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/max1668.c | 448 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 448 insertions(+) create mode 100644 drivers/hwmon/max1668.c (limited to 'drivers/hwmon/max1668.c') diff --git a/drivers/hwmon/max1668.c b/drivers/hwmon/max1668.c new file mode 100644 index 000000000..9f748973d --- /dev/null +++ b/drivers/hwmon/max1668.c @@ -0,0 +1,448 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2011 David George + * + * based on adm1021.c + * some credit to Christoph Scheurer, but largely a rewrite + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Addresses to scan */ +static const unsigned short max1668_addr_list[] = { + 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; + +/* max1668 registers */ + +#define MAX1668_REG_TEMP(nr) (nr) +#define MAX1668_REG_STAT1 0x05 +#define MAX1668_REG_STAT2 0x06 +#define MAX1668_REG_MAN_ID 0xfe +#define MAX1668_REG_DEV_ID 0xff + +/* limits */ + +/* write high limits */ +#define MAX1668_REG_LIMH_WR(nr) (0x13 + 2 * (nr)) +/* write low limits */ +#define MAX1668_REG_LIML_WR(nr) (0x14 + 2 * (nr)) +/* read high limits */ +#define MAX1668_REG_LIMH_RD(nr) (0x08 + 2 * (nr)) +/* read low limits */ +#define MAX1668_REG_LIML_RD(nr) (0x09 + 2 * (nr)) + +/* manufacturer and device ID Constants */ +#define MAN_ID_MAXIM 0x4d +#define DEV_ID_MAX1668 0x3 +#define DEV_ID_MAX1805 0x5 +#define DEV_ID_MAX1989 0xb + +/* read only mode module parameter */ +static bool read_only; +module_param(read_only, bool, 0); +MODULE_PARM_DESC(read_only, "Don't set any values, read only mode"); + +enum chips { max1668, max1805, max1989 }; + +struct max1668_data { + struct i2c_client *client; + const struct attribute_group *groups[3]; + enum chips type; + + struct mutex update_lock; + bool valid; /* true if following fields are valid */ + unsigned long last_updated; /* In jiffies */ + + /* 1x local and 4x remote */ + s8 temp_max[5]; + s8 temp_min[5]; + s8 temp[5]; + u16 alarms; +}; + +static struct max1668_data *max1668_update_device(struct device *dev) +{ + struct max1668_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + struct max1668_data *ret = data; + s32 val; + int i; + + mutex_lock(&data->update_lock); + + if (data->valid && !time_after(jiffies, + data->last_updated + HZ + HZ / 2)) + goto abort; + + for (i = 0; i < 5; i++) { + val = i2c_smbus_read_byte_data(client, MAX1668_REG_TEMP(i)); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->temp[i] = (s8) val; + + val = i2c_smbus_read_byte_data(client, MAX1668_REG_LIMH_RD(i)); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->temp_max[i] = (s8) val; + + val = i2c_smbus_read_byte_data(client, MAX1668_REG_LIML_RD(i)); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->temp_min[i] = (s8) val; + } + + val = i2c_smbus_read_byte_data(client, MAX1668_REG_STAT1); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->alarms = val << 8; + + val = i2c_smbus_read_byte_data(client, MAX1668_REG_STAT2); + if (unlikely(val < 0)) { + ret = ERR_PTR(val); + goto abort; + } + data->alarms |= val; + + data->last_updated = jiffies; + data->valid = true; +abort: + mutex_unlock(&data->update_lock); + + return ret; +} + +static ssize_t show_temp(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = max1668_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", data->temp[index] * 1000); +} + +static ssize_t show_temp_max(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = max1668_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", data->temp_max[index] * 1000); +} + +static ssize_t show_temp_min(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = max1668_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", data->temp_min[index] * 1000); +} + +static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int index = to_sensor_dev_attr(attr)->index; + struct max1668_data *data = max1668_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); +} + +static ssize_t show_fault(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = max1668_update_device(dev); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%u\n", + (data->alarms & (1 << 12)) && data->temp[index] == 127); +} + +static ssize_t set_temp_max(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + long temp; + int ret; + + ret = kstrtol(buf, 10, &temp); + if (ret < 0) + return ret; + + mutex_lock(&data->update_lock); + data->temp_max[index] = clamp_val(temp/1000, -128, 127); + ret = i2c_smbus_write_byte_data(client, + MAX1668_REG_LIMH_WR(index), + data->temp_max[index]); + if (ret < 0) + count = ret; + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t set_temp_min(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct max1668_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + long temp; + int ret; + + ret = kstrtol(buf, 10, &temp); + if (ret < 0) + return ret; + + mutex_lock(&data->update_lock); + data->temp_min[index] = clamp_val(temp/1000, -128, 127); + ret = i2c_smbus_write_byte_data(client, + MAX1668_REG_LIML_WR(index), + data->temp_min[index]); + if (ret < 0) + count = ret; + mutex_unlock(&data->update_lock); + + return count; +} + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); +static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, + set_temp_max, 0); +static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, + set_temp_min, 0); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, + set_temp_max, 1); +static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, + set_temp_min, 1); +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); +static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, + set_temp_max, 2); +static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, + set_temp_min, 2); +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); +static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, + set_temp_max, 3); +static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, + set_temp_min, 3); +static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); +static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, + set_temp_max, 4); +static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, + set_temp_min, 4); + +static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 14); +static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 13); +static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 7); +static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 5); +static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 0); + +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_fault, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_fault, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_fault, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_fault, NULL, 4); + +/* Attributes common to MAX1668, MAX1989 and MAX1805 */ +static struct attribute *max1668_attribute_common[] = { + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, + + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + NULL +}; + +/* Attributes not present on MAX1805 */ +static struct attribute *max1668_attribute_unique[] = { + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp4_min.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp5_max.dev_attr.attr, + &sensor_dev_attr_temp5_min.dev_attr.attr, + &sensor_dev_attr_temp5_input.dev_attr.attr, + + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, + + &sensor_dev_attr_temp4_fault.dev_attr.attr, + &sensor_dev_attr_temp5_fault.dev_attr.attr, + NULL +}; + +static umode_t max1668_attribute_mode(struct kobject *kobj, + struct attribute *attr, int index) +{ + umode_t ret = S_IRUGO; + if (read_only) + return ret; + if (attr == &sensor_dev_attr_temp1_max.dev_attr.attr || + attr == &sensor_dev_attr_temp2_max.dev_attr.attr || + attr == &sensor_dev_attr_temp3_max.dev_attr.attr || + attr == &sensor_dev_attr_temp4_max.dev_attr.attr || + attr == &sensor_dev_attr_temp5_max.dev_attr.attr || + attr == &sensor_dev_attr_temp1_min.dev_attr.attr || + attr == &sensor_dev_attr_temp2_min.dev_attr.attr || + attr == &sensor_dev_attr_temp3_min.dev_attr.attr || + attr == &sensor_dev_attr_temp4_min.dev_attr.attr || + attr == &sensor_dev_attr_temp5_min.dev_attr.attr) + ret |= S_IWUSR; + return ret; +} + +static const struct attribute_group max1668_group_common = { + .attrs = max1668_attribute_common, + .is_visible = max1668_attribute_mode +}; + +static const struct attribute_group max1668_group_unique = { + .attrs = max1668_attribute_unique, + .is_visible = max1668_attribute_mode +}; + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int max1668_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + const char *type_name; + int man_id, dev_id; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + /* Check for unsupported part */ + man_id = i2c_smbus_read_byte_data(client, MAX1668_REG_MAN_ID); + if (man_id != MAN_ID_MAXIM) + return -ENODEV; + + dev_id = i2c_smbus_read_byte_data(client, MAX1668_REG_DEV_ID); + if (dev_id < 0) + return -ENODEV; + + type_name = NULL; + if (dev_id == DEV_ID_MAX1668) + type_name = "max1668"; + else if (dev_id == DEV_ID_MAX1805) + type_name = "max1805"; + else if (dev_id == DEV_ID_MAX1989) + type_name = "max1989"; + + if (!type_name) + return -ENODEV; + + strscpy(info->type, type_name, I2C_NAME_SIZE); + + return 0; +} + +static const struct i2c_device_id max1668_id[]; + +static int max1668_probe(struct i2c_client *client) +{ + struct i2c_adapter *adapter = client->adapter; + struct device *dev = &client->dev; + struct device *hwmon_dev; + struct max1668_data *data; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + data = devm_kzalloc(dev, sizeof(struct max1668_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + data->type = i2c_match_id(max1668_id, client)->driver_data; + mutex_init(&data->update_lock); + + /* sysfs hooks */ + data->groups[0] = &max1668_group_common; + if (data->type == max1668 || data->type == max1989) + data->groups[1] = &max1668_group_unique; + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, data->groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static const struct i2c_device_id max1668_id[] = { + { "max1668", max1668 }, + { "max1805", max1805 }, + { "max1989", max1989 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max1668_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver max1668_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "max1668", + }, + .probe_new = max1668_probe, + .id_table = max1668_id, + .detect = max1668_detect, + .address_list = max1668_addr_list, +}; + +module_i2c_driver(max1668_driver); + +MODULE_AUTHOR("David George "); +MODULE_DESCRIPTION("MAX1668 remote temperature sensor driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3