sunxi: makes an invisible option for H3-like DRAM controllers

Allwinner SoCs after H3 (e.g. A64, H5, R40, V3s) uses a H3-like
DesignWare DRAM controller, which do not have official free DRAM
initialization code, but can use modified dram_sun8i_h3.c.

Add a invisible option for easier DRAM initialization code reuse.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>

arch/arm/include/asm/arch-sunxi/dram.h

@@ -24,10 +24,8 @@
 #include <asm/arch/dram_sun8i_a33.h>
 #elif defined(CONFIG_MACH_SUN8I_A83T)
 #include <asm/arch/dram_sun8i_a83t.h>
-#elif defined(CONFIG_MACH_SUNXI_H3_H5) || \
-      defined(CONFIG_MACH_SUN8I_R40) || \
-      defined(CONFIG_MACH_SUN50I)
-#include <asm/arch/dram_sun8i_h3.h>
+#elif defined(CONFIG_SUNXI_DRAM_DW)
+#include <asm/arch/dram_sunxi_dw.h>
 #elif defined(CONFIG_MACH_SUN9I)
 #include <asm/arch/dram_sun9i.h>
 #else

arch/arm/mach-sunxi/Kconfig

@@ -29,11 +29,19 @@ config SUNXI_GEN_SUN6I
 	separate ahb reset control registers, custom pmic bus, new style
 	watchdog, etc.
 
+config SUNXI_DRAM_DW
+	bool
+	---help---
+	Select this for sunxi SoCs which uses a DRAM controller like the
+	DesignWare controller used in H3, mainly SoCs after H3, which do
+	not have official open-source DRAM initialization code, but can
+	use modified H3 DRAM initialization code.
 
 config MACH_SUNXI_H3_H5
 	bool
 	select DM_I2C
 	select SUNXI_DE2
+	select SUNXI_DRAM_DW
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
 
@@ -118,6 +126,7 @@ config MACH_SUN8I_R40
 	select ARCH_SUPPORT_PSCI
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
+	select SUNXI_DRAM_DW
 
 config MACH_SUN8I_V3S
 	bool "sun8i (Allwinner V3s)"
@@ -143,6 +152,7 @@ config MACH_SUN50I
 	select SUNXI_GEN_SUN6I
 	select SUNXI_HIGH_SRAM
 	select SUPPORT_SPL
+	select SUNXI_DRAM_DW
 	select FIT
 	select SPL_LOAD_FIT
 

arch/arm/mach-sunxi/Makefile

@@ -48,8 +48,6 @@ obj-$(CONFIG_MACH_SUN7I)	+= dram_sun4i.o
 obj-$(CONFIG_MACH_SUN8I_A23)	+= dram_sun8i_a23.o
 obj-$(CONFIG_MACH_SUN8I_A33)	+= dram_sun8i_a33.o
 obj-$(CONFIG_MACH_SUN8I_A83T)	+= dram_sun8i_a83t.o
-obj-$(CONFIG_MACH_SUNXI_H3_H5)	+= dram_sun8i_h3.o
-obj-$(CONFIG_MACH_SUN8I_R40)	+= dram_sun8i_h3.o
+obj-$(CONFIG_SUNXI_DRAM_DW)	+= dram_sunxi_dw.o
 obj-$(CONFIG_MACH_SUN9I)	+= dram_sun9i.o
-obj-$(CONFIG_MACH_SUN50I)	+= dram_sun8i_h3.o
 endif