[PATCH 1/4] regulator: core: If consumers don't call regulator_set_load() assume max

[Douglas Anderson]

Not all regulator consumers call regulator_set_load().  On some
regulators (like on RPMh-regulator) this could be bad since the
regulator framework will treat this as if consumer needs no load.
It's much better to assume that a dumb client needs the maximum
possible load so we get correctness first.

Signed-off-by: Douglas Anderson <diand...@chromium.org>
---

 drivers/regulator/core.c     | 10 +++++++++-
 drivers/regulator/internal.h |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 6ed568b96c0e..a4da68775b49 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -732,6 +732,7 @@ static int drms_uA_update(struct regulator_dev *rdev)
        struct regulator *sibling;
        int current_uA = 0, output_uV, input_uV, err;
        unsigned int mode;
+       bool any_unset = false;
 
        lockdep_assert_held_once(&rdev->mutex);
 
@@ -751,11 +752,17 @@ static int drms_uA_update(struct regulator_dev *rdev)
                return -EINVAL;
 
        /* calc total requested load */
-       list_for_each_entry(sibling, &rdev->consumer_list, list)
+       list_for_each_entry(sibling, &rdev->consumer_list, list) {
                current_uA += sibling->uA_load;
+               if (!sibling->uA_load_set)
+                       any_unset = true;
+       }
 
        current_uA += rdev->constraints->system_load;
 
+       if (any_unset)
+               current_uA = INT_MAX;
+
        if (rdev->desc->ops->set_load) {
                /* set the optimum mode for our new total regulator load */
                err = rdev->desc->ops->set_load(rdev, current_uA);
@@ -3631,6 +3638,7 @@ int regulator_set_load(struct regulator *regulator, int 
uA_load)
 
        regulator_lock(rdev);
        regulator->uA_load = uA_load;
+       regulator->uA_load_set = true;
        ret = drms_uA_update(rdev);
        regulator_unlock(rdev);
 
diff --git a/drivers/regulator/internal.h b/drivers/regulator/internal.h
index 943926a156f2..f05c75c59ef4 100644
--- a/drivers/regulator/internal.h
+++ b/drivers/regulator/internal.h
@@ -41,6 +41,7 @@ struct regulator {
        struct list_head list;
        unsigned int always_on:1;
        unsigned int bypass:1;
+       bool uA_load_set;
        int uA_load;
        struct regulator_voltage voltage[REGULATOR_STATES_NUM];
        const char *supply_name;
-- 
2.18.0.865.gffc8e1a3cd6-goog