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Commit 71a488db authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Paul Walmsley
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OMAP4: PM: Use the low-power state change feature on OMAP4



For pwrdm's which support LOWPOWERSTATECHANGE, do not try waking
up the domain to put it back to deeper sleep state.

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: default avatarBenoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
parent 6081dc34
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+22 −6
Original line number Diff line number Diff line
@@ -89,6 +89,10 @@ static void omap2_init_processor_devices(void)
	}
}

/* Types of sleep_switch used in omap_set_pwrdm_state */
#define FORCEWAKEUP_SWITCH	0
#define LOWPOWERSTATE_SWITCH	1

/*
 * This sets pwrdm state (other than mpu & core. Currently only ON &
 * RET are supported. Function is assuming that clkdm doesn't have
@@ -114,9 +118,14 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
		return ret;

	if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
		if ((pwrdm_read_pwrst(pwrdm) > state) &&
			(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) {
			sleep_switch = LOWPOWERSTATE_SWITCH;
		} else {
			omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
		sleep_switch = 1;
			pwrdm_wait_transition(pwrdm);
			sleep_switch = FORCEWAKEUP_SWITCH;
		}
	}

	ret = pwrdm_set_next_pwrst(pwrdm, state);
@@ -126,12 +135,19 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
		goto err;
	}

	if (sleep_switch) {
	switch (sleep_switch) {
	case FORCEWAKEUP_SWITCH:
		omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
		pwrdm_wait_transition(pwrdm);
		pwrdm_state_switch(pwrdm);
		break;
	case LOWPOWERSTATE_SWITCH:
		pwrdm_set_lowpwrstchange(pwrdm);
		break;
	default:
		return ret;
	}

	pwrdm_wait_transition(pwrdm);
	pwrdm_state_switch(pwrdm);
err:
	return ret;
}