ARM: gemini: convert to ARMv4 multiplatform

This converts the Gemini platform to ARMv4 multiplatform, deleting
the local <mach/*> include directory, moving an idiomatic local
idling function into the .machine_init() call and getting rid of
the Makefile.boot finally.

Cc: Janos Laube <janos.dev@gmail.com>
Cc: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/Kconfig

@@ -359,25 +359,6 @@ config ARM_SINGLE_ARMV7M
 	select SPARSE_IRQ
 	select USE_OF
 
-config ARCH_GEMINI
-	bool "Cortina Systems Gemini"
-	select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
-	select ARM_PATCH_PHYS_VIRT
-	select AUTO_ZRELADDR
-	select CPU_FA526
-	select FARADAY_FTINTC010
-	select FTTMR010_TIMER
-	select GPIO_GEMINI
-	select GPIOLIB
-	select MULTI_IRQ_HANDLER
-	select POWER_RESET
-	select POWER_RESET_SYSCON
-	select SERIAL_OF_PLATFORM
-	select SPARSE_IRQ
-	select USE_OF
-	help
-	  Support for the Cortina Systems Gemini family SoCs
-
 config ARCH_EBSA110
 	bool "EBSA-110"
 	select ARCH_USES_GETTIMEOFFSET
@@ -758,6 +739,8 @@ source "arch/arm/mach-ep93xx/Kconfig"
 
 source "arch/arm/mach-footbridge/Kconfig"
 
+source "arch/arm/mach-gemini/Kconfig"
+
 source "arch/arm/mach-highbank/Kconfig"
 
 source "arch/arm/mach-hisi/Kconfig"

arch/arm/mach-gemini/Kconfig

@@ -0,0 +1,13 @@
+menuconfig ARCH_GEMINI
+	bool "Cortina Systems Gemini"
+	depends on ARCH_MULTI_V4
+	select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
+	select FARADAY_FTINTC010
+	select FTTMR010_TIMER
+	select GPIO_GEMINI
+	select GPIOLIB
+	select POWER_RESET
+	select POWER_RESET_SYSCON
+	select SERIAL_OF_PLATFORM
+	help
+	  Support for the Cortina Systems Gemini family SoCs

arch/arm/mach-gemini/Makefile

@@ -1,2 +1,2 @@
 # Makefile for Cortina systems Gemini
-obj-y			:= idle.o board-dt.o
+obj-y			:= board-dt.o

arch/arm/mach-gemini/board-dt.c

@@ -7,6 +7,8 @@
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
+#include <asm/system_misc.h>
+#include <asm/proc-fns.h>
 
 #ifdef CONFIG_DEBUG_GEMINI
 /* This is needed for LL-debug/earlyprintk/debug-macro.S */
@@ -27,12 +29,34 @@ static void __init gemini_map_io(void)
 #define gemini_map_io NULL
 #endif
 
+static void gemini_idle(void)
+{
+	/*
+	 * Because of broken hardware we have to enable interrupts or the CPU
+	 * will never wakeup... Acctualy it is not very good to enable
+	 * interrupts first since scheduler can miss a tick, but there is
+	 * no other way around this. Platforms that needs it for power saving
+	 * should enable it in init code, since by default it is
+	 * disabled.
+	 */
+
+	/* FIXME: Enabling interrupts here is racy! */
+	local_irq_enable();
+	cpu_do_idle();
+}
+
+static void __init gemini_init_machine(void)
+{
+	arm_pm_idle = gemini_idle;
+}
+
 static const char *gemini_board_compat[] = {
 	"cortina,gemini",
 	NULL,
 };
 
 DT_MACHINE_START(GEMINI_DT, "Gemini (Device Tree)")
 	.map_io		= gemini_map_io,
+	.init_machine	= gemini_init_machine,
 	.dt_compat	= gemini_board_compat,
 MACHINE_END