From 6139281a6473334351c8776643478c0b0e208342 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 23 Apr 2017 20:02:05 -0600 Subject: 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 --- include/blk.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'include/blk.h') diff --git a/include/blk.h b/include/blk.h index 66a1c55cc8..a128ee4841 100644 --- a/include/blk.h +++ b/include/blk.h @@ -252,13 +252,26 @@ unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start, 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); -- cgit v1.2.3