* Copyright (C) 2007-2009 Nokia Corporation
*
* Written by Paul Walmsley
- *
* Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
+ * State counting code by Tero Kristo <tero.kristo@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0;
}
+/**
+ * pwrdm_set_lowpwrstchange - Request a low power state change
+ * @pwrdm: struct powerdomain *
+ *
+ * Allows a powerdomain to transtion to a lower power sleep state
+ * from an existing sleep state without waking up the powerdomain.
+ * Returns -EINVAL if the powerdomain pointer is null or if the
+ * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
+ * upon success.
+ */
+int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+ if (!pwrdm)
+ return -EINVAL;
+
+ if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
+ return -EINVAL;
+
+ pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
+ pwrdm->name);
+
+ prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
+ (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
+ pwrdm->prcm_offs, pwrstctrl_reg_offs);
+
+ return 0;
+}
+
/**
* pwrdm_wait_transition - wait for powerdomain power transition to finish
* @pwrdm: struct powerdomain * to wait for
/* XXX Is this udelay() value meaningful? */
while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) &
- OMAP_INTRANSITION) &&
+ OMAP_INTRANSITION_MASK) &&
(c++ < PWRDM_TRANSITION_BAILOUT))
udelay(1);