From 1da7756e6616c7795c8a104fde0a66f212ef659d Mon Sep 17 00:00:00 2001 From: Serge Semin Date: Thu, 9 May 2019 00:51:17 +0300 Subject: [PATCH] net: phy: realtek: Change TX-delay setting for RGMII modes only It's prone to problems if delay is cleared out for other than RGMII modes. So lets set/clear the TX-delay in the config register only if actually RGMII-like interface mode is requested. This only concerns rtl8211f chips. Signed-off-by: Serge Semin Signed-off-by: David S. Miller --- drivers/net/phy/realtek.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index cfbc0ca..761ce3b 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -161,12 +161,23 @@ static int rtl8211c_config_init(struct phy_device *phydev) static int rtl8211f_config_init(struct phy_device *phydev) { - u16 val = 0; + u16 val; - /* enable TX-delay for rgmii-id and rgmii-txid, otherwise disable it */ - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || - phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) + /* enable TX-delay for rgmii-{id,txid}, and disable it for rgmii and + * rgmii-rxid. The RX-delay can be enabled by the external RXDLY pin. + */ + switch (phydev->interface) { + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_RXID: + val = 0; + break; + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_TXID: val = RTL8211F_TX_DELAY; + break; + default: /* the rest of the modes imply leaving delay as is. */ + return 0; + } return phy_modify_paged(phydev, 0xd08, 0x11, RTL8211F_TX_DELAY, val); } -- 2.7.4