diff --git a/board/toradex/colibri_t30/colibri_t30.c b/board/toradex/colibri_t30/colibri_t30.c
index c5562f6d57..20cbb75a36 100644
--- a/board/toradex/colibri_t30/colibri_t30.c
+++ b/board/toradex/colibri_t30/colibri_t30.c
@@ -57,6 +57,17 @@ void pinmux_init(void)
 				   ARRAY_SIZE(colibri_t30_padctrl));
 }
 
+/*
+ * Disable RS232 serial transceiver ForceOFF# pins on Iris
+ */
+void gpio_early_init_uart(void)
+{
+	gpio_request(TEGRA_GPIO(X, 6), "Force OFF# X13");
+	gpio_direction_output(TEGRA_GPIO(X, 6), 1);
+	gpio_request(TEGRA_GPIO(X, 7), "Force OFF# X14");
+	gpio_direction_output(TEGRA_GPIO(X, 7), 1);
+}
+
 /*
  * Enable AX88772B USB to LAN controller
  */