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| author | Thierry Reding <treding@nvidia.com> | 2015-09-25 17:29:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-05 05:02:40 +0100 |
| commit | dbe2256ddd8e8420c254c79f4045c41cb5f4bd6b (patch) | |
| tree | e90776bacb2349a6828b4e079aa131ff5293a61d /Documentation/driver-model | |
| parent | 7568fb63f57ac8672f8bf2018171255441238882 (diff) | |
| download | linux-dbe2256ddd8e8420c254c79f4045c41cb5f4bd6b.tar.bz2 | |
driver-core: platform: Provide helpers for multi-driver modules
Some modules register several sub-drivers. Provide a helper that makes
it easy to register and unregister a list of sub-drivers, as well as
unwind properly on error.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/driver-model')
| -rw-r--r-- | Documentation/driver-model/platform.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/driver-model/platform.txt b/Documentation/driver-model/platform.txt index 07795ec51cde..e456696cfef2 100644 --- a/Documentation/driver-model/platform.txt +++ b/Documentation/driver-model/platform.txt @@ -63,6 +63,20 @@ runtime memory footprint: int platform_driver_probe(struct platform_driver *drv, int (*probe)(struct platform_device *)) +Kernel modules can be composed of several platform drivers. The platform core +provides helpers to register and unregister an array of drivers: + + int __platform_register_drivers(struct platform_driver * const *drivers, + unsigned int count, struct module *owner); + void platform_unregister_drivers(struct platform_driver * const *drivers, + unsigned int count); + +If one of the drivers fails to register, all drivers registered up to that +point will be unregistered in reverse order. Note that there is a convenience +macro that passes THIS_MODULE as owner parameter: + + #define platform_register_driver(drivers, count) + Device Enumeration ~~~~~~~~~~~~~~~~~~ |