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Message-ID: <d44be821-228b-4035-aa1e-c4f58db90422@quicinc.com>
Date: Thu, 24 Aug 2023 05:02:29 +0530
From: Om Prakash Singh <quic_omprsing@...cinc.com>
To: <neil.armstrong@...aro.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Vinod Koul <vkoul@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: crypto: qcom,prng: document SM8550
On 8/23/2023 1:25 PM, Neil Armstrong wrote:
> Hi,
>
> On 23/08/2023 02:10, Om Prakash Singh wrote:
>>
>>
>> On 8/22/2023 9:34 PM, Konrad Dybcio wrote:
>>> On 22.08.2023 16:54, Om Prakash Singh wrote:
>>>> PRNG Block on most of newer target from Qualcomm have some
>>>> configuration where clock is configured by security firmware.
>>>>
>>>> Adding separate compatible string for each platform is overhead.
>>>>
>>>> We need to introduce common compatible string that can be used for
>>>> all platforms with same configuration.
>>>>
>>>> I would suggest to use "qcom,rng-ee" for newer platform, dropping
>>>> "p" also signifies it is not a Pseudo Random Number Generator.
>>> Please reply inline and don't top-post.
>>>
>>>
>>> Is this what you're trying to say?
>>>
>>> 1. sort out the clock requirements for designs where Linux manages it
>>> vs where the FW does so >
>>> 2. introduce a new compatible for SoCs implementing a TRNG
>>>
>>> 3. for SoCs in 2., register the TRNG as a hwrng device
>>
>> Yes to all
>
> I can send a proposal, but that means writing a new driver for this
> compatible in drivers/char/hw_random/ right ?
We can add hwrng support in same driver like
drivers/crypto/hisilicon/trng/trng.c
As Krzysztof is suggesting we need to have platform specific compatible
string, we can go with your change. for hwrng support I will send
separate patches.
>
> Neil
>
>>
>>>
>>>
>>> ?
>>>
>>> Konrad
>>
>> Thanks,
>> Om
>
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