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From: Melody Olvera <quic_molvera@quicinc.com>
To: Trilok Soni <quic_tsoni@quicinc.com>,
	Konrad Dybcio <konradybcio@gmail.com>,
	Konrad Dybcio <konradybcio@kernel.org>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	Souradeep Chowdhury <quic_schowdhu@quicinc.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Satya Durga Srinivasu Prabhala" <quic_satyap@quicinc.com>,
	Elson Serrao <quic_eserrao@quicinc.com>
Cc: <cros-qcom-dts-watchers@chromium.org>,
	<linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>
Subject: Re: [PATCH v1 1/3] dt-bindings: soc: qcom: eud: Update compatible strings for eud
Date: Tue, 20 Aug 2024 11:21:04 -0700	[thread overview]
Message-ID: <81ec34a6-8627-4a59-8fc7-87eee4625b2d@quicinc.com> (raw)
In-Reply-To: <f8caa9aa-7fc4-4d42-9011-21ca40eb106d@quicinc.com>



On 8/14/2024 3:09 PM, Trilok Soni wrote:
> On 8/14/2024 1:25 PM, Konrad Dybcio wrote:
>>> Unfortunately, no. We considered several options, but none guarantee that we will avoid
>>> a crash if we try non-securely. The secure call also won't give a specific error if it fails either
>>> (for security reasons) so we can't know if a secure access failed because it's supposed to be
>>> accessed non-securely or for another reason; hence this approach. If there's
>>> another way to achieve this functionality that might be better, I'm all ears.
>> Can we read some fuse values and decide based on that?
> In most of the cases, these fuse values are not allowed to be read
> from the Linux, so that will be another problem. Melody can check
> if there is any fuse values around here and possible to read them
> through Linux.
>

I double-checked, but there really isn't any kind of fuse or anything we 
can read to determine
how we need to access these registers. I remembered checking before 
authoring these patches,
but I wanted to just make sure before responding here.

Thanks,
Melody

  reply	other threads:[~2024-08-20 18:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-07 18:32 [PATCH v1 0/3] Add compatibles for different eud access modes Melody Olvera
2024-08-07 18:32 ` [PATCH v1 1/3] dt-bindings: soc: qcom: eud: Update compatible strings for eud Melody Olvera
2024-08-08 11:00   ` Krzysztof Kozlowski
2024-08-13 20:03     ` Melody Olvera
2024-08-14  6:15       ` Krzysztof Kozlowski
2024-08-14 10:30         ` Konrad Dybcio
2024-08-14 17:33           ` Melody Olvera
2024-08-14 20:25             ` Konrad Dybcio
2024-08-14 22:09               ` Trilok Soni
2024-08-20 18:21                 ` Melody Olvera [this message]
2024-08-20 19:19                   ` Konrad Dybcio
2024-08-21  6:48                     ` Krzysztof Kozlowski
2024-08-21 17:27                       ` Konrad Dybcio
2024-08-14 17:20         ` Melody Olvera
2024-08-07 18:32 ` [PATCH v1 2/3] usb: misc: qcom_eud: Access mode manager through secure calls Melody Olvera
2024-08-07 18:32 ` [PATCH v1 3/3] arm64: dts: qcom: sc7280: Update eud compatible string Melody Olvera
2024-08-08 11:03   ` Krzysztof Kozlowski
2024-08-13 20:05     ` Melody Olvera

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