Similar to commit 890cc39a879906b63912482dfc41944579df2dc6
("drivers: provide devm_platform_get_and_ioremap_resource()")
add a wrapper for "platform_get_resource_byname" and
"devm_ioremap_resource". This new wrapper also returns the resource, if
any, via a pointer.
Suggested-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@xxxxxxxxxxx>
---
drivers/base/platform.c | 28 ++++++++++++++++++++++++++++
include/linux/platform_device.h | 13 +++++++++++++
2 files changed, 41 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4c3ee6521ba5..ab48c02fcb2c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -108,6 +108,34 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
}
EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);
+/**
+ * devm_platform_get_and_ioremap_resource_byname - call devm_ioremap_resource()
+ * for a platform device and get
+ * a resource by its name instead
+ * of the index
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @name: resource name
+ * @res: optional output parameter to store a pointer to the obtained resource.
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
+ */
+void __iomem *
+devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name,
+ struct resource **res)
+{
+ struct resource *r;
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+ if (res)
+ *res = r;
+ return devm_ioremap_resource(&pdev->dev, r);
+}
+EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource_byname);
+
/**
* 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 d422db6eec63..ab7f33f3c426 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -68,6 +68,12 @@ platform_find_device_by_driver(struct device *start,
extern void __iomem *
devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
unsigned int index, struct resource **res);
+
+extern void __iomem *
+devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name,
+ struct resource **res);
+
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
@@ -83,6 +89,13 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
return ERR_PTR(-EINVAL);
}
+static inline void __iomem *
+devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name,
+ struct resource **res)
+{
+ return ERR_PTR(-EINVAL);
+}
static inline void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
--
2.45.2
