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/lm95245.c | 610 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 610 insertions(+) create mode 100644 drivers/hwmon/lm95245.c (limited to 'drivers/hwmon/lm95245.c') diff --git a/drivers/hwmon/lm95245.c b/drivers/hwmon/lm95245.c new file mode 100644 index 000000000..c433f0af2 --- /dev/null +++ b/drivers/hwmon/lm95245.c @@ -0,0 +1,610 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2011 Alexander Stein + * + * The LM95245 is a sensor chip made by TI / National Semiconductor. + * It reports up to two temperatures (its own plus an external one). + * + * This driver is based on lm95241.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static const unsigned short normal_i2c[] = { + 0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END }; + +/* LM95245 registers */ +/* general registers */ +#define LM95245_REG_RW_CONFIG1 0x03 +#define LM95245_REG_RW_CONVERS_RATE 0x04 +#define LM95245_REG_W_ONE_SHOT 0x0F + +/* diode configuration */ +#define LM95245_REG_RW_CONFIG2 0xBF +#define LM95245_REG_RW_REMOTE_OFFH 0x11 +#define LM95245_REG_RW_REMOTE_OFFL 0x12 + +/* status registers */ +#define LM95245_REG_R_STATUS1 0x02 +#define LM95245_REG_R_STATUS2 0x33 + +/* limit registers */ +#define LM95245_REG_RW_REMOTE_OS_LIMIT 0x07 +#define LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT 0x20 +#define LM95245_REG_RW_REMOTE_TCRIT_LIMIT 0x19 +#define LM95245_REG_RW_COMMON_HYSTERESIS 0x21 + +/* temperature signed */ +#define LM95245_REG_R_LOCAL_TEMPH_S 0x00 +#define LM95245_REG_R_LOCAL_TEMPL_S 0x30 +#define LM95245_REG_R_REMOTE_TEMPH_S 0x01 +#define LM95245_REG_R_REMOTE_TEMPL_S 0x10 +/* temperature unsigned */ +#define LM95245_REG_R_REMOTE_TEMPH_U 0x31 +#define LM95245_REG_R_REMOTE_TEMPL_U 0x32 + +/* id registers */ +#define LM95245_REG_R_MAN_ID 0xFE +#define LM95245_REG_R_CHIP_ID 0xFF + +/* LM95245 specific bitfields */ +#define CFG_STOP 0x40 +#define CFG_REMOTE_TCRIT_MASK 0x10 +#define CFG_REMOTE_OS_MASK 0x08 +#define CFG_LOCAL_TCRIT_MASK 0x04 +#define CFG_LOCAL_OS_MASK 0x02 + +#define CFG2_OS_A0 0x40 +#define CFG2_DIODE_FAULT_OS 0x20 +#define CFG2_DIODE_FAULT_TCRIT 0x10 +#define CFG2_REMOTE_TT 0x08 +#define CFG2_REMOTE_FILTER_DIS 0x00 +#define CFG2_REMOTE_FILTER_EN 0x06 + +/* conversation rate in ms */ +#define RATE_CR0063 0x00 +#define RATE_CR0364 0x01 +#define RATE_CR1000 0x02 +#define RATE_CR2500 0x03 + +#define STATUS1_ROS 0x10 +#define STATUS1_DIODE_FAULT 0x04 +#define STATUS1_RTCRIT 0x02 +#define STATUS1_LOC 0x01 + +#define MANUFACTURER_ID 0x01 +#define LM95235_REVISION 0xB1 +#define LM95245_REVISION 0xB3 + +/* Client data (each client gets its own) */ +struct lm95245_data { + struct regmap *regmap; + struct mutex update_lock; + int interval; /* in msecs */ +}; + +/* Conversions */ +static int temp_from_reg_unsigned(u8 val_h, u8 val_l) +{ + return val_h * 1000 + val_l * 1000 / 256; +} + +static int temp_from_reg_signed(u8 val_h, u8 val_l) +{ + if (val_h & 0x80) + return (val_h - 0x100) * 1000; + return temp_from_reg_unsigned(val_h, val_l); +} + +static int lm95245_read_conversion_rate(struct lm95245_data *data) +{ + unsigned int rate; + int ret; + + ret = regmap_read(data->regmap, LM95245_REG_RW_CONVERS_RATE, &rate); + if (ret < 0) + return ret; + + switch (rate) { + case RATE_CR0063: + data->interval = 63; + break; + case RATE_CR0364: + data->interval = 364; + break; + case RATE_CR1000: + data->interval = 1000; + break; + case RATE_CR2500: + default: + data->interval = 2500; + break; + } + return 0; +} + +static int lm95245_set_conversion_rate(struct lm95245_data *data, long interval) +{ + int ret, rate; + + if (interval <= 63) { + interval = 63; + rate = RATE_CR0063; + } else if (interval <= 364) { + interval = 364; + rate = RATE_CR0364; + } else if (interval <= 1000) { + interval = 1000; + rate = RATE_CR1000; + } else { + interval = 2500; + rate = RATE_CR2500; + } + + ret = regmap_write(data->regmap, LM95245_REG_RW_CONVERS_RATE, rate); + if (ret < 0) + return ret; + + data->interval = interval; + return 0; +} + +static int lm95245_read_temp(struct device *dev, u32 attr, int channel, + long *val) +{ + struct lm95245_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + int ret, regl, regh, regvall, regvalh; + + switch (attr) { + case hwmon_temp_input: + regl = channel ? LM95245_REG_R_REMOTE_TEMPL_S : + LM95245_REG_R_LOCAL_TEMPL_S; + regh = channel ? LM95245_REG_R_REMOTE_TEMPH_S : + LM95245_REG_R_LOCAL_TEMPH_S; + ret = regmap_read(regmap, regl, ®vall); + if (ret < 0) + return ret; + ret = regmap_read(regmap, regh, ®valh); + if (ret < 0) + return ret; + /* + * Local temp is always signed. + * Remote temp has both signed and unsigned data. + * Use signed calculation for remote if signed bit is set + * or if reported temperature is below signed limit. + */ + if (!channel || (regvalh & 0x80) || regvalh < 0x7f) { + *val = temp_from_reg_signed(regvalh, regvall); + return 0; + } + ret = regmap_read(regmap, LM95245_REG_R_REMOTE_TEMPL_U, + ®vall); + if (ret < 0) + return ret; + ret = regmap_read(regmap, LM95245_REG_R_REMOTE_TEMPH_U, + ®valh); + if (ret < 0) + return ret; + *val = temp_from_reg_unsigned(regvalh, regvall); + return 0; + case hwmon_temp_max: + ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, + ®valh); + if (ret < 0) + return ret; + *val = regvalh * 1000; + return 0; + case hwmon_temp_crit: + regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + ret = regmap_read(regmap, regh, ®valh); + if (ret < 0) + return ret; + *val = regvalh * 1000; + return 0; + case hwmon_temp_max_hyst: + ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, + ®valh); + if (ret < 0) + return ret; + ret = regmap_read(regmap, LM95245_REG_RW_COMMON_HYSTERESIS, + ®vall); + if (ret < 0) + return ret; + *val = (regvalh - regvall) * 1000; + return 0; + case hwmon_temp_crit_hyst: + regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + ret = regmap_read(regmap, regh, ®valh); + if (ret < 0) + return ret; + ret = regmap_read(regmap, LM95245_REG_RW_COMMON_HYSTERESIS, + ®vall); + if (ret < 0) + return ret; + *val = (regvalh - regvall) * 1000; + return 0; + case hwmon_temp_type: + ret = regmap_read(regmap, LM95245_REG_RW_CONFIG2, ®valh); + if (ret < 0) + return ret; + *val = (regvalh & CFG2_REMOTE_TT) ? 1 : 2; + return 0; + case hwmon_temp_offset: + ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OFFL, + ®vall); + if (ret < 0) + return ret; + ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OFFH, + ®valh); + if (ret < 0) + return ret; + *val = temp_from_reg_signed(regvalh, regvall); + return 0; + case hwmon_temp_max_alarm: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®valh); + if (ret < 0) + return ret; + *val = !!(regvalh & STATUS1_ROS); + return 0; + case hwmon_temp_crit_alarm: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®valh); + if (ret < 0) + return ret; + *val = !!(regvalh & (channel ? STATUS1_RTCRIT : STATUS1_LOC)); + return 0; + case hwmon_temp_fault: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®valh); + if (ret < 0) + return ret; + *val = !!(regvalh & STATUS1_DIODE_FAULT); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int lm95245_write_temp(struct device *dev, u32 attr, int channel, + long val) +{ + struct lm95245_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + unsigned int regval; + int ret, reg; + + switch (attr) { + case hwmon_temp_max: + val = clamp_val(val / 1000, 0, 255); + ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, val); + return ret; + case hwmon_temp_crit: + reg = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + val = clamp_val(val / 1000, 0, channel ? 255 : 127); + ret = regmap_write(regmap, reg, val); + return ret; + case hwmon_temp_crit_hyst: + mutex_lock(&data->update_lock); + ret = regmap_read(regmap, LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT, + ®val); + if (ret < 0) { + mutex_unlock(&data->update_lock); + return ret; + } + /* Clamp to reasonable range to prevent overflow */ + val = clamp_val(val, -1000000, 1000000); + val = regval - val / 1000; + val = clamp_val(val, 0, 31); + ret = regmap_write(regmap, LM95245_REG_RW_COMMON_HYSTERESIS, + val); + mutex_unlock(&data->update_lock); + return ret; + case hwmon_temp_offset: + val = clamp_val(val, -128000, 127875); + val = val * 256 / 1000; + mutex_lock(&data->update_lock); + ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OFFL, + val & 0xe0); + if (ret < 0) { + mutex_unlock(&data->update_lock); + return ret; + } + ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OFFH, + (val >> 8) & 0xff); + mutex_unlock(&data->update_lock); + return ret; + case hwmon_temp_type: + if (val != 1 && val != 2) + return -EINVAL; + ret = regmap_update_bits(regmap, LM95245_REG_RW_CONFIG2, + CFG2_REMOTE_TT, + val == 1 ? CFG2_REMOTE_TT : 0); + return ret; + default: + return -EOPNOTSUPP; + } +} + +static int lm95245_read_chip(struct device *dev, u32 attr, int channel, + long *val) +{ + struct lm95245_data *data = dev_get_drvdata(dev); + + switch (attr) { + case hwmon_chip_update_interval: + *val = data->interval; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int lm95245_write_chip(struct device *dev, u32 attr, int channel, + long val) +{ + struct lm95245_data *data = dev_get_drvdata(dev); + int ret; + + switch (attr) { + case hwmon_chip_update_interval: + mutex_lock(&data->update_lock); + ret = lm95245_set_conversion_rate(data, val); + mutex_unlock(&data->update_lock); + return ret; + default: + return -EOPNOTSUPP; + } +} + +static int lm95245_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + switch (type) { + case hwmon_chip: + return lm95245_read_chip(dev, attr, channel, val); + case hwmon_temp: + return lm95245_read_temp(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static int lm95245_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + switch (type) { + case hwmon_chip: + return lm95245_write_chip(dev, attr, channel, val); + case hwmon_temp: + return lm95245_write_temp(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static umode_t lm95245_temp_is_visible(const void *data, u32 attr, int channel) +{ + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_max_alarm: + case hwmon_temp_max_hyst: + case hwmon_temp_crit_alarm: + case hwmon_temp_fault: + return 0444; + case hwmon_temp_type: + case hwmon_temp_max: + case hwmon_temp_crit: + case hwmon_temp_offset: + return 0644; + case hwmon_temp_crit_hyst: + return (channel == 0) ? 0644 : 0444; + default: + return 0; + } +} + +static umode_t lm95245_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_chip: + switch (attr) { + case hwmon_chip_update_interval: + return 0644; + default: + return 0; + } + case hwmon_temp: + return lm95245_temp_is_visible(data, attr, channel); + default: + return 0; + } +} + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm95245_detect(struct i2c_client *new_client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = new_client->adapter; + int address = new_client->addr; + const char *name; + int rev, id; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + id = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID); + if (id != MANUFACTURER_ID) + return -ENODEV; + + rev = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID); + switch (rev) { + case LM95235_REVISION: + if (address != 0x18 && address != 0x29 && address != 0x4c) + return -ENODEV; + name = "lm95235"; + break; + case LM95245_REVISION: + name = "lm95245"; + break; + default: + return -ENODEV; + } + + strscpy(info->type, name, I2C_NAME_SIZE); + return 0; +} + +static int lm95245_init_client(struct lm95245_data *data) +{ + int ret; + + ret = lm95245_read_conversion_rate(data); + if (ret < 0) + return ret; + + return regmap_update_bits(data->regmap, LM95245_REG_RW_CONFIG1, + CFG_STOP, 0); +} + +static bool lm95245_is_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LM95245_REG_RW_CONFIG1: + case LM95245_REG_RW_CONVERS_RATE: + case LM95245_REG_W_ONE_SHOT: + case LM95245_REG_RW_CONFIG2: + case LM95245_REG_RW_REMOTE_OFFH: + case LM95245_REG_RW_REMOTE_OFFL: + case LM95245_REG_RW_REMOTE_OS_LIMIT: + case LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT: + case LM95245_REG_RW_REMOTE_TCRIT_LIMIT: + case LM95245_REG_RW_COMMON_HYSTERESIS: + return true; + default: + return false; + } +} + +static bool lm95245_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LM95245_REG_R_STATUS1: + case LM95245_REG_R_STATUS2: + case LM95245_REG_R_LOCAL_TEMPH_S: + case LM95245_REG_R_LOCAL_TEMPL_S: + case LM95245_REG_R_REMOTE_TEMPH_S: + case LM95245_REG_R_REMOTE_TEMPL_S: + case LM95245_REG_R_REMOTE_TEMPH_U: + case LM95245_REG_R_REMOTE_TEMPL_U: + return true; + default: + return false; + } +} + +static const struct regmap_config lm95245_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .writeable_reg = lm95245_is_writeable_reg, + .volatile_reg = lm95245_is_volatile_reg, + .cache_type = REGCACHE_RBTREE, + .use_single_read = true, + .use_single_write = true, +}; + +static const struct hwmon_channel_info *lm95245_info[] = { + HWMON_CHANNEL_INFO(chip, + HWMON_C_UPDATE_INTERVAL), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_CRIT_HYST | + HWMON_T_CRIT_ALARM, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | + HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_FAULT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | + HWMON_T_TYPE | HWMON_T_OFFSET), + NULL +}; + +static const struct hwmon_ops lm95245_hwmon_ops = { + .is_visible = lm95245_is_visible, + .read = lm95245_read, + .write = lm95245_write, +}; + +static const struct hwmon_chip_info lm95245_chip_info = { + .ops = &lm95245_hwmon_ops, + .info = lm95245_info, +}; + +static int lm95245_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct lm95245_data *data; + struct device *hwmon_dev; + int ret; + + data = devm_kzalloc(dev, sizeof(struct lm95245_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->regmap = devm_regmap_init_i2c(client, &lm95245_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + mutex_init(&data->update_lock); + + /* Initialize the LM95245 chip */ + ret = lm95245_init_client(data); + if (ret < 0) + return ret; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, + &lm95245_chip_info, + NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +/* Driver data (common to all clients) */ +static const struct i2c_device_id lm95245_id[] = { + { "lm95235", 0 }, + { "lm95245", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm95245_id); + +static const struct of_device_id __maybe_unused lm95245_of_match[] = { + { .compatible = "national,lm95235" }, + { .compatible = "national,lm95245" }, + { }, +}; +MODULE_DEVICE_TABLE(of, lm95245_of_match); + +static struct i2c_driver lm95245_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm95245", + .of_match_table = of_match_ptr(lm95245_of_match), + }, + .probe_new = lm95245_probe, + .id_table = lm95245_id, + .detect = lm95245_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(lm95245_driver); + +MODULE_AUTHOR("Alexander Stein "); +MODULE_DESCRIPTION("LM95235/LM95245 sensor driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3