From 3cf0fba4ff862d833545f82fb2209ff3c79d17b5 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 6 Feb 2020 09:54:49 -0700 Subject: dm: core: Allow iterating devices without uclass_get() At present we have uclass_foreach_dev() which requires that uclass_get() be called beforehand to find the uclass. This is good if we suspect that that function might fail, but often we know that the uclass is available. Add a new helper which does this uclass_get() automatically, so that only the uclass ID is needed. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- include/dm/uclass.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/dm/uclass.h') diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 484d166..74b8e2e 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -366,6 +366,23 @@ int uclass_next_device_check(struct udevice **devp); int uclass_resolve_seq(struct udevice *dev); /** + * uclass_id_foreach_dev() - Helper function to iteration through devices + * + * This creates a for() loop which works through the available devices in + * a uclass ID in order from start to end. + * + * If for some reason the uclass cannot be found, this does nothing. + * + * @id: enum uclass_id ID to use + * @pos: struct udevice * to hold the current device. Set to NULL when there + * are no more devices. + * @uc: temporary uclass variable (struct udevice *) + */ +#define uclass_id_foreach_dev(id, pos, uc) \ + if (!uclass_get(id, &uc)) \ + list_for_each_entry(pos, &uc->dev_head, uclass_node) + +/** * uclass_foreach_dev() - Helper function to iteration through devices * * This creates a for() loop which works through the available devices in -- cgit v1.1