diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 518db24a5b36..c7831407a882 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1380,7 +1380,7 @@ config SERIAL_IFX6X60
 
 config SERIAL_PCH_UART
 	tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) UART"
-	depends on PCI && (X86_32 || COMPILE_TEST)
+	depends on PCI && (X86_32 || MIPS ||  COMPILE_TEST)
 	select SERIAL_CORE
 	help
 	  This driver is for PCH(Platform controller Hub) UART of Intel EG20T
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index ea4ffc2ebb2f..23672f8a343e 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -31,6 +31,7 @@
 #include <linux/dmi.h>
 #include <linux/nmi.h>
 #include <linux/delay.h>
+#include <linux/of.h>
 
 #include <linux/debugfs.h>
 #include <linux/dmaengine.h>
@@ -1826,6 +1827,10 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
 	priv->trigger_level = 1;
 	priv->fcr = 0;
 
+	if (pdev->dev.of_node)
+		of_property_read_u32(pdev->dev.of_node, "clock-frequency"
+					 , &user_uartclk);
+
 #ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
 	pch_uart_ports[board->line_no] = priv;
 #endif