On 7/4/22 10:00, Krzysztof Kozlowski wrote:
On 01/07/2022 10:06, Marek Vasut wrote:
In the local patch I have to imx8mp.dtsi , the simple-mfd had to be
added for the ldb bridge child node to bind.
'simple-mfd' is saying the child has 0 dependence on the parent. IMO,
'syscon' contradicts that, but that's an all to common pattern. You are
saying all the clocks (or any other resources) in the parent can be off
and the LDB bridge is still functional.
The bridge itself should work even if the block control is clocked off.
The block controller apb (register) clock have to be enabled only when
accessing these two LDB registers, which should be handled by runtime
PM. Or what am I missing here ?
If I understand correctly, you need the device's APB clocks to be
enabled to use the child device? You have a dependency between child and
parent, so it is not a simple-mfd.
OK, then ... what is it ? Some sort of hint would be helpful.
