From: Rillian Grant <rillian.grant@gmail.com>
To: Lee Jones <lee@kernel.org>, Pavel Machek <pavel@kernel.org>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Ruslan Koreev <koreev.r@gmail.com>,
linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Rillian Grant <rillian.grant@gmail.com>
Subject: [PATCH v2 0/4] leds: flash: LM3643 dual LED flash driver
Date: Mon, 28 Sep 2026 10:42:33 +0100 [thread overview]
Message-ID: <20260928094302.86966-1-rillian.grant@gmail.com> (raw)
This series adds a flash LED driver for the Texas Instruments
LM3643. I wrote it to support the Windows Hello NIR illuminator on my
ThinkPad X9-15 Gen 1, which has a single LED connected to both current
sources. The driver has also been tested by Ruslan Koreev on a ThinkPad
X1 Carbon Gen 14.
On both ThinkPad models the chip is described by ACPI but has no _DSD.
The original RFC asked how to supply the missing child nodes. This
series includes DMI-matched software nodes for both laptop models.
1/4 DT binding
2/4 driver
3/4 DMI match table and values for the X1 Carbon
4/4 DMI entry for the X9-15 Gen 1
Changes in v2:
- Rebased onto leds/for-leds-next
- dt-bindings: make flash-max-microamp, led-max-microamp and
flash-max-timeout-us required
- driver: return device to standby state when the last output is
switched off (squashed fix provided by Ruslan Koreev)
- New 3/4: DMI mechanism and entry for the X1 Carbon developed by
Ruslan. Plus a minor update to provide a reg property for consistency
with the DT bindings.
- New 4/4: DMI entry for the X9-15 Gen 1 and update struct names to be
model-specific.
v1: https://lore.kernel.org/all/20260821083620.68324-1-rillian.grant@gmail.com/
Rillian Grant (3):
dt-bindings: leds: Document TI LM3643 dual LED flash driver
leds: flash: Add support for the TI LM3643 dual LED flash driver
leds: flash: lm3643: Describe the LED on the Lenovo ThinkPad X9-15 Gen
1
Ruslan Koreev (1):
leds: flash: lm3643: Describe the LED of ACPI boards without LED nodes
.../devicetree/bindings/leds/ti,lm3643.yaml | 129 +++
MAINTAINERS | 7 +
drivers/leds/flash/Kconfig | 12 +
drivers/leds/flash/Makefile | 1 +
drivers/leds/flash/leds-lm3643.c | 919 ++++++++++++++++++
5 files changed, 1068 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3643.yaml
create mode 100644 drivers/leds/flash/leds-lm3643.c
base-commit: 05b4738b0078f7d6f154f68068a11c8a0635e9df
--
2.55.0
next reply other threads:[~2026-09-28 9:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 9:42 Rillian Grant [this message]
2026-09-28 9:42 ` [PATCH v2 1/4] dt-bindings: leds: Document TI LM3643 dual LED flash driver Rillian Grant
2026-09-28 9:49 ` sashiko-bot
2026-10-01 6:34 ` Krzysztof Kozlowski
2026-09-28 9:42 ` [PATCH v2 2/4] leds: flash: Add support for the " Rillian Grant
2026-09-28 9:54 ` sashiko-bot
2026-09-28 9:42 ` [PATCH v2 3/4] leds: flash: lm3643: Describe the LED of ACPI boards without LED nodes Rillian Grant
2026-09-28 9:50 ` sashiko-bot
2026-09-28 10:08 ` Rillian Grant
2026-09-28 9:42 ` [PATCH v2 4/4] leds: flash: lm3643: Describe the LED on the Lenovo ThinkPad X9-15 Gen 1 Rillian Grant
2026-09-28 9:49 ` sashiko-bot
2026-09-29 9:29 ` [PATCH v2 0/4] leds: flash: LM3643 dual LED flash driver Ruslan Koreev
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