linux-kernel - Re: [PATCH v3 06/11] clk: tegra: remove EMC to MC clock mux in Tegra114

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Message-ID: <CAPVz0n2gUT5aOT3S05Up+vAiMBf5jmthRV_7z_fpj9RsPWEg_w@mail.gmail.com>
Date: Thu, 13 Nov 2025 16:21:24 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Stephen Boyd <sboyd@...nel.org>
Cc: Chanwoo Choi <cw00.choi@...sung.com>, Conor Dooley <conor+dt@...nel.org>, 
	Dmitry Osipenko <digetx@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, 
	Krzysztof Kozlowski <krzk@...nel.org>, Kyungmin Park <kyungmin.park@...sung.com>, 
	Michael Turquette <mturquette@...libre.com>, Mikko Perttunen <mperttunen@...dia.com>, 
	MyungJoo Ham <myungjoo.ham@...sung.com>, Prashant Gaikwad <pgaikwad@...dia.com>, 
	Rob Herring <robh@...nel.org>, Thierry Reding <thierry.reding@...il.com>, 
	Thierry Reding <treding@...dia.com>, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-tegra@...r.kernel.org, 
	linux-clk@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 06/11] clk: tegra: remove EMC to MC clock mux in Tegra114

нд, 21 вер. 2025 р. о 20:54 Stephen Boyd <sboyd@...nel.org> пише:
>
> Quoting Svyatoslav Ryhel (2025-09-15 01:01:52)
> > diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
> > index 8bde72aa5e68..6b3a140772c2 100644
> > --- a/drivers/clk/tegra/clk-tegra114.c
> > +++ b/drivers/clk/tegra/clk-tegra114.c
> > @@ -1321,6 +1309,28 @@ static int tegra114_reset_deassert(unsigned long id)
> >         return 0;
> >  }
> >
> > +#ifdef CONFIG_TEGRA124_CLK_EMC
> > +static struct clk *tegra114_clk_src_onecell_get(struct of_phandle_args *clkspec,
> > +                                               void *data)
> > +{
> > +       struct clk_hw *hw;
> > +       struct clk *clk;
> > +
> > +       clk = of_clk_src_onecell_get(clkspec, data);
> > +       if (IS_ERR(clk))
> > +               return clk;
> > +
> > +       hw = __clk_get_hw(clk);
>
> Can you just use of_clk_hw_onecell_get() instead? Then we don't need to
> use __clk_get_hw(). Or is this whole function used to return a clk
> pointer to something that isn't the clk framework?
>

This logic was adopted from Tegra124 driver, but of_clk_hw_onecell_get
might be applicable. I will adjust to use it and if all works as
expected, I will apply it in v4. Thank you.

> > +
> > +       if (clkspec->args[0] == TEGRA114_CLK_EMC) {
> > +               if (!tegra124_clk_emc_driver_available(hw))
> > +                       return ERR_PTR(-EPROBE_DEFER);
> > +       }
> > +
> > +       return clk;