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[91.139.201.119]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aec6ca7e074sm1002144766b.124.2025.07.23.01.21.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Jul 2025 01:21:36 -0700 (PDT) Message-ID: <3e1d7be9-e99f-41c3-8b0d-aaa426aa9de8@gmail.com> Date: Wed, 23 Jul 2025 11:21:35 +0300 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 Content-Language: en-US To: Krzysztof Kozlowski 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> From: Ivaylo Ivanov In-Reply-To: <20250723-hypnotic-malkoha-of-trust-9efdb6@kuoka> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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 node, because they are a lot. Best regards, Ivaylo > and > allowing DMA for >32 bit. This should be the true reason - what is the > address space and DMA range for children? > > Best regards, > Krzysztof >