phy: add of_set_phy_supported() helper, call from phy_config()WIP/2023-01-26-assorted-updates

Currently, U-Boot doesn't parse a "max-speed" DT property in a phy's
DT node. That property is a standard binding which should be honoured,
and in linux that is done by the core phy code via a call to an
of_set_phy_supported() helper. (Some ethernet drivers support a
max-speed property in their DT node, but that's orthogonal to what the
phy supports.)

Add a similar helper in U-Boot, and call it from phy_config().

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 80230b9..c793694 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -602,6 +602,20 @@ int phy_register(struct phy_driver *drv)
 	return 0;
 }
 
+static int of_set_phy_supported(struct phy_device *phydev)
+{
+	ofnode node = phy_get_ofnode(phydev);
+	u32 max_speed;
+
+	if (!ofnode_valid(node))
+		return 0;
+
+	if (!ofnode_read_u32(node, "max-speed", &max_speed))
+		return phy_set_supported(phydev, max_speed);
+
+	return 0;
+}
+
 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 {
 	/* The default values for phydev->supported are provided by the PHY
@@ -1060,6 +1074,12 @@ __weak int board_phy_config(struct phy_device *phydev)
 
 int phy_config(struct phy_device *phydev)
 {
+	int ret;
+
+	ret = of_set_phy_supported(phydev);
+	if (ret)
+		return ret;
+
 	/* Invoke an optional board-specific helper */
 	return board_phy_config(phydev);
 }