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generic: ar8216: improve ar8xxx_is_possible check

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The commit "generic: ar8216: add sanity check to ar8216_probe"
(774da6c7a4) stated that PHY IDs
should be checked at address 0-4. However, the PHY 4 was
never check by the loop. This patch extends the check to be
similar to the Atheors SDK. It tries all 4 ports and skips
unconnected PHYs if necessary. If it cannot find any familiar
PHYs, it will prevent the phy driver from initializing.

This patch is necessary for the C-60. It doesn't have a
PHY at port 3, so this caused the check in ar8xxx_is_possible
to fail. As a result, the ethernet ports on the C-60 didn't
work.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit is contained in:
Christian Lamparter 2016-10-05 15:19:34 +02:00 committed by John Crispin
parent bcfb535730
commit e9455c561d
1 changed files with 6 additions and 6 deletions
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12
target/linux/generic/files/drivers/net/phy/ar8216.c
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@ -2113,21 +2113,21 @@ ar8xxx_phy_match(u32 phy_id)
static bool static bool
ar8xxx_is_possible(struct mii_bus *bus) ar8xxx_is_possible(struct mii_bus *bus)
{ {
unsigned i; unsigned int i, found_phys = 0;
for (i = 0; i < 4; i++) { for (i = 0; i < 5; i++) {
u32 phy_id; u32 phy_id;
phy_id = mdiobus_read(bus, i, MII_PHYSID1) << 16; phy_id = mdiobus_read(bus, i, MII_PHYSID1) << 16;
phy_id |= mdiobus_read(bus, i, MII_PHYSID2); phy_id |= mdiobus_read(bus, i, MII_PHYSID2);
if (!ar8xxx_phy_match(phy_id)) { if (ar8xxx_phy_match(phy_id)) {
found_phys++;
} else if (phy_id) {
pr_debug("ar8xxx: unknown PHY at %s:%02x id:%08x\n", pr_debug("ar8xxx: unknown PHY at %s:%02x id:%08x\n",
dev_name(&bus->dev), i, phy_id); dev_name(&bus->dev), i, phy_id);
return false;
} }
} }
return !!found_phys;
return true;
} }
static int static int