[PATCH v4 0/2] leds: Add support for the is31fl3206 LED driver

[Flavio Amieiro <flavio@amieiro.net>]

This patch series adds support for the is31fl3206 LED driver to the
already existing is31fl32xx driver.

The main difference between this specific variant and the others in
the series is that the LED Control Register controls not only the
enable status of the channel, but also the maximum output current for
it.

This patch allows the chipdef to define at which offset the LED enable
bits are inside the LED Control Register, so when calculating the
value to write to the register we can offset it to the correct
position in the register for ICs like the IS31FL3206.

The patches keep the behavior of the drivers for the other ICs in the
family: initializing the LEDs by enabling all of them and setting
output current to maximum and then using only the PWM registers to
control the brightness of the LEDs.

Signed-off-by: Flavio Amieiro <flavio@amieiro.net>
---
Changes in v4:
- Changes approach from pointers to functions (used in v3) to
  describing the LED control register layout.
- Link to v3: https://patch.msgid.link/20261013-add-is31fl3206-support-v3-0-66a762a3c12f@amieiro.net

Changes in v3:
- Reorganizes the commits so the dt-bindings are documented before using
  them
- Link to v2: https://patch.msgid.link/20261013-add-is31fl3206-support-v2-0-ca0d2bf5783f@amieiro.net

Changes in v2:
- Avoid double initialization when enable_all_channels is non-NULL
- Add missing entry in the i2c_device_id table
- Link to v1: https://patch.msgid.link/20261013-add-is31fl3206-support-v1-0-08c066cc241d@amieiro.net

To: Lee Jones <lee@kernel.org>
To: Pavel Machek <pavel@kernel.org>
To: Griffin Kroah-Hartman <griffin@kroah.com>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
Cc: linux-leds@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

---
Flavio Amieiro (2):
      dt-bindings: leds: Add issi,is31fl3206 to leds-is31fl32xx
      leds: is31f132xx: Add support for is31fl3206

 .../devicetree/bindings/leds/leds-is31fl32xx.txt   |  1 +
 drivers/leds/leds-is31fl32xx.c                     | 25 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)
---
base-commit: 59cf91cf87abb67a49b1bb7b9d3b06486abde8cf
change-id: 20261012-add-is31fl3206-support-d557f863a97a

Best regards,
--  
Flavio Amieiro <flavio@amieiro.net>