Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 20:22:09 +00:00
Code Issues Packages Projects Releases Wiki Activity

driver core: platform: Introduce platform_get_mem_or_io()

Browse Source 
There are at least few existing users of the proposed API which
retrieves either MEM or IO resource from platform device.

Make it common to utilize in the existing and new users.

Cc: Eric Auger <eric.auger@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: Peng Hao <peng.hao2@zte.com.cn>
Cc: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201209203642.27648-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2020-12-09 22:36:38 +02:00 committed by Greg Kroah-Hartman
parent 3577afb005
commit 0aec2da436
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/base/platform.c
View File

@ -63,6 +63,21 @@ struct resource *platform_get_resource(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource);
struct resource *platform_get_mem_or_io(struct platform_device *dev,
unsigned int num)
{
u32 i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
if ((resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) && num-- == 0)
return r;
}
return NULL;
}
EXPORT_SYMBOL_GPL(platform_get_mem_or_io);
#ifdef CONFIG_HAS_IOMEM
/**
* devm_platform_get_and_ioremap_resource - call devm_ioremap_resource() for a

3
include/linux/platform_device.h
View File

@ -52,6 +52,9 @@ extern struct device platform_bus;
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
extern struct resource *platform_get_mem_or_io(struct platform_device *,
unsigned int);
extern struct device *
platform_find_device_by_driver(struct device *start,
const struct device_driver *drv);