diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 3e587d7..d09a16f 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -1216,6 +1216,31 @@
 	}
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/UpdateTxCalLadder */
+static void b43_nphy_update_tx_cal_ladder(struct b43_wldev *dev, u16 core)
+{
+	struct b43_phy_n *nphy = dev->phy.n;
+	int i;
+	u16 scale, entry;
+
+	u16 tmp = nphy->txcal_bbmult;
+	if (core == 0)
+		tmp >>= 8;
+	tmp &= 0xff;
+
+	for (i = 0; i < 18; i++) {
+		scale = (ladder_lo[i].percent * tmp) / 100;
+		entry = ((scale & 0xFF) << 8) | ladder_lo[i].g_env;
+		/* TODO: Write an N PHY Table with ID 15, length 1,
+			offset i, width 16, and data entry */
+
+		scale = (ladder_iq[i].percent * tmp) / 100;
+		entry = ((scale & 0xFF) << 8) | ladder_iq[i].g_env;
+		/* TODO: Write an N PHY Table with ID 15, length 1,
+			offset i + 32, width 16, and data entry */
+	}
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/GetTxGain */
 static struct nphy_txgains b43_nphy_get_tx_gains(struct b43_wldev *dev)
 {