[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v1 03/47] devres: add devm_ioremap_wc()
From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx> We have devm_ioremap_nocache() but no devm_ioremap_wc() so add that. This will be used later. Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Juergen Gross <jgross@xxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Dave Airlie <airlied@xxxxxxxxxx> Cc: Antonino Daplas <adaplas@xxxxxxxxx> Cc: Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx> Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Cc: linux-fbdev@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxx> --- Documentation/driver-model/devres.txt | 1 + include/linux/io.h | 2 ++ lib/devres.c | 29 +++++++++++++++++++++++++++++ 3 files changed, 32 insertions(+) diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index e1e2bbd..831a536 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -276,6 +276,7 @@ IOMAP devm_ioport_unmap() devm_ioremap() devm_ioremap_nocache() + devm_ioremap_wc() devm_ioremap_resource() : checks resource, requests memory region, ioremaps devm_iounmap() pcim_iomap() diff --git a/include/linux/io.h b/include/linux/io.h index 4cc299c..91101a1 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -72,6 +72,8 @@ void __iomem *devm_ioremap(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, + resource_size_t size); void devm_iounmap(struct device *dev, void __iomem *addr); int check_signature(const volatile void __iomem *io_addr, const unsigned char *signature, int length); diff --git a/lib/devres.c b/lib/devres.c index 0f1dd2e..2eb2bfe 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -72,6 +72,35 @@ void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, EXPORT_SYMBOL(devm_ioremap_nocache); /** + * devm_ioremap_wc - Managed ioremap_wc() + * @dev: Generic device to remap IO address for + * @offset: BUS offset to map + * @size: Size of map + * + * Managed ioremap_wc(). Map is automatically unmapped on driver + * detach. + */ +void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + void __iomem **ptr, *addr; + + ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return NULL; + + addr = ioremap_wc(offset, size); + if (addr) { + *ptr = addr; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return addr; +} +EXPORT_SYMBOL_GPL(devm_ioremap_wc); + +/** * devm_iounmap - Managed iounmap() * @dev: Generic device to unmap for * @addr: Address to unmap -- 2.3.2.209.gd67f9d5.dirty _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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