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net: phy: microchip_t1: add lan87xx_config_rgmii_delay for lan87xx phy

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Add a function to initialize phy rgmii delay according to phydev->interface.

Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20211101162119.29275-1-yuiko.oshino@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yuiko Oshino 2021-11-01 12:21:19 -04:00 committed by Jakub Kicinski
parent cc0356d6a0
commit 26499499ca
1 changed files with 43 additions and 1 deletions
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44
drivers/net/phy/microchip_t1.c
View file

@ -28,6 +28,11 @@
#define LAN87XX_MASK_LINK_UP (0x0004)
#define LAN87XX_MASK_LINK_DOWN (0x0002)
/* MISC Control 1 Register */
#define LAN87XX_CTRL_1 (0x11)
#define LAN87XX_MASK_RGMII_TXC_DLY_EN (0x4000)
#define LAN87XX_MASK_RGMII_RXC_DLY_EN (0x2000)
/* phyaccess nested types */
#define PHYACC_ATTR_MODE_READ 0
#define PHYACC_ATTR_MODE_WRITE 1
@ -112,6 +117,43 @@ static int access_ereg_modify_changed(struct phy_device *phydev,
return rc;
}
static int lan87xx_config_rgmii_delay(struct phy_device *phydev)
{
int rc;
if (!phy_interface_is_rgmii(phydev))
return 0;
rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
PHYACC_ATTR_BANK_MISC, LAN87XX_CTRL_1, 0);
if (rc < 0)
return rc;
switch (phydev->interface) {
case PHY_INTERFACE_MODE_RGMII:
rc &= ~LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc &= ~LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_ID:
rc |= LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc |= LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
rc &= ~LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc |= LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
rc |= LAN87XX_MASK_RGMII_TXC_DLY_EN;
rc &= ~LAN87XX_MASK_RGMII_RXC_DLY_EN;
break;
default:
return 0;
}
return access_ereg(phydev, PHYACC_ATTR_MODE_WRITE,
PHYACC_ATTR_BANK_MISC, LAN87XX_CTRL_1, rc);
}
static int lan87xx_phy_init(struct phy_device *phydev)
{
static const struct access_ereg_val init[] = {
@ -185,7 +227,7 @@ static int lan87xx_phy_init(struct phy_device *phydev)
return rc;
}
return 0;
return lan87xx_config_rgmii_delay(phydev);
}
static int lan87xx_phy_config_intr(struct phy_device *phydev)