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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/leds/leds-lp8860.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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().
...
Diffstat (limited to 'drivers/leds/leds-lp8860.c')
-rw-r--r-- | drivers/leds/leds-lp8860.c | 491 |
1 files changed, 491 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c new file mode 100644 index 000000000..e2b36d318 --- /dev/null +++ b/drivers/leds/leds-lp8860.c @@ -0,0 +1,491 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TI LP8860 4-Channel LED Driver + * + * Copyright (C) 2014 Texas Instruments + * + * Author: Dan Murphy <dmurphy@ti.com> + */ + +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/leds.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/slab.h> + +#define LP8860_DISP_CL1_BRT_MSB 0x00 +#define LP8860_DISP_CL1_BRT_LSB 0x01 +#define LP8860_DISP_CL1_CURR_MSB 0x02 +#define LP8860_DISP_CL1_CURR_LSB 0x03 +#define LP8860_CL2_BRT_MSB 0x04 +#define LP8860_CL2_BRT_LSB 0x05 +#define LP8860_CL2_CURRENT 0x06 +#define LP8860_CL3_BRT_MSB 0x07 +#define LP8860_CL3_BRT_LSB 0x08 +#define LP8860_CL3_CURRENT 0x09 +#define LP8860_CL4_BRT_MSB 0x0a +#define LP8860_CL4_BRT_LSB 0x0b +#define LP8860_CL4_CURRENT 0x0c +#define LP8860_CONFIG 0x0d +#define LP8860_STATUS 0x0e +#define LP8860_FAULT 0x0f +#define LP8860_LED_FAULT 0x10 +#define LP8860_FAULT_CLEAR 0x11 +#define LP8860_ID 0x12 +#define LP8860_TEMP_MSB 0x13 +#define LP8860_TEMP_LSB 0x14 +#define LP8860_DISP_LED_CURR_MSB 0x15 +#define LP8860_DISP_LED_CURR_LSB 0x16 +#define LP8860_DISP_LED_PWM_MSB 0x17 +#define LP8860_DISP_LED_PWM_LSB 0x18 +#define LP8860_EEPROM_CNTRL 0x19 +#define LP8860_EEPROM_UNLOCK 0x1a + +#define LP8860_EEPROM_REG_0 0x60 +#define LP8860_EEPROM_REG_1 0x61 +#define LP8860_EEPROM_REG_2 0x62 +#define LP8860_EEPROM_REG_3 0x63 +#define LP8860_EEPROM_REG_4 0x64 +#define LP8860_EEPROM_REG_5 0x65 +#define LP8860_EEPROM_REG_6 0x66 +#define LP8860_EEPROM_REG_7 0x67 +#define LP8860_EEPROM_REG_8 0x68 +#define LP8860_EEPROM_REG_9 0x69 +#define LP8860_EEPROM_REG_10 0x6a +#define LP8860_EEPROM_REG_11 0x6b +#define LP8860_EEPROM_REG_12 0x6c +#define LP8860_EEPROM_REG_13 0x6d +#define LP8860_EEPROM_REG_14 0x6e +#define LP8860_EEPROM_REG_15 0x6f +#define LP8860_EEPROM_REG_16 0x70 +#define LP8860_EEPROM_REG_17 0x71 +#define LP8860_EEPROM_REG_18 0x72 +#define LP8860_EEPROM_REG_19 0x73 +#define LP8860_EEPROM_REG_20 0x74 +#define LP8860_EEPROM_REG_21 0x75 +#define LP8860_EEPROM_REG_22 0x76 +#define LP8860_EEPROM_REG_23 0x77 +#define LP8860_EEPROM_REG_24 0x78 + +#define LP8860_LOCK_EEPROM 0x00 +#define LP8860_UNLOCK_EEPROM 0x01 +#define LP8860_PROGRAM_EEPROM 0x02 +#define LP8860_EEPROM_CODE_1 0x08 +#define LP8860_EEPROM_CODE_2 0xba +#define LP8860_EEPROM_CODE_3 0xef + +#define LP8860_CLEAR_FAULTS 0x01 + +#define LP8860_NAME "lp8860" + +/** + * struct lp8860_led + * @lock: Lock for reading/writing the device + * @client: Pointer to the I2C client + * @led_dev: led class device pointer + * @regmap: Devices register map + * @eeprom_regmap: EEPROM register map + * @enable_gpio: VDDIO/EN gpio to enable communication interface + * @regulator: LED supply regulator pointer + */ +struct lp8860_led { + struct mutex lock; + struct i2c_client *client; + struct led_classdev led_dev; + struct regmap *regmap; + struct regmap *eeprom_regmap; + struct gpio_desc *enable_gpio; + struct regulator *regulator; +}; + +struct lp8860_eeprom_reg { + uint8_t reg; + uint8_t value; +}; + +static struct lp8860_eeprom_reg lp8860_eeprom_disp_regs[] = { + { LP8860_EEPROM_REG_0, 0xed }, + { LP8860_EEPROM_REG_1, 0xdf }, + { LP8860_EEPROM_REG_2, 0xdc }, + { LP8860_EEPROM_REG_3, 0xf0 }, + { LP8860_EEPROM_REG_4, 0xdf }, + { LP8860_EEPROM_REG_5, 0xe5 }, + { LP8860_EEPROM_REG_6, 0xf2 }, + { LP8860_EEPROM_REG_7, 0x77 }, + { LP8860_EEPROM_REG_8, 0x77 }, + { LP8860_EEPROM_REG_9, 0x71 }, + { LP8860_EEPROM_REG_10, 0x3f }, + { LP8860_EEPROM_REG_11, 0xb7 }, + { LP8860_EEPROM_REG_12, 0x17 }, + { LP8860_EEPROM_REG_13, 0xef }, + { LP8860_EEPROM_REG_14, 0xb0 }, + { LP8860_EEPROM_REG_15, 0x87 }, + { LP8860_EEPROM_REG_16, 0xce }, + { LP8860_EEPROM_REG_17, 0x72 }, + { LP8860_EEPROM_REG_18, 0xe5 }, + { LP8860_EEPROM_REG_19, 0xdf }, + { LP8860_EEPROM_REG_20, 0x35 }, + { LP8860_EEPROM_REG_21, 0x06 }, + { LP8860_EEPROM_REG_22, 0xdc }, + { LP8860_EEPROM_REG_23, 0x88 }, + { LP8860_EEPROM_REG_24, 0x3E }, +}; + +static int lp8860_unlock_eeprom(struct lp8860_led *led, int lock) +{ + int ret; + + mutex_lock(&led->lock); + + if (lock == LP8860_UNLOCK_EEPROM) { + ret = regmap_write(led->regmap, + LP8860_EEPROM_UNLOCK, + LP8860_EEPROM_CODE_1); + if (ret) { + dev_err(&led->client->dev, "EEPROM Unlock failed\n"); + goto out; + } + + ret = regmap_write(led->regmap, + LP8860_EEPROM_UNLOCK, + LP8860_EEPROM_CODE_2); + if (ret) { + dev_err(&led->client->dev, "EEPROM Unlock failed\n"); + goto out; + } + ret = regmap_write(led->regmap, + LP8860_EEPROM_UNLOCK, + LP8860_EEPROM_CODE_3); + if (ret) { + dev_err(&led->client->dev, "EEPROM Unlock failed\n"); + goto out; + } + } else { + ret = regmap_write(led->regmap, + LP8860_EEPROM_UNLOCK, + LP8860_LOCK_EEPROM); + } + +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lp8860_fault_check(struct lp8860_led *led) +{ + int ret, fault; + unsigned int read_buf; + + ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf); + if (ret) + goto out; + + fault = read_buf; + + ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf); + if (ret) + goto out; + + fault |= read_buf; + + /* Attempt to clear any faults */ + if (fault) + ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR, + LP8860_CLEAR_FAULTS); +out: + return ret; +} + +static int lp8860_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brt_val) +{ + struct lp8860_led *led = + container_of(led_cdev, struct lp8860_led, led_dev); + int disp_brightness = brt_val * 255; + int ret; + + mutex_lock(&led->lock); + + ret = lp8860_fault_check(led); + if (ret) { + dev_err(&led->client->dev, "Cannot read/clear faults\n"); + goto out; + } + + ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB, + (disp_brightness & 0xff00) >> 8); + if (ret) { + dev_err(&led->client->dev, "Cannot write CL1 MSB\n"); + goto out; + } + + ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB, + disp_brightness & 0xff); + if (ret) { + dev_err(&led->client->dev, "Cannot write CL1 LSB\n"); + goto out; + } +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lp8860_init(struct lp8860_led *led) +{ + unsigned int read_buf; + int ret, i, reg_count; + + if (led->regulator) { + ret = regulator_enable(led->regulator); + if (ret) { + dev_err(&led->client->dev, + "Failed to enable regulator\n"); + return ret; + } + } + + if (led->enable_gpio) + gpiod_direction_output(led->enable_gpio, 1); + + ret = lp8860_fault_check(led); + if (ret) + goto out; + + ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf); + if (ret) + goto out; + + ret = lp8860_unlock_eeprom(led, LP8860_UNLOCK_EEPROM); + if (ret) { + dev_err(&led->client->dev, "Failed unlocking EEPROM\n"); + goto out; + } + + reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]); + for (i = 0; i < reg_count; i++) { + ret = regmap_write(led->eeprom_regmap, + lp8860_eeprom_disp_regs[i].reg, + lp8860_eeprom_disp_regs[i].value); + if (ret) { + dev_err(&led->client->dev, "Failed writing EEPROM\n"); + goto out; + } + } + + ret = lp8860_unlock_eeprom(led, LP8860_LOCK_EEPROM); + if (ret) + goto out; + + ret = regmap_write(led->regmap, + LP8860_EEPROM_CNTRL, + LP8860_PROGRAM_EEPROM); + if (ret) { + dev_err(&led->client->dev, "Failed programming EEPROM\n"); + goto out; + } + + return ret; + +out: + if (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\n"); + } + + return ret; +} + +static const struct reg_default lp8860_reg_defs[] = { + { LP8860_DISP_CL1_BRT_MSB, 0x00}, + { LP8860_DISP_CL1_BRT_LSB, 0x00}, + { LP8860_DISP_CL1_CURR_MSB, 0x00}, + { LP8860_DISP_CL1_CURR_LSB, 0x00}, + { LP8860_CL2_BRT_MSB, 0x00}, + { LP8860_CL2_BRT_LSB, 0x00}, + { LP8860_CL2_CURRENT, 0x00}, + { LP8860_CL3_BRT_MSB, 0x00}, + { LP8860_CL3_BRT_LSB, 0x00}, + { LP8860_CL3_CURRENT, 0x00}, + { LP8860_CL4_BRT_MSB, 0x00}, + { LP8860_CL4_BRT_LSB, 0x00}, + { LP8860_CL4_CURRENT, 0x00}, + { LP8860_CONFIG, 0x00}, + { LP8860_FAULT_CLEAR, 0x00}, + { LP8860_EEPROM_CNTRL, 0x80}, + { LP8860_EEPROM_UNLOCK, 0x00}, +}; + +static const struct regmap_config lp8860_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = LP8860_EEPROM_UNLOCK, + .reg_defaults = lp8860_reg_defs, + .num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs), + .cache_type = REGCACHE_NONE, +}; + +static const struct reg_default lp8860_eeprom_defs[] = { + { LP8860_EEPROM_REG_0, 0x00 }, + { LP8860_EEPROM_REG_1, 0x00 }, + { LP8860_EEPROM_REG_2, 0x00 }, + { LP8860_EEPROM_REG_3, 0x00 }, + { LP8860_EEPROM_REG_4, 0x00 }, + { LP8860_EEPROM_REG_5, 0x00 }, + { LP8860_EEPROM_REG_6, 0x00 }, + { LP8860_EEPROM_REG_7, 0x00 }, + { LP8860_EEPROM_REG_8, 0x00 }, + { LP8860_EEPROM_REG_9, 0x00 }, + { LP8860_EEPROM_REG_10, 0x00 }, + { LP8860_EEPROM_REG_11, 0x00 }, + { LP8860_EEPROM_REG_12, 0x00 }, + { LP8860_EEPROM_REG_13, 0x00 }, + { LP8860_EEPROM_REG_14, 0x00 }, + { LP8860_EEPROM_REG_15, 0x00 }, + { LP8860_EEPROM_REG_16, 0x00 }, + { LP8860_EEPROM_REG_17, 0x00 }, + { LP8860_EEPROM_REG_18, 0x00 }, + { LP8860_EEPROM_REG_19, 0x00 }, + { LP8860_EEPROM_REG_20, 0x00 }, + { LP8860_EEPROM_REG_21, 0x00 }, + { LP8860_EEPROM_REG_22, 0x00 }, + { LP8860_EEPROM_REG_23, 0x00 }, + { LP8860_EEPROM_REG_24, 0x00 }, +}; + +static const struct regmap_config lp8860_eeprom_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = LP8860_EEPROM_REG_24, + .reg_defaults = lp8860_eeprom_defs, + .num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs), + .cache_type = REGCACHE_NONE, +}; + +static int lp8860_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct lp8860_led *led; + struct device_node *np = dev_of_node(&client->dev); + struct device_node *child_node; + struct led_init_data init_data = {}; + + led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + child_node = of_get_next_available_child(np, NULL); + if (!child_node) + return -EINVAL; + + led->enable_gpio = devm_gpiod_get_optional(&client->dev, + "enable", GPIOD_OUT_LOW); + if (IS_ERR(led->enable_gpio)) { + ret = PTR_ERR(led->enable_gpio); + dev_err(&client->dev, "Failed to get enable gpio: %d\n", ret); + return ret; + } + + led->regulator = devm_regulator_get(&client->dev, "vled"); + if (IS_ERR(led->regulator)) + led->regulator = NULL; + + led->client = client; + led->led_dev.brightness_set_blocking = lp8860_brightness_set; + + mutex_init(&led->lock); + + i2c_set_clientdata(client, led); + + led->regmap = devm_regmap_init_i2c(client, &lp8860_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; + } + + led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config); + if (IS_ERR(led->eeprom_regmap)) { + ret = PTR_ERR(led->eeprom_regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = lp8860_init(led); + if (ret) + return ret; + + init_data.fwnode = of_fwnode_handle(child_node); + init_data.devicename = LP8860_NAME; + init_data.default_label = ":display_cluster"; + + ret = devm_led_classdev_register_ext(&client->dev, &led->led_dev, + &init_data); + if (ret) { + dev_err(&client->dev, "led register err: %d\n", ret); + return ret; + } + + return 0; +} + +static void lp8860_remove(struct i2c_client *client) +{ + struct lp8860_led *led = i2c_get_clientdata(client); + int 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\n"); + } + + mutex_destroy(&led->lock); +} + +static const struct i2c_device_id lp8860_id[] = { + { "lp8860", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lp8860_id); + +static const struct of_device_id of_lp8860_leds_match[] = { + { .compatible = "ti,lp8860", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_lp8860_leds_match); + +static struct i2c_driver lp8860_driver = { + .driver = { + .name = "lp8860", + .of_match_table = of_lp8860_leds_match, + }, + .probe = lp8860_probe, + .remove = lp8860_remove, + .id_table = lp8860_id, +}; +module_i2c_driver(lp8860_driver); + +MODULE_DESCRIPTION("Texas Instruments LP8860 LED driver"); +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); +MODULE_LICENSE("GPL v2"); |