linux-kernel - Re: [PATCH 14/14] clk: meson: rework and clean drivers dependencies

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Date:   Tue, 29 Jan 2019 10:09:15 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 14/14] clk: meson: rework and clean drivers dependencies

Quoting Jerome Brunet (2019-01-28 10:04:30)
> Initially, the meson clock directory only hosted 2 controllers drivers,
> for meson8 and gxbb. At the time, both used the same set of clock drivers
> so managing the dependencies was not a big concern.
> 
> Since this ancient time, entropy did its job, controllers with different
> requirement and specific clock drivers have been added. Unfortunately, we
> did not do a great job at managing the dependencies between the
> controllers and the different clock drivers. Some drivers, such as
> clk-phase or vid-pll-div, are compiled even if they are useless on the
> target (meson8). As we are adding new controllers, we need to be able to
> pick a driver w/o pulling the whole thing.
> 
> The patch aims to clean things up by:
> * providing a dedicated CONFIG_ for each clock drivers
> * allowing clock drivers to be compiled as a modules, if possible
> * stating explicitly which drivers are required by each controller.
> 
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>

Sounds good to me.

> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
> index 2b9490dd9878..8baec10a49a1 100644
> --- a/drivers/clk/meson/Makefile
> +++ b/drivers/clk/meson/Makefile
> @@ -2,12 +2,17 @@
>  # Makefile for Meson specific clk
>  #
>  

Add a comment here that these are all the clk library parts or something
like that?

> -obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-mpll.o clk-phase.o vid-pll-div.o
> -obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-input.o clk-dualdiv.o
> -obj-$(CONFIG_COMMON_CLK_AMLOGIC_AUDIO) += sclk-div.o
> -obj-$(CONFIG_COMMON_CLK_MESON_AO) += meson-aoclk.o
> +obj-$(CONFIG_COMMON_CLK_MESON_INPUT) += clk-input.o
> +obj-$(CONFIG_COMMON_CLK_MESON_REGMAP) += clk-regmap.o
> +obj-$(CONFIG_COMMON_CLK_MESON_DUALDIV) += clk-dualdiv.o
> +obj-$(CONFIG_COMMON_CLK_MESON_MPLL) += clk-mpll.o
> +obj-$(CONFIG_COMMON_CLK_MESON_PHASE) += clk-phase.o
> +obj-$(CONFIG_COMMON_CLK_MESON_PLL) += clk-pll.o
> +obj-$(CONFIG_COMMON_CLK_MESON_SCLK_DIV) += sclk-div.o
> +obj-$(CONFIG_COMMON_CLK_MESON_VID_PLL_DIV) += vid-pll-div.o
> +obj-$(CONFIG_COMMON_CLK_MESON_AO_CLKC) += meson-aoclk.o
> +

And maybe add a comment here indicating that SoC drivers go below?

>  obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o
> -obj-$(CONFIG_COMMON_CLK_GXBB)   += gxbb.o gxbb-aoclk.o
> -obj-$(CONFIG_COMMON_CLK_AXG)    += axg.o axg-aoclk.o
> -obj-$(CONFIG_COMMON_CLK_AXG_AUDIO)     += axg-audio.o
> -obj-$(CONFIG_COMMON_CLK_REGMAP_MESON)  += clk-regmap.o
> +obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o
> +obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o
> +obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o

And sort them by config name alphanumerically?