On 08/07/2022 17:32, Marek Vasut wrote: > 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. I don't have the hardware manual to know what is it exactly. Some device which has its own bindings and fsl,imx8mp-media-blk-ctrl compatible. You already received hint what should you do with that device.... "What I meant, is that probably you should populate children from the driver instead of adding simple-mfd compatible." Best regards, Krzysztof
