From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4AB6DC33C9E for ; Thu, 30 Jan 2020 07:57:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E07220702 for ; Thu, 30 Jan 2020 07:57:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726464AbgA3H53 (ORCPT ); Thu, 30 Jan 2020 02:57:29 -0500 Received: from smtp.220.in.ua ([89.184.67.205]:40835 "EHLO smtp.220.in.ua" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726397AbgA3H53 (ORCPT ); Thu, 30 Jan 2020 02:57:29 -0500 Received: from [192.168.202.100] (unknown [95.67.115.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.220.in.ua (Postfix) with ESMTPSA id B98041A21715; Thu, 30 Jan 2020 09:57:26 +0200 (EET) From: Oleh Kravchenko Subject: Re: How to synchronize leds in trigger To: Jacek Anaszewski , linux-leds@vger.kernel.org References: <69050f67-b611-dfd9-b166-a0d51edc18e2@kaa.org.ua> Autocrypt: addr=oleg@kaa.org.ua; prefer-encrypt=mutual; keydata= mQINBFoN/ysBEAC8JmIsjbpgHCXhOuuRtHQrpFhrrs5bNNSRztXxnVYtyR5sbsEgh8dFt9ZZ TZ3qWFSDPHY/9AHUxoKIvonRFTiluSuLVKwM5mxgqzvPaqnekoYRafzW3hYgPcjXp+JEw4At vIPKGpKDn+J03c1L/vYlXT9FASQdL7fhtc0FK5wMn3biS1d9D5PnurTLKvLWmwYjWxNduW8/ g15g4NhoDQf3syruPMSyCCXmH2CpzJXs+8VWSvySHG9wE/9QXAfskb9wFx+NSYyNdou5JxPn dt9XnI0MjXoc0X3IH6eBjxgIpYkVydmQnbajgxWopz4Hi6uCsJSj5z26m803cyel1XgwLXin uKGdWi8W/TFJy6rbbEwfeUDHr4btCPU5hZS/PFV1rsDoOxMRYlgaI8U4AKnzFZSiDvjX9t6s 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u0q8t+6HIP1VWw73qZ233By1VCEohLVJV1+cZ0/kUgkocr7aZuyNLLN/awZc0g+pj42u2BDC WVdfrwbus0lVCELNSvCIW2IktSytUxjQfmjBMw== Message-ID: <54c07894-f302-fe1e-9f03-aa30ea1abca1@kaa.org.ua> Date: Thu, 30 Jan 2020 09:57:08 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="boqO8W9ty02GZVLWnmzqjp2IkWp3nJnpV" Sender: linux-leds-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --boqO8W9ty02GZVLWnmzqjp2IkWp3nJnpV Content-Type: multipart/mixed; boundary="BulolhCI6Cztt7j0bKLJb1a69bwZ1T8P8" --BulolhCI6Cztt7j0bKLJb1a69bwZ1T8P8 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US Hello Jacek, On 28.01.20 21:58, Jacek Anaszewski wrote: > Currently LED framework does not support that. > We would need a global pattern trigger, that would allow registering > a set of LEDs for events firing at different time slots. > > It is feasible, but it would take months to agree upon interface > and implementation. The question is whether it wouldn't be an overkill.= I'm happy to invest my time to implement such functionality. I think it can be really useful for LEDs array like CR0014114 . In few days I can publish my vision, but before that could you please explain why it will took months? Where it can be hard to implement? > What prevents you from solving this problem in userspace? User-space don't fast enough to provide correct timings. --=20 Best regards, Oleh Kravchenko --BulolhCI6Cztt7j0bKLJb1a69bwZ1T8P8-- --boqO8W9ty02GZVLWnmzqjp2IkWp3nJnpV Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEC/TM5t+2NenFhW0Q0xNJm20pl4wFAl4yjFQACgkQ0xNJm20p l4yDJA//dXeEhp/hVlS5M90eYl0wEOHdqa6EuM+D+yLlQtZAzePuzEMbcj6HMeH2 qu61Li2RZJJWJomCWX0jUfbmLST8BfCFRpl2N0GECPkRPTUhgzGCNpFB5L4CHowB hrP0buV/AkEJGViAeCJmHfFP7Z3L4WGJzSUGX6PQHy5K0yaHNjBmLa/IAUsiRIPK TPdzoRytuiuLcP45sBUSCCuQYzSaJ2T0PT7xmiOZrM3z3e58A2vpqNWhR3mEQCKg nJLW/9CSDh2QAINjDRma/c6JIHJbfCxTnxuYG0IJSqIvKFUaV+GMkMzBX5LNjQ71 3ZwuVvMcFfdJIy/DL+f8jJeEdShemMr/y3Uj+rOPW5HrmE+O4xDDkR5efSA/r8gm aH8EIg0JWtYwjr9y665SHcObStRg99Y50KxRH6puq9Tf/PAIz52wVjeJuyOCaeAD Xfn0sSgTYuhIW6uyUnUlKt/ahvtRkW9YbQipKC6gIXZO6bOpU5T6muPe6DCx+/iA WS1h+Xn7Uf0/LSFqzu5U6PIqNHsMKq6dBjKzIqCBkdI6xh7KtlyuyJDxuvIOWm7Q kbAYO7rGuYSi5jnUu9ePdeHDbBcwMd8h4s4krUUtYmHEUI6zU0O7Q8fe6xoEhYAO 7TdfjjByKAibSC/TVFJ2Pa0VNLId3bZnNnMMQIUyjMIdKc5l6TU= =T7Ni -----END PGP SIGNATURE----- --boqO8W9ty02GZVLWnmzqjp2IkWp3nJnpV--