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tsec: Fix a bug in soft-resetting

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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>
This commit is contained in:
Andy Fleming 2009-02-03 18:26:41 -06:00 • committed by Ben Warren
parent 09fcc8b5d8
commit 9e5be8214b
1 changed files with 1 additions and 0 deletions
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drivers/net/tsec.c
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@ -158,6 +158,7 @@ int tsec_initialize(bd_t * bis, struct tsec_info_struct *tsec_info)
/* 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) \