Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 05011f71 authored by Jean Pihet's avatar Jean Pihet Committed by Kevin Hilman
Browse files

ARM: OMAP3: PM: cpuidle: optimize the clkdm idle latency in C1 state 



For a power domain to idle all the clock domains in it must idle.
This patch implements an optimization of the cpuidle code by
denying and later allowing only the first registered clock domain
of a power domain, and so optimizes the latency of the low power code.

The functions _cpuidle_allow_idle and _cpuidle_deny_idle are
not used anymore and so are removed.

Signed-off-by: default avatarJean Pihet <j-pihet@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
parent 13d65c89

arch/arm/mach-omap2/cpuidle34xx.c

+4 −18
Original line number Diff line number Diff line
@@ -77,20 +77,6 @@ static struct omap3_idle_statedata omap3_idle_data[] = { 


static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;



static int _cpuidle_allow_idle(struct powerdomain *pwrdm,

				struct clockdomain *clkdm)

{

	clkdm_allow_idle(clkdm);

	return 0;

}



static int _cpuidle_deny_idle(struct powerdomain *pwrdm,

				struct clockdomain *clkdm)

{

	clkdm_deny_idle(clkdm);

	return 0;

}



static int __omap3_enter_idle(struct cpuidle_device *dev,

				struct cpuidle_driver *drv,

				int index)
@@ -108,8 +94,8 @@ static int __omap3_enter_idle(struct cpuidle_device *dev, 


	/* Deny idle for C1 */

	if (index == 0) {

		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_deny_idle);

		pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle);

		clkdm_deny_idle(mpu_pd->pwrdm_clkdms[0]);

		clkdm_deny_idle(core_pd->pwrdm_clkdms[0]);

	}



	/*
@@ -131,8 +117,8 @@ static int __omap3_enter_idle(struct cpuidle_device *dev, 


	/* Re-allow idle for C1 */

	if (index == 0) {

		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle);

		pwrdm_for_each_clkdm(core_pd, _cpuidle_allow_idle);

		clkdm_allow_idle(mpu_pd->pwrdm_clkdms[0]);

		clkdm_allow_idle(core_pd->pwrdm_clkdms[0]);

	}



return_sleep_time: