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net: phy: micrel: make sure the factory test bit is cleared

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The KSZ8081 PHY has a factory test mode which is set at the de-assertion
of the reset line based on the RXER (KSZ8081RNA/RND) or TXC
(KSZ8081MNX/RNB) pin. If a pull-down is missing, or if the pin has a
pull-up, the factory test mode should be cleared by manually writing a 0
(according to the datasheet).
Create another ksz8081_config function to handle this case.

Suggested-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Nicolas Ferre 2019-10-23 10:46:44 +00:00 committed by Joe Hershberger
parent 19820db0bd
commit b2f2643b39
1 changed files with 20 additions and 1 deletions
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21
drivers/net/phy/micrel_ksz8xxx.c
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@ -24,6 +24,7 @@ static struct phy_driver KSZ804_driver = {
};
#define MII_KSZPHY_OMSO 0x16
#define KSZPHY_OMSO_FACTORY_TEST BIT(15)
#define KSZPHY_OMSO_B_CAST_OFF (1 << 9)
static int ksz_genconfig_bcastoff(struct phy_device *phydev)
@ -80,12 +81,30 @@ static struct phy_driver KSZ8051_driver = {
.shutdown = &genphy_shutdown,
};
static int ksz8081_config(struct phy_device *phydev)
{
int ret;
ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZPHY_OMSO);
if (ret < 0)
return ret;
ret &= ~KSZPHY_OMSO_FACTORY_TEST;
ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_KSZPHY_OMSO,
ret | KSZPHY_OMSO_B_CAST_OFF);
if (ret < 0)
return ret;
return genphy_config(phydev);
}
static struct phy_driver KSZ8081_driver = {
.name = "Micrel KSZ8081",
.uid = 0x221560,
.mask = 0xfffff0,
.features = PHY_BASIC_FEATURES,
.config = &ksz_genconfig_bcastoff,
.config = &ksz8081_config,
.startup = &genphy_startup,
.shutdown = &genphy_shutdown,
};