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authorFabio Estevam <fabio.estevam@nxp.com>2016-01-05 17:02:53 -0200
committerStefano Babic <sbabic@denx.de>2016-01-07 17:47:12 +0100
commita307760ab48b428f4c2ac8b5676b29c56eee9f82 (patch)
tree602ba86e93057820b224f7650d605df463548342
parentd584c68ce0f5bf2f430ccfb2ba00bd506206fb91 (diff)
downloadblackbird-obmc-uboot-a307760ab48b428f4c2ac8b5676b29c56eee9f82.tar.gz
blackbird-obmc-uboot-a307760ab48b428f4c2ac8b5676b29c56eee9f82.zip
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>
-rw-r--r--board/freescale/mx6sabresd/mx6sabresd.c36
1 files changed, 2 insertions, 34 deletions
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 581c9d5560..d20953d2ca 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)
{
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