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net: phy: Allow BCM54616S PHY to setup internal TX/RX clock delay 

This patch allows users to enable/disable internal TX and/or RX clock
delay for BCM54616S PHYs so as to satisfy RGMII timing specifications.

On a particular platform, whether TX and/or RX clock delay is required
depends on how PHY connected to the MAC IP. This requirement can be
specified through "phy-mode" property in the platform device tree.

The patch is inspired by commit 733336262b ("net: phy: Allow BCM5481x
PHYs to setup internal TX/RX clock delay").

Signed-off-by: Tao Ren <taoren@fb.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tao Ren 2018-11-05 14:35:40 -08:00 committed by David S. Miller
parent 8053e5b93e
commit 042cb56478
1 changed files with 16 additions and 2 deletions
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18
drivers/net/phy/broadcom.c
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@ -92,7 +92,7 @@ static int bcm54612e_config_init(struct phy_device *phydev)
return 0;
}
static int bcm5481x_config(struct phy_device *phydev)
static int bcm54xx_config_clock_delay(struct phy_device *phydev)
{
int rc, val;
@ -429,7 +429,7 @@ static int bcm5481_config_aneg(struct phy_device *phydev)
ret = genphy_config_aneg(phydev);
/* Then we can set up the delay. */
bcm5481x_config(phydev);
bcm54xx_config_clock_delay(phydev);
if (of_property_read_bool(np, "enet-phy-lane-swap")) {
/* Lane Swap - Undocumented register...magic! */
@ -442,6 +442,19 @@ static int bcm5481_config_aneg(struct phy_device *phydev)
return ret;
}
static int bcm54616s_config_aneg(struct phy_device *phydev)
{
int ret;
/* Aneg firsly. */
ret = genphy_config_aneg(phydev);
/* Then we can set up the delay. */
bcm54xx_config_clock_delay(phydev);
return ret;
}
static int brcm_phy_setbits(struct phy_device *phydev, int reg, int set)
{
int val;
@ -636,6 +649,7 @@ static struct phy_driver broadcom_drivers[] = {
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = bcm54616s_config_aneg,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
}, {