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/leds/leds-pwm.c | 217 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 217 insertions(+) create mode 100644 drivers/leds/leds-pwm.c (limited to 'drivers/leds/leds-pwm.c') diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c new file mode 100644 index 000000000..6832180c1 --- /dev/null +++ b/drivers/leds/leds-pwm.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/leds-pwm.c + * + * simple PWM based LED control + * + * Copyright 2009 Luotao Fu @ Pengutronix (l.fu@pengutronix.de) + * + * based on leds-gpio.c by Raphael Assenat + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "leds.h" + +struct led_pwm { + const char *name; + u8 active_low; + u8 default_state; + unsigned int max_brightness; +}; + +struct led_pwm_data { + struct led_classdev cdev; + struct pwm_device *pwm; + struct pwm_state pwmstate; + unsigned int active_low; +}; + +struct led_pwm_priv { + int num_leds; + struct led_pwm_data leds[]; +}; + +static int led_pwm_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct led_pwm_data *led_dat = + container_of(led_cdev, struct led_pwm_data, cdev); + unsigned int max = led_dat->cdev.max_brightness; + unsigned long long duty = led_dat->pwmstate.period; + + duty *= brightness; + do_div(duty, max); + + if (led_dat->active_low) + duty = led_dat->pwmstate.period - duty; + + led_dat->pwmstate.duty_cycle = duty; + led_dat->pwmstate.enabled = duty > 0; + return pwm_apply_state(led_dat->pwm, &led_dat->pwmstate); +} + +__attribute__((nonnull)) +static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv, + struct led_pwm *led, struct fwnode_handle *fwnode) +{ + struct led_pwm_data *led_data = &priv->leds[priv->num_leds]; + struct led_init_data init_data = { .fwnode = fwnode }; + int ret; + + led_data->active_low = led->active_low; + led_data->cdev.name = led->name; + led_data->cdev.brightness = LED_OFF; + led_data->cdev.max_brightness = led->max_brightness; + led_data->cdev.flags = LED_CORE_SUSPENDRESUME; + + led_data->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL); + if (IS_ERR(led_data->pwm)) + return dev_err_probe(dev, PTR_ERR(led_data->pwm), + "unable to request PWM for %s\n", + led->name); + + led_data->cdev.brightness_set_blocking = led_pwm_set; + + /* init PWM state */ + switch (led->default_state) { + case LEDS_DEFSTATE_KEEP: + pwm_get_state(led_data->pwm, &led_data->pwmstate); + if (led_data->pwmstate.period) + break; + led->default_state = LEDS_DEFSTATE_OFF; + dev_warn(dev, + "failed to read period for %s, default to off", + led->name); + fallthrough; + default: + pwm_init_state(led_data->pwm, &led_data->pwmstate); + break; + } + + /* set brightness */ + switch (led->default_state) { + case LEDS_DEFSTATE_ON: + led_data->cdev.brightness = led->max_brightness; + break; + case LEDS_DEFSTATE_KEEP: + { + uint64_t brightness; + + brightness = led->max_brightness; + brightness *= led_data->pwmstate.duty_cycle; + do_div(brightness, led_data->pwmstate.period); + led_data->cdev.brightness = brightness; + } + break; + } + + ret = devm_led_classdev_register_ext(dev, &led_data->cdev, &init_data); + if (ret) { + dev_err(dev, "failed to register PWM led for %s: %d\n", + led->name, ret); + return ret; + } + + if (led->default_state != LEDS_DEFSTATE_KEEP) { + ret = led_pwm_set(&led_data->cdev, led_data->cdev.brightness); + if (ret) { + dev_err(dev, "failed to set led PWM value for %s: %d", + led->name, ret); + return ret; + } + } + + priv->num_leds++; + return 0; +} + +static int led_pwm_create_fwnode(struct device *dev, struct led_pwm_priv *priv) +{ + struct fwnode_handle *fwnode; + struct led_pwm led; + int ret; + + memset(&led, 0, sizeof(led)); + + device_for_each_child_node(dev, fwnode) { + ret = fwnode_property_read_string(fwnode, "label", &led.name); + if (ret && is_of_node(fwnode)) + led.name = to_of_node(fwnode)->name; + + if (!led.name) { + ret = EINVAL; + goto err_child_out; + } + + led.active_low = fwnode_property_read_bool(fwnode, + "active-low"); + fwnode_property_read_u32(fwnode, "max-brightness", + &led.max_brightness); + + led.default_state = led_init_default_state_get(fwnode); + + ret = led_pwm_add(dev, priv, &led, fwnode); + if (ret) + goto err_child_out; + } + + return 0; + +err_child_out: + fwnode_handle_put(fwnode); + return ret; +} + +static int led_pwm_probe(struct platform_device *pdev) +{ + struct led_pwm_priv *priv; + int ret = 0; + int count; + + count = device_get_child_node_count(&pdev->dev); + + if (!count) + return -EINVAL; + + priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = led_pwm_create_fwnode(&pdev->dev, priv); + + if (ret) + return ret; + + platform_set_drvdata(pdev, priv); + + return 0; +} + +static const struct of_device_id of_pwm_leds_match[] = { + { .compatible = "pwm-leds", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_pwm_leds_match); + +static struct platform_driver led_pwm_driver = { + .probe = led_pwm_probe, + .driver = { + .name = "leds_pwm", + .of_match_table = of_pwm_leds_match, + }, +}; + +module_platform_driver(led_pwm_driver); + +MODULE_AUTHOR("Luotao Fu "); +MODULE_DESCRIPTION("generic PWM LED driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:leds-pwm"); -- cgit v1.2.3