--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -3,20 +3,23 @@
 # subsystems should select the appropriate symbols.
 
 config REGMAP
-	default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_MMIO || REGMAP_IRQ)
 	select LZO_COMPRESS
 	select LZO_DECOMPRESS
 	select IRQ_DOMAIN if REGMAP_IRQ
-	bool
+	tristate
 
 config REGMAP_I2C
+	select REGMAP
 	tristate
 
 config REGMAP_SPI
+	select REGMAP
 	tristate
 
 config REGMAP_MMIO
+	select REGMAP
 	tristate
 
 config REGMAP_IRQ
+	select REGMAP
 	bool
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -43,7 +43,7 @@ struct reg_default {
 	unsigned int def;
 };
 
-#ifdef CONFIG_REGMAP
+#if IS_ENABLED(CONFIG_REGMAP)
 
 enum regmap_endian {
 	/* Unspecified -> 0 -> Backwards compatible default */