linux-kernel - [PATCH v1 1/5] driver core: platform: Introduce platform_get_mem_or_io

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Date:   Tue, 27 Oct 2020 19:58:02 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Eric Auger <eric.auger@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>, kvm@...r.kernel.org,
        linux-usb@...r.kernel.org, Peng Hao <peng.hao2@....com.cn>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v1 1/5] driver core: platform: Introduce platform_get_mem_or_io_resource()

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.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Eric Auger <eric.auger@...hat.com>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: Cornelia Huck <cohuck@...hat.com>
Cc: kvm@...r.kernel.org
Cc: linux-usb@...r.kernel.org
Cc: Peng Hao <peng.hao2@....com.cn>
Cc: Arnd Bergmann <arnd@...db.de>
---
 include/linux/platform_device.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 77a2aada106d..eb8d74744e29 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -52,6 +52,19 @@ extern struct device platform_bus;
 
 extern struct resource *platform_get_resource(struct platform_device *,
 					      unsigned int, unsigned int);
+static inline
+struct resource *platform_get_mem_or_io_resource(struct platform_device *pdev,
+						 unsigned int num)
+{
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, num);
+	if (res)
+		return res;
+
+	return platform_get_resource(pdev, IORESOURCE_IO, num);
+}
+
 extern struct device *
 platform_find_device_by_driver(struct device *start,
 			       const struct device_driver *drv);
-- 
2.28.0