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Tue, 27 Oct 2026 04:00:44 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b4458dd28fsm4706281a12.3.2026.10.27.04.00.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Oct 2026 04:00:43 -0700 (PDT) Message-ID: <0032f652-4ba1-4a52-9241-635207f0caa1@oss.qualcomm.com> Date: Tue, 27 Oct 2026 12:00:40 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: phy: qcom: Add SA8797P eUSB2 PHY To: Hiren Gohel , Vinod Koul , Neil Armstrong , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Manivannan Sadhasivam Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261026094118.3264112-1-hiren.gohel@oss.qualcomm.com> <20261026094118.3264112-2-hiren.gohel@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261026094118.3264112-2-hiren.gohel@oss.qualcomm.com> Content-Type: text/plain; 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The SCMI firmware exposes multiple protocols to > control such resources which are identified by protocol_id. > > For this USB phy, 2 SCMI protocols are exposed by the firmware: > * power domain management protocol (protocol_id=0x11) > * performance domain management protocol (protocol_id=0x13) > > The power domain has 2 indices: 'core' and 'transfer'. > * core controls the regulators, the clocks and the reset > * transfer only controls the clocks > > For example, to power on/off the PHY, we should use the 'core' domain. > To disable data transfer and keeping power enabled, we should use the > 'transfer' domain. > > Add a new binding for the Synopsys eusb2 High-Speed USB PHY > found in SA8797P. > > Note: the performance domain (0x13) exposes opaques values (0xa to 0x11) > for which we don't have any information. How come we don't have any information for what the firmware that ""we"" wrote does? Konrad