net: ethernet: nb8800: Do not apply TX delay at MAC level

This is v2 of the series, only the second patch:
"net: ethernet: nb8800: handle all RGMII definitions" is modified to account for Florian's suggestion.

Sebastian Frias (2):
net: ethernet: nb8800: Do not apply TX delay at MAC level
net: ethernet: nb8800: handle all RGMII definitions

 drivers/net/ethernet/aurora/nb8800.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

1.7.11.2

The delay can be applied at PHY or MAC level, but since PHY drivers will apply the delay at PHY level when using one of the "internal delay" declinations of RGMII mode (like PHY_INTERFACE_MODE_RGMII_TXID), applying it again at MAC level causes issues.

---
drivers/net/ethernet/aurora/nb8800.c | 2 +-

1 file changed, 1 insertion(+), 1 deletion(-)

index b59aa35..d2855c9 100644
@@ -1282,7 +1282,7 @@ static int nb8800_tangox_init(struct net_device *dev)

break;

case PHY_INTERFACE_MODE_RGMII_TXID:
- pad_mode = PAD_MODE_RGMII | PAD_MODE_GTX_CLK_DELAY;
+ pad_mode = PAD_MODE_RGMII;
break;

default:

1.7.11.2

Commit a999589ccaae ("phylib: add RGMII-ID interface mode definition") and commit 7d400a4c5897 ("phylib: add PHY interface modes for internal delay for tx and rx only") added several RGMII definitions:
PHY_INTERFACE_MODE_RGMII_ID, PHY_INTERFACE_MODE_RGMII_RXID and PHY_INTERFACE_MODE_RGMII_TXID to deal with internal delays.

Those are all RGMII modes (1Gbit) and must be considered that way when setting the MAC mode or the pad mode for the HW to work properly.

---
drivers/net/ethernet/aurora/nb8800.c | 8 ++++----

1 file changed, 4 insertions(+), 4 deletions(-)

index d2855c9..fba2699 100644
@@ -598,6 +598,7 @@ static irqreturn_t nb8800_irq(int irq, void *dev_id)

static void nb8800_mac_config(struct net_device *dev)
{
struct nb8800_priv *priv = netdev_priv(dev);
+ struct phy_device *phydev = dev->phydev;
bool gigabit = priv->speed == SPEED_1000;
u32 mac_mode_mask = RGMII_MODE | HALF_DUPLEX | GMAC_MODE;
u32 mac_mode = 0;
@@ -609,7 +610,7 @@ static void nb8800_mac_config(struct net_device *dev) mac_mode |= HALF_DUPLEX;

if (gigabit) {
- if (priv->phy_mode == PHY_INTERFACE_MODE_RGMII)
+ if (phy_interface_is_rgmii(phydev))
mac_mode |= RGMII_MODE;

mac_mode |= GMAC_MODE;
@@ -1278,9 +1279,8 @@ static int nb8800_tangox_init(struct net_device *dev) break;

case PHY_INTERFACE_MODE_RGMII:
- pad_mode = PAD_MODE_RGMII;
- break;
-
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
pad_mode = PAD_MODE_RGMII;
break;

1.7.11.2