linux-kernel - Re: Legacy pm ops to dev_pm

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Date:	Wed, 05 Feb 2014 12:10 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	shuah.kh@...sung.com
Cc:	"shuahkhan@...il.com" <shuahkhan@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pm@...r.kernel.org
Subject: Re: Legacy pm ops to dev_pm_ops patches

On Tuesday, February 04, 2014 08:39:18 PM Shuah Khan wrote:
> Hi Rafael,

Hi,

> I checked on the status of the legacy pm ops to dev_pm_ops conversion 
> patches. Several went in. I have about 13 patches I would like to send. 
> These patches are similar in nature. One of the issues I am having is 
> being able to test these patches. Except for drivers/pcmcia/ds.c patch, 
> others I am limited to compile testing only. Would it be okay to I send 
> these as RFT patches cc'ing you and linux-pm and in addition to the 
> maintainers for each of these patches?
> 
> Patch details below:
> 
> 5 mmc host driver patches:
> 
> drivers/mmc/host/au1xmmc.c
> drivers/mmc/host/bfin_sdh.c
> drivers/mmc/host/cb710-mmc.c
> drivers/mmc/host/msm_sdcc.c
> drivers/mmc/host/tmio_mmc.c
> 
> 3 arm platform driver patches:
> 
> arch/arm/common/locomo.c
> arch/arm/common/sa1111.c
> arch/arm/common/scoop.c
> 
> 1 macintosh driver patch:
> drivers/macintosh/adb.c
> 
> 3 bus drivers patches:
> drivers/base/isa.c
> drivers/pcmcia/ds.c
> drivers/s390/crypto/ap_bus.c
> 
> The nature if changes is very similar:
> 1. Define dev_pm_ops as in the example below:
> 
> +static const struct dev_pm_ops pcmcia_bus_dev_pm_ops = {
> +       .suspend = pcmcia_dev_suspend,
> +       .resume = pcmcia_dev_resume,
> +       /* Hibernate callbacks */
> +       .freeze = pcmcia_dev_freeze,
> +       .thaw = pcmcia_dev_resume,
> +       .poweroff = pcmcia_dev_poweroff,
> +       .restore = pcmcia_dev_resume,
> +};
> 
>   struct bus_type pcmcia_bus_type = {
>          .name = "pcmcia",
> @@ -1405,8 +1432,7 @@ struct bus_type pcmcia_bus_type = {
>          .dev_groups = pcmcia_dev_groups,
>          .probe = pcmcia_device_probe,
>          .remove = pcmcia_device_remove,
> -       .suspend = pcmcia_dev_suspend,
> -       .resume = pcmcia_dev_resume,
> +       .pm = &pcmcia_bus_dev_pm_ops,
>   };
> 
> 2. Define new interfaces for poweroff, freeze which in turn call 
> existing suspend interface, as in the example below. thaw, resume, and 
> restore are straight forward and just point to existing resume() hook
> 
> +static int pcmcia_dev_suspend(struct device *dev)
> +{
> +       __pcmcia_dev_suspend(dev, PMSG_SUSPEND);
> +}
> +
> +static int pcmcia_dev_poweroff(struct device *dev)
> +{
> +       __pcmcia_dev_suspend(dev, PMSG_HIBERNATE);
> +}
> +
> +static int pcmcia_dev_freeze(struct device *dev)
> +{
> +       __pcmcia_dev_suspend(dev, PMSG_FREEZE);
> +}
> +
> +static int __pcmcia_dev_suspend(struct device *dev, pm_message_t state)
>   {
>          struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
>          struct pcmcia_driver *p_drv = NULL;
> @@ -1397,6 +1415,15 @@ static struct class_interface 
> pcmcia_bus_interface __refdata = {
>          .remove_dev = &pcmcia_bus_remove_socket,
>   };
> 

OK

Can you please send all of these patches in one series to me and linux-pm
and CC the LKML and the maintainers of the subsystems in question (only the
patches concerning them directly)?

Rafael

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