From: Fabio Estevam fabio.estevam@nxp.com
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 --- This is 2016.04 material.
board/freescale/mx6sabresd/mx6sabresd.c | 36 ++------------------------------- 1 file changed, 2 insertions(+), 34 deletions(-)
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 581c9d5..d20953d 100644 --- 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) {