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/hwmon/lm95234.c | 733 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 733 insertions(+) create mode 100644 drivers/hwmon/lm95234.c (limited to 'drivers/hwmon/lm95234.c') diff --git a/drivers/hwmon/lm95234.c b/drivers/hwmon/lm95234.c new file mode 100644 index 000000000..b4a9d0c22 --- /dev/null +++ b/drivers/hwmon/lm95234.c @@ -0,0 +1,733 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for Texas Instruments / National Semiconductor LM95234 + * + * Copyright (c) 2013, 2014 Guenter Roeck + * + * Derived from lm95241.c + * Copyright (C) 2008, 2010 Davide Rizzo + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRVNAME "lm95234" + +enum chips { lm95233, lm95234 }; + +static const unsigned short normal_i2c[] = { + 0x18, 0x2a, 0x2b, 0x4d, 0x4e, I2C_CLIENT_END }; + +/* LM95234 registers */ +#define LM95234_REG_MAN_ID 0xFE +#define LM95234_REG_CHIP_ID 0xFF +#define LM95234_REG_STATUS 0x02 +#define LM95234_REG_CONFIG 0x03 +#define LM95234_REG_CONVRATE 0x04 +#define LM95234_REG_STS_FAULT 0x07 +#define LM95234_REG_STS_TCRIT1 0x08 +#define LM95234_REG_STS_TCRIT2 0x09 +#define LM95234_REG_TEMPH(x) ((x) + 0x10) +#define LM95234_REG_TEMPL(x) ((x) + 0x20) +#define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ +#define LM95234_REG_UTEMPL(x) ((x) + 0x29) +#define LM95234_REG_REM_MODEL 0x30 +#define LM95234_REG_REM_MODEL_STS 0x38 +#define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ +#define LM95234_REG_TCRIT1(x) ((x) + 0x40) +#define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ +#define LM95234_REG_TCRIT_HYST 0x5a + +#define NATSEMI_MAN_ID 0x01 +#define LM95233_CHIP_ID 0x89 +#define LM95234_CHIP_ID 0x79 + +/* Client data (each client gets its own) */ +struct lm95234_data { + struct i2c_client *client; + const struct attribute_group *groups[3]; + struct mutex update_lock; + unsigned long last_updated, interval; /* in jiffies */ + bool valid; /* false until following fields are valid */ + /* registers values */ + int temp[5]; /* temperature (signed) */ + u32 status; /* fault/alarm status */ + u8 tcrit1[5]; /* critical temperature limit */ + u8 tcrit2[2]; /* high temperature limit */ + s8 toffset[4]; /* remote temperature offset */ + u8 thyst; /* common hysteresis */ + + u8 sensor_type; /* temperature sensor type */ +}; + +static int lm95234_read_temp(struct i2c_client *client, int index, int *t) +{ + int val; + u16 temp = 0; + + if (index) { + val = i2c_smbus_read_byte_data(client, + LM95234_REG_UTEMPH(index - 1)); + if (val < 0) + return val; + temp = val << 8; + val = i2c_smbus_read_byte_data(client, + LM95234_REG_UTEMPL(index - 1)); + if (val < 0) + return val; + temp |= val; + *t = temp; + } + /* + * Read signed temperature if unsigned temperature is 0, + * or if this is the local sensor. + */ + if (!temp) { + val = i2c_smbus_read_byte_data(client, + LM95234_REG_TEMPH(index)); + if (val < 0) + return val; + temp = val << 8; + val = i2c_smbus_read_byte_data(client, + LM95234_REG_TEMPL(index)); + if (val < 0) + return val; + temp |= val; + *t = (s16)temp; + } + return 0; +} + +static u16 update_intervals[] = { 143, 364, 1000, 2500 }; + +/* Fill value cache. Must be called with update lock held. */ + +static int lm95234_fill_cache(struct lm95234_data *data, + struct i2c_client *client) +{ + int i, ret; + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); + if (ret < 0) + return ret; + + data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); + + for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { + ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); + if (ret < 0) + return ret; + data->tcrit1[i] = ret; + } + for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { + ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); + if (ret < 0) + return ret; + data->tcrit2[i] = ret; + } + for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { + ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); + if (ret < 0) + return ret; + data->toffset[i] = ret; + } + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); + if (ret < 0) + return ret; + data->thyst = ret; + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); + if (ret < 0) + return ret; + data->sensor_type = ret; + + return 0; +} + +static int lm95234_update_device(struct lm95234_data *data) +{ + struct i2c_client *client = data->client; + int ret; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + data->interval) || + !data->valid) { + int i; + + if (!data->valid) { + ret = lm95234_fill_cache(data, client); + if (ret < 0) + goto abort; + } + + data->valid = false; + for (i = 0; i < ARRAY_SIZE(data->temp); i++) { + ret = lm95234_read_temp(client, i, &data->temp[i]); + if (ret < 0) + goto abort; + } + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); + if (ret < 0) + goto abort; + data->status = ret; + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); + if (ret < 0) + goto abort; + data->status |= ret << 8; + + ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); + if (ret < 0) + goto abort; + data->status |= ret << 16; + + data->last_updated = jiffies; + data->valid = true; + } + ret = 0; +abort: + mutex_unlock(&data->update_lock); + + return ret; +} + +static ssize_t temp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, "%d\n", + DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); +} + +static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + u32 mask = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, "%u", !!(data->status & mask)); +} + +static ssize_t type_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + u8 mask = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); +} + +static ssize_t type_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + unsigned long val; + u8 mask = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + ret = kstrtoul(buf, 10, &val); + if (ret < 0) + return ret; + + if (val != 1 && val != 2) + return -EINVAL; + + mutex_lock(&data->update_lock); + if (val == 1) + data->sensor_type |= mask; + else + data->sensor_type &= ~mask; + data->valid = false; + i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, + data->sensor_type); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t tcrit2_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, "%u", data->tcrit2[index] * 1000); +} + +static ssize_t tcrit2_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + long val; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + ret = kstrtol(buf, 10, &val); + if (ret < 0) + return ret; + + val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); + + mutex_lock(&data->update_lock); + data->tcrit2[index] = val; + i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t tcrit2_hyst_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + /* Result can be negative, so be careful with unsigned operands */ + return sprintf(buf, "%d", + ((int)data->tcrit2[index] - (int)data->thyst) * 1000); +} + +static ssize_t tcrit1_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + + return sprintf(buf, "%u", data->tcrit1[index] * 1000); +} + +static ssize_t tcrit1_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + long val; + + if (ret) + return ret; + + ret = kstrtol(buf, 10, &val); + if (ret < 0) + return ret; + + val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); + + mutex_lock(&data->update_lock); + data->tcrit1[index] = val; + i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t tcrit1_hyst_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + /* Result can be negative, so be careful with unsigned operands */ + return sprintf(buf, "%d", + ((int)data->tcrit1[index] - (int)data->thyst) * 1000); +} + +static ssize_t tcrit1_hyst_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + long val; + + if (ret) + return ret; + + ret = kstrtol(buf, 10, &val); + if (ret < 0) + return ret; + + val = DIV_ROUND_CLOSEST(val, 1000); + val = clamp_val((int)data->tcrit1[index] - val, 0, 31); + + mutex_lock(&data->update_lock); + data->thyst = val; + i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t offset_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, "%d", data->toffset[index] * 500); +} + +static ssize_t offset_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int index = to_sensor_dev_attr(attr)->index; + int ret = lm95234_update_device(data); + long val; + + if (ret) + return ret; + + ret = kstrtol(buf, 10, &val); + if (ret < 0) + return ret; + + /* Accuracy is 1/2 degrees C */ + val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); + + mutex_lock(&data->update_lock); + data->toffset[index] = val; + i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t update_interval_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int ret = lm95234_update_device(data); + + if (ret) + return ret; + + return sprintf(buf, "%lu\n", + DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); +} + +static ssize_t update_interval_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct lm95234_data *data = dev_get_drvdata(dev); + int ret = lm95234_update_device(data); + unsigned long val; + u8 regval; + + if (ret) + return ret; + + ret = kstrtoul(buf, 10, &val); + if (ret < 0) + return ret; + + for (regval = 0; regval < 3; regval++) { + if (val <= update_intervals[regval]) + break; + } + + mutex_lock(&data->update_lock); + data->interval = msecs_to_jiffies(update_intervals[regval]); + i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); + mutex_unlock(&data->update_lock); + + return count; +} + +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); +static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); +static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); + +static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, BIT(0) | BIT(1)); +static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, BIT(2) | BIT(3)); +static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, BIT(4) | BIT(5)); +static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, BIT(6) | BIT(7)); + +static SENSOR_DEVICE_ATTR_RW(temp2_type, type, BIT(1)); +static SENSOR_DEVICE_ATTR_RW(temp3_type, type, BIT(2)); +static SENSOR_DEVICE_ATTR_RW(temp4_type, type, BIT(3)); +static SENSOR_DEVICE_ATTR_RW(temp5_type, type, BIT(4)); + +static SENSOR_DEVICE_ATTR_RW(temp1_max, tcrit1, 0); +static SENSOR_DEVICE_ATTR_RW(temp2_max, tcrit2, 0); +static SENSOR_DEVICE_ATTR_RW(temp3_max, tcrit2, 1); +static SENSOR_DEVICE_ATTR_RW(temp4_max, tcrit1, 3); +static SENSOR_DEVICE_ATTR_RW(temp5_max, tcrit1, 4); + +static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, tcrit1_hyst, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, tcrit2_hyst, 0); +static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, tcrit2_hyst, 1); +static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, tcrit1_hyst, 3); +static SENSOR_DEVICE_ATTR_RO(temp5_max_hyst, tcrit1_hyst, 4); + +static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, BIT(0 + 8)); +static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, BIT(1 + 16)); +static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, BIT(2 + 16)); +static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, BIT(3 + 8)); +static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, BIT(4 + 8)); + +static SENSOR_DEVICE_ATTR_RW(temp2_crit, tcrit1, 1); +static SENSOR_DEVICE_ATTR_RW(temp3_crit, tcrit1, 2); + +static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, tcrit1_hyst, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, tcrit1_hyst, 2); + +static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, BIT(1 + 8)); +static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, BIT(2 + 8)); + +static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 0); +static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 1); +static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 2); +static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 3); + +static DEVICE_ATTR_RW(update_interval); + +static struct attribute *lm95234_common_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + &sensor_dev_attr_temp2_type.dev_attr.attr, + &sensor_dev_attr_temp3_type.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp3_crit.dev_attr.attr, + &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_offset.dev_attr.attr, + &sensor_dev_attr_temp3_offset.dev_attr.attr, + &dev_attr_update_interval.attr, + NULL +}; + +static const struct attribute_group lm95234_common_group = { + .attrs = lm95234_common_attrs, +}; + +static struct attribute *lm95234_attrs[] = { + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp5_input.dev_attr.attr, + &sensor_dev_attr_temp4_fault.dev_attr.attr, + &sensor_dev_attr_temp5_fault.dev_attr.attr, + &sensor_dev_attr_temp4_type.dev_attr.attr, + &sensor_dev_attr_temp5_type.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp5_max.dev_attr.attr, + &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_offset.dev_attr.attr, + &sensor_dev_attr_temp5_offset.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm95234_group = { + .attrs = lm95234_attrs, +}; + +static int lm95234_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + int address = client->addr; + u8 config_mask, model_mask; + int mfg_id, chip_id, val; + const char *name; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); + if (mfg_id != NATSEMI_MAN_ID) + return -ENODEV; + + chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); + switch (chip_id) { + case LM95233_CHIP_ID: + if (address != 0x18 && address != 0x2a && address != 0x2b) + return -ENODEV; + config_mask = 0xbf; + model_mask = 0xf9; + name = "lm95233"; + break; + case LM95234_CHIP_ID: + if (address != 0x18 && address != 0x4d && address != 0x4e) + return -ENODEV; + config_mask = 0xbc; + model_mask = 0xe1; + name = "lm95234"; + break; + default: + return -ENODEV; + } + + val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); + if (val & 0x30) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); + if (val & config_mask) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); + if (val & 0xfc) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); + if (val & model_mask) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); + if (val & model_mask) + return -ENODEV; + + strscpy(info->type, name, I2C_NAME_SIZE); + return 0; +} + +static int lm95234_init_client(struct i2c_client *client) +{ + int val, model; + + /* start conversion if necessary */ + val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); + if (val < 0) + return val; + if (val & 0x40) + i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, + val & ~0x40); + + /* If diode type status reports an error, try to fix it */ + val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); + if (val < 0) + return val; + model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); + if (model < 0) + return model; + if (model & val) { + dev_notice(&client->dev, + "Fixing remote diode type misconfiguration (0x%x)\n", + val); + i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, + model & ~val); + } + return 0; +} + +static const struct i2c_device_id lm95234_id[]; + +static int lm95234_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct lm95234_data *data; + struct device *hwmon_dev; + int err; + + data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + mutex_init(&data->update_lock); + + /* Initialize the LM95234 chip */ + err = lm95234_init_client(client); + if (err < 0) + return err; + + data->groups[0] = &lm95234_common_group; + if (i2c_match_id(lm95234_id, client)->driver_data == lm95234) + data->groups[1] = &lm95234_group; + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, data->groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +/* Driver data (common to all clients) */ +static const struct i2c_device_id lm95234_id[] = { + { "lm95233", lm95233 }, + { "lm95234", lm95234 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm95234_id); + +static struct i2c_driver lm95234_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = DRVNAME, + }, + .probe_new = lm95234_probe, + .id_table = lm95234_id, + .detect = lm95234_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(lm95234_driver); + +MODULE_AUTHOR("Guenter Roeck "); +MODULE_DESCRIPTION("LM95233/LM95234 sensor driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3