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/pcf8574_keypad.c | 221 ++++++++++++++++++++++++++++++++++++ 1 file changed, 221 insertions(+) create mode 100644 drivers/input/misc/pcf8574_keypad.c (limited to 'drivers/input/misc/pcf8574_keypad.c') diff --git a/drivers/input/misc/pcf8574_keypad.c b/drivers/input/misc/pcf8574_keypad.c new file mode 100644 index 000000000..fd1ff3f1c --- /dev/null +++ b/drivers/input/misc/pcf8574_keypad.c @@ -0,0 +1,221 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for a keypad w/16 buttons connected to a PCF8574 I2C I/O expander + * + * Copyright 2005-2008 Analog Devices Inc. + */ + +#include +#include +#include +#include +#include +#include + +#define DRV_NAME "pcf8574_keypad" + +static const unsigned char pcf8574_kp_btncode[] = { + [0] = KEY_RESERVED, + [1] = KEY_ENTER, + [2] = KEY_BACKSLASH, + [3] = KEY_0, + [4] = KEY_RIGHTBRACE, + [5] = KEY_C, + [6] = KEY_9, + [7] = KEY_8, + [8] = KEY_7, + [9] = KEY_B, + [10] = KEY_6, + [11] = KEY_5, + [12] = KEY_4, + [13] = KEY_A, + [14] = KEY_3, + [15] = KEY_2, + [16] = KEY_1 +}; + +struct kp_data { + unsigned short btncode[ARRAY_SIZE(pcf8574_kp_btncode)]; + struct input_dev *idev; + struct i2c_client *client; + char name[64]; + char phys[32]; + unsigned char laststate; +}; + +static short read_state(struct kp_data *lp) +{ + unsigned char x, y, a, b; + + i2c_smbus_write_byte(lp->client, 240); + x = 0xF & (~(i2c_smbus_read_byte(lp->client) >> 4)); + + i2c_smbus_write_byte(lp->client, 15); + y = 0xF & (~i2c_smbus_read_byte(lp->client)); + + for (a = 0; x > 0; a++) + x = x >> 1; + for (b = 0; y > 0; b++) + y = y >> 1; + + return ((a - 1) * 4) + b; +} + +static irqreturn_t pcf8574_kp_irq_handler(int irq, void *dev_id) +{ + struct kp_data *lp = dev_id; + unsigned char nextstate = read_state(lp); + + if (lp->laststate != nextstate) { + int key_down = nextstate < ARRAY_SIZE(lp->btncode); + unsigned short keycode = key_down ? + lp->btncode[nextstate] : lp->btncode[lp->laststate]; + + input_report_key(lp->idev, keycode, key_down); + input_sync(lp->idev); + + lp->laststate = nextstate; + } + + return IRQ_HANDLED; +} + +static int pcf8574_kp_probe(struct i2c_client *client) +{ + int i, ret; + struct input_dev *idev; + struct kp_data *lp; + + if (i2c_smbus_write_byte(client, 240) < 0) { + dev_err(&client->dev, "probe: write fail\n"); + return -ENODEV; + } + + lp = kzalloc(sizeof(*lp), GFP_KERNEL); + if (!lp) + return -ENOMEM; + + idev = input_allocate_device(); + if (!idev) { + dev_err(&client->dev, "Can't allocate input device\n"); + ret = -ENOMEM; + goto fail_allocate; + } + + lp->idev = idev; + lp->client = client; + + idev->evbit[0] = BIT_MASK(EV_KEY); + idev->keycode = lp->btncode; + idev->keycodesize = sizeof(lp->btncode[0]); + idev->keycodemax = ARRAY_SIZE(lp->btncode); + + for (i = 0; i < ARRAY_SIZE(pcf8574_kp_btncode); i++) { + if (lp->btncode[i] <= KEY_MAX) { + lp->btncode[i] = pcf8574_kp_btncode[i]; + __set_bit(lp->btncode[i], idev->keybit); + } + } + __clear_bit(KEY_RESERVED, idev->keybit); + + sprintf(lp->name, DRV_NAME); + sprintf(lp->phys, "kp_data/input0"); + + idev->name = lp->name; + idev->phys = lp->phys; + idev->id.bustype = BUS_I2C; + idev->id.vendor = 0x0001; + idev->id.product = 0x0001; + idev->id.version = 0x0100; + + lp->laststate = read_state(lp); + + ret = request_threaded_irq(client->irq, NULL, pcf8574_kp_irq_handler, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + DRV_NAME, lp); + if (ret) { + dev_err(&client->dev, "IRQ %d is not free\n", client->irq); + goto fail_free_device; + } + + ret = input_register_device(idev); + if (ret) { + dev_err(&client->dev, "input_register_device() failed\n"); + goto fail_free_irq; + } + + i2c_set_clientdata(client, lp); + return 0; + + fail_free_irq: + free_irq(client->irq, lp); + fail_free_device: + input_free_device(idev); + fail_allocate: + kfree(lp); + + return ret; +} + +static void pcf8574_kp_remove(struct i2c_client *client) +{ + struct kp_data *lp = i2c_get_clientdata(client); + + free_irq(client->irq, lp); + + input_unregister_device(lp->idev); + kfree(lp); +} + +#ifdef CONFIG_PM +static int pcf8574_kp_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + enable_irq(client->irq); + + return 0; +} + +static int pcf8574_kp_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + disable_irq(client->irq); + + return 0; +} + +static const struct dev_pm_ops pcf8574_kp_pm_ops = { + .suspend = pcf8574_kp_suspend, + .resume = pcf8574_kp_resume, +}; + +#else +# define pcf8574_kp_resume NULL +# define pcf8574_kp_suspend NULL +#endif + +static const struct i2c_device_id pcf8574_kp_id[] = { + { DRV_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pcf8574_kp_id); + +static struct i2c_driver pcf8574_kp_driver = { + .driver = { + .name = DRV_NAME, +#ifdef CONFIG_PM + .pm = &pcf8574_kp_pm_ops, +#endif + }, + .probe_new = pcf8574_kp_probe, + .remove = pcf8574_kp_remove, + .id_table = pcf8574_kp_id, +}; + +module_i2c_driver(pcf8574_kp_driver); + +MODULE_AUTHOR("Michael Hennerich"); +MODULE_DESCRIPTION("Keypad input driver for 16 keys connected to PCF8574"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3