From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B063039282C; Wed, 25 Mar 2026 08:58:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774429080; cv=none; b=XHcwx1p6YHU6JMK2GhWtXK0xZxIVqgCjeuXJT5ZRen+UsRZQCHetzKLqmYbZwhwYxyvPg7LeRl7b5zG/394nmEOMSUk8SsvjYw+fg2xBWxGxr0y0j3f5+DfgFUmmOkVddtWOqm7cl3pvzVp20C7eynMKeU+O1NIToKD5wtGz5w0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774429080; c=relaxed/simple; bh=RHV7dPFjKCS10WhsyRbEySf3zhgA9Tr47TRrrff7hII=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XZ6q6zPWzHvTJcfFEMiZlf6Vhr4qp4ENVkap5uRkYw16e6Xw0OkoZrH35gHfuEWdPEw7jlQMdhlE49Gzo7Y912XlNHExt976ASB1v4tee+i6CkEFFFaDGDZtGZbXBXrFYj+YQEa7iEFbHfUxDZMdyO+QGZ5kBYYmM+3j38tJWwA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fQecE42v; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fQecE42v" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E65A8C4CEF7; Wed, 25 Mar 2026 08:57:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774429080; bh=RHV7dPFjKCS10WhsyRbEySf3zhgA9Tr47TRrrff7hII=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=fQecE42v6hrZZj04TpdxDuhwrnuaslBdBkQmkvtTudL1/AmjbmtL7D2Olr9qThA/J eP4ikVWjqENAlwcNXMxEUdV6lNMUDWWRyW1hhXATGN90qFj/EDI/dM95Q68PVvUPXh fsBik2+gFfQJP2sNRZfg0bsd2PSYD53jiuHHxINY6bYZbB6tSZ0VtCmRL987fVwI4Y QTCaXlhKb20T4t7KbDtyZk518sBzhIwnrp6fU44fJM2v6J6zgyH7gFL0CoJznU1wmi T35KPPm8WQQ8hutj0+fWwskRMEV9DFvLaXd5iC7QJn+WCKAL2+0UxL/GQpXeijDKxN o3Az/SyKrK70g== Message-ID: <4d10b6c0-d599-4fc5-b9ed-ce669ac46e84@kernel.org> Date: Wed, 25 Mar 2026 09:57:56 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 1/2] dt-bindings: iio: proximity: add ST VL53L1X ToF sensor To: Sirat Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-kernel@vger.kernel.org References: <20260325063254.18062-1-email@sirat.me> <20260325063254.18062-2-email@sirat.me> <20260325-gentle-earthworm-of-progress-1f9f46@quoll> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 25/03/2026 09:48, Sirat wrote: > On Wed, Mar 25, 2026 at 2:05 PM Krzysztof Kozlowski wrote: >> >> On Wed, Mar 25, 2026 at 12:32:22PM +0600, Siratul Islam wrote: >>> Add device tree binding documentation for the STMicroelectronics >>> VL53L1X Time-of-Flight ranging sensor connected via I2C. >>> >>> Make vdd-supply required. The device requires power to operate >>> and the property should have been required from the start. >> >> That's ABI break and device for many years was working fine, so this >> should not be changed. >> > Jonathan and David asked that vdd-supply be made required. I feel like > there is a conflict here that I am not able to resolve myself. > > What I think about it is the binding does not correctly describe the > hardware and we should consider this a bug and fix it. > The driver worked because of a fallback mechanism (dummy/fake > regulator) and not because power was optional. > I looked at v6 and v5 and I do not see such comment for binding that existing device should change ABI. Can you point me to it? Best regards, Krzysztof