If the ac-detect gpio does not support interrupts, provide a fallback
to poll the gpio at a configurable interval.

Signed-off-by: Peter Rosin <redacted>
---
 .../bindings/power/supply/ti,bq24735.txt           |  2 +
 drivers/power/supply/bq24735-charger.c             | 50 +++++++++++++++++++---
 2 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/supply/ti,bq24735.txt b/Documentation/devicetree/bindings/power/supply/ti,bq24735.txt
index 3bf55757ceec..59c4dde589cf 100644
--- a/Documentation/devicetree/bindings/power/supply/ti,bq24735.txt
+++ b/Documentation/devicetree/bindings/power/supply/ti,bq24735.txt

@@ -25,6 +25,8 @@ Optional properties :
  - ti,external-control : Indicates that the charger is configured externally
    and that the host should not attempt to enable/disable charging or set the
    charge voltage/current.
+ - ti,poll-interval-ms : In case there is no interrupts specified, poll AC
+   presense on the ti,ac-detect-gpios GPIO with this interval.