mx6sabresd: Simplify the Ethernet PHY configuration

As per the AR8031 datasheet:

"For a reliable power on reset, suggest to keep asserting the reset
low long enough (10ms) to ensure the clock is stable and clock-to-reset
1ms requirement is satisfied."

So do as suggested and also add a 100us delay after deasserting the
reset line to guarantee that the PHY ID can be read correctly and the
Atheros 8031 PHY driver can be loaded automatically.

This results in a simpler code.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 581c9d5560d0a6821f6c1730002419bb484c5a3b..d20953d2ca48411024e04f7f04c38704ff5fc8f0 100644 (file)
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -94,8 +94,9 @@ static void setup_iomux_enet(void)
 
        /* Reset AR8031 PHY */
        gpio_direction_output(IMX_GPIO_NR(1, 25) , 0);
-       udelay(500);
+       mdelay(10);
        gpio_set_value(IMX_GPIO_NR(1, 25), 1);
+       udelay(100);
 }
 
 static iomux_v3_cfg_t const usdhc2_pads[] = {
@@ -340,39 +341,6 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
-int mx6_rgmii_rework(struct phy_device *phydev)
-{
-       unsigned short val;
-
-       /* To enable AR8031 ouput a 125MHz clk from CLK_25M */
-       phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x7);
-       phy_write(phydev, MDIO_DEVAD_NONE, 0xe, 0x8016);
-       phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x4007);
-
-       val = phy_read(phydev, MDIO_DEVAD_NONE, 0xe);
-       val &= 0xffe3;
-       val |= 0x18;
-       phy_write(phydev, MDIO_DEVAD_NONE, 0xe, val);
-
-       /* introduce tx clock delay */
-       phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x5);
-       val = phy_read(phydev, MDIO_DEVAD_NONE, 0x1e);
-       val |= 0x0100;
-       phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, val);
-
-       return 0;
-}
-
-int board_phy_config(struct phy_device *phydev)
-{
-       mx6_rgmii_rework(phydev);
-
-       if (phydev->drv->config)
-               phydev->drv->config(phydev);
-
-       return 0;
-}
-
 #if defined(CONFIG_VIDEO_IPUV3)
 static void disable_lvds(struct display_info_t const *dev)
 {