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/keyboard/matrix_keypad.c | 587 +++++++++++++++++++++++++++++++++ 1 file changed, 587 insertions(+) create mode 100644 drivers/input/keyboard/matrix_keypad.c (limited to 'drivers/input/keyboard/matrix_keypad.c') diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c new file mode 100644 index 000000000..203310727 --- /dev/null +++ b/drivers/input/keyboard/matrix_keypad.c @@ -0,0 +1,587 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * GPIO driven matrix keyboard driver + * + * Copyright (c) 2008 Marek Vasut + * + * Based on corgikbd.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct matrix_keypad { + const struct matrix_keypad_platform_data *pdata; + struct input_dev *input_dev; + unsigned int row_shift; + + DECLARE_BITMAP(disabled_gpios, MATRIX_MAX_ROWS); + + uint32_t last_key_state[MATRIX_MAX_COLS]; + struct delayed_work work; + spinlock_t lock; + bool scan_pending; + bool stopped; + bool gpio_all_disabled; +}; + +/* + * NOTE: If drive_inactive_cols is false, then the GPIO has to be put into + * HiZ when de-activated to cause minmal side effect when scanning other + * columns. In that case it is configured here to be input, otherwise it is + * driven with the inactive value. + */ +static void __activate_col(const struct matrix_keypad_platform_data *pdata, + int col, bool on) +{ + bool level_on = !pdata->active_low; + + if (on) { + gpio_direction_output(pdata->col_gpios[col], level_on); + } else { + gpio_set_value_cansleep(pdata->col_gpios[col], !level_on); + if (!pdata->drive_inactive_cols) + gpio_direction_input(pdata->col_gpios[col]); + } +} + +static void activate_col(const struct matrix_keypad_platform_data *pdata, + int col, bool on) +{ + __activate_col(pdata, col, on); + + if (on && pdata->col_scan_delay_us) + udelay(pdata->col_scan_delay_us); +} + +static void activate_all_cols(const struct matrix_keypad_platform_data *pdata, + bool on) +{ + int col; + + for (col = 0; col < pdata->num_col_gpios; col++) + __activate_col(pdata, col, on); +} + +static bool row_asserted(const struct matrix_keypad_platform_data *pdata, + int row) +{ + return gpio_get_value_cansleep(pdata->row_gpios[row]) ? + !pdata->active_low : pdata->active_low; +} + +static void enable_row_irqs(struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + int i; + + if (pdata->clustered_irq > 0) + enable_irq(pdata->clustered_irq); + else { + for (i = 0; i < pdata->num_row_gpios; i++) + enable_irq(gpio_to_irq(pdata->row_gpios[i])); + } +} + +static void disable_row_irqs(struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + int i; + + if (pdata->clustered_irq > 0) + disable_irq_nosync(pdata->clustered_irq); + else { + for (i = 0; i < pdata->num_row_gpios; i++) + disable_irq_nosync(gpio_to_irq(pdata->row_gpios[i])); + } +} + +/* + * This gets the keys from keyboard and reports it to input subsystem + */ +static void matrix_keypad_scan(struct work_struct *work) +{ + struct matrix_keypad *keypad = + container_of(work, struct matrix_keypad, work.work); + struct input_dev *input_dev = keypad->input_dev; + const unsigned short *keycodes = input_dev->keycode; + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + uint32_t new_state[MATRIX_MAX_COLS]; + int row, col, code; + + /* de-activate all columns for scanning */ + activate_all_cols(pdata, false); + + memset(new_state, 0, sizeof(new_state)); + + for (row = 0; row < pdata->num_row_gpios; row++) + gpio_direction_input(pdata->row_gpios[row]); + + /* assert each column and read the row status out */ + for (col = 0; col < pdata->num_col_gpios; col++) { + + activate_col(pdata, col, true); + + for (row = 0; row < pdata->num_row_gpios; row++) + new_state[col] |= + row_asserted(pdata, row) ? (1 << row) : 0; + + activate_col(pdata, col, false); + } + + for (col = 0; col < pdata->num_col_gpios; col++) { + uint32_t bits_changed; + + bits_changed = keypad->last_key_state[col] ^ new_state[col]; + if (bits_changed == 0) + continue; + + for (row = 0; row < pdata->num_row_gpios; row++) { + if ((bits_changed & (1 << row)) == 0) + continue; + + code = MATRIX_SCAN_CODE(row, col, keypad->row_shift); + input_event(input_dev, EV_MSC, MSC_SCAN, code); + input_report_key(input_dev, + keycodes[code], + new_state[col] & (1 << row)); + } + } + input_sync(input_dev); + + memcpy(keypad->last_key_state, new_state, sizeof(new_state)); + + activate_all_cols(pdata, true); + + /* Enable IRQs again */ + spin_lock_irq(&keypad->lock); + keypad->scan_pending = false; + enable_row_irqs(keypad); + spin_unlock_irq(&keypad->lock); +} + +static irqreturn_t matrix_keypad_interrupt(int irq, void *id) +{ + struct matrix_keypad *keypad = id; + unsigned long flags; + + spin_lock_irqsave(&keypad->lock, flags); + + /* + * See if another IRQ beaten us to it and scheduled the + * scan already. In that case we should not try to + * disable IRQs again. + */ + if (unlikely(keypad->scan_pending || keypad->stopped)) + goto out; + + disable_row_irqs(keypad); + keypad->scan_pending = true; + schedule_delayed_work(&keypad->work, + msecs_to_jiffies(keypad->pdata->debounce_ms)); + +out: + spin_unlock_irqrestore(&keypad->lock, flags); + return IRQ_HANDLED; +} + +static int matrix_keypad_start(struct input_dev *dev) +{ + struct matrix_keypad *keypad = input_get_drvdata(dev); + + keypad->stopped = false; + mb(); + + /* + * Schedule an immediate key scan to capture current key state; + * columns will be activated and IRQs be enabled after the scan. + */ + schedule_delayed_work(&keypad->work, 0); + + return 0; +} + +static void matrix_keypad_stop(struct input_dev *dev) +{ + struct matrix_keypad *keypad = input_get_drvdata(dev); + + spin_lock_irq(&keypad->lock); + keypad->stopped = true; + spin_unlock_irq(&keypad->lock); + + flush_delayed_work(&keypad->work); + /* + * matrix_keypad_scan() will leave IRQs enabled; + * we should disable them now. + */ + disable_row_irqs(keypad); +} + +static void matrix_keypad_enable_wakeup(struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + unsigned int gpio; + int i; + + if (pdata->clustered_irq > 0) { + if (enable_irq_wake(pdata->clustered_irq) == 0) + keypad->gpio_all_disabled = true; + } else { + + for (i = 0; i < pdata->num_row_gpios; i++) { + if (!test_bit(i, keypad->disabled_gpios)) { + gpio = pdata->row_gpios[i]; + + if (enable_irq_wake(gpio_to_irq(gpio)) == 0) + __set_bit(i, keypad->disabled_gpios); + } + } + } +} + +static void matrix_keypad_disable_wakeup(struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + unsigned int gpio; + int i; + + if (pdata->clustered_irq > 0) { + if (keypad->gpio_all_disabled) { + disable_irq_wake(pdata->clustered_irq); + keypad->gpio_all_disabled = false; + } + } else { + for (i = 0; i < pdata->num_row_gpios; i++) { + if (test_and_clear_bit(i, keypad->disabled_gpios)) { + gpio = pdata->row_gpios[i]; + disable_irq_wake(gpio_to_irq(gpio)); + } + } + } +} + +static int matrix_keypad_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct matrix_keypad *keypad = platform_get_drvdata(pdev); + + matrix_keypad_stop(keypad->input_dev); + + if (device_may_wakeup(&pdev->dev)) + matrix_keypad_enable_wakeup(keypad); + + return 0; +} + +static int matrix_keypad_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct matrix_keypad *keypad = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) + matrix_keypad_disable_wakeup(keypad); + + matrix_keypad_start(keypad->input_dev); + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(matrix_keypad_pm_ops, + matrix_keypad_suspend, matrix_keypad_resume); + +static int matrix_keypad_init_gpio(struct platform_device *pdev, + struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + int i, err; + + /* initialized strobe lines as outputs, activated */ + for (i = 0; i < pdata->num_col_gpios; i++) { + err = gpio_request(pdata->col_gpios[i], "matrix_kbd_col"); + if (err) { + dev_err(&pdev->dev, + "failed to request GPIO%d for COL%d\n", + pdata->col_gpios[i], i); + goto err_free_cols; + } + + gpio_direction_output(pdata->col_gpios[i], !pdata->active_low); + } + + for (i = 0; i < pdata->num_row_gpios; i++) { + err = gpio_request(pdata->row_gpios[i], "matrix_kbd_row"); + if (err) { + dev_err(&pdev->dev, + "failed to request GPIO%d for ROW%d\n", + pdata->row_gpios[i], i); + goto err_free_rows; + } + + gpio_direction_input(pdata->row_gpios[i]); + } + + if (pdata->clustered_irq > 0) { + err = request_any_context_irq(pdata->clustered_irq, + matrix_keypad_interrupt, + pdata->clustered_irq_flags, + "matrix-keypad", keypad); + if (err < 0) { + dev_err(&pdev->dev, + "Unable to acquire clustered interrupt\n"); + goto err_free_rows; + } + } else { + for (i = 0; i < pdata->num_row_gpios; i++) { + err = request_any_context_irq( + gpio_to_irq(pdata->row_gpios[i]), + matrix_keypad_interrupt, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING, + "matrix-keypad", keypad); + if (err < 0) { + dev_err(&pdev->dev, + "Unable to acquire interrupt for GPIO line %i\n", + pdata->row_gpios[i]); + goto err_free_irqs; + } + } + } + + /* initialized as disabled - enabled by input->open */ + disable_row_irqs(keypad); + return 0; + +err_free_irqs: + while (--i >= 0) + free_irq(gpio_to_irq(pdata->row_gpios[i]), keypad); + i = pdata->num_row_gpios; +err_free_rows: + while (--i >= 0) + gpio_free(pdata->row_gpios[i]); + i = pdata->num_col_gpios; +err_free_cols: + while (--i >= 0) + gpio_free(pdata->col_gpios[i]); + + return err; +} + +static void matrix_keypad_free_gpio(struct matrix_keypad *keypad) +{ + const struct matrix_keypad_platform_data *pdata = keypad->pdata; + int i; + + if (pdata->clustered_irq > 0) { + free_irq(pdata->clustered_irq, keypad); + } else { + for (i = 0; i < pdata->num_row_gpios; i++) + free_irq(gpio_to_irq(pdata->row_gpios[i]), keypad); + } + + for (i = 0; i < pdata->num_row_gpios; i++) + gpio_free(pdata->row_gpios[i]); + + for (i = 0; i < pdata->num_col_gpios; i++) + gpio_free(pdata->col_gpios[i]); +} + +#ifdef CONFIG_OF +static struct matrix_keypad_platform_data * +matrix_keypad_parse_dt(struct device *dev) +{ + struct matrix_keypad_platform_data *pdata; + struct device_node *np = dev->of_node; + unsigned int *gpios; + int ret, i, nrow, ncol; + + if (!np) { + dev_err(dev, "device lacks DT data\n"); + return ERR_PTR(-ENODEV); + } + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(dev, "could not allocate memory for platform data\n"); + return ERR_PTR(-ENOMEM); + } + + pdata->num_row_gpios = nrow = gpiod_count(dev, "row"); + pdata->num_col_gpios = ncol = gpiod_count(dev, "col"); + if (nrow < 0 || ncol < 0) { + dev_err(dev, "number of keypad rows/columns not specified\n"); + return ERR_PTR(-EINVAL); + } + + if (of_get_property(np, "linux,no-autorepeat", NULL)) + pdata->no_autorepeat = true; + + pdata->wakeup = of_property_read_bool(np, "wakeup-source") || + of_property_read_bool(np, "linux,wakeup"); /* legacy */ + + if (of_get_property(np, "gpio-activelow", NULL)) + pdata->active_low = true; + + pdata->drive_inactive_cols = + of_property_read_bool(np, "drive-inactive-cols"); + + of_property_read_u32(np, "debounce-delay-ms", &pdata->debounce_ms); + of_property_read_u32(np, "col-scan-delay-us", + &pdata->col_scan_delay_us); + + gpios = devm_kcalloc(dev, + pdata->num_row_gpios + pdata->num_col_gpios, + sizeof(unsigned int), + GFP_KERNEL); + if (!gpios) { + dev_err(dev, "could not allocate memory for gpios\n"); + return ERR_PTR(-ENOMEM); + } + + for (i = 0; i < nrow; i++) { + ret = of_get_named_gpio(np, "row-gpios", i); + if (ret < 0) + return ERR_PTR(ret); + gpios[i] = ret; + } + + for (i = 0; i < ncol; i++) { + ret = of_get_named_gpio(np, "col-gpios", i); + if (ret < 0) + return ERR_PTR(ret); + gpios[nrow + i] = ret; + } + + pdata->row_gpios = gpios; + pdata->col_gpios = &gpios[pdata->num_row_gpios]; + + return pdata; +} +#else +static inline struct matrix_keypad_platform_data * +matrix_keypad_parse_dt(struct device *dev) +{ + dev_err(dev, "no platform data defined\n"); + + return ERR_PTR(-EINVAL); +} +#endif + +static int matrix_keypad_probe(struct platform_device *pdev) +{ + const struct matrix_keypad_platform_data *pdata; + struct matrix_keypad *keypad; + struct input_dev *input_dev; + int err; + + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) { + pdata = matrix_keypad_parse_dt(&pdev->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } else if (!pdata->keymap_data) { + dev_err(&pdev->dev, "no keymap data defined\n"); + return -EINVAL; + } + + keypad = kzalloc(sizeof(struct matrix_keypad), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!keypad || !input_dev) { + err = -ENOMEM; + goto err_free_mem; + } + + keypad->input_dev = input_dev; + keypad->pdata = pdata; + keypad->row_shift = get_count_order(pdata->num_col_gpios); + keypad->stopped = true; + INIT_DELAYED_WORK(&keypad->work, matrix_keypad_scan); + spin_lock_init(&keypad->lock); + + input_dev->name = pdev->name; + input_dev->id.bustype = BUS_HOST; + input_dev->dev.parent = &pdev->dev; + input_dev->open = matrix_keypad_start; + input_dev->close = matrix_keypad_stop; + + err = matrix_keypad_build_keymap(pdata->keymap_data, NULL, + pdata->num_row_gpios, + pdata->num_col_gpios, + NULL, input_dev); + if (err) { + dev_err(&pdev->dev, "failed to build keymap\n"); + goto err_free_mem; + } + + if (!pdata->no_autorepeat) + __set_bit(EV_REP, input_dev->evbit); + input_set_capability(input_dev, EV_MSC, MSC_SCAN); + input_set_drvdata(input_dev, keypad); + + err = matrix_keypad_init_gpio(pdev, keypad); + if (err) + goto err_free_mem; + + err = input_register_device(keypad->input_dev); + if (err) + goto err_free_gpio; + + device_init_wakeup(&pdev->dev, pdata->wakeup); + platform_set_drvdata(pdev, keypad); + + return 0; + +err_free_gpio: + matrix_keypad_free_gpio(keypad); +err_free_mem: + input_free_device(input_dev); + kfree(keypad); + return err; +} + +static int matrix_keypad_remove(struct platform_device *pdev) +{ + struct matrix_keypad *keypad = platform_get_drvdata(pdev); + + matrix_keypad_free_gpio(keypad); + input_unregister_device(keypad->input_dev); + kfree(keypad); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id matrix_keypad_dt_match[] = { + { .compatible = "gpio-matrix-keypad" }, + { } +}; +MODULE_DEVICE_TABLE(of, matrix_keypad_dt_match); +#endif + +static struct platform_driver matrix_keypad_driver = { + .probe = matrix_keypad_probe, + .remove = matrix_keypad_remove, + .driver = { + .name = "matrix-keypad", + .pm = pm_sleep_ptr(&matrix_keypad_pm_ops), + .of_match_table = of_match_ptr(matrix_keypad_dt_match), + }, +}; +module_platform_driver(matrix_keypad_driver); + +MODULE_AUTHOR("Marek Vasut "); +MODULE_DESCRIPTION("GPIO Driven Matrix Keypad Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:matrix-keypad"); -- cgit v1.2.3