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, 498 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/hynitron_cstxxx.c b/drivers/input/touchscreen/hynitron_cstxxx.c
new file mode 100644
index 000000000..e86c85add
--- /dev/null
+++ b/drivers/input/touchscreen/hynitron_cstxxx.c
@@ -0,0 +1,498 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Driver for Hynitron cstxxx Touchscreen
+ *
+ *  Copyright (c) 2022 Chris Morgan <macromorgan@hotmail.com>
+ *
+ *  This code is based on hynitron_core.c authored by Hynitron.
+ *  Note that no datasheet was available, so much of these registers
+ *  are undocumented. This is essentially a cleaned-up version of the
+ *  vendor driver with support removed for hardware I cannot test and
+ *  device-specific functions replated with generic functions wherever
+ *  possible.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <asm/unaligned.h>
+
+/* Per chip data */
+struct hynitron_ts_chip_data {
+	unsigned int max_touch_num;
+	u32 ic_chkcode;
+	int (*firmware_info)(struct i2c_client *client);
+	int (*bootloader_enter)(struct i2c_client *client);
+	int (*init_input)(struct i2c_client *client);
+	void (*report_touch)(struct i2c_client *client);
+};
+
+/* Data generic to all (supported and non-supported) controllers. */
+struct hynitron_ts_data {
+	const struct hynitron_ts_chip_data *chip;
+	struct i2c_client *client;
+	struct input_dev *input_dev;
+	struct touchscreen_properties prop;
+	struct gpio_desc *reset_gpio;
+};
+
+/*
+ * Since I have no datasheet, these values are guessed and/or assumed
+ * based on observation and testing.
+ */
+#define CST3XX_FIRMWARE_INFO_START_CMD		0x01d1
+#define CST3XX_FIRMWARE_INFO_END_CMD		0x09d1
+#define CST3XX_FIRMWARE_CHK_CODE_REG		0xfcd1
+#define CST3XX_FIRMWARE_VERSION_REG		0x08d2
+#define CST3XX_FIRMWARE_VER_INVALID_VAL		0xa5a5a5a5
+
+#define CST3XX_BOOTLDR_PROG_CMD			0xaa01a0
+#define CST3XX_BOOTLDR_PROG_CHK_REG		0x02a0
+#define CST3XX_BOOTLDR_CHK_VAL			0xac
+
+#define CST3XX_TOUCH_DATA_PART_REG		0x00d0
+#define CST3XX_TOUCH_DATA_FULL_REG		0x07d0
+#define CST3XX_TOUCH_DATA_CHK_VAL		0xab
+#define CST3XX_TOUCH_DATA_TOUCH_VAL		0x03
+#define CST3XX_TOUCH_DATA_STOP_CMD		0xab00d0
+#define CST3XX_TOUCH_COUNT_MASK			GENMASK(6, 0)
+
+
+/*
+ * Hard coded reset delay value of 20ms not IC dependent in
+ * vendor driver.
+ */
+static void hyn_reset_proc(struct i2c_client *client, int delay)
+{
+	struct hynitron_ts_data *ts_data = i2c_get_clientdata(client);
+
+	gpiod_set_value_cansleep(ts_data->reset_gpio, 1);
+	msleep(20);
+	gpiod_set_value_cansleep(ts_data->reset_gpio, 0);
+	if (delay)
+		fsleep(delay * 1000);
+}
+
+static irqreturn_t hyn_interrupt_handler(int irq, void *dev_id)
+{
+	struct i2c_client *client = dev_id;
+	struct hynitron_ts_data *ts_data = i2c_get_clientdata(client);
+
+	ts_data->chip->report_touch(client);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * The vendor driver would retry twice before failing to read or write
+ * to the i2c device.
+ */
+
+static int cst3xx_i2c_write(struct i2c_client *client,
+			    unsigned char *buf, int len)
+{
+	int ret;
+	int retries = 0;
+
+	while (retries < 2) {
+		ret = i2c_master_send(client, buf, len);
+		if (ret == len)
+			return 0;
+		if (ret <= 0)
+			retries++;
+		else
+			break;
+	}
+
+	return ret < 0 ? ret : -EIO;
+}
+
+static int cst3xx_i2c_read_register(struct i2c_client *client, u16 reg,
+				    u8 *val, u16 len)
+{
+	__le16 buf = cpu_to_le16(reg);
+	struct i2c_msg msgs[] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = 2,
+			.buf = (u8 *)&buf,
+		},
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = len,
+			.buf = val,
+		}
+	};
+	int err;
+	int ret;
+
+	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (ret == ARRAY_SIZE(msgs))
+		return 0;
+
+	err = ret < 0 ? ret : -EIO;
+	dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d (%d)\n",
+		len, reg, err, ret);
+
+	return err;
+}
+
+static int cst3xx_firmware_info(struct i2c_client *client)
+{
+	struct hynitron_ts_data *ts_data = i2c_get_clientdata(client);
+	int err;
+	u32 tmp;
+	unsigned char buf[4];
+
+	/*
+	 * Tests suggest this command needed to read firmware regs.
+	 */
+	put_unaligned_le16(CST3XX_FIRMWARE_INFO_START_CMD, buf);
+	err = cst3xx_i2c_write(client, buf, 2);
+	if (err)
+		return err;
+
+	usleep_range(10000, 11000);
+
+	/*
+	 * Read register for check-code to determine if device detected
+	 * correctly.
+	 */
+	err = cst3xx_i2c_read_register(client, CST3XX_FIRMWARE_CHK_CODE_REG,
+				       buf, 4);
+	if (err)
+		return err;
+
+	tmp = get_unaligned_le32(buf);
+	if ((tmp & 0xffff0000) != ts_data->chip->ic_chkcode) {
+		dev_err(&client->dev, "%s ic mismatch, chkcode is %u\n",
+			__func__, tmp);
+		return -ENODEV;
+	}
+
+	usleep_range(10000, 11000);
+
+	/* Read firmware version and test if firmware missing. */
+	err = cst3xx_i2c_read_register(client, CST3XX_FIRMWARE_VERSION_REG,
+				       buf, 4);
+	if (err)
+		return err;
+
+	tmp = get_unaligned_le32(buf);
+	if (tmp == CST3XX_FIRMWARE_VER_INVALID_VAL) {
+		dev_err(&client->dev, "Device firmware missing\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Tests suggest cmd required to exit reading firmware regs.
+	 */
+	put_unaligned_le16(CST3XX_FIRMWARE_INFO_END_CMD, buf);
+	err = cst3xx_i2c_write(client, buf, 2);
+	if (err)
+		return err;
+
+	usleep_range(5000, 6000);
+
+	return 0;
+}
+
+static int cst3xx_bootloader_enter(struct i2c_client *client)
+{
+	int err;
+	u8 retry;
+	u32 tmp = 0;
+	unsigned char buf[3];
+
+	for (retry = 0; retry < 5; retry++) {
+		hyn_reset_proc(client, (7 + retry));
+		/* set cmd to enter program mode */
+		put_unaligned_le24(CST3XX_BOOTLDR_PROG_CMD, buf);
+		err = cst3xx_i2c_write(client, buf, 3);
+		if (err)
+			continue;
+
+		usleep_range(2000, 2500);
+
+		/* check whether in program mode */
+		err = cst3xx_i2c_read_register(client,
+					       CST3XX_BOOTLDR_PROG_CHK_REG,
+					       buf, 1);
+		if (err)
+			continue;
+
+		tmp = get_unaligned(buf);
+		if (tmp == CST3XX_BOOTLDR_CHK_VAL)
+			break;
+	}
+
+	if (tmp != CST3XX_BOOTLDR_CHK_VAL) {
+		dev_err(&client->dev, "%s unable to enter bootloader mode\n",
+			__func__);
+		return -ENODEV;
+	}
+
+	hyn_reset_proc(client, 40);
+
+	return 0;
+}
+
+static void cst3xx_report_contact(struct hynitron_ts_data *ts_data,
+				  u8 id, unsigned int x, unsigned int y, u8 w)
+{
+	input_mt_slot(ts_data->input_dev, id);
+	input_mt_report_slot_state(ts_data->input_dev, MT_TOOL_FINGER, 1);
+	touchscreen_report_pos(ts_data->input_dev, &ts_data->prop, x, y, true);
+	input_report_abs(ts_data->input_dev, ABS_MT_TOUCH_MAJOR, w);
+}
+
+static int cst3xx_finish_touch_read(struct i2c_client *client)
+{
+	unsigned char buf[3];
+	int err;
+
+	put_unaligned_le24(CST3XX_TOUCH_DATA_STOP_CMD, buf);
+	err = cst3xx_i2c_write(client, buf, 3);
+	if (err) {
+		dev_err(&client->dev,
+			"send read touch info ending failed: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+/*
+ * Handle events from IRQ. Note that for cst3xx it appears that IRQ
+ * fires continuously while touched, otherwise once every 1500ms
+ * when not touched (assume touchscreen waking up periodically).
+ * Note buffer is sized for 5 fingers, if more needed buffer must
+ * be increased. The buffer contains 5 bytes for each touch point,
+ * a touch count byte, a check byte, and then a second check byte after
+ * all other touch points.
+ *
+ * For example 1 touch would look like this:
+ * touch1[5]:touch_count[1]:chk_byte[1]
+ *
+ * 3 touches would look like this:
+ * touch1[5]:touch_count[1]:chk_byte[1]:touch2[5]:touch3[5]:chk_byte[1]
+ */
+static void cst3xx_touch_report(struct i2c_client *client)
+{
+	struct hynitron_ts_data *ts_data = i2c_get_clientdata(client);
+	u8 buf[28];
+	u8 finger_id, sw, w;
+	unsigned int x, y;
+	unsigned int touch_cnt, end_byte;
+	unsigned int idx = 0;
+	unsigned int i;
+	int err;
+
+	/* Read and validate the first bits of input data. */
+	err = cst3xx_i2c_read_register(client, CST3XX_TOUCH_DATA_PART_REG,
+				       buf, 28);
+	if (err ||
+	    buf[6] != CST3XX_TOUCH_DATA_CHK_VAL ||
+	    buf[0] == CST3XX_TOUCH_DATA_CHK_VAL) {
+		dev_err(&client->dev, "cst3xx touch read failure\n");
+		return;
+	}
+
+	/* Report to the device we're done reading the touch data. */
+	err = cst3xx_finish_touch_read(client);
+	if (err)
+		return;
+
+	touch_cnt = buf[5] & CST3XX_TOUCH_COUNT_MASK;
+	/*
+	 * Check the check bit of the last touch slot. The check bit is
+	 * always present after touch point 1 for valid data, and then
+	 * appears as the last byte after all other touch data.
+	 */
+	if (touch_cnt > 1) {
+		end_byte = touch_cnt * 5 + 2;
+		if (buf[end_byte] != CST3XX_TOUCH_DATA_CHK_VAL) {
+			dev_err(&client->dev, "cst3xx touch read failure\n");
+			return;
+		}
+	}
+
+	/* Parse through the buffer to capture touch data. */
+	for (i = 0; i < touch_cnt; i++) {
+		x = ((buf[idx + 1] << 4) | ((buf[idx + 3] >> 4) & 0x0f));
+		y = ((buf[idx + 2] << 4) | (buf[idx + 3] & 0x0f));
+		w = (buf[idx + 4] >> 3);
+		sw = (buf[idx] & 0x0f) >> 1;
+		finger_id = (buf[idx] >> 4) & 0x0f;
+
+		/* Sanity check we don't have more fingers than we expect */
+		if (ts_data->chip->max_touch_num < finger_id) {
+			dev_err(&client->dev, "cst3xx touch read failure\n");
+			break;
+		}
+
+		/* sw value of 0 means no touch, 0x03 means touch */
+		if (sw == CST3XX_TOUCH_DATA_TOUCH_VAL)
+			cst3xx_report_contact(ts_data, finger_id, x, y, w);
+
+		idx += 5;
+
+		/* Skip the 2 bytes between point 1 and point 2 */
+		if (i == 0)
+			idx += 2;
+	}
+
+	input_mt_sync_frame(ts_data->input_dev);
+	input_sync(ts_data->input_dev);
+}
+
+static int cst3xx_input_dev_int(struct i2c_client *client)
+{
+	struct hynitron_ts_data *ts_data = i2c_get_clientdata(client);
+	int err;
+
+	ts_data->input_dev = devm_input_allocate_device(&client->dev);
+	if (!ts_data->input_dev) {
+		dev_err(&client->dev, "Failed to allocate input device\n");
+		return -ENOMEM;
+	}
+
+	ts_data->input_dev->name = "Hynitron cst3xx Touchscreen";
+	ts_data->input_dev->phys = "input/ts";
+	ts_data->input_dev->id.bustype = BUS_I2C;
+
+	input_set_drvdata(ts_data->input_dev, ts_data);
+
+	input_set_capability(ts_data->input_dev, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(ts_data->input_dev, EV_ABS, ABS_MT_POSITION_Y);
+	input_set_abs_params(ts_data->input_dev, ABS_MT_TOUCH_MAJOR,
+			     0, 255, 0, 0);
+
+	touchscreen_parse_properties(ts_data->input_dev, true, &ts_data->prop);
+
+	if (!ts_data->prop.max_x || !ts_data->prop.max_y) {
+		dev_err(&client->dev,
+			"Invalid x/y (%d, %d), using defaults\n",
+			ts_data->prop.max_x, ts_data->prop.max_y);
+		ts_data->prop.max_x = 1152;
+		ts_data->prop.max_y = 1920;
+		input_abs_set_max(ts_data->input_dev,
+				  ABS_MT_POSITION_X, ts_data->prop.max_x);
+		input_abs_set_max(ts_data->input_dev,
+				  ABS_MT_POSITION_Y, ts_data->prop.max_y);
+	}
+
+	err = input_mt_init_slots(ts_data->input_dev,
+				  ts_data->chip->max_touch_num,
+				  INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+	if (err) {
+		dev_err(&client->dev,
+			"Failed to initialize input slots: %d\n", err);
+		return err;
+	}
+
+	err = input_register_device(ts_data->input_dev);
+	if (err) {
+		dev_err(&client->dev,
+			"Input device registration failed: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int hyn_probe(struct i2c_client *client)
+{
+	struct hynitron_ts_data *ts_data;
+	int err;
+
+	ts_data = devm_kzalloc(&client->dev, sizeof(*ts_data), GFP_KERNEL);
+	if (!ts_data)
+		return -ENOMEM;
+
+	ts_data->client = client;
+	i2c_set_clientdata(client, ts_data);
+
+	ts_data->chip = device_get_match_data(&client->dev);
+	if (!ts_data->chip)
+		return -EINVAL;
+
+	ts_data->reset_gpio = devm_gpiod_get(&client->dev,
+					     "reset", GPIOD_OUT_LOW);
+	err = PTR_ERR_OR_ZERO(ts_data->reset_gpio);
+	if (err) {
+		dev_err(&client->dev, "request reset gpio failed: %d\n", err);
+		return err;
+	}
+
+	hyn_reset_proc(client, 60);
+
+	err = ts_data->chip->bootloader_enter(client);
+	if (err < 0)
+		return err;
+
+	err = ts_data->chip->init_input(client);
+	if (err < 0)
+		return err;
+
+	err = ts_data->chip->firmware_info(client);
+	if (err < 0)
+		return err;
+
+	err = devm_request_threaded_irq(&client->dev, client->irq,
+					NULL, hyn_interrupt_handler,
+					IRQF_ONESHOT,
+					"Hynitron Touch Int", client);
+	if (err) {
+		dev_err(&client->dev, "failed to request IRQ: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct hynitron_ts_chip_data cst3xx_data = {
+	.max_touch_num		= 5,
+	.ic_chkcode		= 0xcaca0000,
+	.firmware_info		= &cst3xx_firmware_info,
+	.bootloader_enter	= &cst3xx_bootloader_enter,
+	.init_input		= &cst3xx_input_dev_int,
+	.report_touch		= &cst3xx_touch_report,
+};
+
+static const struct i2c_device_id hyn_tpd_id[] = {
+	{ .name = "hynitron_ts", 0 },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i2c, hyn_tpd_id);
+
+static const struct of_device_id hyn_dt_match[] = {
+	{ .compatible = "hynitron,cst340", .data = &cst3xx_data },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, hyn_dt_match);
+
+static struct i2c_driver hynitron_i2c_driver = {
+	.driver = {
+		.name = "Hynitron-TS",
+		.of_match_table = hyn_dt_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+	.id_table = hyn_tpd_id,
+	.probe_new = hyn_probe,
+};
+
+module_i2c_driver(hynitron_i2c_driver);
+
+MODULE_AUTHOR("Chris Morgan");
+MODULE_DESCRIPTION("Hynitron Touchscreen Driver");
+MODULE_LICENSE("GPL");