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Commit ff819da4 authored by Santosh Shilimkar's avatar Santosh Shilimkar Committed by Kevin Hilman
Browse files

ARM: OMAP3: CPUidle: Make use of CPU PM notifiers 



Save VFP CPU context using CPU PM notifier chain. VFP context
is lost when CPU hits OFF state.

Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: default avatarKevin Hilman <khilman@ti.com>
Tested-by: default avatarVishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
parent 98be0dde

arch/arm/mach-omap2/cpuidle34xx.c

+15 −0
Original line number Original line Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/sched.h>

#include <linux/sched.h>

#include <linux/cpuidle.h>

#include <linux/cpuidle.h>

#include <linux/export.h>

#include <linux/export.h>

#include <linux/cpu_pm.h>





#include <plat/prcm.h>

#include <plat/prcm.h>

#include <plat/irqs.h>

#include <plat/irqs.h>
@@ -124,9 +125,23 @@ static int omap3_enter_idle(struct cpuidle_device *dev, 
		pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle);

		pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle);

	}

	}





	/*

	 * Call idle CPU PM enter notifier chain so that

	 * VFP context is saved.

	 */

	if (mpu_state == PWRDM_POWER_OFF)

		cpu_pm_enter();



	/* Execute ARM wfi */

	/* Execute ARM wfi */

	omap_sram_idle();

	omap_sram_idle();





	/*

	 * Call idle CPU PM enter notifier chain to restore

	 * VFP context.

	 */

	if (pwrdm_read_prev_pwrst(mpu_pd) == PWRDM_POWER_OFF)

		cpu_pm_exit();



	/* Re-allow idle for C1 */

	/* Re-allow idle for C1 */

	if (index == 0) {

	if (index == 0) {

		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle);

		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle);