linux-kernel - Re: [PATCH v6] clk: Add write operation for clk

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Date:   Tue, 19 Oct 2021 16:32:11 +0300
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Russell King <linux@...linux.org.uk>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Mike Tipton <mdtipton@...eaurora.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Fabio Estevam <festevam@...il.com>
Subject: Re: [PATCH v6] clk: Add write operation for clk_parent debugfs node

On Wed, 13 Oct 2021 at 21:04, Fabio Estevam <festevam@...il.com> wrote:
>
> Hi Sam,
>
> On Wed, Oct 13, 2021 at 2:20 PM Sam Protsenko
> <semen.protsenko@...aro.org> wrote:
> >
> > Useful for testing mux clocks. One can write the index of the parent to
> > be set into clk_parent node, starting from 0. Example
> >
> >     # cd /sys/kernel/debug/clk/mout_peri_bus
> >     # cat clk_possible_parents
> >       dout_shared0_div4 dout_shared1_div4
> >     # cat clk_parent
> >       dout_shared0_div4
> >     # echo 1 > clk_parent
> >     # cat clk_parent
> >       dout_shared1_div4
> >
> > CLOCK_ALLOW_WRITE_DEBUGFS has to be defined in drivers/clk/clk.c in
> > order to use this feature.
> >
> > Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> > Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
>
> This is useful, thanks:
>
> Reviewed-by: Fabio Estevam <festevam@...il.com>

Hi Michael, Stephen,

If there are no outstanding comments, can you please take this one?

Thanks!