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km/ls102xa: dbg phy prst depends on piggy presence 

The PHY for the debug interface was placed on the board for the
pg_wcom_ls102x. Hence only when a piggy is plugged, a RJ45 jack
including magnetics is connected to the MDI of the PHY. Without a
piggy the MDI lines are left floating and it does not make sense to
have an active debug PHY.
In case of expu1 an active PHY without a piggy even led to increased
jitter for syncE.

This patch only deactivates the prst line of the debug PHY when a piggy
is detected persent.

Signed-off-by: Rainer Boschung <rainer.boschung@hitachienergy.com>
Signed-off-by: Aleksandar Gerasimovski <aleksandar.gerasimovski@hitachienergy.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Aleksandar Gerasimovski 2021-11-16 12:51:47 +00:00 committed by Priyanka Jain
parent 639ca4b7f1
commit 70003e52f4
1 changed files with 3 additions and 1 deletions
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4
board/keymile/pg-wcom-ls102xa/pg-wcom-ls102xa.c
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@ -91,8 +91,10 @@ int board_early_init_f(void)
qrio_prstcfg(WCOM_CLIPS_RST, PRSTCFG_POWUP_UNIT_RST);
qrio_prst(WCOM_CLIPS_RST, false, false);
#endif
/* deasset debug phy reset only if piggy is present */
qrio_prstcfg(KM_DBG_ETH_RST, PRSTCFG_POWUP_UNIT_CORE_RST);
qrio_prst(KM_DBG_ETH_RST, false, false);
qrio_prst(KM_DBG_ETH_RST, !qrio_get_pgy_pres_pin(), false);
i2c_deblock_gpio_cfg();