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, 729 insertions, 0 deletions

diff --git a/drivers/input/rmi4/rmi_f01.c b/drivers/input/rmi4/rmi_f01.c
new file mode 100644
index 000000000..d7603c50f
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f01.c
@@ -0,0 +1,729 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2011-2016 Synaptics Incorporated
+ * Copyright (c) 2011 Unixphere
+ */
+
+#include <linux/kernel.h>
+#include <linux/rmi.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/of.h>
+#include <asm/unaligned.h>
+#include "rmi_driver.h"
+
+#define RMI_PRODUCT_ID_LENGTH    10
+#define RMI_PRODUCT_INFO_LENGTH   2
+
+#define RMI_DATE_CODE_LENGTH      3
+
+#define PRODUCT_ID_OFFSET 0x10
+#define PRODUCT_INFO_OFFSET 0x1E
+
+
+/* Force a firmware reset of the sensor */
+#define RMI_F01_CMD_DEVICE_RESET	1
+
+/* Various F01_RMI_QueryX bits */
+
+#define RMI_F01_QRY1_CUSTOM_MAP		BIT(0)
+#define RMI_F01_QRY1_NON_COMPLIANT	BIT(1)
+#define RMI_F01_QRY1_HAS_LTS		BIT(2)
+#define RMI_F01_QRY1_HAS_SENSOR_ID	BIT(3)
+#define RMI_F01_QRY1_HAS_CHARGER_INP	BIT(4)
+#define RMI_F01_QRY1_HAS_ADJ_DOZE	BIT(5)
+#define RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF	BIT(6)
+#define RMI_F01_QRY1_HAS_QUERY42	BIT(7)
+
+#define RMI_F01_QRY5_YEAR_MASK		0x1f
+#define RMI_F01_QRY6_MONTH_MASK		0x0f
+#define RMI_F01_QRY7_DAY_MASK		0x1f
+
+#define RMI_F01_QRY2_PRODINFO_MASK	0x7f
+
+#define RMI_F01_BASIC_QUERY_LEN		21 /* From Query 00 through 20 */
+
+struct f01_basic_properties {
+	u8 manufacturer_id;
+	bool has_lts;
+	bool has_adjustable_doze;
+	bool has_adjustable_doze_holdoff;
+	char dom[11]; /* YYYY/MM/DD + '\0' */
+	u8 product_id[RMI_PRODUCT_ID_LENGTH + 1];
+	u16 productinfo;
+	u32 firmware_id;
+	u32 package_id;
+};
+
+/* F01 device status bits */
+
+/* Most recent device status event */
+#define RMI_F01_STATUS_CODE(status)		((status) & 0x0f)
+/* The device has lost its configuration for some reason. */
+#define RMI_F01_STATUS_UNCONFIGURED(status)	(!!((status) & 0x80))
+/* The device is in bootloader mode */
+#define RMI_F01_STATUS_BOOTLOADER(status)	((status) & 0x40)
+
+/* Control register bits */
+
+/*
+ * Sleep mode controls power management on the device and affects all
+ * functions of the device.
+ */
+#define RMI_F01_CTRL0_SLEEP_MODE_MASK	0x03
+
+#define RMI_SLEEP_MODE_NORMAL		0x00
+#define RMI_SLEEP_MODE_SENSOR_SLEEP	0x01
+#define RMI_SLEEP_MODE_RESERVED0	0x02
+#define RMI_SLEEP_MODE_RESERVED1	0x03
+
+/*
+ * This bit disables whatever sleep mode may be selected by the sleep_mode
+ * field and forces the device to run at full power without sleeping.
+ */
+#define RMI_F01_CTRL0_NOSLEEP_BIT	BIT(2)
+
+/*
+ * When this bit is set, the touch controller employs a noise-filtering
+ * algorithm designed for use with a connected battery charger.
+ */
+#define RMI_F01_CTRL0_CHARGER_BIT	BIT(5)
+
+/*
+ * Sets the report rate for the device. The effect of this setting is
+ * highly product dependent. Check the spec sheet for your particular
+ * touch sensor.
+ */
+#define RMI_F01_CTRL0_REPORTRATE_BIT	BIT(6)
+
+/*
+ * Written by the host as an indicator that the device has been
+ * successfully configured.
+ */
+#define RMI_F01_CTRL0_CONFIGURED_BIT	BIT(7)
+
+/**
+ * struct f01_device_control - controls basic sensor functions
+ *
+ * @ctrl0: see the bit definitions above.
+ * @doze_interval: controls the interval between checks for finger presence
+ *	when the touch sensor is in doze mode, in units of 10ms.
+ * @wakeup_threshold: controls the capacitance threshold at which the touch
+ *	sensor will decide to wake up from that low power state.
+ * @doze_holdoff: controls how long the touch sensor waits after the last
+ *	finger lifts before entering the doze state, in units of 100ms.
+ */
+struct f01_device_control {
+	u8 ctrl0;
+	u8 doze_interval;
+	u8 wakeup_threshold;
+	u8 doze_holdoff;
+};
+
+struct f01_data {
+	struct f01_basic_properties properties;
+	struct f01_device_control device_control;
+
+	u16 doze_interval_addr;
+	u16 wakeup_threshold_addr;
+	u16 doze_holdoff_addr;
+
+	bool suspended;
+	bool old_nosleep;
+
+	unsigned int num_of_irq_regs;
+};
+
+static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
+				   u16 query_base_addr,
+				   struct f01_basic_properties *props)
+{
+	u8 queries[RMI_F01_BASIC_QUERY_LEN];
+	int ret;
+	int query_offset = query_base_addr;
+	bool has_ds4_queries = false;
+	bool has_query42 = false;
+	bool has_sensor_id = false;
+	bool has_package_id_query = false;
+	bool has_build_id_query = false;
+	u16 prod_info_addr;
+	u8 ds4_query_len;
+
+	ret = rmi_read_block(rmi_dev, query_offset,
+			       queries, RMI_F01_BASIC_QUERY_LEN);
+	if (ret) {
+		dev_err(&rmi_dev->dev,
+			"Failed to read device query registers: %d\n", ret);
+		return ret;
+	}
+
+	prod_info_addr = query_offset + 17;
+	query_offset += RMI_F01_BASIC_QUERY_LEN;
+
+	/* Now parse what we got */
+	props->manufacturer_id = queries[0];
+
+	props->has_lts = queries[1] & RMI_F01_QRY1_HAS_LTS;
+	props->has_adjustable_doze =
+			queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE;
+	props->has_adjustable_doze_holdoff =
+			queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF;
+	has_query42 = queries[1] & RMI_F01_QRY1_HAS_QUERY42;
+	has_sensor_id = queries[1] & RMI_F01_QRY1_HAS_SENSOR_ID;
+
+	snprintf(props->dom, sizeof(props->dom), "20%02d/%02d/%02d",
+		 queries[5] & RMI_F01_QRY5_YEAR_MASK,
+		 queries[6] & RMI_F01_QRY6_MONTH_MASK,
+		 queries[7] & RMI_F01_QRY7_DAY_MASK);
+
+	memcpy(props->product_id, &queries[11],
+		RMI_PRODUCT_ID_LENGTH);
+	props->product_id[RMI_PRODUCT_ID_LENGTH] = '\0';
+
+	props->productinfo =
+			((queries[2] & RMI_F01_QRY2_PRODINFO_MASK) << 7) |
+			(queries[3] & RMI_F01_QRY2_PRODINFO_MASK);
+
+	if (has_sensor_id)
+		query_offset++;
+
+	if (has_query42) {
+		ret = rmi_read(rmi_dev, query_offset, queries);
+		if (ret) {
+			dev_err(&rmi_dev->dev,
+				"Failed to read query 42 register: %d\n", ret);
+			return ret;
+		}
+
+		has_ds4_queries = !!(queries[0] & BIT(0));
+		query_offset++;
+	}
+
+	if (has_ds4_queries) {
+		ret = rmi_read(rmi_dev, query_offset, &ds4_query_len);
+		if (ret) {
+			dev_err(&rmi_dev->dev,
+				"Failed to read DS4 queries length: %d\n", ret);
+			return ret;
+		}
+		query_offset++;
+
+		if (ds4_query_len > 0) {
+			ret = rmi_read(rmi_dev, query_offset, queries);
+			if (ret) {
+				dev_err(&rmi_dev->dev,
+					"Failed to read DS4 queries: %d\n",
+					ret);
+				return ret;
+			}
+
+			has_package_id_query = !!(queries[0] & BIT(0));
+			has_build_id_query = !!(queries[0] & BIT(1));
+		}
+
+		if (has_package_id_query) {
+			ret = rmi_read_block(rmi_dev, prod_info_addr,
+					     queries, sizeof(__le64));
+			if (ret) {
+				dev_err(&rmi_dev->dev,
+					"Failed to read package info: %d\n",
+					ret);
+				return ret;
+			}
+
+			props->package_id = get_unaligned_le64(queries);
+			prod_info_addr++;
+		}
+
+		if (has_build_id_query) {
+			ret = rmi_read_block(rmi_dev, prod_info_addr, queries,
+					    3);
+			if (ret) {
+				dev_err(&rmi_dev->dev,
+					"Failed to read product info: %d\n",
+					ret);
+				return ret;
+			}
+
+			props->firmware_id = queries[1] << 8 | queries[0];
+			props->firmware_id += queries[2] * 65536;
+		}
+	}
+
+	return 0;
+}
+
+const char *rmi_f01_get_product_ID(struct rmi_function *fn)
+{
+	struct f01_data *f01 = dev_get_drvdata(&fn->dev);
+
+	return f01->properties.product_id;
+}
+
+static ssize_t rmi_driver_manufacturer_id_show(struct device *dev,
+					       struct device_attribute *dattr,
+					       char *buf)
+{
+	struct rmi_driver_data *data = dev_get_drvdata(dev);
+	struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n",
+			 f01->properties.manufacturer_id);
+}
+
+static DEVICE_ATTR(manufacturer_id, 0444,
+		   rmi_driver_manufacturer_id_show, NULL);
+
+static ssize_t rmi_driver_dom_show(struct device *dev,
+				   struct device_attribute *dattr, char *buf)
+{
+	struct rmi_driver_data *data = dev_get_drvdata(dev);
+	struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.dom);
+}
+
+static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL);
+
+static ssize_t rmi_driver_product_id_show(struct device *dev,
+					  struct device_attribute *dattr,
+					  char *buf)
+{
+	struct rmi_driver_data *data = dev_get_drvdata(dev);
+	struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.product_id);
+}
+
+static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL);
+
+static ssize_t rmi_driver_firmware_id_show(struct device *dev,
+					   struct device_attribute *dattr,
+					   char *buf)
+{
+	struct rmi_driver_data *data = dev_get_drvdata(dev);
+	struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", f01->properties.firmware_id);
+}
+
+static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL);
+
+static ssize_t rmi_driver_package_id_show(struct device *dev,
+					  struct device_attribute *dattr,
+					  char *buf)
+{
+	struct rmi_driver_data *data = dev_get_drvdata(dev);
+	struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
+
+	u32 package_id = f01->properties.package_id;
+
+	return scnprintf(buf, PAGE_SIZE, "%04x.%04x\n",
+			 package_id & 0xffff, (package_id >> 16) & 0xffff);
+}
+
+static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL);
+
+static struct attribute *rmi_f01_attrs[] = {
+	&dev_attr_manufacturer_id.attr,
+	&dev_attr_date_of_manufacture.attr,
+	&dev_attr_product_id.attr,
+	&dev_attr_firmware_id.attr,
+	&dev_attr_package_id.attr,
+	NULL
+};
+
+static const struct attribute_group rmi_f01_attr_group = {
+	.attrs = rmi_f01_attrs,
+};
+
+#ifdef CONFIG_OF
+static int rmi_f01_of_probe(struct device *dev,
+				struct rmi_device_platform_data *pdata)
+{
+	int retval;
+	u32 val;
+
+	retval = rmi_of_property_read_u32(dev,
+			(u32 *)&pdata->power_management.nosleep,
+			"syna,nosleep-mode", 1);
+	if (retval)
+		return retval;
+
+	retval = rmi_of_property_read_u32(dev, &val,
+			"syna,wakeup-threshold", 1);
+	if (retval)
+		return retval;
+
+	pdata->power_management.wakeup_threshold = val;
+
+	retval = rmi_of_property_read_u32(dev, &val,
+			"syna,doze-holdoff-ms", 1);
+	if (retval)
+		return retval;
+
+	pdata->power_management.doze_holdoff = val * 100;
+
+	retval = rmi_of_property_read_u32(dev, &val,
+			"syna,doze-interval-ms", 1);
+	if (retval)
+		return retval;
+
+	pdata->power_management.doze_interval = val / 10;
+
+	return 0;
+}
+#else
+static inline int rmi_f01_of_probe(struct device *dev,
+					struct rmi_device_platform_data *pdata)
+{
+	return -ENODEV;
+}
+#endif
+
+static int rmi_f01_probe(struct rmi_function *fn)
+{
+	struct rmi_device *rmi_dev = fn->rmi_dev;
+	struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
+	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
+	struct f01_data *f01;
+	int error;
+	u16 ctrl_base_addr = fn->fd.control_base_addr;
+	u8 device_status;
+	u8 temp;
+
+	if (fn->dev.of_node) {
+		error = rmi_f01_of_probe(&fn->dev, pdata);
+		if (error)
+			return error;
+	}
+
+	f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL);
+	if (!f01)
+		return -ENOMEM;
+
+	f01->num_of_irq_regs = driver_data->num_of_irq_regs;
+
+	/*
+	 * Set the configured bit and (optionally) other important stuff
+	 * in the device control register.
+	 */
+
+	error = rmi_read(rmi_dev, fn->fd.control_base_addr,
+			 &f01->device_control.ctrl0);
+	if (error) {
+		dev_err(&fn->dev, "Failed to read F01 control: %d\n", error);
+		return error;
+	}
+
+	switch (pdata->power_management.nosleep) {
+	case RMI_REG_STATE_DEFAULT:
+		break;
+	case RMI_REG_STATE_OFF:
+		f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
+		break;
+	case RMI_REG_STATE_ON:
+		f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
+		break;
+	}
+
+	/*
+	 * Sleep mode might be set as a hangover from a system crash or
+	 * reboot without power cycle.  If so, clear it so the sensor
+	 * is certain to function.
+	 */
+	if ((f01->device_control.ctrl0 & RMI_F01_CTRL0_SLEEP_MODE_MASK) !=
+			RMI_SLEEP_MODE_NORMAL) {
+		dev_warn(&fn->dev,
+			 "WARNING: Non-zero sleep mode found. Clearing...\n");
+		f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
+	}
+
+	f01->device_control.ctrl0 |= RMI_F01_CTRL0_CONFIGURED_BIT;
+
+	error = rmi_write(rmi_dev, fn->fd.control_base_addr,
+			  f01->device_control.ctrl0);
+	if (error) {
+		dev_err(&fn->dev, "Failed to write F01 control: %d\n", error);
+		return error;
+	}
+
+	/* Dummy read in order to clear irqs */
+	error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp);
+	if (error < 0) {
+		dev_err(&fn->dev, "Failed to read Interrupt Status.\n");
+		return error;
+	}
+
+	error = rmi_f01_read_properties(rmi_dev, fn->fd.query_base_addr,
+					&f01->properties);
+	if (error < 0) {
+		dev_err(&fn->dev, "Failed to read F01 properties.\n");
+		return error;
+	}
+
+	dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s, fw id: %d\n",
+		 f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown",
+		 f01->properties.product_id, f01->properties.firmware_id);
+
+	/* Advance to interrupt control registers, then skip over them. */
+	ctrl_base_addr++;
+	ctrl_base_addr += f01->num_of_irq_regs;
+
+	/* read control register */
+	if (f01->properties.has_adjustable_doze) {
+		f01->doze_interval_addr = ctrl_base_addr;
+		ctrl_base_addr++;
+
+		if (pdata->power_management.doze_interval) {
+			f01->device_control.doze_interval =
+				pdata->power_management.doze_interval;
+			error = rmi_write(rmi_dev, f01->doze_interval_addr,
+					  f01->device_control.doze_interval);
+			if (error) {
+				dev_err(&fn->dev,
+					"Failed to configure F01 doze interval register: %d\n",
+					error);
+				return error;
+			}
+		} else {
+			error = rmi_read(rmi_dev, f01->doze_interval_addr,
+					 &f01->device_control.doze_interval);
+			if (error) {
+				dev_err(&fn->dev,
+					"Failed to read F01 doze interval register: %d\n",
+					error);
+				return error;
+			}
+		}
+
+		f01->wakeup_threshold_addr = ctrl_base_addr;
+		ctrl_base_addr++;
+
+		if (pdata->power_management.wakeup_threshold) {
+			f01->device_control.wakeup_threshold =
+				pdata->power_management.wakeup_threshold;
+			error = rmi_write(rmi_dev, f01->wakeup_threshold_addr,
+					  f01->device_control.wakeup_threshold);
+			if (error) {
+				dev_err(&fn->dev,
+					"Failed to configure F01 wakeup threshold register: %d\n",
+					error);
+				return error;
+			}
+		} else {
+			error = rmi_read(rmi_dev, f01->wakeup_threshold_addr,
+					 &f01->device_control.wakeup_threshold);
+			if (error < 0) {
+				dev_err(&fn->dev,
+					"Failed to read F01 wakeup threshold register: %d\n",
+					error);
+				return error;
+			}
+		}
+	}
+
+	if (f01->properties.has_lts)
+		ctrl_base_addr++;
+
+	if (f01->properties.has_adjustable_doze_holdoff) {
+		f01->doze_holdoff_addr = ctrl_base_addr;
+		ctrl_base_addr++;
+
+		if (pdata->power_management.doze_holdoff) {
+			f01->device_control.doze_holdoff =
+				pdata->power_management.doze_holdoff;
+			error = rmi_write(rmi_dev, f01->doze_holdoff_addr,
+					  f01->device_control.doze_holdoff);
+			if (error) {
+				dev_err(&fn->dev,
+					"Failed to configure F01 doze holdoff register: %d\n",
+					error);
+				return error;
+			}
+		} else {
+			error = rmi_read(rmi_dev, f01->doze_holdoff_addr,
+					 &f01->device_control.doze_holdoff);
+			if (error) {
+				dev_err(&fn->dev,
+					"Failed to read F01 doze holdoff register: %d\n",
+					error);
+				return error;
+			}
+		}
+	}
+
+	error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
+	if (error < 0) {
+		dev_err(&fn->dev,
+			"Failed to read device status: %d\n", error);
+		return error;
+	}
+
+	if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
+		dev_err(&fn->dev,
+			"Device was reset during configuration process, status: %#02x!\n",
+			RMI_F01_STATUS_CODE(device_status));
+		return -EINVAL;
+	}
+
+	dev_set_drvdata(&fn->dev, f01);
+
+	error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
+	if (error)
+		dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error);
+
+	return 0;
+}
+
+static void rmi_f01_remove(struct rmi_function *fn)
+{
+	/* Note that the bus device is used, not the F01 device */
+	sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
+}
+
+static int rmi_f01_config(struct rmi_function *fn)
+{
+	struct f01_data *f01 = dev_get_drvdata(&fn->dev);
+	int error;
+
+	error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
+			  f01->device_control.ctrl0);
+	if (error) {
+		dev_err(&fn->dev,
+			"Failed to write device_control register: %d\n", error);
+		return error;
+	}
+
+	if (f01->properties.has_adjustable_doze) {
+		error = rmi_write(fn->rmi_dev, f01->doze_interval_addr,
+				  f01->device_control.doze_interval);
+		if (error) {
+			dev_err(&fn->dev,
+				"Failed to write doze interval: %d\n", error);
+			return error;
+		}
+
+		error = rmi_write_block(fn->rmi_dev,
+					 f01->wakeup_threshold_addr,
+					 &f01->device_control.wakeup_threshold,
+					 sizeof(u8));
+		if (error) {
+			dev_err(&fn->dev,
+				"Failed to write wakeup threshold: %d\n",
+				error);
+			return error;
+		}
+	}
+
+	if (f01->properties.has_adjustable_doze_holdoff) {
+		error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr,
+				  f01->device_control.doze_holdoff);
+		if (error) {
+			dev_err(&fn->dev,
+				"Failed to write doze holdoff: %d\n", error);
+			return error;
+		}
+	}
+
+	return 0;
+}
+
+static int rmi_f01_suspend(struct rmi_function *fn)
+{
+	struct f01_data *f01 = dev_get_drvdata(&fn->dev);
+	int error;
+
+	f01->old_nosleep =
+		f01->device_control.ctrl0 & RMI_F01_CTRL0_NOSLEEP_BIT;
+	f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
+
+	f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
+	if (device_may_wakeup(fn->rmi_dev->xport->dev))
+		f01->device_control.ctrl0 |= RMI_SLEEP_MODE_RESERVED1;
+	else
+		f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP;
+
+	error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
+			  f01->device_control.ctrl0);
+	if (error) {
+		dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error);
+		if (f01->old_nosleep)
+			f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
+		f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
+		f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
+		return error;
+	}
+
+	return 0;
+}
+
+static int rmi_f01_resume(struct rmi_function *fn)
+{
+	struct f01_data *f01 = dev_get_drvdata(&fn->dev);
+	int error;
+
+	if (f01->old_nosleep)
+		f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
+
+	f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
+	f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
+
+	error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
+			  f01->device_control.ctrl0);
+	if (error) {
+		dev_err(&fn->dev,
+			"Failed to restore normal operation: %d.\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static irqreturn_t rmi_f01_attention(int irq, void *ctx)
+{
+	struct rmi_function *fn = ctx;
+	struct rmi_device *rmi_dev = fn->rmi_dev;
+	int error;
+	u8 device_status;
+
+	error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
+	if (error) {
+		dev_err(&fn->dev,
+			"Failed to read device status: %d.\n", error);
+		return IRQ_RETVAL(error);
+	}
+
+	if (RMI_F01_STATUS_BOOTLOADER(device_status))
+		dev_warn(&fn->dev,
+			 "Device in bootloader mode, please update firmware\n");
+
+	if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
+		dev_warn(&fn->dev, "Device reset detected.\n");
+		error = rmi_dev->driver->reset_handler(rmi_dev);
+		if (error) {
+			dev_err(&fn->dev, "Device reset failed: %d\n", error);
+			return IRQ_RETVAL(error);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+struct rmi_function_handler rmi_f01_handler = {
+	.driver = {
+		.name	= "rmi4_f01",
+		/*
+		 * Do not allow user unbinding F01 as it is critical
+		 * function.
+		 */
+		.suppress_bind_attrs = true,
+	},
+	.func		= 0x01,
+	.probe		= rmi_f01_probe,
+	.remove		= rmi_f01_remove,
+	.config		= rmi_f01_config,
+	.attention	= rmi_f01_attention,
+	.suspend	= rmi_f01_suspend,
+	.resume		= rmi_f01_resume,
+};