[ARM] 3999/1: RX3715: suspend to RAM support

The RX3715 is similar to the H1940 in the way
that suspend to RAM works, so we can use most
of the extant support for the H1940 with only
a few modifictions

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

5 files changed, 32 insertions, 2 deletions

diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig
index 63965c78de8c..08b2f300eb79 100644
--- a/arch/arm/mach-s3c2410/Kconfig
+++ b/arch/arm/mach-s3c2410/Kconfig
@@ -41,9 +41,16 @@ config BAST_PC104_IRQ
           Say Y here to enable the PC104 IRQ routing on the
           Simtec BAST (EB2410ITX)
 
+config PM_H1940
+        bool
+        depends on PM
+        help
+          Internal node for H1940 and related PM
+
 config ARCH_H1940
         bool "IPAQ H1940"
         select CPU_S3C2410
+        select PM_H1940
         help
           Say Y here if you are using the HP IPAQ H1940
 
@@ -115,6 +122,7 @@ config MACH_VR1000
 config MACH_RX3715
         bool "HP iPAQ rx3715"
         select CPU_S3C2440
+        select PM_H1940
         help
           Say Y here if you are using the HP iPAQ rx3715.
 
diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
index 0cd71dfec447..27663e28cc88 100644
--- a/arch/arm/mach-s3c2410/Makefile
+++ b/arch/arm/mach-s3c2410/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_CPU_S3C2410_DMA)	+= s3c2410-dma.o
 
 obj-$(CONFIG_PM)                += pm.o sleep.o
 obj-$(CONFIG_PM_SIMTEC)         += pm-simtec.o
+obj-$(CONFIG_PM_H1940)          += pm-h1940.o
 
 # S3C2412 support
 obj-$(CONFIG_CPU_S3C2412)       += s3c2412.o
@@ -77,7 +78,7 @@ obj-$(CONFIG_MACH_AML_M5900)	+= mach-amlm5900.o
 obj-$(CONFIG_MACH_ANUBIS)       += mach-anubis.o
 obj-$(CONFIG_MACH_OSIRIS)       += mach-osiris.o
 obj-$(CONFIG_ARCH_BAST)         += mach-bast.o usb-simtec.o
-obj-$(CONFIG_ARCH_H1940)        += mach-h1940.o pm-h1940.o
+obj-$(CONFIG_ARCH_H1940)        += mach-h1940.o
 obj-$(CONFIG_MACH_N30)          += mach-n30.o
 obj-$(CONFIG_ARCH_SMDK2410)     += mach-smdk2410.o
 obj-$(CONFIG_MACH_SMDK2413)     += mach-smdk2413.o
diff --git a/arch/arm/mach-s3c2410/mach-rx3715.c b/arch/arm/mach-s3c2410/mach-rx3715.c
index 23d7c052013c..ecbcdf79d739 100644
--- a/arch/arm/mach-s3c2410/mach-rx3715.c
+++ b/arch/arm/mach-s3c2410/mach-rx3715.c
@@ -42,6 +42,7 @@
 #include <asm/arch/regs-gpio.h>
 #include <asm/arch/regs-lcd.h>
 
+#include <asm/arch/h1940.h>
 #include <asm/arch/nand.h>
 #include <asm/arch/fb.h>
 
@@ -224,7 +225,9 @@ static void __init rx3715_init_irq(void)
 
 static void __init rx3715_init_machine(void)
 {
+        memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
         s3c2410_pm_init();
+
         s3c24xx_fb_set_platdata(&rx3715_lcdcfg);
 }
 
diff --git a/arch/arm/mach-s3c2410/s3c2410-pm.c b/arch/arm/mach-s3c2410/s3c2410-pm.c
index 9cd0c104f1cb..77c6814c0f05 100644
--- a/arch/arm/mach-s3c2410/s3c2410-pm.c
+++ b/arch/arm/mach-s3c2410/s3c2410-pm.c
@@ -66,6 +66,22 @@ static void s3c2410_pm_prepare(void)
                 __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
         }
 
+        /* the RX3715 uses similar code and the same H1940 and the
+         * same offsets for resume and checksum pointers */
+
+        if (machine_is_rx3715()) {
+                void *base = phys_to_virt(H1940_SUSPEND_CHECK);
+                unsigned long ptr;
+                unsigned long calc = 0;
+
+                /* generate check for the bootloader to check on resume */
+
+                for (ptr = 0; ptr < 0x40000; ptr += 0x4)
+                        calc += __raw_readl(base+ptr);
+
+                __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
+        }
+
         if ( machine_is_aml_m5900() )
                 s3c2410_gpio_setpin(S3C2410_GPF2, 1);
 
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index f2d0d6f78973..b7f194af20b4 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -619,7 +619,9 @@ void __init reserve_node_zero(pg_data_t *pgdat)
         if (machine_is_p720t())
                 res_size = 0x00014000;
 
-        if (machine_is_h1940()) {
+        /* H1940 and RX3715 need to reserve this for suspend */
+
+        if (machine_is_h1940() || machine_is_rx3715()) {
                 reserve_bootmem_node(pgdat, 0x30003000, 0x1000);
                 reserve_bootmem_node(pgdat, 0x30081000, 0x1000);
         }