OMAP2+: powerdomain: add voltage domain lookup during register

When a powerdomain is registered, lookup the voltage domain by name
and keep a pointer to the containing voltagedomain in the powerdomain
structure.

Modeled after similar method between powerdomain and clockdomain layers.

Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 896cb4c5eb1a..984457d612b7 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -77,6 +77,7 @@ 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;
@@ -91,6 +92,14 @@ 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;
+
         list_add(&pwrdm->node, &pwrdm_list);
 
         /* Initialize the powerdomain's state counter */
@@ -427,6 +436,18 @@ 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 *
  *