From: Andrew Lunn <andrew@lunn.ch>
To: Jie Luo <quic_luoj@quicinc.com>
Cc: andersson@kernel.org, konrad.dybcio@linaro.org,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
conor+dt@kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, quic_kkumarcs@quicinc.com,
quic_suruchia@quicinc.com, quic_soni@quicinc.com,
quic_pavir@quicinc.com, quic_souravp@quicinc.com,
quic_linchen@quicinc.com, quic_leiwei@quicinc.com
Subject: Re: [PATCH 3/6] arm64: dts: qcom: ipq5332: Add MDIO device tree
Date: Tue, 16 Jan 2024 23:56:52 +0100 [thread overview]
Message-ID: <6975e79a-67eb-46d7-8445-92610b8b5198@lunn.ch> (raw)
In-Reply-To: <5c88945b-4a80-4346-a77c-82a68ae02047@quicinc.com>
> Another one is the MDIO slave(gpio25, 26), which is dedicated
> for receiving the back pressure signal from the connected Ethernet switch
> device QCA8386.
>
> There is a MDIO master block integrated in QCA8386 switch device, this
> integrated MDIO master is dedicated for generating the back
> pressure signal to IPQ5332 SoC.
>
> This MDIO slave block of IPQ5322 just needs to configure these PIN
> mux for MDC and MDIO PINs. No additional driver is needed for this MDIO
> slave block of IPQ5332.
So there is a proprietary protocol running over the MDIO bus? And its
completely implemented in hardware in the slave block? Is this even
MDIO? Does it use c22 or c45 bus transactions? How is the slave
address configured, or is that also hard coded?
Andrew
next prev parent reply other threads:[~2024-01-16 22:56 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-10 11:20 [PATCH 0/6] Add PPE device tree node for Qualcomm IPQ SoC Luo Jie
2024-01-10 11:20 ` [PATCH 1/6] arm64: dts: qcom: ipq9574: Add PPE device tree node Luo Jie
2024-01-10 11:40 ` Krzysztof Kozlowski
2024-01-11 15:30 ` Jie Luo
2024-01-11 16:06 ` Dmitry Baryshkov
2024-01-12 14:40 ` Jie Luo
2024-01-12 14:51 ` Krzysztof Kozlowski
2024-01-22 12:58 ` Jie Luo
2024-01-12 15:03 ` Dmitry Baryshkov
2024-01-17 15:10 ` Jie Luo
2024-01-10 11:20 ` [PATCH 2/6] arm64: dts: qcom: ipq5332: " Luo Jie
2024-01-10 11:20 ` [PATCH 3/6] arm64: dts: qcom: ipq5332: Add MDIO device tree Luo Jie
2024-01-10 11:56 ` Krzysztof Kozlowski
2024-01-12 16:11 ` Jie Luo
2024-01-10 13:35 ` Andrew Lunn
2024-01-11 15:59 ` Jie Luo
2024-01-11 16:13 ` Dmitry Baryshkov
2024-01-12 15:58 ` Jie Luo
2024-01-11 16:30 ` Andrew Lunn
2024-01-12 16:05 ` Jie Luo
2024-01-16 22:56 ` Andrew Lunn [this message]
2024-01-17 15:10 ` Jie Luo
2024-01-11 16:43 ` Krzysztof Kozlowski
2024-01-10 11:20 ` [PATCH 4/6] arm64: dts: qcom: ipq9574: " Luo Jie
2024-01-10 11:20 ` [PATCH 5/6] arm64: dts: qcom: ipq5332: Add RDP441 board " Luo Jie
2024-01-10 11:57 ` Krzysztof Kozlowski
2024-01-17 15:16 ` Lei Wei
2024-01-10 11:20 ` [PATCH 6/6] arm64: dts: qcom: ipq9574: Add RDP433 " Luo Jie
2024-01-12 15:05 ` Dmitry Baryshkov
2024-01-17 15:12 ` Lei Wei
2024-01-10 11:32 ` [PATCH 0/6] Add PPE device tree node for Qualcomm IPQ SoC Konrad Dybcio
2024-01-12 14:55 ` Jie Luo
2024-01-10 12:13 ` Krzysztof Kozlowski
2024-01-12 15:00 ` Jie Luo
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