tsec: Fix a bug in soft-resetting
SOFT_RESET must be asserted for at least 3 TX clocks. Usually, that's about 30
clock cycles, so it's been mostly working. But we had no guarantee, and at
slower bitrates, it's just over a microsecond (over 1000 clock cycles). This
enforces a 2 microsecond gap between assertion and deassertion.
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index dc90f23..9edba6a 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -158,6 +158,7 @@
/* Reset the MAC */
priv->regs->maccfg1 |= MACCFG1_SOFT_RESET;
+ udelay(2); /* Soft Reset must be asserted for 3 TX clocks */
priv->regs->maccfg1 &= ~(MACCFG1_SOFT_RESET);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) \