From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/input/misc/kxtj9.c | 549 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 549 insertions(+) create mode 100644 drivers/input/misc/kxtj9.c (limited to 'drivers/input/misc/kxtj9.c') diff --git a/drivers/input/misc/kxtj9.c b/drivers/input/misc/kxtj9.c new file mode 100644 index 000000000..7e73e6e07 --- /dev/null +++ b/drivers/input/misc/kxtj9.c @@ -0,0 +1,549 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2011 Kionix, Inc. + * Written by Chris Hudson + */ + +#include +#include +#include +#include +#include +#include +#include + +#define NAME "kxtj9" +#define G_MAX 8000 +/* OUTPUT REGISTERS */ +#define XOUT_L 0x06 +#define WHO_AM_I 0x0F +/* CONTROL REGISTERS */ +#define INT_REL 0x1A +#define CTRL_REG1 0x1B +#define INT_CTRL1 0x1E +#define DATA_CTRL 0x21 +/* CONTROL REGISTER 1 BITS */ +#define PC1_OFF 0x7F +#define PC1_ON (1 << 7) +/* Data ready funtion enable bit: set during probe if using irq mode */ +#define DRDYE (1 << 5) +/* DATA CONTROL REGISTER BITS */ +#define ODR12_5F 0 +#define ODR25F 1 +#define ODR50F 2 +#define ODR100F 3 +#define ODR200F 4 +#define ODR400F 5 +#define ODR800F 6 +/* INTERRUPT CONTROL REGISTER 1 BITS */ +/* Set these during probe if using irq mode */ +#define KXTJ9_IEL (1 << 3) +#define KXTJ9_IEA (1 << 4) +#define KXTJ9_IEN (1 << 5) +/* INPUT_ABS CONSTANTS */ +#define FUZZ 3 +#define FLAT 3 +/* RESUME STATE INDICES */ +#define RES_DATA_CTRL 0 +#define RES_CTRL_REG1 1 +#define RES_INT_CTRL1 2 +#define RESUME_ENTRIES 3 + +/* + * The following table lists the maximum appropriate poll interval for each + * available output data rate. + */ +static const struct { + unsigned int cutoff; + u8 mask; +} kxtj9_odr_table[] = { + { 3, ODR800F }, + { 5, ODR400F }, + { 10, ODR200F }, + { 20, ODR100F }, + { 40, ODR50F }, + { 80, ODR25F }, + { 0, ODR12_5F}, +}; + +struct kxtj9_data { + struct i2c_client *client; + struct kxtj9_platform_data pdata; + struct input_dev *input_dev; + unsigned int last_poll_interval; + u8 shift; + u8 ctrl_reg1; + u8 data_ctrl; + u8 int_ctrl; +}; + +static int kxtj9_i2c_read(struct kxtj9_data *tj9, u8 addr, u8 *data, int len) +{ + struct i2c_msg msgs[] = { + { + .addr = tj9->client->addr, + .flags = tj9->client->flags, + .len = 1, + .buf = &addr, + }, + { + .addr = tj9->client->addr, + .flags = tj9->client->flags | I2C_M_RD, + .len = len, + .buf = data, + }, + }; + + return i2c_transfer(tj9->client->adapter, msgs, 2); +} + +static void kxtj9_report_acceleration_data(struct kxtj9_data *tj9) +{ + s16 acc_data[3]; /* Data bytes from hardware xL, xH, yL, yH, zL, zH */ + s16 x, y, z; + int err; + + err = kxtj9_i2c_read(tj9, XOUT_L, (u8 *)acc_data, 6); + if (err < 0) + dev_err(&tj9->client->dev, "accelerometer data read failed\n"); + + x = le16_to_cpu(acc_data[tj9->pdata.axis_map_x]); + y = le16_to_cpu(acc_data[tj9->pdata.axis_map_y]); + z = le16_to_cpu(acc_data[tj9->pdata.axis_map_z]); + + x >>= tj9->shift; + y >>= tj9->shift; + z >>= tj9->shift; + + input_report_abs(tj9->input_dev, ABS_X, tj9->pdata.negate_x ? -x : x); + input_report_abs(tj9->input_dev, ABS_Y, tj9->pdata.negate_y ? -y : y); + input_report_abs(tj9->input_dev, ABS_Z, tj9->pdata.negate_z ? -z : z); + input_sync(tj9->input_dev); +} + +static irqreturn_t kxtj9_isr(int irq, void *dev) +{ + struct kxtj9_data *tj9 = dev; + int err; + + /* data ready is the only possible interrupt type */ + kxtj9_report_acceleration_data(tj9); + + err = i2c_smbus_read_byte_data(tj9->client, INT_REL); + if (err < 0) + dev_err(&tj9->client->dev, + "error clearing interrupt status: %d\n", err); + + return IRQ_HANDLED; +} + +static int kxtj9_update_g_range(struct kxtj9_data *tj9, u8 new_g_range) +{ + switch (new_g_range) { + case KXTJ9_G_2G: + tj9->shift = 4; + break; + case KXTJ9_G_4G: + tj9->shift = 3; + break; + case KXTJ9_G_8G: + tj9->shift = 2; + break; + default: + return -EINVAL; + } + + tj9->ctrl_reg1 &= 0xe7; + tj9->ctrl_reg1 |= new_g_range; + + return 0; +} + +static int kxtj9_update_odr(struct kxtj9_data *tj9, unsigned int poll_interval) +{ + int err; + int i; + + /* Use the lowest ODR that can support the requested poll interval */ + for (i = 0; i < ARRAY_SIZE(kxtj9_odr_table); i++) { + tj9->data_ctrl = kxtj9_odr_table[i].mask; + if (poll_interval < kxtj9_odr_table[i].cutoff) + break; + } + + err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0); + if (err < 0) + return err; + + err = i2c_smbus_write_byte_data(tj9->client, DATA_CTRL, tj9->data_ctrl); + if (err < 0) + return err; + + err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); + if (err < 0) + return err; + + return 0; +} + +static int kxtj9_device_power_on(struct kxtj9_data *tj9) +{ + if (tj9->pdata.power_on) + return tj9->pdata.power_on(); + + return 0; +} + +static void kxtj9_device_power_off(struct kxtj9_data *tj9) +{ + int err; + + tj9->ctrl_reg1 &= PC1_OFF; + err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); + if (err < 0) + dev_err(&tj9->client->dev, "soft power off failed\n"); + + if (tj9->pdata.power_off) + tj9->pdata.power_off(); +} + +static int kxtj9_enable(struct kxtj9_data *tj9) +{ + int err; + + err = kxtj9_device_power_on(tj9); + if (err < 0) + return err; + + /* ensure that PC1 is cleared before updating control registers */ + err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0); + if (err < 0) + return err; + + /* only write INT_CTRL_REG1 if in irq mode */ + if (tj9->client->irq) { + err = i2c_smbus_write_byte_data(tj9->client, + INT_CTRL1, tj9->int_ctrl); + if (err < 0) + return err; + } + + err = kxtj9_update_g_range(tj9, tj9->pdata.g_range); + if (err < 0) + return err; + + /* turn on outputs */ + tj9->ctrl_reg1 |= PC1_ON; + err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); + if (err < 0) + return err; + + err = kxtj9_update_odr(tj9, tj9->last_poll_interval); + if (err < 0) + return err; + + /* clear initial interrupt if in irq mode */ + if (tj9->client->irq) { + err = i2c_smbus_read_byte_data(tj9->client, INT_REL); + if (err < 0) { + dev_err(&tj9->client->dev, + "error clearing interrupt: %d\n", err); + goto fail; + } + } + + return 0; + +fail: + kxtj9_device_power_off(tj9); + return err; +} + +static void kxtj9_disable(struct kxtj9_data *tj9) +{ + kxtj9_device_power_off(tj9); +} + +static int kxtj9_input_open(struct input_dev *input) +{ + struct kxtj9_data *tj9 = input_get_drvdata(input); + + return kxtj9_enable(tj9); +} + +static void kxtj9_input_close(struct input_dev *dev) +{ + struct kxtj9_data *tj9 = input_get_drvdata(dev); + + kxtj9_disable(tj9); +} + +/* + * When IRQ mode is selected, we need to provide an interface to allow the user + * to change the output data rate of the part. For consistency, we are using + * the set_poll method, which accepts a poll interval in milliseconds, and then + * calls update_odr() while passing this value as an argument. In IRQ mode, the + * data outputs will not be read AT the requested poll interval, rather, the + * lowest ODR that can support the requested interval. The client application + * will be responsible for retrieving data from the input node at the desired + * interval. + */ + +/* Returns currently selected poll interval (in ms) */ +static ssize_t kxtj9_get_poll(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct kxtj9_data *tj9 = i2c_get_clientdata(client); + + return sprintf(buf, "%d\n", tj9->last_poll_interval); +} + +/* Allow users to select a new poll interval (in ms) */ +static ssize_t kxtj9_set_poll(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct kxtj9_data *tj9 = i2c_get_clientdata(client); + struct input_dev *input_dev = tj9->input_dev; + unsigned int interval; + int error; + + error = kstrtouint(buf, 10, &interval); + if (error < 0) + return error; + + /* Lock the device to prevent races with open/close (and itself) */ + mutex_lock(&input_dev->mutex); + + disable_irq(client->irq); + + /* + * Set current interval to the greater of the minimum interval or + * the requested interval + */ + tj9->last_poll_interval = max(interval, tj9->pdata.min_interval); + + kxtj9_update_odr(tj9, tj9->last_poll_interval); + + enable_irq(client->irq); + mutex_unlock(&input_dev->mutex); + + return count; +} + +static DEVICE_ATTR(poll, S_IRUGO|S_IWUSR, kxtj9_get_poll, kxtj9_set_poll); + +static struct attribute *kxtj9_attributes[] = { + &dev_attr_poll.attr, + NULL +}; + +static struct attribute_group kxtj9_attribute_group = { + .attrs = kxtj9_attributes +}; + +static void kxtj9_poll(struct input_dev *input) +{ + struct kxtj9_data *tj9 = input_get_drvdata(input); + unsigned int poll_interval = input_get_poll_interval(input); + + kxtj9_report_acceleration_data(tj9); + + if (poll_interval != tj9->last_poll_interval) { + kxtj9_update_odr(tj9, poll_interval); + tj9->last_poll_interval = poll_interval; + } +} + +static void kxtj9_platform_exit(void *data) +{ + struct kxtj9_data *tj9 = data; + + if (tj9->pdata.exit) + tj9->pdata.exit(); +} + +static int kxtj9_verify(struct kxtj9_data *tj9) +{ + int retval; + + retval = kxtj9_device_power_on(tj9); + if (retval < 0) + return retval; + + retval = i2c_smbus_read_byte_data(tj9->client, WHO_AM_I); + if (retval < 0) { + dev_err(&tj9->client->dev, "read err int source\n"); + goto out; + } + + retval = (retval != 0x07 && retval != 0x08) ? -EIO : 0; + +out: + kxtj9_device_power_off(tj9); + return retval; +} + +static int kxtj9_probe(struct i2c_client *client) +{ + const struct kxtj9_platform_data *pdata = + dev_get_platdata(&client->dev); + struct kxtj9_data *tj9; + struct input_dev *input_dev; + int err; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "client is not i2c capable\n"); + return -ENXIO; + } + + if (!pdata) { + dev_err(&client->dev, "platform data is NULL; exiting\n"); + return -EINVAL; + } + + tj9 = devm_kzalloc(&client->dev, sizeof(*tj9), GFP_KERNEL); + if (!tj9) { + dev_err(&client->dev, + "failed to allocate memory for module data\n"); + return -ENOMEM; + } + + tj9->client = client; + tj9->pdata = *pdata; + + if (pdata->init) { + err = pdata->init(); + if (err < 0) + return err; + } + + err = devm_add_action_or_reset(&client->dev, kxtj9_platform_exit, tj9); + if (err) + return err; + + err = kxtj9_verify(tj9); + if (err < 0) { + dev_err(&client->dev, "device not recognized\n"); + return err; + } + + i2c_set_clientdata(client, tj9); + + tj9->ctrl_reg1 = tj9->pdata.res_12bit | tj9->pdata.g_range; + tj9->last_poll_interval = tj9->pdata.init_interval; + + input_dev = devm_input_allocate_device(&client->dev); + if (!input_dev) { + dev_err(&client->dev, "input device allocate failed\n"); + return -ENOMEM; + } + + input_set_drvdata(input_dev, tj9); + tj9->input_dev = input_dev; + + input_dev->name = "kxtj9_accel"; + input_dev->id.bustype = BUS_I2C; + + input_dev->open = kxtj9_input_open; + input_dev->close = kxtj9_input_close; + + input_set_abs_params(input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT); + input_set_abs_params(input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT); + input_set_abs_params(input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT); + + if (client->irq <= 0) { + err = input_setup_polling(input_dev, kxtj9_poll); + if (err) + return err; + } + + err = input_register_device(input_dev); + if (err) { + dev_err(&client->dev, + "unable to register input polled device %s: %d\n", + input_dev->name, err); + return err; + } + + if (client->irq) { + /* If in irq mode, populate INT_CTRL_REG1 and enable DRDY. */ + tj9->int_ctrl |= KXTJ9_IEN | KXTJ9_IEA | KXTJ9_IEL; + tj9->ctrl_reg1 |= DRDYE; + + err = devm_request_threaded_irq(&client->dev, client->irq, + NULL, kxtj9_isr, + IRQF_TRIGGER_RISING | + IRQF_ONESHOT, + "kxtj9-irq", tj9); + if (err) { + dev_err(&client->dev, "request irq failed: %d\n", err); + return err; + } + + err = devm_device_add_group(&client->dev, + &kxtj9_attribute_group); + if (err) { + dev_err(&client->dev, "sysfs create failed: %d\n", err); + return err; + } + } + + return 0; +} + +static int __maybe_unused kxtj9_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct kxtj9_data *tj9 = i2c_get_clientdata(client); + struct input_dev *input_dev = tj9->input_dev; + + mutex_lock(&input_dev->mutex); + + if (input_device_enabled(input_dev)) + kxtj9_disable(tj9); + + mutex_unlock(&input_dev->mutex); + return 0; +} + +static int __maybe_unused kxtj9_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct kxtj9_data *tj9 = i2c_get_clientdata(client); + struct input_dev *input_dev = tj9->input_dev; + + mutex_lock(&input_dev->mutex); + + if (input_device_enabled(input_dev)) + kxtj9_enable(tj9); + + mutex_unlock(&input_dev->mutex); + return 0; +} + +static SIMPLE_DEV_PM_OPS(kxtj9_pm_ops, kxtj9_suspend, kxtj9_resume); + +static const struct i2c_device_id kxtj9_id[] = { + { NAME, 0 }, + { }, +}; + +MODULE_DEVICE_TABLE(i2c, kxtj9_id); + +static struct i2c_driver kxtj9_driver = { + .driver = { + .name = NAME, + .pm = &kxtj9_pm_ops, + }, + .probe_new = kxtj9_probe, + .id_table = kxtj9_id, +}; + +module_i2c_driver(kxtj9_driver); + +MODULE_DESCRIPTION("KXTJ9 accelerometer driver"); +MODULE_AUTHOR("Chris Hudson "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3