From: Tommaso Merciai tommaso.merciai@amarulasolutions.com
[ Upstream commit 621427fbdada788f18f77238e1c36f463c2cb9d1 ]
RGMII mode can be enable from dp83822 straps, and also writing bit 9 of register 0x17 - RMII and Status Register (RCSR). When phy_interface_is_rgmii rgmii mode must be enabled, same for contrary, this prevents malconfigurations of hw straps
References: - https://www.ti.com/lit/gpn/dp83822i p66
Signed-off-by: Tommaso Merciai tommaso.merciai@amarulasolutions.com Co-developed-by: Michael Trimarchi michael@amarulasolutions.com Suggested-by: Alberto Bianchi alberto.bianchi@amarulasolutions.com Tested-by: Tommaso Merciai tommaso.merciai@amarulasolutions.com Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: c8a5c731fd12 ("net: phy: dp83822: Fix RGMII TX delay configuration") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/dp83822.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c index f070aa97c77b4..267e6fd3d4448 100644 --- a/drivers/net/phy/dp83822.c +++ b/drivers/net/phy/dp83822.c @@ -94,7 +94,8 @@ #define DP83822_WOL_INDICATION_SEL BIT(8) #define DP83822_WOL_CLR_INDICATION BIT(11)
-/* RSCR bits */ +/* RCSR bits */ +#define DP83822_RGMII_MODE_EN BIT(9) #define DP83822_RX_CLK_SHIFT BIT(12) #define DP83822_TX_CLK_SHIFT BIT(11)
@@ -407,6 +408,12 @@ static int dp83822_config_init(struct phy_device *phydev) if (err) return err; } + + phy_set_bits_mmd(phydev, DP83822_DEVADDR, + MII_DP83822_RCSR, DP83822_RGMII_MODE_EN); + } else { + phy_clear_bits_mmd(phydev, DP83822_DEVADDR, + MII_DP83822_RCSR, DP83822_RGMII_MODE_EN); }
if (dp83822->fx_enabled) {