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

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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>
This commit is contained in:
Cooper Jr., Franklin 2016-05-04 13:34:44 -05:00 committed by Boris Brezillon
parent aa7abd312c
commit cabfeaa678
2 changed files with 7 additions and 2 deletions
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7
Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
View File

@ -46,6 +46,10 @@ Required properties:
0 maps to GPMC_WAIT0 pin. 0 maps to GPMC_WAIT0 pin.
- gpio-cells: Must be set to 2 - 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. Timing properties for child nodes. All are optional and default to 0.
- gpmc,sync-clk-ps: Minimum clock period for synchronous mode, in picoseconds - gpmc,sync-clk-ps: Minimum clock period for synchronous mode, in picoseconds
@ -137,7 +141,8 @@ Example for an AM33xx board:
ti,hwmods = "gpmc"; ti,hwmods = "gpmc";
reg = <0x50000000 0x2000>; reg = <0x50000000 0x2000>;
interrupts = <100>; interrupts = <100>;
dmas = <&edma 52 0>;
dma-names = "rxtx";
gpmc,num-cs = <8>; gpmc,num-cs = <8>;
gpmc,num-waitpins = <2>; gpmc,num-waitpins = <2>;
#address-cells = <2>; #address-cells = <2>;

2
Documentation/devicetree/bindings/mtd/gpmc-nand.txt
View File

@ -39,7 +39,7 @@ Optional properties:
"prefetch-polled" Prefetch polled mode (default) "prefetch-polled" Prefetch polled mode (default)
"polled" Polled mode, without prefetch "polled" Polled mode, without prefetch
"prefetch-dma" Prefetch enabled sDMA mode "prefetch-dma" Prefetch enabled DMA mode
"prefetch-irq" Prefetch enabled irq mode "prefetch-irq" Prefetch enabled irq mode
- elm_id: <deprecated> use "ti,elm-id" instead - elm_id: <deprecated> use "ti,elm-id" instead