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| author | Simon Glass <sjg@chromium.org> | 2017-04-23 20:02:05 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-06-01 07:03:04 -0600 |
| commit | 6139281a6473334351c8776643478c0b0e208342 (patch) | |
| tree | 501de9018b4716ecc19bfcff404b4ea10f65e0ee /include/blk.h | |
| parent | e7017a3c7d2f9ff845516675205c99df4ad6eacc (diff) | |
| download | u-boot-6139281a6473334351c8776643478c0b0e208342.tar.gz | |
dm: blk: Allow finding block devices without probing
Sometimes it is useful to be able to find a block device without also
probing it. Add a function for this as well as the associated test.
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 66a1c55cc8..a128ee4841 100644 --- a/include/blk.h +++ b/include/blk.h @@ -253,12 +253,25 @@ unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt); /** + * blk_find_device() - Find a block device + * + * This function does not activate the device. The device will be returned + * whether or not it is activated. + * + * @if_type: Interface type (enum if_type_t) + * @devnum: Device number (specific to each interface type) + * @devp: the device, if found + * @return 0 if found, -ENODEV if no device found, or other -ve error value + */ +int blk_find_device(int if_type, int devnum, struct udevice **devp); + +/** * blk_get_device() - Find and probe a block device ready for use * * @if_type: Interface type (enum if_type_t) * @devnum: Device number (specific to each interface type) * @devp: the device, if found - * @return - if found, -ENODEV if no device found, or other -ve error value + * @return 0 if found, -ENODEV if no device found, or other -ve error value */ int blk_get_device(int if_type, int devnum, struct udevice **devp); |