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dm: uclass: Add uclass_foreach_dev_probe

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Add uclass_foreach_dev_probe() which iterates through
devices of a given uclass. Devices are probed if necessary
and are ready to use.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Patrice Chotard
2018-10-24 14:10:16 +02:00
committed by Tom Rini
parent f6abd5389c
commit 37b596ac5c
1 changed files with 16 additions and 0 deletions
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16
include/dm/uclass.h
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@@ -393,4 +393,20 @@ int uclass_resolve_seq(struct udevice *dev);
#define uclass_foreach_dev_safe(pos, next, uc) \ #define uclass_foreach_dev_safe(pos, next, uc) \
list_for_each_entry_safe(pos, next, &uc->dev_head, uclass_node) list_for_each_entry_safe(pos, next, &uc->dev_head, uclass_node)
/**
* uclass_foreach_dev_probe() - Helper function to iteration through devices
* of given uclass
*
* This creates a for() loop which works through the available devices in
* a uclass in order from start to end. Devices are probed if necessary,
* and ready for use.
*
* @id: Uclass ID
* @dev: struct udevice * to hold the current device. Set to NULL when there
* are no more devices.
*/
#define uclass_foreach_dev_probe(id, dev) \
for (int _ret = uclass_first_device_err(id, &dev); !_ret && dev; \
_ret = uclass_next_device_err(&dev))
#endif #endif