qemu: Add patch to resolve MicroBlaze ethernet phy issues

* Add patch to resolve phy soft reset functionality which is relied on
  by newer kernel versions

Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>

2 files changed, 30 insertions, 0 deletions

diff --git a/recipes-devtools/qemu/files/hw-net-xilinx_axienet.c-Add-phy-soft-reset-bit-clear.patch b/recipes-devtools/qemu/files/hw-net-xilinx_axienet.c-Add-phy-soft-reset-bit-clear.patch
new file mode 100644
index 00000000..9bc7a564
--- /dev/null
+++ b/recipes-devtools/qemu/files/hw-net-xilinx_axienet.c-Add-phy-soft-reset-bit-clear.patch
@@ -0,0 +1,29 @@
+From 425580f9241098c9ef554a33b80153624b1e0318 Mon Sep 17 00:00:00 2001
+From: Nathan Rossi <nathan.rossi@xilinx.com>
+Date: Wed, 9 Apr 2014 11:15:25 +1000
+Subject: [PATCH] hw/net/xilinx_axienet.c: Add phy soft reset bit clearing
+
+* Clear the BMCR Reset when writing to registers.
+
+Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>
+---
+ hw/net/xilinx_axienet.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/hw/net/xilinx_axienet.c b/hw/net/xilinx_axienet.c
+index 3eb7715..d9c15df 100644
+--- a/hw/net/xilinx_axienet.c
++++ b/hw/net/xilinx_axienet.c
+@@ -142,6 +142,9 @@ tdk_write(struct PHY *phy, unsigned int req, unsigned int data)
+             phy->regs[regnum] = data;
+             break;
+     }
++
++    /* Unconditionally clear regs[BMCR][BMCR_RESET] */
++    phy->regs[0] &= ~0x8000;
+ }
+ 
+ static void
+-- 
+1.9.0
+
diff --git a/recipes-devtools/qemu/qemu_1.7.0.bbappend b/recipes-devtools/qemu/qemu_1.7.0.bbappend
index 4637cf0d..a06eefef 100644
--- a/recipes-devtools/qemu/qemu_1.7.0.bbappend
+++ b/recipes-devtools/qemu/qemu_1.7.0.bbappend
@@ -5,4 +5,5 @@ SRC_URI_append += " \
                 file://HACK_target-arm_Harcode_the_SCU_offset.patch \
                 file://HACK_zynq_slcr_Bring_SLCR_out_of_reset_in_kernel_state.patch \
                 file://qom_object_c_Split_out_object_and_class_caches.patch \
+                file://hw-net-xilinx_axienet.c-Add-phy-soft-reset-bit-clear.patch \
                 "