compat: backport platform_device_register_data()

Add the helper.

mcgrof@frijol ~/linux-next (git::master)$ git describe --contains d8bf254
v2.6.28-rc1~284^2~9

commit d8bf254089a6c31d7d01a4d1d2f1861662900855
Author: Dmitry Baryshkov <dbaryshkov@gmail.com>
Date:   Mon Sep 22 14:41:40 2008 -0700

    platform: add new device registration helper

    Add a helper that registers simple platform_device w/o resources but with
    parent and device data.

    This is usefull to cleanup platform code from code that registers such
    simple devices as leds-gpio, generic-bl, etc.

    Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
    Cc: David Brownell <dbrownell@users.sourceforge.net>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

mcgrof@drvbp1 ~/compat (git::master)$ time ckmake
Trying kernel 3.6.5-030605-generic [OK]
Trying kernel 3.5.7-030507-generic [OK]
Trying kernel 3.4.17-030417-generic [OK]
Trying kernel 3.3.8-030308-generic [OK]
Trying kernel 3.2.33-030233-generic [OK]
Trying kernel 3.1.10-030110-generic [OK]
Trying kernel 3.0.50-030050-generic [OK]
Trying kernel 2.6.39-02063904-generic [OK]
Trying kernel 2.6.38-02063808-generic [OK]
Trying kernel 2.6.37-02063706-generic [OK]
Trying kernel 2.6.36-02063604-generic [OK]
Trying kernel 2.6.35-02063513-generic [OK]
Trying kernel 2.6.34-02063413-generic [OK]
Trying kernel 2.6.33-02063320-generic [OK]
Trying kernel 2.6.32-02063260-generic [OK]
Trying kernel 2.6.31-02063113-generic [OK]
Trying kernel 2.6.30-02063010-generic [OK]
Trying kernel 2.6.29-02062906-generic [OK]
Trying kernel 2.6.28-02062810-generic [OK]
Trying kernel 2.6.27-020627-generic [OK]
Trying kernel 2.6.26-020626-generic [OK]
Trying kernel 2.6.25-020625-generic [OK]
Trying kernel 2.6.24-020624-generic [OK]

real    1m58.798s
user    3m59.967s
sys     1m25.585s

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/compat/compat-2.6.28.c b/compat/compat-2.6.28.c
index 0ae8f465..6be54427 100644
--- a/compat/compat-2.6.28.c
+++ b/compat/compat-2.6.28.c
@@ -11,10 +11,58 @@
 #include <linux/compat.h>
 #include <linux/usb.h>
 #include <linux/tty.h>
+#include <linux/platform_device.h>
 #include <asm/poll.h>
 
 /* 2.6.28 compat code goes here */
 
+/**
+ * platform_device_register_data
+ * @parent: parent device for the device we're adding
+ * @name: base name of the device we're adding
+ * @id: instance id
+ * @data: platform specific data for this platform device
+ * @size: size of platform specific data
+ *
+ * This function creates a simple platform device that requires minimal
+ * resource and memory management. Canned release function freeing memory
+ * allocated for the device allows drivers using such devices to be
+ * unloaded without waiting for the last reference to the device to be
+ * dropped.
+ */
+struct platform_device *platform_device_register_data(
+		struct device *parent,
+		const char *name, int id,
+		const void *data, size_t size)
+{
+	struct platform_device *pdev;
+	int retval;
+
+	pdev = platform_device_alloc(name, id);
+	if (!pdev) {
+		retval = -ENOMEM;
+		goto error;
+	}
+
+	pdev->dev.parent = parent;
+
+	if (size) {
+		retval = platform_device_add_data(pdev, data, size);
+		if (retval)
+			goto error;
+	}
+
+	retval = platform_device_add(pdev);
+	if (retval)
+		goto error;
+
+	return pdev;
+
+error:
+	platform_device_put(pdev);
+	return ERR_PTR(retval);
+}
+
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23))
 #if defined(CONFIG_USB) || defined(CONFIG_USB_MODULE)
 /*