ieee820154: add backoff exponent setting support

This patch adds support for setting backoff exponents via nl802154
framework.

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

1 files changed, 18 insertions, 0 deletions

diff --git a/net/mac802154/cfg.c b/net/mac802154/cfg.c
index df29976d1321..67c96f981693 100644
--- a/net/mac802154/cfg.c
+++ b/net/mac802154/cfg.c
@@ -84,6 +84,23 @@ static int ieee802154_set_pan_id(struct wpan_phy *wpan_phy,
 }
 
 static int
+ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
+                                struct wpan_dev *wpan_dev,
+                                const u8 min_be, const u8 max_be)
+{
+        struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
+
+        ASSERT_RTNL();
+
+        if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))
+                return -EOPNOTSUPP;
+
+        wpan_dev->min_be = min_be;
+        wpan_dev->max_be = max_be;
+        return 0;
+}
+
+static int
 ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
                           const u16 short_addr)
 {
@@ -114,4 +131,5 @@ const struct cfg802154_ops mac802154_config_ops = {
         .set_channel = ieee802154_set_channel,
         .set_pan_id = ieee802154_set_pan_id,
         .set_short_addr = ieee802154_set_short_addr,
+        .set_backoff_exponent = ieee802154_set_backoff_exponent,
 };