dm: core: Add Kconfig for simple bus driver

Add Kconfig entries for the simple-bus driver, both for U-Boot
and for SPL. The simple-bus is enabled by default in U-Boot and
disabled by default in SPL to preserve the original behavior.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Modified to fit on top of Masahiro's $(SPL) setup:
Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/core/Kconfig

@@ -105,4 +105,19 @@ config DEBUG_DEVRES
 
 	  If you are unsure about this, Say N here.
 
+config SIMPLE_BUS
+	bool "Support simple-bus driver"
+	depends on DM && OF_CONTROL
+	default y
+	help
+	  Supports the 'simple-bus' driver, which is used on some systems.
+
+config SPL_SIMPLE_BUS
+	bool "Support simple-bus driver in SPL"
+	depends on SPL_DM && SPL_OF_CONTROL
+	default n
+	help
+	  Supports the 'simple-bus' driver, which is used on some systems
+	  in SPL.
+
 endmenu

drivers/core/Makefile

@@ -6,10 +6,8 @@
 
 obj-y	+= device.o lists.o root.o uclass.o util.o
 obj-$(CONFIG_DEVRES) += devres.o
-ifndef CONFIG_SPL_BUILD
-obj-$(CONFIG_$(SPL_)OF_CONTROL) += simple-bus.o
-endif
 obj-$(CONFIG_$(SPL_)DM_DEVICE_REMOVE)	+= device-remove.o
+obj-$(CONFIG_$(SPL_)SIMPLE_BUS)	+= simple-bus.o
 obj-$(CONFIG_DM)	+= dump.o
 obj-$(CONFIG_REGMAP)	+= regmap.o
 obj-$(CONFIG_SYSCON)	+= syscon-uclass.o

drivers/core/device.c

@@ -574,11 +574,9 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
 	fdt_addr_t addr;
 
 	addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
-	if (addr != FDT_ADDR_T_NONE) {
-#ifndef CONFIG_SPL_BUILD
+	if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
 		if (device_get_uclass_id(dev->parent) == UCLASS_SIMPLE_BUS)
 			addr = simple_bus_translate(dev->parent, addr);
-#endif
 	}
 
 	return addr;