From: "Cooper Jr., Franklin" <fcoo...@ti.com>
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 <fcoo...@ti.com>
Acked-by: Rob Herring <r...@kernel.org>
---
Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt | 7 ++++++-
Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 2 +-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
b/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
index 21055e2..c1359f4 100644
--- 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
--- 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
--
2.7.0
