diff --git a/src/superio/fintek/f71808a/superio.c b/src/superio/fintek/f71808a/superio.c
index 200b21edf2..05132cc0ea 100644
--- a/src/superio/fintek/f71808a/superio.c
+++ b/src/superio/fintek/f71808a/superio.c
@@ -18,7 +18,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
 
 #include "f71808a.h"
diff --git a/src/superio/fintek/f71859/superio.c b/src/superio/fintek/f71859/superio.c
index da998d0197..2cd1bb1d81 100644
--- a/src/superio/fintek/f71859/superio.c
+++ b/src/superio/fintek/f71859/superio.c
@@ -18,7 +18,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include "f71859.h"
 
 static void f71859_init(struct device *dev)
diff --git a/src/superio/fintek/f71863fg/superio.c b/src/superio/fintek/f71863fg/superio.c
index a5cd632e49..5a33a716cd 100644
--- a/src/superio/fintek/f71863fg/superio.c
+++ b/src/superio/fintek/f71863fg/superio.c
@@ -17,8 +17,8 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
+
 #include "f71863fg.h"
 
 static void f71863fg_init(struct device *dev)
diff --git a/src/superio/fintek/f71869ad/superio.c b/src/superio/fintek/f71869ad/superio.c
index 15fdf3ef22..67b39ef066 100644
--- a/src/superio/fintek/f71869ad/superio.c
+++ b/src/superio/fintek/f71869ad/superio.c
@@ -17,7 +17,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
 
 #include "fintek_internal.h"
diff --git a/src/superio/fintek/f81216h/superio.c b/src/superio/fintek/f81216h/superio.c
index e55ec5776b..106ab0ea42 100644
--- a/src/superio/fintek/f81216h/superio.c
+++ b/src/superio/fintek/f81216h/superio.c
@@ -19,7 +19,6 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <console/console.h>
-#include <stdlib.h>
 
 #include "chip.h"
 #include "f81216h.h"
diff --git a/src/superio/fintek/f81865f/superio.c b/src/superio/fintek/f81865f/superio.c
index b6156ee8c3..d62fc82793 100644
--- a/src/superio/fintek/f81865f/superio.c
+++ b/src/superio/fintek/f81865f/superio.c
@@ -17,8 +17,8 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
+
 #include "f81865f.h"
 
 static void f81865f_init(struct device *dev)
diff --git a/src/superio/fintek/f81866d/superio.c b/src/superio/fintek/f81866d/superio.c
index 53a5aacb8d..c66bf27745 100644
--- a/src/superio/fintek/f81866d/superio.c
+++ b/src/superio/fintek/f81866d/superio.c
@@ -19,8 +19,8 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
+
 #include "f81866d.h"
 #include "fintek_internal.h"
 
diff --git a/src/superio/ite/common/env_ctrl.c b/src/superio/ite/common/env_ctrl.c
index bee0a509aa..9d7594fc42 100644
--- a/src/superio/ite/common/env_ctrl.c
+++ b/src/superio/ite/common/env_ctrl.c
@@ -17,9 +17,9 @@
  * GNU General Public License for more details.
  */
 
-#include <stdlib.h>
 #include <console/console.h>
 #include <delay.h>
+#include <stddef.h>
 #include <superio/hwm5_conf.h>
 
 #include "env_ctrl.h"
diff --git a/src/superio/ite/it8528e/superio.c b/src/superio/ite/it8528e/superio.c
index 1ed8fe0cb5..d7169e6d4e 100644
--- a/src/superio/ite/it8528e/superio.c
+++ b/src/superio/ite/it8528e/superio.c
@@ -19,7 +19,6 @@
 
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 
 #include "it8528e.h"
diff --git a/src/superio/ite/it8623e/superio.c b/src/superio/ite/it8623e/superio.c
index 5fdfceff41..044883267f 100644
--- a/src/superio/ite/it8623e/superio.c
+++ b/src/superio/ite/it8623e/superio.c
@@ -19,7 +19,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 #include <superio/ite/common/env_ctrl.h>
 
diff --git a/src/superio/ite/it8712f/superio.c b/src/superio/ite/it8712f/superio.c
index 6f096b09aa..2004236396 100644
--- a/src/superio/ite/it8712f/superio.c
+++ b/src/superio/ite/it8712f/superio.c
@@ -18,7 +18,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 
 #include "it8712f.h"
diff --git a/src/superio/ite/it8718f/superio.c b/src/superio/ite/it8718f/superio.c
index ed15955426..297aead5fb 100644
--- a/src/superio/ite/it8718f/superio.c
+++ b/src/superio/ite/it8718f/superio.c
@@ -17,7 +17,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/ite/common/env_ctrl.h>
 #include <superio/conf_mode.h>
 
diff --git a/src/superio/ite/it8721f/superio.c b/src/superio/ite/it8721f/superio.c
index cf3ca3f99f..5426992ce2 100644
--- a/src/superio/ite/it8721f/superio.c
+++ b/src/superio/ite/it8721f/superio.c
@@ -18,8 +18,8 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
+
 #include "it8721f.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/ite/it8728f/superio.c b/src/superio/ite/it8728f/superio.c
index 7107bb4e4a..58a837ea8f 100644
--- a/src/superio/ite/it8728f/superio.c
+++ b/src/superio/ite/it8728f/superio.c
@@ -18,7 +18,6 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/ite/common/env_ctrl.h>
 
 #include "chip.h"
diff --git a/src/superio/ite/it8772f/superio.c b/src/superio/ite/it8772f/superio.c
index 4d9ea7134f..bf6726412d 100644
--- a/src/superio/ite/it8772f/superio.c
+++ b/src/superio/ite/it8772f/superio.c
@@ -20,7 +20,6 @@
 #include <pc80/keyboard.h>
 #include <arch/io.h>
 #include <delay.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 #include <superio/hwm5_conf.h>
 
diff --git a/src/superio/nsc/pc87382/superio.c b/src/superio/nsc/pc87382/superio.c
index 7c04023670..c90ebd9b83 100644
--- a/src/superio/nsc/pc87382/superio.c
+++ b/src/superio/nsc/pc87382/superio.c
@@ -16,7 +16,7 @@
 
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
+
 #include "pc87382.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/nsc/pc87384/superio.c b/src/superio/nsc/pc87384/superio.c
index cef7ff7ee0..87dd265182 100644
--- a/src/superio/nsc/pc87384/superio.c
+++ b/src/superio/nsc/pc87384/superio.c
@@ -16,7 +16,7 @@
 
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
+
 #include "pc87384.h"
 
 static struct device_operations ops = {
diff --git a/src/superio/nsc/pc87392/superio.c b/src/superio/nsc/pc87392/superio.c
index a15d0a2aad..4a5bed29af 100644
--- a/src/superio/nsc/pc87392/superio.c
+++ b/src/superio/nsc/pc87392/superio.c
@@ -16,7 +16,7 @@
 
 #include <device/device.h>
 #include <device/pnp.h>
-#include <stdlib.h>
+
 #include "pc87392.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/nsc/pc87417/superio.c b/src/superio/nsc/pc87417/superio.c
index f867ff3e62..f98ba843ad 100644
--- a/src/superio/nsc/pc87417/superio.c
+++ b/src/superio/nsc/pc87417/superio.c
@@ -19,7 +19,7 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "pc87417.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/nuvoton/nct5104d/superio.c b/src/superio/nuvoton/nct5104d/superio.c
index 40d1200336..493e0cef57 100644
--- a/src/superio/nuvoton/nct5104d/superio.c
+++ b/src/superio/nuvoton/nct5104d/superio.c
@@ -16,7 +16,7 @@
 
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
+
 #include "nct5104d.h"
 #include "chip.h"
 
diff --git a/src/superio/nuvoton/nct5572d/superio.c b/src/superio/nuvoton/nct5572d/superio.c
index e8249d4e69..30846872a0 100644
--- a/src/superio/nuvoton/nct5572d/superio.c
+++ b/src/superio/nuvoton/nct5572d/superio.c
@@ -21,7 +21,6 @@
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
 #include <pc80/mc146818rtc.h>
-#include <stdlib.h>
 #include <arch/acpi.h>
 #include <superio/conf_mode.h>
 
diff --git a/src/superio/nuvoton/nct6776/superio.c b/src/superio/nuvoton/nct6776/superio.c
index e399c0a703..78e07b66d6 100644
--- a/src/superio/nuvoton/nct6776/superio.c
+++ b/src/superio/nuvoton/nct6776/superio.c
@@ -19,7 +19,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 
 #include "nct6776.h"
diff --git a/src/superio/nuvoton/nct6779d/superio.c b/src/superio/nuvoton/nct6779d/superio.c
index 49e630635e..7ef3488b8c 100644
--- a/src/superio/nuvoton/nct6779d/superio.c
+++ b/src/superio/nuvoton/nct6779d/superio.c
@@ -20,7 +20,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 
 #include "nct6779d.h"
diff --git a/src/superio/nuvoton/nct6791d/superio.c b/src/superio/nuvoton/nct6791d/superio.c
index 3a6d74043f..23d5a6f824 100644
--- a/src/superio/nuvoton/nct6791d/superio.c
+++ b/src/superio/nuvoton/nct6791d/superio.c
@@ -21,7 +21,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 
 #include "nct6791d.h"
diff --git a/src/superio/nuvoton/npcd378/superio.c b/src/superio/nuvoton/npcd378/superio.c
index c1f557ebed..f11e75a550 100644
--- a/src/superio/nuvoton/npcd378/superio.c
+++ b/src/superio/nuvoton/npcd378/superio.c
@@ -23,7 +23,6 @@
 #include <device/pnp.h>
 #include <option.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 #include <superio/conf_mode.h>
 #include <arch/acpi.h>
 #include <arch/acpigen.h>
diff --git a/src/superio/nuvoton/wpcm450/superio.c b/src/superio/nuvoton/wpcm450/superio.c
index c666818530..aeb394acca 100644
--- a/src/superio/nuvoton/wpcm450/superio.c
+++ b/src/superio/nuvoton/wpcm450/superio.c
@@ -17,7 +17,7 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "wpcm450.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/renesas/m3885x/superio.c b/src/superio/renesas/m3885x/superio.c
index 79d300bb97..4bc590f79c 100644
--- a/src/superio/renesas/m3885x/superio.c
+++ b/src/superio/renesas/m3885x/superio.c
@@ -16,7 +16,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <console/console.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
 
 void m3885_configure_multikey(void);
diff --git a/src/superio/smsc/fdc37n972/superio.c b/src/superio/smsc/fdc37n972/superio.c
index 0ee9850c2e..3706dec762 100644
--- a/src/superio/smsc/fdc37n972/superio.c
+++ b/src/superio/smsc/fdc37n972/superio.c
@@ -17,7 +17,6 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 
 #include "fdc37n972.h"
 
diff --git a/src/superio/smsc/kbc1100/superio.c b/src/superio/smsc/kbc1100/superio.c
index cd621a4213..9de88e2733 100644
--- a/src/superio/smsc/kbc1100/superio.c
+++ b/src/superio/smsc/kbc1100/superio.c
@@ -19,7 +19,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "kbc1100.h"
 
 /* Forward declarations */
diff --git a/src/superio/smsc/lpc47m10x/superio.c b/src/superio/smsc/lpc47m10x/superio.c
index 0cf8324c2c..a4e3799cd8 100644
--- a/src/superio/smsc/lpc47m10x/superio.c
+++ b/src/superio/smsc/lpc47m10x/superio.c
@@ -22,7 +22,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "lpc47m10x.h"
 
 /**
diff --git a/src/superio/smsc/lpc47m15x/superio.c b/src/superio/smsc/lpc47m15x/superio.c
index 7b7623f785..40eb7d25b1 100644
--- a/src/superio/smsc/lpc47m15x/superio.c
+++ b/src/superio/smsc/lpc47m15x/superio.c
@@ -19,7 +19,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "lpc47m15x.h"
 
 /* Forward declarations */
diff --git a/src/superio/smsc/lpc47n207/early_serial.c b/src/superio/smsc/lpc47n207/early_serial.c
index b8e5c0b549..9bda334b84 100644
--- a/src/superio/smsc/lpc47n207/early_serial.c
+++ b/src/superio/smsc/lpc47n207/early_serial.c
@@ -16,7 +16,7 @@
 #include <arch/io.h>
 #include <device/pnp.h>
 #include <stdint.h>
-#include <stdlib.h>
+
 #include "lpc47n207.h"
 
 /*
diff --git a/src/superio/smsc/lpc47n217/superio.c b/src/superio/smsc/lpc47n217/superio.c
index fe188af5b3..1b34bec27c 100644
--- a/src/superio/smsc/lpc47n217/superio.c
+++ b/src/superio/smsc/lpc47n217/superio.c
@@ -24,7 +24,7 @@
 #include <device/pnp.h>
 #include <console/console.h>
 #include <assert.h>
-#include <stdlib.h>
+
 #include "lpc47n217.h"
 
 /* Forward declarations */
diff --git a/src/superio/smsc/lpc47n227/superio.c b/src/superio/smsc/lpc47n227/superio.c
index 6fcf8e4371..57297aba5b 100644
--- a/src/superio/smsc/lpc47n227/superio.c
+++ b/src/superio/smsc/lpc47n227/superio.c
@@ -20,7 +20,6 @@
 #include <device/pnp.h>
 #include <console/console.h>
 #include <assert.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
 #include <superio/conf_mode.h>
 
diff --git a/src/superio/smsc/mec1308/superio.c b/src/superio/smsc/mec1308/superio.c
index 2cd9bd3835..106b8ad500 100644
--- a/src/superio/smsc/mec1308/superio.c
+++ b/src/superio/smsc/mec1308/superio.c
@@ -19,7 +19,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "mec1308.h"
 
 static void mec1308_init(struct device *dev)
diff --git a/src/superio/smsc/sio1036/superio.c b/src/superio/smsc/sio1036/superio.c
index dc8a5515a5..c39d0970c6 100644
--- a/src/superio/smsc/sio1036/superio.c
+++ b/src/superio/smsc/sio1036/superio.c
@@ -18,7 +18,6 @@
 #include <device/device.h>
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
-#include <stdlib.h>
 
 #include "sio1036.h"
 
diff --git a/src/superio/smsc/sio10n268/superio.c b/src/superio/smsc/sio10n268/superio.c
index b8243ece51..cf432a09b8 100644
--- a/src/superio/smsc/sio10n268/superio.c
+++ b/src/superio/smsc/sio10n268/superio.c
@@ -13,10 +13,10 @@
  * GNU General Public License for more details.
  */
 
-#include <stdlib.h>
 #include <device/device.h>
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
+
 #include "sio10n268.h"
 
 static void init(struct device *dev)
diff --git a/src/superio/smsc/smscsuperio/superio.c b/src/superio/smsc/smscsuperio/superio.c
index 4ce006dc34..aa5af38250 100644
--- a/src/superio/smsc/smscsuperio/superio.c
+++ b/src/superio/smsc/smscsuperio/superio.c
@@ -35,7 +35,6 @@
 #include <superio/conf_mode.h>
 #include <console/console.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
 
 /* The following Super I/O chips are currently supported by this driver: */
 #define LPC47M172	0x14
diff --git a/src/superio/winbond/w83627dhg/superio.c b/src/superio/winbond/w83627dhg/superio.c
index 9e15037277..bd9900ba14 100644
--- a/src/superio/winbond/w83627dhg/superio.c
+++ b/src/superio/winbond/w83627dhg/superio.c
@@ -17,7 +17,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "w83627dhg.h"
 
 static void w83627dhg_enable_UR2(struct device *dev)
diff --git a/src/superio/winbond/w83627ehg/superio.c b/src/superio/winbond/w83627ehg/superio.c
index 85e3250d92..da501739f6 100644
--- a/src/superio/winbond/w83627ehg/superio.c
+++ b/src/superio/winbond/w83627ehg/superio.c
@@ -24,7 +24,7 @@
 #include <console/console.h>
 #include <pc80/keyboard.h>
 #include <pc80/mc146818rtc.h>
-#include <stdlib.h>
+
 #include "w83627ehg.h"
 
 static void enable_hwm_smbus(struct device *dev)
diff --git a/src/superio/winbond/w83627hf/superio.c b/src/superio/winbond/w83627hf/superio.c
index 54120fbe0b..a4d734fa47 100644
--- a/src/superio/winbond/w83627hf/superio.c
+++ b/src/superio/winbond/w83627hf/superio.c
@@ -24,7 +24,7 @@
 #include <console/console.h>
 #include <pc80/keyboard.h>
 #include <pc80/mc146818rtc.h>
-#include <stdlib.h>
+
 #include "w83627hf.h"
 
 static void enable_hwm_smbus(struct device *dev)
diff --git a/src/superio/winbond/w83627uhg/superio.c b/src/superio/winbond/w83627uhg/superio.c
index 82974ba056..e78374076e 100644
--- a/src/superio/winbond/w83627uhg/superio.c
+++ b/src/superio/winbond/w83627uhg/superio.c
@@ -18,8 +18,8 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <stdint.h>
-#include <stdlib.h>
 #include <pc80/keyboard.h>
+
 #include "w83627uhg.h"
 
 /*
diff --git a/src/superio/winbond/w83667hg-a/superio.c b/src/superio/winbond/w83667hg-a/superio.c
index 0735f045ad..4a995d6b5d 100644
--- a/src/superio/winbond/w83667hg-a/superio.c
+++ b/src/superio/winbond/w83667hg-a/superio.c
@@ -21,7 +21,6 @@
 #include <device/pnp.h>
 #include <pc80/keyboard.h>
 #include <pc80/mc146818rtc.h>
-#include <stdlib.h>
 #include <arch/acpi.h>
 #include <superio/conf_mode.h>
 
diff --git a/src/superio/winbond/w83977tf/superio.c b/src/superio/winbond/w83977tf/superio.c
index b4f316ba75..b11e5be577 100644
--- a/src/superio/winbond/w83977tf/superio.c
+++ b/src/superio/winbond/w83977tf/superio.c
@@ -20,7 +20,7 @@
 #include <device/pnp.h>
 #include <superio/conf_mode.h>
 #include <pc80/keyboard.h>
-#include <stdlib.h>
+
 #include "w83977tf.h"
 
 static void w83977tf_init(struct device *dev)