Subject: [PATCH RFC net-next 05/16] net: phy: bcm84881: implement phy_inband_caps() method

From: "Russell King (Oracle)" <[email-masked]>
Date: Tue, 26 Nov 2024 09:24:41 +0000

BCM84881 has no support for inband signalling, so this is a trivial
implementation that returns no support for inband.

Signed-off-by: Russell King (Oracle) <[email-masked]>
---
 drivers/net/phy/bcm84881.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/phy/bcm84881.c b/drivers/net/phy/bcm84881.c
index 97da3aee4942..47405bded677 100644
--- a/drivers/net/phy/bcm84881.c
+++ b/drivers/net/phy/bcm84881.c
@@ -235,11 +235,21 @@ static int bcm84881_read_status(struct phy_device *phydev)
 	return genphy_c45_read_mdix(phydev);
 }
 
+/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
+ * or 802.3z control word, so inband will not work.
+ */
+static unsigned int bcm84881_inband_caps(struct phy_device *phydev,
+					 phy_interface_t interface)
+{
+	return LINK_INBAND_DISABLE;
+}
+
 static struct phy_driver bcm84881_drivers[] = {
 	{
 		.phy_id		= 0xae025150,
 		.phy_id_mask	= 0xfffffff0,
 		.name		= "Broadcom BCM84881",
+		.inband_caps	= bcm84881_inband_caps,
 		.config_init	= bcm84881_config_init,
 		.probe		= bcm84881_probe,
 		.get_features	= bcm84881_get_features,
-- 
2.30.2