[PATCH 1/2] dt-bindings: rockchip-dw-mshc: add optional rockchip,default-num-phases
shawn.lin at rock-chips.com
Tue May 2 00:03:03 PDT 2017
在 2017/4/28 21:34, Rob Herring 写道:
> On Wed, Apr 19, 2017 at 05:00:33PM +0800, Shawn Lin wrote:
>> By default, dw_mmc-rockchip will execute tuning for each degree.
>> So we won't miss every point of the good sample windows. However,
>> probably the phases are linear inside the good sample window.
>> Actually we don't need to do tuning for each degree so that we could
>> save some time, for instance, probe the driver or resume from S3.
>> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
>> Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt | 4 ++++
>> 1 file changed, 4 insertions(+)
>> diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
>> index 520d61d..ea47ec0 100644
>> --- a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
>> +++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
>> @@ -31,6 +31,10 @@ Optional Properties:
>> probing, low speeds or in case where all phases work at tuning time.
>> If not specified 0 deg will be used.
>> +* rockchip,default-num-phases: The default number of times that the host
>> + execute tuning when needed. If not specified, the host will do tuning
>> + for 360 times, namely tuning for each degree.
> How is it default when you specify it? I would think default here is
I don't get your point here. Do you mean the name, default-num-phases,
isn't correct, so I need another one?
> Should this be common?
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