret)
+		return ret;
+
+	/* cell_count × 192.4μV/LSB */
+	regval *= 1924;
+	regval *= ltc4162l_get_cell_count(info);
+	regval /= 10;
+	val->intval = regval;
+
+	return 0;
+}
+
+static int ltc4162l_get_ibat(struct ltc4162l_info *info,
+			     union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_IBAT, &regval);
+	if (ret)
+		return ret;
+
+	/* Signed 16-bit number, 1.466μV / RSNSB amperes/LSB. */
+	ret = (s16)(regval & 0xFFFF);
+	val->intval = 100 * mult_frac(ret, 14660, (int)info->rsnsb);
+
+	return 0;
+}
+
+
+static int ltc4162l_get_input_voltage(struct ltc4162l_info *info,
+				      union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_VIN, &regval);
+	if (ret)
+		return ret;
+
+	/* 1.649mV/LSB */
+	val->intval =  regval * 1694;
+
+	return 0;
+}
+
+static int ltc4162l_get_input_current(struct ltc4162l_info *info,
+				      union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_IIN, &regval);
+	if (ret)
+		return ret;
+
+	/* Signed 16-bit number, 1.466μV / RSNSI amperes/LSB. */
+	ret = (s16)(regval & 0xFFFF);
+	ret *= 14660;
+	ret /= info->rsnsi;
+	ret *= 100;
+
+	val->intval = ret;
+
+	return 0;
+}
+
+static int ltc4162l_get_icharge(struct ltc4162l_info *info,
+				unsigned int reg,
+				union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, reg, &regval);
+	if (ret)
+		return ret;
+
+	regval &= BIT(6) - 1; /* Only the lower 5 bits */
+
+	/* The charge current servo level: (icharge_dac + 1) × 1mV/RSNSB */
+	++regval;
+	val->intval = 10000u * mult_frac(regval, 100000u, info->rsnsb);
+
+	return 0;
+}
+
+static int ltc4162l_set_icharge(struct ltc4162l_info *info,
+				unsigned int reg,
+				unsigned int value)
+{
+	value = mult_frac(value, info->rsnsb, 100000u);
+	value /= 10000u;
+
+	/* Round to lowest possible */
+	if (value)
+		--value;
+
+	if (value > 31)
+		return -EINVAL;
+
+	return regmap_write(info->regmap, reg, value);
+}
+
+
+static int ltc4162l_get_vcharge(struct ltc4162l_info *info,
+				unsigned int reg,
+				union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+	u32 voltage;
+
+	ret = regmap_read(info->regmap, reg, &regval);
+	if (ret)
+		return ret;
+
+	regval &= BIT(6) - 1; /* Only the lower 5 bits */
+
+	/*
+	 * charge voltage setting can be computed from
+	 * cell_count × (vcharge_setting × 12.5mV + 3.8125V)
+	 * where vcharge_setting ranges from 0 to 31 (4.2V max).
+	 */
+	voltage = 3812500 + (regval * 12500);
+	voltage *= ltc4162l_get_cell_count(info);
+	val->intval = voltage;
+
+	return 0;
+}
+
+static int ltc4162l_set_vcharge(struct ltc4162l_info *info,
+				unsigned int reg,
+				unsigned int value)
+{
+	u8 cell_count = ltc4162l_get_cell_count(info);
+
+	if (!cell_count)
+		return -EBUSY; /* Not available yet, try again later */
+
+	value /= cell_count;
+
+	if (value < 3812500)
+		return -EINVAL;
+
+	value -= 3812500;
+	value /= 12500;
+
+	if (value > 31)
+		return -EINVAL;
+
+	return regmap_write(info->regmap, reg, value);
+}
+
+static int ltc4162l_get_iin_limit_dac(struct ltc4162l_info *info,
+				     union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_IIN_LIMIT_DAC, &regval);
+	if (ret)
+		return ret;
+
+	regval &= BIT(6) - 1; /* Only 6 bits */
+
+	/* (iin_limit_dac + 1) × 500μV / RSNSI */
+	++regval;
+	regval *= 5000000u;
+	regval /= info->rsnsi;
+	val->intval = 100u * regval;
+
+	return 0;
+}
+
+static int ltc4162l_set_iin_limit(struct ltc4162l_info *info,
+				  unsigned int value)
+{
+	unsigned int regval;
+
+	regval = mult_frac(value, info->rsnsi, 50000u);
+	regval /= 10000u;
+	if (regval)
+		--regval;
+	if (regval > 63)
+		regval = 63;
+
+	return regmap_write(info->regmap, LTC4162L_IIN_LIMIT_TARGET, regval);
+}
+
+static int ltc4162l_get_die_temp(struct ltc4162l_info *info,
+				 union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_DIE_TEMPERATURE, &regval);
+	if (ret)
+		return ret;
+
+	/* die_temp × 0.0215°C/LSB - 264.4°C */
+	ret = (s16)(regval & 0xFFFF);
+	ret *= 215;
+	ret /= 100; /* Centidegrees scale */
+	ret -= 26440;
+	val->intval = ret;
+
+	return 0;
+}
+
+static int ltc4162l_get_term_current(struct ltc4162l_info *info,
+				     union power_supply_propval *val)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHARGER_CONFIG_BITS, &regval);
+	if (ret)
+		return ret;
+
+	/* Check if C_OVER_X_THRESHOLD is enabled */
+	if (!(regval & BIT(2))) {
+		val->intval = 0;
+		return 0;
+	}
+
+	ret = regmap_read(info->regmap, LTC4162L_C_OVER_X_THRESHOLD, &regval);
+	if (ret)
+		return ret;
+
+	/* 1.466μV / RSNSB amperes/LSB */
+	regval *= 14660u;
+	regval /= info->rsnsb;
+	val->intval = 100 * regval;
+
+	return 0;
+}
+
+static int ltc4162l_set_term_current(struct ltc4162l_info *info,
+				     unsigned int value)
+{
+	int ret;
+	unsigned int regval;
+
+	if (!value) {
+		/* Disable en_c_over_x_term when set to zero */
+		return regmap_update_bits(info->regmap,
+					  LTC4162L_CHARGER_CONFIG_BITS,
+					  BIT(2), 0);
+	}
+
+	regval = mult_frac(value, info->rsnsb, 14660u);
+	regval /= 100u;
+
+	ret =  regmap_write(info->regmap, LTC4162L_C_OVER_X_THRESHOLD, regval);
+	if (ret)
+		return ret;
+
+	/* Set en_c_over_x_term after changing the threshold value */
+	return regmap_update_bits(info->regmap, LTC4162L_CHARGER_CONFIG_BITS,
+				  BIT(2), BIT(2));
+}
+
+/* Custom properties */
+static const char * const ltc4162l_charge_status_name[] = {
+	"ilim_reg_active", /* 32 */
+	"thermal_reg_active",
+	"vin_uvcl_active",
+	"iin_limit_active",
+	"constant_current",
+	"constant_voltage",
+	"charger_off" /* 0 */
+};
+
+static ssize_t charge_status_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	const char *result = ltc4162l_charge_status_name[
+				ARRAY_SIZE(ltc4162l_charge_status_name) - 1];
+	unsigned int regval;
+	unsigned int mask;
+	unsigned int index;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CHARGE_STATUS, &regval);
+	if (ret)
+		return ret;
+
+	/* Only one bit is set according to datasheet, let's be safe here */
+	for (mask = 32, index = 0; mask != 0; mask >>= 1, ++index) {
+		if (regval & mask) {
+			result = ltc4162l_charge_status_name[index];
+			break;
+		}
+	}
+
+	return sprintf(buf, "%s\n", result);
+}
+static DEVICE_ATTR_RO(charge_status);
+
+static ssize_t vbat_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	union power_supply_propval val;
+	int ret;
+
+	ret = ltc4162l_get_vbat(info, LTC4162L_VBAT, &val);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", val.intval);
+}
+static DEVICE_ATTR_RO(vbat);
+
+static ssize_t vbat_avg_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	union power_supply_propval val;
+	int ret;
+
+	ret = ltc4162l_get_vbat(info, LTC4162L_VBAT_FILT, &val);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", val.intval);
+}
+static DEVICE_ATTR_RO(vbat_avg);
+
+static ssize_t ibat_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	union power_supply_propval val;
+	int ret;
+
+	ret = ltc4162l_get_ibat(info, &val);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%d\n", val.intval);
+}
+static DEVICE_ATTR_RO(ibat);
+
+static ssize_t force_telemetry_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_CONFIG_BITS_REG, &regval);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%u\n", regval & BIT(2) ? 1 : 0);
+}
+
+static ssize_t force_telemetry_store(struct device *dev,
+	struct device_attribute *attr,
+	const char *buf,
+	size_t count)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	int ret;
+	unsigned int value;
+
+	ret = kstrtouint(buf, 0, &value);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_update_bits(info->regmap, LTC4162L_CONFIG_BITS_REG,
+				 BIT(2), value ? BIT(2) : 0);
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(force_telemetry);
+
+static ssize_t arm_ship_mode_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(info->regmap, LTC4162L_ARM_SHIP_MODE, &regval);
+	if (ret)
+		return ret;
+
+	return sprintf(buf, "%u\n",
+		regval == LTC4162L_ARM_SHIP_MODE_MAGIC ? 1 : 0);
+}
+
+static ssize_t arm_ship_mode_store(struct device *dev,
+	struct device_attribute *attr,
+	const char *buf,
+	size_t count)
+{
+	struct power_supply *psy = to_power_supply(dev);
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+	int ret;
+	unsigned int value;
+
+	ret = kstrtouint(buf, 0, &value);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(info->regmap, LTC4162L_ARM_SHIP_MODE,
+				value ? LTC4162L_ARM_SHIP_MODE_MAGIC : 0);
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(arm_ship_mode);
+
+static struct attribute *ltc4162l_sysfs_entries[] = {
+	&dev_attr_charge_status.attr,
+	&dev_attr_ibat.attr,
+	&dev_attr_vbat.attr,
+	&dev_attr_vbat_avg.attr,
+	&dev_attr_force_telemetry.attr,
+	&dev_attr_arm_ship_mode.attr,
+	NULL,
+};
+
+static const struct attribute_group ltc4162l_attr_group = {
+	.name	= NULL,	/* put in device directory */
+	.attrs	= ltc4162l_sysfs_entries,
+};
+
+static const struct attribute_group *ltc4162l_attr_groups[] = {
+	&ltc4162l_attr_group,
+	NULL,
+};
+
+static int ltc4162l_get_property(struct power_supply *psy,
+				 enum power_supply_property psp,
+				 union power_supply_propval *val)
+{
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return ltc4162l_get_status(info, val);
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		return ltc4162l_get_charge_type(info, val);
+	case POWER_SUPPLY_PROP_HEALTH:
+		return ltc4162l_get_health(info, val);
+	case POWER_SUPPLY_PROP_ONLINE:
+		return ltc4162l_get_online(info, val);
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		return ltc4162l_get_input_voltage(info, val);
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		return ltc4162l_get_input_current(info, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return ltc4162l_get_icharge(info,
+				LTC4162L_ICHARGE_DAC, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		return ltc4162l_get_icharge(info,
+				LTC4162L_CHARGE_CURRENT_SETTING, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return ltc4162l_get_vcharge(info,
+				LTC4162L_VCHARGE_DAC, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		return ltc4162l_get_vcharge(info,
+				LTC4162L_VCHARGE_SETTING, val);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return ltc4162l_get_iin_limit_dac(info, val);
+	case POWER_SUPPLY_PROP_TEMP:
+		return ltc4162l_get_die_temp(info, val);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return ltc4162l_get_term_current(info, val);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ltc4162l_set_property(struct power_supply *psy,
+					 enum power_supply_property psp,
+					 const union power_supply_propval *val)
+{
+	struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		return ltc4162l_set_icharge(info,
+				LTC4162L_CHARGE_CURRENT_SETTING, val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		return ltc4162l_set_vcharge(info,
+				LTC4162L_VCHARGE_SETTING, val->intval);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return ltc4162l_set_iin_limit(info, val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return ltc4162l_set_term_current(info, val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ltc4162l_property_is_writeable(struct power_supply *psy,
+						enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+/* Charger power supply property routines */
+static enum power_supply_property ltc4162l_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+};
+
+static const struct power_supply_desc ltc4162l_desc = {
+	.name		= "ltc4162-l",
+	.type		= POWER_SUPPLY_TYPE_MAINS,
+	.properties	= ltc4162l_properties,
+	.num_properties	= ARRAY_SIZE(ltc4162l_properties),
+	.get_property	= ltc4162l_get_property,
+	.set_property	= ltc4162l_set_property,
+	.property_is_writeable = ltc4162l_property_is_writeable,
+};
+
+static bool ltc4162l_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+	/* all registers up to this one are writeable */
+	if (reg <= LTC4162L_CHARGER_CONFIG_BITS)
+		return true;
+
+	/* The ALERTS registers can be written to clear alerts */
+	if (reg >= LTC4162L_LIMIT_ALERTS_REG &&
+	    reg <= LTC4162L_CHARGE_STATUS_ALERTS_REG)
+		return true;
+
+	return false;
+}
+
+static bool ltc4162l_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	/* all registers after this one are read-only status registers */
+	return reg > LTC4162L_CHARGER_CONFIG_BITS;
+}
+
+static const struct regmap_config ltc4162l_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 16,
+	.val_format_endian = REGMAP_ENDIAN_LITTLE,
+	.writeable_reg	= ltc4162l_is_writeable_reg,
+	.volatile_reg	= ltc4162l_is_volatile_reg,
+	.max_register	= LTC4162L_INPUT_UNDERVOLTAGE_DAC,
+	.cache_type	= REGCACHE_RBTREE,
+};
+
+static void ltc4162l_clear_interrupts(struct ltc4162l_info *info)
+{
+	/* Acknowledge interrupt to chip by clearing all events */
+	regmap_write(info->regmap, LTC4162L_LIMIT_ALERTS_REG, 0);
+	regmap_write(info->regmap, LTC4162L_CHARGER_STATE_ALERTS_REG, 0);
+	regmap_write(info->regmap, LTC4162L_CHARGE_STATUS_ALERTS_REG, 0);
+}
+
+static int ltc4162l_probe(struct i2c_client *client)
+{
+	struct i2c_adapter *adapter = client->adapter;
+	struct device *dev = &client->dev;
+	struct ltc4162l_info *info;
+	struct power_supply_config ltc4162l_config = {};
+	u32 value;
+	int ret;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+		dev_err(dev, "No support for SMBUS_WORD_DATA\n");
+		return -ENODEV;
+	}
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->client = client;
+	i2c_set_clientdata(client, info);
+
+	info->regmap = devm_regmap_init_i2c(client, &ltc4162l_regmap_config);
+	if (IS_ERR(info->regmap)) {
+		dev_err(dev, "Failed to initialize register map\n");
+		return PTR_ERR(info->regmap);
+	}
+
+	ret = device_property_read_u32(dev, "lltc,rsnsb-micro-ohms",
+				       &info->rsnsb);
+	if (ret) {
+		dev_err(dev, "Missing lltc,rsnsb-micro-ohms property\n");
+		return ret;
+	}
+	if (!info->rsnsb)
+		return -EINVAL;
+
+	ret = device_property_read_u32(dev, "lltc,rsnsi-micro-ohms",
+				       &info->rsnsi);
+	if (ret) {
+		dev_err(dev, "Missing lltc,rsnsi-micro-ohms property\n");
+		return ret;
+	}
+	if (!info->rsnsi)
+		return -EINVAL;
+
+	if (!device_property_read_u32(dev, "lltc,cell-count", &value))
+		info->cell_count = value;
+
+	ltc4162l_config.of_node = dev->of_node;
+	ltc4162l_config.drv_data = info;
+	ltc4162l_config.attr_grp = ltc4162l_attr_groups;
+
+	info->charger = devm_power_supply_register(dev, &ltc4162l_desc,
+						   &ltc4162l_config);
+	if (IS_ERR(info->charger)) {
+		dev_err(dev, "Failed to register charger\n");
+		return PTR_ERR(info->charger);
+	}
+
+	/* Disable the threshold alerts, we're not using them */
+	regmap_write(info->regmap, LTC4162L_EN_LIMIT_ALERTS_REG, 0);
+
+	/* Enable interrupts on all status changes */
+	regmap_write(info->regmap, LTC4162L_EN_CHARGER_STATE_ALERTS_REG,
+		     0x1fff);
+	regmap_write(info->regmap, LTC4162L_EN_CHARGE_STATUS_ALERTS_REG, 0x1f);
+
+	ltc4162l_clear_interrupts(info);
+
+	return 0;
+}
+
+static void ltc4162l_alert(struct i2c_client *client,
+			   enum i2c_alert_protocol type, unsigned int flag)
+{
+	struct ltc4162l_info *info = i2c_get_clientdata(client);
+
+	if (type != I2C_PROTOCOL_SMBUS_ALERT)
+		return;
+
+	ltc4162l_clear_interrupts(info);
+	power_supply_changed(info->charger);
+}
+
+static const struct i2c_device_id ltc4162l_i2c_id_table[] = {
+	{ "ltc4162-l", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, ltc4162l_i2c_id_table);
+
+static const struct of_device_id ltc4162l_of_match[] = {
+	{ .compatible = "lltc,ltc4162-l", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ltc4162l_of_match);
+
+static struct i2c_driver ltc4162l_driver = {
+	.probe_new	= ltc4162l_probe,
+	.alert		= ltc4162l_alert,
+	.id_table	= ltc4162l_i2c_id_table,
+	.driver = {
+		.name		= "ltc4162-l-charger",
+		.of_match_table	= of_match_ptr(ltc4162l_of_match),
+	},
+};
+module_i2c_driver(ltc4162l_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
+MODULE_DESCRIPTION("LTC4162-L charger driver");