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, 628 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c
new file mode 100644
index 000000000..7959947a3
--- /dev/null
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -0,0 +1,628 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for Pixcir I2C touchscreen controllers.
+ *
+ * Copyright (C) 2010-2011 Pixcir, Inc.
+ */
+
+#include <asm/unaligned.h>
+#include <linux/delay.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/interrupt.h>
+#include <linux/of_device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#define PIXCIR_MAX_SLOTS       5 /* Max fingers supported by driver */
+
+/*
+ * Register map
+ */
+#define PIXCIR_REG_POWER_MODE	51
+#define PIXCIR_REG_INT_MODE	52
+
+/*
+ * Power modes:
+ * active: max scan speed
+ * idle: lower scan speed with automatic transition to active on touch
+ * halt: datasheet says sleep but this is more like halt as the chip
+ *       clocks are cut and it can only be brought out of this mode
+ *	 using the RESET pin.
+ */
+enum pixcir_power_mode {
+	PIXCIR_POWER_ACTIVE,
+	PIXCIR_POWER_IDLE,
+	PIXCIR_POWER_HALT,
+};
+
+#define PIXCIR_POWER_MODE_MASK	0x03
+#define PIXCIR_POWER_ALLOW_IDLE (1UL << 2)
+
+/*
+ * Interrupt modes:
+ * periodical: interrupt is asserted periodicaly
+ * diff coordinates: interrupt is asserted when coordinates change
+ * level on touch: interrupt level asserted during touch
+ * pulse on touch: interrupt pulse asserted during touch
+ *
+ */
+enum pixcir_int_mode {
+	PIXCIR_INT_PERIODICAL,
+	PIXCIR_INT_DIFF_COORD,
+	PIXCIR_INT_LEVEL_TOUCH,
+	PIXCIR_INT_PULSE_TOUCH,
+};
+
+#define PIXCIR_INT_MODE_MASK	0x03
+#define PIXCIR_INT_ENABLE	(1UL << 3)
+#define PIXCIR_INT_POL_HIGH	(1UL << 2)
+
+/**
+ * struct pixcir_i2c_chip_data - chip related data
+ * @max_fingers:	Max number of fingers reported simultaneously by h/w
+ * @has_hw_ids:		Hardware supports finger tracking IDs
+ *
+ */
+struct pixcir_i2c_chip_data {
+	u8 max_fingers;
+	bool has_hw_ids;
+};
+
+struct pixcir_i2c_ts_data {
+	struct i2c_client *client;
+	struct input_dev *input;
+	struct gpio_desc *gpio_attb;
+	struct gpio_desc *gpio_reset;
+	struct gpio_desc *gpio_enable;
+	struct gpio_desc *gpio_wake;
+	const struct pixcir_i2c_chip_data *chip;
+	struct touchscreen_properties prop;
+	bool running;
+};
+
+struct pixcir_report_data {
+	int num_touches;
+	struct input_mt_pos pos[PIXCIR_MAX_SLOTS];
+	int ids[PIXCIR_MAX_SLOTS];
+};
+
+static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata,
+			    struct pixcir_report_data *report)
+{
+	u8 rdbuf[2 + PIXCIR_MAX_SLOTS * 5];
+	u8 wrbuf[1] = { 0 };
+	u8 *bufptr;
+	u8 touch;
+	int ret, i;
+	int readsize;
+	const struct pixcir_i2c_chip_data *chip = tsdata->chip;
+
+	memset(report, 0, sizeof(struct pixcir_report_data));
+
+	i = chip->has_hw_ids ? 1 : 0;
+	readsize = 2 + tsdata->chip->max_fingers * (4 + i);
+	if (readsize > sizeof(rdbuf))
+		readsize = sizeof(rdbuf);
+
+	ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));
+	if (ret != sizeof(wrbuf)) {
+		dev_err(&tsdata->client->dev,
+			"%s: i2c_master_send failed(), ret=%d\n",
+			__func__, ret);
+		return;
+	}
+
+	ret = i2c_master_recv(tsdata->client, rdbuf, readsize);
+	if (ret != readsize) {
+		dev_err(&tsdata->client->dev,
+			"%s: i2c_master_recv failed(), ret=%d\n",
+			__func__, ret);
+		return;
+	}
+
+	touch = rdbuf[0] & 0x7;
+	if (touch > tsdata->chip->max_fingers)
+		touch = tsdata->chip->max_fingers;
+
+	report->num_touches = touch;
+	bufptr = &rdbuf[2];
+
+	for (i = 0; i < touch; i++) {
+		touchscreen_set_mt_pos(&report->pos[i], &tsdata->prop,
+				       get_unaligned_le16(bufptr),
+				       get_unaligned_le16(bufptr + 2));
+		if (chip->has_hw_ids) {
+			report->ids[i] = bufptr[4];
+			bufptr = bufptr + 5;
+		} else {
+			bufptr = bufptr + 4;
+		}
+	}
+}
+
+static void pixcir_ts_report(struct pixcir_i2c_ts_data *ts,
+			     struct pixcir_report_data *report)
+{
+	int slots[PIXCIR_MAX_SLOTS];
+	int n, i, slot;
+	struct device *dev = &ts->client->dev;
+	const struct pixcir_i2c_chip_data *chip = ts->chip;
+
+	n = report->num_touches;
+	if (n > PIXCIR_MAX_SLOTS)
+		n = PIXCIR_MAX_SLOTS;
+
+	if (!ts->chip->has_hw_ids)
+		input_mt_assign_slots(ts->input, slots, report->pos, n, 0);
+
+	for (i = 0; i < n; i++) {
+		if (chip->has_hw_ids) {
+			slot = input_mt_get_slot_by_key(ts->input,
+							report->ids[i]);
+			if (slot < 0) {
+				dev_dbg(dev, "no free slot for id 0x%x\n",
+					report->ids[i]);
+				continue;
+			}
+		} else {
+			slot = slots[i];
+		}
+
+		input_mt_slot(ts->input, slot);
+		input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
+
+		input_report_abs(ts->input, ABS_MT_POSITION_X,
+				 report->pos[i].x);
+		input_report_abs(ts->input, ABS_MT_POSITION_Y,
+				 report->pos[i].y);
+
+		dev_dbg(dev, "%d: slot %d, x %d, y %d\n",
+			i, slot, report->pos[i].x, report->pos[i].y);
+	}
+
+	input_mt_sync_frame(ts->input);
+	input_sync(ts->input);
+}
+
+static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
+{
+	struct pixcir_i2c_ts_data *tsdata = dev_id;
+	struct pixcir_report_data report;
+
+	while (tsdata->running) {
+		/* parse packet */
+		pixcir_ts_parse(tsdata, &report);
+
+		/* report it */
+		pixcir_ts_report(tsdata, &report);
+
+		if (gpiod_get_value_cansleep(tsdata->gpio_attb)) {
+			if (report.num_touches) {
+				/*
+				 * Last report with no finger up?
+				 * Do it now then.
+				 */
+				input_mt_sync_frame(tsdata->input);
+				input_sync(tsdata->input);
+			}
+			break;
+		}
+
+		msleep(20);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void pixcir_reset(struct pixcir_i2c_ts_data *tsdata)
+{
+	if (!IS_ERR_OR_NULL(tsdata->gpio_reset)) {
+		gpiod_set_value_cansleep(tsdata->gpio_reset, 1);
+		ndelay(100);	/* datasheet section 1.2.3 says 80ns min. */
+		gpiod_set_value_cansleep(tsdata->gpio_reset, 0);
+		/* wait for controller ready. 100ms guess. */
+		msleep(100);
+	}
+}
+
+static int pixcir_set_power_mode(struct pixcir_i2c_ts_data *ts,
+				 enum pixcir_power_mode mode)
+{
+	struct device *dev = &ts->client->dev;
+	int ret;
+
+	if (mode == PIXCIR_POWER_ACTIVE || mode == PIXCIR_POWER_IDLE) {
+		if (ts->gpio_wake)
+			gpiod_set_value_cansleep(ts->gpio_wake, 1);
+	}
+
+	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't read reg %d : %d\n",
+			__func__, PIXCIR_REG_POWER_MODE, ret);
+		return ret;
+	}
+
+	ret &= ~PIXCIR_POWER_MODE_MASK;
+	ret |= mode;
+
+	/* Always AUTO_IDLE */
+	ret |= PIXCIR_POWER_ALLOW_IDLE;
+
+	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't write reg %d : %d\n",
+			__func__, PIXCIR_REG_POWER_MODE, ret);
+		return ret;
+	}
+
+	if (mode == PIXCIR_POWER_HALT) {
+		if (ts->gpio_wake)
+			gpiod_set_value_cansleep(ts->gpio_wake, 0);
+	}
+
+	return 0;
+}
+
+/*
+ * Set the interrupt mode for the device i.e. ATTB line behaviour
+ *
+ * @polarity : 1 for active high, 0 for active low.
+ */
+static int pixcir_set_int_mode(struct pixcir_i2c_ts_data *ts,
+			       enum pixcir_int_mode mode, bool polarity)
+{
+	struct device *dev = &ts->client->dev;
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't read reg %d : %d\n",
+			__func__, PIXCIR_REG_INT_MODE, ret);
+		return ret;
+	}
+
+	ret &= ~PIXCIR_INT_MODE_MASK;
+	ret |= mode;
+
+	if (polarity)
+		ret |= PIXCIR_INT_POL_HIGH;
+	else
+		ret &= ~PIXCIR_INT_POL_HIGH;
+
+	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't write reg %d : %d\n",
+			__func__, PIXCIR_REG_INT_MODE, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+/*
+ * Enable/disable interrupt generation
+ */
+static int pixcir_int_enable(struct pixcir_i2c_ts_data *ts, bool enable)
+{
+	struct device *dev = &ts->client->dev;
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't read reg %d : %d\n",
+			__func__, PIXCIR_REG_INT_MODE, ret);
+		return ret;
+	}
+
+	if (enable)
+		ret |= PIXCIR_INT_ENABLE;
+	else
+		ret &= ~PIXCIR_INT_ENABLE;
+
+	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);
+	if (ret < 0) {
+		dev_err(dev, "%s: can't write reg %d : %d\n",
+			__func__, PIXCIR_REG_INT_MODE, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int pixcir_start(struct pixcir_i2c_ts_data *ts)
+{
+	struct device *dev = &ts->client->dev;
+	int error;
+
+	if (ts->gpio_enable) {
+		gpiod_set_value_cansleep(ts->gpio_enable, 1);
+		msleep(100);
+	}
+
+	/* LEVEL_TOUCH interrupt with active low polarity */
+	error = pixcir_set_int_mode(ts, PIXCIR_INT_LEVEL_TOUCH, 0);
+	if (error) {
+		dev_err(dev, "Failed to set interrupt mode: %d\n", error);
+		return error;
+	}
+
+	ts->running = true;
+	mb();	/* Update status before IRQ can fire */
+
+	/* enable interrupt generation */
+	error = pixcir_int_enable(ts, true);
+	if (error) {
+		dev_err(dev, "Failed to enable interrupt generation: %d\n",
+			error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int pixcir_stop(struct pixcir_i2c_ts_data *ts)
+{
+	int error;
+
+	/* Disable interrupt generation */
+	error = pixcir_int_enable(ts, false);
+	if (error) {
+		dev_err(&ts->client->dev,
+			"Failed to disable interrupt generation: %d\n",
+			error);
+		return error;
+	}
+
+	/* Exit ISR if running, no more report parsing */
+	ts->running = false;
+	mb();	/* update status before we synchronize irq */
+
+	/* Wait till running ISR is complete */
+	synchronize_irq(ts->client->irq);
+
+	if (ts->gpio_enable)
+		gpiod_set_value_cansleep(ts->gpio_enable, 0);
+
+	return 0;
+}
+
+static int pixcir_input_open(struct input_dev *dev)
+{
+	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
+
+	return pixcir_start(ts);
+}
+
+static void pixcir_input_close(struct input_dev *dev)
+{
+	struct pixcir_i2c_ts_data *ts = input_get_drvdata(dev);
+
+	pixcir_stop(ts);
+}
+
+static int __maybe_unused pixcir_i2c_ts_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
+	struct input_dev *input = ts->input;
+	int ret = 0;
+
+	mutex_lock(&input->mutex);
+
+	if (device_may_wakeup(&client->dev)) {
+		if (!input_device_enabled(input)) {
+			ret = pixcir_start(ts);
+			if (ret) {
+				dev_err(dev, "Failed to start\n");
+				goto unlock;
+			}
+		}
+	} else if (input_device_enabled(input)) {
+		ret = pixcir_stop(ts);
+	}
+
+unlock:
+	mutex_unlock(&input->mutex);
+
+	return ret;
+}
+
+static int __maybe_unused pixcir_i2c_ts_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
+	struct input_dev *input = ts->input;
+	int ret = 0;
+
+	mutex_lock(&input->mutex);
+
+	if (device_may_wakeup(&client->dev)) {
+		if (!input_device_enabled(input)) {
+			ret = pixcir_stop(ts);
+			if (ret) {
+				dev_err(dev, "Failed to stop\n");
+				goto unlock;
+			}
+		}
+	} else if (input_device_enabled(input)) {
+		ret = pixcir_start(ts);
+	}
+
+unlock:
+	mutex_unlock(&input->mutex);
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
+			 pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
+
+static int pixcir_i2c_ts_probe(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	struct device *dev = &client->dev;
+	struct pixcir_i2c_ts_data *tsdata;
+	struct input_dev *input;
+	int error;
+
+	tsdata = devm_kzalloc(dev, sizeof(*tsdata), GFP_KERNEL);
+	if (!tsdata)
+		return -ENOMEM;
+
+	tsdata->chip = device_get_match_data(dev);
+	if (!tsdata->chip && id)
+		tsdata->chip = (const void *)id->driver_data;
+	if (!tsdata->chip) {
+		dev_err(dev, "can't locate chip data\n");
+		return -EINVAL;
+	}
+
+	input = devm_input_allocate_device(dev);
+	if (!input) {
+		dev_err(dev, "Failed to allocate input device\n");
+		return -ENOMEM;
+	}
+
+	tsdata->client = client;
+	tsdata->input = input;
+
+	input->name = client->name;
+	input->id.bustype = BUS_I2C;
+	input->open = pixcir_input_open;
+	input->close = pixcir_input_close;
+
+	input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
+	touchscreen_parse_properties(input, true, &tsdata->prop);
+	if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
+	    !input_abs_get_max(input, ABS_MT_POSITION_Y)) {
+		dev_err(dev, "Touchscreen size is not specified\n");
+		return -EINVAL;
+	}
+
+	error = input_mt_init_slots(input, tsdata->chip->max_fingers,
+				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+	if (error) {
+		dev_err(dev, "Error initializing Multi-Touch slots\n");
+		return error;
+	}
+
+	input_set_drvdata(input, tsdata);
+
+	tsdata->gpio_attb = devm_gpiod_get(dev, "attb", GPIOD_IN);
+	if (IS_ERR(tsdata->gpio_attb)) {
+		error = PTR_ERR(tsdata->gpio_attb);
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "Failed to request ATTB gpio: %d\n",
+				error);
+		return error;
+	}
+
+	tsdata->gpio_reset = devm_gpiod_get_optional(dev, "reset",
+						     GPIOD_OUT_LOW);
+	if (IS_ERR(tsdata->gpio_reset)) {
+		error = PTR_ERR(tsdata->gpio_reset);
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "Failed to request RESET gpio: %d\n",
+				error);
+		return error;
+	}
+
+	tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake",
+						    GPIOD_OUT_HIGH);
+	if (IS_ERR(tsdata->gpio_wake)) {
+		error = PTR_ERR(tsdata->gpio_wake);
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "Failed to get wake gpio: %d\n", error);
+		return error;
+	}
+
+	tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable",
+						      GPIOD_OUT_HIGH);
+	if (IS_ERR(tsdata->gpio_enable)) {
+		error = PTR_ERR(tsdata->gpio_enable);
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "Failed to get enable gpio: %d\n", error);
+		return error;
+	}
+
+	if (tsdata->gpio_enable)
+		msleep(100);
+
+	error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr,
+					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					  client->name, tsdata);
+	if (error) {
+		dev_err(dev, "failed to request irq %d\n", client->irq);
+		return error;
+	}
+
+	pixcir_reset(tsdata);
+
+	/* Always be in IDLE mode to save power, device supports auto wake */
+	error = pixcir_set_power_mode(tsdata, PIXCIR_POWER_IDLE);
+	if (error) {
+		dev_err(dev, "Failed to set IDLE mode\n");
+		return error;
+	}
+
+	/* Stop device till opened */
+	error = pixcir_stop(tsdata);
+	if (error)
+		return error;
+
+	error = input_register_device(input);
+	if (error)
+		return error;
+
+	i2c_set_clientdata(client, tsdata);
+
+	return 0;
+}
+
+static const struct pixcir_i2c_chip_data pixcir_ts_data = {
+	.max_fingers = 2,
+	/* no hw id support */
+};
+
+static const struct pixcir_i2c_chip_data pixcir_tangoc_data = {
+	.max_fingers = 5,
+	.has_hw_ids = true,
+};
+
+static const struct i2c_device_id pixcir_i2c_ts_id[] = {
+	{ "pixcir_ts", (unsigned long) &pixcir_ts_data },
+	{ "pixcir_tangoc", (unsigned long) &pixcir_tangoc_data },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id pixcir_of_match[] = {
+	{ .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data },
+	{ .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pixcir_of_match);
+#endif
+
+static struct i2c_driver pixcir_i2c_ts_driver = {
+	.driver = {
+		.name	= "pixcir_ts",
+		.pm	= &pixcir_dev_pm_ops,
+		.of_match_table = of_match_ptr(pixcir_of_match),
+	},
+	.probe_new	= pixcir_i2c_ts_probe,
+	.id_table	= pixcir_i2c_ts_id,
+};
+
+module_i2c_driver(pixcir_i2c_ts_driver);
+
+MODULE_AUTHOR("Jianchun Bian <jcbian@pixcir.com.cn>, Dequan Meng <dqmeng@pixcir.com.cn>");
+MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver");
+MODULE_LICENSE("GPL");