diff --git a/soc/arm/quicklogic_eos_s3/soc.c b/soc/arm/quicklogic_eos_s3/soc.c
index 56f7323db9946df..821fee508458382 100644
--- a/soc/arm/quicklogic_eos_s3/soc.c
+++ b/soc/arm/quicklogic_eos_s3/soc.c
@@ -20,20 +20,6 @@ void eos_s3_lock_disable(void)
 	MISC_CTRL->LOCK_KEY_CTRL = 1;
 }
 
-int eos_s3_io_mux(uint32_t pad_nr, uint32_t pad_cfg)
-{
-	volatile uint32_t *p = (uint32_t *)IO_MUX_BASE;
-
-	if (pad_nr > EOS_S3_MAX_PAD_NR) {
-		return -EINVAL;
-	}
-
-	p += pad_nr;
-	*p = pad_cfg;
-
-	return 0;
-}
-
 static void eos_s3_cru_init(void)
 {
 	/* Set desired frequency */
diff --git a/soc/arm/quicklogic_eos_s3/soc.h b/soc/arm/quicklogic_eos_s3/soc.h
index b294be96e9bbabf..a82e5399248c882 100644
--- a/soc/arm/quicklogic_eos_s3/soc.h
+++ b/soc/arm/quicklogic_eos_s3/soc.h
@@ -46,11 +46,7 @@
 #define OSC_SET_FREQ_INC(FREQ)	(AIP->OSC_CTRL_1 = ((FREQ / 32768) - 3) & 0xFFF)
 #define OSC_GET_FREQ_INC()	(((AIP->OSC_CTRL_1 & 0xFFF) + 3) * 32768)
 
-#define EOS_S3_MAX_PAD_NR			45
-
 void eos_s3_lock_enable(void);
 void eos_s3_lock_disable(void);
 
-int eos_s3_io_mux(uint32_t pad_nr, uint32_t pad_cfg);
-
 #endif /* _SOC__H_ */