mtd: atmel_nand: Support variable RB_EDGE interrupts

The NFC controller used to accelerate the NAND transfers on SAMA5 chips
can use either RB_EDGE0 or RB_EDGE3 as its ready/busy interrupt bit.

Use the controller's compatible string to select the correct bit.

For the binding:
Acked-by: Rob Herring <robh@kernel.org>

Reviewed-by: Wenyou Yang <Wenyou.yang@atmel.com>
Tested-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/mtd/atmel-nand.txt b/Documentation/devicetree/bindings/mtd/atmel-nand.txt
index 7d4c8eb..89b0db9 100644
--- a/Documentation/devicetree/bindings/mtd/atmel-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/atmel-nand.txt
@@ -34,7 +34,7 @@ Optional properties:
 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
 - Nand Flash Controller(NFC) is a slave driver under Atmel nand flash
   - Required properties:
-    - compatible : "atmel,sama5d3-nfc".
+    - compatible : "atmel,sama5d3-nfc" or "atmel,sama5d4-nfc".
     - reg : should specify the address and size used for NFC command registers,
             NFC registers and NFC Sram. NFC Sram address and size can be absent
             if don't want to use it.