linux-kernel - Re: [PATCH 09/13] arm64: dts: rockchip: document explicit px30 cru dependencies

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Date:   Mon, 30 Sep 2019 17:58:11 -0500
From:   Rob Herring <robh@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, linux-rockchip@...ts.infradead.org,
        christoph.muellner@...obroma-systems.com,
        Heiko Stuebner <heiko@...ech.de>
Subject: Re: [PATCH 09/13] arm64: dts: rockchip: document explicit px30 cru
 dependencies

On Tue, 17 Sep 2019 10:26:55 +0200, Heiko Stuebner wrote:
> The px30 contains 2 separate clock controllers the regular cru creating
> most clocks as well as the pmucru managing the GPLL and some other clocks.
> 
> The gpll of course also is needed by the cru, so while we normally do rely
> on clock names to associate clocks getting probed later on (for example
> xin32k coming from an i2c device in most cases) it is safer to declare the
> explicit dependency between the two crus. This makes sure that for example
> the clock-framework probes them in the correct order from the start.
> 
> The assigned-clocks properties were simply working by chance in the past
> so split them accordingly to the 2 crus to honor the loading direction.
> 
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> ---
>  .../bindings/clock/rockchip,px30-cru.txt      |  5 ++++
>  arch/arm64/boot/dts/rockchip/px30.dtsi        | 25 +++++++++++--------
>  2 files changed, 20 insertions(+), 10 deletions(-)
> 

Reviewed-by: Rob Herring <robh@...nel.org>