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authorMike Rapoport <mike@compulab.co.il>2009-05-26 09:10:18 +0300
committerEric Miao <eric.y.miao@gmail.com>2009-06-05 10:32:48 +0800
commitd082d36ea82aff6f25e8380770713e6fd0c7290a (patch)
tree7e91b06429cead8907da244ecb71aae7cdea05bb /arch/arm
parent94c35a6b5129bc370893d74085c13607f260ef39 (diff)
[ARM] pxa: add ability to set suspend mode
PXA processors have several low-power modes. Currently kernel supports only one of these modes for PM_SUSPEND_MEM. This patch adds ability to set desired suspend mode for PXA27x based machines. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Reviewed-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Eric Miao <eric.miao@marvell.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-pxa/include/mach/pxa27x.h3
-rw-r--r--arch/arm/mach-pxa/pxa27x.c19
2 files changed, 21 insertions, 1 deletions
diff --git a/arch/arm/mach-pxa/include/mach/pxa27x.h b/arch/arm/mach-pxa/include/mach/pxa27x.h
index 6876e16c297..0b702693f45 100644
--- a/arch/arm/mach-pxa/include/mach/pxa27x.h
+++ b/arch/arm/mach-pxa/include/mach/pxa27x.h
@@ -16,4 +16,7 @@
#define ARB_DMA_PARK (1<<25) /* Be parked with DMA when idle */
#define ARB_CORE_PARK (1<<24) /* Be parked with core when idle */
#define ARB_LOCK_FLAG (1<<23) /* Only Locking masters gain access to the bus */
+
+extern int __init pxa27x_set_pwrmode(unsigned int mode);
+
#endif /* __MACH_PXA27x_H */
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index c54ad8b3343..ec68cc16b4e 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -204,6 +204,23 @@ static struct clk_lookup pxa27x_clkregs[] = {
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
/*
+ * allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
+ */
+static unsigned int pwrmode = PWRMODE_SLEEP;
+
+int __init pxa27x_set_pwrmode(unsigned int mode)
+{
+ switch (mode) {
+ case PWRMODE_SLEEP:
+ case PWRMODE_DEEPSLEEP:
+ pwrmode = mode;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/*
* List of global PXA peripheral registers to preserve.
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
@@ -254,7 +271,7 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
pxa_cpu_standby();
break;
case PM_SUSPEND_MEM:
- pxa27x_cpu_suspend(PWRMODE_SLEEP);
+ pxa27x_cpu_suspend(pwrmode);
break;
}
}