linux-kernel - Re: [PATCH v2 0/2] Add Support for LTC3220 18 Channel LED Driver V2

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Message-ID: <20260113-remarkable-determined-pogona-bfb2ab@quoll>
Date: Tue, 13 Jan 2026 09:02:25 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Edelweise Escala <edelweise.escala@...log.com>
Cc: Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, linux-leds@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] Add Support for LTC3220 18 Channel LED Driver V2

On Mon, Jan 12, 2026 at 04:55:53PM +0800, Edelweise Escala wrote:
> The LTC3220/LTC3220-1 is a multi-display LED driver, which contains a
> high-efficiency, low-noise charge pump to provide power to up to
> 18 LED current sources. The LEDs are individually configurable to
> 64-step linear brightness control, blinking and gradation control
> via 2-wire I2C interface. The blinking and gradation configuration
> is shared across all LED.
> 
> LTC3220 has a quick write function which allows changing the brightness
> on all LEDS simultaneously when the brightness is changed on led 1.
> For this we made quick write a device property which user can set on the 
> device tree. We would like to know if this approach is alright?
> Another way we might want to know is, is it alright to just make a
> virtual led for the quick write function. Changing brightness on 
> the virtual led will change the brightness for all.
> 
> V2 Changelog:
> leds-ltc3220.yaml changes
> -Fix wrapping on description
> -Improve description and commit messge to describe hardware
> -Drop ltc3220-1
> -Drop charge pump
> ltc3220.c changes
> -Fix wrapping
> -Drop ltc3220-1
> -Drop devname_mandatory 
> 
> Signed-off-by: Edelweise Escala <edelweise.escala@...log.com>
> ---
> Changes in v2:
> - EDITME: describe what is new in this series revision.
> - EDITME: use bulletpoints and terse descriptions.

Huh?

> - Link to v1: https://lore.kernel.org/r/20260106-ltc3220-driver-v1-0-73601d6f1649@analog.com

Best regards,
Krzysztof