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 A12C22F998C; Thu, 4 Sep 2025 09:45:19 +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=1756979119; cv=none; b=RwbMpFd7ML9DKHE4DqgAoU0q9B9ihX7aDBI8uM8jXtF1tJdrAac2clyu0rvEpPqnX4m1GTQRUFdRtKkJv3FXeyXH4rY3bSxwvgyJch5S1bfmqHhkzwU1E8omSTA7uakwHjbDLcLUFYPhZ3MoNFndl5XuWDI6Ga7mJ2KqTNXtasA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756979119; c=relaxed/simple; bh=0r5FIQ4xaCT5SgkMCLWrKt8e/3lx3MGJSD+XrXdAEFc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MBX9gAfE4VYqssn348vnMewGwfa0KUUu6sE4XQGus/vbnZ1/WONnV9OVGThGAfeZEyv2Wg2vcx05Kp2oSMEvFUKv3aOHR/EyfbofULA5S/ZYJslEzG3tG56JFfG6YdRRklwkiBaasSsjBeos8e+86Z9WUddLirkNwOfP5+/svMw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PjDJmraD; 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="PjDJmraD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5BD6AC4CEF0; Thu, 4 Sep 2025 09:45:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756979119; bh=0r5FIQ4xaCT5SgkMCLWrKt8e/3lx3MGJSD+XrXdAEFc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=PjDJmraDyybRaYvIze32DxHaaa3FvbdygznQ+81qJdvZo1iwb+QyWg61HBQsaeEOA 3QhP00w2Qk/Udr5dVpM+icxslU+1kp0kVWIZHGkCIBamS5TJ+4mN4+6RSeuY2qlXC9 IF6ylUa6LExmDiDYHAA8sBCXuKvUar6VPO9TN9l9dzoxhP11xZ3JkK4Q6TJrZIoWzn z676z0nQLJ0vDGMU2fW7oKnKJjBWjkfw7s2eX2QU4/tf6a5bVXBGW+foZZG5cGg94r 2Mv1rPWZISBhF6gTfAvBnqD1LoMDFZVagNv2d4LpCLL+/oA/CxzdfvH54MZfFop7xn iiJVmPIQWmmPA== Message-ID: Date: Thu, 4 Sep 2025 11:45:14 +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 1/2] dt-bindings: leds: add generic LED consumer documentation To: Hans de Goede , Aleksandrs Vinarskis Cc: robh@kernel.org, bryan.odonoghue@linaro.org, conor+dt@kernel.org, devicetree@vger.kernel.org, krzk+dt@kernel.org, lee@kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, pavel@kernel.org References: <20250902182114.GA965402-robh@kernel.org> <20250903235615.134520-1-alex@vinarskis.com> <20250904-brave-zippy-quoll-fcb054@kuoka> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 04/09/2025 09:26, Hans de Goede wrote: >>>>> +maintainers: >>>>> + - Aleksandrs Vinarskis >>>>> + >>>>> +description: >>>>> + Some LED defined in DT are required by other DT consumers, for example >>>>> + v4l2 subnode may require privacy or flash LED. >>>>> + >>>>> + Document LED properties that its consumers may define. >>>> >>>> We already have the trigger-source binding for "attaching" LEDs to >>>> devices. Why does that not work here? >>> >>> I have not actually considered this, as the existing privacy-led solution >>> from the original series is not trigger based. At least one of the reasons >>> for that is that trigger source can be rather easily altered from user >>> space, which would've been bad for this use case. If v4l2 acquires control >>> over the LED it actually removes triggers and disables sysfs on that LED. >> >> So does that mean that v4l2 solves the problem of "trigger source can be >> rather easily altered from user space"? > > Yes, currently the v4l2-core already does: Thanks, I understand that it solves the problem described in the patch, so the patch can be dropped. Best regards, Krzysztof