net: introduce helpers to get PHY ofnode from MAC

Add helpers ofnode_get_phy_node() and dev_get_phy_node() and use it in
net/mdio-uclass.c function dm_eth_connect_phy_handle(). Also add
corresponding UT test.

This is useful because other part's of U-Boot may want to get PHY ofnode
without connecting a PHY.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Marek Behún 2022-04-07 00:32:57 +02:00 committed by Ramon Fried
parent a7a96ef812
commit f3dd213e15
7 changed files with 96 additions and 18 deletions

View file

@ -1217,4 +1217,18 @@ int ofnode_conf_read_int(const char *prop_name, int default_val);
*/
const char *ofnode_conf_read_str(const char *prop_name);
/**
* ofnode_get_phy_node() - Get PHY node for a MAC (if not fixed-link)
*
* This function parses PHY handle from the Ethernet controller's ofnode
* (trying all possible PHY handle property names), and returns the PHY ofnode.
*
* Before this is used, ofnode_phy_is_fixed_link() should be checked first, and
* if the result to that is true, this function should not be called.
*
* @eth_node: ofnode belonging to the Ethernet controller
* Return: ofnode of the PHY, if it exists, otherwise an invalid ofnode
*/
ofnode ofnode_get_phy_node(ofnode eth_node);
#endif