diff --git a/src/drivers/rtmouse.c b/src/drivers/rtmouse.c
index 12ab069..53983e0 100644
--- a/src/drivers/rtmouse.c
+++ b/src/drivers/rtmouse.c
@@ -3,9 +3,9 @@
  * rtmouse.c
  * Raspberry Pi Mouse device driver
  *
- * Version: 3.0.0
+ * Version: 3.1.0
  *
- * Copyright (C) 2015-2020 RT Corporation <shop@rt-net.jp>
+ * Copyright (C) 2015-2021 RT Corporation <shop@rt-net.jp>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -751,6 +751,7 @@ static int gpio_map(void)
 {
 	static int clk_status = 1;
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(5, 0, 0)
 	if (gpio_base == NULL) {
 		gpio_base = ioremap_nocache(RPI_GPIO_BASE, RPI_GPIO_SIZE);
 	}
@@ -762,6 +763,19 @@ static int gpio_map(void)
 	if (clk_base == NULL) {
 		clk_base = ioremap_nocache(RPI_CLK_BASE, RPI_CLK_SIZE);
 	}
+#else
+	if (gpio_base == NULL) {
+		gpio_base = ioremap(RPI_GPIO_BASE, RPI_GPIO_SIZE);
+	}
+
+	if (pwm_base == NULL) {
+		pwm_base = ioremap(RPI_PWM_BASE, RPI_PWM_SIZE);
+	}
+
+	if (clk_base == NULL) {
+		clk_base = ioremap(RPI_CLK_BASE, RPI_CLK_SIZE);
+	}
+#endif
 
 	/* kill */
 	if (clk_status == 1) {
@@ -2058,6 +2072,7 @@ static int i2c_counter_init(void)
 	 * 動的にデバイス実体を作成
 	 * (https://www.kernel.org/doc/Documentation/i2c/instantiating-devices)
 	 */
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(5, 0, 0)
 	// printk(KERN_DEBUG "%s: adding i2c device", __func__);
 	i2c_adap_l = i2c_get_adapter(1);
 	i2c_client_l = i2c_new_device(i2c_adap_l, &i2c_board_info_l);
@@ -2069,7 +2084,19 @@ static int i2c_counter_init(void)
 	i2c_client_r = i2c_new_device(i2c_adap_r, &i2c_board_info_r);
 	i2c_put_adapter(i2c_adap_r);
 	// printk(KERN_DEBUG "%s: added i2c device rtcntr", __func__);
+#else
+	// printk(KERN_DEBUG "%s: adding i2c device", __func__);
+	i2c_adap_l = i2c_get_adapter(1);
+	i2c_client_l = i2c_new_client_device(i2c_adap_l, &i2c_board_info_l);
+	i2c_put_adapter(i2c_adap_l);
+	// printk(KERN_DEBUG "%s: added i2c device rtcntl", __func__);
 
+	// printk(KERN_DEBUG "%s: adding i2c device", __func__);
+	i2c_adap_r = i2c_get_adapter(1);
+	i2c_client_r = i2c_new_client_device(i2c_adap_r, &i2c_board_info_r);
+	i2c_put_adapter(i2c_adap_r);
+// printk(KERN_DEBUG "%s: added i2c device rtcntr", __func__);
+#endif
 
 	return retval;
 }