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/humidity/hts221_core.c | 683 +++++++++++++++++++++++++++++++++++++ 1 file changed, 683 insertions(+) create mode 100644 drivers/iio/humidity/hts221_core.c (limited to 'drivers/iio/humidity/hts221_core.c') diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c new file mode 100644 index 000000000..2a413da87 --- /dev/null +++ b/drivers/iio/humidity/hts221_core.c @@ -0,0 +1,683 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * STMicroelectronics hts221 sensor driver + * + * Copyright 2016 STMicroelectronics Inc. + * + * Lorenzo Bianconi + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "hts221.h" + +#define HTS221_REG_WHOAMI_ADDR 0x0f +#define HTS221_REG_WHOAMI_VAL 0xbc + +#define HTS221_REG_CNTRL1_ADDR 0x20 +#define HTS221_REG_CNTRL2_ADDR 0x21 + +#define HTS221_ODR_MASK 0x03 +#define HTS221_BDU_MASK BIT(2) +#define HTS221_ENABLE_MASK BIT(7) + +/* calibration registers */ +#define HTS221_REG_0RH_CAL_X_H 0x36 +#define HTS221_REG_1RH_CAL_X_H 0x3a +#define HTS221_REG_0RH_CAL_Y_H 0x30 +#define HTS221_REG_1RH_CAL_Y_H 0x31 +#define HTS221_REG_0T_CAL_X_L 0x3c +#define HTS221_REG_1T_CAL_X_L 0x3e +#define HTS221_REG_0T_CAL_Y_H 0x32 +#define HTS221_REG_1T_CAL_Y_H 0x33 +#define HTS221_REG_T1_T0_CAL_Y_H 0x35 + +struct hts221_odr { + u8 hz; + u8 val; +}; + +#define HTS221_AVG_DEPTH 8 +struct hts221_avg { + u8 addr; + u8 mask; + u16 avg_avl[HTS221_AVG_DEPTH]; +}; + +static const struct hts221_odr hts221_odr_table[] = { + { 1, 0x01 }, /* 1Hz */ + { 7, 0x02 }, /* 7Hz */ + { 13, 0x03 }, /* 12.5Hz */ +}; + +static const struct hts221_avg hts221_avg_list[] = { + { + .addr = 0x10, + .mask = 0x07, + .avg_avl = { + 4, /* 0.4 %RH */ + 8, /* 0.3 %RH */ + 16, /* 0.2 %RH */ + 32, /* 0.15 %RH */ + 64, /* 0.1 %RH */ + 128, /* 0.07 %RH */ + 256, /* 0.05 %RH */ + 512, /* 0.03 %RH */ + }, + }, + { + .addr = 0x10, + .mask = 0x38, + .avg_avl = { + 2, /* 0.08 degC */ + 4, /* 0.05 degC */ + 8, /* 0.04 degC */ + 16, /* 0.03 degC */ + 32, /* 0.02 degC */ + 64, /* 0.015 degC */ + 128, /* 0.01 degC */ + 256, /* 0.007 degC */ + }, + }, +}; + +static const struct iio_chan_spec hts221_channels[] = { + { + .type = IIO_HUMIDITYRELATIVE, + .address = 0x28, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .scan_index = 0, + .scan_type = { + .sign = 's', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_LE, + }, + }, + { + .type = IIO_TEMP, + .address = 0x2a, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_LE, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(2), +}; + +static int hts221_check_whoami(struct hts221_hw *hw) +{ + int err, data; + + err = regmap_read(hw->regmap, HTS221_REG_WHOAMI_ADDR, &data); + if (err < 0) { + dev_err(hw->dev, "failed to read whoami register\n"); + return err; + } + + if (data != HTS221_REG_WHOAMI_VAL) { + dev_err(hw->dev, "wrong whoami {%02x vs %02x}\n", + data, HTS221_REG_WHOAMI_VAL); + return -ENODEV; + } + + return 0; +} + +static int hts221_update_odr(struct hts221_hw *hw, u8 odr) +{ + int i, err; + + for (i = 0; i < ARRAY_SIZE(hts221_odr_table); i++) + if (hts221_odr_table[i].hz == odr) + break; + + if (i == ARRAY_SIZE(hts221_odr_table)) + return -EINVAL; + + err = regmap_update_bits(hw->regmap, HTS221_REG_CNTRL1_ADDR, + HTS221_ODR_MASK, + FIELD_PREP(HTS221_ODR_MASK, + hts221_odr_table[i].val)); + if (err < 0) + return err; + + hw->odr = odr; + + return 0; +} + +static int hts221_update_avg(struct hts221_hw *hw, + enum hts221_sensor_type type, + u16 val) +{ + const struct hts221_avg *avg = &hts221_avg_list[type]; + int i, err, data; + + for (i = 0; i < HTS221_AVG_DEPTH; i++) + if (avg->avg_avl[i] == val) + break; + + if (i == HTS221_AVG_DEPTH) + return -EINVAL; + + data = ((i << __ffs(avg->mask)) & avg->mask); + err = regmap_update_bits(hw->regmap, avg->addr, + avg->mask, data); + if (err < 0) + return err; + + hw->sensors[type].cur_avg_idx = i; + + return 0; +} + +static ssize_t hts221_sysfs_sampling_freq(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int i; + ssize_t len = 0; + + for (i = 0; i < ARRAY_SIZE(hts221_odr_table); i++) + len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", + hts221_odr_table[i].hz); + buf[len - 1] = '\n'; + + return len; +} + +static ssize_t +hts221_sysfs_rh_oversampling_avail(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + const struct hts221_avg *avg = &hts221_avg_list[HTS221_SENSOR_H]; + ssize_t len = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(avg->avg_avl); i++) + len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", + avg->avg_avl[i]); + buf[len - 1] = '\n'; + + return len; +} + +static ssize_t +hts221_sysfs_temp_oversampling_avail(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + const struct hts221_avg *avg = &hts221_avg_list[HTS221_SENSOR_T]; + ssize_t len = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(avg->avg_avl); i++) + len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", + avg->avg_avl[i]); + buf[len - 1] = '\n'; + + return len; +} + +int hts221_set_enable(struct hts221_hw *hw, bool enable) +{ + int err; + + err = regmap_update_bits(hw->regmap, HTS221_REG_CNTRL1_ADDR, + HTS221_ENABLE_MASK, + FIELD_PREP(HTS221_ENABLE_MASK, enable)); + if (err < 0) + return err; + + hw->enabled = enable; + + return 0; +} + +static int hts221_parse_temp_caldata(struct hts221_hw *hw) +{ + int err, *slope, *b_gen, cal0, cal1; + s16 cal_x0, cal_x1, cal_y0, cal_y1; + __le16 val; + + err = regmap_read(hw->regmap, HTS221_REG_0T_CAL_Y_H, &cal0); + if (err < 0) + return err; + + err = regmap_read(hw->regmap, HTS221_REG_T1_T0_CAL_Y_H, &cal1); + if (err < 0) + return err; + cal_y0 = ((cal1 & 0x3) << 8) | cal0; + + err = regmap_read(hw->regmap, HTS221_REG_1T_CAL_Y_H, &cal0); + if (err < 0) + return err; + cal_y1 = (((cal1 & 0xc) >> 2) << 8) | cal0; + + err = regmap_bulk_read(hw->regmap, HTS221_REG_0T_CAL_X_L, + &val, sizeof(val)); + if (err < 0) + return err; + cal_x0 = le16_to_cpu(val); + + err = regmap_bulk_read(hw->regmap, HTS221_REG_1T_CAL_X_L, + &val, sizeof(val)); + if (err < 0) + return err; + cal_x1 = le16_to_cpu(val); + + slope = &hw->sensors[HTS221_SENSOR_T].slope; + b_gen = &hw->sensors[HTS221_SENSOR_T].b_gen; + + *slope = ((cal_y1 - cal_y0) * 8000) / (cal_x1 - cal_x0); + *b_gen = (((s32)cal_x1 * cal_y0 - (s32)cal_x0 * cal_y1) * 1000) / + (cal_x1 - cal_x0); + *b_gen *= 8; + + return 0; +} + +static int hts221_parse_rh_caldata(struct hts221_hw *hw) +{ + int err, *slope, *b_gen, data; + s16 cal_x0, cal_x1, cal_y0, cal_y1; + __le16 val; + + err = regmap_read(hw->regmap, HTS221_REG_0RH_CAL_Y_H, &data); + if (err < 0) + return err; + cal_y0 = data; + + err = regmap_read(hw->regmap, HTS221_REG_1RH_CAL_Y_H, &data); + if (err < 0) + return err; + cal_y1 = data; + + err = regmap_bulk_read(hw->regmap, HTS221_REG_0RH_CAL_X_H, + &val, sizeof(val)); + if (err < 0) + return err; + cal_x0 = le16_to_cpu(val); + + err = regmap_bulk_read(hw->regmap, HTS221_REG_1RH_CAL_X_H, + &val, sizeof(val)); + if (err < 0) + return err; + cal_x1 = le16_to_cpu(val); + + slope = &hw->sensors[HTS221_SENSOR_H].slope; + b_gen = &hw->sensors[HTS221_SENSOR_H].b_gen; + + *slope = ((cal_y1 - cal_y0) * 8000) / (cal_x1 - cal_x0); + *b_gen = (((s32)cal_x1 * cal_y0 - (s32)cal_x0 * cal_y1) * 1000) / + (cal_x1 - cal_x0); + *b_gen *= 8; + + return 0; +} + +static int hts221_get_sensor_scale(struct hts221_hw *hw, + enum iio_chan_type ch_type, + int *val, int *val2) +{ + s64 tmp; + s32 rem, div, data; + + switch (ch_type) { + case IIO_HUMIDITYRELATIVE: + data = hw->sensors[HTS221_SENSOR_H].slope; + div = (1 << 4) * 1000; + break; + case IIO_TEMP: + data = hw->sensors[HTS221_SENSOR_T].slope; + div = (1 << 6) * 1000; + break; + default: + return -EINVAL; + } + + tmp = div_s64(data * 1000000000LL, div); + tmp = div_s64_rem(tmp, 1000000000LL, &rem); + + *val = tmp; + *val2 = rem; + + return IIO_VAL_INT_PLUS_NANO; +} + +static int hts221_get_sensor_offset(struct hts221_hw *hw, + enum iio_chan_type ch_type, + int *val, int *val2) +{ + s64 tmp; + s32 rem, div, data; + + switch (ch_type) { + case IIO_HUMIDITYRELATIVE: + data = hw->sensors[HTS221_SENSOR_H].b_gen; + div = hw->sensors[HTS221_SENSOR_H].slope; + break; + case IIO_TEMP: + data = hw->sensors[HTS221_SENSOR_T].b_gen; + div = hw->sensors[HTS221_SENSOR_T].slope; + break; + default: + return -EINVAL; + } + + tmp = div_s64(data * 1000000000LL, div); + tmp = div_s64_rem(tmp, 1000000000LL, &rem); + + *val = tmp; + *val2 = rem; + + return IIO_VAL_INT_PLUS_NANO; +} + +static int hts221_read_oneshot(struct hts221_hw *hw, u8 addr, int *val) +{ + __le16 data; + int err; + + err = hts221_set_enable(hw, true); + if (err < 0) + return err; + + msleep(50); + + err = regmap_bulk_read(hw->regmap, addr, &data, sizeof(data)); + if (err < 0) + return err; + + hts221_set_enable(hw, false); + + *val = (s16)le16_to_cpu(data); + + return IIO_VAL_INT; +} + +static int hts221_read_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *ch, + int *val, int *val2, long mask) +{ + struct hts221_hw *hw = iio_priv(iio_dev); + int ret; + + ret = iio_device_claim_direct_mode(iio_dev); + if (ret) + return ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = hts221_read_oneshot(hw, ch->address, val); + break; + case IIO_CHAN_INFO_SCALE: + ret = hts221_get_sensor_scale(hw, ch->type, val, val2); + break; + case IIO_CHAN_INFO_OFFSET: + ret = hts221_get_sensor_offset(hw, ch->type, val, val2); + break; + case IIO_CHAN_INFO_SAMP_FREQ: + *val = hw->odr; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_OVERSAMPLING_RATIO: { + u8 idx; + const struct hts221_avg *avg; + + switch (ch->type) { + case IIO_HUMIDITYRELATIVE: + avg = &hts221_avg_list[HTS221_SENSOR_H]; + idx = hw->sensors[HTS221_SENSOR_H].cur_avg_idx; + *val = avg->avg_avl[idx]; + ret = IIO_VAL_INT; + break; + case IIO_TEMP: + avg = &hts221_avg_list[HTS221_SENSOR_T]; + idx = hw->sensors[HTS221_SENSOR_T].cur_avg_idx; + *val = avg->avg_avl[idx]; + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + break; + } + break; + } + default: + ret = -EINVAL; + break; + } + + iio_device_release_direct_mode(iio_dev); + + return ret; +} + +static int hts221_write_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct hts221_hw *hw = iio_priv(iio_dev); + int ret; + + ret = iio_device_claim_direct_mode(iio_dev); + if (ret) + return ret; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hts221_update_odr(hw, val); + break; + case IIO_CHAN_INFO_OVERSAMPLING_RATIO: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + ret = hts221_update_avg(hw, HTS221_SENSOR_H, val); + break; + case IIO_TEMP: + ret = hts221_update_avg(hw, HTS221_SENSOR_T, val); + break; + default: + ret = -EINVAL; + break; + } + break; + default: + ret = -EINVAL; + break; + } + + iio_device_release_direct_mode(iio_dev); + + return ret; +} + +static int hts221_validate_trigger(struct iio_dev *iio_dev, + struct iio_trigger *trig) +{ + struct hts221_hw *hw = iio_priv(iio_dev); + + return hw->trig == trig ? 0 : -EINVAL; +} + +static IIO_DEVICE_ATTR(in_humidity_oversampling_ratio_available, S_IRUGO, + hts221_sysfs_rh_oversampling_avail, NULL, 0); +static IIO_DEVICE_ATTR(in_temp_oversampling_ratio_available, S_IRUGO, + hts221_sysfs_temp_oversampling_avail, NULL, 0); +static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hts221_sysfs_sampling_freq); + +static struct attribute *hts221_attributes[] = { + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_in_humidity_oversampling_ratio_available.dev_attr.attr, + &iio_dev_attr_in_temp_oversampling_ratio_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group hts221_attribute_group = { + .attrs = hts221_attributes, +}; + +static const struct iio_info hts221_info = { + .attrs = &hts221_attribute_group, + .read_raw = hts221_read_raw, + .write_raw = hts221_write_raw, + .validate_trigger = hts221_validate_trigger, +}; + +static const unsigned long hts221_scan_masks[] = {0x3, 0x0}; + +static int hts221_init_regulators(struct device *dev) +{ + int err; + + err = devm_regulator_get_enable(dev, "vdd"); + if (err) + return dev_err_probe(dev, err, "failed to get vdd regulator\n"); + + msleep(50); + + return 0; +} + +int hts221_probe(struct device *dev, int irq, const char *name, + struct regmap *regmap) +{ + struct iio_dev *iio_dev; + struct hts221_hw *hw; + int err; + u8 data; + + iio_dev = devm_iio_device_alloc(dev, sizeof(*hw)); + if (!iio_dev) + return -ENOMEM; + + dev_set_drvdata(dev, (void *)iio_dev); + + hw = iio_priv(iio_dev); + hw->name = name; + hw->dev = dev; + hw->irq = irq; + hw->regmap = regmap; + + err = hts221_init_regulators(dev); + if (err) + return err; + + err = hts221_check_whoami(hw); + if (err < 0) + return err; + + iio_dev->modes = INDIO_DIRECT_MODE; + iio_dev->available_scan_masks = hts221_scan_masks; + iio_dev->channels = hts221_channels; + iio_dev->num_channels = ARRAY_SIZE(hts221_channels); + iio_dev->name = HTS221_DEV_NAME; + iio_dev->info = &hts221_info; + + /* enable Block Data Update */ + err = regmap_update_bits(hw->regmap, HTS221_REG_CNTRL1_ADDR, + HTS221_BDU_MASK, + FIELD_PREP(HTS221_BDU_MASK, 1)); + if (err < 0) + return err; + + err = hts221_update_odr(hw, hts221_odr_table[0].hz); + if (err < 0) + return err; + + /* configure humidity sensor */ + err = hts221_parse_rh_caldata(hw); + if (err < 0) { + dev_err(hw->dev, "failed to get rh calibration data\n"); + return err; + } + + data = hts221_avg_list[HTS221_SENSOR_H].avg_avl[3]; + err = hts221_update_avg(hw, HTS221_SENSOR_H, data); + if (err < 0) { + dev_err(hw->dev, "failed to set rh oversampling ratio\n"); + return err; + } + + /* configure temperature sensor */ + err = hts221_parse_temp_caldata(hw); + if (err < 0) { + dev_err(hw->dev, + "failed to get temperature calibration data\n"); + return err; + } + + data = hts221_avg_list[HTS221_SENSOR_T].avg_avl[3]; + err = hts221_update_avg(hw, HTS221_SENSOR_T, data); + if (err < 0) { + dev_err(hw->dev, + "failed to set temperature oversampling ratio\n"); + return err; + } + + if (hw->irq > 0) { + err = hts221_allocate_buffers(iio_dev); + if (err < 0) + return err; + + err = hts221_allocate_trigger(iio_dev); + if (err) + return err; + } + + return devm_iio_device_register(hw->dev, iio_dev); +} +EXPORT_SYMBOL_NS(hts221_probe, IIO_HTS221); + +static int hts221_suspend(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hts221_hw *hw = iio_priv(iio_dev); + + return regmap_update_bits(hw->regmap, HTS221_REG_CNTRL1_ADDR, + HTS221_ENABLE_MASK, + FIELD_PREP(HTS221_ENABLE_MASK, false)); +} + +static int hts221_resume(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hts221_hw *hw = iio_priv(iio_dev); + int err = 0; + + if (hw->enabled) + err = regmap_update_bits(hw->regmap, HTS221_REG_CNTRL1_ADDR, + HTS221_ENABLE_MASK, + FIELD_PREP(HTS221_ENABLE_MASK, + true)); + return err; +} + +EXPORT_NS_SIMPLE_DEV_PM_OPS(hts221_pm_ops, hts221_suspend, hts221_resume, + IIO_HTS221); + +MODULE_AUTHOR("Lorenzo Bianconi "); +MODULE_DESCRIPTION("STMicroelectronics hts221 sensor driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3