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driver core: move platform_data into platform_device

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This patch moves platform_data from struct device into
struct platform_device, based on the two ideas:

1. Now all platform_driver is registered by platform_driver_register,
   which makes probe()/release()/... of platform_driver passed parameter
   of platform_device *, so platform driver can get platform_data from
   platform_device;

2. Other kind of devices do not need to use platform_data, we can
   decrease size of device if moving it to platform_device.

Taking into consideration of thousands of files to be fixed and they
can't be finished in one night(maybe it will take a long time), so we
keep platform_data in device to allow two kind of cases coexist until
all platform devices pass its platfrom data from
platform_device->platform_data.

All patches to do this kind of conversion are welcome.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ming Lei 2009-03-08 23:13:32 +08:00 committed by Greg Kroah-Hartman
parent e0edd3c65a
commit 006f4571a1
3 changed files with 11 additions and 2 deletions
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3
drivers/base/platform.c
View file

@ -217,6 +217,7 @@ int platform_device_add_data(struct platform_device *pdev, const void *data,
if (d) {
memcpy(d, data, size);
pdev->dev.platform_data = d;
pdev->platform_data = d;
}
return d ? 0 : -ENOMEM;
}
@ -246,6 +247,8 @@ int platform_device_add(struct platform_device *pdev)
else
dev_set_name(&pdev->dev, pdev->name);
pdev->platform_data = pdev->dev.platform_data;
for (i = 0; i < pdev->num_resources; i++) {
struct resource *p, *r = &pdev->resource[i];

9
include/linux/device.h
View file

@ -385,8 +385,13 @@ struct device {
struct device_driver *driver; /* which driver has allocated this
device */
void *driver_data; /* data private to the driver */
void *platform_data; /* Platform specific data, device
core doesn't touch it */
void *platform_data; /* We will remove platform_data
field if all platform devices
pass its platform specific data
from platform_device->platform_data,
other kind of devices should not
use platform_data. */
struct dev_pm_info power;
#ifdef CONFIG_NUMA

1
include/linux/platform_device.h
View file

@ -20,6 +20,7 @@ struct platform_device {
struct device dev;
u32 num_resources;
struct resource * resource;
void *platform_data;
struct platform_device_id *id_entry;
};