Re: [PATCH v1 6/7] ASoC: dt-bindings: rockchip: pdm: Document property 'rockchip,path-map'【请注意，邮件由robherring2 at gmail.com代发】

[sugar zhang]

Hi Rob,

On 2021/8/25 0:58, Rob Herring wrote:
> On Tue, Aug 24, 2021 at 03:54:15PM +0800, Sugar Zhang wrote:
>> This is an optional property to describe data path mapping.
>>
>> Signed-off-by: Sugar Zhang <sugar.zhang at rock-chips.com>
>> ---
>>
>>   Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 16 ++++++++++++++++
>>   1 file changed, 16 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
>> index 54d94438..b2d7e47 100644
>> --- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
>> +++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
>> @@ -24,6 +24,22 @@ Required properties:
>>   	     pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
>>   	     for details of the property values.
>>   
>> +Optional properties:
>> +- rockchip,path-map: This is a variable length array, that shows the mapping
> The schema says this is a fixed length array.

Actually, it varies depends on different controller or application. 
considering the situation:

for 4 channel, we use path0/1, and hw wired to sdi1/3. we can map them 
to path0/1 as follows:

rockchip,path-map = <1 3>;

>
>> +  of SDIx to PATHx. By default, they are one-to-one mapping as follows:
>> +
>> +   path0 <-- sdi0
>> +   path1 <-- sdi1
>> +   path2 <-- sdi2
>> +   path3 <-- sdi3
>> +
>> +  e.g. "rockchip,path-map = <3 2 1 0>" means the mapping as follows:
>> +
>> +   path0 <-- sdi3
>> +   path1 <-- sdi2
>> +   path2 <-- sdi1
>> +   path3 <-- sdi0
>> +
>>   Example for rk3328 PDM controller:
>>   
>>   pdm: pdm at ff040000 {
>> -- 
>> 2.7.4
>>
>>
>>
>>
>
>
-- 
Best Regards!
张学广/Sugar
瑞芯微电子股份有限公司
Rockchip Electronics Co., Ltd.