linux-kernel - Re: [PATCH 07/15] dt-bindings: clock: Add Ambarella clock bindings

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Date:   Fri, 27 Jan 2023 16:08:09 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Li Chen <me@...ux.beauty>
Cc:     li chen <lchen@...arella.com>,
        michael turquette <mturquette@...libre.com>,
        stephen boyd <sboyd@...nel.org>,
        rob herring <robh+dt@...nel.org>,
        krzysztof kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "moderated list:arm/ambarella soc support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:common clk framework" <linux-clk@...r.kernel.org>,
        "open list:open firmware and flattened device tree bindings" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        arnd bergmann <arnd@...db.de>
Subject: Re: [PATCH 07/15] dt-bindings: clock: Add Ambarella clock bindings

On 27/01/2023 15:48, Li Chen wrote:
>  > 
>  > but what you are saying is that there is no separate clock controller
>  > device with its own IO address but these clocks are part of rct_syscon.
>  > Then model it that way in DTS. The rct_syscon is then your clock
>  > controller and all these fake gclk-core and gclk-ddr nodes should be gone.
> 
> Ok, I will remove these fake nodes, and model the hardware as:
> 
> rct_syscon node
> | clock node(pll, div, mux, composite  clocks live in the same driver)
> | other periphal nodes

You need clock node if it takes any resources. If it doesn't, you do not
need it.

Best regards,
Krzysztof