From: Tero Kristo <tero.kristo@xxxxxxxxx>
VFP save context is called before MPU/NEON off. Restore is not needed as
the next VFP trap will restore context automatically. Uses the support
routine implemented in arch/arm/vfp/vfpmodule.c.
Signed-off-by: Tero Kristo <tero.kristo@xxxxxxxxx>
Cc: Vishwanath Sripathy <vishwanath.bs@xxxxxx>
Cc: Rajendra Nayak <rnayak@xxxxxx>
Cc: Richard Woodruff <r-woodruff2@xxxxxx>
Cc: Peter 'p2' De Schrijver <peter.de-schrijver@xxxxxxxxx>
---
arch/arm/mach-omap2/pm.h | 1 +
arch/arm/mach-omap2/pm34xx.c | 14 +++++++++++++-
2 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index e0c94ea..bf9b7f9 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -23,6 +23,7 @@ extern void omap_sram_idle(void);
extern int omap3_can_sleep(void);
extern int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
extern int omap3_idle_init(void);
+extern void vfp_pm_save_context(void);
struct prm_setup_times_vc {
u16 clksetup;
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 009bc55..624a7af 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -321,6 +321,13 @@ static void restore_control_register(u32 val)
__asm__ __volatile__ ("mcr p15, 0, %0, c1, c0, 0" : : "r" (val));
}
+static inline void omap3_save_neon_context(void)
+{
+#ifdef CONFIG_VFP
+ vfp_pm_save_context();
+#endif
+}
+
/* Function to restore the table entry that was modified for enabling MMU */
static void restore_table_entry(void)
{
@@ -365,6 +372,7 @@ void omap_sram_idle(void)
/* save_state = 3 => L1, L2 and logic lost */
int save_state = 0;
int mpu_next_state = PWRDM_POWER_ON;
+ int neon_next_state = PWRDM_POWER_ON;
int per_next_state = PWRDM_POWER_ON;
int core_next_state = PWRDM_POWER_ON;
int core_prev_state, per_prev_state;
@@ -398,8 +406,12 @@ void omap_sram_idle(void)
pwrdm_pre_transition();
/* NEON control */
- if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON)
+ if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON) {
pwrdm_set_next_pwrst(neon_pwrdm, mpu_next_state);
+ neon_next_state = mpu_next_state;
+ if (neon_next_state == PWRDM_POWER_OFF)
+ omap3_save_neon_context();
+ }
/* PER */
per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
--
1.5.4.3
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