regulator: Display actual settings with constraints

When voltage or current constraints are either missing or specify
a range display the actual setting along with the constraints if
we can. This can aid debugging of configuration problems.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 31 insertions, 13 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1848a3f0980e..d3be67e18519 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -641,25 +641,43 @@ static void print_constraints(struct regulator_dev *rdev)
 {
         struct regulation_constraints *constraints = rdev->constraints;
         char buf[80];
-        int count;
+        int count = 0;
+        int ret;
 
-        if (rdev->desc->type == REGULATOR_VOLTAGE) {
+        if (constraints->min_uV && constraints->max_uV) {
                 if (constraints->min_uV == constraints->max_uV)
-                        count = sprintf(buf, "%d mV ",
-                                        constraints->min_uV / 1000);
+                        count += sprintf(buf + count, "%d mV ",
+                                         constraints->min_uV / 1000);
                 else
-                        count = sprintf(buf, "%d <--> %d mV ",
-                                        constraints->min_uV / 1000,
-                                        constraints->max_uV / 1000);
-        } else {
+                        count += sprintf(buf + count, "%d <--> %d mV ",
+                                         constraints->min_uV / 1000,
+                                         constraints->max_uV / 1000);
+        }
+
+        if (!constraints->min_uV ||
+            constraints->min_uV != constraints->max_uV) {
+                ret = _regulator_get_voltage(rdev);
+                if (ret > 0)
+                        count += sprintf(buf + count, "at %d mV ", ret / 1000);
+        }
+
+        if (constraints->min_uA && constraints->max_uA) {
                 if (constraints->min_uA == constraints->max_uA)
-                        count = sprintf(buf, "%d mA ",
-                                        constraints->min_uA / 1000);
+                        count += sprintf(buf + count, "%d mA ",
+                                         constraints->min_uA / 1000);
                 else
-                        count = sprintf(buf, "%d <--> %d mA ",
-                                        constraints->min_uA / 1000,
-                                        constraints->max_uA / 1000);
+                        count += sprintf(buf + count, "%d <--> %d mA ",
+                                         constraints->min_uA / 1000,
+                                         constraints->max_uA / 1000);
         }
+
+        if (!constraints->min_uA ||
+            constraints->min_uA != constraints->max_uA) {
+                ret = _regulator_get_current_limit(rdev);
+                if (ret > 0)
+                        count += sprintf(buf + count, "at %d uA ", ret / 1000);
+        }
+
         if (constraints->valid_modes_mask & REGULATOR_MODE_FAST)
                 count += sprintf(buf + count, "fast ");
         if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL)