1 files changed, 48 insertions, 13 deletions

diff --git a/arch/arm/plat-omap/omap-pm-noop.c b/arch/arm/plat-omap/omap-pm-noop.c
index 186bca82cfab..e129ce80c53b 100644
--- a/arch/arm/plat-omap/omap-pm-noop.c
+++ b/arch/arm/plat-omap/omap-pm-noop.c
@@ -34,11 +34,11 @@ struct omap_opp *l3_opps;
  * Device-driver-originated constraints (via board-*.c files)
  */
 
-void omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
+int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
 {
         if (!dev || t < -1) {
-                WARN_ON(1);
-                return;
+                WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+                return -EINVAL;
         };
 
         if (t == -1)
@@ -58,14 +58,16 @@ void omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
          *
          * TI CDP code can call constraint_set here.
          */
+
+        return 0;
 }
 
-void omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
+int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
 {
         if (!dev || (agent_id != OCP_INITIATOR_AGENT &&
             agent_id != OCP_TARGET_AGENT)) {
-                WARN_ON(1);
-                return;
+                WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+                return -EINVAL;
         };
 
         if (r == 0)
@@ -83,13 +85,16 @@ void omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
          *
          * TI CDP code can call constraint_set here on the VDD2 OPP.
          */
+
+        return 0;
 }
 
-void omap_pm_set_max_dev_wakeup_lat(struct device *dev, long t)
+int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
+                                   long t)
 {
-        if (!dev || t < -1) {
-                WARN_ON(1);
-                return;
+        if (!req_dev || !dev || t < -1) {
+                WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+                return -EINVAL;
         };
 
         if (t == -1)
@@ -111,13 +116,15 @@ void omap_pm_set_max_dev_wakeup_lat(struct device *dev, long t)
          *
          * TI CDP code can call constraint_set here.
          */
+
+        return 0;
 }
 
-void omap_pm_set_max_sdma_lat(struct device *dev, long t)
+int omap_pm_set_max_sdma_lat(struct device *dev, long t)
 {
         if (!dev || t < -1) {
-                WARN_ON(1);
-                return;
+                WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+                return -EINVAL;
         };
 
         if (t == -1)
@@ -139,8 +146,36 @@ void omap_pm_set_max_sdma_lat(struct device *dev, long t)
          * TI CDP code can call constraint_set here.
          */
 
+        return 0;
 }
 
+int omap_pm_set_min_clk_rate(struct device *dev, struct clk *c, long r)
+{
+        if (!dev || !c || r < 0) {
+                WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+                return -EINVAL;
+        }
+
+        if (r == 0)
+                pr_debug("OMAP PM: remove min clk rate constraint: "
+                         "dev %s\n", dev_name(dev));
+        else
+                pr_debug("OMAP PM: add min clk rate constraint: "
+                         "dev %s, rate = %ld Hz\n", dev_name(dev), r);
+
+        /*
+         * Code in a real implementation should keep track of these
+         * constraints on the clock, and determine the highest minimum
+         * clock rate.  It should iterate over each OPP and determine
+         * whether the OPP will result in a clock rate that would
+         * satisfy this constraint (and any other PM constraint in effect
+         * at that time).  Once it finds the lowest-voltage OPP that
+         * meets those conditions, it should switch to it, or return
+         * an error if the code is not capable of doing so.
+         */
+
+        return 0;
+}
 
 /*
  * DSP Bridge-specific constraints