diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 69ccb69e8f..88056a1da5 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -59,6 +59,7 @@ jobs:
          - {RTT_BSP: "lpc54114-lite", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "ls1bdev", RTT_TOOL_CHAIN: "sourcery-mips"}
          - {RTT_BSP: "ls1cdev", RTT_TOOL_CHAIN: "sourcery-mips"}
+         - {RTT_BSP: "ls2kdev", RTT_TOOL_CHAIN: "sourcery-mips"}
          - {RTT_BSP: "mb9bf500r", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "mb9bf506r", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "mb9bf618s", RTT_TOOL_CHAIN: "sourcery-arm"}
diff --git a/bsp/ls2kdev/.config b/bsp/ls2kdev/.config
index 133b7dca3a..3612f7af53 100644
--- a/bsp/ls2kdev/.config
+++ b/bsp/ls2kdev/.config
@@ -415,6 +415,7 @@ CONFIG_RT_LWIP_USING_PING=y
 # CONFIG_PKG_USING_AGILE_FTP is not set
 # CONFIG_PKG_USING_EMBEDDEDPROTO is not set
 # CONFIG_PKG_USING_RT_LINK_HW is not set
+# CONFIG_PKG_USING_HM is not set
 
 #
 # security packages
@@ -688,4 +689,4 @@ CONFIG_RT_LWIP_USING_PING=y
 CONFIG_SOC_LS=y
 CONFIG_SOC_LS2K1000=y
 CONFIG_RT_USING_UART0=y
-CONFIG_RT_USING_UART4=y
+# CONFIG_RT_USING_UART4 is not set
diff --git a/bsp/ls2kdev/drivers/drv_spi.c b/bsp/ls2kdev/drivers/drv_spi.c
index 5a42acbee8..e118f48039 100644
--- a/bsp/ls2kdev/drivers/drv_spi.c
+++ b/bsp/ls2kdev/drivers/drv_spi.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -8,13 +8,15 @@
  * 2020-10-28     0xcccccccccccc           Initial Version
  * 2021-01-17     0xcccccccccccc           Bug Fixed : clock division cannot been adjusted as expected due to wrong register configuration.
  */
+
 /**
  * @addtogroup ls2k
  */
 /*@{*/
-#include <stdio.h>
+
 #include <stdlib.h>
 #include <ctype.h>
+#include <stdint.h>
 #include <rtthread.h>
 #include <drivers/spi.h>
 #include "drv_spi.h"
@@ -22,15 +24,15 @@
 #ifdef RT_USING_SPI
 static void spi_init(uint8_t spre_spr, uint8_t copl, uint8_t cpha)
 {
-    SET_SPI(SPSR, 0xc0); 
+    SET_SPI(SPSR, 0xc0);
     SET_SPI(PARAM, 0x40);
     SET_SPI(PARAM2, 0x01);
     SET_SPI(SPER, (spre_spr & 0b00001100) >> 2);
-    SET_SPI(SPCR, 0x50 | copl << 3 | cpha << 2 | (spre_spr & 0b00000011)); 
+    SET_SPI(SPCR, 0x50 | copl << 3 | cpha << 2 | (spre_spr & 0b00000011));
     SET_SPI(SOFTCS, 0xff);
 }
 
-static void spi_set_csn(uint8_t val) 
+static void spi_set_csn(uint8_t val)
 {
     SET_SPI(SOFTCS, val);
 }
@@ -38,7 +40,7 @@ static void spi_set_csn(uint8_t val)
 #ifdef RT_USING_SPI_GPIOCS
     #include <drivers/pin.h>
 #endif
-static void spi_set_cs(unsigned char cs, int new_status) 
+static void spi_set_cs(unsigned char cs, int new_status)
 {
     if (cs < 4)
     {
diff --git a/bsp/ls2kdev/drivers/drv_spi.h b/bsp/ls2kdev/drivers/drv_spi.h
index 0b254d4fc2..447e65d91b 100644
--- a/bsp/ls2kdev/drivers/drv_spi.h
+++ b/bsp/ls2kdev/drivers/drv_spi.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -14,12 +14,9 @@
 #ifndef LS2K_DRV_SPI_H
 #define LS2K_DRV_SPI_H
 
-#include <rtthread.h>
-#include <rthw.h>
-
 // kseg1 byte operation
-#define KSEG1_STORE8(addr,val)	 *(volatile char *)(0xffffffffa0000000 | addr) = val
-#define KSEG1_LOAD8(addr)	 *(volatile char *)(0xffffffffa0000000 | addr) 
+#define KSEG1_STORE8(addr,val)   *(volatile char *)(0xffffffffa0000000 | addr) = val
+#define KSEG1_LOAD8(addr)    *(volatile char *)(0xffffffffa0000000 | addr)
 // clock configurations
 #define APB_MAX_SPEED 125000000U
 #define APB_FREQSCALE (((KSEG1_LOAD8(0xffffffffbfe104d2)>>4)&0x7)+1)
@@ -30,7 +27,7 @@
 // bit bias
 #define SPCR      0x0
 #define SPSR      0x1
-#define FIFO	  0x2
+#define FIFO      0x2
 #define TXFIFO    0x2
 #define RXFIFO    0x2
 #define SPER      0x3
diff --git a/bsp/ls2kdev/rtconfig.h b/bsp/ls2kdev/rtconfig.h
index 90dcf2ad91..12d44a992c 100644
--- a/bsp/ls2kdev/rtconfig.h
+++ b/bsp/ls2kdev/rtconfig.h
@@ -253,6 +253,5 @@
 #define SOC_LS
 #define SOC_LS2K1000
 #define RT_USING_UART0
-#define RT_USING_UART4
 
 #endif
diff --git a/libcpu/mips/gs264/mmu.c b/libcpu/mips/gs264/mmu.c
index cab73f37bd..2ba6d92106 100644
--- a/libcpu/mips/gs264/mmu.c
+++ b/libcpu/mips/gs264/mmu.c
@@ -12,6 +12,7 @@
 #include <rtthread.h>
 #include <rthw.h>
 #include <board.h>
+#include <stddef.h>
 
 #include "cache.h"
 #include "mips_mmu.h"