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-lm3692x.c | 529 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 529 insertions(+) create mode 100644 drivers/leds/leds-lm3692x.c (limited to 'drivers/leds/leds-lm3692x.c') diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c new file mode 100644 index 000000000..54b4662bf --- /dev/null +++ b/drivers/leds/leds-lm3692x.c @@ -0,0 +1,529 @@ +// SPDX-License-Identifier: GPL-2.0 +// TI LM3692x LED chip family driver +// Copyright (C) 2017-18 Texas Instruments Incorporated - https://www.ti.com/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LM36922_MODEL 0 +#define LM36923_MODEL 1 + +#define LM3692X_REV 0x0 +#define LM3692X_RESET 0x1 +#define LM3692X_EN 0x10 +#define LM3692X_BRT_CTRL 0x11 +#define LM3692X_PWM_CTRL 0x12 +#define LM3692X_BOOST_CTRL 0x13 +#define LM3692X_AUTO_FREQ_HI 0x15 +#define LM3692X_AUTO_FREQ_LO 0x16 +#define LM3692X_BL_ADJ_THRESH 0x17 +#define LM3692X_BRT_LSB 0x18 +#define LM3692X_BRT_MSB 0x19 +#define LM3692X_FAULT_CTRL 0x1e +#define LM3692X_FAULT_FLAGS 0x1f + +#define LM3692X_SW_RESET BIT(0) +#define LM3692X_DEVICE_EN BIT(0) +#define LM3692X_LED1_EN BIT(1) +#define LM3692X_LED2_EN BIT(2) +#define LM36923_LED3_EN BIT(3) +#define LM3692X_ENABLE_MASK (LM3692X_DEVICE_EN | LM3692X_LED1_EN | \ + LM3692X_LED2_EN | LM36923_LED3_EN) + +/* Brightness Control Bits */ +#define LM3692X_BL_ADJ_POL BIT(0) +#define LM3692X_RAMP_RATE_125us 0x00 +#define LM3692X_RAMP_RATE_250us BIT(1) +#define LM3692X_RAMP_RATE_500us BIT(2) +#define LM3692X_RAMP_RATE_1ms (BIT(1) | BIT(2)) +#define LM3692X_RAMP_RATE_2ms BIT(3) +#define LM3692X_RAMP_RATE_4ms (BIT(3) | BIT(1)) +#define LM3692X_RAMP_RATE_8ms (BIT(2) | BIT(3)) +#define LM3692X_RAMP_RATE_16ms (BIT(1) | BIT(2) | BIT(3)) +#define LM3692X_RAMP_EN BIT(4) +#define LM3692X_BRHT_MODE_REG 0x00 +#define LM3692X_BRHT_MODE_PWM BIT(5) +#define LM3692X_BRHT_MODE_MULTI_RAMP BIT(6) +#define LM3692X_BRHT_MODE_RAMP_MULTI (BIT(5) | BIT(6)) +#define LM3692X_MAP_MODE_EXP BIT(7) + +/* PWM Register Bits */ +#define LM3692X_PWM_FILTER_100 BIT(0) +#define LM3692X_PWM_FILTER_150 BIT(1) +#define LM3692X_PWM_FILTER_200 (BIT(0) | BIT(1)) +#define LM3692X_PWM_HYSTER_1LSB BIT(2) +#define LM3692X_PWM_HYSTER_2LSB BIT(3) +#define LM3692X_PWM_HYSTER_3LSB (BIT(3) | BIT(2)) +#define LM3692X_PWM_HYSTER_4LSB BIT(4) +#define LM3692X_PWM_HYSTER_5LSB (BIT(4) | BIT(2)) +#define LM3692X_PWM_HYSTER_6LSB (BIT(4) | BIT(3)) +#define LM3692X_PWM_POLARITY BIT(5) +#define LM3692X_PWM_SAMP_4MHZ BIT(6) +#define LM3692X_PWM_SAMP_24MHZ BIT(7) + +/* Boost Control Bits */ +#define LM3692X_OCP_PROT_1A BIT(0) +#define LM3692X_OCP_PROT_1_25A BIT(1) +#define LM3692X_OCP_PROT_1_5A (BIT(0) | BIT(1)) +#define LM3692X_OVP_21V BIT(2) +#define LM3692X_OVP_25V BIT(3) +#define LM3692X_OVP_29V (BIT(2) | BIT(3)) +#define LM3692X_MIN_IND_22UH BIT(4) +#define LM3692X_BOOST_SW_1MHZ BIT(5) +#define LM3692X_BOOST_SW_NO_SHIFT BIT(6) + +/* Fault Control Bits */ +#define LM3692X_FAULT_CTRL_OVP BIT(0) +#define LM3692X_FAULT_CTRL_OCP BIT(1) +#define LM3692X_FAULT_CTRL_TSD BIT(2) +#define LM3692X_FAULT_CTRL_OPEN BIT(3) + +/* Fault Flag Bits */ +#define LM3692X_FAULT_FLAG_OVP BIT(0) +#define LM3692X_FAULT_FLAG_OCP BIT(1) +#define LM3692X_FAULT_FLAG_TSD BIT(2) +#define LM3692X_FAULT_FLAG_SHRT BIT(3) +#define LM3692X_FAULT_FLAG_OPEN BIT(4) + +/** + * struct lm3692x_led + * @lock: Lock for reading/writing the device + * @client: Pointer to the I2C client + * @led_dev: LED class device pointer + * @regmap: Devices register map + * @enable_gpio: VDDIO/EN gpio to enable communication interface + * @regulator: LED supply regulator pointer + * @led_enable: LED sync to be enabled + * @model_id: Current device model ID enumerated + */ +struct lm3692x_led { + struct mutex lock; + struct i2c_client *client; + struct led_classdev led_dev; + struct regmap *regmap; + struct gpio_desc *enable_gpio; + struct regulator *regulator; + int led_enable; + int model_id; + + u8 boost_ctrl, brightness_ctrl; + bool enabled; +}; + +static const struct reg_default lm3692x_reg_defs[] = { + {LM3692X_EN, 0xf}, + {LM3692X_BRT_CTRL, 0x61}, + {LM3692X_PWM_CTRL, 0x73}, + {LM3692X_BOOST_CTRL, 0x6f}, + {LM3692X_AUTO_FREQ_HI, 0x0}, + {LM3692X_AUTO_FREQ_LO, 0x0}, + {LM3692X_BL_ADJ_THRESH, 0x0}, + {LM3692X_BRT_LSB, 0x7}, + {LM3692X_BRT_MSB, 0xff}, + {LM3692X_FAULT_CTRL, 0x7}, +}; + +static const struct regmap_config lm3692x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = LM3692X_FAULT_FLAGS, + .reg_defaults = lm3692x_reg_defs, + .num_reg_defaults = ARRAY_SIZE(lm3692x_reg_defs), + .cache_type = REGCACHE_RBTREE, +}; + +static int lm3692x_fault_check(struct lm3692x_led *led) +{ + int ret; + unsigned int read_buf; + + ret = regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf); + if (ret) + return ret; + + if (read_buf) + dev_err(&led->client->dev, "Detected a fault 0x%X\n", read_buf); + + /* The first read may clear the fault. Check again to see if the fault + * still exits and return that value. + */ + regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf); + if (read_buf) + dev_err(&led->client->dev, "Second read of fault flags 0x%X\n", + read_buf); + + return read_buf; +} + +static int lm3692x_leds_enable(struct lm3692x_led *led) +{ + int enable_state; + int ret, reg_ret; + + if (led->enabled) + return 0; + + if (led->regulator) { + ret = regulator_enable(led->regulator); + if (ret) { + dev_err(&led->client->dev, + "Failed to enable regulator: %d\n", ret); + return ret; + } + } + + if (led->enable_gpio) + gpiod_direction_output(led->enable_gpio, 1); + + ret = lm3692x_fault_check(led); + if (ret) { + dev_err(&led->client->dev, "Cannot read/clear faults: %d\n", + ret); + goto out; + } + + ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, 0x00); + if (ret) + goto out; + + /* + * For glitch free operation, the following data should + * only be written while LEDx enable bits are 0 and the device enable + * bit is set to 1. + * per Section 7.5.14 of the data sheet + */ + ret = regmap_write(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN); + if (ret) + goto out; + + /* Set the brightness to 0 so when enabled the LEDs do not come + * on with full brightness. + */ + ret = regmap_write(led->regmap, LM3692X_BRT_MSB, 0); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_BRT_LSB, 0); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_PWM_CTRL, + LM3692X_PWM_FILTER_100 | LM3692X_PWM_SAMP_24MHZ); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_HI, 0x00); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_LO, 0x00); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_BL_ADJ_THRESH, 0x00); + if (ret) + goto out; + + ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, + LM3692X_BL_ADJ_POL | LM3692X_RAMP_EN); + if (ret) + goto out; + + switch (led->led_enable) { + case 0: + default: + if (led->model_id == LM36923_MODEL) + enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN | + LM36923_LED3_EN; + else + enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN; + + break; + case 1: + enable_state = LM3692X_LED1_EN; + break; + case 2: + enable_state = LM3692X_LED2_EN; + break; + + case 3: + if (led->model_id == LM36923_MODEL) { + enable_state = LM36923_LED3_EN; + break; + } + + ret = -EINVAL; + dev_err(&led->client->dev, + "LED3 sync not available on this device\n"); + goto out; + } + + ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_ENABLE_MASK, + enable_state | LM3692X_DEVICE_EN); + + led->enabled = true; + return ret; +out: + dev_err(&led->client->dev, "Fail writing initialization values\n"); + + if (led->enable_gpio) + gpiod_direction_output(led->enable_gpio, 0); + + if (led->regulator) { + reg_ret = regulator_disable(led->regulator); + if (reg_ret) + dev_err(&led->client->dev, + "Failed to disable regulator: %d\n", reg_ret); + } + + return ret; +} + +static int lm3692x_leds_disable(struct lm3692x_led *led) +{ + int ret; + + if (!led->enabled) + return 0; + + ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN, 0); + if (ret) { + dev_err(&led->client->dev, "Failed to disable regulator: %d\n", + ret); + return ret; + } + + if (led->enable_gpio) + gpiod_direction_output(led->enable_gpio, 0); + + if (led->regulator) { + ret = regulator_disable(led->regulator); + if (ret) + dev_err(&led->client->dev, + "Failed to disable regulator: %d\n", ret); + } + + led->enabled = false; + return ret; +} + +static int lm3692x_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brt_val) +{ + struct lm3692x_led *led = + container_of(led_cdev, struct lm3692x_led, led_dev); + int ret; + int led_brightness_lsb = (brt_val >> 5); + + mutex_lock(&led->lock); + + if (brt_val == 0) { + ret = lm3692x_leds_disable(led); + goto out; + } else { + lm3692x_leds_enable(led); + } + + ret = lm3692x_fault_check(led); + if (ret) { + dev_err(&led->client->dev, "Cannot read/clear faults: %d\n", + ret); + goto out; + } + + ret = regmap_write(led->regmap, LM3692X_BRT_MSB, brt_val); + if (ret) { + dev_err(&led->client->dev, "Cannot write MSB: %d\n", ret); + goto out; + } + + ret = regmap_write(led->regmap, LM3692X_BRT_LSB, led_brightness_lsb); + if (ret) { + dev_err(&led->client->dev, "Cannot write LSB: %d\n", ret); + goto out; + } +out: + mutex_unlock(&led->lock); + return ret; +} + +static enum led_brightness lm3692x_max_brightness(struct lm3692x_led *led, + u32 max_cur) +{ + u32 max_code; + + /* see p.12 of LM36922 data sheet for brightness formula */ + max_code = ((max_cur * 1000) - 37806) / 12195; + if (max_code > 0x7FF) + max_code = 0x7FF; + + return max_code >> 3; +} + +static int lm3692x_probe_dt(struct lm3692x_led *led) +{ + struct fwnode_handle *child = NULL; + struct led_init_data init_data = {}; + u32 ovp, max_cur; + int ret; + + led->enable_gpio = devm_gpiod_get_optional(&led->client->dev, + "enable", GPIOD_OUT_LOW); + if (IS_ERR(led->enable_gpio)) { + ret = PTR_ERR(led->enable_gpio); + dev_err(&led->client->dev, "Failed to get enable gpio: %d\n", + ret); + return ret; + } + + led->regulator = devm_regulator_get_optional(&led->client->dev, "vled"); + if (IS_ERR(led->regulator)) { + ret = PTR_ERR(led->regulator); + if (ret != -ENODEV) + return dev_err_probe(&led->client->dev, ret, + "Failed to get vled regulator\n"); + + led->regulator = NULL; + } + + led->boost_ctrl = LM3692X_BOOST_SW_1MHZ | + LM3692X_BOOST_SW_NO_SHIFT | + LM3692X_OCP_PROT_1_5A; + ret = device_property_read_u32(&led->client->dev, + "ti,ovp-microvolt", &ovp); + if (ret) { + led->boost_ctrl |= LM3692X_OVP_29V; + } else { + switch (ovp) { + case 17000000: + break; + case 21000000: + led->boost_ctrl |= LM3692X_OVP_21V; + break; + case 25000000: + led->boost_ctrl |= LM3692X_OVP_25V; + break; + case 29000000: + led->boost_ctrl |= LM3692X_OVP_29V; + break; + default: + dev_err(&led->client->dev, "Invalid OVP %d\n", ovp); + return -EINVAL; + } + } + + child = device_get_next_child_node(&led->client->dev, child); + if (!child) { + dev_err(&led->client->dev, "No LED Child node\n"); + return -ENODEV; + } + + ret = fwnode_property_read_u32(child, "reg", &led->led_enable); + if (ret) { + fwnode_handle_put(child); + dev_err(&led->client->dev, "reg DT property missing\n"); + return ret; + } + + ret = fwnode_property_read_u32(child, "led-max-microamp", &max_cur); + led->led_dev.max_brightness = ret ? LED_FULL : + lm3692x_max_brightness(led, max_cur); + + init_data.fwnode = child; + init_data.devicename = led->client->name; + init_data.default_label = ":"; + + ret = devm_led_classdev_register_ext(&led->client->dev, &led->led_dev, + &init_data); + if (ret) + dev_err(&led->client->dev, "led register err: %d\n", ret); + + fwnode_handle_put(init_data.fwnode); + return ret; +} + +static int lm3692x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lm3692x_led *led; + int ret; + + led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + mutex_init(&led->lock); + led->client = client; + led->led_dev.brightness_set_blocking = lm3692x_brightness_set; + led->model_id = id->driver_data; + i2c_set_clientdata(client, led); + + led->regmap = devm_regmap_init_i2c(client, &lm3692x_regmap_config); + if (IS_ERR(led->regmap)) { + ret = PTR_ERR(led->regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = lm3692x_probe_dt(led); + if (ret) + return ret; + + ret = lm3692x_leds_enable(led); + if (ret) + return ret; + + return 0; +} + +static void lm3692x_remove(struct i2c_client *client) +{ + struct lm3692x_led *led = i2c_get_clientdata(client); + + lm3692x_leds_disable(led); + mutex_destroy(&led->lock); +} + +static const struct i2c_device_id lm3692x_id[] = { + { "lm36922", LM36922_MODEL }, + { "lm36923", LM36923_MODEL }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm3692x_id); + +static const struct of_device_id of_lm3692x_leds_match[] = { + { .compatible = "ti,lm36922", }, + { .compatible = "ti,lm36923", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_lm3692x_leds_match); + +static struct i2c_driver lm3692x_driver = { + .driver = { + .name = "lm3692x", + .of_match_table = of_lm3692x_leds_match, + }, + .probe = lm3692x_probe, + .remove = lm3692x_remove, + .id_table = lm3692x_id, +}; +module_i2c_driver(lm3692x_driver); + +MODULE_DESCRIPTION("Texas Instruments LM3692X LED driver"); +MODULE_AUTHOR("Dan Murphy "); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3