From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f171.google.com (mail-pg1-f171.google.com [209.85.215.171]) (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 5C1552472BD for ; Sat, 1 Nov 2025 11:37:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761997065; cv=none; b=aoSniPEGyPWxHkIE5trmBKBgm6dGHCralDbBoOAABKC2vR4WYTxHwGFzNqNIX4f7llwp6l3gLVI6OZBJLFOg3+qtxwkD9UVW3XfUo9BVfG4Klcy6rftOvfDUPwnlL/t3pRWZnDSl31knAXGIVgyaJM5yE7vxnrVdAR9d3T5VdFQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761997065; c=relaxed/simple; bh=7IfCe1yJZ8OATH2vDaCumIpLU4/MgZjeWWPo4JOsHeI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=lFT88CfOoi5t2xNm8XhEshFfWjZ7sMPK3Ag6B/SU4xoq+Mkql7Idw1UY9UuJpfwkOaeHoHhkpgQTJnzI8NuEpyU5iXx9gQelCinB9Nj6nsHLzUwwKaNU4dj0qUc6AC/36cifsZdU37LsGd62Dzv9UqH3x+XzwuY+lEhgnkh2mak= 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=kmWx0x2Q; arc=none smtp.client-ip=209.85.215.171 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="kmWx0x2Q" Received: by mail-pg1-f171.google.com with SMTP id 41be03b00d2f7-b6ceb3b68eeso2339924a12.2 for ; Sat, 01 Nov 2025 04:37:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1761997064; x=1762601864; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=l7p4U/aotayqb+o6BTayF37konWJWlNpUHWv7lMsZ+s=; b=kmWx0x2QJm2h7NYgilHXZjUnELxxao2Pn4NalMWDEtRS/GPrf6n0ogY01KiOuo6BXR kTpi4XFwIWtsqmkAJuGudfkY42Ro0eFGRyq39YfFvBfMiDonqXPm5dD/Tf+rzDGT1r9m L2RYAdlMcIDCAckLPN3jVjUq7EMhJ6np3YveBaoHkWfH8Cf7hdWNjpl8dlDGmB4aq4Pv nwmZZNnardmgtwv5gmWH6/1uCsqnZOTw4xpFa8N/Q23wOlKPsWYjz6/DKmb3oEif/rNn rQGyZ1WDY0N4EPQ6Vho6z4lV3/42e4ZY38vlUmmxjFCE1UXgXuJ322HE42vXasccKb33 jgSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761997064; x=1762601864; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=l7p4U/aotayqb+o6BTayF37konWJWlNpUHWv7lMsZ+s=; b=wZiPviEHkaDegmd9WxOM9xqOosoeCnH/LT4oarojKbj8mGfrqNPmfpa6qr6bBHbS3W 6iKS3QkivoGt/dabldT9cyL9CfFd4QH7AnbkTjRoyif1vdlQtQ1HfT/kxHPeW9QaXj/b bkWcpBn3x/2zaj/WqPILk5EVoyYmEXYLWlFXahv395eaQX+kCfeo2r9mI9dNfGm4D29X TfCiRQQPdkbu50+o/yusALC6o31gELCR8cHpHf9s49xhl8evZ5jB/+JQgV8uZZJBPRG+ DgzyWb4yukOiWRvChFnzpTejhZX9ChZO4DMw5V8r5xjCZtTxLhNcwPoFzcHmT8z24sXU 6HWA== X-Forwarded-Encrypted: i=1; AJvYcCWcx2vmF90UwVHn5OA0EhBLTfLQQ+L/TGOdEim/QKfIATFjgHYhzellBcE6hg7LpLzM0YDlLVbh5B6xXTg=@vger.kernel.org X-Gm-Message-State: AOJu0YyjlA97yEQgH1+0sEzsd8APZ0+fgY/rEgZXogTdtAEsYxEkrb5f K9HTeV3M2ewmIWDyvoe4OQ1ZacHYVrNwUs4FUXyObiOuTiVUwZpvRJk9 X-Gm-Gg: ASbGncuYQk7k51aR+w5gzSdF68FlbPaeiliDcsmIRkgEDpLz6g0QcWLs0UWX3MqHzcx kx4x5kTH360jdE8UBTHh+eD0QwZWu2n4y57IPOVPUsdjpdT7zvT6d8g6HbjttUVlngYNJWoD++I B3OV4xl6Lb2qAoHM65pW8s0BDpw6zHyTGq8o82eKDS3Z2pO3LiLfzZUnyNjb0czOoO4+FAdI1y3 ig6Wd82TtqKnmOfztoWvbADYhH0MrE0auP7DmWGNBLMU64/DSWWKUIPMvuG84VFagNJmn3SVsKR ssS4B5XeVTljUU1kEKdBVPZ80F4xQuCXxrQMHwrVhlXIUDjp3jFMWfUL44D5trgh5TqiyzzyD3J msPdZRpLS51MEay7lkOz6ySea17buxooU5ioy2olsWNBEmwOjki08+5L9KwXvYJS3mIdnvrWTQO FLwnFvVI2Ld5io+f57kZ4M1Jke8FpOThdIXmf+2wDBGiDs1v9XQCtNMDUUthJAwBH0xXu0dS2Jc q0fakSuenAdPgEU7Pw+sD9YHYZYrI11et7Qyn1rKjbymLrelhLlhCuEIYbBGRZuyCT+zM5sDBQp sE9z9Qtr X-Google-Smtp-Source: AGHT+IElqgpdi0hmBlhoWaDzwCMRVG9l19J7bo2p6s9Q8XOq2cgtoU26ySYjwTwYUrWC/KeNqbFRWQ== X-Received: by 2002:a17:903:18b:b0:295:5dbe:f629 with SMTP id d9443c01a7336-2955dbef73cmr10992835ad.8.1761997063284; Sat, 01 Nov 2025 04:37:43 -0700 (PDT) Received: from ?IPV6:2402:e280:21d3:2:61a9:cfa6:c139:b812? ([2402:e280:21d3:2:61a9:cfa6:c139:b812]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2955967f329sm16919845ad.108.2025.11.01.04.37.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 01 Nov 2025 04:37:43 -0700 (PDT) Message-ID: <406fbb02-5a2b-4097-a645-b97d3d74287c@gmail.com> Date: Sat, 1 Nov 2025 17:07:38 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/3] iio: adc: Add support for TI ADS1120 ADC To: Andy Shevchenko Cc: linux-iio@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, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251030163411.236672-1-ajithanandhan0406@gmail.com> Content-Language: en-US From: Ajith Anandhan In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 10/31/25 2:07 PM, Andy Shevchenko wrote: > On Thu, Oct 30, 2025 at 10:04:08PM +0530, Ajith Anandhan wrote: >> This RFC patch series adds support for the Texas Instruments ADS1120, >> a precision 16-bit delta-sigma ADC with SPI interface. >> >> The driver provides: >> - 4 single-ended voltage input channels >> - Programmable gain amplifier (1 to 128) >> - Configurable data rates (20 to 1000 SPS) >> - Single-shot conversion mode >> >> I'm looking for feedback on: >> 1. The implementation approach for single-shot conversions >> 2. Any other suggestions for improvement >> >> Datasheet: https://www.ti.com/lit/gpn/ads1120 > The cover letter missed to answer the Q: Why a new driver? Have you checked the > existing drivers? Do we have a similar enough one that may be extended to > support this chip? > Hi Andy, Thank you for the feedback. I evaluated the following existing driver before creating a new one: ads124s08.c - TI ADS124S08 - This is the closest match (both are delta-sigma, SPI-based) - However, significant differences exist:     * Different register layout (ADS124S08 has more registers)     * Different command set ADS124S08 has built-in MUX for differential inputs     * Different register addressing and bit fields and conversion timing and data retrieval. would require extensive conditional code paths that might reduce maintainability for both devices. A separate, focused driver seemed cleaner. BR, Ajith Anandhan.