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/regulator/max597x-regulator.c | 501 ++++++++++++++++++++++++++++++++++ 1 file changed, 501 insertions(+) create mode 100644 drivers/regulator/max597x-regulator.c (limited to 'drivers/regulator/max597x-regulator.c') diff --git a/drivers/regulator/max597x-regulator.c b/drivers/regulator/max597x-regulator.c new file mode 100644 index 000000000..39f803ff0 --- /dev/null +++ b/drivers/regulator/max597x-regulator.c @@ -0,0 +1,501 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Device driver for regulators in MAX5970 and MAX5978 IC + * + * Copyright (c) 2022 9elements GmbH + * + * Author: Patrick Rudolph + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +struct max597x_regulator { + int num_switches, mon_rng, irng, shunt_micro_ohms, lim_uA; + struct regmap *regmap; +}; + +enum max597x_regulator_id { + MAX597X_SW0, + MAX597X_SW1, +}; + +static int max597x_uvp_ovp_check_mode(struct regulator_dev *rdev, int severity) +{ + int ret, reg; + + /* Status1 register contains the soft strap values sampled at POR */ + ret = regmap_read(rdev->regmap, MAX5970_REG_STATUS1, ®); + if (ret) + return ret; + + /* Check soft straps match requested mode */ + if (severity == REGULATOR_SEVERITY_PROT) { + if (STATUS1_PROT(reg) != STATUS1_PROT_SHUTDOWN) + return -EOPNOTSUPP; + + return 0; + } + if (STATUS1_PROT(reg) == STATUS1_PROT_SHUTDOWN) + return -EOPNOTSUPP; + + return 0; +} + +static int max597x_set_vp(struct regulator_dev *rdev, int lim_uV, int severity, + bool enable, bool overvoltage) +{ + int off_h, off_l, reg, ret; + struct max597x_regulator *data = rdev_get_drvdata(rdev); + int channel = rdev_get_id(rdev); + + if (overvoltage) { + if (severity == REGULATOR_SEVERITY_WARN) { + off_h = MAX5970_REG_CH_OV_WARN_H(channel); + off_l = MAX5970_REG_CH_OV_WARN_L(channel); + } else { + off_h = MAX5970_REG_CH_OV_CRIT_H(channel); + off_l = MAX5970_REG_CH_OV_CRIT_L(channel); + } + } else { + if (severity == REGULATOR_SEVERITY_WARN) { + off_h = MAX5970_REG_CH_UV_WARN_H(channel); + off_l = MAX5970_REG_CH_UV_WARN_L(channel); + } else { + off_h = MAX5970_REG_CH_UV_CRIT_H(channel); + off_l = MAX5970_REG_CH_UV_CRIT_L(channel); + } + } + + if (enable) + /* reg = ADC_MASK * (lim_uV / 1000000) / (data->mon_rng / 1000000) */ + reg = ADC_MASK * lim_uV / data->mon_rng; + else + reg = 0; + + ret = regmap_write(rdev->regmap, off_h, MAX5970_VAL2REG_H(reg)); + if (ret) + return ret; + + ret = regmap_write(rdev->regmap, off_l, MAX5970_VAL2REG_L(reg)); + if (ret) + return ret; + + return 0; +} + +static int max597x_set_uvp(struct regulator_dev *rdev, int lim_uV, int severity, + bool enable) +{ + int ret; + + /* + * MAX5970 has enable control as a special value in limit reg. Can't + * set limit but keep feature disabled or enable W/O given limit. + */ + if ((lim_uV && !enable) || (!lim_uV && enable)) + return -EINVAL; + + ret = max597x_uvp_ovp_check_mode(rdev, severity); + if (ret) + return ret; + + return max597x_set_vp(rdev, lim_uV, severity, enable, false); +} + +static int max597x_set_ovp(struct regulator_dev *rdev, int lim_uV, int severity, + bool enable) +{ + int ret; + + /* + * MAX5970 has enable control as a special value in limit reg. Can't + * set limit but keep feature disabled or enable W/O given limit. + */ + if ((lim_uV && !enable) || (!lim_uV && enable)) + return -EINVAL; + + ret = max597x_uvp_ovp_check_mode(rdev, severity); + if (ret) + return ret; + + return max597x_set_vp(rdev, lim_uV, severity, enable, true); +} + +static int max597x_set_ocp(struct regulator_dev *rdev, int lim_uA, + int severity, bool enable) +{ + int val, reg; + unsigned int vthst, vthfst; + + struct max597x_regulator *data = rdev_get_drvdata(rdev); + int rdev_id = rdev_get_id(rdev); + /* + * MAX5970 doesn't has enable control for ocp. + * If limit is specified but enable is not set then hold the value in + * variable & later use it when ocp needs to be enabled. + */ + if (lim_uA != 0 && lim_uA != data->lim_uA) + data->lim_uA = lim_uA; + + if (severity != REGULATOR_SEVERITY_PROT) + return -EINVAL; + + if (enable) { + + /* Calc Vtrip threshold in uV. */ + vthst = + div_u64(mul_u32_u32(data->shunt_micro_ohms, data->lim_uA), + 1000000); + + /* + * As recommended in datasheed, add 20% margin to avoid + * spurious event & passive component tolerance. + */ + vthst = div_u64(mul_u32_u32(vthst, 120), 100); + + /* Calc fast Vtrip threshold in uV */ + vthfst = vthst * (MAX5970_FAST2SLOW_RATIO / 100); + + if (vthfst > data->irng) { + dev_err(&rdev->dev, "Current limit out of range\n"); + return -EINVAL; + } + /* Fast trip threshold to be programmed */ + val = div_u64(mul_u32_u32(0xFF, vthfst), data->irng); + } else + /* + * Since there is no option to disable ocp, set limit to max + * value + */ + val = 0xFF; + + reg = MAX5970_REG_DAC_FAST(rdev_id); + + return regmap_write(rdev->regmap, reg, val); +} + +static int max597x_get_status(struct regulator_dev *rdev) +{ + int val, ret; + + ret = regmap_read(rdev->regmap, MAX5970_REG_STATUS3, &val); + if (ret) + return REGULATOR_FAILED_RETRY; + + if (val & MAX5970_STATUS3_ALERT) + return REGULATOR_STATUS_ERROR; + + ret = regulator_is_enabled_regmap(rdev); + if (ret < 0) + return ret; + + if (ret) + return REGULATOR_STATUS_ON; + + return REGULATOR_STATUS_OFF; +} + +static const struct regulator_ops max597x_switch_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_status = max597x_get_status, + .set_over_voltage_protection = max597x_set_ovp, + .set_under_voltage_protection = max597x_set_uvp, + .set_over_current_protection = max597x_set_ocp, +}; + +static int max597x_dt_parse(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *cfg) +{ + struct max597x_regulator *data = cfg->driver_data; + int ret = 0; + + ret = + of_property_read_u32(np, "shunt-resistor-micro-ohms", + &data->shunt_micro_ohms); + if (ret < 0) + dev_err(cfg->dev, + "property 'shunt-resistor-micro-ohms' not found, err %d\n", + ret); + return ret; + +} + +#define MAX597X_SWITCH(_ID, _ereg, _chan, _supply) { \ + .name = #_ID, \ + .of_match = of_match_ptr(#_ID), \ + .ops = &max597x_switch_ops, \ + .regulators_node = of_match_ptr("regulators"), \ + .type = REGULATOR_VOLTAGE, \ + .id = MAX597X_##_ID, \ + .owner = THIS_MODULE, \ + .supply_name = _supply, \ + .enable_reg = _ereg, \ + .enable_mask = CHXEN((_chan)), \ + .of_parse_cb = max597x_dt_parse, \ +} + +static const struct regulator_desc regulators[] = { + MAX597X_SWITCH(SW0, MAX5970_REG_CHXEN, 0, "vss1"), + MAX597X_SWITCH(SW1, MAX5970_REG_CHXEN, 1, "vss2"), +}; + +static int max597x_regmap_read_clear(struct regmap *map, unsigned int reg, + unsigned int *val) +{ + int ret; + + ret = regmap_read(map, reg, val); + if (ret) + return ret; + + if (*val) + return regmap_write(map, reg, *val); + + return 0; +} + +static int max597x_irq_handler(int irq, struct regulator_irq_data *rid, + unsigned long *dev_mask) +{ + struct regulator_err_state *stat; + struct max597x_regulator *d = (struct max597x_regulator *)rid->data; + int val, ret, i; + + ret = max597x_regmap_read_clear(d->regmap, MAX5970_REG_FAULT0, &val); + if (ret) + return REGULATOR_FAILED_RETRY; + + *dev_mask = 0; + for (i = 0; i < d->num_switches; i++) { + stat = &rid->states[i]; + stat->notifs = 0; + stat->errors = 0; + } + + for (i = 0; i < d->num_switches; i++) { + stat = &rid->states[i]; + + if (val & UV_STATUS_CRIT(i)) { + *dev_mask |= 1 << i; + stat->notifs |= REGULATOR_EVENT_UNDER_VOLTAGE; + stat->errors |= REGULATOR_ERROR_UNDER_VOLTAGE; + } else if (val & UV_STATUS_WARN(i)) { + *dev_mask |= 1 << i; + stat->notifs |= REGULATOR_EVENT_UNDER_VOLTAGE_WARN; + stat->errors |= REGULATOR_ERROR_UNDER_VOLTAGE_WARN; + } + } + + ret = max597x_regmap_read_clear(d->regmap, MAX5970_REG_FAULT1, &val); + if (ret) + return REGULATOR_FAILED_RETRY; + + for (i = 0; i < d->num_switches; i++) { + stat = &rid->states[i]; + + if (val & OV_STATUS_CRIT(i)) { + *dev_mask |= 1 << i; + stat->notifs |= REGULATOR_EVENT_REGULATION_OUT; + stat->errors |= REGULATOR_ERROR_REGULATION_OUT; + } else if (val & OV_STATUS_WARN(i)) { + *dev_mask |= 1 << i; + stat->notifs |= REGULATOR_EVENT_OVER_VOLTAGE_WARN; + stat->errors |= REGULATOR_ERROR_OVER_VOLTAGE_WARN; + } + } + + ret = max597x_regmap_read_clear(d->regmap, MAX5970_REG_FAULT2, &val); + if (ret) + return REGULATOR_FAILED_RETRY; + + for (i = 0; i < d->num_switches; i++) { + stat = &rid->states[i]; + + if (val & OC_STATUS_WARN(i)) { + *dev_mask |= 1 << i; + stat->notifs |= REGULATOR_EVENT_OVER_CURRENT_WARN; + stat->errors |= REGULATOR_ERROR_OVER_CURRENT_WARN; + } + } + + ret = regmap_read(d->regmap, MAX5970_REG_STATUS0, &val); + if (ret) + return REGULATOR_FAILED_RETRY; + + for (i = 0; i < d->num_switches; i++) { + stat = &rid->states[i]; + + if ((val & MAX5970_CB_IFAULTF(i)) + || (val & MAX5970_CB_IFAULTS(i))) { + *dev_mask |= 1 << i; + stat->notifs |= + REGULATOR_EVENT_OVER_CURRENT | + REGULATOR_EVENT_DISABLE; + stat->errors |= + REGULATOR_ERROR_OVER_CURRENT | REGULATOR_ERROR_FAIL; + + /* Clear the sub-IRQ status */ + regulator_disable_regmap(stat->rdev); + } + } + return 0; +} + +static const struct regmap_config max597x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX_REGISTERS, +}; + +static int max597x_adc_range(struct regmap *regmap, const int ch, + u32 *irng, u32 *mon_rng) +{ + unsigned int reg; + int ret; + + /* Decode current ADC range */ + ret = regmap_read(regmap, MAX5970_REG_STATUS2, ®); + if (ret) + return ret; + switch (MAX5970_IRNG(reg, ch)) { + case 0: + *irng = 100000; /* 100 mV */ + break; + case 1: + *irng = 50000; /* 50 mV */ + break; + case 2: + *irng = 25000; /* 25 mV */ + break; + default: + return -EINVAL; + } + + /* Decode current voltage monitor range */ + ret = regmap_read(regmap, MAX5970_REG_MON_RANGE, ®); + if (ret) + return ret; + + *mon_rng = MAX5970_MON_MAX_RANGE_UV >> MAX5970_MON(reg, ch); + + return 0; +} + +static int max597x_setup_irq(struct device *dev, + int irq, + struct regulator_dev *rdevs[MAX5970_NUM_SWITCHES], + int num_switches, struct max597x_regulator *data) +{ + struct regulator_irq_desc max597x_notif = { + .name = "max597x-irq", + .map_event = max597x_irq_handler, + .data = data, + }; + int errs = REGULATOR_ERROR_UNDER_VOLTAGE | + REGULATOR_ERROR_UNDER_VOLTAGE_WARN | + REGULATOR_ERROR_OVER_VOLTAGE_WARN | + REGULATOR_ERROR_REGULATION_OUT | + REGULATOR_ERROR_OVER_CURRENT | + REGULATOR_ERROR_OVER_CURRENT_WARN | REGULATOR_ERROR_FAIL; + void *irq_helper; + + /* Register notifiers - can fail if IRQ is not given */ + irq_helper = devm_regulator_irq_helper(dev, &max597x_notif, + irq, 0, errs, NULL, + &rdevs[0], num_switches); + if (IS_ERR(irq_helper)) { + if (PTR_ERR(irq_helper) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + dev_warn(dev, "IRQ disabled %pe\n", irq_helper); + } + + return 0; +} + +static int max597x_regulator_probe(struct platform_device *pdev) +{ + + + struct max597x_data *max597x = dev_get_drvdata(pdev->dev.parent); + struct max597x_regulator *data; + + struct regulator_config config = { }; + struct regulator_dev *rdev; + struct regulator_dev *rdevs[MAX5970_NUM_SWITCHES]; + int num_switches = max597x->num_switches; + int ret, i; + + for (i = 0; i < num_switches; i++) { + data = + devm_kzalloc(max597x->dev, sizeof(struct max597x_regulator), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->num_switches = num_switches; + data->regmap = max597x->regmap; + + ret = max597x_adc_range(data->regmap, i, &max597x->irng[i], &max597x->mon_rng[i]); + if (ret < 0) + return ret; + + data->irng = max597x->irng[i]; + data->mon_rng = max597x->mon_rng[i]; + + config.dev = max597x->dev; + config.driver_data = (void *)data; + config.regmap = data->regmap; + rdev = devm_regulator_register(max597x->dev, + ®ulators[i], &config); + if (IS_ERR(rdev)) { + dev_err(max597x->dev, "failed to register regulator %s\n", + regulators[i].name); + return PTR_ERR(rdev); + } + rdevs[i] = rdev; + max597x->shunt_micro_ohms[i] = data->shunt_micro_ohms; + } + + if (max597x->irq) { + ret = + max597x_setup_irq(max597x->dev, max597x->irq, rdevs, num_switches, + data); + if (ret) { + dev_err(max597x->dev, "IRQ setup failed"); + return ret; + } + } + + return ret; +} + +static struct platform_driver max597x_regulator_driver = { + .driver = { + .name = "max597x-regulator", + }, + .probe = max597x_regulator_probe, +}; + +module_platform_driver(max597x_regulator_driver); + + +MODULE_AUTHOR("Patrick Rudolph "); +MODULE_DESCRIPTION("MAX5970_hot-swap controller driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3