ieee802154: atusb: implement .set_csma_params ops callback

Catching up with the stack here and implement CSMA parameter setting.
Signed-off-by: NStefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/net/ieee802154/atusb.c

@@ -472,6 +472,23 @@ atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
 	return -EINVAL;
 }
 
+static int
+atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
+{
+	struct atusb *atusb = hw->priv;
+	int ret;
+
+	ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
+	if (ret)
+		return ret;
+
+	ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
+	if (ret)
+		return ret;
+
+	return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
+}
+
 static int
 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
 {
@@ -508,6 +525,7 @@ static struct ieee802154_ops atusb_ops = {
 	.stop			= atusb_stop,
 	.set_hw_addr_filt	= atusb_set_hw_addr_filt,
 	.set_txpower		= atusb_set_txpower,
+	.set_csma_params	= atusb_set_csma_params,
 	.set_promiscuous_mode	= atusb_set_promiscuous_mode,
 };
 
@@ -636,7 +654,7 @@ static int atusb_probe(struct usb_interface *interface,
 
 	hw->parent = &usb_dev->dev;
 	hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
-		    IEEE802154_HW_PROMISCUOUS;
+		    IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
 
 	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER;