From: Kevin Hilman <khil...@ti.com>
In order to help differentiate omap_devices from normal
platform_devices, make them all a parent of a new omap_bus 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 <khil...@ti.com>
---
since v1:
- misc. cleanup as suggested by Thara. But, chose to leave out
the handling of a failed device_register(), since the failure
of a parent-less device_register() is extrememly unlikely and
is not handled for the platform_bus either.
arch/arm/plat-omap/include/plat/omap_device.h | 2 ++
arch/arm/plat-omap/omap_device.c | 11 +++++++++++
2 files changed, 13 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..26d0c10 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_bus;
+
/* 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..8b8f006 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_bus;
return platform_device_register(&od->pdev);
}
@@ -737,3 +738,13 @@ int omap_device_enable_clocks(struct omap_device *od)
/* XXX pass along return value here? */
return 0;
}
+
+struct device omap_bus = {
+ .init_name = "omap",
+};
+
+static int __init omap_device_init(void)
+{
+ return device_register(&omap_bus);
+}
+core_initcall(omap_device_init);
--
1.7.2.1
--
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