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/rt6245-regulator.c | 254 +++++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 drivers/regulator/rt6245-regulator.c (limited to 'drivers/regulator/rt6245-regulator.c') diff --git a/drivers/regulator/rt6245-regulator.c b/drivers/regulator/rt6245-regulator.c new file mode 100644 index 000000000..cb22a207e --- /dev/null +++ b/drivers/regulator/rt6245-regulator.c @@ -0,0 +1,254 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RT6245_VIRT_OCLIMIT 0x00 +#define RT6245_VIRT_OTLEVEL 0x01 +#define RT6245_VIRT_PGDLYTIME 0x02 +#define RT6245_VIRT_SLEWRATE 0x03 +#define RT6245_VIRT_SWFREQ 0x04 +#define RT6245_VIRT_VOUT 0x05 + +#define RT6245_VOUT_MASK GENMASK(6, 0) +#define RT6245_SLEW_MASK GENMASK(2, 0) +#define RT6245_CHKSUM_MASK BIT(7) +#define RT6245_CODE_MASK GENMASK(6, 0) + +/* HW Enable + Soft start time */ +#define RT6245_ENTIME_IN_US 5000 + +#define RT6245_VOUT_MINUV 437500 +#define RT6245_VOUT_MAXUV 1387500 +#define RT6245_VOUT_STEPUV 12500 +#define RT6245_NUM_VOUT ((RT6245_VOUT_MAXUV - RT6245_VOUT_MINUV) / RT6245_VOUT_STEPUV + 1) + +struct rt6245_priv { + struct gpio_desc *enable_gpio; + bool enable_state; +}; + +static int rt6245_enable(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + struct regmap *regmap = rdev_get_regmap(rdev); + int ret; + + if (!priv->enable_gpio) + return 0; + + gpiod_direction_output(priv->enable_gpio, 1); + usleep_range(RT6245_ENTIME_IN_US, RT6245_ENTIME_IN_US + 1000); + + regcache_cache_only(regmap, false); + ret = regcache_sync(regmap); + if (ret) + return ret; + + priv->enable_state = true; + return 0; +} + +static int rt6245_disable(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + struct regmap *regmap = rdev_get_regmap(rdev); + + if (!priv->enable_gpio) + return -EINVAL; + + regcache_cache_only(regmap, true); + regcache_mark_dirty(regmap); + + gpiod_direction_output(priv->enable_gpio, 0); + + priv->enable_state = false; + return 0; +} + +static int rt6245_is_enabled(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + + return priv->enable_state ? 1 : 0; +} + +static const struct regulator_ops rt6245_regulator_ops = { + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_ramp_delay = regulator_set_ramp_delay_regmap, + .enable = rt6245_enable, + .disable = rt6245_disable, + .is_enabled = rt6245_is_enabled, +}; + +/* ramp delay dividend is 12500 uV/uS, and divisor from 1 to 8 */ +static const unsigned int rt6245_ramp_delay_table[] = { + 12500, 6250, 4167, 3125, 2500, 2083, 1786, 1562 +}; + +static const struct regulator_desc rt6245_regulator_desc = { + .name = "rt6245-regulator", + .ops = &rt6245_regulator_ops, + .type = REGULATOR_VOLTAGE, + .min_uV = RT6245_VOUT_MINUV, + .uV_step = RT6245_VOUT_STEPUV, + .n_voltages = RT6245_NUM_VOUT, + .ramp_delay_table = rt6245_ramp_delay_table, + .n_ramp_values = ARRAY_SIZE(rt6245_ramp_delay_table), + .owner = THIS_MODULE, + .vsel_reg = RT6245_VIRT_VOUT, + .vsel_mask = RT6245_VOUT_MASK, + .ramp_reg = RT6245_VIRT_SLEWRATE, + .ramp_mask = RT6245_SLEW_MASK, +}; + +static int rt6245_init_device_properties(struct device *dev) +{ + const struct { + const char *name; + unsigned int reg; + } rt6245_props[] = { + { "richtek,oc-level-select", RT6245_VIRT_OCLIMIT }, + { "richtek,ot-level-select", RT6245_VIRT_OTLEVEL }, + { "richtek,pgdly-time-select", RT6245_VIRT_PGDLYTIME }, + { "richtek,switch-freq-select", RT6245_VIRT_SWFREQ } + }; + struct regmap *regmap = dev_get_regmap(dev, NULL); + u8 propval; + int i, ret; + + for (i = 0; i < ARRAY_SIZE(rt6245_props); i++) { + ret = device_property_read_u8(dev, rt6245_props[i].name, &propval); + if (ret) + continue; + + ret = regmap_write(regmap, rt6245_props[i].reg, propval); + if (ret) { + dev_err(dev, "Fail to apply [%s:%d]\n", rt6245_props[i].name, propval); + return ret; + } + } + + return 0; +} + +static int rt6245_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct i2c_client *i2c = context; + static const u8 func_base[] = { 0x6F, 0x73, 0x78, 0x61, 0x7C, 0 }; + unsigned int code, bit_count; + + code = func_base[reg]; + code += val; + + /* xor checksum for bit 6 to 0 */ + bit_count = hweight8(code & RT6245_CODE_MASK); + if (bit_count % 2) + code |= RT6245_CHKSUM_MASK; + else + code &= ~RT6245_CHKSUM_MASK; + + return i2c_smbus_write_byte(i2c, code); +} + +static const struct reg_default rt6245_reg_defaults[] = { + /* Default over current 14A */ + { RT6245_VIRT_OCLIMIT, 2 }, + /* Default over temperature 150'c */ + { RT6245_VIRT_OTLEVEL, 0 }, + /* Default power good delay time 10us */ + { RT6245_VIRT_PGDLYTIME, 1 }, + /* Default slewrate 12.5mV/uS */ + { RT6245_VIRT_SLEWRATE, 0 }, + /* Default switch frequency 800KHz */ + { RT6245_VIRT_SWFREQ, 1 }, + /* Default voltage 750mV */ + { RT6245_VIRT_VOUT, 0x19 } +}; + +static const struct regmap_config rt6245_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RT6245_VIRT_VOUT, + .cache_type = REGCACHE_FLAT, + .reg_defaults = rt6245_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(rt6245_reg_defaults), + .reg_write = rt6245_reg_write, +}; + +static int rt6245_probe(struct i2c_client *i2c) +{ + struct rt6245_priv *priv; + struct regmap *regmap; + struct regulator_config regulator_cfg = {}; + struct regulator_dev *rdev; + int ret; + + priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->enable_state = true; + + priv->enable_gpio = devm_gpiod_get_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(priv->enable_gpio)) { + dev_err(&i2c->dev, "Failed to get 'enable' gpio\n"); + return PTR_ERR(priv->enable_gpio); + } + + usleep_range(RT6245_ENTIME_IN_US, RT6245_ENTIME_IN_US + 1000); + + regmap = devm_regmap_init(&i2c->dev, NULL, i2c, &rt6245_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&i2c->dev, "Failed to initialize the regmap\n"); + return PTR_ERR(regmap); + } + + ret = rt6245_init_device_properties(&i2c->dev); + if (ret) { + dev_err(&i2c->dev, "Failed to initialize device properties\n"); + return ret; + } + + regulator_cfg.dev = &i2c->dev; + regulator_cfg.of_node = i2c->dev.of_node; + regulator_cfg.regmap = regmap; + regulator_cfg.driver_data = priv; + regulator_cfg.init_data = of_get_regulator_init_data(&i2c->dev, i2c->dev.of_node, + &rt6245_regulator_desc); + rdev = devm_regulator_register(&i2c->dev, &rt6245_regulator_desc, ®ulator_cfg); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, "Failed to register regulator\n"); + return PTR_ERR(rdev); + } + + return 0; +} + +static const struct of_device_id __maybe_unused rt6245_of_match_table[] = { + { .compatible = "richtek,rt6245", }, + {} +}; +MODULE_DEVICE_TABLE(of, rt6245_of_match_table); + +static struct i2c_driver rt6245_driver = { + .driver = { + .name = "rt6245", + .of_match_table = rt6245_of_match_table, + }, + .probe_new = rt6245_probe, +}; +module_i2c_driver(rt6245_driver); + +MODULE_AUTHOR("ChiYuan Huang "); +MODULE_DESCRIPTION("Richtek RT6245 Regulator Driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3