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authorDavid Anders <danders@amltd.com>2006-09-26 17:46:00 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-27 23:44:33 +0100
commit26f908186f923291999833e9d563259834bdca06 (patch)
tree3fd7656ade08d17d6213fdaa27c86bda6f4b0b8b /arch
parentea33a59802f8fd21d24fbf5c906bc3f399bcca00 (diff)
downloadlinaro-lsk-26f908186f923291999833e9d563259834bdca06.tar.gz
[ARM] 3862/2: S3C2410 - add basic power management support for AML M5900 series
this patch registers the wakeup irq, sets a gpio pin to indicate the status of system for suspend/resume operations, and adds the machine to the supported machines for use with the simtec-pm Signed-off-by: David Anders <danders@amltd.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-s3c2410/Kconfig2
-rw-r--r--arch/arm/mach-s3c2410/mach-amlm5900.c25
-rw-r--r--arch/arm/mach-s3c2410/pm-simtec.c3
-rw-r--r--arch/arm/mach-s3c2410/s3c2410-pm.c9
4 files changed, 35 insertions, 4 deletions
diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig
index e50a73f93d3..df37594c30f 100644
--- a/arch/arm/mach-s3c2410/Kconfig
+++ b/arch/arm/mach-s3c2410/Kconfig
@@ -292,7 +292,7 @@ config S3C2410_PM_CHECK_CHUNKSIZE
config PM_SIMTEC
bool
- depends on PM && (ARCH_BAST || MACH_VR1000)
+ depends on PM && (ARCH_BAST || MACH_VR1000 || MACH_AML_M5900)
default y
config S3C2410_LOWLEVEL_UART_PORT
diff --git a/arch/arm/mach-s3c2410/mach-amlm5900.c b/arch/arm/mach-s3c2410/mach-amlm5900.c
index 0c9b7dafbe9..ba5109af40b 100644
--- a/arch/arm/mach-s3c2410/mach-amlm5900.c
+++ b/arch/arm/mach-s3c2410/mach-amlm5900.c
@@ -225,13 +225,34 @@ static struct s3c2410fb_mach_info __initdata amlm5900_lcd_info = {
};
#endif
-static void __init amlm5900_init(void)
+static irqreturn_t
+amlm5900_wake_interrupt(int irq, void *ignored, struct pt_regs *regs)
{
+ return IRQ_HANDLED;
+}
+static void amlm5900_init_pm(void)
+{
+ int ret = 0;
+
+ ret = request_irq(IRQ_EINT9, &amlm5900_wake_interrupt,
+ IRQF_TRIGGER_RISING | IRQF_SHARED,
+ "amlm5900_wakeup", &amlm5900_wake_interrupt);
+ if (ret != 0) {
+ printk(KERN_ERR "AML-M5900: no wakeup irq, %d?\n", ret);
+ } else {
+ enable_irq_wake(IRQ_EINT9);
+ /* configure the suspend/resume status pin */
+ s3c2410_gpio_cfgpin(S3C2410_GPF2, S3C2410_GPF2_OUTP);
+ s3c2410_gpio_pullup(S3C2410_GPF2, 0);
+ }
+}
+static void __init amlm5900_init(void)
+{
+ amlm5900_init_pm();
#ifdef CONFIG_FB_S3C2410
s3c24xx_fb_set_platdata(&amlm5900_lcd_info);
#endif
-
}
MACHINE_START(AML_M5900, "AML_M5900")
diff --git a/arch/arm/mach-s3c2410/pm-simtec.c b/arch/arm/mach-s3c2410/pm-simtec.c
index 7b244566a43..42cd05e298f 100644
--- a/arch/arm/mach-s3c2410/pm-simtec.c
+++ b/arch/arm/mach-s3c2410/pm-simtec.c
@@ -49,7 +49,8 @@ static __init int pm_simtec_init(void)
/* check which machine we are running on */
if (!machine_is_bast() && !machine_is_vr1000() &&
- !machine_is_anubis() && !machine_is_osiris())
+ !machine_is_anubis() && !machine_is_osiris() &&
+ !machine_is_aml_m5900())
return 0;
printk(KERN_INFO "Simtec Board Power Manangement" COPYRIGHT "\n");
diff --git a/arch/arm/mach-s3c2410/s3c2410-pm.c b/arch/arm/mach-s3c2410/s3c2410-pm.c
index 3080d25a12d..e51d7666951 100644
--- a/arch/arm/mach-s3c2410/s3c2410-pm.c
+++ b/arch/arm/mach-s3c2410/s3c2410-pm.c
@@ -29,6 +29,8 @@
#include <asm/hardware.h>
#include <asm/io.h>
+#include <asm/mach-types.h>
+
#include <asm/arch/regs-gpio.h>
#include "cpu.h"
@@ -49,6 +51,10 @@ static void s3c2410_pm_prepare(void)
DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
+
+ if ( machine_is_aml_m5900() )
+ s3c2410_gpio_setpin(S3C2410_GPF2, 1);
+
}
int s3c2410_pm_resume(struct sys_device *dev)
@@ -61,6 +67,9 @@ int s3c2410_pm_resume(struct sys_device *dev)
tmp &= S3C2410_GSTATUS2_OFFRESET;
__raw_writel(tmp, S3C2410_GSTATUS2);
+ if ( machine_is_aml_m5900() )
+ s3c2410_gpio_setpin(S3C2410_GPF2, 0);
+
return 0;
}