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bootstd: Allow scanning a single bootdev label

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We want to support scanning a single label, like 'mmc' or 'usb0'. Add
this feature by plumbing the label through to the iterator, setting a
flag to indicate that only siblings of the initial device should be used.

This means that scanning a bootdev by its name is not supported anymore.
That feature doesn't seem very useful in practice, so it is no great loss.

Add a test for bootdev_find_by_any() while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2023-01-17 10:48:15 -07:00
committed by Tom Rini
parent 47aedc29dc
commit 91943ff703
7 changed files with 166 additions and 76 deletions
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10
include/bootflow.h
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@@ -255,14 +255,18 @@ int bootflow_iter_drop_bootmeth(struct bootflow_iter *iter,
*
* @dev: Boot device to scan, NULL to work through all of them until it
* finds one that can supply a bootflow
* @label: Label to control the scan, NULL to work through all devices
* until it finds one that can supply a bootflow
* @iter: Place to store private info (inited by this call)
* @flags: Flags for iterator (enum bootflow_flags_t)
* @flags: Flags for iterator (enum bootflow_flags_t). Note that if @dev
* is NULL, then BOOTFLOWF_SKIP_GLOBAL is set automatically by this function
* @bflow: Place to put the bootflow if found
* Return: 0 if found, -ENODEV if no device, other -ve on other error
* (iteration can continue)
*/
int bootflow_scan_bootdev(struct udevice *dev, struct bootflow_iter *iter,
int flags, struct bootflow *bflow);
int bootflow_scan_bootdev(struct udevice *dev, const char *label,
struct bootflow_iter *iter, int flags,
struct bootflow *bflow);
/**
* bootflow_scan_first() - find the first bootflow