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dm: core: Add a livetree function to check node status

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Add a way to find out if a node is enabled or not, based on its 'status'
property.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-11-28 17:50:02 -07:00
parent 734206dda1
commit 0de1b07406
3 changed files with 33 additions and 0 deletions
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11
include/dm/ofnode.h
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@ -345,6 +345,17 @@ const char *ofnode_read_string(ofnode node, const char *propname);
*/
int ofnode_read_u32_array(ofnode node, const char *propname,
u32 *out_values, size_t sz);
/**
* ofnode_is_enabled() - Checks whether a node is enabled.
* This looks for a 'status' property. If this exists, then returns true if
* the status is 'okay' and false otherwise. If there is no status property,
* it returns true on the assumption that anything mentioned should be enabled
* by default.
*
* @node: node to examine
* @return false (not enabled) or true (enabled)
*/
bool ofnode_is_enabled(ofnode node);
/**
* ofnode_read_bool() - read a boolean value from a property