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authorTuowen Zhao <ztuowen@gmail.com>2019-10-16 15:06:28 -0600
committerLee Jones <lee.jones@linaro.org>2019-11-11 08:40:18 +0000
commite537654b7039aacfe8ae629d49655c0e5692ad44 (patch)
tree610f9c0aab36b4ce9d7f415fcc01b64367a2ed2c
parent38e45d81d14e5f78cd67922596b1c37b4c22ec74 (diff)
lib: devres: add a helper function for ioremap_uc
Implement a resource managed strongly uncachable ioremap function. Cc: <stable@vger.kernel.org> # v4.19+ Tested-by: AceLan Kao <acelan.kao@canonical.com> Signed-off-by: Tuowen Zhao <ztuowen@gmail.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
-rw-r--r--include/linux/io.h2
-rw-r--r--lib/devres.c19
2 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h
index accac822336a..a59834bc0a11 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -64,6 +64,8 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
resource_size_t size);
+void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
+ resource_size_t size);
void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
resource_size_t size);
void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
diff --git a/lib/devres.c b/lib/devres.c
index 6a0e9bd6524a..17624d35e82d 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -9,6 +9,7 @@
enum devm_ioremap_type {
DEVM_IOREMAP = 0,
DEVM_IOREMAP_NC,
+ DEVM_IOREMAP_UC,
DEVM_IOREMAP_WC,
};
@@ -39,6 +40,9 @@ static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
case DEVM_IOREMAP_NC:
addr = ioremap_nocache(offset, size);
break;
+ case DEVM_IOREMAP_UC:
+ addr = ioremap_uc(offset, size);
+ break;
case DEVM_IOREMAP_WC:
addr = ioremap_wc(offset, size);
break;
@@ -69,6 +73,21 @@ void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
EXPORT_SYMBOL(devm_ioremap);
/**
+ * devm_ioremap_uc - Managed ioremap_uc()
+ * @dev: Generic device to remap IO address for
+ * @offset: Resource address to map
+ * @size: Size of map
+ *
+ * Managed ioremap_uc(). Map is automatically unmapped on driver detach.
+ */
+void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
+ resource_size_t size)
+{
+ return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
+}
+EXPORT_SYMBOL_GPL(devm_ioremap_uc);
+
+/**
* devm_ioremap_nocache - Managed ioremap_nocache()
* @dev: Generic device to remap IO address for
* @offset: Resource address to map