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/max6639.c | 637 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 637 insertions(+) create mode 100644 drivers/hwmon/max6639.c (limited to 'drivers/hwmon/max6639.c') diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c new file mode 100644 index 000000000..9b895402c --- /dev/null +++ b/drivers/hwmon/max6639.c @@ -0,0 +1,637 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * max6639.c - Support for Maxim MAX6639 + * + * 2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller + * + * Copyright (C) 2010, 2011 Roland Stigge + * + * based on the initial MAX6639 support from semptian.net + * by He Changqing + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Addresses to scan */ +static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; + +/* The MAX6639 registers, valid channel numbers: 0, 1 */ +#define MAX6639_REG_TEMP(ch) (0x00 + (ch)) +#define MAX6639_REG_STATUS 0x02 +#define MAX6639_REG_OUTPUT_MASK 0x03 +#define MAX6639_REG_GCONFIG 0x04 +#define MAX6639_REG_TEMP_EXT(ch) (0x05 + (ch)) +#define MAX6639_REG_ALERT_LIMIT(ch) (0x08 + (ch)) +#define MAX6639_REG_OT_LIMIT(ch) (0x0A + (ch)) +#define MAX6639_REG_THERM_LIMIT(ch) (0x0C + (ch)) +#define MAX6639_REG_FAN_CONFIG1(ch) (0x10 + (ch) * 4) +#define MAX6639_REG_FAN_CONFIG2a(ch) (0x11 + (ch) * 4) +#define MAX6639_REG_FAN_CONFIG2b(ch) (0x12 + (ch) * 4) +#define MAX6639_REG_FAN_CONFIG3(ch) (0x13 + (ch) * 4) +#define MAX6639_REG_FAN_CNT(ch) (0x20 + (ch)) +#define MAX6639_REG_TARGET_CNT(ch) (0x22 + (ch)) +#define MAX6639_REG_FAN_PPR(ch) (0x24 + (ch)) +#define MAX6639_REG_TARGTDUTY(ch) (0x26 + (ch)) +#define MAX6639_REG_FAN_START_TEMP(ch) (0x28 + (ch)) +#define MAX6639_REG_DEVID 0x3D +#define MAX6639_REG_MANUID 0x3E +#define MAX6639_REG_DEVREV 0x3F + +/* Register bits */ +#define MAX6639_GCONFIG_STANDBY 0x80 +#define MAX6639_GCONFIG_POR 0x40 +#define MAX6639_GCONFIG_DISABLE_TIMEOUT 0x20 +#define MAX6639_GCONFIG_CH2_LOCAL 0x10 +#define MAX6639_GCONFIG_PWM_FREQ_HI 0x08 + +#define MAX6639_FAN_CONFIG1_PWM 0x80 + +#define MAX6639_FAN_CONFIG3_THERM_FULL_SPEED 0x40 + +static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 }; + +#define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \ + 0 : (rpm_ranges[rpm_range] * 30) / (val)) +#define TEMP_LIMIT_TO_REG(val) clamp_val((val) / 1000, 0, 255) + +/* + * Client data (each client gets its own) + */ +struct max6639_data { + struct i2c_client *client; + struct mutex update_lock; + bool valid; /* true if following fields are valid */ + unsigned long last_updated; /* In jiffies */ + + /* Register values sampled regularly */ + u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */ + bool temp_fault[2]; /* Detected temperature diode failure */ + u8 fan[2]; /* Register value: TACH count for fans >=30 */ + u8 status; /* Detected channel alarms and fan failures */ + + /* Register values only written to */ + u8 pwm[2]; /* Register value: Duty cycle 0..120 */ + u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */ + u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */ + u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */ + + /* Register values initialized only once */ + u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */ + u8 rpm_range; /* Index in above rpm_ranges table */ + + /* Optional regulator for FAN supply */ + struct regulator *reg; +}; + +static struct max6639_data *max6639_update_device(struct device *dev) +{ + struct max6639_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + struct max6639_data *ret = data; + int i; + int status_reg; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { + int res; + + dev_dbg(&client->dev, "Starting max6639 update\n"); + + status_reg = i2c_smbus_read_byte_data(client, + MAX6639_REG_STATUS); + if (status_reg < 0) { + ret = ERR_PTR(status_reg); + goto abort; + } + + data->status = status_reg; + + for (i = 0; i < 2; i++) { + res = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CNT(i)); + if (res < 0) { + ret = ERR_PTR(res); + goto abort; + } + data->fan[i] = res; + + res = i2c_smbus_read_byte_data(client, + MAX6639_REG_TEMP_EXT(i)); + if (res < 0) { + ret = ERR_PTR(res); + goto abort; + } + data->temp[i] = res >> 5; + data->temp_fault[i] = res & 0x01; + + res = i2c_smbus_read_byte_data(client, + MAX6639_REG_TEMP(i)); + if (res < 0) { + ret = ERR_PTR(res); + goto abort; + } + data->temp[i] |= res << 3; + } + + data->last_updated = jiffies; + data->valid = true; + } +abort: + mutex_unlock(&data->update_lock); + + return ret; +} + +static ssize_t temp_input_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + long temp; + struct max6639_data *data = max6639_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + + if (IS_ERR(data)) + return PTR_ERR(data); + + temp = data->temp[attr->index] * 125; + return sprintf(buf, "%ld\n", temp); +} + +static ssize_t temp_fault_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + struct max6639_data *data = max6639_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", data->temp_fault[attr->index]); +} + +static ssize_t temp_max_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", (data->temp_therm[attr->index] * 1000)); +} + +static ssize_t temp_max_store(struct device *dev, + struct device_attribute *dev_attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + unsigned long val; + int res; + + res = kstrtoul(buf, 10, &val); + if (res) + return res; + + mutex_lock(&data->update_lock); + data->temp_therm[attr->index] = TEMP_LIMIT_TO_REG(val); + i2c_smbus_write_byte_data(client, + MAX6639_REG_THERM_LIMIT(attr->index), + data->temp_therm[attr->index]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t temp_crit_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", (data->temp_alert[attr->index] * 1000)); +} + +static ssize_t temp_crit_store(struct device *dev, + struct device_attribute *dev_attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + unsigned long val; + int res; + + res = kstrtoul(buf, 10, &val); + if (res) + return res; + + mutex_lock(&data->update_lock); + data->temp_alert[attr->index] = TEMP_LIMIT_TO_REG(val); + i2c_smbus_write_byte_data(client, + MAX6639_REG_ALERT_LIMIT(attr->index), + data->temp_alert[attr->index]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t temp_emergency_show(struct device *dev, + struct device_attribute *dev_attr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", (data->temp_ot[attr->index] * 1000)); +} + +static ssize_t temp_emergency_store(struct device *dev, + struct device_attribute *dev_attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + unsigned long val; + int res; + + res = kstrtoul(buf, 10, &val); + if (res) + return res; + + mutex_lock(&data->update_lock); + data->temp_ot[attr->index] = TEMP_LIMIT_TO_REG(val); + i2c_smbus_write_byte_data(client, + MAX6639_REG_OT_LIMIT(attr->index), + data->temp_ot[attr->index]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t pwm_show(struct device *dev, struct device_attribute *dev_attr, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120); +} + +static ssize_t pwm_store(struct device *dev, + struct device_attribute *dev_attr, const char *buf, + size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + struct max6639_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + unsigned long val; + int res; + + res = kstrtoul(buf, 10, &val); + if (res) + return res; + + val = clamp_val(val, 0, 255); + + mutex_lock(&data->update_lock); + data->pwm[attr->index] = (u8)(val * 120 / 255); + i2c_smbus_write_byte_data(client, + MAX6639_REG_TARGTDUTY(attr->index), + data->pwm[attr->index]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t fan_input_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + struct max6639_data *data = max6639_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], + data->rpm_range)); +} + +static ssize_t alarm_show(struct device *dev, + struct device_attribute *dev_attr, char *buf) +{ + struct max6639_data *data = max6639_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); + + if (IS_ERR(data)) + return PTR_ERR(data); + + return sprintf(buf, "%d\n", !!(data->status & (1 << attr->index))); +} + +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); +static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1); +static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); +static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); +static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp_crit, 0); +static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp_crit, 1); +static SENSOR_DEVICE_ATTR_RW(temp1_emergency, temp_emergency, 0); +static SENSOR_DEVICE_ATTR_RW(temp2_emergency, temp_emergency, 1); +static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); +static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); +static SENSOR_DEVICE_ATTR_RO(fan1_fault, alarm, 1); +static SENSOR_DEVICE_ATTR_RO(fan2_fault, alarm, 0); +static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 3); +static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 2); +static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 7); +static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 6); +static SENSOR_DEVICE_ATTR_RO(temp1_emergency_alarm, alarm, 5); +static SENSOR_DEVICE_ATTR_RO(temp2_emergency_alarm, alarm, 4); + + +static struct attribute *max6639_attrs[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp1_fault.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp1_emergency.dev_attr.attr, + &sensor_dev_attr_temp2_emergency.dev_attr.attr, + &sensor_dev_attr_pwm1.dev_attr.attr, + &sensor_dev_attr_pwm2.dev_attr.attr, + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan1_fault.dev_attr.attr, + &sensor_dev_attr_fan2_fault.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, + NULL +}; +ATTRIBUTE_GROUPS(max6639); + +/* + * returns respective index in rpm_ranges table + * 1 by default on invalid range + */ +static int rpm_range_to_reg(int range) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(rpm_ranges); i++) { + if (rpm_ranges[i] == range) + return i; + } + + return 1; /* default: 4000 RPM */ +} + +static int max6639_init_client(struct i2c_client *client, + struct max6639_data *data) +{ + struct max6639_platform_data *max6639_info = + dev_get_platdata(&client->dev); + int i; + int rpm_range = 1; /* default: 4000 RPM */ + int err; + + /* Reset chip to default values, see below for GCONFIG setup */ + err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, + MAX6639_GCONFIG_POR); + if (err) + goto exit; + + /* Fans pulse per revolution is 2 by default */ + if (max6639_info && max6639_info->ppr > 0 && + max6639_info->ppr < 5) + data->ppr = max6639_info->ppr; + else + data->ppr = 2; + data->ppr -= 1; + + if (max6639_info) + rpm_range = rpm_range_to_reg(max6639_info->rpm_range); + data->rpm_range = rpm_range; + + for (i = 0; i < 2; i++) { + + /* Set Fan pulse per revolution */ + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_PPR(i), + data->ppr << 6); + if (err) + goto exit; + + /* Fans config PWM, RPM */ + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG1(i), + MAX6639_FAN_CONFIG1_PWM | rpm_range); + if (err) + goto exit; + + /* Fans PWM polarity high by default */ + if (max6639_info && max6639_info->pwm_polarity == 0) + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i), 0x00); + else + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i), 0x02); + if (err) + goto exit; + + /* + * /THERM full speed enable, + * PWM frequency 25kHz, see also GCONFIG below + */ + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i), + MAX6639_FAN_CONFIG3_THERM_FULL_SPEED | 0x03); + if (err) + goto exit; + + /* Max. temp. 80C/90C/100C */ + data->temp_therm[i] = 80; + data->temp_alert[i] = 90; + data->temp_ot[i] = 100; + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_THERM_LIMIT(i), + data->temp_therm[i]); + if (err) + goto exit; + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_ALERT_LIMIT(i), + data->temp_alert[i]); + if (err) + goto exit; + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_OT_LIMIT(i), data->temp_ot[i]); + if (err) + goto exit; + + /* PWM 120/120 (i.e. 100%) */ + data->pwm[i] = 120; + err = i2c_smbus_write_byte_data(client, + MAX6639_REG_TARGTDUTY(i), data->pwm[i]); + if (err) + goto exit; + } + /* Start monitoring */ + err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, + MAX6639_GCONFIG_DISABLE_TIMEOUT | MAX6639_GCONFIG_CH2_LOCAL | + MAX6639_GCONFIG_PWM_FREQ_HI); +exit: + return err; +} + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int max6639_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + int dev_id, manu_id; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + /* Actual detection via device and manufacturer ID */ + dev_id = i2c_smbus_read_byte_data(client, MAX6639_REG_DEVID); + manu_id = i2c_smbus_read_byte_data(client, MAX6639_REG_MANUID); + if (dev_id != 0x58 || manu_id != 0x4D) + return -ENODEV; + + strscpy(info->type, "max6639", I2C_NAME_SIZE); + + return 0; +} + +static void max6639_regulator_disable(void *data) +{ + regulator_disable(data); +} + +static int max6639_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct max6639_data *data; + struct device *hwmon_dev; + int err; + + data = devm_kzalloc(dev, sizeof(struct max6639_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + + data->reg = devm_regulator_get_optional(dev, "fan"); + if (IS_ERR(data->reg)) { + if (PTR_ERR(data->reg) != -ENODEV) + return PTR_ERR(data->reg); + + data->reg = NULL; + } else { + /* Spin up fans */ + err = regulator_enable(data->reg); + if (err) { + dev_err(dev, "Failed to enable fan supply: %d\n", err); + return err; + } + err = devm_add_action_or_reset(dev, max6639_regulator_disable, + data->reg); + if (err) { + dev_err(dev, "Failed to register action: %d\n", err); + return err; + } + } + + mutex_init(&data->update_lock); + + /* Initialize the max6639 chip */ + err = max6639_init_client(client, data); + if (err < 0) + return err; + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, + max6639_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static int max6639_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max6639_data *data = dev_get_drvdata(dev); + int ret = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + + if (ret < 0) + return ret; + + if (data->reg) + regulator_disable(data->reg); + + return i2c_smbus_write_byte_data(client, + MAX6639_REG_GCONFIG, ret | MAX6639_GCONFIG_STANDBY); +} + +static int max6639_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max6639_data *data = dev_get_drvdata(dev); + int ret; + + if (data->reg) { + ret = regulator_enable(data->reg); + if (ret) { + dev_err(dev, "Failed to enable fan supply: %d\n", ret); + return ret; + } + } + + ret = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(client, + MAX6639_REG_GCONFIG, ret & ~MAX6639_GCONFIG_STANDBY); +} + +static const struct i2c_device_id max6639_id[] = { + {"max6639", 0}, + { } +}; + +MODULE_DEVICE_TABLE(i2c, max6639_id); + +static DEFINE_SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume); + +static struct i2c_driver max6639_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "max6639", + .pm = pm_sleep_ptr(&max6639_pm_ops), + }, + .probe_new = max6639_probe, + .id_table = max6639_id, + .detect = max6639_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(max6639_driver); + +MODULE_AUTHOR("Roland Stigge "); +MODULE_DESCRIPTION("max6639 driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3