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/iio/chemical/atlas-ezo-sensor.c | 248 ++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 drivers/iio/chemical/atlas-ezo-sensor.c (limited to 'drivers/iio/chemical/atlas-ezo-sensor.c') diff --git a/drivers/iio/chemical/atlas-ezo-sensor.c b/drivers/iio/chemical/atlas-ezo-sensor.c new file mode 100644 index 000000000..307c3488f --- /dev/null +++ b/drivers/iio/chemical/atlas-ezo-sensor.c @@ -0,0 +1,248 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * atlas-ezo-sensor.c - Support for Atlas Scientific EZO sensors + * + * Copyright (C) 2020 Konsulko Group + * Author: Matt Ranostay + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define ATLAS_EZO_DRV_NAME "atlas-ezo-sensor" +#define ATLAS_INT_TIME_IN_MS 950 +#define ATLAS_INT_HUM_TIME_IN_MS 350 + +enum { + ATLAS_CO2_EZO, + ATLAS_O2_EZO, + ATLAS_HUM_EZO, +}; + +struct atlas_ezo_device { + const struct iio_chan_spec *channels; + int num_channels; + int delay; +}; + +struct atlas_ezo_data { + struct i2c_client *client; + const struct atlas_ezo_device *chip; + + /* lock to avoid multiple concurrent read calls */ + struct mutex lock; + + u8 buffer[8]; +}; + +#define ATLAS_CONCENTRATION_CHANNEL(_modifier) \ + { \ + .type = IIO_CONCENTRATION, \ + .modified = 1,\ + .channel2 = _modifier, \ + .info_mask_separate = \ + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \ + .scan_index = 0, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 32, \ + .storagebits = 32, \ + .endianness = IIO_CPU, \ + }, \ + } + +static const struct iio_chan_spec atlas_co2_ezo_channels[] = { + ATLAS_CONCENTRATION_CHANNEL(IIO_MOD_CO2), +}; + +static const struct iio_chan_spec atlas_o2_ezo_channels[] = { + ATLAS_CONCENTRATION_CHANNEL(IIO_MOD_O2), +}; + +static const struct iio_chan_spec atlas_hum_ezo_channels[] = { + { + .type = IIO_HUMIDITYRELATIVE, + .info_mask_separate = + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, +}; + +static struct atlas_ezo_device atlas_ezo_devices[] = { + [ATLAS_CO2_EZO] = { + .channels = atlas_co2_ezo_channels, + .num_channels = 1, + .delay = ATLAS_INT_TIME_IN_MS, + }, + [ATLAS_O2_EZO] = { + .channels = atlas_o2_ezo_channels, + .num_channels = 1, + .delay = ATLAS_INT_TIME_IN_MS, + }, + [ATLAS_HUM_EZO] = { + .channels = atlas_hum_ezo_channels, + .num_channels = 1, + .delay = ATLAS_INT_HUM_TIME_IN_MS, + }, +}; + +static void atlas_ezo_sanitize(char *buf) +{ + char *ptr = strchr(buf, '.'); + + if (!ptr) + return; + + memmove(ptr, ptr + 1, strlen(ptr)); +} + +static int atlas_ezo_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct atlas_ezo_data *data = iio_priv(indio_dev); + struct i2c_client *client = data->client; + + if (chan->type != IIO_CONCENTRATION) + return -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: { + int ret; + long tmp; + + mutex_lock(&data->lock); + + tmp = i2c_smbus_write_byte(client, 'R'); + + if (tmp < 0) { + mutex_unlock(&data->lock); + return tmp; + } + + msleep(data->chip->delay); + + tmp = i2c_master_recv(client, data->buffer, sizeof(data->buffer)); + + if (tmp < 0 || data->buffer[0] != 1) { + mutex_unlock(&data->lock); + return -EBUSY; + } + + /* removing floating point for fixed number representation */ + atlas_ezo_sanitize(data->buffer + 2); + + ret = kstrtol(data->buffer + 1, 10, &tmp); + + *val = tmp; + + mutex_unlock(&data->lock); + + return ret ? ret : IIO_VAL_INT; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + *val = 10; + return IIO_VAL_INT; + case IIO_CONCENTRATION: + break; + default: + return -EINVAL; + } + + /* IIO_CONCENTRATION modifiers */ + switch (chan->channel2) { + case IIO_MOD_CO2: + *val = 0; + *val2 = 100; /* 0.0001 */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_MOD_O2: + *val = 100; + return IIO_VAL_INT; + } + return -EINVAL; + } + + return 0; +} + +static const struct iio_info atlas_info = { + .read_raw = atlas_ezo_read_raw, +}; + +static const struct i2c_device_id atlas_ezo_id[] = { + { "atlas-co2-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_CO2_EZO] }, + { "atlas-o2-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_O2_EZO] }, + { "atlas-hum-ezo", (kernel_ulong_t)&atlas_ezo_devices[ATLAS_HUM_EZO] }, + {} +}; +MODULE_DEVICE_TABLE(i2c, atlas_ezo_id); + +static const struct of_device_id atlas_ezo_dt_ids[] = { + { .compatible = "atlas,co2-ezo", .data = &atlas_ezo_devices[ATLAS_CO2_EZO], }, + { .compatible = "atlas,o2-ezo", .data = &atlas_ezo_devices[ATLAS_O2_EZO], }, + { .compatible = "atlas,hum-ezo", .data = &atlas_ezo_devices[ATLAS_HUM_EZO], }, + {} +}; +MODULE_DEVICE_TABLE(of, atlas_ezo_dt_ids); + +static int atlas_ezo_probe(struct i2c_client *client) +{ + const struct i2c_device_id *id = i2c_client_get_device_id(client); + const struct atlas_ezo_device *chip; + struct atlas_ezo_data *data; + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + if (dev_fwnode(&client->dev)) + chip = device_get_match_data(&client->dev); + else + chip = (const struct atlas_ezo_device *)id->driver_data; + if (!chip) + return -EINVAL; + + indio_dev->info = &atlas_info; + indio_dev->name = ATLAS_EZO_DRV_NAME; + indio_dev->channels = chip->channels; + indio_dev->num_channels = chip->num_channels; + indio_dev->modes = INDIO_DIRECT_MODE; + + data = iio_priv(indio_dev); + data->client = client; + data->chip = chip; + mutex_init(&data->lock); + + return devm_iio_device_register(&client->dev, indio_dev); +}; + +static struct i2c_driver atlas_ezo_driver = { + .driver = { + .name = ATLAS_EZO_DRV_NAME, + .of_match_table = atlas_ezo_dt_ids, + }, + .probe_new = atlas_ezo_probe, + .id_table = atlas_ezo_id, +}; +module_i2c_driver(atlas_ezo_driver); + +MODULE_AUTHOR("Matt Ranostay "); +MODULE_DESCRIPTION("Atlas Scientific EZO sensors"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3