uboot-sunxi: add patch to fix gmac reliability issue on bananapi

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

SVN-Revision: 42691

package/boot/uboot-sunxi/patches/003-uboot-fix-gmac-not-working-reliable-on-bananapi.patch

@@ -0,0 +1,20 @@
+diff --git a/board/sunxi/gmac.c b/board/sunxi/gmac.c
+index e7ff952..f58c963 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
+ 
++	/*
++	 * HdG: this is necessary to get GMAC to work reliable on the
++	 * Bananapi. We don't know what these undocumented bits do, so this
++	 * is a Bananapi specific hack for now.
++	 */
++#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