diff options
| author | Arve Hjønnevåg <arve@android.com> | 2011-02-23 16:51:58 -0800 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 13:40:33 -0700 |
| commit | abc4a85b910ca17890117b48641d21704606e4b4 (patch) | |
| tree | 831cf198dfd993cb853d1fd390519982df674169 /arch | |
| parent | e85c25b3e681ea3759790f4c9c7cde527a43d7e2 (diff) | |
ARM: etm: Power down etm(s) when tracing is not enabled
Without this change a saw an 18% increase in idle power consumption
on one deivce when trace support is compiled into the kernel. Now
I see the same increase only when tracing.
Change-Id: I21bb5ecf1b7d29ce3790ceeb5323409cc22d5a3b
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/etm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c index b550f5c1104..5d0e0696175 100644 --- a/arch/arm/kernel/etm.c +++ b/arch/arm/kernel/etm.c @@ -200,7 +200,7 @@ static int trace_stop_etm(struct tracectx *t, int id) etm_unlock(t, id); - etm_writel(t, id, 0x440, ETMR_CTRL); + etm_writel(t, id, 0x441, ETMR_CTRL); while (!(etm_readl(t, id, ETMR_CTRL) & ETMCTRL_PROGRAM) && --timeout) ; if (!timeout) { @@ -739,7 +739,7 @@ static int etm_probe(struct amba_device *dev, const struct amba_id *id) (void)etm_readl(&tracer, t->etm_regs_count, ETMMR_OSSRR); t->ncmppairs = etm_readl(t, t->etm_regs_count, ETMR_CONFCODE) & 0xf; - etm_writel(t, t->etm_regs_count, 0x440, ETMR_CTRL); + etm_writel(t, t->etm_regs_count, 0x441, ETMR_CTRL); etm_writel(t, t->etm_regs_count, new_count, ETMR_TRACEIDR); etm_lock(t, t->etm_regs_count); |