From: Dejin Zheng <zhengdejin5@gmail.com>
To: gregkh@linuxfoundation.org, rafael@kernel.org,
hminas@synopsys.com, mathias.nyman@intel.com,
bgolaszewski@baylibre.com, arnd@arndb.de,
jeffrey.t.kirsher@intel.com, hdegoede@redhat.com,
treding@nvidia.com, tglx@linutronix.de, tomas.winkler@intel.com,
suzuki.poulose@arm.com, sergei.shtylyov@cogentembedded.com,
geert@linux-m68k.org, linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Dejin Zheng <zhengdejin5@gmail.com>
Subject: [PATCH v3 1/5] drivers: provide devm_platform_get_and_ioremap_resource()
Date: Sun, 15 Mar 2020 22:05:21 +0800 [thread overview]
Message-ID: <20200315140525.21780-2-zhengdejin5@gmail.com> (raw)
In-Reply-To: <20200315140525.21780-1-zhengdejin5@gmail.com>
Since commit "drivers: provide devm_platform_ioremap_resource()",
it was wrap platform_get_resource() and devm_ioremap_resource() as
single helper devm_platform_ioremap_resource(). but now, many drivers
still used platform_get_resource() and devm_ioremap_resource()
together in the kernel tree. The reason can not be replaced is they
still need use the resource variables obtained by platform_get_resource().
so provide this helper.
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
---
v2 -> v3:
- rename the function to
devm_platform_get_and_ioremap_resource() by Sergei's suggestion.
- make the last parameter res as optional by Geert's suggestion.
v1 -> v2:
- No change.
drivers/base/platform.c | 22 ++++++++++++++++++++++
include/linux/platform_device.h | 3 +++
2 files changed, 25 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 7fa654f1288b..9f6a78f79235 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -62,6 +62,28 @@ struct resource *platform_get_resource(struct platform_device *dev,
EXPORT_SYMBOL_GPL(platform_get_resource);
#ifdef CONFIG_HAS_IOMEM
+/**
+ * devm_platform_get_and_ioremap_resource - call devm_ioremap_resource() for a
+ * platform device and get resource
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @index: resource index
+ * @res: get the resource
+ */
+void __iomem *
+devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
+ unsigned int index, struct resource **res)
+{
+ struct resource *r;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ if (res)
+ *res = r;
+ return devm_ioremap_resource(&pdev->dev, r);
+}
+EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);
+
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 8e83c6ff140d..8aa6b448450f 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -55,6 +55,9 @@ extern struct device *
platform_find_device_by_driver(struct device *start,
const struct device_driver *drv);
extern void __iomem *
+devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
+ unsigned int index, struct resource **res);
+extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
extern void __iomem *
--
2.25.0
next prev parent reply other threads:[~2020-03-15 14:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-15 14:05 [PATCH v3 0/5] drivers: new helper for ioremapping memory resources Dejin Zheng
2020-03-15 14:05 ` Dejin Zheng [this message]
2020-03-17 19:20 ` [PATCH v3 1/5] drivers: provide devm_platform_get_and_ioremap_resource() Greg KH
2020-03-17 19:35 ` Geert Uytterhoeven
2020-03-18 10:10 ` Greg KH
2020-03-20 14:06 ` Dejin Zheng
2020-03-23 12:44 ` Geert Uytterhoeven
2020-03-15 14:05 ` [PATCH v3 2/5] usb: host: xhci-plat: convert to devm_platform_get_and_ioremap_resource Dejin Zheng
2020-03-18 11:33 ` Mathias Nyman
2020-03-23 12:45 ` Geert Uytterhoeven
2020-03-15 14:05 ` [PATCH v3 3/5] usb: host: hisilicon: " Dejin Zheng
2020-03-18 11:35 ` Mathias Nyman
2020-03-23 12:45 ` Geert Uytterhoeven
2020-03-15 14:05 ` [PATCH v3 4/5] usb: dwc2: " Dejin Zheng
2020-03-18 10:40 ` Minas Harutyunyan
2020-03-23 12:47 ` Geert Uytterhoeven
2020-03-15 14:05 ` [PATCH v3 5/5] driver core: platform: Reimplement devm_platform_ioremap_resource Dejin Zheng
2020-03-23 12:47 ` Geert Uytterhoeven
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