Re: [PATCH 5/5] ARM: OMAP2+: Update gpmc and nand DT binding documentation

From: Franklin S Cooper Jr.
Date: Thu Oct 15 2015 - 13:15:53 EST




On 10/14/2015 06:50 AM, Roger Quadros wrote:
> On 13/10/15 04:38, Franklin S Cooper Jr wrote:
>> Add additional details to the gpmc and nand documentation to clarify
>> what is needed to enable nand dma prefetch.
>>
>> Signed-off-by: Franklin S Cooper Jr <fcooper@xxxxxx>
>> ---
>> Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt | 7 ++++++-
>> Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 2 ++
>> 2 files changed, 8 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt b/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
>> index 704be93..b1e2802 100644
>> --- a/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
>> +++ b/Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
>> @@ -33,6 +33,10 @@ Required properties:
>> As this will change in the future, filling correct
>> values here is a requirement.
>>
>> +GPMC DMA information. Required only when GPMC nand prefetch is enabled.
>> + - dmas GPMC nand prefetch dma channel
> s/nand/NAND
>
>> + - dma-names DMA channel name use as a reference within the Nand driver
> s/Nand/NAND
>
> This is inevitably going to be "rxtx". So why not say that it should be "rxtx"
I'll fix all three of these
>
> Should these bindings go in bindings/mtd/gpmc-nand.txt instead?
>
>> +
>> Timing properties for child nodes. All are optional and default to 0.
>>
>> - gpmc,sync-clk-ps: Minimum clock period for synchronous mode, in picoseconds
>> @@ -119,7 +123,8 @@ Example for an AM33xx board:
>> ti,hwmods = "gpmc";
>> reg = <0x50000000 0x2000>;
>> interrupts = <100>;
>> -
>> + dmas = <&edma 52>;
>> + dma-names = "rxtx";
> Why not define these in the NAND node instead of gpmc node?
Since we decided that the dma entry will stay in the GPMC node I'll leave these as is.
>
>> 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 253e6de..4b0c240 100644
>> --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
>> +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
>> @@ -61,6 +61,8 @@ Example for an AM33xx board:
>> ti,hwmods = "gpmc";
>> reg = <0x50000000 0x36c>;
>> interrupts = <100>;
>> + dmas = <&edma 52>;
>> + dma-names = "rxtx";
>> gpmc,num-cs = <8>;
>> gpmc,num-waitpins = <2>;
>> #address-cells = <2>;
>>
> cheers,
> -roger

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