On Wed, 2018-07-11 at 08:02 -0600, Simon Glass wrote:
Hi Tien,
On 6 July 2018 at 02:26, tien.fong.chee@intel.com wrote:
From: Tien Fong Chee tien.fong.chee@intel.com
Add a function to find the block device descriptor of the parent device.
Signed-off-by: Tien Fong Chee tien.fong.chee@intel.com
drivers/block/blk-uclass.c | 23 +++++++++++++++++++++++ include/blk.h | 9 +++++++++ 2 files changed, 32 insertions(+)
diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk- uclass.c index 9e0c823..facf527 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; +}
Is this different from blk_get_from_parent() ?
This new function would return block description. blk_get_from_parents() would return child device.
[..]
Regards, Simon