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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-12-09 21:36:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-10 16:31:46 +0100 |
| commit | 0aec2da436623abe19b80b21dd9fc5ec9300a152 (patch) | |
| tree | 1375608cdd70a7428b707d9a8240b4a4c6b52c25 /drivers/base | |
| parent | dyndbg: fix use before null check (diff) | |
| download | linux-0aec2da436623abe19b80b21dd9fc5ec9300a152.tar.xz linux-0aec2da436623abe19b80b21dd9fc5ec9300a152.zip | |
driver core: platform: Introduce platform_get_mem_or_io()
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>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/platform.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 8ad06daa2eaa..0358dc3ea3ad 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -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 |