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, 1146 insertions, 0 deletions

diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c
new file mode 100644
index 000000000..8b6a14611
--- /dev/null
+++ b/drivers/platform/x86/classmate-laptop.c
@@ -0,0 +1,1146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (C) 2009  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+#include <linux/input.h>
+#include <linux/rfkill.h>
+
+MODULE_LICENSE("GPL");
+
+struct cmpc_accel {
+	int sensitivity;
+	int g_select;
+	int inputdev_state;
+};
+
+#define CMPC_ACCEL_DEV_STATE_CLOSED	0
+#define CMPC_ACCEL_DEV_STATE_OPEN	1
+
+#define CMPC_ACCEL_SENSITIVITY_DEFAULT		5
+#define CMPC_ACCEL_G_SELECT_DEFAULT		0
+
+#define CMPC_ACCEL_HID		"ACCE0000"
+#define CMPC_ACCEL_HID_V4	"ACCE0001"
+#define CMPC_TABLET_HID		"TBLT0000"
+#define CMPC_IPML_HID	"IPML200"
+#define CMPC_KEYS_HID		"FNBT0000"
+
+/*
+ * Generic input device code.
+ */
+
+typedef void (*input_device_init)(struct input_dev *dev);
+
+static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
+				       input_device_init idev_init)
+{
+	struct input_dev *inputdev;
+	int error;
+
+	inputdev = input_allocate_device();
+	if (!inputdev)
+		return -ENOMEM;
+	inputdev->name = name;
+	inputdev->dev.parent = &acpi->dev;
+	idev_init(inputdev);
+	error = input_register_device(inputdev);
+	if (error) {
+		input_free_device(inputdev);
+		return error;
+	}
+	dev_set_drvdata(&acpi->dev, inputdev);
+	return 0;
+}
+
+static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
+{
+	struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
+	input_unregister_device(inputdev);
+	return 0;
+}
+
+/*
+ * Accelerometer code for Classmate V4
+ */
+static acpi_status cmpc_start_accel_v4(acpi_handle handle)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x3;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_stop_accel_v4(acpi_handle handle)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x4;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_accel_set_sensitivity_v4(acpi_handle handle, int val)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x02;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_accel_set_g_select_v4(acpi_handle handle, int val)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x05;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_get_accel_v4(acpi_handle handle,
+				     int16_t *x,
+				     int16_t *y,
+				     int16_t *z)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	int16_t *locs;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x01;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, &output);
+	if (ACPI_SUCCESS(status)) {
+		union acpi_object *obj;
+		obj = output.pointer;
+		locs = (int16_t *) obj->buffer.pointer;
+		*x = locs[0];
+		*y = locs[1];
+		*z = locs[2];
+		kfree(output.pointer);
+	}
+	return status;
+}
+
+static void cmpc_accel_handler_v4(struct acpi_device *dev, u32 event)
+{
+	if (event == 0x81) {
+		int16_t x, y, z;
+		acpi_status status;
+
+		status = cmpc_get_accel_v4(dev->handle, &x, &y, &z);
+		if (ACPI_SUCCESS(status)) {
+			struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+			input_report_abs(inputdev, ABS_X, x);
+			input_report_abs(inputdev, ABS_Y, y);
+			input_report_abs(inputdev, ABS_Z, z);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static ssize_t cmpc_accel_sensitivity_show_v4(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->sensitivity);
+}
+
+static ssize_t cmpc_accel_sensitivity_store_v4(struct device *dev,
+					       struct device_attribute *attr,
+					       const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long sensitivity;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &sensitivity);
+	if (r)
+		return r;
+
+	/* sensitivity must be between 1 and 127 */
+	if (sensitivity < 1 || sensitivity > 127)
+		return -EINVAL;
+
+	accel->sensitivity = sensitivity;
+	cmpc_accel_set_sensitivity_v4(acpi->handle, sensitivity);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_sensitivity_attr_v4 = {
+	.attr = { .name = "sensitivity", .mode = 0660 },
+	.show = cmpc_accel_sensitivity_show_v4,
+	.store = cmpc_accel_sensitivity_store_v4
+};
+
+static ssize_t cmpc_accel_g_select_show_v4(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->g_select);
+}
+
+static ssize_t cmpc_accel_g_select_store_v4(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long g_select;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &g_select);
+	if (r)
+		return r;
+
+	/* 0 means 1.5g, 1 means 6g, everything else is wrong */
+	if (g_select != 0 && g_select != 1)
+		return -EINVAL;
+
+	accel->g_select = g_select;
+	cmpc_accel_set_g_select_v4(acpi->handle, g_select);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_g_select_attr_v4 = {
+	.attr = { .name = "g_select", .mode = 0660 },
+	.show = cmpc_accel_g_select_show_v4,
+	.store = cmpc_accel_g_select_store_v4
+};
+
+static int cmpc_accel_open_v4(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(input->dev.parent);
+	accel = dev_get_drvdata(&input->dev);
+
+	cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+	cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+	if (ACPI_SUCCESS(cmpc_start_accel_v4(acpi->handle))) {
+		accel->inputdev_state = CMPC_ACCEL_DEV_STATE_OPEN;
+		return 0;
+	}
+	return -EIO;
+}
+
+static void cmpc_accel_close_v4(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(input->dev.parent);
+	accel = dev_get_drvdata(&input->dev);
+
+	cmpc_stop_accel_v4(acpi->handle);
+	accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+}
+
+static void cmpc_accel_idev_init_v4(struct input_dev *inputdev)
+{
+	set_bit(EV_ABS, inputdev->evbit);
+	input_set_abs_params(inputdev, ABS_X, -255, 255, 16, 0);
+	input_set_abs_params(inputdev, ABS_Y, -255, 255, 16, 0);
+	input_set_abs_params(inputdev, ABS_Z, -255, 255, 16, 0);
+	inputdev->open = cmpc_accel_open_v4;
+	inputdev->close = cmpc_accel_close_v4;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int cmpc_accel_suspend_v4(struct device *dev)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN)
+		return cmpc_stop_accel_v4(to_acpi_device(dev)->handle);
+
+	return 0;
+}
+
+static int cmpc_accel_resume_v4(struct device *dev)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN) {
+		cmpc_accel_set_sensitivity_v4(to_acpi_device(dev)->handle,
+					      accel->sensitivity);
+		cmpc_accel_set_g_select_v4(to_acpi_device(dev)->handle,
+					   accel->g_select);
+
+		if (ACPI_FAILURE(cmpc_start_accel_v4(to_acpi_device(dev)->handle)))
+			return -EIO;
+	}
+
+	return 0;
+}
+#endif
+
+static int cmpc_accel_add_v4(struct acpi_device *acpi)
+{
+	int error;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	accel = kmalloc(sizeof(*accel), GFP_KERNEL);
+	if (!accel)
+		return -ENOMEM;
+
+	accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+
+	accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
+	cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+	if (error)
+		goto failed_sensitivity;
+
+	accel->g_select = CMPC_ACCEL_G_SELECT_DEFAULT;
+	cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+	if (error)
+		goto failed_g_select;
+
+	error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel_v4",
+					    cmpc_accel_idev_init_v4);
+	if (error)
+		goto failed_input;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	dev_set_drvdata(&inputdev->dev, accel);
+
+	return 0;
+
+failed_input:
+	device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+failed_g_select:
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+failed_sensitivity:
+	kfree(accel);
+	return error;
+}
+
+static void cmpc_accel_remove_v4(struct acpi_device *acpi)
+{
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+	device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+	cmpc_remove_acpi_notify_device(acpi);
+}
+
+static SIMPLE_DEV_PM_OPS(cmpc_accel_pm, cmpc_accel_suspend_v4,
+			 cmpc_accel_resume_v4);
+
+static const struct acpi_device_id cmpc_accel_device_ids_v4[] = {
+	{CMPC_ACCEL_HID_V4, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_accel_acpi_driver_v4 = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_accel_v4",
+	.class = "cmpc_accel_v4",
+	.ids = cmpc_accel_device_ids_v4,
+	.ops = {
+		.add = cmpc_accel_add_v4,
+		.remove = cmpc_accel_remove_v4,
+		.notify = cmpc_accel_handler_v4,
+	},
+	.drv.pm = &cmpc_accel_pm,
+};
+
+
+/*
+ * Accelerometer code for Classmate versions prior to V4
+ */
+static acpi_status cmpc_start_accel(acpi_handle handle)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x3;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_stop_accel(acpi_handle handle)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x4;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x02;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	input.count = 2;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_get_accel(acpi_handle handle,
+				  unsigned char *x,
+				  unsigned char *y,
+				  unsigned char *z)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	unsigned char *locs;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x01;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, &output);
+	if (ACPI_SUCCESS(status)) {
+		union acpi_object *obj;
+		obj = output.pointer;
+		locs = obj->buffer.pointer;
+		*x = locs[0];
+		*y = locs[1];
+		*z = locs[2];
+		kfree(output.pointer);
+	}
+	return status;
+}
+
+static void cmpc_accel_handler(struct acpi_device *dev, u32 event)
+{
+	if (event == 0x81) {
+		unsigned char x, y, z;
+		acpi_status status;
+
+		status = cmpc_get_accel(dev->handle, &x, &y, &z);
+		if (ACPI_SUCCESS(status)) {
+			struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+			input_report_abs(inputdev, ABS_X, x);
+			input_report_abs(inputdev, ABS_Y, y);
+			input_report_abs(inputdev, ABS_Z, z);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->sensitivity);
+}
+
+static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long sensitivity;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &sensitivity);
+	if (r)
+		return r;
+
+	accel->sensitivity = sensitivity;
+	cmpc_accel_set_sensitivity(acpi->handle, sensitivity);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_sensitivity_attr = {
+	.attr = { .name = "sensitivity", .mode = 0660 },
+	.show = cmpc_accel_sensitivity_show,
+	.store = cmpc_accel_sensitivity_store
+};
+
+static int cmpc_accel_open(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+
+	acpi = to_acpi_device(input->dev.parent);
+	if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle)))
+		return 0;
+	return -EIO;
+}
+
+static void cmpc_accel_close(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+
+	acpi = to_acpi_device(input->dev.parent);
+	cmpc_stop_accel(acpi->handle);
+}
+
+static void cmpc_accel_idev_init(struct input_dev *inputdev)
+{
+	set_bit(EV_ABS, inputdev->evbit);
+	input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0);
+	input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0);
+	input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0);
+	inputdev->open = cmpc_accel_open;
+	inputdev->close = cmpc_accel_close;
+}
+
+static int cmpc_accel_add(struct acpi_device *acpi)
+{
+	int error;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	accel = kmalloc(sizeof(*accel), GFP_KERNEL);
+	if (!accel)
+		return -ENOMEM;
+
+	accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
+	cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+	if (error)
+		goto failed_file;
+
+	error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel",
+					    cmpc_accel_idev_init);
+	if (error)
+		goto failed_input;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	dev_set_drvdata(&inputdev->dev, accel);
+
+	return 0;
+
+failed_input:
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+failed_file:
+	kfree(accel);
+	return error;
+}
+
+static void cmpc_accel_remove(struct acpi_device *acpi)
+{
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+	cmpc_remove_acpi_notify_device(acpi);
+}
+
+static const struct acpi_device_id cmpc_accel_device_ids[] = {
+	{CMPC_ACCEL_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_accel_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_accel",
+	.class = "cmpc_accel",
+	.ids = cmpc_accel_device_ids,
+	.ops = {
+		.add = cmpc_accel_add,
+		.remove = cmpc_accel_remove,
+		.notify = cmpc_accel_handler,
+	}
+};
+
+
+/*
+ * Tablet mode code.
+ */
+static acpi_status cmpc_get_tablet(acpi_handle handle,
+				   unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0x01;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "TCMD", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
+{
+	unsigned long long val = 0;
+	struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+	if (event == 0x81) {
+		if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val))) {
+			input_report_switch(inputdev, SW_TABLET_MODE, !val);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static void cmpc_tablet_idev_init(struct input_dev *inputdev)
+{
+	unsigned long long val = 0;
+	struct acpi_device *acpi;
+
+	set_bit(EV_SW, inputdev->evbit);
+	set_bit(SW_TABLET_MODE, inputdev->swbit);
+
+	acpi = to_acpi_device(inputdev->dev.parent);
+	if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val))) {
+		input_report_switch(inputdev, SW_TABLET_MODE, !val);
+		input_sync(inputdev);
+	}
+}
+
+static int cmpc_tablet_add(struct acpi_device *acpi)
+{
+	return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet",
+					   cmpc_tablet_idev_init);
+}
+
+static void cmpc_tablet_remove(struct acpi_device *acpi)
+{
+	cmpc_remove_acpi_notify_device(acpi);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int cmpc_tablet_resume(struct device *dev)
+{
+	struct input_dev *inputdev = dev_get_drvdata(dev);
+
+	unsigned long long val = 0;
+	if (ACPI_SUCCESS(cmpc_get_tablet(to_acpi_device(dev)->handle, &val))) {
+		input_report_switch(inputdev, SW_TABLET_MODE, !val);
+		input_sync(inputdev);
+	}
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(cmpc_tablet_pm, NULL, cmpc_tablet_resume);
+
+static const struct acpi_device_id cmpc_tablet_device_ids[] = {
+	{CMPC_TABLET_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_tablet_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_tablet",
+	.class = "cmpc_tablet",
+	.ids = cmpc_tablet_device_ids,
+	.ops = {
+		.add = cmpc_tablet_add,
+		.remove = cmpc_tablet_remove,
+		.notify = cmpc_tablet_handler,
+	},
+	.drv.pm = &cmpc_tablet_pm,
+};
+
+
+/*
+ * Backlight code.
+ */
+
+static acpi_status cmpc_get_brightness(acpi_handle handle,
+				       unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0xC0;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static acpi_status cmpc_set_brightness(acpi_handle handle,
+				       unsigned long long value)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+	unsigned long long output;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0xC0;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = value;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
+	return status;
+}
+
+static int cmpc_bl_get_brightness(struct backlight_device *bd)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long brightness;
+
+	handle = bl_get_data(bd);
+	status = cmpc_get_brightness(handle, &brightness);
+	if (ACPI_SUCCESS(status))
+		return brightness;
+	else
+		return -1;
+}
+
+static int cmpc_bl_update_status(struct backlight_device *bd)
+{
+	acpi_status status;
+	acpi_handle handle;
+
+	handle = bl_get_data(bd);
+	status = cmpc_set_brightness(handle, bd->props.brightness);
+	if (ACPI_SUCCESS(status))
+		return 0;
+	else
+		return -1;
+}
+
+static const struct backlight_ops cmpc_bl_ops = {
+	.get_brightness = cmpc_bl_get_brightness,
+	.update_status = cmpc_bl_update_status
+};
+
+/*
+ * RFKILL code.
+ */
+
+static acpi_status cmpc_get_rfkill_wlan(acpi_handle handle,
+					unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0xC1;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static acpi_status cmpc_set_rfkill_wlan(acpi_handle handle,
+					unsigned long long value)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+	unsigned long long output;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0xC1;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = value;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
+	return status;
+}
+
+static void cmpc_rfkill_query(struct rfkill *rfkill, void *data)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long state;
+	bool blocked;
+
+	handle = data;
+	status = cmpc_get_rfkill_wlan(handle, &state);
+	if (ACPI_SUCCESS(status)) {
+		blocked = state & 1 ? false : true;
+		rfkill_set_sw_state(rfkill, blocked);
+	}
+}
+
+static int cmpc_rfkill_block(void *data, bool blocked)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long state;
+	bool is_blocked;
+
+	handle = data;
+	status = cmpc_get_rfkill_wlan(handle, &state);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+	/* Check if we really need to call cmpc_set_rfkill_wlan */
+	is_blocked = state & 1 ? false : true;
+	if (is_blocked != blocked) {
+		state = blocked ? 0 : 1;
+		status = cmpc_set_rfkill_wlan(handle, state);
+		if (ACPI_FAILURE(status))
+			return -ENODEV;
+	}
+	return 0;
+}
+
+static const struct rfkill_ops cmpc_rfkill_ops = {
+	.query = cmpc_rfkill_query,
+	.set_block = cmpc_rfkill_block,
+};
+
+/*
+ * Common backlight and rfkill code.
+ */
+
+struct ipml200_dev {
+	struct backlight_device *bd;
+	struct rfkill *rf;
+};
+
+static int cmpc_ipml_add(struct acpi_device *acpi)
+{
+	int retval;
+	struct ipml200_dev *ipml;
+	struct backlight_properties props;
+
+	ipml = kmalloc(sizeof(*ipml), GFP_KERNEL);
+	if (ipml == NULL)
+		return -ENOMEM;
+
+	memset(&props, 0, sizeof(struct backlight_properties));
+	props.type = BACKLIGHT_PLATFORM;
+	props.max_brightness = 7;
+	ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev,
+					     acpi->handle, &cmpc_bl_ops,
+					     &props);
+	if (IS_ERR(ipml->bd)) {
+		retval = PTR_ERR(ipml->bd);
+		goto out_bd;
+	}
+
+	ipml->rf = rfkill_alloc("cmpc_rfkill", &acpi->dev, RFKILL_TYPE_WLAN,
+				&cmpc_rfkill_ops, acpi->handle);
+	/*
+	 * If RFKILL is disabled, rfkill_alloc will return ERR_PTR(-ENODEV).
+	 * This is OK, however, since all other uses of the device will not
+	 * dereference it.
+	 */
+	if (ipml->rf) {
+		retval = rfkill_register(ipml->rf);
+		if (retval) {
+			rfkill_destroy(ipml->rf);
+			ipml->rf = NULL;
+		}
+	}
+
+	dev_set_drvdata(&acpi->dev, ipml);
+	return 0;
+
+out_bd:
+	kfree(ipml);
+	return retval;
+}
+
+static void cmpc_ipml_remove(struct acpi_device *acpi)
+{
+	struct ipml200_dev *ipml;
+
+	ipml = dev_get_drvdata(&acpi->dev);
+
+	backlight_device_unregister(ipml->bd);
+
+	if (ipml->rf) {
+		rfkill_unregister(ipml->rf);
+		rfkill_destroy(ipml->rf);
+	}
+
+	kfree(ipml);
+}
+
+static const struct acpi_device_id cmpc_ipml_device_ids[] = {
+	{CMPC_IPML_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_ipml_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc",
+	.class = "cmpc",
+	.ids = cmpc_ipml_device_ids,
+	.ops = {
+		.add = cmpc_ipml_add,
+		.remove = cmpc_ipml_remove
+	}
+};
+
+
+/*
+ * Extra keys code.
+ */
+static int cmpc_keys_codes[] = {
+	KEY_UNKNOWN,
+	KEY_WLAN,
+	KEY_SWITCHVIDEOMODE,
+	KEY_BRIGHTNESSDOWN,
+	KEY_BRIGHTNESSUP,
+	KEY_VENDOR,
+	KEY_UNKNOWN,
+	KEY_CAMERA,
+	KEY_BACK,
+	KEY_FORWARD,
+	KEY_UNKNOWN,
+	KEY_WLAN, /* NL3: 0x8b (press), 0x9b (release) */
+	KEY_MAX
+};
+
+static void cmpc_keys_handler(struct acpi_device *dev, u32 event)
+{
+	struct input_dev *inputdev;
+	int code = KEY_MAX;
+
+	if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes))
+		code = cmpc_keys_codes[event & 0x0F];
+	inputdev = dev_get_drvdata(&dev->dev);
+	input_report_key(inputdev, code, !(event & 0x10));
+	input_sync(inputdev);
+}
+
+static void cmpc_keys_idev_init(struct input_dev *inputdev)
+{
+	int i;
+
+	set_bit(EV_KEY, inputdev->evbit);
+	for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++)
+		set_bit(cmpc_keys_codes[i], inputdev->keybit);
+}
+
+static int cmpc_keys_add(struct acpi_device *acpi)
+{
+	return cmpc_add_acpi_notify_device(acpi, "cmpc_keys",
+					   cmpc_keys_idev_init);
+}
+
+static void cmpc_keys_remove(struct acpi_device *acpi)
+{
+	cmpc_remove_acpi_notify_device(acpi);
+}
+
+static const struct acpi_device_id cmpc_keys_device_ids[] = {
+	{CMPC_KEYS_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_keys_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_keys",
+	.class = "cmpc_keys",
+	.ids = cmpc_keys_device_ids,
+	.ops = {
+		.add = cmpc_keys_add,
+		.remove = cmpc_keys_remove,
+		.notify = cmpc_keys_handler,
+	}
+};
+
+
+/*
+ * General init/exit code.
+ */
+
+static int cmpc_init(void)
+{
+	int r;
+
+	r = acpi_bus_register_driver(&cmpc_keys_acpi_driver);
+	if (r)
+		goto failed_keys;
+
+	r = acpi_bus_register_driver(&cmpc_ipml_acpi_driver);
+	if (r)
+		goto failed_bl;
+
+	r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver);
+	if (r)
+		goto failed_tablet;
+
+	r = acpi_bus_register_driver(&cmpc_accel_acpi_driver);
+	if (r)
+		goto failed_accel;
+
+	r = acpi_bus_register_driver(&cmpc_accel_acpi_driver_v4);
+	if (r)
+		goto failed_accel_v4;
+
+	return r;
+
+failed_accel_v4:
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
+
+failed_accel:
+	acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
+
+failed_tablet:
+	acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
+
+failed_bl:
+	acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
+
+failed_keys:
+	return r;
+}
+
+static void cmpc_exit(void)
+{
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver_v4);
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
+}
+
+module_init(cmpc_init);
+module_exit(cmpc_exit);
+
+static const struct acpi_device_id cmpc_device_ids[] = {
+	{CMPC_ACCEL_HID, 0},
+	{CMPC_ACCEL_HID_V4, 0},
+	{CMPC_TABLET_HID, 0},
+	{CMPC_IPML_HID, 0},
+	{CMPC_KEYS_HID, 0},
+	{"", 0}
+};
+
+MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);