Merge branch 'stable/generic' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

[pandora-kernel.git] / arch / arm / mach-omap2 / cpuidle34xx.c

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 0d50b45..f3e043f 100644 (file)
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -27,8 +27,8 @@
 
 #include <plat/prcm.h>
 #include <plat/irqs.h>
-#include <plat/powerdomain.h>
-#include <plat/clockdomain.h>
+#include "powerdomain.h"
+#include "clockdomain.h"
 #include <plat/serial.h>
 
 #include "pm.h"
@@ -293,25 +293,26 @@ select_state:
 DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
 
 /**
- * omap3_cpuidle_update_states - Update the cpuidle states.
+ * omap3_cpuidle_update_states() - Update the cpuidle states
+ * @mpu_deepest_state: Enable states upto and including this for mpu domain
+ * @core_deepest_state:        Enable states upto and including this for core domain
  *
- * Currently, this function toggles the validity of idle states based upon
- * the flag 'enable_off_mode'. When the flag is set all states are valid.
- * Else, states leading to OFF state set to be invalid.
+ * This goes through the list of states available and enables and disables the
+ * validity of C states based on deepest state that can be achieved for the
+ * variable domain
  */
-void omap3_cpuidle_update_states(void)
+void omap3_cpuidle_update_states(u32 mpu_deepest_state, u32 core_deepest_state)
 {
        int i;
 
        for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
                struct omap3_processor_cx *cx = &omap3_power_states[i];
 
-               if (enable_off_mode) {
+               if ((cx->mpu_state >= mpu_deepest_state) &&
+                   (cx->core_state >= core_deepest_state)) {
                        cx->valid = 1;
                } else {
-                       if ((cx->mpu_state == PWRDM_POWER_OFF) ||
-                               (cx->core_state == PWRDM_POWER_OFF))
-                               cx->valid = 0;
+                       cx->valid = 0;
                }
        }
 }
@@ -452,6 +453,18 @@ void omap_init_power_states(void)
        omap3_power_states[OMAP3_STATE_C7].core_state = PWRDM_POWER_OFF;
        omap3_power_states[OMAP3_STATE_C7].flags = CPUIDLE_FLAG_TIME_VALID |
                                CPUIDLE_FLAG_CHECK_BM;
+
+       /*
+        * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot
+        * enable OFF mode in a stable form for previous revisions.
+        * we disable C7 state as a result.
+        */
+       if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) {
+               omap3_power_states[OMAP3_STATE_C7].valid = 0;
+               cpuidle_params_table[OMAP3_STATE_C7].valid = 0;
+               WARN_ONCE(1, "%s: core off state C7 disabled due to i583\n",
+                               __func__);
+       }
 }
 
 struct cpuidle_driver omap3_idle_driver = {
@@ -504,7 +517,10 @@ int __init omap3_idle_init(void)
                return -EINVAL;
        dev->state_count = count;
 
-       omap3_cpuidle_update_states();
+       if (enable_off_mode)
+               omap3_cpuidle_update_states(PWRDM_POWER_OFF, PWRDM_POWER_OFF);
+       else
+               omap3_cpuidle_update_states(PWRDM_POWER_RET, PWRDM_POWER_RET);
 
        if (cpuidle_register_device(dev)) {
                printk(KERN_ERR "%s: CPUidle register device failed\n",