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smsc911x: add external phy detection overrides

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On LAN9115/LAN9117/LAN9215/LAN9217, external phys are supported.  These
are usually indicated by a hardware strap which sets an "external PHY
detected" bit in the HW_CFG register.

In some cases it is desirable to override this hardware strap and force
use of either the internal phy or an external PHY.  This patch adds
SMSC911X_FORCE_INTERNAL_PHY and SMSC911X_FORCE_EXTERNAL_PHY flags so a
platform can indicate this preference via its platform_data.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Glendinning 2009-01-27 06:51:11 +00:00 • committed by David S. Miller
parent e81259b4f7
commit d23f028a4d
2 changed files with 40 additions and 37 deletions
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2
include/linux/smsc911x.h
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@ -43,5 +43,7 @@ struct smsc911x_platform_config {
/* Constants for flags */
#define SMSC911X_USE_16BIT (BIT(0))
#define SMSC911X_USE_32BIT (BIT(1))
#define SMSC911X_FORCE_INTERNAL_PHY (BIT(2))
#define SMSC911X_FORCE_EXTERNAL_PHY (BIT(3))
#endif /* __LINUX_SMSC911X_H__ */