linux-kernel - Re: [PATCH 1/2] PM / Domains: Add GENPD_FLAG_SUSPEND

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Date:   Tue, 11 Aug 2020 14:38:45 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Sibi Sankar <sibis@...eaurora.org>, bjorn.andersson@...aro.org,
        rjw@...ysocki.net, ulf.hansson@...aro.org
Cc:     agross@...nel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        gregkh@...uxfoundation.org, pavel@....cz, len.brown@...el.com,
        rnayak@...eaurora.org, dianders@...omium.org, khilman@...nel.org,
        Sibi Sankar <sibis@...eaurora.org>
Subject: Re: [PATCH 1/2] PM / Domains: Add GENPD_FLAG_SUSPEND_ON flag

Quoting Sibi Sankar (2020-08-11 12:02:51)
> diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
> index ee11502a575b0..3002a2d68936a 100644
> --- a/include/linux/pm_domain.h
> +++ b/include/linux/pm_domain.h
> @@ -55,6 +55,10 @@
>   *
>   * GENPD_FLAG_RPM_ALWAYS_ON:   Instructs genpd to always keep the PM domain
>   *                             powered on except for system suspend.
> + *
> + * GENPD_FLAG_SUSPEND_ON:      Instructs genpd to keep the PM domain powered
> + *                             on during suspend and runtime PM controlled

Maybe, "powered on across system suspend (if it is already powered on)"
to match the hunk above that talks about system suspend for
GENPD_FLAG_RPM_ALWAYS_ON. Otherwise someone may think that this powers
on the genpd during suspend or powers it on during runtime suspend.

> + *                             otherwise.
>   */
>  #define GENPD_FLAG_PM_CLK       (1U << 0)
>  #define GENPD_FLAG_IRQ_SAFE     (1U << 1)