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/pmbus/ucd9000.c | 632 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 632 insertions(+) create mode 100644 drivers/hwmon/pmbus/ucd9000.c (limited to 'drivers/hwmon/pmbus/ucd9000.c') diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c new file mode 100644 index 000000000..75fc770c9 --- /dev/null +++ b/drivers/hwmon/pmbus/ucd9000.c @@ -0,0 +1,632 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for UCD90xxx Sequencer and System Health + * Controller series + * + * Copyright (C) 2011 Ericsson AB. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd90320, ucd9090, + ucd90910 }; + +#define UCD9000_MONITOR_CONFIG 0xd5 +#define UCD9000_NUM_PAGES 0xd6 +#define UCD9000_FAN_CONFIG_INDEX 0xe7 +#define UCD9000_FAN_CONFIG 0xe8 +#define UCD9000_MFR_STATUS 0xf3 +#define UCD9000_GPIO_SELECT 0xfa +#define UCD9000_GPIO_CONFIG 0xfb +#define UCD9000_DEVICE_ID 0xfd + +/* GPIO CONFIG bits */ +#define UCD9000_GPIO_CONFIG_ENABLE BIT(0) +#define UCD9000_GPIO_CONFIG_OUT_ENABLE BIT(1) +#define UCD9000_GPIO_CONFIG_OUT_VALUE BIT(2) +#define UCD9000_GPIO_CONFIG_STATUS BIT(3) +#define UCD9000_GPIO_INPUT 0 +#define UCD9000_GPIO_OUTPUT 1 + +#define UCD9000_MON_TYPE(x) (((x) >> 5) & 0x07) +#define UCD9000_MON_PAGE(x) ((x) & 0x1f) + +#define UCD9000_MON_VOLTAGE 1 +#define UCD9000_MON_TEMPERATURE 2 +#define UCD9000_MON_CURRENT 3 +#define UCD9000_MON_VOLTAGE_HW 4 + +#define UCD9000_NUM_FAN 4 + +#define UCD9000_GPIO_NAME_LEN 16 +#define UCD9090_NUM_GPIOS 23 +#define UCD901XX_NUM_GPIOS 26 +#define UCD90320_NUM_GPIOS 84 +#define UCD90910_NUM_GPIOS 26 + +#define UCD9000_DEBUGFS_NAME_LEN 24 +#define UCD9000_GPI_COUNT 8 +#define UCD90320_GPI_COUNT 32 + +struct ucd9000_data { + u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX]; + struct pmbus_driver_info info; +#ifdef CONFIG_GPIOLIB + struct gpio_chip gpio; +#endif + struct dentry *debugfs; +}; +#define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info) + +struct ucd9000_debugfs_entry { + struct i2c_client *client; + u8 index; +}; + +static int ucd9000_get_fan_config(struct i2c_client *client, int fan) +{ + int fan_config = 0; + struct ucd9000_data *data + = to_ucd9000_data(pmbus_get_driver_info(client)); + + if (data->fan_data[fan][3] & 1) + fan_config |= PB_FAN_2_INSTALLED; /* Use lower bit position */ + + /* Pulses/revolution */ + fan_config |= (data->fan_data[fan][3] & 0x06) >> 1; + + return fan_config; +} + +static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg) +{ + int ret = 0; + int fan_config; + + switch (reg) { + case PMBUS_FAN_CONFIG_12: + if (page > 0) + return -ENXIO; + + ret = ucd9000_get_fan_config(client, 0); + if (ret < 0) + return ret; + fan_config = ret << 4; + ret = ucd9000_get_fan_config(client, 1); + if (ret < 0) + return ret; + fan_config |= ret; + ret = fan_config; + break; + case PMBUS_FAN_CONFIG_34: + if (page > 0) + return -ENXIO; + + ret = ucd9000_get_fan_config(client, 2); + if (ret < 0) + return ret; + fan_config = ret << 4; + ret = ucd9000_get_fan_config(client, 3); + if (ret < 0) + return ret; + fan_config |= ret; + ret = fan_config; + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + +static const struct i2c_device_id ucd9000_id[] = { + {"ucd9000", ucd9000}, + {"ucd90120", ucd90120}, + {"ucd90124", ucd90124}, + {"ucd90160", ucd90160}, + {"ucd90320", ucd90320}, + {"ucd9090", ucd9090}, + {"ucd90910", ucd90910}, + {} +}; +MODULE_DEVICE_TABLE(i2c, ucd9000_id); + +static const struct of_device_id __maybe_unused ucd9000_of_match[] = { + { + .compatible = "ti,ucd9000", + .data = (void *)ucd9000 + }, + { + .compatible = "ti,ucd90120", + .data = (void *)ucd90120 + }, + { + .compatible = "ti,ucd90124", + .data = (void *)ucd90124 + }, + { + .compatible = "ti,ucd90160", + .data = (void *)ucd90160 + }, + { + .compatible = "ti,ucd90320", + .data = (void *)ucd90320 + }, + { + .compatible = "ti,ucd9090", + .data = (void *)ucd9090 + }, + { + .compatible = "ti,ucd90910", + .data = (void *)ucd90910 + }, + { }, +}; +MODULE_DEVICE_TABLE(of, ucd9000_of_match); + +#ifdef CONFIG_GPIOLIB +static int ucd9000_gpio_read_config(struct i2c_client *client, + unsigned int offset) +{ + int ret; + + /* No page set required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_SELECT, offset); + if (ret < 0) + return ret; + + return i2c_smbus_read_byte_data(client, UCD9000_GPIO_CONFIG); +} + +static int ucd9000_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) + return ret; + + return !!(ret & UCD9000_GPIO_CONFIG_STATUS); +} + +static void ucd9000_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) { + dev_dbg(&client->dev, "failed to read GPIO %d config: %d\n", + offset, ret); + return; + } + + if (value) { + if (ret & UCD9000_GPIO_CONFIG_STATUS) + return; + + ret |= UCD9000_GPIO_CONFIG_STATUS; + } else { + if (!(ret & UCD9000_GPIO_CONFIG_STATUS)) + return; + + ret &= ~UCD9000_GPIO_CONFIG_STATUS; + } + + ret |= UCD9000_GPIO_CONFIG_ENABLE; + + /* Page set not required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret); + if (ret < 0) { + dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n", + offset, ret); + return; + } + + ret &= ~UCD9000_GPIO_CONFIG_ENABLE; + + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret); + if (ret < 0) + dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n", + offset, ret); +} + +static int ucd9000_gpio_get_direction(struct gpio_chip *gc, + unsigned int offset) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) + return ret; + + return !(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE); +} + +static int ucd9000_gpio_set_direction(struct gpio_chip *gc, + unsigned int offset, bool direction_out, + int requested_out) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret, config, out_val; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) + return ret; + + if (direction_out) { + out_val = requested_out ? UCD9000_GPIO_CONFIG_OUT_VALUE : 0; + + if (ret & UCD9000_GPIO_CONFIG_OUT_ENABLE) { + if ((ret & UCD9000_GPIO_CONFIG_OUT_VALUE) == out_val) + return 0; + } else { + ret |= UCD9000_GPIO_CONFIG_OUT_ENABLE; + } + + if (out_val) + ret |= UCD9000_GPIO_CONFIG_OUT_VALUE; + else + ret &= ~UCD9000_GPIO_CONFIG_OUT_VALUE; + + } else { + if (!(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE)) + return 0; + + ret &= ~UCD9000_GPIO_CONFIG_OUT_ENABLE; + } + + ret |= UCD9000_GPIO_CONFIG_ENABLE; + config = ret; + + /* Page set not required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config); + if (ret < 0) + return ret; + + config &= ~UCD9000_GPIO_CONFIG_ENABLE; + + return i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config); +} + +static int ucd9000_gpio_direction_input(struct gpio_chip *gc, + unsigned int offset) +{ + return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_INPUT, 0); +} + +static int ucd9000_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int val) +{ + return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_OUTPUT, + val); +} + +static void ucd9000_probe_gpio(struct i2c_client *client, + const struct i2c_device_id *mid, + struct ucd9000_data *data) +{ + int rc; + + switch (mid->driver_data) { + case ucd9090: + data->gpio.ngpio = UCD9090_NUM_GPIOS; + break; + case ucd90120: + case ucd90124: + case ucd90160: + data->gpio.ngpio = UCD901XX_NUM_GPIOS; + break; + case ucd90320: + data->gpio.ngpio = UCD90320_NUM_GPIOS; + break; + case ucd90910: + data->gpio.ngpio = UCD90910_NUM_GPIOS; + break; + default: + return; /* GPIO support is optional. */ + } + + /* + * Pinmux support has not been added to the new gpio_chip. + * This support should be added when possible given the mux + * behavior of these IO devices. + */ + data->gpio.label = client->name; + data->gpio.get_direction = ucd9000_gpio_get_direction; + data->gpio.direction_input = ucd9000_gpio_direction_input; + data->gpio.direction_output = ucd9000_gpio_direction_output; + data->gpio.get = ucd9000_gpio_get; + data->gpio.set = ucd9000_gpio_set; + data->gpio.can_sleep = true; + data->gpio.base = -1; + data->gpio.parent = &client->dev; + + rc = devm_gpiochip_add_data(&client->dev, &data->gpio, client); + if (rc) + dev_warn(&client->dev, "Could not add gpiochip: %d\n", rc); +} +#else +static void ucd9000_probe_gpio(struct i2c_client *client, + const struct i2c_device_id *mid, + struct ucd9000_data *data) +{ +} +#endif /* CONFIG_GPIOLIB */ + +#ifdef CONFIG_DEBUG_FS +static int ucd9000_get_mfr_status(struct i2c_client *client, u8 *buffer) +{ + int ret = pmbus_set_page(client, 0, 0xff); + + if (ret < 0) + return ret; + + return i2c_smbus_read_block_data(client, UCD9000_MFR_STATUS, buffer); +} + +static int ucd9000_debugfs_show_mfr_status_bit(void *data, u64 *val) +{ + struct ucd9000_debugfs_entry *entry = data; + struct i2c_client *client = entry->client; + u8 buffer[I2C_SMBUS_BLOCK_MAX]; + int ret, i; + + ret = ucd9000_get_mfr_status(client, buffer); + if (ret < 0) + return ret; + + /* + * GPI fault bits are in sets of 8, two bytes from end of response. + */ + i = ret - 3 - entry->index / 8; + if (i >= 0) + *val = !!(buffer[i] & BIT(entry->index % 8)); + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_bit, + ucd9000_debugfs_show_mfr_status_bit, NULL, "%1lld\n"); + +static ssize_t ucd9000_debugfs_read_mfr_status(struct file *file, + char __user *buf, size_t count, + loff_t *ppos) +{ + struct i2c_client *client = file->private_data; + u8 buffer[I2C_SMBUS_BLOCK_MAX]; + char str[(I2C_SMBUS_BLOCK_MAX * 2) + 2]; + char *res; + int rc; + + rc = ucd9000_get_mfr_status(client, buffer); + if (rc < 0) + return rc; + + res = bin2hex(str, buffer, min(rc, I2C_SMBUS_BLOCK_MAX)); + *res++ = '\n'; + *res = 0; + + return simple_read_from_buffer(buf, count, ppos, str, res - str); +} + +static const struct file_operations ucd9000_debugfs_show_mfr_status_fops = { + .llseek = noop_llseek, + .read = ucd9000_debugfs_read_mfr_status, + .open = simple_open, +}; + +static int ucd9000_init_debugfs(struct i2c_client *client, + const struct i2c_device_id *mid, + struct ucd9000_data *data) +{ + struct dentry *debugfs; + struct ucd9000_debugfs_entry *entries; + int i, gpi_count; + char name[UCD9000_DEBUGFS_NAME_LEN]; + + debugfs = pmbus_get_debugfs_dir(client); + if (!debugfs) + return -ENOENT; + + data->debugfs = debugfs_create_dir(client->name, debugfs); + if (!data->debugfs) + return -ENOENT; + + /* + * Of the chips this driver supports, only the UCD9090, UCD90160, + * UCD90320, and UCD90910 report GPI faults in their MFR_STATUS + * register, so only create the GPI fault debugfs attributes for those + * chips. + */ + if (mid->driver_data == ucd9090 || mid->driver_data == ucd90160 || + mid->driver_data == ucd90320 || mid->driver_data == ucd90910) { + gpi_count = mid->driver_data == ucd90320 ? UCD90320_GPI_COUNT + : UCD9000_GPI_COUNT; + entries = devm_kcalloc(&client->dev, + gpi_count, sizeof(*entries), + GFP_KERNEL); + if (!entries) + return -ENOMEM; + + for (i = 0; i < gpi_count; i++) { + entries[i].client = client; + entries[i].index = i; + scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, + "gpi%d_alarm", i + 1); + debugfs_create_file(name, 0444, data->debugfs, + &entries[i], + &ucd9000_debugfs_mfr_status_bit); + } + } + + scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, "mfr_status"); + debugfs_create_file(name, 0444, data->debugfs, client, + &ucd9000_debugfs_show_mfr_status_fops); + + return 0; +} +#else +static int ucd9000_init_debugfs(struct i2c_client *client, + const struct i2c_device_id *mid, + struct ucd9000_data *data) +{ + return 0; +} +#endif /* CONFIG_DEBUG_FS */ + +static int ucd9000_probe(struct i2c_client *client) +{ + u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; + struct ucd9000_data *data; + struct pmbus_driver_info *info; + const struct i2c_device_id *mid; + enum chips chip; + int i, ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_BLOCK_DATA)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID, + block_buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read device ID\n"); + return ret; + } + block_buffer[ret] = '\0'; + dev_info(&client->dev, "Device ID %s\n", block_buffer); + + for (mid = ucd9000_id; mid->name[0]; mid++) { + if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) + break; + } + if (!mid->name[0]) { + dev_err(&client->dev, "Unsupported device\n"); + return -ENODEV; + } + + if (client->dev.of_node) + chip = (enum chips)of_device_get_match_data(&client->dev); + else + chip = mid->driver_data; + + if (chip != ucd9000 && strcmp(client->name, mid->name) != 0) + dev_notice(&client->dev, + "Device mismatch: Configured %s, detected %s\n", + client->name, mid->name); + + data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + info = &data->info; + + ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES); + if (ret < 0) { + dev_err(&client->dev, + "Failed to read number of active pages\n"); + return ret; + } + info->pages = ret; + if (!info->pages) { + dev_err(&client->dev, "No pages configured\n"); + return -ENODEV; + } + + /* The internal temperature sensor is always active */ + info->func[0] = PMBUS_HAVE_TEMP; + + /* Everything else is configurable */ + ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG, + block_buffer); + if (ret <= 0) { + dev_err(&client->dev, "Failed to read configuration data\n"); + return -ENODEV; + } + for (i = 0; i < ret; i++) { + int page = UCD9000_MON_PAGE(block_buffer[i]); + + if (page >= info->pages) + continue; + + switch (UCD9000_MON_TYPE(block_buffer[i])) { + case UCD9000_MON_VOLTAGE: + case UCD9000_MON_VOLTAGE_HW: + info->func[page] |= PMBUS_HAVE_VOUT + | PMBUS_HAVE_STATUS_VOUT; + break; + case UCD9000_MON_TEMPERATURE: + info->func[page] |= PMBUS_HAVE_TEMP2 + | PMBUS_HAVE_STATUS_TEMP; + break; + case UCD9000_MON_CURRENT: + info->func[page] |= PMBUS_HAVE_IOUT + | PMBUS_HAVE_STATUS_IOUT; + break; + default: + break; + } + } + + /* Fan configuration */ + if (mid->driver_data == ucd90124) { + for (i = 0; i < UCD9000_NUM_FAN; i++) { + i2c_smbus_write_byte_data(client, + UCD9000_FAN_CONFIG_INDEX, i); + ret = i2c_smbus_read_block_data(client, + UCD9000_FAN_CONFIG, + data->fan_data[i]); + if (ret < 0) + return ret; + } + i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0); + + info->read_byte_data = ucd9000_read_byte_data; + info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 + | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34; + } + + ucd9000_probe_gpio(client, mid, data); + + ret = pmbus_do_probe(client, info); + if (ret) + return ret; + + ret = ucd9000_init_debugfs(client, mid, data); + if (ret) + dev_warn(&client->dev, "Failed to register debugfs: %d\n", + ret); + + return 0; +} + +/* This is the driver that will be inserted */ +static struct i2c_driver ucd9000_driver = { + .driver = { + .name = "ucd9000", + .of_match_table = of_match_ptr(ucd9000_of_match), + }, + .probe_new = ucd9000_probe, + .id_table = ucd9000_id, +}; + +module_i2c_driver(ucd9000_driver); + +MODULE_AUTHOR("Guenter Roeck"); +MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); -- cgit v1.2.3