nl802154: add support for cca ed level info

This patch adds information about the current cca ed level when the phy
is dumped over nl802154.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/ieee802154/nl802154.c

@@ -211,6 +211,7 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
 
 	[NL802154_ATTR_CCA_MODE] = { .type = NLA_U32, },
 	[NL802154_ATTR_CCA_OPT] = { .type = NLA_U32, },
+	[NL802154_ATTR_CCA_ED_LEVEL] = { .type = NLA_S32, },
 
 	[NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
 
@@ -421,6 +422,12 @@ static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev,
 			goto nla_put_failure;
 	}
 
+	if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
+		if (nla_put_s32(msg, NL802154_ATTR_CCA_ED_LEVEL,
+				rdev->wpan_phy.cca_ed_level))
+			goto nla_put_failure;
+	}
+
 	if (nl802154_put_capabilities(msg, rdev))
 		goto nla_put_failure;