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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-01-14 14:38:02 -0800
committerDavid S. Miller <davem@davemloft.net>2009-01-14 14:38:02 -0800
commitf0d44ae310bc8eb0b6694e257015d8b24e1a357c (patch)
tree5687fbe1f5c7e2eeaa55de384b58f0764fae6ab8 /drivers/net/phy/phy_device.c
parentf17f5c91ae3bfeb5cfc37fa132a5fdfceb8927be (diff)
downloadlinux-linaro-android-f0d44ae310bc8eb0b6694e257015d8b24e1a357c.tar.gz
phylib: Fix Freescale TBI PHY detection
Freescale on-chip TBI PHYs reports PHY ID as 0x0, but as of commit 3ee82383f0098a2e13acc8cf1be8e47512f41e5a Author: Giulio Benetti <giulio.benetti@micronovasrl.com> Date: Thu Nov 13 21:53:13 2008 +0000 phy: fix phy address bug PHYID returns 0xffff and not 0xffffffff when not found and in some case(at91sam9263) 0x0. Maybe this patch could be useful. phy_device.c treats PHY ID == 0x0 as bogus IDs, and that results in gianfar driver failure to see the TBI PHYs. This code snippet triggers: if (!priv->tbiphy) { printk(KERN_WARNING "SGMII mode requires that the device " "tree specify a tbi-handle\n"); return; } Although tbi-handle is specified in the device tree. Btw, technically PHY ID == 0x0 is a valid ID (if we ever see a PHY manufactured by Xerox :-). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phy_device.c')
-rw-r--r--drivers/net/phy/phy_device.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index e35460165bf..0a06e4fd37d 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -231,15 +231,6 @@ struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
if ((phy_id & 0x1fffffff) == 0x1fffffff)
return NULL;
- /*
- * Broken hardware is sometimes missing the pull-up resistor on the
- * MDIO line, which results in reads to non-existent devices returning
- * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
- * device as well.
- */
- if (phy_id == 0)
- return NULL;
-
dev = phy_device_create(bus, addr, phy_id);
return dev;