linux-kernel - Re: [PATCH 1/3] clk: fix redefinition of clk_prepare on MIPS with HAVE_LEGACY

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Message-ID: <20201118074812.GA5803@kozik-lap>
Date:   Wed, 18 Nov 2020 08:48:12 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        devel@...verdev.osuosl.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 1/3] clk: fix redefinition of clk_prepare on MIPS with
 HAVE_LEGACY_CLK

On Tue, Nov 17, 2020 at 11:41:57PM -0800, Stephen Boyd wrote:
> Quoting Krzysztof Kozlowski (2020-11-15 09:09:48)
> > COMMON_CLK even though is a user-selectable symbol, is still selected by
> > multiple other config options.  COMMON_CLK should not be used when
> > legacy clocks are provided by architecture, so it correctly depends on
> > !HAVE_LEGACY_CLK.
> > 
> > However it is possible to create a config which selects both COMMON_CLK
> > (by SND_SUN8I_CODEC) and HAVE_LEGACY_CLK (by SOC_RT305X) which leads to
> 
> Why is SND_SUN8I_CODEC selecting COMMON_CLK? Or really, why is
> SOC_RT305X selecting HAVE_LEGACY_CLK?

The SND_SUN8I_CODEC I fixed in following patch (I sent separately v2 of
it).

The SOC_RT305X select HAVE_LEGACY_CLK? because it is an old, Ralink
platform, not converted to Common clock frm. Few clock operations are
defined in: arch/mips/ralink/clk.c

Best regards,
Krzysztof