driver core: move platform_data into platform_device

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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index ec993aa6a2ca..c5ac81d22303 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -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];