Re: [v4 1/5] dt-bindings: mfd: Add aspeed pwm-tach binding

[Billy Tsai]

On 2022/12/9, 3:48 PM, "Krzysztof Kozlowski" <krzysztof.kozlowski@xxxxxxxxxx <mailto:krzysztof.kozlowski@xxxxxxxxxx>> wrote:


  On 09/12/2022 01:54, Billy Tsai wrote:
  > > > > However I am surprised to see such change, so I have no clue why this
  > > > > was done.
  > > 
  > > > Actually now I see it was like that in previous patch, I just missed it
  > > > during previous review. Anyway this must be fixed.
  > > 
  > > I have two module (PWM and TACH) but share with the same base address,
  > > The PWM will use the offset (N*0x10) + 0x0 and 0x04.
  > > The TACH will use the offset (N*0x10) + 0x8 and 0x0c.
  > > The range of the N is 0~15.
  > > Can you give me some advice to fix this problem without using simple-mfd?


  > Use regular driver which populates children.

I think that my scenario meets the definition in mfd.txt: 
- A range of memory registers containing "miscellaneous system registers" also
  known as a system controller "syscon" or any other memory range containing a
  mix of unrelated hardware devices.
Can you tell me the considerations for not using simple-mfd?

Thanks

Best Regards, 
Billy Tsai