On 22 November 2013 14:41, viresh kumar viresh.kumar@linaro.org wrote:
So, what about something like this ?
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index f48370d..523c0bc 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -120,6 +120,45 @@ static DEVICE_ATTR(release, S_IWUSR, NULL, cpu_release_store); #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ #endif /* CONFIG_HOTPLUG_CPU */
+int cpu_subsys_suspend_noirq(struct device *dev) +{
struct bus_type *bus = dev->bus;struct subsys_interface *sif;int ret = 0;list_for_each_entry(sif, &bus->p->interfaces, node) {if (sif->pm && sif->pm->suspend_noirq) {ret = sif->suspend_noirq(dev);if (ret)break;}}return ret;+}
+int cpu_subsys_resume_noirq(struct device *dev) +{
struct bus_type *bus = dev->bus;struct subsys_interface *sif;int ret = 0;list_for_each_entry(sif, &bus->p->interfaces, node) {if (sif->pm && sif->pm->resume_noirq) {ret = sif->resume_noirq(dev);if (ret)break;}}return ret;+}
+static const struct dev_pm_ops cpu_subsys_pm_ops = {
.suspend_noirq = cpu_subsys_suspend_noirq,.resume_noirq = cpu_subsys_resume_noirq,+};
struct bus_type cpu_subsys = { .name = "cpu", .dev_name = "cpu", @@ -128,6 +167,7 @@ struct bus_type cpu_subsys = { .online = cpu_subsys_online, .offline = cpu_subsys_offline, #endif
.pm = &cpu_subsys_pm_ops,}; EXPORT_SYMBOL_GPL(cpu_subsys);
diff --git a/include/linux/device.h b/include/linux/device.h index b025925..fa01273 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -298,11 +298,16 @@ struct device *driver_find_device(struct device_driver *drv,
- @node: the list of functions registered at the subsystem
- @add_dev: device hookup to device function handler
- @remove_dev: device hookup to device function handler
- @pm: Power management operations of this interface.
- Simple interfaces attached to a subsystem. Multiple interfaces can
- attach to a subsystem and its devices. Unlike drivers, they do not
- exclusively claim or control devices. Interfaces usually represent
- a specific functionality of a subsystem/class of devices.
- PM callbacks are called from individual subsystems instead of PM core. And
- hence might not be available for all subsystems. Currently present for:
*/
- cpu_subsys.
struct subsys_interface { const char *name; @@ -310,6 +315,7 @@ struct subsys_interface { struct list_head node; int (*add_dev)(struct device *dev, struct subsys_interface *sif); int (*remove_dev)(struct device *dev, struct subsys_interface *sif);
const struct dev_pm_ops *pm;};
int subsys_interface_register(struct subsys_interface *sif);
Any inputs?