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| author | Tien Fong Chee <tien.fong.chee@intel.com> | 2018-07-06 16:26:36 +0800 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-09-28 20:22:33 -0400 |
| commit | bc53d2637e5477ca3cd63ab942ef6038615a8e01 (patch) | |
| tree | 5aea0b1ec694e13cb95477adaa59d83cb463f468 /drivers/block | |
| parent | 14dfc6482a9057472ea202d2df4133a45bc3c1bc (diff) | |
| download | u-boot-bc53d2637e5477ca3cd63ab942ef6038615a8e01.tar.gz u-boot-bc53d2637e5477ca3cd63ab942ef6038615a8e01.tar.xz u-boot-bc53d2637e5477ca3cd63ab942ef6038615a8e01.zip | |
block: Add a function to find block device descriptor
Add a function to find the block device descriptor of the parent
device.
Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
[trini: Move function declaration to avoid warning]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/blk-uclass.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c index 9e0c823969..facf52711c 100644 --- a/drivers/block/blk-uclass.c +++ b/drivers/block/blk-uclass.c @@ -132,6 +132,29 @@ struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum) } /** + * blk_get_by_device() - Get the block device descriptor for the given device + * @dev: Instance of a storage device + * + * Return: With block device descriptor on success , NULL if there is no such + * block device. + */ +struct blk_desc *blk_get_by_device(struct udevice *dev) +{ + struct udevice *child_dev, *next; + + device_foreach_child_safe(child_dev, next, dev) { + if (device_get_uclass_id(child_dev) != UCLASS_BLK) + continue; + + return dev_get_uclass_platdata(child_dev); + } + + debug("%s: No block device found\n", __func__); + + return NULL; +} + +/** * get_desc() - Get the block device descriptor for the given device number * * @if_type: Interface type |