From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793716929; b=NR0GGo3b9wjsn9k7IcGkhzHJ4psPhuYXOlsh+8xS10rUXwW6/DmwOe55s309+Y72Ga+r CyAyaVXHuS1GahdU53XmZ6Dv+HIh+/VKDtxwHupuxb+y27hhFJAWsoQ8Tq6znYKqbAGYS RAjwAU4pa/UDZSbQNfr26yXC/F/BOUb5JZNMFVd6op8sK+kXNXcnxYKT8hmHLnXAMdahi DyrmadxeIOQrht1R/gjwm45BOwtyFj0pqfY0EHgZneAtX1stpxc80SSlOT3DM/iT/PukE zaKDc3iPj0gHZCvdUm/SJaGF5EiaQzimEw8vhzfRZg4xGf2kYbRJjcnhbxaD2BpmYog== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793716929; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=XMbRjeXjK8HpPncDUdoXbZIVfAoatGdmgR/tQAmDQc4=; b=Opy8xd/Veb7Tg3l6XQYWatK8isJH7rk8ll8BAGGLFd3dS30mZ57zeewVlwE8gKSXGvpd psrBK4A03izHRcqeuWYcDlqetymGzlUmfomHEOUFkRGfrlqAUDEii032VjVTucvzKgqwN J7B2vQpZCKkixdZZP7EEgINMTjVe9lqPsgsj1j6jnVGW6ThW4sXniOBeMJkoJSZfrc6Te PDImuZd8oc9xVhTFr7CHX/5TQHxp2W+m2w8kKowBaBMkKLXIAYiCgo5P+4yP4rezjjX4V TggisUEM0dsoYKymhfxKyUPsdmzQuWbfZKlUOUOo6USlfBiojX/BFpZT3KZn+Ra9fWQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=R+C9b1g9; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 74423606A332; Tue, 3 Nov 2026 14:42:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=R+C9b1g9 Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB4AD1F000C1; Tue, 3 Nov 2026 14:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793716929; bh=XMbRjeXjK8HpPncDUdoXbZIVfAoatGdmgR/tQAmDQc4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=R+C9b1g9x1xIC4nQ7+4q4VaAGG0Q/QOC+5KBaa2cPTIuBhOZqwkBQJU/tuLr4fFyc TkjMcDB3+pkAStkno+5k62DzD+IEPrI3MCiVhGvUSauhctT+jnCNnniKCic+GcdpTK VC+qDYygRD+ltAT8ojIuV7m3kGChkSQJCTLu9aYk9x7qaDKB98t1bFdxrVxltkRURw /CkWEYrqfIMrp4KXhoWcBkqgoCNs/AhrfdoixdmoMUYXYfZ2c4d2/+KmY2vnft+bIK i1jBobQJhZdqvwEJnukp6b9PFFFVwyxmoAXhPwi3MN+T1y0pxYqov3vmWyg4Z2+r75 4PQfhwSsGGX3g== Date: Tue, 3 Nov 2026 14:42:03 +0000 From: Daniel Thompson To: Roman Vivchar Cc: Lee Jones , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: Re: [PATCH 1/2] dt-bindings: leds: backlight: add Kinetic KTD3137 Message-ID: References: <20261102-6768-ktd3137-v1-0-b5b4f903c56e@protonmail.com> <20261102-6768-ktd3137-v1-1-b5b4f903c56e@protonmail.com> <_kyk4j6fx0PX5QqVrjAIGH-5fzUhj-fKhD8YT4F734mCOnQCDXui6wQB77AOka69_gblWOJN2SxzC5OSrH1lXiQeciLfVnWuPHS0JfaMKD4=@protonmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <_kyk4j6fx0PX5QqVrjAIGH-5fzUhj-fKhD8YT4F734mCOnQCDXui6wQB77AOka69_gblWOJN2SxzC5OSrH1lXiQeciLfVnWuPHS0JfaMKD4=@protonmail.com> On Tue, Nov 03, 2026 at 02:34:02PM +0000, Roman Vivchar wrote: > Hi Daniel, > > On Tuesday, November 3rd, 2026 at 4:05 PM, Daniel Thompson wrote: > > On Mon, Nov 02, 2026 at 09:58:48PM +0200, Roman Vivchar via B4 Relay wrote: > > > + led-max-microamp: > > > + minimum: 5000 > > > + maximum: 29800 > > > + default: 20200 > > > + > > > + vin-supply: true > > > + > > > +required: > > > + - compatible > > > + - reg > > > + - vin-supply > > > > Why is vin-supply required? > > > > The chip cannot function without VIN power supply. Even if it's on the > always-on power rail on certain board, there's always a chance it might be > accidentally left disabled on the other. It's better to document supply in > the bindings as far as I understand. You haven't just documented the binding, you have also made the property mandatory by adding it to required. So what I am asking is why is this property listed as required. You didn't implement the driver in a way that makes the supply mandatory. Daniel.