linux-kernel - Re: [PATCH v2 1/2] arm64: dts: qcom: talos: Flatten usb controller nodes

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Message-ID: <fa3735c3-ac4a-4f98-bca5-a1b75dad0939@oss.qualcomm.com>
Date: Thu, 29 Jan 2026 12:28:16 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Subject: Re: [PATCH v2 1/2] arm64: dts: qcom: talos: Flatten usb controller
 nodes

On 1/28/26 5:09 PM, Krishna Kurapati wrote:
> 
> 
> On 1/28/2026 4:01 PM, Konrad Dybcio wrote:
>> On 1/28/26 7:27 AM, Krishna Kurapati wrote:
>>> Flatten usb controller nodes and update to using latest bindings
>>> and flattened driver approach.
>>>
>>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
>>> Signed-off-by: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
>>> ---
>>
>> Have you checked whether this brings about the same crash-on-suspend
>> issue as it does on Hamoa?
>>
>> https://lore.kernel.org/linux-arm-msm/71c15a78-7a50-4913-b677-e5308fcabfad@packett.cool/
>>
> 
> Hi Konrad,
> 
>  Yes, I did check system suspend use case after flattening and there is no crash seen.
> 
>  The only issue I observed (both before and after flattening) is that waking up from bus suspend, there is an enumeration failure on second port in host mode, and an xHCI CMD_RUN timeout occurs. The issue is gone if we keep controller GDSC flags as RET_ON (not the right solution though). But this issue has nothing to do with flattening. I will sync up with clocks team and try to fix that host mode issue.

diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
index 75716b4a58d6..7e7f4eae8a98 100644
--- a/arch/arm64/boot/dts/qcom/talos.dtsi
+++ b/arch/arm64/boot/dts/qcom/talos.dtsi
@@ -4559,7 +4559,7 @@ usb_2: usb@...8800 {
                                 <&gcc GCC_AGGRE_USB2_SEC_AXI_CLK>,
                                 <&gcc GCC_USB20_SEC_SLEEP_CLK>,
                                 <&gcc GCC_USB20_SEC_MOCK_UTMI_CLK>,
-                                <&gcc GCC_USB2_PRIM_CLKREF_CLK>;
+                                <&gcc GCC_USB3_SEC_CLKREF_CLK>;


?

Konrad