mfd: Provide pm_runtime_no_callbacks flag in cell data (4c90aa94) · Commits · 戴 / test

Allow MFD cells to have pm_runtime_no_callbacks() called on them during registration. This causes the runtime PM framework to ignore them, allowing use of runtime PM to suspend the device as a whole even if not all drivers for the MFD can usefully implement runtime PM. For example, RTCs are likely to run continuously regardless of the power state of the system. Signed-off-by:

Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:

Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/mfd-core.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@
		#include <linux/platform_device.h>
		#include <linux/acpi.h>
		#include <linux/mfd/core.h>
		#include <linux/pm_runtime.h>
		#include <linux/slab.h>

		static int mfd_add_device(struct device *parent, int id,
		@@ -82,6 +83,9 @@ static int mfd_add_device(struct device *parent, int id,
		if (ret)
		goto fail_res;

		if (cell->pm_runtime_no_callbacks)
		pm_runtime_no_callbacks(&pdev->dev);

		kfree(res);

		return 0;

include/linux/mfd/core.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -47,6 +47,12 @@ struct mfd_cell {

		/* don't check for resource conflicts */
		bool ignore_resource_conflicts;

		/*
		* Disable runtime PM callbacks for this subdevice - see
		* pm_runtime_no_callbacks().
		*/
		bool pm_runtime_no_callbacks;
		};

		extern int mfd_add_devices(struct device *parent, int id,

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