ARM: OMAP2: PM/powerdomain: drop unnecessary pwrdm_wait_transition()

Drop an unnecessary pwrdm_wait_transition() from mach-omap2/pm.c -
it's called by the subsequent pwrdm_state_switch().

Also get rid of pwrdm_wait_transition() in the powerdomain code - there's
no longer any need to export this function.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-omap2/pm.c

@@ -171,7 +171,6 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 pwrst)
 		break;
 	case LOWPOWERSTATE_SWITCH:
 		pwrdm_set_lowpwrstchange(pwrdm);
-		pwrdm_wait_transition(pwrdm);
 		pwrdm_state_switch(pwrdm);
 		break;
 	}

arch/arm/mach-omap2/powerdomain.c

@@ -112,7 +112,7 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
 	for (i = 0; i < pwrdm->banks; i++)
 		pwrdm->ret_mem_off_counter[i] = 0;
 
-	pwrdm_wait_transition(pwrdm);
+	arch_pwrdm->pwrdm_wait_transition(pwrdm);
 	pwrdm->state = pwrdm_read_pwrst(pwrdm);
 	pwrdm->state_counter[pwrdm->state] = 1;
 
@@ -950,34 +950,14 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
 	return ret;
 }
 
-/**
- * pwrdm_wait_transition - wait for powerdomain power transition to finish
- * @pwrdm: struct powerdomain * to wait for
- *
- * If the powerdomain @pwrdm is in the process of a state transition,
- * spin until it completes the power transition, or until an iteration
- * bailout value is reached. Returns -EINVAL if the powerdomain
- * pointer is null, -EAGAIN if the bailout value was reached, or
- * returns 0 upon success.
- */
-int pwrdm_wait_transition(struct powerdomain *pwrdm)
-{
-	int ret = -EINVAL;
-
-	if (!pwrdm)
-		return -EINVAL;
-
-	if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition)
-		ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
-
-	return ret;
-}
-
 int pwrdm_state_switch(struct powerdomain *pwrdm)
 {
 	int ret;
 
-	ret = pwrdm_wait_transition(pwrdm);
+	if (!pwrdm || !arch_pwrdm)
+		return -EINVAL;
+
+	ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
 	if (!ret)
 		ret = _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
 

arch/arm/mach-omap2/powerdomain.h

@@ -225,8 +225,6 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
 int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
 bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
 
-int pwrdm_wait_transition(struct powerdomain *pwrdm);
-
 int pwrdm_state_switch(struct powerdomain *pwrdm);
 int pwrdm_pre_transition(struct powerdomain *pwrdm);
 int pwrdm_post_transition(struct powerdomain *pwrdm);