diff options
| author | Simon Glass <sjg@chromium.org> | 2016-05-01 11:36:28 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-05-17 09:54:43 -0600 |
| commit | 52138fd4072b64448855eac4c2c9815b46f5b43c (patch) | |
| tree | fd5dead396df725150d71861e69d656d22e73dd9 /include/blk.h | |
| parent | 199a1201ab901413a80c64a9eee72f82977ba8d3 (diff) | |
dm: blk: Allow blk_create_device() to allocate the device number
Allow a devnum parameter of -1 to indicate that the device number should be
alocated automatically. The next highest available device number for that
interface type is used.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/blk.h')
| -rw-r--r-- | include/blk.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/blk.h b/include/blk.h index 2caac9c96b6..547c3b48dca 100644 --- a/include/blk.h +++ b/include/blk.h @@ -270,7 +270,8 @@ int blk_next_device(struct udevice **devp); * @drv_name: Driver name to use for the block device * @name: Name for the device * @if_type: Interface type (enum if_type_t) - * @devnum: Device number, specific to the interface type + * @devnum: Device number, specific to the interface type, or -1 to + * allocate the next available number * @blksz: Block size of the device in bytes (typically 512) * @size: Total size of the device in bytes * @devp: the new device (which has not been probed) @@ -299,6 +300,18 @@ int blk_prepare_device(struct udevice *dev); */ int blk_unbind_all(int if_type); +/** + * blk_find_max_devnum() - find the maximum device number for an interface type + * + * Finds the last allocated device number for an interface type @if_type. The + * next number is safe to use for a newly allocated device. + * + * @if_type: Interface type to scan + * @return maximum device number found, or -ENODEV if none, or other -ve on + * error + */ +int blk_find_max_devnum(enum if_type if_type); + #else #include <errno.h> /* |