net: eqos: disable tristate logic for MODS

Bug 1814532

Change-Id: Ie82cb5e846d7e8a827f3bb4ba071a8f46ac9f7d9
Signed-off-by: Narayan Reddy <narayanr@nvidia.com>
Reviewed-on: http://git-master/r/1230100
Reviewed-on: http://git-master/r/1229996
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

3 files changed, 28 insertions, 9 deletions

diff --git a/drivers/net/ethernet/nvidia/eqos/Kconfig.t18x b/drivers/net/ethernet/nvidia/eqos/Kconfig.t18x
index a8da5e13a..4fd60b15e 100644
--- a/drivers/net/ethernet/nvidia/eqos/Kconfig.t18x
+++ b/drivers/net/ethernet/nvidia/eqos/Kconfig.t18x
@@ -29,11 +29,22 @@ config DISABLE_VLAN_FWD_TO_REAL_IF
         default n
 
         ---help---
-                This disables support to forward VLAN tagged packets to the
-                Real interface. If enabled, VLAN tagged packets are only forwarded
-                to the Virtual interface.
+          This disables support to forward VLAN tagged packets to the
+          Real interface. If enabled, VLAN tagged packets are only forwarded
+          to the Virtual interface.
 
-                If unsure, say n.
+          If unsure, say n.
+
+config DISABLE_EQOS_CTRL_TRISTATE
+        bool "tristate tx signal when cable removed "
+        depends on EQOS
+        default n
+
+        ---help---
+          This disables the logic to make sure that tx signal is tristated
+          when cable is not attached.
+
+          If unsure, say n.
 
 config DEBUGFS_OBJ
         bool "Enable DEBUGFS_OBJ"
diff --git a/drivers/net/ethernet/nvidia/eqos/Makefile.t18x b/drivers/net/ethernet/nvidia/eqos/Makefile.t18x
index 0207e0a8f..a954463fb 100644
--- a/drivers/net/ethernet/nvidia/eqos/Makefile.t18x
+++ b/drivers/net/ethernet/nvidia/eqos/Makefile.t18x
@@ -17,6 +17,11 @@ ccflags-y += -DHWA_FPGA_ONLY
 ## default build settings.
 ccflags-y += -DCONFIG_PTPSUPPORT_OBJ
 
+## enable this only for MODS verification
+ifeq ($(CONFIG_DISABLE_EQOS_CTRL_TRISTATE),y)
+ccflags-y  += -DDISABLE_TRISTATE
+endif
+
 obj-$(CONFIG_EQOS)  += eqos.o
 
 eqos-y += dev.o
diff --git a/drivers/net/ethernet/nvidia/eqos/init.c b/drivers/net/ethernet/nvidia/eqos/init.c
index 4a6675ec1..a905c661e 100644
--- a/drivers/net/ethernet/nvidia/eqos/init.c
+++ b/drivers/net/ethernet/nvidia/eqos/init.c
@@ -885,12 +885,13 @@ int eqos_probe(struct platform_device *pdev)
         }
         DBGPR("phyirq = %d\n", phyirq);
 
+#ifndef DISABLE_TRISTATE
         pdata->prod_list = devm_tegra_prod_get(&pdev->dev);
         if (IS_ERR(pdata->prod_list)) {
                 dev_info(&pdev->dev, "No prod values found\n");
                 pdata->prod_list = NULL;
         }
-
+#endif
         /* calibrate pad */
         ret = hw_if->pad_calibrate(pdata);
         if (ret < 0)
@@ -964,10 +965,12 @@ int eqos_probe(struct platform_device *pdev)
                 dev_err(pdata->dev, "Failed to map PAD registers\n");
                 return -EADDRNOTAVAIL;
         }
-        if (tegra_prod_set_by_name(&pdata->pads, "tx_tristate_enable",
-                                                pdata->prod_list)) {
-                dev_info(&pdata->pdev->dev,
-                                "failed to enable pad prod settings\n");
+        if (pdata->prod_list) {
+                if (tegra_prod_set_by_name(&pdata->pads, "tx_tristate_enable",
+                                                        pdata->prod_list)) {
+                        dev_info(&pdata->pdev->dev,
+                                        "failed to enable pad prod settings\n");
+                }
         }
         pdata->num_chans = num_chans;
         pdata->rx_buffer_len = EQOS_RX_BUF_LEN;