linux-kernel - Re: [PATCH v4 1/4] clk: renesas: rzg2l-cpg: Move PM domain power on in rzg2l_cpg_pd

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Message-ID: <CAMuHMdWKSDDvOciYTMdH=ZU2j9G3nyrXdSmf6UpqkBP31vV=VA@mail.gmail.com>
Date: Thu, 24 Oct 2024 12:02:45 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Claudiu <claudiu.beznea@...on.dev>
Cc: mturquette@...libre.com, sboyd@...nel.org, wim@...ux-watchdog.org, 
	linux@...ck-us.net, ulf.hansson@...aro.org, linux-renesas-soc@...r.kernel.org, 
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-watchdog@...r.kernel.org, linux-pm@...r.kernel.org, 
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v4 1/4] clk: renesas: rzg2l-cpg: Move PM domain power on
 in rzg2l_cpg_pd_setup()

On Tue, Oct 15, 2024 at 6:48 PM Claudiu <claudiu.beznea@...on.dev> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>
> Move the PM domain power on in rzg2l_cpg_pd_setup(). With this the
> previously always-on power domains got
> struct generic_pm_domain::{power_on, power_off} populated (and
> registered with simple_qos_governor if #power-domain-cells = <1> and
> with pm_domain_always_on_gov if #power-domain-cells = <0>). The values for
> struct generic_pm_domain::{power_on, power_off} are now populated for
> all registered domains but used by core only for the domains that can
> use them (the PM domain should be non always-on and registered with
> simple_qos_governor). Moreover, the power on/off functions check if the
> mstop support is valid. The mstop is populated only by the RZ/G3S
> initialization code at the moment.
>
> This approach was chosen to keep the code simple and use the same code
> across different implementations. There should be no issues with this
> approach as the always on domains are registered with GENPD_FLAG_ALWAYS_ON
> and the PM domain core takes care of it.
>
> This approach allows doing further cleanups on the rzg2l_cpg power domain
> registering code that will be handled by the next commit.
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> ---
>
> Changes in v4:
> - call rzg2l_cpg_power_on() unconditionally
> - drop the governor parameter of rzg2l_cpg_pd_setup() and decide the
>   governor based on always_on flag
> - collected tags

Thanks, will queue in renesas-clk for v6.13.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds