This patch adds ability to switch beetween two PHY SGMII modes. Some hardware, for example, FPGA IP designs may use 6-wire mode which enables differential SGMII clock to MAC.
Signed-off-by: Vitaly Gaiduk <[email protected]> --- Changes in v3: - Fixed retaining DP83867_SGMII_TYPE bit drivers/net/phy/dp83867.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c index 1f1ecee..37fceaf 100644 --- a/drivers/net/phy/dp83867.c +++ b/drivers/net/phy/dp83867.c @@ -37,6 +37,7 @@ #define DP83867_STRAP_STS2 0x006f #define DP83867_RGMIIDCTL 0x0086 #define DP83867_IO_MUX_CFG 0x0170 +#define DP83867_SGMIICTL 0x00D3 #define DP83867_10M_SGMII_CFG 0x016F #define DP83867_10M_SGMII_RATE_ADAPT_MASK BIT(7) @@ -61,6 +62,9 @@ #define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1) #define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0) +/* SGMIICTL bits */ +#define DP83867_SGMII_TYPE BIT(14) + /* STRAP_STS1 bits */ #define DP83867_STRAP_STS1_RESERVED BIT(11) @@ -109,6 +113,7 @@ struct dp83867_private { bool rxctrl_strap_quirk; bool set_clk_output; u32 clk_output_sel; + bool sgmii_ref_clk_en; }; static int dp83867_ack_interrupt(struct phy_device *phydev) @@ -197,6 +202,9 @@ static int dp83867_of_init(struct phy_device *phydev) dp83867->rxctrl_strap_quirk = of_property_read_bool(of_node, "ti,dp83867-rxctrl-strap-quirk"); + dp83867->sgmii_ref_clk_en = of_property_read_bool(of_node, + "ti,sgmii-ref-clock-output-enable"); + /* Existing behavior was to use default pin strapping delay in rgmii * mode, but rgmii should have meant no delay. Warn existing users. */ @@ -389,6 +397,17 @@ static int dp83867_config_init(struct phy_device *phydev) if (ret) return ret; + + val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL); + /* SGMII type is set to 4-wire mode by default. + * If we place appropriate property in dts (see above) + * switch on 6-wire mode. + */ + if (dp83867->sgmii_ref_clk_en) + val |= DP83867_SGMII_TYPE; + else + val &= ~DP83867_SGMII_TYPE; + phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL, val); } /* Enable Interrupt output INT_OE in CFG3 register */ -- 2.7.4
