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 E7DE11E5205; Sun, 17 Aug 2025 07:14:28 +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=1755414869; cv=none; b=H73bofx9T7GlIhkeSjTBlFtHQ6NlqwuqOB4yFQxjJH5OypGdUCC9OZL5bpncAKfKTzZimlLcjLPVoaTkAJeA5oztGwjO03K6nvaaWYazYF26pANIayvve19dBhpb4B7/+bYH07YfIDOJtGwqHkW+fK9rUV4kveD2cv9rWnMZNso= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755414869; c=relaxed/simple; bh=CThEjxgOwT3iqjGRK3tipYdqduI3LpFx6bUPJIUUNCY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=dexETC8xivdcJQ3FMbebttsJDw/daNxTUVNrmKsOrPgVWsZsoHiKu6b7qJzqpjwyU0BvyvhZgB+SKU5ndmuSu4DI/WUN69mOWErvaB1ICWkHinCwV2/m65bdLMgDoQQpveM7LQtcrFlVa+vbO+SaGP4zzbyxjxHIhnr/wiDAHo4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pkicQW+p; 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="pkicQW+p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D05FC4CEEB; Sun, 17 Aug 2025 07:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755414868; bh=CThEjxgOwT3iqjGRK3tipYdqduI3LpFx6bUPJIUUNCY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=pkicQW+pG2ZaMACVhoMtWV/Xq1VnP6h/NTooXNcwt8/xkhBfyYKQ5e1eGmjTo0tkA Tuz13kyc3KOuZe7cRz2qTt9JYM29ZV4eTJFERZcDb2Rs6tK3V9WGKt2q73ijLpfMBU c7TkyOkQPqSoh3HlQgACZ+XF5xYJwtQRAOulsS2Ec4oa2okx3lY2FYIG7xIiX02GlC G1tVfQZX9vNuOaFrnhTDv6muk1Js06/m6spwDn+op/TIHF+zc9KAz/l9bn/P5A+zrR Xs74RpS7vhZzlLh1Svrs3DQ1IfQ3XGo0pansr/u98T3ULGYkTBA1jucGX/XFZCAGKJ u+nPfxRRRrrew== Message-ID: Date: Sun, 17 Aug 2025 09:14:24 +0200 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 v2 1/2] dt-bindings: Pinefeat cef168 lens control board To: Aliaksandr Smirnou Cc: conor+dt@kernel.org, devicetree@vger.kernel.org, krzk+dt@kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, robh@kernel.org References: <20250814-intelligent-industrious-cassowary-b73c9b@kuoka> <20250814201038.15054-1-support@pinefeat.co.uk> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 14/08/2025 22:10, Aliaksandr Smirnou wrote: > On Thu, 14 Aug 2025 11:04:10 +0200, Krzysztof Kozlowski wrote: >> You describe here the entire board, not the MCU only or lens motor >> only... > > Since you asked about 5 V, I was explaining that this power source is not > relevant for the driver. > >> Can the board be used outside of above setup? I understand so far this >> is only for Rpi where both above supplies - 3.3 V and 5 V - are coming >> from the header pins, so supplies would be totally redundant. > > There are several variants of the board, differing only in physical size > and type of CSI connector, targeting different cameras. The board should > be compatible with any single-board computer that uses a similar CSI > connector pinout and MIPI signal lane assignment. For example, the NVIDIA > Jetson series replicates the Raspberry Pi camera and GPIO header pinout. > So yes, the board can be used outside of a Raspberry Pi setup. If they replicate also power coming from the header and CSI line, then it's fine, but if the do not, then you would need a controllable regulator supply. > > As noted above, these supplies are redundant and were not included in the > driver description. Given that, is it acceptable to remove the vcc-supply > property? Yeah, for simplicity. Please mention this rationale in the commit msg - power supply is derived from fixed supplies (connector/header on RPi), so representing it is redundant. Best regards, Krzysztof