ARM: OMAP2+: Update GPMC and NAND DT binding documentation

Add additional details to the GPMC NAND documentation to clarify
what is needed to enable NAND DMA prefetch.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt b/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
index 21055e2..c1359f4 100644 (file)
--- a/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
@@ -46,6 +46,10 @@ Required properties:
                        0 maps to GPMC_WAIT0 pin.
  - gpio-cells:         Must be set to 2
 
+Required properties when using NAND prefetch dma:
+ - dmas                        GPMC NAND prefetch dma channel
+ - dma-names           Must be set to "rxtx"
+
 Timing properties for child nodes. All are optional and default to 0.
 
  - gpmc,sync-clk-ps:   Minimum clock period for synchronous mode, in picoseconds
@@ -137,7 +141,8 @@ Example for an AM33xx board:
                ti,hwmods = "gpmc";
                reg = <0x50000000 0x2000>;
                interrupts = <100>;
-
+               dmas = <&edma 52 0>;
+               dma-names = "rxtx";
                gpmc,num-cs = <8>;
                gpmc,num-waitpins = <2>;
                #address-cells = <2>;

diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
index 3ee7e20..174f68c 100644 (file)
--- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
@@ -39,7 +39,7 @@ Optional properties:
 
                "prefetch-polled"       Prefetch polled mode (default)
                "polled"                Polled mode, without prefetch
-               "prefetch-dma"          Prefetch enabled sDMA mode
+               "prefetch-dma"          Prefetch enabled DMA mode
                "prefetch-irq"          Prefetch enabled irq mode
 
  - elm_id:     <deprecated> use "ti,elm-id" instead