From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Hiren Gohel <hiren.gohel@oss.qualcomm.com>,
Vinod Koul <vkoul@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
Manivannan Sadhasivam <mani@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: phy: qcom: Add SA8797P eUSB2 PHY
Date: Tue, 27 Oct 2026 12:00:40 +0100 [thread overview]
Message-ID: <0032f652-4ba1-4a52-9241-635207f0caa1@oss.qualcomm.com> (raw)
In-Reply-To: <20261026094118.3264112-2-hiren.gohel@oss.qualcomm.com>
On 10/26/26 10:41 AM, Hiren Gohel wrote:
> SA8797p platform abstracts resources such as resets, clocks and
> regulators in firmware. 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
next prev parent reply other threads:[~2026-10-27 11:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-26 9:41 [PATCH 0/2] Add support for SA8797P in the phy-snps-eusb2 phy driver Hiren Gohel
2026-10-26 9:41 ` [PATCH 1/2] dt-bindings: phy: qcom: Add SA8797P eUSB2 PHY Hiren Gohel
2026-10-27 11:00 ` Konrad Dybcio [this message]
2026-10-26 9:41 ` [PATCH 2/2] phy: snps-eusb2: Add support for SA8797P Hiren Gohel
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