[PATCH] [POWERPC] Add docs for Freescale DMA & DMA channel device tree nodes
galak at kernel.crashing.org
Wed Jan 23 09:02:22 EST 2008
On Jan 22, 2008, at 3:30 PM, Timur Tabi wrote:
> Kumar Gala wrote:
>> Signed-off-by: Zhang Wei <wei.zhang at freescale.com>
>> Signed-off-by: Ebony Zhu <ebony.zhu at freescale.com>
>> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
>> Guys please review and make sure I got all your previous comments
>> up. I've added cell-index. and the examples should represent real
>> Documentation/powerpc/booting-without-of.txt | 128 ++++++++++++++++
>> 1 files changed, 128 insertions(+), 0 deletions(-)
>> diff --git a/Documentation/powerpc/booting-without-of.txt b/
>> index da98154..3584c33 100644
>> --- a/Documentation/powerpc/booting-without-of.txt
>> +++ b/Documentation/powerpc/booting-without-of.txt
>> @@ -2615,6 +2615,134 @@ platforms are moved over to use the
>> flattened-device-tree model.
>> - clock-frequency : The frequency of the input clock, which
>> comes from an on-board dedicated
>> + * Freescale 83xx DMA Controller
>> + Freescale PowerPC 83xx have on chip general purpose DMA
>> + Required properties:
>> + - compatible : compatible list, contains 2 entries,
>> first is
>> + "fsl,CHIP-dma", where CHIP is the processor
>> + (mpc8349, mpc8360, etc.) and the second is
>> + "fsl,elo-dma"
>> + - reg : <registers mapping for DMA general
>> status reg>
>> + - ranges : Should be defined as specified in 1) to describe
>> + DMA controller channels.
> What does "Should be defined as specified in 1)" mean?
Its referring to section 1 of the doc on ranges. Other nodes use this
description for ranges. (soc, muram)
>> + - cell-index : controller index. 0 for controller @
> This should be more generic. I believe for each of our SoCs, we
> designation one DMA controller to be "DMA Controller 1", and that
> one should have a cell-index of "0".
Ok, on 83xx that controller is always at offset 0x8100.
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