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verdin-imx8mm: Change board phy skew values for our ksz9031

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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>
This commit is contained in:
Philippe Schenker 2020-03-11 11:59:24 +01:00 committed by Stefano Babic
parent c51eef5924
commit 22b56f428d
1 changed files with 24 additions and 8 deletions
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32
board/toradex/verdin-imx8mm/verdin-imx8mm.c
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@ -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);