Message-ID: <dcba75b5-7b62-35aa-6836-5d5edd785002@linaro.org>
Date:   Fri, 17 Feb 2023 16:47:48 +0100
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Subject: Re: [PATCH v3 07/11] dt-bindings: clock: Add StarFive JH7110 system
 clock and reset generator
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To:     Conor Dooley <conor.dooley@microchip.com>,
        Hal Feng <hal.feng@starfivetech.com>
Cc:     Conor Dooley <conor@kernel.org>, linux-riscv@lists.infradead.org,
        devicetree@vger.kernel.org, linux-clk@vger.kernel.org,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Stephen Boyd <sboyd@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Emil Renner Berthing <emil.renner.berthing@canonical.com>,
        linux-kernel@vger.kernel.org
References: <20221220005054.34518-1-hal.feng@starfivetech.com>
 <20221220005054.34518-8-hal.feng@starfivetech.com> <Y6JB37Pd5TZoGMy4@spud>
 <7a7bccb1-4d47-3d32-36e6-4aab7b5b8dad@starfivetech.com>
 <Y6tSWB2+98a8k9Qw@spud>
 <5cf0fe71-fd17-fb28-c01e-28356081ba76@starfivetech.com>
 <Y+5z8skN2DuvxDEL@spud>
 <68e61f28-daec-ce72-726a-1fffe8e94829@starfivetech.com>
 <Y+8x/KSujhgNLAd6@wendy>
 <d3b06d0b-ff17-ebab-bae5-e1ec836fe667@starfivetech.com>
 <Y++B43uCnPQlRYFi@wendy>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <Y++B43uCnPQlRYFi@wendy>
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On 17/02/2023 14:32, Conor Dooley wrote:
>>>> Yes, it is.
>>>
>>> Which would then make GMAC1 RGMII RX optional, rather than required?
>>
>> If thinking in this way, I must say yes, it is optional. But actually
>> GMAC1 RGMII RX feeds gmac1_rx by default. 
>> For a mux, it usually works if you populate only one input to it.
>> Does it mean all the other inputs are optional? And how can we define
>> which input is required?
> 
> I'm not sure, that is a question for Krzysztof and/or Rob.

That's a long thread, please summarize what you ask. Otherwise I have no
clue what is the question.

Does the mux works correctly if clock input is not connected? I mean,
are you now talking about real hardware or some simplification from SW
point of view?

Best regards,
Krzysztof