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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-11-26 20:19:34 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2011-01-14 14:37:42 +0300
commit4c90aa94f6b3e33f57faaf19ef9819195dff61d3 (patch)
tree14eea47a6ca27e03d16514fe397a1cd9fbf4a901
parentd7b9f3220fd97522559316cdd72778f42ac4de04 (diff)
downloadlinux-4c90aa94f6b3e33f57faaf19ef9819195dff61d3.tar.xz
mfd: Provide pm_runtime_no_callbacks flag in cell data
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>
-rw-r--r--drivers/mfd/mfd-core.c4
-rw-r--r--include/linux/mfd/core.h6
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index ec99f681e773..d83ad0f141af 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -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;
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index 5582ab3d3e48..835996e167e1 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -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,