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| author | Fabio Estevam <fabio.estevam@nxp.com> | 2016-01-05 17:02:53 -0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-01-07 17:47:12 +0100 |
| commit | a307760ab48b428f4c2ac8b5676b29c56eee9f82 (patch) | |
| tree | 602ba86e93057820b224f7650d605df463548342 /board/freescale/mx6sabresd/mx6sabresd.c | |
| parent | d584c68ce0f5bf2f430ccfb2ba00bd506206fb91 (diff) | |
| download | u-boot-imx-a307760ab48b428f4c2ac8b5676b29c56eee9f82.zip u-boot-imx-a307760ab48b428f4c2ac8b5676b29c56eee9f82.tar.gz u-boot-imx-a307760ab48b428f4c2ac8b5676b29c56eee9f82.tar.bz2 | |
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>
Diffstat (limited to 'board/freescale/mx6sabresd/mx6sabresd.c')
| -rw-r--r-- | board/freescale/mx6sabresd/mx6sabresd.c | 36 |
1 files 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) { |