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/temperature/tmp007.c | 584 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 584 insertions(+) create mode 100644 drivers/iio/temperature/tmp007.c (limited to 'drivers/iio/temperature/tmp007.c') diff --git a/drivers/iio/temperature/tmp007.c b/drivers/iio/temperature/tmp007.c new file mode 100644 index 000000000..8d27aa3bd --- /dev/null +++ b/drivers/iio/temperature/tmp007.c @@ -0,0 +1,584 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * tmp007.c - Support for TI TMP007 IR thermopile sensor with integrated math engine + * + * Copyright (c) 2017 Manivannan Sadhasivam + * + * Driver for the Texas Instruments I2C 16-bit IR thermopile sensor + * + * (7-bit I2C slave address (0x40 - 0x47), changeable via ADR pins) + * + * Note: + * 1. This driver assumes that the sensor has been calibrated beforehand + * 2. Limit threshold events are enabled at the start + * 3. Operating mode: INT + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define TMP007_TDIE 0x01 +#define TMP007_CONFIG 0x02 +#define TMP007_TOBJECT 0x03 +#define TMP007_STATUS 0x04 +#define TMP007_STATUS_MASK 0x05 +#define TMP007_TOBJ_HIGH_LIMIT 0x06 +#define TMP007_TOBJ_LOW_LIMIT 0x07 +#define TMP007_TDIE_HIGH_LIMIT 0x08 +#define TMP007_TDIE_LOW_LIMIT 0x09 +#define TMP007_MANUFACTURER_ID 0x1e +#define TMP007_DEVICE_ID 0x1f + +#define TMP007_CONFIG_CONV_EN BIT(12) +#define TMP007_CONFIG_TC_EN BIT(6) +#define TMP007_CONFIG_CR_MASK GENMASK(11, 9) +#define TMP007_CONFIG_ALERT_EN BIT(8) +#define TMP007_CONFIG_CR_SHIFT 9 + +/* Status register flags */ +#define TMP007_STATUS_ALERT BIT(15) +#define TMP007_STATUS_CONV_READY BIT(14) +#define TMP007_STATUS_OHF BIT(13) +#define TMP007_STATUS_OLF BIT(12) +#define TMP007_STATUS_LHF BIT(11) +#define TMP007_STATUS_LLF BIT(10) +#define TMP007_STATUS_DATA_VALID BIT(9) + +#define TMP007_MANUFACTURER_MAGIC 0x5449 +#define TMP007_DEVICE_MAGIC 0x0078 + +#define TMP007_TEMP_SHIFT 2 + +struct tmp007_data { + struct i2c_client *client; + struct mutex lock; + u16 config; + u16 status_mask; +}; + +static const int tmp007_avgs[5][2] = { {4, 0}, {2, 0}, {1, 0}, + {0, 500000}, {0, 250000} }; + +static int tmp007_read_temperature(struct tmp007_data *data, u8 reg) +{ + s32 ret; + int tries = 50; + + while (tries-- > 0) { + ret = i2c_smbus_read_word_swapped(data->client, + TMP007_STATUS); + if (ret < 0) + return ret; + if ((ret & TMP007_STATUS_CONV_READY) && + !(ret & TMP007_STATUS_DATA_VALID)) + break; + msleep(100); + } + + if (tries < 0) + return -EIO; + + return i2c_smbus_read_word_swapped(data->client, reg); +} + +static int tmp007_powerdown(struct tmp007_data *data) +{ + return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG, + data->config & ~TMP007_CONFIG_CONV_EN); +} + +static int tmp007_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int *val, + int *val2, long mask) +{ + struct tmp007_data *data = iio_priv(indio_dev); + s32 ret; + int conv_rate; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (channel->channel2) { + case IIO_MOD_TEMP_AMBIENT: /* LSB: 0.03125 degree Celsius */ + ret = i2c_smbus_read_word_swapped(data->client, TMP007_TDIE); + if (ret < 0) + return ret; + break; + case IIO_MOD_TEMP_OBJECT: + ret = tmp007_read_temperature(data, TMP007_TOBJECT); + if (ret < 0) + return ret; + break; + default: + return -EINVAL; + } + + *val = sign_extend32(ret, 15) >> TMP007_TEMP_SHIFT; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 31; + *val2 = 250000; + + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_SAMP_FREQ: + conv_rate = (data->config & TMP007_CONFIG_CR_MASK) + >> TMP007_CONFIG_CR_SHIFT; + *val = tmp007_avgs[conv_rate][0]; + *val2 = tmp007_avgs[conv_rate][1]; + + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +static int tmp007_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int val, + int val2, long mask) +{ + struct tmp007_data *data = iio_priv(indio_dev); + int i; + u16 tmp; + + if (mask == IIO_CHAN_INFO_SAMP_FREQ) { + for (i = 0; i < ARRAY_SIZE(tmp007_avgs); i++) { + if ((val == tmp007_avgs[i][0]) && + (val2 == tmp007_avgs[i][1])) { + tmp = data->config & ~TMP007_CONFIG_CR_MASK; + tmp |= (i << TMP007_CONFIG_CR_SHIFT); + + return i2c_smbus_write_word_swapped(data->client, + TMP007_CONFIG, + data->config = tmp); + } + } + } + + return -EINVAL; +} + +static irqreturn_t tmp007_interrupt_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct tmp007_data *data = iio_priv(indio_dev); + int ret; + + ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS); + if ((ret < 0) || !(ret & (TMP007_STATUS_OHF | TMP007_STATUS_OLF | + TMP007_STATUS_LHF | TMP007_STATUS_LLF))) + return IRQ_NONE; + + if (ret & TMP007_STATUS_OHF) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_TEMP, 0, + IIO_MOD_TEMP_OBJECT, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns(indio_dev)); + + if (ret & TMP007_STATUS_OLF) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_TEMP, 0, + IIO_MOD_TEMP_OBJECT, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns(indio_dev)); + + if (ret & TMP007_STATUS_LHF) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_TEMP, 0, + IIO_MOD_TEMP_AMBIENT, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns(indio_dev)); + + if (ret & TMP007_STATUS_LLF) + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_TEMP, 0, + IIO_MOD_TEMP_AMBIENT, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns(indio_dev)); + + return IRQ_HANDLED; +} + +static int tmp007_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, enum iio_event_type type, + enum iio_event_direction dir, int state) +{ + struct tmp007_data *data = iio_priv(indio_dev); + unsigned int status_mask; + int ret; + + switch (chan->channel2) { + case IIO_MOD_TEMP_AMBIENT: + if (dir == IIO_EV_DIR_RISING) + status_mask = TMP007_STATUS_LHF; + else + status_mask = TMP007_STATUS_LLF; + break; + case IIO_MOD_TEMP_OBJECT: + if (dir == IIO_EV_DIR_RISING) + status_mask = TMP007_STATUS_OHF; + else + status_mask = TMP007_STATUS_OLF; + break; + default: + return -EINVAL; + } + + mutex_lock(&data->lock); + ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS_MASK); + mutex_unlock(&data->lock); + if (ret < 0) + return ret; + + if (state) + ret |= status_mask; + else + ret &= ~status_mask; + + return i2c_smbus_write_word_swapped(data->client, TMP007_STATUS_MASK, + data->status_mask = ret); +} + +static int tmp007_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, enum iio_event_type type, + enum iio_event_direction dir) +{ + struct tmp007_data *data = iio_priv(indio_dev); + unsigned int mask; + + switch (chan->channel2) { + case IIO_MOD_TEMP_AMBIENT: + if (dir == IIO_EV_DIR_RISING) + mask = TMP007_STATUS_LHF; + else + mask = TMP007_STATUS_LLF; + break; + case IIO_MOD_TEMP_OBJECT: + if (dir == IIO_EV_DIR_RISING) + mask = TMP007_STATUS_OHF; + else + mask = TMP007_STATUS_OLF; + break; + default: + return -EINVAL; + } + + return !!(data->status_mask & mask); +} + +static int tmp007_read_thresh(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, enum iio_event_type type, + enum iio_event_direction dir, enum iio_event_info info, + int *val, int *val2) +{ + struct tmp007_data *data = iio_priv(indio_dev); + int ret; + u8 reg; + + switch (chan->channel2) { + case IIO_MOD_TEMP_AMBIENT: /* LSB: 0.5 degree Celsius */ + if (dir == IIO_EV_DIR_RISING) + reg = TMP007_TDIE_HIGH_LIMIT; + else + reg = TMP007_TDIE_LOW_LIMIT; + break; + case IIO_MOD_TEMP_OBJECT: + if (dir == IIO_EV_DIR_RISING) + reg = TMP007_TOBJ_HIGH_LIMIT; + else + reg = TMP007_TOBJ_LOW_LIMIT; + break; + default: + return -EINVAL; + } + + ret = i2c_smbus_read_word_swapped(data->client, reg); + if (ret < 0) + return ret; + + /* Shift length 7 bits = 6(15:6) + 1(0.5 LSB) */ + *val = sign_extend32(ret, 15) >> 7; + + return IIO_VAL_INT; +} + +static int tmp007_write_thresh(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, enum iio_event_type type, + enum iio_event_direction dir, enum iio_event_info info, + int val, int val2) +{ + struct tmp007_data *data = iio_priv(indio_dev); + u8 reg; + + switch (chan->channel2) { + case IIO_MOD_TEMP_AMBIENT: + if (dir == IIO_EV_DIR_RISING) + reg = TMP007_TDIE_HIGH_LIMIT; + else + reg = TMP007_TDIE_LOW_LIMIT; + break; + case IIO_MOD_TEMP_OBJECT: + if (dir == IIO_EV_DIR_RISING) + reg = TMP007_TOBJ_HIGH_LIMIT; + else + reg = TMP007_TOBJ_LOW_LIMIT; + break; + default: + return -EINVAL; + } + + /* Full scale threshold value is +/- 256 degree Celsius */ + if (val < -256 || val > 255) + return -EINVAL; + + /* Shift length 7 bits = 6(15:6) + 1(0.5 LSB) */ + return i2c_smbus_write_word_swapped(data->client, reg, (val << 7)); +} + +static IIO_CONST_ATTR(sampling_frequency_available, "4 2 1 0.5 0.25"); + +static struct attribute *tmp007_attributes[] = { + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group tmp007_attribute_group = { + .attrs = tmp007_attributes, +}; + +static const struct iio_event_spec tmp007_obj_event[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_event_spec tmp007_die_event[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_chan_spec tmp007_channels[] = { + { + .type = IIO_TEMP, + .modified = 1, + .channel2 = IIO_MOD_TEMP_AMBIENT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .event_spec = tmp007_die_event, + .num_event_specs = ARRAY_SIZE(tmp007_die_event), + }, + { + .type = IIO_TEMP, + .modified = 1, + .channel2 = IIO_MOD_TEMP_OBJECT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .event_spec = tmp007_obj_event, + .num_event_specs = ARRAY_SIZE(tmp007_obj_event), + } +}; + +static const struct iio_info tmp007_info = { + .read_raw = tmp007_read_raw, + .write_raw = tmp007_write_raw, + .read_event_config = tmp007_read_event_config, + .write_event_config = tmp007_write_event_config, + .read_event_value = tmp007_read_thresh, + .write_event_value = tmp007_write_thresh, + .attrs = &tmp007_attribute_group, +}; + +static bool tmp007_identify(struct i2c_client *client) +{ + int manf_id, dev_id; + + manf_id = i2c_smbus_read_word_swapped(client, TMP007_MANUFACTURER_ID); + if (manf_id < 0) + return false; + + dev_id = i2c_smbus_read_word_swapped(client, TMP007_DEVICE_ID); + if (dev_id < 0) + return false; + + return (manf_id == TMP007_MANUFACTURER_MAGIC && dev_id == TMP007_DEVICE_MAGIC); +} + +static void tmp007_powerdown_action_cb(void *priv) +{ + struct tmp007_data *data = priv; + + tmp007_powerdown(data); +} + +static int tmp007_probe(struct i2c_client *client) +{ + const struct i2c_device_id *tmp007_id = i2c_client_get_device_id(client); + struct tmp007_data *data; + struct iio_dev *indio_dev; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return -EOPNOTSUPP; + + if (!tmp007_identify(client)) { + dev_err(&client->dev, "TMP007 not found\n"); + return -ENODEV; + } + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + mutex_init(&data->lock); + + indio_dev->name = "tmp007"; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &tmp007_info; + + indio_dev->channels = tmp007_channels; + indio_dev->num_channels = ARRAY_SIZE(tmp007_channels); + + /* + * Set Configuration register: + * 1. Conversion ON + * 2. ALERT enable + * 3. Transient correction enable + */ + + ret = i2c_smbus_read_word_swapped(data->client, TMP007_CONFIG); + if (ret < 0) + return ret; + + data->config = ret; + data->config |= (TMP007_CONFIG_CONV_EN | TMP007_CONFIG_ALERT_EN | TMP007_CONFIG_TC_EN); + + ret = i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG, + data->config); + if (ret < 0) + return ret; + + ret = devm_add_action_or_reset(&client->dev, tmp007_powerdown_action_cb, data); + if (ret) + return ret; + + /* + * Only the following flags can activate ALERT pin. Data conversion/validity flags + * flags can still be polled for getting temperature data + * + * Set Status Mask register: + * 1. Object temperature high limit enable + * 2. Object temperature low limit enable + * 3. TDIE temperature high limit enable + * 4. TDIE temperature low limit enable + */ + + ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS_MASK); + if (ret < 0) + return ret; + + data->status_mask = ret; + data->status_mask |= (TMP007_STATUS_OHF | TMP007_STATUS_OLF + | TMP007_STATUS_LHF | TMP007_STATUS_LLF); + + ret = i2c_smbus_write_word_swapped(data->client, TMP007_STATUS_MASK, data->status_mask); + if (ret < 0) + return ret; + + if (client->irq) { + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, tmp007_interrupt_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + tmp007_id->name, indio_dev); + if (ret) { + dev_err(&client->dev, "irq request error %d\n", -ret); + return ret; + } + } + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static int tmp007_suspend(struct device *dev) +{ + struct tmp007_data *data = iio_priv(i2c_get_clientdata( + to_i2c_client(dev))); + + return tmp007_powerdown(data); +} + +static int tmp007_resume(struct device *dev) +{ + struct tmp007_data *data = iio_priv(i2c_get_clientdata( + to_i2c_client(dev))); + + return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG, + data->config | TMP007_CONFIG_CONV_EN); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(tmp007_pm_ops, tmp007_suspend, tmp007_resume); + +static const struct of_device_id tmp007_of_match[] = { + { .compatible = "ti,tmp007", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tmp007_of_match); + +static const struct i2c_device_id tmp007_id[] = { + { "tmp007", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tmp007_id); + +static struct i2c_driver tmp007_driver = { + .driver = { + .name = "tmp007", + .of_match_table = tmp007_of_match, + .pm = pm_sleep_ptr(&tmp007_pm_ops), + }, + .probe_new = tmp007_probe, + .id_table = tmp007_id, +}; +module_i2c_driver(tmp007_driver); + +MODULE_AUTHOR("Manivannan Sadhasivam "); +MODULE_DESCRIPTION("TI TMP007 IR thermopile sensor driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3