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-rw-r--r--board/sunxi/gmac.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/board/sunxi/gmac.c b/board/sunxi/gmac.c
index e7ff952..6348d27 100644
--- a/board/sunxi/gmac.c
+++ b/board/sunxi/gmac.c
@@ -24,6 +24,15 @@ int sunxi_gmac_initialize(bd_t *bis)
CCM_GMAC_CTRL_GPIT_MII);
#endif
+ /*
+ * In order for the gmac nic to work reliable on the Bananapi, we
+ * need to set bits 10-12 GTXDC "GMAC Transmit Clock Delay Chain"
+ * of the GMAC clk register to 3.
+ */
+#ifdef CONFIG_BANANAPI
+ setbits_le32(&ccm->gmac_clk_cfg, 0x3 << 10);
+#endif
+
/* Configure pin mux settings for GMAC */
for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(16); pin++) {
#ifdef CONFIG_RGMII