driver core: platform: Introduce platform_get_mem_or_io() (0aec2da4) · Commits · 戴 / test

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>

drivers/base/platform.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -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

include/linux/platform_device.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);

Admin message