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OMAP: omap_device: make all devices a child of a new parent device

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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

Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Kevin Hilman
2010-08-23 08:10:55 -07:00
parent a1ed40cb25
commit 0d5e825252
2 changed files with 14 additions and 0 deletions
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2
arch/arm/plat-omap/include/plat/omap_device.h
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@@ -36,6 +36,8 @@
#include <plat/omap_hwmod.h> #include <plat/omap_hwmod.h>
extern struct device omap_device_parent;
/* omap_device._state values */ /* omap_device._state values */
#define OMAP_DEVICE_STATE_UNKNOWN 0 #define OMAP_DEVICE_STATE_UNKNOWN 0
#define OMAP_DEVICE_STATE_ENABLED 1 #define OMAP_DEVICE_STATE_ENABLED 1

12
arch/arm/plat-omap/omap_device.c
View File

@@ -465,6 +465,7 @@ int omap_device_register(struct omap_device *od)
{ {
pr_debug("omap_device: %s: registering\n", od->pdev.name); pr_debug("omap_device: %s: registering\n", od->pdev.name);
od->pdev.dev.parent = &omap_device_parent;
return platform_device_register(&od->pdev); 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? */ /* XXX pass along return value here? */
return 0; 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);