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| author | Wolfram Sang <w.sang@pengutronix.de> | 2011-10-25 15:16:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-15 16:07:39 -0800 |
| commit | 72f8c0bfa0de64c68ee59f40eb9b2683bffffbb0 (patch) | |
| tree | 44fa0c66dbb41d9154e170d4d97455e5665a5f12 /Documentation/driver-model | |
| parent | 571806a9f70fc4a4c575ab796555dfb401c2dfc1 (diff) | |
| download | lwn-72f8c0bfa0de64c68ee59f40eb9b2683bffffbb0.tar.gz lwn-72f8c0bfa0de64c68ee59f40eb9b2683bffffbb0.zip | |
lib: devres: add convenience function to remap a resource
Almost every platform_driver does the three steps get_resource,
request_mem_region, ioremap. This does not only lead to a lot of code
duplication, but also a huge number of similar error strings and
inconsistent error codes on failure. So, introduce a helper function
which simplifies remapping a resource and make it hard to do something
wrong and add documentation for it.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/driver-model')
| -rw-r--r-- | Documentation/driver-model/devres.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index d79aead9418b..10c64c8a13d4 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -262,6 +262,7 @@ IOMAP devm_ioremap() devm_ioremap_nocache() devm_iounmap() + devm_request_and_ioremap() : checks resource, requests region, ioremaps pcim_iomap() pcim_iounmap() pcim_iomap_table() : array of mapped addresses indexed by BAR |