mpc83xx: add a workaround for erratum eTSEC27 in earlier mpc8313 chip revs

SVN-Revision: 19670

diff --git a/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch b/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch
new file mode 100644 (file)
index 0000000..111434b
--- /dev/null
+++ b/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch
@@ -0,0 +1,18 @@
+--- a/drivers/net/gianfar.c
++++ b/drivers/net/gianfar.c
+@@ -334,7 +334,14 @@ static int gfar_probe(struct of_device *
+       /* We need to delay at least 3 TX clocks */
+       udelay(2);
+ 
+-      tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
++      /*
++       * Do not enable flow control on chips earlier than rev 1.1,
++       * because of the eTSEC27 erratum
++       */
++      tempval = 0;
++      if (mfspr(SPRN_SVR) & 0xffff >= 0x0011)
++              tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
++
+       gfar_write(&priv->regs->maccfg1, tempval);
+ 
+       /* Initialize MACCFG2. */