From: Kevin Hilman <khilman@xxxxxx>
In order to help differentiate omap_devices from normal
platform_devices, make them all a parent of a new common parent
device.
Then, in order to determine if a platform_device is also an
omap_device, checking the parent is all that is needed.
Users of this feature are the runtime PM core for OMAP, where we need
to know if a device being passed in is an omap_device or not in order
to know whether to call the omap_device API with it.
In addition, all omap_devices will now show up under /sys/devices/omap
instead of /sys/devices/platform
Signed-off-by: Kevin Hilman <khilman@xxxxxx>
---
Changes since v1:
- renamed the device from omap_bus to omap_parent_device to be more
clear that this is not a bus.
arch/arm/plat-omap/include/plat/omap_device.h | 2 ++
arch/arm/plat-omap/omap_device.c | 12 ++++++++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index bad4c3d..28e2d1a 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -36,6 +36,8 @@
#include <plat/omap_hwmod.h>
+extern struct device omap_device_parent;
+
/* omap_device._state values */
#define OMAP_DEVICE_STATE_UNKNOWN 0
#define OMAP_DEVICE_STATE_ENABLED 1
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 7f05f49..8215b1b 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -465,6 +465,7 @@ int omap_device_register(struct omap_device *od)
{
pr_debug("omap_device: %s: registering\n", od->pdev.name);
+ od->pdev.dev.parent = &omap_device_parent;
return platform_device_register(&od->pdev);
}
@@ -737,3 +738,14 @@ int omap_device_enable_clocks(struct omap_device *od)
/* XXX pass along return value here? */
return 0;
}
+
+struct device omap_device_parent = {
+ .init_name = "omap",
+ .parent = &platform_bus,
+};
+
+static int __init omap_device_init(void)
+{
+ return device_register(&omap_device_parent);
+}
+core_initcall(omap_device_init);
--
1.7.2.1
--
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