From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 843C0443E58; Wed, 15 Jul 2026 18:29:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784140201; cv=none; b=sf0Rd1dcXNvIMOeYNkSYfGtXsXTanies31Na95rkAqHsQc2Xmk5+rIdEtqWlqAs/XXYk29tU077u0uz3OgxYOrmF6dBSaW9oeMLJdtrDmQkPlaBPgYda815IZB+UpcQQYazudhcMflk/0jfcK2w0f8G1tBT7j9iEVDJz1+eDAHk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784140201; c=relaxed/simple; bh=5Hhx9hTXzBl+KHHAd5y7bDT1L9mwziJVwN8QQ/88Kh0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q/7n39ozpbXU6FbPx1lJbABXZ/lyDQBVZKSGf5kf3OdI5hBebLE0E9ZXR7cLZB4IkFfwBmkQBh5kpx8SdCD7rbxmDXDIYUUVTnmSXKiUdwv1+imuxBWn/ZJKtICCpe/o+3IZ1XK7v2JjiKVu03xWhQUVtWIxwykR9niZtJMkfHE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R64NRlwi; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R64NRlwi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79C5C1F000E9; Wed, 15 Jul 2026 18:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784140192; bh=m9EZ6WFfHR8NNH32nm0Pzpwwjx7Gv9Yhtrd4QxA+b3s=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=R64NRlwikpnHsASIVAmwGzClZigFwJigpZK3WDg3jA9VCD89dFQs/biSoRUQw/lCf qrz++5bVgjdyakvtZhY7SwPezMaAKyZObFUetBmYG68xyPuBXL1CdY//pzDzul44Wk TPA73kN2mus50saPFngLCaU6yykWTgPk3njybphvmFdKoVr5XCNYqpH5dO7CYk/Tls BYVO9AZKdDkFYHDSj6Vjw3Me0d7GIVe7fibPCuWyOJV5FkjUbp6vb/WaCBks/0VZgS eHzgsHRIi1X71Qh7rK1rljUuly8pt/2l5audMOZE70S7qUiIPusd/N36NeJjstvYI1 I6yYIp/bfkKXw== Message-ID: <82e3c736-f06f-484a-887c-9e156cb7cb44@kernel.org> Date: Wed, 15 Jul 2026 20:29:44 +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 v16 02/10] dt-bindings: iio: imu: icm42600: Remove interrupts from required To: Chris Morgan Cc: Chris Morgan , linux-iio@vger.kernel.org, andy@kernel.org, nuno.sa@analog.com, dlechner@baylibre.com, jic23@kernel.org, jean-baptiste.maneyrol@tdk.com, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, andriy.shevchenko@intel.com References: <20260713215842.69097-1-macroalpha82@gmail.com> <20260713215842.69097-3-macroalpha82@gmail.com> <20260715-mottled-uncovered-mastodon-6c08be@quoll> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 15/07/2026 16:52, Chris Morgan wrote: > On Wed, Jul 15, 2026 at 07:52:52AM +0200, Krzysztof Kozlowski wrote: >> On Mon, Jul 13, 2026 at 04:58:32PM -0500, Chris Morgan wrote: >>> From: Chris Morgan >>> >>> Interrupts are almost never required for IIO devices per upstream >>> maintainers. Remove interrupt as a required parameter for the >>> devicetree binding. >> >> That's an odd statement. We do require interrupts when the hardware >> requires them. We do not require interrupts, not because we have such >> policy, but because hardware does not require them. >> >> Plus, we do require interrupts when software implementing ABI requires >> them. >> >> Above commit msg is simply inaccurate and misleading. Instead, please >> use actual hardware arguments or how ABI is actually used. You must not >> introduce changes to ABI just "because" while for example making that >> ABI conflicting with existing implementation. > > I will defer then to Jonathan on the specifics of this, but from what I > can tell: > > 1) The icm42600 devices don't need an interrupt for operation other > than for buffered mode or wake on movement. One-shot should work > without it. > > 2) The existing icm42600 driver does require an interrupt however, and > refuses to bind without it. The driver could in theory be modified to > not require an interrupt though and skip using buffered mode and WoM > when no interrupt is present; however I don't plan on making these > changes at this time. > > 3) The new icm42607 driver I'm trying to upstream does not use an > interrupt, because on my current test device it's not even wired up. > On future devices that I have with this chip I may pursue using an > interrupt, but it will never be required. > > So should I go back to requiring the interrupt for all devices except > for the new driver then? You mentioned two drivers, I don't know how does this relate to them. In any case your commit msg is inaccurate and not a correct reason to make a change. Best regards, Krzysztof