[PATCH RFC net-next 14/16] net: pcs: xpcs: implement pcs_inband_caps() method

["Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>]

Report the PCS inband capabilities to phylink for XPCS.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 drivers/net/pcs/pcs-xpcs.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 7246a910728d..f70ca39f0905 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -567,6 +567,33 @@ static int xpcs_validate(struct phylink_pcs *pcs, unsigned long *supported,
 	return 0;
 }
 
+static unsigned int xpcs_inband_caps(struct phylink_pcs *pcs,
+				     phy_interface_t interface)
+{
+	struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
+	const struct dw_xpcs_compat *compat;
+
+	compat = xpcs_find_compat(xpcs, interface);
+	if (!compat)
+		return 0;
+
+	switch (compat->an_mode) {
+	case DW_AN_C73:
+		return LINK_INBAND_ENABLE;
+
+	case DW_AN_C37_SGMII:
+	case DW_AN_C37_1000BASEX:
+		return LINK_INBAND_DISABLE | LINK_INBAND_ENABLE;
+
+	case DW_10GBASER:
+	case DW_2500BASEX:
+		return LINK_INBAND_DISABLE;
+
+	default:
+		return 0;
+	}
+}
+
 void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces)
 {
 	const struct dw_xpcs_compat *compat;
@@ -1306,6 +1333,7 @@ static const struct dw_xpcs_desc xpcs_desc_list[] = {
 
 static const struct phylink_pcs_ops xpcs_phylink_ops = {
 	.pcs_validate = xpcs_validate,
+	.pcs_inband_caps = xpcs_inband_caps,
 	.pcs_pre_config = xpcs_pre_config,
 	.pcs_config = xpcs_config,
 	.pcs_get_state = xpcs_get_state,
-- 
2.30.2