diff options
author | Max Krummenacher <max.krummenacher@toradex.com> | 2020-02-12 20:15:34 +0100 |
---|---|---|
committer | Max Krummenacher <max.krummenacher@toradex.com> | 2020-03-05 19:22:24 +0100 |
commit | b07ae5f3b4296985a57e26d77157e8e13989ddbe (patch) | |
tree | c6821155e090f605b1b5cd414c9aa5d2c6e8fec6 /board/toradex/verdin-imx8mm/verdin-imx8mm.c | |
parent | c24fe8441144d018d38f8a9392571581f07f66d6 (diff) |
verdin-imx8mm.c: set eth phy skew
Set the Ethernet PHY's RGMII skew registers according to the needed
skew.
Related-to: ELB-1970
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Diffstat (limited to 'board/toradex/verdin-imx8mm/verdin-imx8mm.c')
-rw-r--r-- | board/toradex/verdin-imx8mm/verdin-imx8mm.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/board/toradex/verdin-imx8mm/verdin-imx8mm.c b/board/toradex/verdin-imx8mm/verdin-imx8mm.c index e3c5774410..1edae1e545 100644 --- a/board/toradex/verdin-imx8mm/verdin-imx8mm.c +++ b/board/toradex/verdin-imx8mm/verdin-imx8mm.c @@ -19,6 +19,7 @@ #include <fsl_esdhc.h> #include <imx_mipi_dsi_bridge.h> #include <malloc.h> +#include <micrel.h> #include <miiphy.h> #include <mipi_dsi_panel.h> #include <mmc.h> @@ -99,16 +100,28 @@ static int setup_fec(void) int board_phy_config(struct phy_device *phydev) { - /* TODO: check settings for KSZ9030/31 */ - - /* 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); |