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/touchscreen/mms114.c | 650 +++++++++++++++++++++++++++++++++++++ 1 file changed, 650 insertions(+) create mode 100644 drivers/input/touchscreen/mms114.c (limited to 'drivers/input/touchscreen/mms114.c') diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c new file mode 100644 index 000000000..758b66939 --- /dev/null +++ b/drivers/input/touchscreen/mms114.c @@ -0,0 +1,650 @@ +// SPDX-License-Identifier: GPL-2.0 +// Melfas MMS114/MMS136/MMS152 touchscreen device driver +// +// Copyright (c) 2012 Samsung Electronics Co., Ltd. +// Author: Joonyoung Shim + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Write only registers */ +#define MMS114_MODE_CONTROL 0x01 +#define MMS114_OPERATION_MODE_MASK 0xE +#define MMS114_ACTIVE BIT(1) + +#define MMS114_XY_RESOLUTION_H 0x02 +#define MMS114_X_RESOLUTION 0x03 +#define MMS114_Y_RESOLUTION 0x04 +#define MMS114_CONTACT_THRESHOLD 0x05 +#define MMS114_MOVING_THRESHOLD 0x06 + +/* Read only registers */ +#define MMS114_PACKET_SIZE 0x0F +#define MMS114_INFORMATION 0x10 +#define MMS114_TSP_REV 0xF0 + +#define MMS152_FW_REV 0xE1 +#define MMS152_COMPAT_GROUP 0xF2 + +/* Minimum delay time is 50us between stop and start signal of i2c */ +#define MMS114_I2C_DELAY 50 + +/* 200ms needs after power on */ +#define MMS114_POWERON_DELAY 200 + +/* Touchscreen absolute values */ +#define MMS114_MAX_AREA 0xff + +#define MMS114_MAX_TOUCH 10 +#define MMS114_EVENT_SIZE 8 +#define MMS136_EVENT_SIZE 6 + +/* Touch type */ +#define MMS114_TYPE_NONE 0 +#define MMS114_TYPE_TOUCHSCREEN 1 +#define MMS114_TYPE_TOUCHKEY 2 + +enum mms_type { + TYPE_MMS114 = 114, + TYPE_MMS134S = 134, + TYPE_MMS136 = 136, + TYPE_MMS152 = 152, + TYPE_MMS345L = 345, +}; + +struct mms114_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct regulator *core_reg; + struct regulator *io_reg; + struct touchscreen_properties props; + enum mms_type type; + unsigned int contact_threshold; + unsigned int moving_threshold; + + /* Use cache data for mode control register(write only) */ + u8 cache_mode_control; +}; + +struct mms114_touch { + u8 id:4, reserved_bit4:1, type:2, pressed:1; + u8 x_hi:4, y_hi:4; + u8 x_lo; + u8 y_lo; + u8 width; + u8 strength; + u8 reserved[2]; +} __packed; + +static int __mms114_read_reg(struct mms114_data *data, unsigned int reg, + unsigned int len, u8 *val) +{ + struct i2c_client *client = data->client; + struct i2c_msg xfer[2]; + u8 buf = reg & 0xff; + int error; + + if (reg <= MMS114_MODE_CONTROL && reg + len > MMS114_MODE_CONTROL) + BUG(); + + /* Write register */ + xfer[0].addr = client->addr; + xfer[0].flags = client->flags & I2C_M_TEN; + xfer[0].len = 1; + xfer[0].buf = &buf; + + /* Read data */ + xfer[1].addr = client->addr; + xfer[1].flags = (client->flags & I2C_M_TEN) | I2C_M_RD; + xfer[1].len = len; + xfer[1].buf = val; + + error = i2c_transfer(client->adapter, xfer, 2); + if (error != 2) { + dev_err(&client->dev, + "%s: i2c transfer failed (%d)\n", __func__, error); + return error < 0 ? error : -EIO; + } + udelay(MMS114_I2C_DELAY); + + return 0; +} + +static int mms114_read_reg(struct mms114_data *data, unsigned int reg) +{ + u8 val; + int error; + + if (reg == MMS114_MODE_CONTROL) + return data->cache_mode_control; + + error = __mms114_read_reg(data, reg, 1, &val); + return error < 0 ? error : val; +} + +static int mms114_write_reg(struct mms114_data *data, unsigned int reg, + unsigned int val) +{ + struct i2c_client *client = data->client; + u8 buf[2]; + int error; + + buf[0] = reg & 0xff; + buf[1] = val & 0xff; + + error = i2c_master_send(client, buf, 2); + if (error != 2) { + dev_err(&client->dev, + "%s: i2c send failed (%d)\n", __func__, error); + return error < 0 ? error : -EIO; + } + udelay(MMS114_I2C_DELAY); + + if (reg == MMS114_MODE_CONTROL) + data->cache_mode_control = val; + + return 0; +} + +static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch) +{ + struct i2c_client *client = data->client; + struct input_dev *input_dev = data->input_dev; + unsigned int id; + unsigned int x; + unsigned int y; + + if (touch->id > MMS114_MAX_TOUCH) { + dev_err(&client->dev, "Wrong touch id (%d)\n", touch->id); + return; + } + + if (touch->type != MMS114_TYPE_TOUCHSCREEN) { + dev_err(&client->dev, "Wrong touch type (%d)\n", touch->type); + return; + } + + id = touch->id - 1; + x = touch->x_lo | touch->x_hi << 8; + y = touch->y_lo | touch->y_hi << 8; + + dev_dbg(&client->dev, + "id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n", + id, touch->type, touch->pressed, + x, y, touch->width, touch->strength); + + input_mt_slot(input_dev, id); + input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed); + + if (touch->pressed) { + touchscreen_report_pos(input_dev, &data->props, x, y, true); + input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width); + input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength); + } +} + +static irqreturn_t mms114_interrupt(int irq, void *dev_id) +{ + struct mms114_data *data = dev_id; + struct input_dev *input_dev = data->input_dev; + struct mms114_touch touch[MMS114_MAX_TOUCH]; + int packet_size; + int touch_size; + int index; + int error; + + mutex_lock(&input_dev->mutex); + if (!input_device_enabled(input_dev)) { + mutex_unlock(&input_dev->mutex); + goto out; + } + mutex_unlock(&input_dev->mutex); + + packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); + if (packet_size <= 0) + goto out; + + /* MMS136 has slightly different event size */ + if (data->type == TYPE_MMS134S || data->type == TYPE_MMS136) + touch_size = packet_size / MMS136_EVENT_SIZE; + else + touch_size = packet_size / MMS114_EVENT_SIZE; + + error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, + (u8 *)touch); + if (error < 0) + goto out; + + for (index = 0; index < touch_size; index++) + mms114_process_mt(data, touch + index); + + input_mt_report_pointer_emulation(data->input_dev, true); + input_sync(data->input_dev); + +out: + return IRQ_HANDLED; +} + +static int mms114_set_active(struct mms114_data *data, bool active) +{ + int val; + + val = mms114_read_reg(data, MMS114_MODE_CONTROL); + if (val < 0) + return val; + + val &= ~MMS114_OPERATION_MODE_MASK; + + /* If active is false, sleep mode */ + if (active) + val |= MMS114_ACTIVE; + + return mms114_write_reg(data, MMS114_MODE_CONTROL, val); +} + +static int mms114_get_version(struct mms114_data *data) +{ + struct device *dev = &data->client->dev; + u8 buf[6]; + int group; + int error; + + switch (data->type) { + case TYPE_MMS345L: + error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf); + if (error) + return error; + + dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x\n", + buf[0], buf[1], buf[2]); + break; + + case TYPE_MMS152: + error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf); + if (error) + return error; + + group = i2c_smbus_read_byte_data(data->client, + MMS152_COMPAT_GROUP); + if (group < 0) + return group; + + dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n", + buf[0], buf[1], buf[2], group); + break; + + case TYPE_MMS114: + case TYPE_MMS134S: + case TYPE_MMS136: + error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf); + if (error) + return error; + + dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n", + buf[0], buf[1], buf[3]); + break; + } + + return 0; +} + +static int mms114_setup_regs(struct mms114_data *data) +{ + const struct touchscreen_properties *props = &data->props; + int val; + int error; + + error = mms114_get_version(data); + if (error < 0) + return error; + + /* MMS114, MMS134S and MMS136 have configuration and power on registers */ + if (data->type != TYPE_MMS114 && data->type != TYPE_MMS134S && + data->type != TYPE_MMS136) + return 0; + + error = mms114_set_active(data, true); + if (error < 0) + return error; + + val = (props->max_x >> 8) & 0xf; + val |= ((props->max_y >> 8) & 0xf) << 4; + error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val); + if (error < 0) + return error; + + val = props->max_x & 0xff; + error = mms114_write_reg(data, MMS114_X_RESOLUTION, val); + if (error < 0) + return error; + + val = props->max_x & 0xff; + error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val); + if (error < 0) + return error; + + if (data->contact_threshold) { + error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD, + data->contact_threshold); + if (error < 0) + return error; + } + + if (data->moving_threshold) { + error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD, + data->moving_threshold); + if (error < 0) + return error; + } + + return 0; +} + +static int mms114_start(struct mms114_data *data) +{ + struct i2c_client *client = data->client; + int error; + + error = regulator_enable(data->core_reg); + if (error) { + dev_err(&client->dev, "Failed to enable avdd: %d\n", error); + return error; + } + + error = regulator_enable(data->io_reg); + if (error) { + dev_err(&client->dev, "Failed to enable vdd: %d\n", error); + regulator_disable(data->core_reg); + return error; + } + + msleep(MMS114_POWERON_DELAY); + + error = mms114_setup_regs(data); + if (error < 0) { + regulator_disable(data->io_reg); + regulator_disable(data->core_reg); + return error; + } + + enable_irq(client->irq); + + return 0; +} + +static void mms114_stop(struct mms114_data *data) +{ + struct i2c_client *client = data->client; + int error; + + disable_irq(client->irq); + + error = regulator_disable(data->io_reg); + if (error) + dev_warn(&client->dev, "Failed to disable vdd: %d\n", error); + + error = regulator_disable(data->core_reg); + if (error) + dev_warn(&client->dev, "Failed to disable avdd: %d\n", error); +} + +static int mms114_input_open(struct input_dev *dev) +{ + struct mms114_data *data = input_get_drvdata(dev); + + return mms114_start(data); +} + +static void mms114_input_close(struct input_dev *dev) +{ + struct mms114_data *data = input_get_drvdata(dev); + + mms114_stop(data); +} + +static int mms114_parse_legacy_bindings(struct mms114_data *data) +{ + struct device *dev = &data->client->dev; + struct touchscreen_properties *props = &data->props; + + if (device_property_read_u32(dev, "x-size", &props->max_x)) { + dev_dbg(dev, "failed to get legacy x-size property\n"); + return -EINVAL; + } + + if (device_property_read_u32(dev, "y-size", &props->max_y)) { + dev_dbg(dev, "failed to get legacy y-size property\n"); + return -EINVAL; + } + + device_property_read_u32(dev, "contact-threshold", + &data->contact_threshold); + device_property_read_u32(dev, "moving-threshold", + &data->moving_threshold); + + if (device_property_read_bool(dev, "x-invert")) + props->invert_x = true; + if (device_property_read_bool(dev, "y-invert")) + props->invert_y = true; + + props->swap_x_y = false; + + return 0; +} + +static int mms114_probe(struct i2c_client *client) +{ + struct mms114_data *data; + struct input_dev *input_dev; + const void *match_data; + int error; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "Not supported I2C adapter\n"); + return -ENODEV; + } + + data = devm_kzalloc(&client->dev, sizeof(struct mms114_data), + GFP_KERNEL); + input_dev = devm_input_allocate_device(&client->dev); + if (!data || !input_dev) { + dev_err(&client->dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + data->client = client; + data->input_dev = input_dev; + + match_data = device_get_match_data(&client->dev); + if (!match_data) + return -EINVAL; + + data->type = (enum mms_type)match_data; + + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X); + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y); + input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, + 0, MMS114_MAX_AREA, 0, 0); + + touchscreen_parse_properties(input_dev, true, &data->props); + if (!data->props.max_x || !data->props.max_y) { + dev_dbg(&client->dev, + "missing X/Y size properties, trying legacy bindings\n"); + error = mms114_parse_legacy_bindings(data); + if (error) + return error; + + input_set_abs_params(input_dev, ABS_MT_POSITION_X, + 0, data->props.max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, data->props.max_y, 0, 0); + } + + if (data->type == TYPE_MMS114 || data->type == TYPE_MMS134S || + data->type == TYPE_MMS136) { + /* + * The firmware handles movement and pressure fuzz, so + * don't duplicate that in software. + */ + data->moving_threshold = input_abs_get_fuzz(input_dev, + ABS_MT_POSITION_X); + data->contact_threshold = input_abs_get_fuzz(input_dev, + ABS_MT_PRESSURE); + input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0); + input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0); + input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0); + } + + input_dev->name = devm_kasprintf(&client->dev, GFP_KERNEL, + "MELFAS MMS%d Touchscreen", + data->type); + if (!input_dev->name) + return -ENOMEM; + + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &client->dev; + input_dev->open = mms114_input_open; + input_dev->close = mms114_input_close; + + error = input_mt_init_slots(input_dev, MMS114_MAX_TOUCH, + INPUT_MT_DIRECT); + if (error) + return error; + + input_set_drvdata(input_dev, data); + i2c_set_clientdata(client, data); + + data->core_reg = devm_regulator_get(&client->dev, "avdd"); + if (IS_ERR(data->core_reg)) { + error = PTR_ERR(data->core_reg); + dev_err(&client->dev, + "Unable to get the Core regulator (%d)\n", error); + return error; + } + + data->io_reg = devm_regulator_get(&client->dev, "vdd"); + if (IS_ERR(data->io_reg)) { + error = PTR_ERR(data->io_reg); + dev_err(&client->dev, + "Unable to get the IO regulator (%d)\n", error); + return error; + } + + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, mms114_interrupt, + IRQF_ONESHOT | IRQF_NO_AUTOEN, + dev_name(&client->dev), data); + if (error) { + dev_err(&client->dev, "Failed to register interrupt\n"); + return error; + } + + error = input_register_device(data->input_dev); + if (error) { + dev_err(&client->dev, "Failed to register input device\n"); + return error; + } + + return 0; +} + +static int __maybe_unused mms114_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct mms114_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + int id; + + /* Release all touch */ + for (id = 0; id < MMS114_MAX_TOUCH; id++) { + input_mt_slot(input_dev, id); + input_mt_report_slot_inactive(input_dev); + } + + input_mt_report_pointer_emulation(input_dev, true); + input_sync(input_dev); + + mutex_lock(&input_dev->mutex); + if (input_device_enabled(input_dev)) + mms114_stop(data); + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int __maybe_unused mms114_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct mms114_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + int error; + + mutex_lock(&input_dev->mutex); + if (input_device_enabled(input_dev)) { + error = mms114_start(data); + if (error < 0) { + mutex_unlock(&input_dev->mutex); + return error; + } + } + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume); + +static const struct i2c_device_id mms114_id[] = { + { "mms114", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mms114_id); + +#ifdef CONFIG_OF +static const struct of_device_id mms114_dt_match[] = { + { + .compatible = "melfas,mms114", + .data = (void *)TYPE_MMS114, + }, { + .compatible = "melfas,mms134s", + .data = (void *)TYPE_MMS134S, + }, { + .compatible = "melfas,mms136", + .data = (void *)TYPE_MMS136, + }, { + .compatible = "melfas,mms152", + .data = (void *)TYPE_MMS152, + }, { + .compatible = "melfas,mms345l", + .data = (void *)TYPE_MMS345L, + }, + { } +}; +MODULE_DEVICE_TABLE(of, mms114_dt_match); +#endif + +static struct i2c_driver mms114_driver = { + .driver = { + .name = "mms114", + .pm = &mms114_pm_ops, + .of_match_table = of_match_ptr(mms114_dt_match), + }, + .probe_new = mms114_probe, + .id_table = mms114_id, +}; + +module_i2c_driver(mms114_driver); + +/* Module information */ +MODULE_AUTHOR("Joonyoung Shim "); +MODULE_DESCRIPTION("MELFAS mms114 Touchscreen driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3