[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>
diff --git a/arch/arm/mach-pxa/include/mach/pxa27x.h b/arch/arm/mach-pxa/include/mach/pxa27x.h
index 6876e16..0b70269 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 c54ad8b..ec68cc1 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -204,6 +204,23 @@
#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 @@
pxa_cpu_standby();
break;
case PM_SUSPEND_MEM:
- pxa27x_cpu_suspend(PWRMODE_SLEEP);
+ pxa27x_cpu_suspend(pwrmode);
break;
}
}