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SubjectRe: [PATCH 2/7] PM / Domains: Make it possible to use per-device .active_wakeup()
On Mon, 7 Nov 2011, Rafael J. Wysocki wrote:

> From: Rafael J. Wysocki <rjw@sisk.pl>
>
> The current generic PM domains code requires that the same
> .active_wakeup() device callback routine be used for all devices in
> the given domain, which is inflexible and may not cover some specific
> use cases. For this reason, make it possible to use device specific
> .active_wakeup() callback routines by adding a corresponding callback
> pointer to struct generic_pm_domain_data. To reduce code duplication
> use struct gpd_dev_ops to represent PM domain device callbacks as
> well as device-specific ones and add a macro for defining routines
> that will execute those callbacks.
>
> Modify the shmobile's power domains code to allow drivers to use
> their own .active_wakeup() callback routines.
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> ---
> arch/arm/mach-shmobile/pm-sh7372.c | 11 ++++---
> drivers/base/power/domain.c | 54 ++++++++++++++++++-------------------
> include/linux/pm_domain.h | 15 ++++------
> 3 files changed, 41 insertions(+), 39 deletions(-)
>
> Index: linux/include/linux/pm_domain.h
> ===================================================================
> --- linux.orig/include/linux/pm_domain.h
> +++ linux/include/linux/pm_domain.h
> @@ -23,6 +23,12 @@ struct dev_power_governor {
> bool (*power_down_ok)(struct dev_pm_domain *domain);
> };
>
> +struct gpd_dev_ops {
> + int (*start)(struct device *dev);
> + int (*stop)(struct device *dev);
> + bool (*active_wakeup)(struct device *dev);
> +};
> +
> struct generic_pm_domain {
> struct dev_pm_domain domain; /* PM domain operations */
> struct list_head gpd_list_node; /* Node in the global PM domains list */
> @@ -45,9 +51,7 @@ struct generic_pm_domain {
> bool dev_irq_safe; /* Device callbacks are IRQ-safe */
> int (*power_off)(struct generic_pm_domain *domain);
> int (*power_on)(struct generic_pm_domain *domain);
> - int (*start_device)(struct device *dev);
> - int (*stop_device)(struct device *dev);
> - bool (*active_wakeup)(struct device *dev);
> + struct gpd_dev_ops dev_ops;

Wouldn't it be better to merge patches 1 and 2?

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

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