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phy/micrel: Implement support for KSZ8021

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The KSZ8021 PHY was previously caught by KS8051, which is not correct.
This PHY needs additional setup if it is strapped for address 0. In such
case an reserved bit must be written in the 0x16, "Operation Mode Strap
Override" register. According to the KS8051 datasheet, that bit means
"PHY Address 0 in non-broadcast" and it indeed behaves as such on KSZ8021.
The issue where the ethernet controller (Freescale FEC) did not communicate
with network is fixed by writing this bit as 1.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David J. Choi <david.choi@micrel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marek Vasut
2012-09-23 16:58:49 +00:00
committed by David S. Miller
parent 2b018d57ff
commit 212ea99a85
2 changed files with 28 additions and 0 deletions
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include/linux/micrel_phy.h
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@@ -5,6 +5,7 @@
#define PHY_ID_KSZ9021 0x00221610
#define PHY_ID_KS8737 0x00221720
#define PHY_ID_KSZ8021 0x00221555
#define PHY_ID_KS8041 0x00221510
#define PHY_ID_KS8051 0x00221550
/* both for ks8001 Rev. A/B, and for ks8721 Rev 3. */