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-gpio.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 312 insertions(+) create mode 100644 drivers/leds/leds-gpio.c (limited to 'drivers/leds/leds-gpio.c') diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c new file mode 100644 index 000000000..ce4e79939 --- /dev/null +++ b/drivers/leds/leds-gpio.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * LEDs driver for GPIOs + * + * Copyright (C) 2007 8D Technologies inc. + * Raphael Assenat + * Copyright (C) 2008 Freescale Semiconductor, Inc. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "leds.h" + +struct gpio_led_data { + struct led_classdev cdev; + struct gpio_desc *gpiod; + u8 can_sleep; + u8 blinking; + gpio_blink_set_t platform_gpio_blink_set; +}; + +static inline struct gpio_led_data * + cdev_to_gpio_led_data(struct led_classdev *led_cdev) +{ + return container_of(led_cdev, struct gpio_led_data, cdev); +} + +static void gpio_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev); + int level; + + if (value == LED_OFF) + level = 0; + else + level = 1; + + if (led_dat->blinking) { + led_dat->platform_gpio_blink_set(led_dat->gpiod, level, + NULL, NULL); + led_dat->blinking = 0; + } else { + if (led_dat->can_sleep) + gpiod_set_value_cansleep(led_dat->gpiod, level); + else + gpiod_set_value(led_dat->gpiod, level); + } +} + +static int gpio_led_set_blocking(struct led_classdev *led_cdev, + enum led_brightness value) +{ + gpio_led_set(led_cdev, value); + return 0; +} + +static int gpio_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, unsigned long *delay_off) +{ + struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev); + + led_dat->blinking = 1; + return led_dat->platform_gpio_blink_set(led_dat->gpiod, GPIO_LED_BLINK, + delay_on, delay_off); +} + +static int create_gpio_led(const struct gpio_led *template, + struct gpio_led_data *led_dat, struct device *parent, + struct fwnode_handle *fwnode, gpio_blink_set_t blink_set) +{ + struct led_init_data init_data = {}; + int ret, state; + + led_dat->cdev.default_trigger = template->default_trigger; + led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod); + if (!led_dat->can_sleep) + led_dat->cdev.brightness_set = gpio_led_set; + else + led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking; + led_dat->blinking = 0; + if (blink_set) { + led_dat->platform_gpio_blink_set = blink_set; + led_dat->cdev.blink_set = gpio_blink_set; + } + if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) { + state = gpiod_get_value_cansleep(led_dat->gpiod); + if (state < 0) + return state; + } else { + state = (template->default_state == LEDS_GPIO_DEFSTATE_ON); + } + led_dat->cdev.brightness = state; + led_dat->cdev.max_brightness = 1; + if (!template->retain_state_suspended) + led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; + if (template->panic_indicator) + led_dat->cdev.flags |= LED_PANIC_INDICATOR; + if (template->retain_state_shutdown) + led_dat->cdev.flags |= LED_RETAIN_AT_SHUTDOWN; + + ret = gpiod_direction_output(led_dat->gpiod, state); + if (ret < 0) + return ret; + + if (template->name) { + led_dat->cdev.name = template->name; + ret = devm_led_classdev_register(parent, &led_dat->cdev); + } else { + init_data.fwnode = fwnode; + ret = devm_led_classdev_register_ext(parent, &led_dat->cdev, + &init_data); + } + + return ret; +} + +struct gpio_leds_priv { + int num_leds; + struct gpio_led_data leds[]; +}; + +static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct fwnode_handle *child; + struct gpio_leds_priv *priv; + int count, ret; + + count = device_get_child_node_count(dev); + if (!count) + return ERR_PTR(-ENODEV); + + priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL); + if (!priv) + return ERR_PTR(-ENOMEM); + + device_for_each_child_node(dev, child) { + struct gpio_led_data *led_dat = &priv->leds[priv->num_leds]; + struct gpio_led led = {}; + + /* + * Acquire gpiod from DT with uninitialized label, which + * will be updated after LED class device is registered, + * Only then the final LED name is known. + */ + led.gpiod = devm_fwnode_gpiod_get(dev, child, NULL, GPIOD_ASIS, + NULL); + if (IS_ERR(led.gpiod)) { + fwnode_handle_put(child); + return ERR_CAST(led.gpiod); + } + + led_dat->gpiod = led.gpiod; + + led.default_state = led_init_default_state_get(child); + + if (fwnode_property_present(child, "retain-state-suspended")) + led.retain_state_suspended = 1; + if (fwnode_property_present(child, "retain-state-shutdown")) + led.retain_state_shutdown = 1; + if (fwnode_property_present(child, "panic-indicator")) + led.panic_indicator = 1; + + ret = create_gpio_led(&led, led_dat, dev, child, NULL); + if (ret < 0) { + fwnode_handle_put(child); + return ERR_PTR(ret); + } + /* Set gpiod label to match the corresponding LED name. */ + gpiod_set_consumer_name(led_dat->gpiod, + led_dat->cdev.dev->kobj.name); + priv->num_leds++; + } + + return priv; +} + +static const struct of_device_id of_gpio_leds_match[] = { + { .compatible = "gpio-leds", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, of_gpio_leds_match); + +static struct gpio_desc *gpio_led_get_gpiod(struct device *dev, int idx, + const struct gpio_led *template) +{ + struct gpio_desc *gpiod; + unsigned long flags = GPIOF_OUT_INIT_LOW; + int ret; + + /* + * This means the LED does not come from the device tree + * or ACPI, so let's try just getting it by index from the + * device, this will hit the board file, if any and get + * the GPIO from there. + */ + gpiod = devm_gpiod_get_index(dev, NULL, idx, GPIOD_OUT_LOW); + if (!IS_ERR(gpiod)) { + gpiod_set_consumer_name(gpiod, template->name); + return gpiod; + } + if (PTR_ERR(gpiod) != -ENOENT) + return gpiod; + + /* + * This is the legacy code path for platform code that + * still uses GPIO numbers. Ultimately we would like to get + * rid of this block completely. + */ + + /* skip leds that aren't available */ + if (!gpio_is_valid(template->gpio)) + return ERR_PTR(-ENOENT); + + if (template->active_low) + flags |= GPIOF_ACTIVE_LOW; + + ret = devm_gpio_request_one(dev, template->gpio, flags, + template->name); + if (ret < 0) + return ERR_PTR(ret); + + gpiod = gpio_to_desc(template->gpio); + if (!gpiod) + return ERR_PTR(-EINVAL); + + return gpiod; +} + +static int gpio_led_probe(struct platform_device *pdev) +{ + struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct gpio_leds_priv *priv; + int i, ret = 0; + + if (pdata && pdata->num_leds) { + priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, pdata->num_leds), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->num_leds = pdata->num_leds; + for (i = 0; i < priv->num_leds; i++) { + const struct gpio_led *template = &pdata->leds[i]; + struct gpio_led_data *led_dat = &priv->leds[i]; + + if (template->gpiod) + led_dat->gpiod = template->gpiod; + else + led_dat->gpiod = + gpio_led_get_gpiod(&pdev->dev, + i, template); + if (IS_ERR(led_dat->gpiod)) { + dev_info(&pdev->dev, "Skipping unavailable LED gpio %d (%s)\n", + template->gpio, template->name); + continue; + } + + ret = create_gpio_led(template, led_dat, + &pdev->dev, NULL, + pdata->gpio_blink_set); + if (ret < 0) + return ret; + } + } else { + priv = gpio_leds_create(pdev); + if (IS_ERR(priv)) + return PTR_ERR(priv); + } + + platform_set_drvdata(pdev, priv); + + return 0; +} + +static void gpio_led_shutdown(struct platform_device *pdev) +{ + struct gpio_leds_priv *priv = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < priv->num_leds; i++) { + struct gpio_led_data *led = &priv->leds[i]; + + if (!(led->cdev.flags & LED_RETAIN_AT_SHUTDOWN)) + gpio_led_set(&led->cdev, LED_OFF); + } +} + +static struct platform_driver gpio_led_driver = { + .probe = gpio_led_probe, + .shutdown = gpio_led_shutdown, + .driver = { + .name = "leds-gpio", + .of_match_table = of_gpio_leds_match, + }, +}; + +module_platform_driver(gpio_led_driver); + +MODULE_AUTHOR("Raphael Assenat , Trent Piepho "); +MODULE_DESCRIPTION("GPIO LED driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:leds-gpio"); -- cgit v1.2.3