charger: replace charger_get_input_current uses

Replace them with charger_get_input_current_limit which is
aligned to the old usage, no funcional changes.

Keep OCPC charger_get_input_current uses as was, since it
is its intended use.

Also, implement
- isl923x_get_input_current, raa48900_get_input_current
- sm5803_get_input_current_limit

BUG=b:171853295
TEST=1. grep "\<charger_get_input_current\>"; only ocpc uses the function.
     2. make buildall
     3. test with CL:2569086 on waddledee(sm5803), waddledoo(raa489000),
        hayato(isl923x), pompom(isl923x), and ensure the output
        of `curr 0|1` equalts to the report of power meter.
BRANCH=none

Change-Id: I71aca33cbc88dda9b0238cb71b1609665a9c9a7f
Signed-off-by: Eric Yilun Lin <yllin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2569085
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/include/charger.h b/include/charger.h
index 3806d3d91f..4f64b8f5c2 100644
--- a/include/charger.h
+++ b/include/charger.h
@@ -285,10 +285,17 @@ enum ec_error_list charger_set_input_current_limit(int chgnum,
  */
 enum ec_error_list charger_get_input_current_limit(int chgnum,
 						   int *input_current);
-/*
+
+/**
  * Get actual input current value.
+ *
  * Actual input current may be less than the desired input current set
  * due to current ratings of the wall adapter.
+ *
+ * @param chgnum		charger IC index
+ * @param input_current		The input current in mA.
+ *
+ * @return EC_SUCCESS on success, an error otherwise.
  */
 enum ec_error_list charger_get_input_current(int chgnum, int *input_current);