Commit 76e65f7a authored by Peng Fan's avatar Peng Fan Committed by Sudeep Holla
Browse files

firmware: arm_scmi: Add power management operations to SCMI bus 



Introduce suspend and resume power management callbacks for `scmi_bus_type`,
modeled after `platform_pm_ops`. This enables SCMI devices on the bus to
implement their own suspend and resume behavior, allowing for more
fine-grained power control at the device level.

Signed-off-by: default avatarPeng Fan <peng.fan@nxp.com>
Message-Id: <20250704-scmi-pm-v2-1-9316cec2f9cc@nxp.com>
Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent f8e65638

drivers/firmware/arm_scmi/bus.c

+26 −0
Original line number Diff line number Diff line
@@ -323,6 +323,31 @@ static struct attribute *scmi_device_attributes_attrs[] = { 
};

ATTRIBUTE_GROUPS(scmi_device_attributes);



static int scmi_pm_suspend(struct device *dev)

{

	const struct device_driver *drv = dev->driver;



	if (drv && drv->pm && drv->pm->suspend)

		return drv->pm->suspend(dev);



	return 0;

}



static int scmi_pm_resume(struct device *dev)

{

	const struct device_driver *drv = dev->driver;



	if (drv && drv->pm && drv->pm->resume)

		return drv->pm->resume(dev);



	return 0;

}



static const struct dev_pm_ops scmi_dev_pm_ops = {

	.suspend = pm_sleep_ptr(scmi_pm_suspend),

	.resume = pm_sleep_ptr(scmi_pm_resume),

};



const struct bus_type scmi_bus_type = {

	.name =	"scmi_protocol",

	.match = scmi_dev_match,
@@ -330,6 +355,7 @@ const struct bus_type scmi_bus_type = { 
	.remove = scmi_dev_remove,

	.uevent	= scmi_device_uevent,

	.dev_groups = scmi_device_attributes_groups,

	.pm = &scmi_dev_pm_ops,

};

EXPORT_SYMBOL_GPL(scmi_bus_type);