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SubjectRe: [PATCH 2/8] dt-bindings: crypto : Add new compatible strings for qcom-qce
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On 3/17/21 9:20 AM, Bhupesh Sharma wrote:
> Hi Rob,
>
> Thanks for your review.
>
> On Wed, 17 Mar 2021 at 03:58, Rob Herring <robh@kernel.org> wrote:
>>
>> On Wed, Mar 10, 2021 at 10:54:57AM +0530, Bhupesh Sharma wrote:
>>> Newer qcom chips support newer versions of the qce IP, so add
>>> new compatible strings for qcom-qce (in addition to the existing
>>> "qcom,crypto-v5.1").
>>>
>>> With [1], Thara tried to add the support for new compatible strings,
>>> but we couldn't conclude on the approach to be used. Since we have
>>> a number of new qcom arm64 SoCs available now, several of which
>>> support the same crypto IP version, so it makes more sense to use
>>> the IP version for the compatible string, rather than using the soc
>>> name as the compatible string.
>>>
>>> [1]. https://lore.kernel.org/linux-arm-msm/20201119155233.3974286-7-thara.gopinath@linaro.org/
>>>
>>> Cc: Thara Gopinath <thara.gopinath@linaro.org>
>>> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
>>> Cc: Rob Herring <robh+dt@kernel.org>
>>> Cc: Andy Gross <agross@kernel.org>
>>> Cc: Herbert Xu <herbert@gondor.apana.org.au>
>>> Cc: David S. Miller <davem@davemloft.net>
>>> Cc: Stephen Boyd <sboyd@kernel.org>
>>> Cc: Michael Turquette <mturquette@baylibre.com>
>>> Cc: linux-clk@vger.kernel.org
>>> Cc: linux-crypto@vger.kernel.org
>>> Cc: devicetree@vger.kernel.org
>>> Cc: linux-kernel@vger.kernel.org
>>> Cc: bhupesh.linux@gmail.com
>>> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
>>> ---
>>> Documentation/devicetree/bindings/crypto/qcom-qce.txt | 6 +++++-
>>> 1 file changed, 5 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/crypto/qcom-qce.txt b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
>>> index 07ee1b12000b..217b37dbd58a 100644
>>> --- a/Documentation/devicetree/bindings/crypto/qcom-qce.txt
>>> +++ b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
>>> @@ -2,7 +2,11 @@ Qualcomm crypto engine driver
>>>
>>> Required properties:
>>>
>>> -- compatible : should be "qcom,crypto-v5.1"
>>> +- compatible : Supported versions are:
>>> + - "qcom,crypto-v5.1", for ipq6018
>>> + - "qcom,crypto-v5.4", for sdm845, sm8150
>>
>> 2 SoCs sharing 1 version doesn't convince me on using version numbers.
>> Having 4 versions for 5 SoCs further convinces me you should stick with
>> SoC specific compatibles as *everyone* else does (including most QCom
>> bindings).

Hi!

So, it is 2 SoCs today. But we do have a bunch of SoCs for each version
and these could be added in future. I think I have asked this question
before as well,how about "qcom,sdm845-crypto", "qcom,crypto-v5.4" and
have only "qcom,crypto-<version>" in the driver ? I see this being done
by some Qcom bindings.


> Fair enough. I will add SoC specific compatibles in v2, which should
> be out shortly.
>
> Regards,
> Bhupesh
>
>>> + - "qcom,crypto-v5.5", for sm8250
>>> + - "qcom,crypto-v5.6", for sm8350
>>> - reg : specifies base physical address and size of the registers map
>>> - clocks : phandle to clock-controller plus clock-specifier pair
>>> - clock-names : "iface" clocks register interface
>>> --
>>> 2.29.2
>>>

--
Warm Regards
Thara

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