Apologies for the noise — v1 (Message-ID:
<20260603035411.396383-1-github.com@herrie.org>) was sent as a bare
[PATCH] without a cover letter. This v2 resends with the correct
format. No code changes relative to v1.
---
The TI LM8502 is an I2C-attached combo device combining ten constant-
current LED outputs (D1..D10) with an internal H-bridge for driving a
vibrator motor. Pin D10 is shared between the tenth LED channel and
the haptic output.
This patch adds the MFD core driver:
- i2c probe with optional vcc regulator (High Power Mode handshake
for RPM-managed LDOs carrying "regulator-allow-set-load") and
optional chip-enable GPIO
- Software reset and post-reset configuration sequence
- Chip readiness verification via an LP55xx-style write-CHIP_EN-
then-readback loop (250 ms bound); children only probe once the
chip is known to be ACKing the bus
- Devres-ordered teardown: lm8502_power_off() registered via
devm_add_action_or_reset() *before* devm_mfd_add_devices() so
devres LIFO unwinds children first (their .remove callbacks issue
final regmap writes against a still-powered chip), then powers
off the rail
- MAINTAINERS entry covering all four driver files
Two children are spawned:
ti,lm8502-leds - LED-class outputs D1..D10
ti,lm8502-haptic - EV_FF / FF_RUMBLE input device
The corresponding child drivers land in subsequent patches.
The DT binding for this device was submitted separately:
Subject: [PATCH] dt-bindings: mfd: add ti,lm8502 combo LED + haptic controller
Changes since v1:
- Resend with cover letter; no code changes
Herman van Hazendonk (1):
mfd: lm8502: add core MFD driver for TI LM8502
MAINTAINERS | 9 +
drivers/mfd/Kconfig | 18 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/lm8502.c | 511 +++++++++++++++++++++++++++++++++++++
include/linux/mfd/lm8502.h | 130 ++++++++++
5 files changed, 669 insertions(+)
create mode 100644 drivers/mfd/lm8502.c
create mode 100644 include/linux/mfd/lm8502.h
base-commit: 944125b4c454b58d2fe6e35f1087a932b2050dff
--
2.43.0