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Merge branch 'net-phy-Eliminate-unnecessary-soft'

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Florian Fainelli says:

====================
net: phy: Eliminate unnecessary soft

This patch series eliminates unnecessary software resets of the PHY.
This should hopefully not break anybody's hardware; but I would
appreciate testing to make sure this is is the case.

Sorry for this long email list, I wanted to make sure I reached out to
all people who made changes to the Marvell PHY driver.

Thank you!

Changes since RFT:

- added Tested-by tags from Wang, Dongsheng, Andrew, Chris and Clemens
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-09-25 20:26:45 -07:00
commit 921f432cea
2 changed files with 23 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
drivers/net/phy/marvell.c
View File

@ -265,7 +265,7 @@ static int marvell_set_polarity(struct phy_device *phydev, int polarity)
return err;
}
return 0;
return val != reg;
}
static int marvell_set_downshift(struct phy_device *phydev, bool enable,
@ -287,12 +287,15 @@ static int marvell_set_downshift(struct phy_device *phydev, bool enable,
static int marvell_config_aneg(struct phy_device *phydev)
{
int changed = 0;
int err;
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
if (err < 0)
return err;
changed = err;
err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
MII_M1111_PHY_LED_DIRECT);
if (err < 0)
@ -302,7 +305,7 @@ static int marvell_config_aneg(struct phy_device *phydev)
if (err < 0)
return err;
if (phydev->autoneg != AUTONEG_ENABLE) {
if (phydev->autoneg != AUTONEG_ENABLE || changed) {
/* A write to speed/duplex bits (that is performed by
* genphy_config_aneg() call above) must be followed by
* a software reset. Otherwise, the write has no effect.
@ -350,42 +353,6 @@ static int m88e1101_config_aneg(struct phy_device *phydev)
return marvell_config_aneg(phydev);
}
static int m88e1111_config_aneg(struct phy_device *phydev)
{
int err;
/* The Marvell PHY has an errata which requires
* that certain registers get written in order
* to restart autonegotiation
*/
err = genphy_soft_reset(phydev);
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
if (err < 0)
return err;
err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
MII_M1111_PHY_LED_DIRECT);
if (err < 0)
return err;
err = genphy_config_aneg(phydev);
if (err < 0)
return err;
if (phydev->autoneg != AUTONEG_ENABLE) {
/* A write to speed/duplex bits (that is performed by
* genphy_config_aneg() call above) must be followed by
* a software reset. Otherwise, the write has no effect.
*/
err = genphy_soft_reset(phydev);
if (err < 0)
return err;
}
return 0;
}
#ifdef CONFIG_OF_MDIO
/* Set and/or override some configuration registers based on the
* marvell,reg-init property stored in the of_node for the phydev.
@ -479,6 +446,7 @@ static int m88e1121_config_aneg_rgmii_delays(struct phy_device *phydev)
static int m88e1121_config_aneg(struct phy_device *phydev)
{
int changed = 0;
int err = 0;
if (phy_interface_is_rgmii(phydev)) {
@ -487,15 +455,26 @@ static int m88e1121_config_aneg(struct phy_device *phydev)
return err;
}
err = genphy_soft_reset(phydev);
if (err < 0)
return err;
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
if (err < 0)
return err;
return genphy_config_aneg(phydev);
changed = err;
err = genphy_config_aneg(phydev);
if (err < 0)
return err;
if (phydev->autoneg != autoneg || changed) {
/* A software reset is used to ensure a "commit" of the
* changes is done.
*/
err = genphy_soft_reset(phydev);
if (err < 0)
return err;
}
return 0;
}
static int m88e1318_config_aneg(struct phy_device *phydev)
@ -2067,7 +2046,7 @@ static struct phy_driver marvell_drivers[] = {
.flags = PHY_HAS_INTERRUPT,
.probe = marvell_probe,
.config_init = &m88e1111_config_init,
.config_aneg = &m88e1111_config_aneg,
.config_aneg = &marvell_config_aneg,
.read_status = &marvell_read_status,
.ack_interrupt = &marvell_ack_interrupt,
.config_intr = &marvell_config_intr,

2
drivers/net/phy/phy_device.c
View File

@ -880,8 +880,6 @@ int phy_init_hw(struct phy_device *phydev)
if (phydev->drv->soft_reset)
ret = phydev->drv->soft_reset(phydev);
else
ret = genphy_soft_reset(phydev);
if (ret < 0)
return ret;