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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-12-09 22:36:38 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-12-10 16:31:46 +0100
commit0aec2da436623abe19b80b21dd9fc5ec9300a152 (patch)
tree1375608cdd70a7428b707d9a8240b4a4c6b52c25 /drivers/base/platform.c
parent3577afb0052fca65e67efdfc8e0859bb7bac87a6 (diff)
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/platform.c')
-rw-r--r--drivers/base/platform.c15
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