diff options
| author | Philippe Schenker <philippe.schenker@toradex.com> | 2020-03-11 11:59:24 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2020-05-01 13:46:22 +0200 |
| commit | 22b56f428d40c681c0bac1c4b042980b160d591d (patch) | |
| tree | 6780bc02261356049b074489cfe06d5486de1e28 | |
| parent | c51eef5924d748f4a6c4b0263a0b570f57709fc9 (diff) | |
| download | u-boot-22b56f428d40c681c0bac1c4b042980b160d591d.tar.gz | |
verdin-imx8mm: Change board phy skew values for our ksz9031
This patches uses the existing functions for interacting with the
KSZ9031 and uses the values appropriate for our board.
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Tested-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Igor Opaniuk <igor.opaniuk@toradex.com>
| -rw-r--r-- | board/toradex/verdin-imx8mm/verdin-imx8mm.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/board/toradex/verdin-imx8mm/verdin-imx8mm.c b/board/toradex/verdin-imx8mm/verdin-imx8mm.c index cb9b4e3b0a..15ae21c03c 100644 --- a/board/toradex/verdin-imx8mm/verdin-imx8mm.c +++ b/board/toradex/verdin-imx8mm/verdin-imx8mm.c @@ -9,6 +9,7 @@ #include <asm/io.h> #include <miiphy.h> #include <netdev.h> +#include <micrel.h> DECLARE_GLOBAL_DATA_PTR; @@ -37,14 +38,29 @@ static int setup_fec(void) int board_phy_config(struct phy_device *phydev) { - /* enable rgmii rxc skew and phy mode select to RGMII copper */ - phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f); - phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8); - - phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x00); - phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x82ee); - phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05); - phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100); + /* + * The PHY adds 1.2ns for the RXC and 0ns for TXC clock by + * default. The MAC and the layout don't add a skew between + * clock and data. + * Add 0.3ns for the RXC path and 0.96 + 0.42 ns (1.38 ns) for + * the TXC path to get the required clock skews. + */ + /* control data pad skew - devaddr = 0x02, register = 0x04 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0070); + /* rx data pad skew - devaddr = 0x02, register = 0x05 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x7777); + /* tx data pad skew - devaddr = 0x02, register = 0x06 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000); + /* gtx and rx clock pad skew - devaddr = 0x02, register = 0x08 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_CLOCK_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x03f4); if (phydev->drv->config) phydev->drv->config(phydev); |