From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ulf Hansson <ulf.hansson@linaro.org>
Subject: Re: [PATCH/RFC 3/4] of/clk: Register clocks suitable for Runtime PM
 with the PM core
Date: Fri, 2 May 2014 10:56:23 +0200
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To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Magnus Damm <magnus.damm@gmail.com>, Simon Horman <horms@verge.net.au>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Ben Dooks <ben.dooks@codethink.co.uk>, Felipe Balbi <balbi@ti.com>, Mike Turquette <mturquette@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-sh@vger.kernel.org, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, linux-omap <linux-omap@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>
List-Id: devicetree@vger.kernel.org

 Hi Geert,

Some more review comments.

> +
> +
> +#ifdef CONFIG_PM_RUNTIME
> +
> +static int of_clk_pm_runtime_suspend(struct device *dev)
> +{
> +       int ret;
> +
> +       ret = pm_generic_runtime_suspend(dev);
> +       if (ret)
> +               return ret;
> +
> +       ret = pm_clk_suspend(dev);

What about slow clocks? Those aren't handled with pm_clk_suspend().

> +       if (ret) {
> +               pm_generic_runtime_resume(dev);
> +               return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +static int of_clk_pm_runtime_resume(struct device *dev)
> +{
> +       pm_clk_resume(dev);

What about slow clocks? Those aren't handled with pm_clk_resume().

> +       return pm_generic_runtime_resume(dev);
> +}
> +
> +static struct dev_pm_domain of_clk_pm_domain = {
> +       .ops = {
> +               .runtime_suspend = of_clk_pm_runtime_suspend,
> +               .runtime_resume = of_clk_pm_runtime_resume,

Drivers/subsystems may invoke pm_runtime_force_suspend|resume() from
some of their system PM callbacks, which requires the runtime PM
callbacks to be defined for CONFIG_PM instead of CONFIG_PM_RUNTIME, I
believe that should be changed here as well.

> +               USE_PLATFORM_PM_SLEEP_OPS

What about other buses beside the platfrom bus. Certainly we need to
handle devices attached to any other subsystem type as well.

Kind regards
Ulf Hansson