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 EE7CA433BE; Sat, 28 Sep 2024 07:26:22 +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=1727508383; cv=none; b=f54hOfxtKhX/3oGn8gn3jZadFSA8FBVQNQfdikkfT29M+Rh7C8y8PIDyABsGyFcWi1EFSC9/5ZrK5DZv/PF94QP2g12kAGRurfy+6NrtI9aUPCN9CNaNmRZqKressB9LOOIosqJ0MRv8Q3XX08LVKYLm5A+wYndRJHA7IIwfDtM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727508383; c=relaxed/simple; bh=XeC4PW0Whv9b+1HHWwAWv78GOoWUAjHO/LYLVgPTd7Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BQJKczaSJTOExI31exHUCSeknpI8flYA8ZnAKfoTjgiX5Oh9/PjOddvKWhKfYl0q5zGaajftz2S+AdQU0I0/GkJ6RB4LK0AIV1PlvWyQlVLT8ruNFHtesQ4X+9J54AlV20emcBC41ocQ6oZ45OkPOX8uMjBhjCmkbJtCcahNyMA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=E8yF6ZA3; 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="E8yF6ZA3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1435FC4CEC3; Sat, 28 Sep 2024 07:26:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727508382; bh=XeC4PW0Whv9b+1HHWwAWv78GOoWUAjHO/LYLVgPTd7Y=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=E8yF6ZA3HyM1oSfUFAH5fNOrBUo76LjqVe+rt47L6Cz81slaYsAhJiYu57cWVo1h/ dSvHQUdea3tB30ZNJ4IEqleB+PxsTNbyjsKAg58V0CsURtmSn6r2P5stoJS+uxLSJF emnpjRZ9sOwJZvOgd8LWesiTio6H29iHY95ENG5DpBsBo0XVBcdUEX7dvRqhhvUNOR ILtaHnyrVI+M4q9P2wuMR5QirOJx174tkECBtp6S9L0A6oM+4z0Y0A7uZOG+pjLkea IGpEfv5aUpRotoxqf9SLmy7ez/RLSw1ruYlzpOJM4GD73Knpus0rKZiQNbNU/E82pz i2U/sIdZHJkGQ== Message-ID: <388618b1-39a8-464b-a7e8-fb721d1f765c@kernel.org> Date: Sat, 28 Sep 2024 09:26:18 +0200 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] dt-bindings: input: gpio-keys: allow generic 'interrupt-parent' for subnodes To: Dmitry Torokhov Cc: Wolfram Sang , linux-renesas-soc@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-input@vger.kernel.org, devicetree@vger.kernel.org References: <20240927081757.7022-2-wsa+renesas@sang-engineering.com> <1762ec04-4dba-4de1-b380-73bf391462e5@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 27/09/2024 23:27, Dmitry Torokhov wrote: > On Fri, Sep 27, 2024 at 10:30:12AM +0200, Krzysztof Kozlowski wrote: >> On 27/09/2024 10:15, Wolfram Sang wrote: >>> Allow interrupt-parent in the main node, so it can be inherited to all >>> subnodes. This is more compact and less error-prone. >>> >>> Signed-off-by: Wolfram Sang >>> --- >>> >>> It would fix dtbs_check for arch/arm/boot/dts/renesas/r8a7779-marzen.dts >>> and would simplify arch/arm/boot/dts/renesas/r7s72100-rskrza1.dts. >>> >>> Plus, it is the behaviour I would expect. >>> >>> Documentation/devicetree/bindings/input/gpio-keys.yaml | 3 +++ >>> 1 file changed, 3 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/input/gpio-keys.yaml b/Documentation/devicetree/bindings/input/gpio-keys.yaml >>> index cc78c2152921..8fc331e01f7e 100644 >>> --- a/Documentation/devicetree/bindings/input/gpio-keys.yaml >>> +++ b/Documentation/devicetree/bindings/input/gpio-keys.yaml >>> @@ -15,6 +15,9 @@ properties: >>> - gpio-keys >>> - gpio-keys-polled >>> >>> + interrupt-parent: >>> + description: Common interrupt parent for the following subnodes >> >> That's a bit against DT spec: >> >> "Nodes that represent interrupt-generating devices contain an >> interrupt-parent property..." >> >> but gpio-keys node you marked as interrupt-parent does not generate >> interrupts, so I do not think this is correct. > > I think this can be read multiple ways. The device here is gpio-keys and > interrupt-parent would be attached to that node. Children nodes do not > represent individual devices, they just a convenient abstraction to > describe the hardware. Not really. There is no device like "gpio-keys". Each key is a separate, independent device. They are no grouped, they do no share anything. From Linux perspective they share, but on hardware - zero common pieces, independent devices. And this is reflected in interrupts property. Individual devices generating interrupts - so each key connected over GPIO - has interrupts property. Best regards, Krzysztof