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authorTero Kristo <t-kristo@ti.com>2011-12-16 14:36:58 -0700
committerPaul Walmsley <paul@pwsan.com>2011-12-16 14:36:58 -0700
commit91285b6fa296657d92dc2225100fb94aee869bf2 (patch)
treead06e6b86a2da5e09eb9222e73ed82286ac06542 /arch/arm/mach-omap2/prm2xxx_3xxx.h
parent0a84a91c37ada296ffe7147e73af99b5654628ec (diff)
ARM: OMAP: PRCM: add suspend prepare / finish support
PRCM chain handler needs to disable forwarding of interrupts during suspend, because runtime PM is disabled and most of the drivers are potentially not able to handle interrupts coming at this time. This patch masks all the PRCM interrupt events if a PRCM interrupt occurs during suspend, but does not ack them. Once suspend finish is called, all the masked events will be re-enabled, which causes immediate PRCM interrupt and handles the postponed event. The suspend prepare and complete callbacks will be called from pm34xx.c / pm44xx.c files in the following patches. The functions defined in this patch should eventually be moved to suspend->prepare and suspend->finish driver hooks, once the PRCM chain handler will be made as its own driver. Signed-off-by: Tero Kristo <t-kristo@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Tested-by: Kevin Hilman <khilman@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> [paul@pwsan.com: add kerneldoc, add omap_prcm_irq_setup.saved_mask, add fn ptrs for save_and_clear_irqen() and restore_irqen()] Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/prm2xxx_3xxx.h')
-rw-r--r--arch/arm/mach-omap2/prm2xxx_3xxx.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.h b/arch/arm/mach-omap2/prm2xxx_3xxx.h
index 3ef0e77ff93..70ac2a19dc5 100644
--- a/arch/arm/mach-omap2/prm2xxx_3xxx.h
+++ b/arch/arm/mach-omap2/prm2xxx_3xxx.h
@@ -318,6 +318,8 @@ extern u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset);
/* PRM interrupt-related functions */
extern void omap3xxx_prm_read_pending_irqs(unsigned long *events);
extern void omap3xxx_prm_ocp_barrier(void);
+extern void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask);
+extern void omap3xxx_prm_restore_irqen(u32 *saved_mask);
#endif /* CONFIG_ARCH_OMAP4 */