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intel_idle: disable Atom/Lincroft HW C-state auto-demotion

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Just as we had to disable auto-demotion for NHM/WSM,
we need to do the same for Atom (Lincroft version).

In particular, auto-demotion will prevent Lincroft
from entering the S0i3 idle power saving state.

https://bugzilla.kernel.org/show_bug.cgi?id=25252

Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Len Brown 2011-02-16 01:32:48 -05:00
commit bfb53ccf1c
2 changed files with 5 additions and 0 deletions
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4
drivers/idle/intel_idle.c
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@ -345,8 +345,12 @@ static int intel_idle_probe(void)
break;
case 0x1C: /* 28 - Atom Processor */
cpuidle_state_table = atom_cstates;
break;
case 0x26: /* 38 - Lincroft Atom Processor */
cpuidle_state_table = atom_cstates;
auto_demotion_disable_flags = ATM_LNC_C6_AUTO_DEMOTE;
break;
case 0x2A: /* SNB */