aboutsummaryrefslogtreecommitdiff
path: root/arch/blackfin/mach-common
diff options
context:
space:
mode:
authorSonic Zhang <sonic.zhang@analog.com>2012-05-17 17:33:00 +0800
committerBob Liu <lliubbo@gmail.com>2012-05-21 14:54:52 +0800
commit72b099ed93989575b0c447023748968d30059e8f (patch)
tree0e5bb7040da26232d66c2fb6c24854566ed9a07a /arch/blackfin/mach-common
parent0fbd88ca20a68a633b565e1f5ba18ca64afb0c78 (diff)
blackfin: bf60x: pm: Add a debug option to calculate kernel wakeup time.
Display the total time when kernel resumes normal from standby or suspend to mem mode. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin/mach-common')
-rw-r--r--arch/blackfin/mach-common/dpmc_modes.S8
-rw-r--r--arch/blackfin/mach-common/pm.c30
2 files changed, 38 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/dpmc_modes.S b/arch/blackfin/mach-common/dpmc_modes.S
index cfb7c3c0037..de99f3aac2c 100644
--- a/arch/blackfin/mach-common/dpmc_modes.S
+++ b/arch/blackfin/mach-common/dpmc_modes.S
@@ -42,6 +42,9 @@ ENTRY(_sleep_mode)
BITCLR (R7, 5);
w[p0] = R7.L;
IDLE;
+
+ bfin_init_pm_bench_cycles;
+
call _test_pll_locked;
RETS = [SP++];
@@ -74,6 +77,9 @@ ENTRY(_hibernate_mode)
/* Finally, we climb into our cave to hibernate */
W[P3] = R4.L;
+
+ bfin_init_pm_bench_cycles;
+
CLI R2;
IDLE;
.Lforever:
@@ -158,6 +164,8 @@ ENTRY(_sleep_deeper)
SSYNC;
IDLE;
+ bfin_init_pm_bench_cycles;
+
call _test_pll_locked;
P0.H = hi(PLL_DIV);
diff --git a/arch/blackfin/mach-common/pm.c b/arch/blackfin/mach-common/pm.c
index 610a3cdf399..ca6655e0d65 100644
--- a/arch/blackfin/mach-common/pm.c
+++ b/arch/blackfin/mach-common/pm.c
@@ -247,9 +247,39 @@ static int bfin_pm_enter(suspend_state_t state)
return 0;
}
+#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
+void bfin_pm_end(void)
+{
+ u32 cycle, cycle2;
+ u64 usec64;
+ u32 usec;
+
+ __asm__ __volatile__ (
+ "1: %0 = CYCLES2\n"
+ "%1 = CYCLES\n"
+ "%2 = CYCLES2\n"
+ "CC = %2 == %0\n"
+ "if ! CC jump 1b\n"
+ : "=d,a" (cycle2), "=d,a" (cycle), "=d,a" (usec) : : "CC"
+ );
+
+ usec64 = ((u64)cycle2 << 32) + cycle;
+ do_div(usec64, get_cclk() / USEC_PER_SEC);
+ usec = usec64;
+ if (usec == 0)
+ usec = 1;
+
+ pr_info("PM: resume of kernel completes after %ld msec %03ld usec\n",
+ usec / USEC_PER_MSEC, usec % USEC_PER_MSEC);
+}
+#endif
+
static const struct platform_suspend_ops bfin_pm_ops = {
.enter = bfin_pm_enter,
.valid = bfin_pm_valid,
+#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
+ .end = bfin_pm_end,
+#endif
};
static int __init bfin_pm_init(void)