rockchip: Enable building a SPI ROM image on jerry

Add a simple binman config and enable CONFIG_HAS_ROM so that U-Boot
produces a ROM for jerry.

Change the binman image definition to support multiple images, since it
may be used to build both u-boot-rockchip.bin and u-boot.rom
Signed-off-by: NSimon Glass <sjg@chromium.org>

arch/arm/dts/rk3288-u-boot.dtsi

@@ -12,6 +12,30 @@
 	};
 };
 
+#ifdef CONFIG_ROCKCHIP_SPI_IMAGE
+&binman {
+	rom {
+		filename = "u-boot.rom";
+		size = <0x400000>;
+		pad-byte = <0xff>;
+
+		mkimage {
+			args = "-n rk3288 -T rkspi";
+			u-boot-spl {
+			};
+		};
+		u-boot-img {
+			offset = <0x20000>;
+		};
+		u-boot {
+			offset = <0x300000>;
+		};
+		fdtmap {
+		};
+	};
+};
+#endif
+
 &dmc {
 	u-boot,dm-pre-reloc;
 };

arch/arm/dts/rockchip-u-boot.dtsi

@@ -6,7 +6,13 @@
 #include <config.h>
 
 / {
-	binman {
+	binman: binman {
+		multiple-images;
+	};
+};
+
+&binman {
+	simple-bin {
 		filename = "u-boot-rockchip.bin";
 		pad-byte = <0xff>;
 

arch/arm/mach-rockchip/Kconfig

@@ -367,6 +367,15 @@ config TPL_ROCKCHIP_EARLYRETURN_TO_BROM
 config SPL_MMC_SUPPORT
 	default y if !SPL_ROCKCHIP_BACK_TO_BROM
 
+config ROCKCHIP_SPI_IMAGE
+	bool "Build a SPI image for rockchip"
+	depends on HAS_ROM
+	help
+	  Some Rockchip SoCs support booting from SPI flash. Enable this
+	  option to produce a 4MB SPI-flash image (called u-boot.rom)
+	  containing U-Boot. The image is built by binman. U-Boot sits near
+	  the start of the image.
+
 source "arch/arm/mach-rockchip/px30/Kconfig"
 source "arch/arm/mach-rockchip/rk3036/Kconfig"
 source "arch/arm/mach-rockchip/rk3128/Kconfig"

arch/arm/mach-rockchip/rk3288/Kconfig

@@ -5,7 +5,9 @@ choice
 
 config TARGET_CHROMEBOOK_JERRY
 	bool "Google/Rockchip Veyron-Jerry Chromebook"
+	select HAS_ROM
 	select BOARD_LATE_INIT
+	select ROCKCHIP_SPI_IMAGE
 	help
 	  Jerry is a RK3288-based clamshell device with 2 USB 3.0 ports,
 	  HDMI, an 11.9 inch EDP display, micro-SD card, touchpad and