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Date: Mon, 21 Jun 2010 16:11:44 +0200
From: Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>
To: Greg KH <greg@...ah.com>
Cc: Randy Dunlap <rdunlap@...otime.net>,
Dmitry Torokhov <dtor@...l.ru>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>, Anisse Astier <anisse@...ier.eu>,
Greg Kroah-Hartman <gregkh@...e.de>,
Magnus Damm <damm@...nsource.se>,
"Rafael J. Wysocki" <rjw@...k.pl>,
Paul Mundt <lethal@...ux-sh.org>,
Eric Miao <eric.y.miao@...il.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 2/2 v2] Driver core: reduce duplicated code
This makes the two similar functions platform_device_register_simple
and platform_device_register_data one line inline functions using a new
generic function platform_device_register_resndata.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
Hello,
still unsolved is the naming issue, what do you think about
platform_device_register?
I marked the new function as __init_or_module in a separate patch to
make reverting it a bit easier, still I think it should be possible to
fix the caller if a problem occurs.
I changed the semantic slightly to only call
platform_device_add_resources if data != NULL instead of size != 0. The
idea is to support wrappers like:
#define add_blablub(id, pdata) \
platform_device_register_resndata(NULL, "blablub", id, \
NULL, 0, pdata, sizeof(struct blablub_platform_data))
that don't fail if pdata=NULL. Ditto for res.
Best regards
Uwe
changed since v1:
- fix docbook to pick up platform_device_register_simple and
platform_device_register_data after moving them to
<linux/platform_device.h>
- only add_resources and add_data if res and data are non-NULL resp.
Documentation/DocBook/device-drivers.tmpl | 1 +
drivers/base/platform.c | 104 +++++++---------------------
include/linux/platform_device.h | 62 ++++++++++++++++-
3 files changed, 85 insertions(+), 82 deletions(-)
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
index 1b2dd4f..ecd35e9 100644
--- a/Documentation/DocBook/device-drivers.tmpl
+++ b/Documentation/DocBook/device-drivers.tmpl
@@ -111,6 +111,7 @@ X!Edrivers/base/attribute_container.c
<!--
X!Edrivers/base/interface.c
-->
+!Iinclude/linux/platform_device.h
!Edrivers/base/platform.c
!Edrivers/base/bus.c
</sect1>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 26eb69d..ffcfd73 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -344,108 +344,56 @@ void platform_device_unregister(struct platform_device *pdev)
EXPORT_SYMBOL_GPL(platform_device_unregister);
/**
- * platform_device_register_simple - add a platform-level device and its resources
- * @name: base name of the device we're adding
- * @id: instance id
- * @res: set of resources that needs to be allocated for the device
- * @num: number of resources
- *
- * 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.
+ * platform_device_register_resndata - add a platform-level device with
+ * resources and platform-specific data
*
- * This interface is primarily intended for use with legacy drivers which
- * probe hardware directly. Because such drivers create sysfs device nodes
- * themselves, rather than letting system infrastructure handle such device
- * enumeration tasks, they don't fully conform to the Linux driver model.
- * In particular, when such drivers are built as modules, they can't be
- * "hotplugged".
- *
- * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
- */
-struct platform_device *platform_device_register_simple(const char *name,
- int id,
- const struct resource *res,
- unsigned int num)
-{
- struct platform_device *pdev;
- int retval;
-
- pdev = platform_device_alloc(name, id);
- if (!pdev) {
- retval = -ENOMEM;
- goto error;
- }
-
- if (num) {
- retval = platform_device_add_resources(pdev, res, num);
- if (retval)
- goto error;
- }
-
- retval = platform_device_add(pdev);
- if (retval)
- goto error;
-
- return pdev;
-
-error:
- platform_device_put(pdev);
- return ERR_PTR(retval);
-}
-EXPORT_SYMBOL_GPL(platform_device_register_simple);
-
-/**
- * platform_device_register_data - add a platform-level device with platform-specific data
* @parent: parent device for the device we're adding
* @name: base name of the device we're adding
* @id: instance id
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
* @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.
- *
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
-struct platform_device *platform_device_register_data(
+struct platform_device *platform_device_register_resndata(
struct device *parent,
const char *name, int id,
+ const struct resource *res, unsigned int num,
const void *data, size_t size)
{
+ int ret = -ENOMEM;
struct platform_device *pdev;
- int retval;
pdev = platform_device_alloc(name, id);
- if (!pdev) {
- retval = -ENOMEM;
- goto error;
- }
+ if (!pdev)
+ goto err;
pdev->dev.parent = parent;
- if (size) {
- retval = platform_device_add_data(pdev, data, size);
- if (retval)
- goto error;
+ if (res) {
+ ret = platform_device_add_resources(pdev, res, num);
+ if (ret)
+ goto err;
}
- retval = platform_device_add(pdev);
- if (retval)
- goto error;
+ if (data) {
+ ret = platform_device_add_data(pdev, data, size);
+ if (ret)
+ goto err;
+ }
- return pdev;
+ ret = platform_device_add(pdev);
+ if (ret) {
+err:
+ platform_device_put(pdev);
+ return ERR_PTR(ret);
+ }
-error:
- platform_device_put(pdev);
- return ERR_PTR(retval);
+ return pdev;
}
-EXPORT_SYMBOL_GPL(platform_device_register_data);
+EXPORT_SYMBOL_GPL(platform_device_register_resndata);
static int platform_drv_probe(struct device *_dev)
{
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 5417944..d7ecad0 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -43,10 +43,64 @@ extern struct resource *platform_get_resource_byname(struct platform_device *, u
extern int platform_get_irq_byname(struct platform_device *, const char *);
extern int platform_add_devices(struct platform_device **, int);
-extern struct platform_device *platform_device_register_simple(const char *, int id,
- const struct resource *, unsigned int);
-extern struct platform_device *platform_device_register_data(struct device *,
- const char *, int, const void *, size_t);
+extern struct platform_device *platform_device_register_resndata(
+ struct device *parent, const char *name, int id,
+ const struct resource *res, unsigned int num,
+ const void *data, size_t size);
+
+/**
+ * platform_device_register_simple - add a platform-level device and its resources
+ * @name: base name of the device we're adding
+ * @id: instance id
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
+ *
+ * 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.
+ *
+ * This interface is primarily intended for use with legacy drivers which
+ * probe hardware directly. Because such drivers create sysfs device nodes
+ * themselves, rather than letting system infrastructure handle such device
+ * enumeration tasks, they don't fully conform to the Linux driver model.
+ * In particular, when such drivers are built as modules, they can't be
+ * "hotplugged".
+ *
+ * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
+ */
+static inline struct platform_device *platform_device_register_simple(
+ const char *name, int id,
+ const struct resource *res, unsigned int num)
+{
+ return platform_device_register_resndata(NULL, name, id,
+ res, num, NULL, 0);
+}
+
+/**
+ * platform_device_register_data - add a platform-level device with platform-specific 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.
+ *
+ * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
+ */
+static inline struct platform_device *platform_device_register_data(
+ struct device *parent, const char *name, int id,
+ const void *data, size_t size)
+{
+ return platform_device_register_resndata(parent, name, id,
+ NULL, 0, data, size);
+}
extern struct platform_device *platform_device_alloc(const char *name, int id);
extern int platform_device_add_resources(struct platform_device *pdev,
--
1.7.1
--
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