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/iio/adc/lpc18xx_adc.c | 206 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 206 insertions(+) create mode 100644 drivers/iio/adc/lpc18xx_adc.c (limited to 'drivers/iio/adc/lpc18xx_adc.c') diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c new file mode 100644 index 000000000..450a243d1 --- /dev/null +++ b/drivers/iio/adc/lpc18xx_adc.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * IIO ADC driver for NXP LPC18xx ADC + * + * Copyright (C) 2016 Joachim Eastwood + * + * UNSUPPORTED hardware features: + * - Hardware triggers + * - Burst mode + * - Interrupts + * - DMA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* LPC18XX ADC registers and bits */ +#define LPC18XX_ADC_CR 0x000 +#define LPC18XX_ADC_CR_CLKDIV_SHIFT 8 +#define LPC18XX_ADC_CR_PDN BIT(21) +#define LPC18XX_ADC_CR_START_NOW (0x1 << 24) +#define LPC18XX_ADC_GDR 0x004 + +/* Data register bits */ +#define LPC18XX_ADC_SAMPLE_SHIFT 6 +#define LPC18XX_ADC_SAMPLE_MASK 0x3ff +#define LPC18XX_ADC_CONV_DONE BIT(31) + +/* Clock should be 4.5 MHz or less */ +#define LPC18XX_ADC_CLK_TARGET 4500000 + +struct lpc18xx_adc { + struct regulator *vref; + void __iomem *base; + struct device *dev; + struct mutex lock; + struct clk *clk; + u32 cr_reg; +}; + +#define LPC18XX_ADC_CHAN(_idx) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = _idx, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +} + +static const struct iio_chan_spec lpc18xx_adc_iio_channels[] = { + LPC18XX_ADC_CHAN(0), + LPC18XX_ADC_CHAN(1), + LPC18XX_ADC_CHAN(2), + LPC18XX_ADC_CHAN(3), + LPC18XX_ADC_CHAN(4), + LPC18XX_ADC_CHAN(5), + LPC18XX_ADC_CHAN(6), + LPC18XX_ADC_CHAN(7), +}; + +static int lpc18xx_adc_read_chan(struct lpc18xx_adc *adc, unsigned int ch) +{ + int ret; + u32 reg; + + reg = adc->cr_reg | BIT(ch) | LPC18XX_ADC_CR_START_NOW; + writel(reg, adc->base + LPC18XX_ADC_CR); + + ret = readl_poll_timeout(adc->base + LPC18XX_ADC_GDR, reg, + reg & LPC18XX_ADC_CONV_DONE, 3, 9); + if (ret) { + dev_warn(adc->dev, "adc read timed out\n"); + return ret; + } + + return (reg >> LPC18XX_ADC_SAMPLE_SHIFT) & LPC18XX_ADC_SAMPLE_MASK; +} + +static int lpc18xx_adc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct lpc18xx_adc *adc = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&adc->lock); + *val = lpc18xx_adc_read_chan(adc, chan->channel); + mutex_unlock(&adc->lock); + if (*val < 0) + return *val; + + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + *val = regulator_get_voltage(adc->vref) / 1000; + *val2 = 10; + + return IIO_VAL_FRACTIONAL_LOG2; + } + + return -EINVAL; +} + +static const struct iio_info lpc18xx_adc_info = { + .read_raw = lpc18xx_adc_read_raw, +}; + +static void lpc18xx_clear_cr_reg(void *data) +{ + struct lpc18xx_adc *adc = data; + + writel(0, adc->base + LPC18XX_ADC_CR); +} + +static void lpc18xx_regulator_disable(void *vref) +{ + regulator_disable(vref); +} + +static int lpc18xx_adc_probe(struct platform_device *pdev) +{ + struct iio_dev *indio_dev; + struct lpc18xx_adc *adc; + unsigned int clkdiv; + unsigned long rate; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc)); + if (!indio_dev) + return -ENOMEM; + + adc = iio_priv(indio_dev); + adc->dev = &pdev->dev; + mutex_init(&adc->lock); + + adc->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(adc->base)) + return PTR_ERR(adc->base); + + adc->clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(adc->clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(adc->clk), + "error getting clock\n"); + + adc->vref = devm_regulator_get(&pdev->dev, "vref"); + if (IS_ERR(adc->vref)) + return dev_err_probe(&pdev->dev, PTR_ERR(adc->vref), + "error getting regulator\n"); + + indio_dev->name = dev_name(&pdev->dev); + indio_dev->info = &lpc18xx_adc_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = lpc18xx_adc_iio_channels; + indio_dev->num_channels = ARRAY_SIZE(lpc18xx_adc_iio_channels); + + ret = regulator_enable(adc->vref); + if (ret) { + dev_err(&pdev->dev, "unable to enable regulator\n"); + return ret; + } + + ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_regulator_disable, adc->vref); + if (ret) + return ret; + + rate = clk_get_rate(adc->clk); + clkdiv = DIV_ROUND_UP(rate, LPC18XX_ADC_CLK_TARGET); + + adc->cr_reg = (clkdiv << LPC18XX_ADC_CR_CLKDIV_SHIFT) | + LPC18XX_ADC_CR_PDN; + writel(adc->cr_reg, adc->base + LPC18XX_ADC_CR); + + ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_clear_cr_reg, adc); + if (ret) + return ret; + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static const struct of_device_id lpc18xx_adc_match[] = { + { .compatible = "nxp,lpc1850-adc" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, lpc18xx_adc_match); + +static struct platform_driver lpc18xx_adc_driver = { + .probe = lpc18xx_adc_probe, + .driver = { + .name = "lpc18xx-adc", + .of_match_table = lpc18xx_adc_match, + }, +}; +module_platform_driver(lpc18xx_adc_driver); + +MODULE_DESCRIPTION("LPC18xx ADC driver"); +MODULE_AUTHOR("Joachim Eastwood "); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3