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authorPaul Walmsley <paul@pwsan.com>2010-12-21 15:30:56 -0700
committerPaul Walmsley <paul@pwsan.com>2010-12-21 20:56:50 -0700
commitf0611a5c220e50dec65041b10bd2fe9484f061a6 (patch)
treef94ba2787f721a38ad57d22638c5561318d31f26 /arch/arm/mach-omap2/cm2xxx_3xxx.h
parent59fb659b065f52fcc2deed293cfbfc58f890376c (diff)
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OMAP3: PRM/CM: separate CM context save/restore; remove PRM context save/restore
The OMAP3 PRM module is in the WKUP powerdomain, which is always powered when the chip is powered, so it shouldn't be necessary to save and restore those PRM registers. Remove the PRM register save/restore code, which should save several microseconds during off-mode entry/exit, since PRM register accesses are relatively slow. While doing so, move the CM register save/restore code into CM-specific code. The CM module has been distinct from the PRM module since 2430. This patch includes some minor changes to pm34xx.c. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Tero Kristo <tero.kristo@nokia.com> Cc: Kalle Jokiniemi <kalle.jokiniemi@digia.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Tested-by: Kevin Hilman <khilman@deeprootsystems.com> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Rajendra Nayak <rnayak@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/cm2xxx_3xxx.h')
-rw-r--r--arch/arm/mach-omap2/cm2xxx_3xxx.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cm2xxx_3xxx.h b/arch/arm/mach-omap2/cm2xxx_3xxx.h
index 5e572112be06..ce2582c1441b 100644
--- a/arch/arm/mach-omap2/cm2xxx_3xxx.h
+++ b/arch/arm/mach-omap2/cm2xxx_3xxx.h
@@ -128,4 +128,11 @@ extern u32 cm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx);
/* CM_IDLEST_GFX */
#define OMAP_ST_GFX_MASK (1 << 0)
+
+/* Function prototypes */
+# ifndef __ASSEMBLER__
+extern void omap3_cm_save_context(void);
+extern void omap3_cm_restore_context(void);
+# endif
+
#endif