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/misc/apds9802als.c | 308 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 308 insertions(+) create mode 100644 drivers/misc/apds9802als.c (limited to 'drivers/misc/apds9802als.c') diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c new file mode 100644 index 000000000..0526c55d5 --- /dev/null +++ b/drivers/misc/apds9802als.c @@ -0,0 +1,308 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * apds9802als.c - apds9802 ALS Driver + * + * Copyright (C) 2009 Intel Corp + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define ALS_MIN_RANGE_VAL 1 +#define ALS_MAX_RANGE_VAL 2 +#define POWER_STA_ENABLE 1 +#define POWER_STA_DISABLE 0 + +#define DRIVER_NAME "apds9802als" + +struct als_data { + struct mutex mutex; +}; + +static ssize_t als_sensing_range_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + int val; + + val = i2c_smbus_read_byte_data(client, 0x81); + if (val < 0) + return val; + if (val & 1) + return sprintf(buf, "4095\n"); + else + return sprintf(buf, "65535\n"); +} + +static int als_wait_for_data_ready(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + int ret; + int retry = 10; + + do { + msleep(30); + ret = i2c_smbus_read_byte_data(client, 0x86); + } while (!(ret & 0x80) && retry--); + + if (retry < 0) { + dev_warn(dev, "timeout waiting for data ready\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static ssize_t als_lux0_input_data_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct als_data *data = i2c_get_clientdata(client); + int ret_val; + int temp; + + /* Protect against parallel reads */ + pm_runtime_get_sync(dev); + mutex_lock(&data->mutex); + + /* clear EOC interrupt status */ + i2c_smbus_write_byte(client, 0x40); + /* start measurement */ + temp = i2c_smbus_read_byte_data(client, 0x81); + i2c_smbus_write_byte_data(client, 0x81, temp | 0x08); + + ret_val = als_wait_for_data_ready(dev); + if (ret_val < 0) + goto failed; + + temp = i2c_smbus_read_byte_data(client, 0x8C); /* LSB data */ + if (temp < 0) { + ret_val = temp; + goto failed; + } + ret_val = i2c_smbus_read_byte_data(client, 0x8D); /* MSB data */ + if (ret_val < 0) + goto failed; + + mutex_unlock(&data->mutex); + pm_runtime_put_sync(dev); + + temp = (ret_val << 8) | temp; + return sprintf(buf, "%d\n", temp); +failed: + mutex_unlock(&data->mutex); + pm_runtime_put_sync(dev); + return ret_val; +} + +static ssize_t als_sensing_range_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct als_data *data = i2c_get_clientdata(client); + int ret_val; + unsigned long val; + + ret_val = kstrtoul(buf, 10, &val); + if (ret_val) + return ret_val; + + if (val < 4096) + val = 1; + else if (val < 65536) + val = 2; + else + return -ERANGE; + + pm_runtime_get_sync(dev); + + /* Make sure nobody else reads/modifies/writes 0x81 while we + are active */ + mutex_lock(&data->mutex); + + ret_val = i2c_smbus_read_byte_data(client, 0x81); + if (ret_val < 0) + goto fail; + + /* Reset the bits before setting them */ + ret_val = ret_val & 0xFA; + + if (val == 1) /* Setting detection range up to 4k LUX */ + ret_val = (ret_val | 0x01); + else /* Setting detection range up to 64k LUX*/ + ret_val = (ret_val | 0x00); + + ret_val = i2c_smbus_write_byte_data(client, 0x81, ret_val); + + if (ret_val >= 0) { + /* All OK */ + mutex_unlock(&data->mutex); + pm_runtime_put_sync(dev); + return count; + } +fail: + mutex_unlock(&data->mutex); + pm_runtime_put_sync(dev); + return ret_val; +} + +static int als_set_power_state(struct i2c_client *client, bool on_off) +{ + int ret_val; + struct als_data *data = i2c_get_clientdata(client); + + mutex_lock(&data->mutex); + ret_val = i2c_smbus_read_byte_data(client, 0x80); + if (ret_val < 0) + goto fail; + if (on_off) + ret_val = ret_val | 0x01; + else + ret_val = ret_val & 0xFE; + ret_val = i2c_smbus_write_byte_data(client, 0x80, ret_val); +fail: + mutex_unlock(&data->mutex); + return ret_val; +} + +static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR, + als_sensing_range_show, als_sensing_range_store); +static DEVICE_ATTR(lux0_input, S_IRUGO, als_lux0_input_data_show, NULL); + +static struct attribute *mid_att_als[] = { + &dev_attr_lux0_sensor_range.attr, + &dev_attr_lux0_input.attr, + NULL +}; + +static const struct attribute_group m_als_gr = { + .name = "apds9802als", + .attrs = mid_att_als +}; + +static int als_set_default_config(struct i2c_client *client) +{ + int ret_val; + /* Write the command and then switch on */ + ret_val = i2c_smbus_write_byte_data(client, 0x80, 0x01); + if (ret_val < 0) { + dev_err(&client->dev, "failed default switch on write\n"); + return ret_val; + } + /* detection range: 1~64K Lux, maunal measurement */ + ret_val = i2c_smbus_write_byte_data(client, 0x81, 0x08); + if (ret_val < 0) + dev_err(&client->dev, "failed default LUX on write\n"); + + /* We always get 0 for the 1st measurement after system power on, + * so make sure it is finished before user asks for data. + */ + als_wait_for_data_ready(&client->dev); + + return ret_val; +} + +static int apds9802als_probe(struct i2c_client *client) +{ + int res; + struct als_data *data; + + data = kzalloc(sizeof(struct als_data), GFP_KERNEL); + if (data == NULL) { + dev_err(&client->dev, "Memory allocation failed\n"); + return -ENOMEM; + } + i2c_set_clientdata(client, data); + res = sysfs_create_group(&client->dev.kobj, &m_als_gr); + if (res) { + dev_err(&client->dev, "device create file failed\n"); + goto als_error1; + } + dev_info(&client->dev, "ALS chip found\n"); + als_set_default_config(client); + mutex_init(&data->mutex); + + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); + + return res; +als_error1: + kfree(data); + return res; +} + +static void apds9802als_remove(struct i2c_client *client) +{ + struct als_data *data = i2c_get_clientdata(client); + + pm_runtime_get_sync(&client->dev); + + als_set_power_state(client, false); + sysfs_remove_group(&client->dev.kobj, &m_als_gr); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + kfree(data); +} + +#ifdef CONFIG_PM + +static int apds9802als_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + als_set_power_state(client, false); + return 0; +} + +static int apds9802als_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + als_set_power_state(client, true); + return 0; +} + +static UNIVERSAL_DEV_PM_OPS(apds9802als_pm_ops, apds9802als_suspend, + apds9802als_resume, NULL); + +#define APDS9802ALS_PM_OPS (&apds9802als_pm_ops) + +#else /* CONFIG_PM */ +#define APDS9802ALS_PM_OPS NULL +#endif /* CONFIG_PM */ + +static const struct i2c_device_id apds9802als_id[] = { + { DRIVER_NAME, 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, apds9802als_id); + +static struct i2c_driver apds9802als_driver = { + .driver = { + .name = DRIVER_NAME, + .pm = APDS9802ALS_PM_OPS, + }, + .probe_new = apds9802als_probe, + .remove = apds9802als_remove, + .id_table = apds9802als_id, +}; + +module_i2c_driver(apds9802als_driver); + +MODULE_AUTHOR("Anantha Narayanan