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[79.139.233.37]) by smtp.googlemail.com with ESMTPSA id d5sm10202535ljc.51.2019.11.19.08.57.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 Nov 2019 08:57:23 -0800 (PST) Subject: Re: [PATCH v1 02/29] dt-bindings: memory: tegra20: emc: Document new interconnect property To: Thierry Reding Cc: Jonathan Hunter , Peter De Schrijver , Mikko Perttunen , Georgi Djakov , Rob Herring , linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org References: <20191118200247.3567-1-digetx@gmail.com> <20191118200247.3567-3-digetx@gmail.com> <20191119062156.GB2462695@ulmo> From: Dmitry Osipenko Message-ID: Date: Tue, 19 Nov 2019 19:57:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: <20191119062156.GB2462695@ulmo> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org 19.11.2019 09:21, Thierry Reding пишет: > On Mon, Nov 18, 2019 at 11:02:20PM +0300, Dmitry Osipenko wrote: >> External memory controller is interconnected with memory controller and >> with external memory. Document new interconnect property which designates >> external memory controller as interconnect provider. >> >> Signed-off-by: Dmitry Osipenko >> --- >> .../bindings/memory-controllers/nvidia,tegra20-emc.txt | 4 ++++ >> 1 file changed, 4 insertions(+) > > Do we really want to describe this particular connection? It's pretty > static and the only real connection here is the EMC frequency, so the > whole interconnect infrastructure seems a bit overkill. > > Sounds to me like we could piggyback on top of the existing > nvidia,memory-controller property of the EMC to make the connection. Ultimately each memory client talks to EMEM through MC and EMC, although it should be okay to ignore the EMEM from a driver's / software perspective. [snip]