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, 590 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/hycon-hy46xx.c b/drivers/input/touchscreen/hycon-hy46xx.c
new file mode 100644
index 000000000..8f4989aba
--- /dev/null
+++ b/drivers/input/touchscreen/hycon-hy46xx.c
@@ -0,0 +1,590 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/irq.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+
+#include <asm/unaligned.h>
+
+#define HY46XX_CHKSUM_CODE		0x1
+#define HY46XX_FINGER_NUM		0x2
+#define HY46XX_CHKSUM_LEN		0x7
+#define HY46XX_THRESHOLD		0x80
+#define HY46XX_GLOVE_EN			0x84
+#define HY46XX_REPORT_SPEED		0x88
+#define HY46XX_PWR_NOISE_EN		0x89
+#define HY46XX_FILTER_DATA		0x8A
+#define HY46XX_GAIN			0x92
+#define HY46XX_EDGE_OFFSET		0x93
+#define HY46XX_RX_NR_USED		0x94
+#define HY46XX_TX_NR_USED		0x95
+#define HY46XX_PWR_MODE			0xA5
+#define HY46XX_FW_VERSION		0xA6
+#define HY46XX_LIB_VERSION		0xA7
+#define HY46XX_TP_INFO			0xA8
+#define HY46XX_TP_CHIP_ID		0xA9
+#define HY46XX_BOOT_VER			0xB0
+
+#define HY46XX_TPLEN			0x6
+#define HY46XX_REPORT_PKT_LEN		0x44
+
+#define HY46XX_MAX_SUPPORTED_POINTS	11
+
+#define TOUCH_EVENT_DOWN		0x00
+#define TOUCH_EVENT_UP			0x01
+#define TOUCH_EVENT_CONTACT		0x02
+#define TOUCH_EVENT_RESERVED		0x03
+
+struct hycon_hy46xx_data {
+	struct i2c_client *client;
+	struct input_dev *input;
+	struct touchscreen_properties prop;
+	struct regulator *vcc;
+
+	struct gpio_desc *reset_gpio;
+
+	struct mutex mutex;
+	struct regmap *regmap;
+
+	int threshold;
+	bool glove_enable;
+	int report_speed;
+	bool noise_filter_enable;
+	int filter_data;
+	int gain;
+	int edge_offset;
+	int rx_number_used;
+	int tx_number_used;
+	int power_mode;
+	int fw_version;
+	int lib_version;
+	int tp_information;
+	int tp_chip_id;
+	int bootloader_version;
+};
+
+static const struct regmap_config hycon_hy46xx_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static bool hycon_hy46xx_check_checksum(struct hycon_hy46xx_data *tsdata, u8 *buf)
+{
+	u8 chksum = 0;
+	int i;
+
+	for (i = 2; i < buf[HY46XX_CHKSUM_LEN]; i++)
+		chksum += buf[i];
+
+	if (chksum == buf[HY46XX_CHKSUM_CODE])
+		return true;
+
+	dev_err_ratelimited(&tsdata->client->dev,
+			    "checksum error: 0x%02x expected, got 0x%02x\n",
+			    chksum, buf[HY46XX_CHKSUM_CODE]);
+
+	return false;
+}
+
+static irqreturn_t hycon_hy46xx_isr(int irq, void *dev_id)
+{
+	struct hycon_hy46xx_data *tsdata = dev_id;
+	struct device *dev = &tsdata->client->dev;
+	u8 rdbuf[HY46XX_REPORT_PKT_LEN];
+	int i, x, y, id;
+	int error;
+
+	memset(rdbuf, 0, sizeof(rdbuf));
+
+	error = regmap_bulk_read(tsdata->regmap, 0, rdbuf, sizeof(rdbuf));
+	if (error) {
+		dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
+				    error);
+		goto out;
+	}
+
+	if (!hycon_hy46xx_check_checksum(tsdata, rdbuf))
+		goto out;
+
+	for (i = 0; i < HY46XX_MAX_SUPPORTED_POINTS; i++) {
+		u8 *buf = &rdbuf[3 + (HY46XX_TPLEN * i)];
+		int type = buf[0] >> 6;
+
+		if (type == TOUCH_EVENT_RESERVED)
+			continue;
+
+		x = get_unaligned_be16(buf) & 0x0fff;
+		y = get_unaligned_be16(buf + 2) & 0x0fff;
+
+		id = buf[2] >> 4;
+
+		input_mt_slot(tsdata->input, id);
+		if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
+					       type != TOUCH_EVENT_UP))
+			touchscreen_report_pos(tsdata->input, &tsdata->prop,
+					       x, y, true);
+	}
+
+	input_mt_report_pointer_emulation(tsdata->input, false);
+	input_sync(tsdata->input);
+
+out:
+	return IRQ_HANDLED;
+}
+
+struct hycon_hy46xx_attribute {
+	struct device_attribute dattr;
+	size_t field_offset;
+	u8 address;
+	u8 limit_low;
+	u8 limit_high;
+};
+
+#define HYCON_ATTR_U8(_field, _mode, _address, _limit_low, _limit_high)	\
+	struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = {		\
+		.dattr = __ATTR(_field, _mode,				\
+				hycon_hy46xx_setting_show,			\
+				hycon_hy46xx_setting_store),			\
+		.field_offset = offsetof(struct hycon_hy46xx_data, _field),	\
+		.address = _address,					\
+		.limit_low = _limit_low,				\
+		.limit_high = _limit_high,				\
+	}
+
+#define HYCON_ATTR_BOOL(_field, _mode, _address)			\
+	struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = {		\
+		.dattr = __ATTR(_field, _mode,				\
+				hycon_hy46xx_setting_show,			\
+				hycon_hy46xx_setting_store),			\
+		.field_offset = offsetof(struct hycon_hy46xx_data, _field),	\
+		.address = _address,					\
+		.limit_low = false,					\
+		.limit_high = true,					\
+	}
+
+static ssize_t hycon_hy46xx_setting_show(struct device *dev,
+				   struct device_attribute *dattr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client);
+	struct hycon_hy46xx_attribute *attr =
+			container_of(dattr, struct hycon_hy46xx_attribute, dattr);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
+	size_t count = 0;
+	int error = 0;
+	int val;
+
+	mutex_lock(&tsdata->mutex);
+
+	error = regmap_read(tsdata->regmap, attr->address, &val);
+	if (error < 0) {
+		dev_err(&tsdata->client->dev,
+			"Failed to fetch attribute %s, error %d\n",
+			dattr->attr.name, error);
+		goto out;
+	}
+
+	if (val != *field) {
+		dev_warn(&tsdata->client->dev,
+			 "%s: read (%d) and stored value (%d) differ\n",
+			 dattr->attr.name, val, *field);
+		*field = val;
+	}
+
+	count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
+
+out:
+	mutex_unlock(&tsdata->mutex);
+	return error ?: count;
+}
+
+static ssize_t hycon_hy46xx_setting_store(struct device *dev,
+					struct device_attribute *dattr,
+					const char *buf, size_t count)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client);
+	struct hycon_hy46xx_attribute *attr =
+			container_of(dattr, struct hycon_hy46xx_attribute, dattr);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
+	unsigned int val;
+	int error;
+
+	mutex_lock(&tsdata->mutex);
+
+	error = kstrtouint(buf, 0, &val);
+	if (error)
+		goto out;
+
+	if (val < attr->limit_low || val > attr->limit_high) {
+		error = -ERANGE;
+		goto out;
+	}
+
+	error = regmap_write(tsdata->regmap, attr->address, val);
+	if (error < 0) {
+		dev_err(&tsdata->client->dev,
+			"Failed to update attribute %s, error: %d\n",
+			dattr->attr.name, error);
+		goto out;
+	}
+	*field = val;
+
+out:
+	mutex_unlock(&tsdata->mutex);
+	return error ?: count;
+}
+
+static HYCON_ATTR_U8(threshold, 0644, HY46XX_THRESHOLD, 0, 255);
+static HYCON_ATTR_BOOL(glove_enable, 0644, HY46XX_GLOVE_EN);
+static HYCON_ATTR_U8(report_speed, 0644, HY46XX_REPORT_SPEED, 0, 255);
+static HYCON_ATTR_BOOL(noise_filter_enable, 0644, HY46XX_PWR_NOISE_EN);
+static HYCON_ATTR_U8(filter_data, 0644, HY46XX_FILTER_DATA, 0, 5);
+static HYCON_ATTR_U8(gain, 0644, HY46XX_GAIN, 0, 5);
+static HYCON_ATTR_U8(edge_offset, 0644, HY46XX_EDGE_OFFSET, 0, 5);
+static HYCON_ATTR_U8(fw_version, 0444, HY46XX_FW_VERSION, 0, 255);
+static HYCON_ATTR_U8(lib_version, 0444, HY46XX_LIB_VERSION, 0, 255);
+static HYCON_ATTR_U8(tp_information, 0444, HY46XX_TP_INFO, 0, 255);
+static HYCON_ATTR_U8(tp_chip_id, 0444, HY46XX_TP_CHIP_ID, 0, 255);
+static HYCON_ATTR_U8(bootloader_version, 0444, HY46XX_BOOT_VER, 0, 255);
+
+static struct attribute *hycon_hy46xx_attrs[] = {
+	&hycon_hy46xx_attr_threshold.dattr.attr,
+	&hycon_hy46xx_attr_glove_enable.dattr.attr,
+	&hycon_hy46xx_attr_report_speed.dattr.attr,
+	&hycon_hy46xx_attr_noise_filter_enable.dattr.attr,
+	&hycon_hy46xx_attr_filter_data.dattr.attr,
+	&hycon_hy46xx_attr_gain.dattr.attr,
+	&hycon_hy46xx_attr_edge_offset.dattr.attr,
+	&hycon_hy46xx_attr_fw_version.dattr.attr,
+	&hycon_hy46xx_attr_lib_version.dattr.attr,
+	&hycon_hy46xx_attr_tp_information.dattr.attr,
+	&hycon_hy46xx_attr_tp_chip_id.dattr.attr,
+	&hycon_hy46xx_attr_bootloader_version.dattr.attr,
+	NULL
+};
+
+static const struct attribute_group hycon_hy46xx_attr_group = {
+	.attrs = hycon_hy46xx_attrs,
+};
+
+static void hycon_hy46xx_get_defaults(struct device *dev, struct hycon_hy46xx_data *tsdata)
+{
+	bool val_bool;
+	int error;
+	u32 val;
+
+	error = device_property_read_u32(dev, "hycon,threshold", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_THRESHOLD, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->threshold = val;
+	}
+
+	val_bool = device_property_read_bool(dev, "hycon,glove-enable");
+	error = regmap_write(tsdata->regmap, HY46XX_GLOVE_EN, val_bool);
+	if (error < 0)
+		goto out;
+	tsdata->glove_enable = val_bool;
+
+	error = device_property_read_u32(dev, "hycon,report-speed-hz", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_REPORT_SPEED, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->report_speed = val;
+	}
+
+	val_bool = device_property_read_bool(dev, "hycon,noise-filter-enable");
+	error = regmap_write(tsdata->regmap, HY46XX_PWR_NOISE_EN, val_bool);
+	if (error < 0)
+		goto out;
+	tsdata->noise_filter_enable = val_bool;
+
+	error = device_property_read_u32(dev, "hycon,filter-data", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_FILTER_DATA, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->filter_data = val;
+	}
+
+	error = device_property_read_u32(dev, "hycon,gain", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_GAIN, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->gain = val;
+	}
+
+	error = device_property_read_u32(dev, "hycon,edge-offset", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_EDGE_OFFSET, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->edge_offset = val;
+	}
+
+	return;
+out:
+	dev_err(&tsdata->client->dev, "Failed to set default settings");
+}
+
+static void hycon_hy46xx_get_parameters(struct hycon_hy46xx_data *tsdata)
+{
+	int error;
+	u32 val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_THRESHOLD, &val);
+	if (error < 0)
+		goto out;
+	tsdata->threshold = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_GLOVE_EN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->glove_enable = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_REPORT_SPEED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->report_speed = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_PWR_NOISE_EN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->noise_filter_enable = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_FILTER_DATA, &val);
+	if (error < 0)
+		goto out;
+	tsdata->filter_data = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_GAIN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->gain = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_EDGE_OFFSET, &val);
+	if (error < 0)
+		goto out;
+	tsdata->edge_offset = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_RX_NR_USED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->rx_number_used = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TX_NR_USED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tx_number_used = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_PWR_MODE, &val);
+	if (error < 0)
+		goto out;
+	tsdata->power_mode = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_FW_VERSION, &val);
+	if (error < 0)
+		goto out;
+	tsdata->fw_version = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_LIB_VERSION, &val);
+	if (error < 0)
+		goto out;
+	tsdata->lib_version = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TP_INFO, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tp_information = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TP_CHIP_ID, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tp_chip_id = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_BOOT_VER, &val);
+	if (error < 0)
+		goto out;
+	tsdata->bootloader_version = val;
+
+	return;
+out:
+	dev_err(&tsdata->client->dev, "Failed to read default settings");
+}
+
+static void hycon_hy46xx_disable_regulator(void *arg)
+{
+	struct hycon_hy46xx_data *data = arg;
+
+	regulator_disable(data->vcc);
+}
+
+static int hycon_hy46xx_probe(struct i2c_client *client)
+{
+	struct hycon_hy46xx_data *tsdata;
+	struct input_dev *input;
+	int error;
+
+	dev_dbg(&client->dev, "probing for HYCON HY46XX I2C\n");
+
+	tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
+	if (!tsdata)
+		return -ENOMEM;
+
+	tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
+	if (IS_ERR(tsdata->vcc)) {
+		error = PTR_ERR(tsdata->vcc);
+		if (error != -EPROBE_DEFER)
+			dev_err(&client->dev,
+				"failed to request regulator: %d\n", error);
+		return error;
+	}
+
+	error = regulator_enable(tsdata->vcc);
+	if (error < 0) {
+		dev_err(&client->dev, "failed to enable vcc: %d\n", error);
+		return error;
+	}
+
+	error = devm_add_action_or_reset(&client->dev,
+					 hycon_hy46xx_disable_regulator,
+					 tsdata);
+	if (error)
+		return error;
+
+	tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
+						     "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(tsdata->reset_gpio)) {
+		error = PTR_ERR(tsdata->reset_gpio);
+		dev_err(&client->dev,
+			"Failed to request GPIO reset pin, error %d\n", error);
+		return error;
+	}
+
+	if (tsdata->reset_gpio) {
+		usleep_range(5000, 6000);
+		gpiod_set_value_cansleep(tsdata->reset_gpio, 1);
+		usleep_range(5000, 6000);
+		gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
+		msleep(1000);
+	}
+
+	input = devm_input_allocate_device(&client->dev);
+	if (!input) {
+		dev_err(&client->dev, "failed to allocate input device.\n");
+		return -ENOMEM;
+	}
+
+	mutex_init(&tsdata->mutex);
+	tsdata->client = client;
+	tsdata->input = input;
+
+	tsdata->regmap = devm_regmap_init_i2c(client,
+					      &hycon_hy46xx_i2c_regmap_config);
+	if (IS_ERR(tsdata->regmap)) {
+		dev_err(&client->dev, "regmap allocation failed\n");
+		return PTR_ERR(tsdata->regmap);
+	}
+
+	hycon_hy46xx_get_defaults(&client->dev, tsdata);
+	hycon_hy46xx_get_parameters(tsdata);
+
+	input->name = "Hycon Capacitive Touch";
+	input->id.bustype = BUS_I2C;
+	input->dev.parent = &client->dev;
+
+	input_set_abs_params(input, ABS_MT_POSITION_X, 0, -1, 0, 0);
+	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, -1, 0, 0);
+
+	touchscreen_parse_properties(input, true, &tsdata->prop);
+
+	error = input_mt_init_slots(input, HY46XX_MAX_SUPPORTED_POINTS,
+				    INPUT_MT_DIRECT);
+	if (error) {
+		dev_err(&client->dev, "Unable to init MT slots.\n");
+		return error;
+	}
+
+	i2c_set_clientdata(client, tsdata);
+
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, hycon_hy46xx_isr, IRQF_ONESHOT,
+					  client->name, tsdata);
+	if (error) {
+		dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
+		return error;
+	}
+
+	error = devm_device_add_group(&client->dev, &hycon_hy46xx_attr_group);
+	if (error)
+		return error;
+
+	error = input_register_device(input);
+	if (error)
+		return error;
+
+	dev_dbg(&client->dev,
+		"HYCON HY46XX initialized: IRQ %d, Reset pin %d.\n",
+		client->irq,
+		tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
+
+	return 0;
+}
+
+static const struct i2c_device_id hycon_hy46xx_id[] = {
+	{ .name = "hy4613" },
+	{ .name = "hy4614" },
+	{ .name = "hy4621" },
+	{ .name = "hy4623" },
+	{ .name = "hy4633" },
+	{ .name = "hy4635" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, hycon_hy46xx_id);
+
+static const struct of_device_id hycon_hy46xx_of_match[] = {
+	{ .compatible = "hycon,hy4613" },
+	{ .compatible = "hycon,hy4614" },
+	{ .compatible = "hycon,hy4621" },
+	{ .compatible = "hycon,hy4623" },
+	{ .compatible = "hycon,hy4633" },
+	{ .compatible = "hycon,hy4635" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hycon_hy46xx_of_match);
+
+static struct i2c_driver hycon_hy46xx_driver = {
+	.driver = {
+		.name = "hycon_hy46xx",
+		.of_match_table = hycon_hy46xx_of_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+	.id_table = hycon_hy46xx_id,
+	.probe_new = hycon_hy46xx_probe,
+};
+
+module_i2c_driver(hycon_hy46xx_driver);
+
+MODULE_AUTHOR("Giulio Benetti <giulio.benetti@benettiengineering.com>");
+MODULE_DESCRIPTION("HYCON HY46XX I2C Touchscreen Driver");
+MODULE_LICENSE("GPL v2");