On 08/12/2023 10:03, TY_Chang[張子逸] wrote:
>
> The DTS use in our platform follows this structure:
>
> soc@0 {
> rbus: rbus@98000000 {
> ...
> iso: syscon@7000 {
> ...
> gpio: gpio@100 {
> compatible = "realtek,rtd1319d-iso-gpio";
> reg = <0x100 0x100>,
> <0x000 0x0b0>;
> interrupt-parent = <&iso_irq_mux>;
> interrupts = <19>, <20>;
> gpio-ranges = <&pinctrl 0 0 82>;
> gpio-controller;
> #gpio-cells = <2>;
> };
> };
> };
> };
>
> The base address for the GPIO controller is 0x98007100. The second line of
> 'reg' refers to the GPIO interrupt status registers, which are distributed
> within the range of 0x98007000 to 0x980070AF.
Ah, ok.
> Would it be advisable to fetch the
> syscon from parent node(iso: syscon@7000) to handle the GPIO interrupt status
> registers?
If these are GPIO interrupts then current description is fine.
>
>> It is, btw, 0x0, not 0x000. The same for 0x0b0 -> 0xb0, unless you want to pad
>> to full word.
>>
Best regards,
Krzysztof
