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ARM: OMAP2+: clockdomain: add usecounting support to autoidle APIs

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The previous implementation was racy in many locations, where the current
status of the clockdomain was read out, some operations were executed,
and the previous status info was used afterwards to decide next state
for the clockdomain. Instead, fix the implementation of the allow_idle /
deny_idle APIs to properly have usecounting support. This allows clean
handling internally within the clockdomain core, and simplifies the
usage also within hwmod.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tero Kristo
2016-06-30 16:15:02 +03:00
committed by Tony Lindgren
parent e98580e880
commit 1d9a542565
7 changed files with 47 additions and 50 deletions
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arch/arm/mach-omap2/omap-smp.c
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@@ -200,7 +200,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle)
* Ensure that CPU power state is set to ON to avoid CPU
* powerdomain transition on wfi
*/
clkdm_wakeup_nolock(cpu1_clkdm);
clkdm_deny_idle_nolock(cpu1_clkdm);
pwrdm_set_next_pwrst(cpu1_pwrdm, PWRDM_POWER_ON);
clkdm_allow_idle_nolock(cpu1_clkdm);