diff --git a/drivers/pinctrl/renesas/core.c b/drivers/pinctrl/renesas/core.c
index c252eb5c9755..2950177459bc 100644
--- a/drivers/pinctrl/renesas/core.c
+++ b/drivers/pinctrl/renesas/core.c
@@ -741,7 +741,7 @@ static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; }
 
 #ifdef DEBUG
 #define SH_PFC_MAX_REGS		300
-#define SH_PFC_MAX_ENUMS	3000
+#define SH_PFC_MAX_ENUMS	5000
 
 static unsigned int sh_pfc_errors __initdata;
 static unsigned int sh_pfc_warnings __initdata;
@@ -875,7 +875,8 @@ static void __init sh_pfc_check_cfg_reg(const char *drvname,
 			 GENMASK(cfg_reg->reg_width - 1, 0));
 
 	if (cfg_reg->field_width) {
-		n = cfg_reg->reg_width / cfg_reg->field_width;
+		fw = cfg_reg->field_width;
+		n = (cfg_reg->reg_width / fw) << fw;
 		/* Skip field checks (done at build time) */
 		goto check_enum_ids;
 	}