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Subject[PATCH 1/2] lib: devres: provide devm_ioremap_resource_nocache()
Date
Provide a variant of devm_ioremap_resource() for nocache ioremap.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
---
Documentation/driver-api/driver-model/devres.rst | 1 +
include/linux/device.h | 2 ++
lib/devres.c | 15 +++++++++++++++
3 files changed, 18 insertions(+)

diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 13046fcf0a5d..af1b1b9e3a17 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -317,6 +317,7 @@ IOMAP
devm_ioremap_uc()
devm_ioremap_wc()
devm_ioremap_resource() : checks resource, requests memory region, ioremaps
+ devm_ioremap_resource_nocache()
devm_ioremap_resource_wc()
devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device
devm_platform_ioremap_resource_wc()
diff --git a/include/linux/device.h b/include/linux/device.h
index 96ff76731e93..3aa353aa52e2 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -962,6 +962,8 @@ extern void devm_free_pages(struct device *dev, unsigned long addr);

void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res);
+void __iomem *devm_ioremap_resource_nocache(struct device *dev,
+ const struct resource *res);
void __iomem *devm_ioremap_resource_wc(struct device *dev,
const struct resource *res);

diff --git a/lib/devres.c b/lib/devres.c
index f56070cf970b..a182f8479fbf 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -188,6 +188,21 @@ void __iomem *devm_ioremap_resource(struct device *dev,
}
EXPORT_SYMBOL(devm_ioremap_resource);

+/**
+ * devm_ioremap_resource_nocache() - nocache variant of
+ * devm_ioremap_resource()
+ * @dev: generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
+ */
+void __iomem *devm_ioremap_resource_nocache(struct device *dev,
+ const struct resource *res)
+{
+ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_NC);
+}
+
/**
* devm_ioremap_resource_wc() - write-combined variant of
* devm_ioremap_resource()
--
2.17.1
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