linux-kernel - Re: [PATCH v4 4/4] arm64: dts: meson-axg: add clock DT info for Meson AXG SoC

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Message-ID: <7ho9nbmked.fsf@baylibre.com>
Date:   Wed, 06 Dec 2017 16:50:02 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Yixun Lan <yixun.lan@...ogic.com>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Carlo Caione <carlo@...one.org>,
        Qiufang Dai <qiufang.dai@...ogic.com>,
        <linux-amlogic@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 4/4] arm64: dts: meson-axg: add clock DT info for Meson AXG SoC

Yixun Lan <yixun.lan@...ogic.com> writes:

> From: Qiufang Dai <qiufang.dai@...ogic.com>
>
> Try to add Hiubus DT info, and also enable clock DT info
> for the Amlogic's Meson-AXG SoC.
>
> Acked-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Qiufang Dai <qiufang.dai@...ogic.com>
> Signed-off-by: Yixun Lan <yixun.lan@...ogic.com>
> ---
>  arch/arm64/boot/dts/amlogic/meson-axg.dtsi | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> index b932a784b02a..36a2e98338a8 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> @@ -7,6 +7,7 @@
>  #include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/interrupt-controller/irq.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/axg-clkc.h>

This #include will cause an unnessary dependency from the amlogic tree
to the clock tree even though this patch is not currently using any of
the #defines from that header.  It will simplify the dependencies if you
drop this #include from this patch.

In my comment on the cover letter, I suggested adding a patch that also
switches the UART over to the new clock provider.  That is the patch
that should add this #include, since it will actually need #defines from
the header.

Doing it in that order means that we could merge this patch
independently of the clock driver, and then merge the UART switch-over
patch only after the driver (and headers) are merged.

Kevin