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 B1B71350D7C; Wed, 17 Dec 2025 12:42:32 +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=1765975352; cv=none; b=PMKu06GNvhiOIa3im9LCq3F3gbqpi39VlIGyFSaiHmDwM/xJEXvoGrRJgD/LbeyUoxir+nuPHWwk4FtqI2MG4nfjwA2zgEKC6+EqMOHvSVV/QN5BMu+PJF5lYCbz1Z2k6pyH+1frRNrR96AL99ByHS3RDEchKxIzXb5nR91ys4Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765975352; c=relaxed/simple; bh=sx3hyoBwce7MSoT+frzQaREOQzH8lpEqmAbCR4rwtBA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=WxR8BUgT4rAIhxoMZ948BHPVjn518cNp1qZQrrLC7N4yAPdwPsdDRnLHIkiCWtceLEfex52RA+bKahu0xEYUF+UyMcZVA1sXToAmBe7I0fIe5JpbsufWWHYKgI1KjuSVeniMh1sGHWnmwXXDe5FFW+CaUjIXQCu72nwYmGn9Uzs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bN0q6zh3; 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="bN0q6zh3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A901AC4CEF5; Wed, 17 Dec 2025 12:42:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765975352; bh=sx3hyoBwce7MSoT+frzQaREOQzH8lpEqmAbCR4rwtBA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=bN0q6zh3dZNJMk9AXqU02kgYh+HPyTd2ERCYB4nQ4qcEMBbTl6lXpX8n6xv73uGuE wQqyRndOCo9qbnlHH/lngcOcCRnMqvFP6TFj55QO5skpSYJ74rwP7zQW9dMbynrdAH fww9I17+5Z+Hp57f+9bqr+FMy4sTAkY5tRVDGWoDnmo2ii2g2GLL4LHanVQO1ck2ee ZD/+VAW4SizVh8/NKBU/K5SGkCnFHVl0Dvbl4gOlH+kt56MnRsSm4V3kqlh9lMJbng cYSCKOcVF/H6jlHh7RwM9fRiOrPuLUY800Km+ivIbIIqOo9YBSRrDf231S5O2u2Iof V8tkD0oVkQikw== Message-ID: <8c50d838-2f41-4539-bc96-ccdc521c8014@kernel.org> Date: Wed, 17 Dec 2025 13:42:28 +0100 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: [PATCH] arm64: dts: xilinx: Drop "label" property on dlg,slg7xl45106 To: Michal Simek , "Rob Herring (Arm)" , Krzysztof Kozlowski , Conor Dooley Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20251216175914.2791200-1-robh@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 17/12/2025 13:38, Michal Simek wrote: > > > On 12/16/25 18:59, Rob Herring (Arm) wrote: >> The "label" property is not documented for the dlg,slg7xl45106. Nor is >> it common to use for GPIO controllers. So drop it. >> > > Correct it is not documented but it is at least used in Linux also by > drivers/gpio/gpio-mmio.c:810: err = device_property_read_string(dev, "label", > &label); > > which is also not documented in DT binding. > > I don't have a problem with it because I can't see it used anywhere. > > But there are other devices where label is the part of binding. And IMHO this > should be more generic property. No, please read the EXPLICIT comment: "+ * This property *must not* be used in device-tree sources, it's only" It was added only for ACPI. We have indeed the problem with documenting disallowed ABI for cases where drivers use fwnode/device_property(). So far I insisted on comments, but as we can see people can just ignore the comments and still use something explicitly disallowed. Rob, Would it be okay to add for such cases "label: false" in the binding to mark that this is not ABI for DT? Best regards, Krzysztof