From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f53.google.com (mail-wm1-f53.google.com [209.85.128.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 354592E6CC2 for ; Tue, 3 Mar 2026 17:15:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772558155; cv=none; b=WhgY+jVqhTdwLNZLzNgwveZX9wGI8GL6jwWYfOcp+2Xc89sS7jv/tf7qVkcEs5Im1TjOGhRba3VRSS1CgyijwgG5RB+d4dgYIgnkbgMMygxQbE6IyN2VB+2V6J0y1K2KTuV/sje4b/0U0LWF/tXDYRnVQG5SMBS5p6gRoCRzcOU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772558155; c=relaxed/simple; bh=mXYstQbPCoqDNWhpwz7NiKnDkvyfKfjGt+vFhq+wBaQ=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=atYVYrT9aN9BfrKF9c6cedWnEz8BgxGUKopf6vn+/rjQRo28j4cn/Doap8z6xjp1oyFK9hDvtvWo3pF3iAvjxavADdxjBdcl8P1PXMuYdHfbLBIwx21zF2UxeHNdrgRkB9a2VoQvWPaguGjIrcHWQVtVlEBvod5gpP6G6LrFie4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mfqnEx7X; arc=none smtp.client-ip=209.85.128.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mfqnEx7X" Received: by mail-wm1-f53.google.com with SMTP id 5b1f17b1804b1-4806ce0f97bso50725285e9.0 for ; Tue, 03 Mar 2026 09:15:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772558153; x=1773162953; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:from:to:cc:subject :date:message-id:reply-to; bh=mXYstQbPCoqDNWhpwz7NiKnDkvyfKfjGt+vFhq+wBaQ=; b=mfqnEx7XR7yDGan2EjsrccJ/Y7gpsuG2h9MMQXBSPiSsrTCsSiXPcsJg338UVd5Zmw pa5shOLbFd4ccdp6ScgNh57gJifBRkUPq+Yp6UQqxjMBIFRMGjN6b+amInQxETspMfj3 uDWBeksyE9eTZ9ITiaW6+55+mKUwqIf4dY7mIJC6gDiq38sB+o9jb3EGoOv2CpNN+eJI y/baonLapFHgt0H9M0BpCwfy/OqEzPpOcHLTnAcZT1kS+Qc8hfQLcz0PP8H/UZVYZPZZ GOvdU0eyC32TEngBRoWAS6fKZM439k7vGqXf+gXa+88+xF97tIuyU7Ypj80EUPF1TnhR lf3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772558153; x=1773162953; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=mXYstQbPCoqDNWhpwz7NiKnDkvyfKfjGt+vFhq+wBaQ=; b=W9xD/Kd1FCDJ2UdznNYgjOOIdm9mO6lb024KnJyRtKRDgbE+V7D0gGpE4iebd5YhCc 4UknqGvgiTZZXCENjTCmEVqdxyykSwy/kqe3qmw0+mdYKBlTG1mEQ5NFj31TDM2O7w/n f9isQhrRuXAoS6XoCVTS3zMXn+RS91cyZrpw/Jao39O4JA5zwpgn4Q7O1VQ+MFzTNdvS q3vDomvTAWHL5D8EYWkeMNiXStBgrPEBeR7QiG6cM90onu6cRQjj48P8dogfQWzQaVCa gWxZOb2Ji4AaNafIpx8DS9+6IHE1QeFoX8tjwB1RWRt6rVx4O0buFC6iSQyORR7ZhLZd JPCQ== X-Forwarded-Encrypted: i=1; AJvYcCX52tUd792LqTpki2Jp3PCIx2i4TygPR1I60ltR6EgrgMUkVD3oBMccMN2OiBmaNO+uyIz1zm0AH+P5@vger.kernel.org X-Gm-Message-State: AOJu0Yy3a5/z1mtxgTHJjqk4N6dFV2lfUJ5E2QoyPgNRZukIjE55XoI5 M7QZS1AS7ZocrLcQBqKQlst3muAh4vWkV2vy2EMEK66LmIKSJ0biGLgc X-Gm-Gg: ATEYQzwOmO4eed2qdF5Ec/Bz/+CckdesWAcgDEm+MB9azqO8lvrI1WTyKH8oELWwAdW mVHO3uzVGKGjhlsBDrzbORM0ukevezfOxQxBbNLNvXmGVhXNOZBta5iS+tQVSbiv4+GMt8fkA2z yt49P+BL0tJ0hCMDzobBM5fQxW53qkPmXAhHyFjLdUFyb7GO7UWiQwUWbg/xVmKg3Er69GzD736 k9KeBKnEuNMsqbi/QfCKwD7nnWw9ix1sUUwmdF+q+ah8rTT6zd7x0TrCNFLu7IAbG5UziH7drpS TuvfQNgnRhWewUHMGPXmtT04PJa/HSeR9F/5M1Tii38NU7lE221VJVU/WDdZEDceNzGWoDofy5V k5eZbNheeJ0LbiZ+Pb5lAlNwV/PtVy2pLJzwuNlM043eSb13KhaGBK7TEt6LaBiBg82psrK9QhD FUlFOYVxjKvBCQFfPJzAGl96kB5UrUJU4= X-Received: by 2002:a05:600c:1c15:b0:483:6d4e:9811 with SMTP id 5b1f17b1804b1-483c9c0b6ddmr328267815e9.31.1772558152274; Tue, 03 Mar 2026 09:15:52 -0800 (PST) Received: from [192.168.1.187] ([148.63.225.166]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-439b130abfasm20520790f8f.34.2026.03.03.09.15.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 09:15:51 -0800 (PST) Message-ID: <59c3c6324ca971dc081624e0c31131b9e7dc9c63.camel@gmail.com> Subject: Re: [PATCH RFC 6/8] iio: frequency: ad9910: add RAM mode support From: Nuno =?ISO-8859-1?Q?S=E1?= To: Rodrigo Alencar <455.rodrigo.alencar@gmail.com>, Jonathan Cameron , Rodrigo Alencar via B4 Relay Cc: rodrigo.alencar@analog.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Lars-Peter Clausen , Michael Hennerich , David Lechner , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel Date: Tue, 03 Mar 2026 17:16:35 +0000 In-Reply-To: <4rzqg6gax4r3symyoimekikz7p4pfwjzhfamjudk64f32675oj@nlrz53u56p55> References: <20260220-ad9910-iio-driver-v1-0-3b264aa48a10@analog.com> <20260220-ad9910-iio-driver-v1-6-3b264aa48a10@analog.com> <20260301133153.7f2f8501@jic23-huawei> <4rzqg6gax4r3symyoimekikz7p4pfwjzhfamjudk64f32675oj@nlrz53u56p55> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2026-03-03 at 15:32 +0000, Rodrigo Alencar wrote: > On 26/03/01 01:31PM, Jonathan Cameron wrote: > > On Fri, 20 Feb 2026 16:46:10 +0000 > > Rodrigo Alencar via B4 Relay wrote: > >=20 > > > From: Rodrigo Alencar > > >=20 > > > Add RAM channel with support for profile-based control. This includes= : > > > - RAM data loading via binary sysfs attribute (ram_data); > >=20 > > I'm not sure that's a long term viable path.=C2=A0 We either need > > to figure out how to do it as firmware file load, or via an output buff= er. >=20 > Could you develop on this? it is not viable because iio would drop that > support? using sysfs_create_bin_file() directly would be better? >=20 > > Firmware load would probably be too static and I'm not sure quite > > how we map these to IIO output buffers. >=20 > will investigate this buffer route. At this point, we can have multiple > buffers, right? I have the DMA engine buffer working with the parallel po= rt. >=20 > ...=20 In theory yes but we do have some issues with the implementation. I have so= me fixes but for code that, unfortunately, cannot land upstream anytime soon a= nd with no users, these fixes can be an hard sell. So if we go the multi buffer sup= port it could be a great opportunity for these. That said, the fixes are only meaningful if we do need to restrict channels= to a specific buffer. Not sure if that will be the case here. - Nuno S=C3=A1