1 files changed, 85 insertions, 25 deletions

diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index ef71fdd40fc4..5164d587ef52 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -1,7 +1,7 @@
 /*
  * OMAP powerdomain control
  *
- * Copyright (C) 2007-2008 Texas Instruments, Inc.
+ * Copyright (C) 2007-2008, 2011 Texas Instruments, Inc.
  * Copyright (C) 2007-2011 Nokia Corporation
  *
  * Written by Paul Walmsley
@@ -77,13 +77,11 @@ static struct powerdomain *_pwrdm_lookup(const char *name)
 static int _pwrdm_register(struct powerdomain *pwrdm)
 {
         int i;
+        struct voltagedomain *voltdm;
 
         if (!pwrdm || !pwrdm->name)
                 return -EINVAL;
 
-        if (!omap_chip_is(pwrdm->omap_chip))
-                return -EINVAL;
-
         if (cpu_is_omap44xx() &&
             pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) {
                 pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n",
@@ -94,6 +92,16 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
         if (_pwrdm_lookup(pwrdm->name))
                 return -EEXIST;
 
+        voltdm = voltdm_lookup(pwrdm->voltdm.name);
+        if (!voltdm) {
+                pr_err("powerdomain: %s: voltagedomain %s does not exist\n",
+                       pwrdm->name, pwrdm->voltdm.name);
+                return -EINVAL;
+        }
+        pwrdm->voltdm.ptr = voltdm;
+        INIT_LIST_HEAD(&pwrdm->voltdm_node);
+        voltdm_add_pwrdm(voltdm, pwrdm);
+
         list_add(&pwrdm->node, &pwrdm_list);
 
         /* Initialize the powerdomain's state counter */
@@ -194,36 +202,76 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused)
 /* Public functions */
 
 /**
- * pwrdm_init - set up the powerdomain layer
- * @pwrdms: array of struct powerdomain pointers to register
- * @custom_funcs: func pointers for arch specific implementations
+ * pwrdm_register_platform_funcs - register powerdomain implementation fns
+ * @po: func pointers for arch specific implementations
  *
- * Loop through the array of powerdomains @pwrdms, registering all
- * that are available on the current CPU.  Also, program all
- * powerdomain target state as ON; this is to prevent domains from
- * hitting low power states (if bootloader has target states set to
- * something other than ON) and potentially even losing context while
- * PM is not fully initialized.  The PM late init code can then program
- * the desired target state for all the power domains.  No return
- * value.
+ * Register the list of function pointers used to implement the
+ * powerdomain functions on different OMAP SoCs.  Should be called
+ * before any other pwrdm_register*() function.  Returns -EINVAL if
+ * @po is null, -EEXIST if platform functions have already been
+ * registered, or 0 upon success.
  */
-void pwrdm_init(struct powerdomain **pwrdms, struct pwrdm_ops *custom_funcs)
+int pwrdm_register_platform_funcs(struct pwrdm_ops *po)
+{
+        if (!po)
+                return -EINVAL;
+
+        if (arch_pwrdm)
+                return -EEXIST;
+
+        arch_pwrdm = po;
+
+        return 0;
+}
+
+/**
+ * pwrdm_register_pwrdms - register SoC powerdomains
+ * @ps: pointer to an array of struct powerdomain to register
+ *
+ * Register the powerdomains available on a particular OMAP SoC.  Must
+ * be called after pwrdm_register_platform_funcs().  May be called
+ * multiple times.  Returns -EACCES if called before
+ * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is
+ * null; or 0 upon success.
+ */
+int pwrdm_register_pwrdms(struct powerdomain **ps)
 {
         struct powerdomain **p = NULL;
-        struct powerdomain *temp_p;
 
-        if (!custom_funcs)
-                WARN(1, "powerdomain: No custom pwrdm functions registered\n");
-        else
-                arch_pwrdm = custom_funcs;
+        if (!arch_pwrdm)
+                return -EEXIST;
 
-        if (pwrdms) {
-                for (p = pwrdms; *p; p++)
-                        _pwrdm_register(*p);
-        }
+        if (!ps)
+                return -EINVAL;
+
+        for (p = ps; *p; p++)
+                _pwrdm_register(*p);
+
+        return 0;
+}
+
+/**
+ * pwrdm_complete_init - set up the powerdomain layer
+ *
+ * Do whatever is necessary to initialize registered powerdomains and
+ * powerdomain code.  Currently, this programs the next power state
+ * for each powerdomain to ON.  This prevents powerdomains from
+ * unexpectedly losing context or entering high wakeup latency modes
+ * with non-power-management-enabled kernels.  Must be called after
+ * pwrdm_register_pwrdms().  Returns -EACCES if called before
+ * pwrdm_register_pwrdms(), or 0 upon success.
+ */
+int pwrdm_complete_init(void)
+{
+        struct powerdomain *temp_p;
+
+        if (list_empty(&pwrdm_list))
+                return -EACCES;
 
         list_for_each_entry(temp_p, &pwrdm_list, node)
                 pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON);
+
+        return 0;
 }
 
 /**
@@ -390,6 +438,18 @@ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
 }
 
 /**
+ * pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in
+ * @pwrdm: struct powerdomain *
+ *
+ * Return a pointer to the struct voltageomain that the specified powerdomain
+ * @pwrdm exists in.
+ */
+struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm)
+{
+        return pwrdm->voltdm.ptr;
+}
+
+/**
  * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
  * @pwrdm: struct powerdomain *
  *