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authorKumar Gala <galak@kernel.crashing.org>2011-06-10 01:52:57 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-07-08 00:21:35 -0500
commita77ce8167cc1d0370fcb1d79b367d62e050cb2b0 (patch)
treedcc1ad81d57546e066edbaddb9f6ebbd70e1c6a5
parent3160b09796129abc9523ea3cd1633b0faba64a02 (diff)
driver core: Add ability for arch code to setup pdev_archdata
On some architectures we need to setup pdev_archdata before we add the device. Waiting til a bus_notifier is too late since we might need the pdev_archdata in the bus notifier. One example is setting up of dma_mask pointers such that it can be used in a bus_notifier. We add weak noop version of arch_setup_pdev_archdata() and allow the arch code to override with access the full definitions of struct device, struct platform_device, and struct pdev_archdata. Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--drivers/base/platform.c21
-rw-r--r--include/linux/platform_device.h1
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 6040717b62bb..0cad9c7f6bb5 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -32,6 +32,25 @@ struct device platform_bus = {
EXPORT_SYMBOL_GPL(platform_bus);
/**
+ * arch_setup_pdev_archdata - Allow manipulation of archdata before its used
+ * @dev: platform device
+ *
+ * This is called before platform_device_add() such that any pdev_archdata may
+ * be setup before the platform_notifier is called. So if a user needs to
+ * manipulate any relevant information in the pdev_archdata they can do:
+ *
+ * platform_devic_alloc()
+ * ... manipulate ...
+ * platform_device_add()
+ *
+ * And if they don't care they can just call platform_device_register() and
+ * everything will just work out.
+ */
+void __weak arch_setup_pdev_archdata(struct platform_device *pdev)
+{
+}
+
+/**
* platform_get_resource - get a resource for a device
* @dev: platform device
* @type: resource type
@@ -173,6 +192,7 @@ struct platform_device *platform_device_alloc(const char *name, int id)
pa->pdev.id = id;
device_initialize(&pa->pdev.dev);
pa->pdev.dev.release = platform_device_release;
+ arch_setup_pdev_archdata(&pa->pdev);
}
return pa ? &pa->pdev : NULL;
@@ -334,6 +354,7 @@ EXPORT_SYMBOL_GPL(platform_device_del);
int platform_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
+ arch_setup_pdev_archdata(pdev);
return platform_device_add(pdev);
}
EXPORT_SYMBOL_GPL(platform_device_register);
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index ede1a80e3358..27bb05aae70d 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -42,6 +42,7 @@ extern void platform_device_unregister(struct platform_device *);
extern struct bus_type platform_bus_type;
extern struct device platform_bus;
+extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);