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 7E6A736922B; Wed, 11 Feb 2026 10:42:55 +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=1770806575; cv=none; b=mr+S3XVxS+6JzRe+bZyWgCYh4pmFpokfKDBBZ2OxXXX/cZLVXOGtDuGq2CsFcjs7FOC66M1QuB/Z9LJyMCFH5sZdKae1GNlb9jjqGdZQ27hVz5DuBqkH0s8jhiC5erhVtQ1OAq69H+v3aKUFAjwG3Zsj+VMTtcBxlK1+omTrhJY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770806575; c=relaxed/simple; bh=+TJZD01KvelL4iwlD6N/evUSacmlYWza4z+Y3+fpu0w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jAsrHWMU0NkGRquTkaIRESl3lRJuAFfypwSbI0hGMzZGutJ2frZn67jLownMnq+MQyvtZRpkM0zSKATLAqnpXa+7NZ6OfEy0L+4URdJXpWpismubTqEb0gmnQB42/82Xkx3cIQC3pHaDq3+ppdHeelukwsjsgpQrX/7/mLI8izk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qO2iHuTO; 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="qO2iHuTO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76A54C19421; Wed, 11 Feb 2026 10:42:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770806575; bh=+TJZD01KvelL4iwlD6N/evUSacmlYWza4z+Y3+fpu0w=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=qO2iHuTOoXcg6nNa9gR9vFtHuv4xJHQc6P1EOlVxxrz9EuXbqsgqYasc+/6wXE5JJ ZwQk7Ju3F3bwoUQf9oZjILu4MkUcssQ7A/1i9bJcURLdP+ltR0RVe+QX5UOyR2Z/39 4Fj2J+V4DBI1B5Zm7dEgCExIOj1xnwUcxMiteCExzT7z+HQtp1faSLAsf90X8VdrrV 3whAjVVI8fv+w4KHPUORbS0Pfdbb/bbu9oF0W0gEkhrOthry2fQ7vH01XmdgBf//oW aJ6OEMMhP4I0cvLi9s5FAW2AUv43BSifxlGe/PNUc0/3Vi0WgLk1SVMapXp4ARrTxO 4GdCN+xfBwWBw== Message-ID: <7fd3256a-55c7-4867-a2ce-fd5be55efe9c@kernel.org> Date: Wed, 11 Feb 2026 11:42:50 +0100 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 v2 2/2] gpio: aggregator: add gpio-aggregator DT compatible To: Bartosz Golaszewski Cc: James Hilliard , linux-gpio@vger.kernel.org, Geert Uytterhoeven , Linus Walleij , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Stein , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260211081355.3028947-1-james.hilliard1@gmail.com> <20260211081355.3028947-2-james.hilliard1@gmail.com> <34a9b531-4f53-47ee-861e-1b18ff1a5752@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 11/02/2026 11:36, Bartosz Golaszewski wrote: > On Wed, Feb 11, 2026 at 11:13 AM Krzysztof Kozlowski wrote: >> >>>> >>>> static const struct of_device_id gpio_aggregator_dt_ids[] = { >>>> + { >>>> + .compatible = "gpio-aggregator", >>>> + }, >>>> { >>>> .compatible = "gpio-delay", >>>> .data = (void *)FWD_FEATURE_DELAY, >>>> -- >>>> 2.43.0 >>>> >>> >>> Regardless of the DT bindings - this change is perfectly fine. We do >> >> You cannot have compatible without DT bindings, so this alone is not >> "perfectly fine". Maybe you wanted platform_device_id entry for >> ACPI/legacy/MFD devices? >> > > Sure you can, you just can't put it into upstream devicetree sources. No, you cannot. You cannot have undocumented ABI. That's the rule and upstream DTS does not matter. ABI is also for non-upstream users. > We have had a compatible for gpio-sim for testing purposes for years. And I fixed in it 2024... > Why would it be illegal to enable matching of platform drivers over DT > for testing purposes? You can match. You cannot have undocumented ABI. This is the rule. Best regards, Krzysztof