rk: move early_printk.c from mach-rk29 to plat-rk and add RK_EARLY_PRINTK config

arch/arm/mach-rk29/Makefile

@@ -1,9 +1,5 @@
 obj-y += timer.o io.o devices.o iomux.o clock.o rk29-pl330.o dma.o ddr.o memcpy_dma.o reset.o
 obj-y += tests.o memtester.o
-obj-y += early_printk.o
-ifndef CONFIG_DEBUG_LL
-obj-y += ../kernel/debug.o
-endif
 obj-$(CONFIG_PM) += pm.o
 obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_DDR_FREQ) += ddrfreq.o

arch/arm/mach-rk30/Makefile

@@ -6,9 +6,5 @@ obj-y += iomux.o
 obj-y += reset.o
 obj-y += timer.o
 obj-$(CONFIG_FIQ) += fiq.o
-obj-y += ../mach-rk29/early_printk.o
-ifndef CONFIG_DEBUG_LL
-obj-y += ../kernel/debug.o
-endif
 obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
 obj-$(CONFIG_MACH_RK30_SDK) += board-rk30-sdk.o board-rk30-sdk-key.o

arch/arm/mach-rk30/common.c

@@ -12,8 +12,6 @@
 #include <mach/iomux.h>
 #include <mach/fiq.h>
 
-extern void __init rk29_setup_early_printk(void);
-
 void __init rk30_init_irq(void)
 {
 	gic_init(0, IRQ_LOCALTIMER, RK30_GICD_BASE, RK30_GICC_BASE);

arch/arm/plat-rk/Kconfig

@@ -106,4 +106,12 @@ config RK29_LAST_LOG
 	help
 	  It is only intended for debugging.
 
+config RK_EARLY_PRINTK
+	bool "Early printk"
+	depends on PRINTK && !DEBUG_LL
+	default y
+	help
+	  Say Y here if you want to have an early console using the
+	  kernel low-level debugging functions.
+
 endif

arch/arm/plat-rk/Makefile

@@ -3,5 +3,6 @@ obj-$(CONFIG_USB_GADGET) += usb_detect.o
 obj-$(CONFIG_RK29_VPU) += vpu_service.o
 obj-$(CONFIG_ARCH_RK30) += dma-pl330.o
 obj-$(CONFIG_FIQ_DEBUGGER) += rk_fiq_debugger.o
+obj-$(CONFIG_RK_EARLY_PRINTK) += early_printk.o ../kernel/debug.o
 obj-y += mem_reserve.o
 obj-y += sram.o

arch/arm/plat-rk/include/plat/board.h

@@ -93,6 +93,12 @@ int board_usb_detect_init(unsigned gpio);
 static int inline board_usb_detect_init(unsigned gpio) { return 0; }
 #endif
 
+#ifdef CONFIG_RK_EARLY_PRINTK
+void __init rk29_setup_early_printk(void);
+#else
+static void inline rk29_setup_early_printk(void) {}
+#endif
+
 /* for wakeup Android */
 void rk28_send_wakeup_key(void);