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>

diff --git a/board/keymile/pg-wcom-ls102xa/pg-wcom-ls102xa.c b/board/keymile/pg-wcom-ls102xa/pg-wcom-ls102xa.c
index 2be2b64df5a61423e43eb9767df4d4ec4a532609..cff18dcd63e91641c794492a8fdc239a81dae366 100644 (file)
--- a/board/keymile/pg-wcom-ls102xa/pg-wcom-ls102xa.c
+++ b/board/keymile/pg-wcom-ls102xa/pg-wcom-ls102xa.c
@@ -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();