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, 690 insertions, 0 deletions

diff --git a/drivers/power/supply/ucs1002_power.c b/drivers/power/supply/ucs1002_power.c
new file mode 100644
index 000000000..836d44c9f
--- /dev/null
+++ b/drivers/power/supply/ucs1002_power.c
@@ -0,0 +1,690 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for UCS1002 Programmable USB Port Power Controller
+ *
+ * Copyright (C) 2019 Zodiac Inflight Innovations
+ */
+#include <linux/bits.h>
+#include <linux/freezer.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+/* UCS1002 Registers */
+#define UCS1002_REG_CURRENT_MEASUREMENT	0x00
+
+/*
+ * The Total Accumulated Charge registers store the total accumulated
+ * charge delivered from the VS source to a portable device. The total
+ * value is calculated using four registers, from 01h to 04h. The bit
+ * weighting of the registers is given in mA/hrs.
+ */
+#define UCS1002_REG_TOTAL_ACC_CHARGE	0x01
+
+/* Other Status Register */
+#define UCS1002_REG_OTHER_STATUS	0x0f
+#  define F_ADET_PIN			BIT(4)
+#  define F_CHG_ACT			BIT(3)
+
+/* Interrupt Status */
+#define UCS1002_REG_INTERRUPT_STATUS	0x10
+#  define F_ERR				BIT(7)
+#  define F_DISCHARGE_ERR		BIT(6)
+#  define F_RESET			BIT(5)
+#  define F_MIN_KEEP_OUT		BIT(4)
+#  define F_TSD				BIT(3)
+#  define F_OVER_VOLT			BIT(2)
+#  define F_BACK_VOLT			BIT(1)
+#  define F_OVER_ILIM			BIT(0)
+
+/* Pin Status Register */
+#define UCS1002_REG_PIN_STATUS		0x14
+#  define UCS1002_PWR_STATE_MASK	0x03
+#  define F_PWR_EN_PIN			BIT(6)
+#  define F_M2_PIN			BIT(5)
+#  define F_M1_PIN			BIT(4)
+#  define F_EM_EN_PIN			BIT(3)
+#  define F_SEL_PIN			BIT(2)
+#  define F_ACTIVE_MODE_MASK		GENMASK(5, 3)
+#  define F_ACTIVE_MODE_PASSTHROUGH	F_M2_PIN
+#  define F_ACTIVE_MODE_DEDICATED	F_EM_EN_PIN
+#  define F_ACTIVE_MODE_BC12_DCP	(F_M2_PIN | F_EM_EN_PIN)
+#  define F_ACTIVE_MODE_BC12_SDP	F_M1_PIN
+#  define F_ACTIVE_MODE_BC12_CDP	(F_M1_PIN | F_M2_PIN | F_EM_EN_PIN)
+
+/* General Configuration Register */
+#define UCS1002_REG_GENERAL_CFG		0x15
+#  define F_RATION_EN			BIT(3)
+
+/* Emulation Configuration Register */
+#define UCS1002_REG_EMU_CFG		0x16
+
+/* Switch Configuration Register */
+#define UCS1002_REG_SWITCH_CFG		0x17
+#  define F_PIN_IGNORE			BIT(7)
+#  define F_EM_EN_SET			BIT(5)
+#  define F_M2_SET			BIT(4)
+#  define F_M1_SET			BIT(3)
+#  define F_S0_SET			BIT(2)
+#  define F_PWR_EN_SET			BIT(1)
+#  define F_LATCH_SET			BIT(0)
+#  define V_SET_ACTIVE_MODE_MASK	GENMASK(5, 3)
+#  define V_SET_ACTIVE_MODE_PASSTHROUGH	F_M2_SET
+#  define V_SET_ACTIVE_MODE_DEDICATED	F_EM_EN_SET
+#  define V_SET_ACTIVE_MODE_BC12_DCP	(F_M2_SET | F_EM_EN_SET)
+#  define V_SET_ACTIVE_MODE_BC12_SDP	F_M1_SET
+#  define V_SET_ACTIVE_MODE_BC12_CDP	(F_M1_SET | F_M2_SET | F_EM_EN_SET)
+
+/* Current Limit Register */
+#define UCS1002_REG_ILIMIT		0x19
+#  define UCS1002_ILIM_SW_MASK		GENMASK(3, 0)
+
+/* Product ID */
+#define UCS1002_REG_PRODUCT_ID		0xfd
+#  define UCS1002_PRODUCT_ID		0x4e
+
+/* Manufacture name */
+#define UCS1002_MANUFACTURER		"SMSC"
+
+struct ucs1002_info {
+	struct power_supply *charger;
+	struct i2c_client *client;
+	struct regmap *regmap;
+	struct regulator_desc *regulator_descriptor;
+	struct regulator_dev *rdev;
+	bool present;
+	bool output_disable;
+	struct delayed_work health_poll;
+	int health;
+
+};
+
+static enum power_supply_property ucs1002_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CURRENT_MAX,
+	POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */
+	POWER_SUPPLY_PROP_MANUFACTURER,
+	POWER_SUPPLY_PROP_USB_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+};
+
+static int ucs1002_get_online(struct ucs1002_info *info,
+			      union power_supply_propval *val)
+{
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, &reg);
+	if (ret)
+		return ret;
+
+	val->intval = !!(reg & F_CHG_ACT);
+
+	return 0;
+}
+
+static int ucs1002_get_charge(struct ucs1002_info *info,
+			      union power_supply_propval *val)
+{
+	/*
+	 * To fit within 32 bits some values are rounded (uA/h)
+	 *
+	 * For Total Accumulated Charge Middle Low Byte register, addr
+	 * 03h, byte 2
+	 *
+	 *   B0: 0.01084 mA/h rounded to 11 uA/h
+	 *   B1: 0.02169 mA/h rounded to 22 uA/h
+	 *   B2: 0.04340 mA/h rounded to 43 uA/h
+	 *   B3: 0.08676 mA/h rounded to 87 uA/h
+	 *   B4: 0.17350 mA/h rounded to 173 uÁ/h
+	 *
+	 * For Total Accumulated Charge Low Byte register, addr 04h,
+	 * byte 3
+	 *
+	 *   B6: 0.00271 mA/h rounded to 3 uA/h
+	 *   B7: 0.005422 mA/h rounded to 5 uA/h
+	 */
+	static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = {
+		/*
+		 * Bit corresponding to low byte (offset 0x04)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		0, 0, 0, 0, 0, 0, 3, 5,
+		/*
+		 * Bit corresponding to middle low byte (offset 0x03)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		11, 22, 43, 87, 173, 347, 694, 1388,
+		/*
+		 * Bit corresponding to middle high byte (offset 0x02)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400,
+		/*
+		 * Bit corresponding to high byte (offset 0x01)
+		 * B0 B1 B2 B3 B4 B5 B6 B7
+		 */
+		710700, 1421000, 2843000, 5685000, 11371000, 22742000,
+		45484000, 90968000,
+	};
+	unsigned long total_acc_charger;
+	unsigned int reg;
+	int i, ret;
+
+	ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE,
+			       &reg, sizeof(u32));
+	if (ret)
+		return ret;
+
+	total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */
+	val->intval = 0;
+
+	for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh))
+		val->intval += bit_weights_uAh[i];
+
+	return 0;
+}
+
+static int ucs1002_get_current(struct ucs1002_info *info,
+			       union power_supply_propval *val)
+{
+	/*
+	 * The Current Measurement register stores the measured
+	 * current value delivered to the portable device. The range
+	 * is from 9.76 mA to 2.5 A.
+	 */
+	static const int bit_weights_uA[BITS_PER_TYPE(u8)] = {
+		9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300,
+	};
+	unsigned long current_measurement;
+	unsigned int reg;
+	int i, ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, &reg);
+	if (ret)
+		return ret;
+
+	current_measurement = reg;
+	val->intval = 0;
+
+	for_each_set_bit(i, &current_measurement, ARRAY_SIZE(bit_weights_uA))
+		val->intval += bit_weights_uA[i];
+
+	return 0;
+}
+
+/*
+ * The Current Limit register stores the maximum current used by the
+ * port switch. The range is from 500mA to 2.5 A.
+ */
+static const u32 ucs1002_current_limit_uA[] = {
+	500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000,
+};
+
+static int ucs1002_get_max_current(struct ucs1002_info *info,
+				   union power_supply_propval *val)
+{
+	unsigned int reg;
+	int ret;
+
+	if (info->output_disable) {
+		val->intval = 0;
+		return 0;
+	}
+
+	ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, &reg);
+	if (ret)
+		return ret;
+
+	val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK];
+
+	return 0;
+}
+
+static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val)
+{
+	unsigned int reg;
+	int ret, idx;
+
+	if (val == 0) {
+		info->output_disable = true;
+		regulator_disable_regmap(info->rdev);
+		return 0;
+	}
+
+	for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) {
+		if (val == ucs1002_current_limit_uA[idx])
+			break;
+	}
+
+	if (idx == ARRAY_SIZE(ucs1002_current_limit_uA))
+		return -EINVAL;
+
+	ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx);
+	if (ret)
+		return ret;
+	/*
+	 * Any current limit setting exceeding the one set via ILIM
+	 * pin will be rejected, so we read out freshly changed limit
+	 * to make sure that it took effect.
+	 */
+	ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, &reg);
+	if (ret)
+		return ret;
+
+	if (reg != idx)
+		return -EINVAL;
+
+	info->output_disable = false;
+
+	if (info->rdev && info->rdev->use_count &&
+	    !regulator_is_enabled_regmap(info->rdev))
+		regulator_enable_regmap(info->rdev);
+
+	return 0;
+}
+
+static enum power_supply_usb_type ucs1002_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_PD,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+};
+
+static int ucs1002_set_usb_type(struct ucs1002_info *info, int val)
+{
+	unsigned int mode;
+
+	if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types))
+		return -EINVAL;
+
+	switch (ucs1002_usb_types[val]) {
+	case POWER_SUPPLY_USB_TYPE_PD:
+		mode = V_SET_ACTIVE_MODE_DEDICATED;
+		break;
+	case POWER_SUPPLY_USB_TYPE_SDP:
+		mode = V_SET_ACTIVE_MODE_BC12_SDP;
+		break;
+	case POWER_SUPPLY_USB_TYPE_DCP:
+		mode = V_SET_ACTIVE_MODE_BC12_DCP;
+		break;
+	case POWER_SUPPLY_USB_TYPE_CDP:
+		mode = V_SET_ACTIVE_MODE_BC12_CDP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
+				  V_SET_ACTIVE_MODE_MASK, mode);
+}
+
+static int ucs1002_get_usb_type(struct ucs1002_info *info,
+				union power_supply_propval *val)
+{
+	enum power_supply_usb_type type;
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, &reg);
+	if (ret)
+		return ret;
+
+	switch (reg & F_ACTIVE_MODE_MASK) {
+	default:
+		type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		break;
+	case F_ACTIVE_MODE_DEDICATED:
+		type = POWER_SUPPLY_USB_TYPE_PD;
+		break;
+	case F_ACTIVE_MODE_BC12_SDP:
+		type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case F_ACTIVE_MODE_BC12_DCP:
+		type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case F_ACTIVE_MODE_BC12_CDP:
+		type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	}
+
+	val->intval = type;
+
+	return 0;
+}
+
+static int ucs1002_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct ucs1002_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		return ucs1002_get_online(info, val);
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		return ucs1002_get_charge(info, val);
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		return ucs1002_get_current(info, val);
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		return ucs1002_get_max_current(info, val);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return ucs1002_get_usb_type(info, val);
+	case POWER_SUPPLY_PROP_HEALTH:
+		return val->intval = info->health;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = info->present;
+		return 0;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = UCS1002_MANUFACTURER;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ucs1002_set_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				const union power_supply_propval *val)
+{
+	struct ucs1002_info *info = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		return ucs1002_set_max_current(info, val->intval);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return ucs1002_set_usb_type(info, val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ucs1002_property_is_writeable(struct power_supply *psy,
+					 enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct power_supply_desc ucs1002_charger_desc = {
+	.name			= "ucs1002",
+	.type			= POWER_SUPPLY_TYPE_USB,
+	.usb_types		= ucs1002_usb_types,
+	.num_usb_types		= ARRAY_SIZE(ucs1002_usb_types),
+	.get_property		= ucs1002_get_property,
+	.set_property		= ucs1002_set_property,
+	.property_is_writeable	= ucs1002_property_is_writeable,
+	.properties		= ucs1002_props,
+	.num_properties		= ARRAY_SIZE(ucs1002_props),
+};
+
+static void ucs1002_health_poll(struct work_struct *work)
+{
+	struct ucs1002_info *info = container_of(work, struct ucs1002_info,
+						 health_poll.work);
+	int ret;
+	u32 reg;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, &reg);
+	if (ret)
+		return;
+
+	/* bad health and no status change, just schedule us again in a while */
+	if ((reg & F_ERR) && info->health != POWER_SUPPLY_HEALTH_GOOD) {
+		schedule_delayed_work(&info->health_poll,
+				      msecs_to_jiffies(2000));
+		return;
+	}
+
+	if (reg & F_TSD)
+		info->health = POWER_SUPPLY_HEALTH_OVERHEAT;
+	else if (reg & (F_OVER_VOLT | F_BACK_VOLT))
+		info->health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+	else if (reg & F_OVER_ILIM)
+		info->health = POWER_SUPPLY_HEALTH_OVERCURRENT;
+	else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT))
+		info->health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+	else
+		info->health = POWER_SUPPLY_HEALTH_GOOD;
+
+	sysfs_notify(&info->charger->dev.kobj, NULL, "health");
+}
+
+static irqreturn_t ucs1002_charger_irq(int irq, void *data)
+{
+	int ret, regval;
+	bool present;
+	struct ucs1002_info *info = data;
+
+	present = info->present;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, &regval);
+	if (ret)
+		return IRQ_HANDLED;
+
+	/* update attached status */
+	info->present = regval & F_ADET_PIN;
+
+	/* notify the change */
+	if (present != info->present)
+		power_supply_changed(info->charger);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ucs1002_alert_irq(int irq, void *data)
+{
+	struct ucs1002_info *info = data;
+
+	mod_delayed_work(system_wq, &info->health_poll, 0);
+
+	return IRQ_HANDLED;
+}
+
+static int ucs1002_regulator_enable(struct regulator_dev *rdev)
+{
+	struct ucs1002_info *info = rdev_get_drvdata(rdev);
+
+	/*
+	 * If the output is disabled due to 0 maximum current, just pretend the
+	 * enable did work. The regulator will be enabled as soon as we get a
+	 * a non-zero maximum current budget.
+	 */
+	if (info->output_disable)
+		return 0;
+
+	return regulator_enable_regmap(rdev);
+}
+
+static const struct regulator_ops ucs1002_regulator_ops = {
+	.is_enabled	= regulator_is_enabled_regmap,
+	.enable		= ucs1002_regulator_enable,
+	.disable	= regulator_disable_regmap,
+};
+
+static const struct regulator_desc ucs1002_regulator_descriptor = {
+	.name		= "ucs1002-vbus",
+	.ops		= &ucs1002_regulator_ops,
+	.type		= REGULATOR_VOLTAGE,
+	.owner		= THIS_MODULE,
+	.enable_reg	= UCS1002_REG_SWITCH_CFG,
+	.enable_mask	= F_PWR_EN_SET,
+	.enable_val	= F_PWR_EN_SET,
+	.fixed_uV	= 5000000,
+	.n_voltages	= 1,
+};
+
+static int ucs1002_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct power_supply_config charger_config = {};
+	const struct regmap_config regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+	};
+	struct regulator_config regulator_config = {};
+	int irq_a_det, irq_alert, ret;
+	struct ucs1002_info *info;
+	unsigned int regval;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->regmap = devm_regmap_init_i2c(client, &regmap_config);
+	ret = PTR_ERR_OR_ZERO(info->regmap);
+	if (ret) {
+		dev_err(dev, "Regmap initialization failed: %d\n", ret);
+		return ret;
+	}
+
+	info->client = client;
+
+	irq_a_det = of_irq_get_byname(dev->of_node, "a_det");
+	irq_alert = of_irq_get_byname(dev->of_node, "alert");
+
+	charger_config.of_node = dev->of_node;
+	charger_config.drv_data = info;
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, &regval);
+	if (ret) {
+		dev_err(dev, "Failed to read product ID: %d\n", ret);
+		return ret;
+	}
+
+	if (regval != UCS1002_PRODUCT_ID) {
+		dev_err(dev,
+			"Product ID does not match (0x%02x != 0x%02x)\n",
+			regval, UCS1002_PRODUCT_ID);
+		return -ENODEV;
+	}
+
+	/* Enable charge rationing by default */
+	ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG,
+				 F_RATION_EN, F_RATION_EN);
+	if (ret) {
+		dev_err(dev, "Failed to read general config: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active
+	 * mode selection to BC1.2 CDP.
+	 */
+	ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
+				 V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE,
+				 V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE);
+	if (ret) {
+		dev_err(dev, "Failed to configure default mode: %d\n", ret);
+		return ret;
+	}
+	/*
+	 * Be safe and set initial current limit to 500mA
+	 */
+	ret = ucs1002_set_max_current(info, 500000);
+	if (ret) {
+		dev_err(dev, "Failed to set max current default: %d\n", ret);
+		return ret;
+	}
+
+	info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc,
+						   &charger_config);
+	ret = PTR_ERR_OR_ZERO(info->charger);
+	if (ret) {
+		dev_err(dev, "Failed to register power supply: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, &regval);
+	if (ret) {
+		dev_err(dev, "Failed to read pin status: %d\n", ret);
+		return ret;
+	}
+
+	info->regulator_descriptor =
+		devm_kmemdup(dev, &ucs1002_regulator_descriptor,
+			     sizeof(ucs1002_regulator_descriptor),
+			     GFP_KERNEL);
+	if (!info->regulator_descriptor)
+		return -ENOMEM;
+
+	info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN);
+
+	regulator_config.dev = dev;
+	regulator_config.of_node = dev->of_node;
+	regulator_config.regmap = info->regmap;
+	regulator_config.driver_data = info;
+
+	info->rdev = devm_regulator_register(dev, info->regulator_descriptor,
+				       &regulator_config);
+	ret = PTR_ERR_OR_ZERO(info->rdev);
+	if (ret) {
+		dev_err(dev, "Failed to register VBUS regulator: %d\n", ret);
+		return ret;
+	}
+
+	info->health = POWER_SUPPLY_HEALTH_GOOD;
+	INIT_DELAYED_WORK(&info->health_poll, ucs1002_health_poll);
+
+	if (irq_a_det > 0) {
+		ret = devm_request_threaded_irq(dev, irq_a_det, NULL,
+						ucs1002_charger_irq,
+						IRQF_ONESHOT,
+						"ucs1002-a_det", info);
+		if (ret) {
+			dev_err(dev, "Failed to request A_DET threaded irq: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	if (irq_alert > 0) {
+		ret = devm_request_irq(dev, irq_alert, ucs1002_alert_irq,
+				       0,"ucs1002-alert", info);
+		if (ret) {
+			dev_err(dev, "Failed to request ALERT threaded irq: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id ucs1002_of_match[] = {
+	{ .compatible = "microchip,ucs1002", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ucs1002_of_match);
+
+static struct i2c_driver ucs1002_driver = {
+	.driver = {
+		   .name = "ucs1002",
+		   .of_match_table = ucs1002_of_match,
+	},
+	.probe_new = ucs1002_probe,
+};
+module_i2c_driver(ucs1002_driver);
+
+MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller");
+MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>");
+MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
+MODULE_LICENSE("GPL");