gpio: samsung: Clarify gpio powerdown-settings values

Clarify the 0 value for powerdown-settings to indicate it preserves
previously set values.

BUG=None
TEST=Kernel still compiles

Change-Id: I1b3373bad1b5f687cfa08060e5ab388610419639
Signed-off-by: Jonathan Kliegman <kliegs@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/28847
Reviewed-by: Doug Anderson <dianders@chromium.org>

diff --git a/Documentation/devicetree/bindings/gpio/gpio-samsung.txt b/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
index e96d9fc..097891c 100644 (file)
--- a/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
@@ -32,7 +32,7 @@ Required properties:
 - powerdown-settings: Configure GPIO behavior on suspend.
   Array of u32 with ngpio elements.  This properties existence
   indicates the chip supports CONPDN and PUDPDN
-     0 - Use existing
+     0 - Do not modify - preserve previously set (firmware) value
      1 - Float (input, no PU/PD)
      2 - Pull up (input)
      3 - Pull down (input)