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-is31fl319x.c | 609 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 609 insertions(+) create mode 100644 drivers/leds/leds-is31fl319x.c (limited to 'drivers/leds/leds-is31fl319x.c') diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c new file mode 100644 index 000000000..b2f4c4ec7 --- /dev/null +++ b/drivers/leds/leds-is31fl319x.c @@ -0,0 +1,609 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2015-16 Golden Delicious Computers + * + * Author: Nikolaus Schaller + * + * LED driver for the IS31FL319{0,1,3,6,9} to drive 1, 3, 6 or 9 light + * effect LEDs. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* register numbers */ +#define IS31FL319X_SHUTDOWN 0x00 + +/* registers for 3190, 3191 and 3193 */ +#define IS31FL3190_BREATHING 0x01 +#define IS31FL3190_LEDMODE 0x02 +#define IS31FL3190_CURRENT 0x03 +#define IS31FL3190_PWM(channel) (0x04 + channel) +#define IS31FL3190_DATA_UPDATE 0x07 +#define IS31FL3190_T0(channel) (0x0a + channel) +#define IS31FL3190_T1T2(channel) (0x10 + channel) +#define IS31FL3190_T3T4(channel) (0x16 + channel) +#define IS31FL3190_TIME_UPDATE 0x1c +#define IS31FL3190_LEDCONTROL 0x1d +#define IS31FL3190_RESET 0x2f + +#define IS31FL3190_CURRENT_uA_MIN 5000 +#define IS31FL3190_CURRENT_uA_DEFAULT 42000 +#define IS31FL3190_CURRENT_uA_MAX 42000 +#define IS31FL3190_CURRENT_SHIFT 2 +#define IS31FL3190_CURRENT_MASK GENMASK(4, 2) +#define IS31FL3190_CURRENT_5_mA 0x02 +#define IS31FL3190_CURRENT_10_mA 0x01 +#define IS31FL3190_CURRENT_17dot5_mA 0x04 +#define IS31FL3190_CURRENT_30_mA 0x03 +#define IS31FL3190_CURRENT_42_mA 0x00 + +/* registers for 3196 and 3199 */ +#define IS31FL3196_CTRL1 0x01 +#define IS31FL3196_CTRL2 0x02 +#define IS31FL3196_CONFIG1 0x03 +#define IS31FL3196_CONFIG2 0x04 +#define IS31FL3196_RAMP_MODE 0x05 +#define IS31FL3196_BREATH_MARK 0x06 +#define IS31FL3196_PWM(channel) (0x07 + channel) +#define IS31FL3196_DATA_UPDATE 0x10 +#define IS31FL3196_T0(channel) (0x11 + channel) +#define IS31FL3196_T123_1 0x1a +#define IS31FL3196_T123_2 0x1b +#define IS31FL3196_T123_3 0x1c +#define IS31FL3196_T4(channel) (0x1d + channel) +#define IS31FL3196_TIME_UPDATE 0x26 +#define IS31FL3196_RESET 0xff + +#define IS31FL3196_REG_CNT (IS31FL3196_RESET + 1) + +#define IS31FL319X_MAX_LEDS 9 + +/* CS (Current Setting) in CONFIG2 register */ +#define IS31FL3196_CONFIG2_CS_SHIFT 4 +#define IS31FL3196_CONFIG2_CS_MASK GENMASK(2, 0) +#define IS31FL3196_CONFIG2_CS_STEP_REF 12 + +#define IS31FL3196_CURRENT_uA_MIN 5000 +#define IS31FL3196_CURRENT_uA_MAX 40000 +#define IS31FL3196_CURRENT_uA_STEP 5000 +#define IS31FL3196_CURRENT_uA_DEFAULT 20000 + +/* Audio gain in CONFIG2 register */ +#define IS31FL3196_AUDIO_GAIN_DB_MAX ((u32)21) +#define IS31FL3196_AUDIO_GAIN_DB_STEP 3 + +/* + * regmap is used as a cache of chip's register space, + * to avoid reading back brightness values from chip, + * which is known to hang. + */ +struct is31fl319x_chip { + const struct is31fl319x_chipdef *cdef; + struct i2c_client *client; + struct gpio_desc *shutdown_gpio; + struct regmap *regmap; + struct mutex lock; + u32 audio_gain_db; + + struct is31fl319x_led { + struct is31fl319x_chip *chip; + struct led_classdev cdev; + u32 max_microamp; + bool configured; + } leds[IS31FL319X_MAX_LEDS]; +}; + +struct is31fl319x_chipdef { + int num_leds; + u8 reset_reg; + const struct regmap_config *is31fl319x_regmap_config; + int (*brightness_set)(struct led_classdev *cdev, enum led_brightness brightness); + u32 current_default; + u32 current_min; + u32 current_max; + bool is_3196or3199; +}; + +static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg) +{ + /* we have no readable registers */ + return false; +} + +static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg) +{ + /* volatile registers are not cached */ + switch (reg) { + case IS31FL3190_DATA_UPDATE: + case IS31FL3190_TIME_UPDATE: + case IS31FL3190_RESET: + return true; /* always write-through */ + default: + return false; + } +} + +static const struct reg_default is31fl3190_reg_defaults[] = { + { IS31FL3190_LEDMODE, 0x00 }, + { IS31FL3190_CURRENT, 0x00 }, + { IS31FL3190_PWM(0), 0x00 }, + { IS31FL3190_PWM(1), 0x00 }, + { IS31FL3190_PWM(2), 0x00 }, +}; + +static struct regmap_config is31fl3190_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = IS31FL3190_RESET, + .cache_type = REGCACHE_FLAT, + .readable_reg = is31fl319x_readable_reg, + .volatile_reg = is31fl3190_volatile_reg, + .reg_defaults = is31fl3190_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults), +}; + +static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg) +{ + /* volatile registers are not cached */ + switch (reg) { + case IS31FL3196_DATA_UPDATE: + case IS31FL3196_TIME_UPDATE: + case IS31FL3196_RESET: + return true; /* always write-through */ + default: + return false; + } +} + +static const struct reg_default is31fl3196_reg_defaults[] = { + { IS31FL3196_CONFIG1, 0x00 }, + { IS31FL3196_CONFIG2, 0x00 }, + { IS31FL3196_PWM(0), 0x00 }, + { IS31FL3196_PWM(1), 0x00 }, + { IS31FL3196_PWM(2), 0x00 }, + { IS31FL3196_PWM(3), 0x00 }, + { IS31FL3196_PWM(4), 0x00 }, + { IS31FL3196_PWM(5), 0x00 }, + { IS31FL3196_PWM(6), 0x00 }, + { IS31FL3196_PWM(7), 0x00 }, + { IS31FL3196_PWM(8), 0x00 }, +}; + +static struct regmap_config is31fl3196_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = IS31FL3196_REG_CNT, + .cache_type = REGCACHE_FLAT, + .readable_reg = is31fl319x_readable_reg, + .volatile_reg = is31fl3196_volatile_reg, + .reg_defaults = is31fl3196_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults), +}; + +static int is31fl3190_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev); + struct is31fl319x_chip *is31 = led->chip; + int chan = led - is31->leds; + int ret; + int i; + u8 ctrl = 0; + + dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness); + + mutex_lock(&is31->lock); + + /* update PWM register */ + ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness); + if (ret < 0) + goto out; + + /* read current brightness of all PWM channels */ + for (i = 0; i < is31->cdef->num_leds; i++) { + unsigned int pwm_value; + bool on; + + /* + * since neither cdev nor the chip can provide + * the current setting, we read from the regmap cache + */ + + ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value); + on = ret >= 0 && pwm_value > LED_OFF; + + ctrl |= on << i; + } + + if (ctrl > 0) { + dev_dbg(&is31->client->dev, "power up %02x\n", ctrl); + regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl); + /* update PWMs */ + regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00); + /* enable chip from shut down and enable all channels */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20); + } else { + dev_dbg(&is31->client->dev, "power down\n"); + /* shut down (no need to clear LEDCONTROL) */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01); + } + +out: + mutex_unlock(&is31->lock); + + return ret; +} + +static int is31fl3196_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev); + struct is31fl319x_chip *is31 = led->chip; + int chan = led - is31->leds; + int ret; + int i; + u8 ctrl1 = 0, ctrl2 = 0; + + dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness); + + mutex_lock(&is31->lock); + + /* update PWM register */ + ret = regmap_write(is31->regmap, IS31FL3196_PWM(chan), brightness); + if (ret < 0) + goto out; + + /* read current brightness of all PWM channels */ + for (i = 0; i < is31->cdef->num_leds; i++) { + unsigned int pwm_value; + bool on; + + /* + * since neither cdev nor the chip can provide + * the current setting, we read from the regmap cache + */ + + ret = regmap_read(is31->regmap, IS31FL3196_PWM(i), &pwm_value); + on = ret >= 0 && pwm_value > LED_OFF; + + if (i < 3) + ctrl1 |= on << i; /* 0..2 => bit 0..2 */ + else if (i < 6) + ctrl1 |= on << (i + 1); /* 3..5 => bit 4..6 */ + else + ctrl2 |= on << (i - 6); /* 6..8 => bit 0..2 */ + } + + if (ctrl1 > 0 || ctrl2 > 0) { + dev_dbg(&is31->client->dev, "power up %02x %02x\n", + ctrl1, ctrl2); + regmap_write(is31->regmap, IS31FL3196_CTRL1, ctrl1); + regmap_write(is31->regmap, IS31FL3196_CTRL2, ctrl2); + /* update PWMs */ + regmap_write(is31->regmap, IS31FL3196_DATA_UPDATE, 0x00); + /* enable chip from shut down */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01); + } else { + dev_dbg(&is31->client->dev, "power down\n"); + /* shut down (no need to clear CTRL1/2) */ + ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x00); + } + +out: + mutex_unlock(&is31->lock); + + return ret; +} + +static const struct is31fl319x_chipdef is31fl3190_cdef = { + .num_leds = 1, + .reset_reg = IS31FL3190_RESET, + .is31fl319x_regmap_config = &is31fl3190_regmap_config, + .brightness_set = is31fl3190_brightness_set, + .current_default = IS31FL3190_CURRENT_uA_DEFAULT, + .current_min = IS31FL3190_CURRENT_uA_MIN, + .current_max = IS31FL3190_CURRENT_uA_MAX, + .is_3196or3199 = false, +}; + +static const struct is31fl319x_chipdef is31fl3193_cdef = { + .num_leds = 3, + .reset_reg = IS31FL3190_RESET, + .is31fl319x_regmap_config = &is31fl3190_regmap_config, + .brightness_set = is31fl3190_brightness_set, + .current_default = IS31FL3190_CURRENT_uA_DEFAULT, + .current_min = IS31FL3190_CURRENT_uA_MIN, + .current_max = IS31FL3190_CURRENT_uA_MAX, + .is_3196or3199 = false, +}; + +static const struct is31fl319x_chipdef is31fl3196_cdef = { + .num_leds = 6, + .reset_reg = IS31FL3196_RESET, + .is31fl319x_regmap_config = &is31fl3196_regmap_config, + .brightness_set = is31fl3196_brightness_set, + .current_default = IS31FL3196_CURRENT_uA_DEFAULT, + .current_min = IS31FL3196_CURRENT_uA_MIN, + .current_max = IS31FL3196_CURRENT_uA_MAX, + .is_3196or3199 = true, +}; + +static const struct is31fl319x_chipdef is31fl3199_cdef = { + .num_leds = 9, + .reset_reg = IS31FL3196_RESET, + .is31fl319x_regmap_config = &is31fl3196_regmap_config, + .brightness_set = is31fl3196_brightness_set, + .current_default = IS31FL3196_CURRENT_uA_DEFAULT, + .current_min = IS31FL3196_CURRENT_uA_MIN, + .current_max = IS31FL3196_CURRENT_uA_MAX, + .is_3196or3199 = true, +}; + +static const struct of_device_id of_is31fl319x_match[] = { + { .compatible = "issi,is31fl3190", .data = &is31fl3190_cdef, }, + { .compatible = "issi,is31fl3191", .data = &is31fl3190_cdef, }, + { .compatible = "issi,is31fl3193", .data = &is31fl3193_cdef, }, + { .compatible = "issi,is31fl3196", .data = &is31fl3196_cdef, }, + { .compatible = "issi,is31fl3199", .data = &is31fl3199_cdef, }, + { .compatible = "si-en,sn3190", .data = &is31fl3190_cdef, }, + { .compatible = "si-en,sn3191", .data = &is31fl3190_cdef, }, + { .compatible = "si-en,sn3193", .data = &is31fl3193_cdef, }, + { .compatible = "si-en,sn3196", .data = &is31fl3196_cdef, }, + { .compatible = "si-en,sn3199", .data = &is31fl3199_cdef, }, + { } +}; +MODULE_DEVICE_TABLE(of, of_is31fl319x_match); + +static int is31fl319x_parse_child_fw(const struct device *dev, + const struct fwnode_handle *child, + struct is31fl319x_led *led, + struct is31fl319x_chip *is31) +{ + struct led_classdev *cdev = &led->cdev; + int ret; + + if (fwnode_property_read_string(child, "label", &cdev->name)) + cdev->name = fwnode_get_name(child); + + ret = fwnode_property_read_string(child, "linux,default-trigger", &cdev->default_trigger); + if (ret < 0 && ret != -EINVAL) /* is optional */ + return ret; + + led->max_microamp = is31->cdef->current_default; + ret = fwnode_property_read_u32(child, "led-max-microamp", &led->max_microamp); + if (!ret) { + if (led->max_microamp < is31->cdef->current_min) + return -EINVAL; /* not supported */ + led->max_microamp = min(led->max_microamp, + is31->cdef->current_max); + } + + return 0; +} + +static int is31fl319x_parse_fw(struct device *dev, struct is31fl319x_chip *is31) +{ + struct fwnode_handle *fwnode = dev_fwnode(dev), *child; + int count; + int ret; + + is31->shutdown_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); + if (IS_ERR(is31->shutdown_gpio)) + return dev_err_probe(dev, PTR_ERR(is31->shutdown_gpio), + "Failed to get shutdown gpio\n"); + + is31->cdef = device_get_match_data(dev); + + count = 0; + fwnode_for_each_available_child_node(fwnode, child) + count++; + + dev_dbg(dev, "probing with %d leds defined in DT\n", count); + + if (!count || count > is31->cdef->num_leds) + return dev_err_probe(dev, -ENODEV, + "Number of leds defined must be between 1 and %u\n", + is31->cdef->num_leds); + + fwnode_for_each_available_child_node(fwnode, child) { + struct is31fl319x_led *led; + u32 reg; + + ret = fwnode_property_read_u32(child, "reg", ®); + if (ret) { + ret = dev_err_probe(dev, ret, "Failed to read led 'reg' property\n"); + goto put_child_node; + } + + if (reg < 1 || reg > is31->cdef->num_leds) { + ret = dev_err_probe(dev, -EINVAL, "invalid led reg %u\n", reg); + goto put_child_node; + } + + led = &is31->leds[reg - 1]; + + if (led->configured) { + ret = dev_err_probe(dev, -EINVAL, "led %u is already configured\n", reg); + goto put_child_node; + } + + ret = is31fl319x_parse_child_fw(dev, child, led, is31); + if (ret) { + ret = dev_err_probe(dev, ret, "led %u DT parsing failed\n", reg); + goto put_child_node; + } + + led->configured = true; + } + + is31->audio_gain_db = 0; + if (is31->cdef->is_3196or3199) { + ret = fwnode_property_read_u32(fwnode, "audio-gain-db", &is31->audio_gain_db); + if (!ret) + is31->audio_gain_db = min(is31->audio_gain_db, + IS31FL3196_AUDIO_GAIN_DB_MAX); + } + + return 0; + +put_child_node: + fwnode_handle_put(child); + return ret; +} + +static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp) +{ + switch (microamp) { + case 5000: + return IS31FL3190_CURRENT_5_mA; + case 10000: + return IS31FL3190_CURRENT_10_mA; + case 17500: + return IS31FL3190_CURRENT_17dot5_mA; + case 30000: + return IS31FL3190_CURRENT_30_mA; + case 42000: + return IS31FL3190_CURRENT_42_mA; + default: + dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp); + return IS31FL3190_CURRENT_5_mA; + } +} + +static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp) +{ + /* round down to nearest supported value (range check done by caller) */ + u32 step = microamp / IS31FL3196_CURRENT_uA_STEP; + + return ((IS31FL3196_CONFIG2_CS_STEP_REF - step) & + IS31FL3196_CONFIG2_CS_MASK) << + IS31FL3196_CONFIG2_CS_SHIFT; /* CS encoding */ +} + +static inline int is31fl3196_db_to_gain(u32 dezibel) +{ + /* round down to nearest supported value (range check done by caller) */ + return dezibel / IS31FL3196_AUDIO_GAIN_DB_STEP; +} + +static int is31fl319x_probe(struct i2c_client *client) +{ + struct is31fl319x_chip *is31; + struct device *dev = &client->dev; + int err; + int i = 0; + u32 aggregated_led_microamp; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -EIO; + + is31 = devm_kzalloc(&client->dev, sizeof(*is31), GFP_KERNEL); + if (!is31) + return -ENOMEM; + + mutex_init(&is31->lock); + err = devm_add_action(dev, (void (*)(void *))mutex_destroy, &is31->lock); + if (err) + return err; + + err = is31fl319x_parse_fw(&client->dev, is31); + if (err) + return err; + + if (is31->shutdown_gpio) { + gpiod_direction_output(is31->shutdown_gpio, 0); + mdelay(5); + gpiod_direction_output(is31->shutdown_gpio, 1); + } + + is31->client = client; + is31->regmap = devm_regmap_init_i2c(client, is31->cdef->is31fl319x_regmap_config); + if (IS_ERR(is31->regmap)) + return dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n"); + + i2c_set_clientdata(client, is31); + + /* check for write-reply from chip (we can't read any registers) */ + err = regmap_write(is31->regmap, is31->cdef->reset_reg, 0x00); + if (err < 0) + return dev_err_probe(dev, err, "no response from chip write\n"); + + /* + * Kernel conventions require per-LED led-max-microamp property. + * But the chip does not allow to limit individual LEDs. + * So we take minimum from all subnodes for safety of hardware. + */ + aggregated_led_microamp = is31->cdef->current_max; + for (i = 0; i < is31->cdef->num_leds; i++) + if (is31->leds[i].configured && + is31->leds[i].max_microamp < aggregated_led_microamp) + aggregated_led_microamp = is31->leds[i].max_microamp; + + if (is31->cdef->is_3196or3199) + regmap_write(is31->regmap, IS31FL3196_CONFIG2, + is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) | + is31fl3196_db_to_gain(is31->audio_gain_db)); + else + regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK, + is31fl3190_microamp_to_cs(dev, aggregated_led_microamp) << IS31FL3190_CURRENT_SHIFT); + + for (i = 0; i < is31->cdef->num_leds; i++) { + struct is31fl319x_led *led = &is31->leds[i]; + + if (!led->configured) + continue; + + led->chip = is31; + led->cdev.brightness_set_blocking = is31->cdef->brightness_set; + + err = devm_led_classdev_register(&client->dev, &led->cdev); + if (err < 0) + return err; + } + + return 0; +} + +/* + * i2c-core (and modalias) requires that id_table be properly filled, + * even though it is not used for DeviceTree based instantiation. + */ +static const struct i2c_device_id is31fl319x_id[] = { + { "is31fl3190" }, + { "is31fl3191" }, + { "is31fl3193" }, + { "is31fl3196" }, + { "is31fl3199" }, + { "sn3190" }, + { "sn3191" }, + { "sn3193" }, + { "sn3196" }, + { "sn3199" }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, is31fl319x_id); + +static struct i2c_driver is31fl319x_driver = { + .driver = { + .name = "leds-is31fl319x", + .of_match_table = of_is31fl319x_match, + }, + .probe_new = is31fl319x_probe, + .id_table = is31fl319x_id, +}; + +module_i2c_driver(is31fl319x_driver); + +MODULE_AUTHOR("H. Nikolaus Schaller "); +MODULE_AUTHOR("Andrey Utkin "); +MODULE_DESCRIPTION("IS31FL319X LED driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3