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/health/max30100.c | 510 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 510 insertions(+) create mode 100644 drivers/iio/health/max30100.c (limited to 'drivers/iio/health/max30100.c') diff --git a/drivers/iio/health/max30100.c b/drivers/iio/health/max30100.c new file mode 100644 index 000000000..a80fa9852 --- /dev/null +++ b/drivers/iio/health/max30100.c @@ -0,0 +1,510 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * max30100.c - Support for MAX30100 heart rate and pulse oximeter sensor + * + * Copyright (C) 2015, 2018 + * Author: Matt Ranostay + * + * TODO: enable pulse length controls via device tree properties + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX30100_REGMAP_NAME "max30100_regmap" +#define MAX30100_DRV_NAME "max30100" + +#define MAX30100_REG_INT_STATUS 0x00 +#define MAX30100_REG_INT_STATUS_PWR_RDY BIT(0) +#define MAX30100_REG_INT_STATUS_SPO2_RDY BIT(4) +#define MAX30100_REG_INT_STATUS_HR_RDY BIT(5) +#define MAX30100_REG_INT_STATUS_FIFO_RDY BIT(7) + +#define MAX30100_REG_INT_ENABLE 0x01 +#define MAX30100_REG_INT_ENABLE_SPO2_EN BIT(0) +#define MAX30100_REG_INT_ENABLE_HR_EN BIT(1) +#define MAX30100_REG_INT_ENABLE_FIFO_EN BIT(3) +#define MAX30100_REG_INT_ENABLE_MASK 0xf0 +#define MAX30100_REG_INT_ENABLE_MASK_SHIFT 4 + +#define MAX30100_REG_FIFO_WR_PTR 0x02 +#define MAX30100_REG_FIFO_OVR_CTR 0x03 +#define MAX30100_REG_FIFO_RD_PTR 0x04 +#define MAX30100_REG_FIFO_DATA 0x05 +#define MAX30100_REG_FIFO_DATA_ENTRY_COUNT 16 +#define MAX30100_REG_FIFO_DATA_ENTRY_LEN 4 + +#define MAX30100_REG_MODE_CONFIG 0x06 +#define MAX30100_REG_MODE_CONFIG_MODE_SPO2_EN BIT(0) +#define MAX30100_REG_MODE_CONFIG_MODE_HR_EN BIT(1) +#define MAX30100_REG_MODE_CONFIG_MODE_MASK 0x03 +#define MAX30100_REG_MODE_CONFIG_TEMP_EN BIT(3) +#define MAX30100_REG_MODE_CONFIG_PWR BIT(7) + +#define MAX30100_REG_SPO2_CONFIG 0x07 +#define MAX30100_REG_SPO2_CONFIG_100HZ BIT(2) +#define MAX30100_REG_SPO2_CONFIG_HI_RES_EN BIT(6) +#define MAX30100_REG_SPO2_CONFIG_1600US 0x3 + +#define MAX30100_REG_LED_CONFIG 0x09 +#define MAX30100_REG_LED_CONFIG_LED_MASK 0x0f +#define MAX30100_REG_LED_CONFIG_RED_LED_SHIFT 4 + +#define MAX30100_REG_LED_CONFIG_24MA 0x07 +#define MAX30100_REG_LED_CONFIG_50MA 0x0f + +#define MAX30100_REG_TEMP_INTEGER 0x16 +#define MAX30100_REG_TEMP_FRACTION 0x17 + +struct max30100_data { + struct i2c_client *client; + struct iio_dev *indio_dev; + struct mutex lock; + struct regmap *regmap; + + __be16 buffer[2]; /* 2 16-bit channels */ +}; + +static bool max30100_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX30100_REG_INT_STATUS: + case MAX30100_REG_MODE_CONFIG: + case MAX30100_REG_FIFO_WR_PTR: + case MAX30100_REG_FIFO_OVR_CTR: + case MAX30100_REG_FIFO_RD_PTR: + case MAX30100_REG_FIFO_DATA: + case MAX30100_REG_TEMP_INTEGER: + case MAX30100_REG_TEMP_FRACTION: + return true; + default: + return false; + } +} + +static const struct regmap_config max30100_regmap_config = { + .name = MAX30100_REGMAP_NAME, + + .reg_bits = 8, + .val_bits = 8, + + .max_register = MAX30100_REG_TEMP_FRACTION, + .cache_type = REGCACHE_FLAT, + + .volatile_reg = max30100_is_volatile_reg, +}; + +static const unsigned int max30100_led_current_mapping[] = { + 4400, 7600, 11000, 14200, 17400, + 20800, 24000, 27100, 30600, 33800, + 37000, 40200, 43600, 46800, 50000 +}; + +static const unsigned long max30100_scan_masks[] = {0x3, 0}; + +static const struct iio_chan_spec max30100_channels[] = { + { + .type = IIO_INTENSITY, + .channel2 = IIO_MOD_LIGHT_IR, + .modified = 1, + + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_BE, + }, + }, + { + .type = IIO_INTENSITY, + .channel2 = IIO_MOD_LIGHT_RED, + .modified = 1, + + .scan_index = 1, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_BE, + }, + }, + { + .type = IIO_TEMP, + .info_mask_separate = + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .scan_index = -1, + }, +}; + +static int max30100_set_powermode(struct max30100_data *data, bool state) +{ + return regmap_update_bits(data->regmap, MAX30100_REG_MODE_CONFIG, + MAX30100_REG_MODE_CONFIG_PWR, + state ? 0 : MAX30100_REG_MODE_CONFIG_PWR); +} + +static int max30100_clear_fifo(struct max30100_data *data) +{ + int ret; + + ret = regmap_write(data->regmap, MAX30100_REG_FIFO_WR_PTR, 0); + if (ret) + return ret; + + ret = regmap_write(data->regmap, MAX30100_REG_FIFO_OVR_CTR, 0); + if (ret) + return ret; + + return regmap_write(data->regmap, MAX30100_REG_FIFO_RD_PTR, 0); +} + +static int max30100_buffer_postenable(struct iio_dev *indio_dev) +{ + struct max30100_data *data = iio_priv(indio_dev); + int ret; + + ret = max30100_set_powermode(data, true); + if (ret) + return ret; + + return max30100_clear_fifo(data); +} + +static int max30100_buffer_predisable(struct iio_dev *indio_dev) +{ + struct max30100_data *data = iio_priv(indio_dev); + + return max30100_set_powermode(data, false); +} + +static const struct iio_buffer_setup_ops max30100_buffer_setup_ops = { + .postenable = max30100_buffer_postenable, + .predisable = max30100_buffer_predisable, +}; + +static inline int max30100_fifo_count(struct max30100_data *data) +{ + unsigned int val; + int ret; + + ret = regmap_read(data->regmap, MAX30100_REG_INT_STATUS, &val); + if (ret) + return ret; + + /* FIFO is almost full */ + if (val & MAX30100_REG_INT_STATUS_FIFO_RDY) + return MAX30100_REG_FIFO_DATA_ENTRY_COUNT - 1; + + return 0; +} + +static int max30100_read_measurement(struct max30100_data *data) +{ + int ret; + + ret = i2c_smbus_read_i2c_block_data(data->client, + MAX30100_REG_FIFO_DATA, + MAX30100_REG_FIFO_DATA_ENTRY_LEN, + (u8 *) &data->buffer); + + return (ret == MAX30100_REG_FIFO_DATA_ENTRY_LEN) ? 0 : ret; +} + +static irqreturn_t max30100_interrupt_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct max30100_data *data = iio_priv(indio_dev); + int ret, cnt = 0; + + mutex_lock(&data->lock); + + while (cnt || (cnt = max30100_fifo_count(data)) > 0) { + ret = max30100_read_measurement(data); + if (ret) + break; + + iio_push_to_buffers(data->indio_dev, data->buffer); + cnt--; + } + + mutex_unlock(&data->lock); + + return IRQ_HANDLED; +} + +static int max30100_get_current_idx(unsigned int val, int *reg) +{ + int idx; + + /* LED turned off */ + if (val == 0) { + *reg = 0; + return 0; + } + + for (idx = 0; idx < ARRAY_SIZE(max30100_led_current_mapping); idx++) { + if (max30100_led_current_mapping[idx] == val) { + *reg = idx + 1; + return 0; + } + } + + return -EINVAL; +} + +static int max30100_led_init(struct max30100_data *data) +{ + struct device *dev = &data->client->dev; + unsigned int val[2]; + int reg, ret; + + ret = device_property_read_u32_array(dev, "maxim,led-current-microamp", + (unsigned int *) &val, 2); + if (ret) { + /* Default to 24 mA RED LED, 50 mA IR LED */ + reg = (MAX30100_REG_LED_CONFIG_24MA << + MAX30100_REG_LED_CONFIG_RED_LED_SHIFT) | + MAX30100_REG_LED_CONFIG_50MA; + dev_warn(dev, "no led-current-microamp set"); + + return regmap_write(data->regmap, MAX30100_REG_LED_CONFIG, reg); + } + + /* RED LED current */ + ret = max30100_get_current_idx(val[0], ®); + if (ret) { + dev_err(dev, "invalid RED current setting %d", val[0]); + return ret; + } + + ret = regmap_update_bits(data->regmap, MAX30100_REG_LED_CONFIG, + MAX30100_REG_LED_CONFIG_LED_MASK << + MAX30100_REG_LED_CONFIG_RED_LED_SHIFT, + reg << MAX30100_REG_LED_CONFIG_RED_LED_SHIFT); + if (ret) + return ret; + + /* IR LED current */ + ret = max30100_get_current_idx(val[1], ®); + if (ret) { + dev_err(dev, "invalid IR current setting %d", val[1]); + return ret; + } + + return regmap_update_bits(data->regmap, MAX30100_REG_LED_CONFIG, + MAX30100_REG_LED_CONFIG_LED_MASK, reg); +} + +static int max30100_chip_init(struct max30100_data *data) +{ + int ret; + + /* setup LED current settings */ + ret = max30100_led_init(data); + if (ret) + return ret; + + /* enable hi-res SPO2 readings at 100Hz */ + ret = regmap_write(data->regmap, MAX30100_REG_SPO2_CONFIG, + MAX30100_REG_SPO2_CONFIG_HI_RES_EN | + MAX30100_REG_SPO2_CONFIG_100HZ); + if (ret) + return ret; + + /* enable SPO2 mode */ + ret = regmap_update_bits(data->regmap, MAX30100_REG_MODE_CONFIG, + MAX30100_REG_MODE_CONFIG_MODE_MASK, + MAX30100_REG_MODE_CONFIG_MODE_HR_EN | + MAX30100_REG_MODE_CONFIG_MODE_SPO2_EN); + if (ret) + return ret; + + /* enable FIFO interrupt */ + return regmap_update_bits(data->regmap, MAX30100_REG_INT_ENABLE, + MAX30100_REG_INT_ENABLE_MASK, + MAX30100_REG_INT_ENABLE_FIFO_EN + << MAX30100_REG_INT_ENABLE_MASK_SHIFT); +} + +static int max30100_read_temp(struct max30100_data *data, int *val) +{ + int ret; + unsigned int reg; + + ret = regmap_read(data->regmap, MAX30100_REG_TEMP_INTEGER, ®); + if (ret < 0) + return ret; + *val = reg << 4; + + ret = regmap_read(data->regmap, MAX30100_REG_TEMP_FRACTION, ®); + if (ret < 0) + return ret; + + *val |= reg & 0xf; + *val = sign_extend32(*val, 11); + + return 0; +} + +static int max30100_get_temp(struct max30100_data *data, int *val) +{ + int ret; + + /* start acquisition */ + ret = regmap_update_bits(data->regmap, MAX30100_REG_MODE_CONFIG, + MAX30100_REG_MODE_CONFIG_TEMP_EN, + MAX30100_REG_MODE_CONFIG_TEMP_EN); + if (ret) + return ret; + + msleep(35); + + return max30100_read_temp(data, val); +} + +static int max30100_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct max30100_data *data = iio_priv(indio_dev); + int ret = -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + /* + * Temperature reading can only be acquired while engine + * is running + */ + if (iio_device_claim_buffer_mode(indio_dev)) { + /* + * Replacing -EBUSY or other error code + * returned by iio_device_claim_buffer_mode() + * because user space may rely on the current + * one. + */ + ret = -EAGAIN; + } else { + ret = max30100_get_temp(data, val); + if (!ret) + ret = IIO_VAL_INT; + + iio_device_release_buffer_mode(indio_dev); + } + break; + case IIO_CHAN_INFO_SCALE: + *val = 1; /* 0.0625 */ + *val2 = 16; + ret = IIO_VAL_FRACTIONAL; + break; + } + + return ret; +} + +static const struct iio_info max30100_info = { + .read_raw = max30100_read_raw, +}; + +static int max30100_probe(struct i2c_client *client) +{ + struct max30100_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + indio_dev->name = MAX30100_DRV_NAME; + indio_dev->channels = max30100_channels; + indio_dev->info = &max30100_info; + indio_dev->num_channels = ARRAY_SIZE(max30100_channels); + indio_dev->available_scan_masks = max30100_scan_masks; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev, + &max30100_buffer_setup_ops); + if (ret) + return ret; + + data = iio_priv(indio_dev); + data->indio_dev = indio_dev; + data->client = client; + + mutex_init(&data->lock); + i2c_set_clientdata(client, indio_dev); + + data->regmap = devm_regmap_init_i2c(client, &max30100_regmap_config); + if (IS_ERR(data->regmap)) { + dev_err(&client->dev, "regmap initialization failed.\n"); + return PTR_ERR(data->regmap); + } + max30100_set_powermode(data, false); + + ret = max30100_chip_init(data); + if (ret) + return ret; + + if (client->irq <= 0) { + dev_err(&client->dev, "no valid irq defined\n"); + return -EINVAL; + } + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, max30100_interrupt_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "max30100_irq", indio_dev); + if (ret) { + dev_err(&client->dev, "request irq (%d) failed\n", client->irq); + return ret; + } + + return iio_device_register(indio_dev); +} + +static void max30100_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct max30100_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + max30100_set_powermode(data, false); +} + +static const struct i2c_device_id max30100_id[] = { + { "max30100", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, max30100_id); + +static const struct of_device_id max30100_dt_ids[] = { + { .compatible = "maxim,max30100" }, + { } +}; +MODULE_DEVICE_TABLE(of, max30100_dt_ids); + +static struct i2c_driver max30100_driver = { + .driver = { + .name = MAX30100_DRV_NAME, + .of_match_table = max30100_dt_ids, + }, + .probe_new = max30100_probe, + .remove = max30100_remove, + .id_table = max30100_id, +}; +module_i2c_driver(max30100_driver); + +MODULE_AUTHOR("Matt Ranostay "); +MODULE_DESCRIPTION("MAX30100 heart rate and pulse oximeter sensor"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3