Re: [PATCH 1/1] dt-bindings: mfd: add ti,lm8502 combo LED + haptic controller

[Krzysztof Kozlowski <krzk@kernel.org>]

On Wed, Jun 03, 2026 at 10:02:56AM +0200, Herman van Hazendonk wrote:
> Add a YAML binding for the TI LM8502, an I2C combo LED + haptic
> controller used in the HP TouchPad tablet. The chip is exposed as an
> MFD with two child sub-nodes:
> 
>   ti,lm8502-leds   - LED-class outputs D1..D10 (with per-LED reg
>                      and led-max-microamp properties)
>   ti,lm8502-haptic - EV_FF / FF_RUMBLE input device for the internal
>                      H-bridge vibrator output, optional
>                      ti,invert-direction property
> 
> Signed-off-by: Herman van Hazendonk <github.com@herrie.org>
> ---
>  .../devicetree/bindings/mfd/ti,lm8502.yaml    | 160 ++++++++++++++++++
>  1 file changed, 160 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ti,lm8502.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ti,lm8502.yaml b/Documentation/devicetree/bindings/mfd/ti,lm8502.yaml
> new file mode 100644
> index 000000000000..10f2e32a0738
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti,lm8502.yaml
> @@ -0,0 +1,160 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ti,lm8502.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI LM8502 combo LED + haptic controller
> +
> +maintainers:
> +  - Herman van Hazendonk <github.com@herrie.org>
> +
> +description: |
> +  The TI LM8502 is an I2C combo device with ten constant-current LED
> +  outputs (D1..D10) and an internal H-bridge that drives a vibrator
> +  motor. Pin D10 is shared between the tenth LED channel and the
> +  haptic output; the haptic driver writes D10_CURRENT_CTRL = 0 at each
> +  start to mux the pin to the H-bridge path.
> +
> +  The chip is exposed in Linux as an MFD with two children:
> +    - ti,lm8502-leds   - LED-class outputs D1..D10
> +    - ti,lm8502-haptic - EV_FF / FF_RUMBLE input device
> +
> +  The parent node owns the I2C client, the chip-enable GPIO and the
> +  vcc regulator; children share access to the parent's regmap.
> +
> +properties:
> +  compatible:
> +    const: ti,lm8502

And where is any user of that? We do not take unused bindings.


Best regards,
Krzysztof