[POWERPC] mpc52xx suspend to deep-sleep

Implement deep-sleep on MPC52xx.
SDRAM is put into self-refresh with help of SRAM code
(alternatives would be code in FLASH, I-cache).
Interrupt code must also not be in SDRAM, so put it
in I-cache.
MPC52xx core is static, so contents will remain intact even
with clocks turned off.

Signed-off-by: Domen Puncer <domen.puncer@telargo.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/asm-powerpc/mpc52xx.h b/include/asm-powerpc/mpc52xx.h
index 7afd5bf94528..c4631f6dd4f9 100644
--- a/include/asm-powerpc/mpc52xx.h
+++ b/include/asm-powerpc/mpc52xx.h
@@ -253,5 +253,16 @@ extern int __init mpc52xx_add_bridge(struct device_node *node);
 
 #endif /* __ASSEMBLY__ */
 
+#ifdef CONFIG_PM
+struct mpc52xx_suspend {
+        void (*board_suspend_prepare)(void __iomem *mbar);
+        void (*board_resume_finish)(void __iomem *mbar);
+};
+
+extern struct mpc52xx_suspend mpc52xx_suspend;
+extern int __init mpc52xx_pm_init(void);
+extern int mpc52xx_set_wakeup_gpio(u8 pin, u8 level);
+#endif /* CONFIG_PM */
+
 #endif /* __ASM_POWERPC_MPC52xx_H__ */