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 95A821465A5; Fri, 25 Jul 2025 07:37:15 +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=1753429035; cv=none; b=qYvTBZUoOEQh8KAhX++ZEap6vbbiUPQl0AXRiL+xN+Ryj66c2agpCj6T3uQ+WmZwFFSjNJ+uP+o4dJZTxVs6Wdx2kHYUUKzqnrUsXtcBeL36A7Jr/D8GDPro2iuWLR1uFc2I/Hp6EmYMbFMsK63CbWvHPOSyEVcZLuiLME2WYqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753429035; c=relaxed/simple; bh=Y6cUVQBCiqpdUy+2d+nrCzSPiT4iFPP1LHs4gH+8b2A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BYB/gsDSFy1mn4r2EnzXhtWU01XkAtDn99fJxpBFudpe1dd79Rdueyu9PhEg9wwTSGiBa8FKn8oPOEjoaFJ7M0JDaeMNUVSv/wdP49OZq77kThe3raSHSIAMgtTDePfSCCbxBmZDYOs694AXC7WLyTzsBT7rRe/UgeIUURgK8lA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VfTMcTxS; 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="VfTMcTxS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE810C4CEE7; Fri, 25 Jul 2025 07:37:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753429035; bh=Y6cUVQBCiqpdUy+2d+nrCzSPiT4iFPP1LHs4gH+8b2A=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=VfTMcTxSTHLvRE5/d4HaOZmH1wCbDKhKYll15hsCH1t7w2kp/bu32kOYvpZ1nn33v MFneGjHKkJTgxwnMEmmS3vLQkXU3BwbvC6II7CLHH2eqkde9zbzSbJtf+5IwpipL5n IMnIg3Ap5YGLUMEhg/gbBRJ0/xMSVxaaoLVXJ8JvEoyo5InQxz9l9J5kLAF9eO1NuS w0s/GRVLCHu5jUqpfYIZT5R9iFNJ3tNBY2ExIqo7/qPq+xtEBwoOSGFjil91hOHukc 3V2K4EJT6PHt2XaHUUkdIRkCS0BYH8waTW5ckseSnhge2GWTml9Z9+I7xtcVblfz1W YMATHmMNeFe1w== Message-ID: Date: Fri, 25 Jul 2025 09:37:11 +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 v1 1/2] dt-bindings: soc: samsung: usi: allow 64-bit address space To: Ivaylo Ivanov Cc: Krzysztof Kozlowski , Alim Akhtar , Sam Protsenko , Rob Herring , Conor Dooley , linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250722121037.443385-1-ivo.ivanov.ivanov1@gmail.com> <20250723-hypnotic-malkoha-of-trust-9efdb6@kuoka> <3e1d7be9-e99f-41c3-8b0d-aaa426aa9de8@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGVBBMBCgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJoF1BKBQkWlnSaAAoJEBuTQ307 QWKbHukP/3t4tRp/bvDnxJfmNdNVn0gv9ep3L39IntPalBFwRKytqeQkzAju0whYWg+R/rwp +r2I1Fzwt7+PTjsnMFlh1AZxGDmP5MFkzVsMnfX1lGiXhYSOMP97XL6R1QSXxaWOpGNCDaUl ajorB0lJDcC0q3xAdwzRConxYVhlgmTrRiD8oLlSCD5baEAt5Zw17UTNDnDGmZQKR0fqLpWy 786Lm5OScb7DjEgcA2PRm17st4UQ1kF0rQHokVaotxRM74PPDB8bCsunlghJl1DRK9s1aSuN hL1Pv9VD8b4dFNvCo7b4hfAANPU67W40AaaGZ3UAfmw+1MYyo4QuAZGKzaP2ukbdCD/DYnqi tJy88XqWtyb4UQWKNoQqGKzlYXdKsldYqrLHGoMvj1UN9XcRtXHST/IaLn72o7j7/h/Ac5EL 8lSUVIG4TYn59NyxxAXa07Wi6zjVL1U11fTnFmE29ALYQEXKBI3KUO1A3p4sQWzU7uRmbuxn naUmm8RbpMcOfa9JjlXCLmQ5IP7Rr5tYZUCkZz08LIfF8UMXwH7OOEX87Y++EkAB+pzKZNNd hwoXulTAgjSy+OiaLtuCys9VdXLZ3Zy314azaCU3BoWgaMV0eAW/+gprWMXQM1lrlzvwlD/k whyy9wGf0AEPpLssLVt9VVxNjo6BIkt6d1pMg6mHsUEVzsFNBFVDXDQBEADNkrQYSREUL4D3 Gws46JEoZ9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLue MNsWLJBvBaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6ei OMheesVS5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wA GldWsRxbf3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA 6z6lBZn0WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9 YegxWKvXXHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt 91pFzBSOIpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gU BLHFTg2hYnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/ JoFzZ4B0p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu 4vXVFBYIGmpyNPYzRm0QPwARAQABwsF8BBgBCgAmAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtB YpsFAmgXUF8FCRaWWyoACgkQG5NDfTtBYptO0w//dlXJs5/42hAXKsk+PDg3wyEFb4NpyA1v qmx7SfAzk9Hf6lWwU1O6AbqNMbh6PjEwadKUk1m04S7EjdQLsj/MBSgoQtCT3MDmWUUtHZd5 RYIPnPq3WVB47GtuO6/u375tsxhtf7vt95QSYJwCB+ZUgo4T+FV4hquZ4AsRkbgavtIzQisg Dgv76tnEv3YHV8Jn9mi/Bu0FURF+5kpdMfgo1sq6RXNQ//TVf8yFgRtTUdXxW/qHjlYURrm2 H4kutobVEIxiyu6m05q3e9eZB/TaMMNVORx+1kM3j7f0rwtEYUFzY1ygQfpcMDPl7pRYoJjB dSsm0ZuzDaCwaxg2t8hqQJBzJCezTOIkjHUsWAK+tEbU4Z4SnNpCyM3fBqsgYdJxjyC/tWVT AQ18NRLtPw7tK1rdcwCl0GFQHwSwk5pDpz1NH40e6lU+NcXSeiqkDDRkHlftKPV/dV+lQXiu jWt87ecuHlpL3uuQ0ZZNWqHgZoQLXoqC2ZV5KrtKWb/jyiFX/sxSrodALf0zf+tfHv0FZWT2 zHjUqd0t4njD/UOsuIMOQn4Ig0SdivYPfZukb5cdasKJukG1NOpbW7yRNivaCnfZz6dTawXw XRIV/KDsHQiyVxKvN73bThKhONkcX2LWuD928tAR6XMM2G5ovxLe09vuOzzfTWQDsm++9UKF a/A= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 24/07/2025 09:02, Ivaylo Ivanov wrote: > On 7/24/25 09:56, Krzysztof Kozlowski wrote: >> On 23/07/2025 10:21, Ivaylo Ivanov wrote: >>> On 7/23/25 11:15, Krzysztof Kozlowski wrote: >>>> On Tue, Jul 22, 2025 at 03:10:36PM +0300, Ivaylo Ivanov wrote: >>>>> Some device trees, like the exynos2200 one, configure the root node >>>>> with #address-cells and #size-cells set to 2. However, the usi binding >>>>> expects 32 bit address space only. Allow these determining properties to >>>> So if USI expects 32 bit, then why do we allow 64? >>>> >>>> Switching this to 2 means you use 64-bit addressing for children >>> I don't, but the main point was to avoid defining ranges for every single usi >> I do not understand your "I don't", because you do. > > I meant it in the "I don't _need_ to explicitly use that, but it's _nice_ to have" > way, so I don't have to clutter the nodes with address translations in ranges. It is not nice to have. The address space should not grow above the device limits or even above the needs (sometime ago Rob explicitly asked for that). Changing to 64-bit just because you do not want to add ranges property is not correct, because it misses the main point: what is the address space? Changing to 64-bit because that's the address space would be fine, but that was not argued here. I did not check in the datasheets, but I assume these devices want 32-bit address space and that's how it should stay. Best regards, Krzysztof