Pass residency information to the mcpm_cpu_suspend. The information is taken from the target_residency of the intended C-state.

When a platform uses multiple powerdown cstates, the residency information indicates which powerdown state is targeted. Multiple powerdown cstate information can be maintained in the device tree and the vendor specific handling will then have enough information to determine what power state to enter without needing additional changes to the big_little framework.

Signed-off-by: Sebastian Capella sebastian.capella@linaro.org --- drivers/cpuidle/arm_big_little.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/arm_big_little.c b/drivers/cpuidle/arm_big_little.c index a430800..8332b05 100644 --- a/drivers/cpuidle/arm_big_little.c +++ b/drivers/cpuidle/arm_big_little.c @@ -89,7 +89,7 @@ static int notrace bl_powerdown_finisher(unsigned long arg) unsigned int cpu = mpidr & 0xf;

mcpm_set_entry_vector(cpu, cluster, cpu_resume); - mcpm_cpu_suspend(0); /* 0 should be replaced with better value here */ + mcpm_cpu_suspend(arg); return 1; }

@@ -107,6 +107,7 @@ static int bl_enter_powerdown(struct cpuidle_device *dev, { struct timespec ts_preidle, ts_postidle, ts_idle; int ret; + struct cpuidle_state *state = &drv->states[idx];

/* Used to keep track of the total time in idle */ getnstimeofday(&ts_preidle); @@ -117,7 +118,8 @@ static int bl_enter_powerdown(struct cpuidle_device *dev,

clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);

- ret = cpu_suspend((unsigned long) dev, bl_powerdown_finisher); + ret = cpu_suspend((unsigned long) state->target_residency, + bl_powerdown_finisher); if (ret) BUG();