Re: [PATCH RESEND v5 7/8] arm64: dts: Add DTS for Marvell PXA1908 and samsung,coreprimevelte

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Fri, Sep 29, 2023 at 5:42 PM Duje Mihanović <duje.mihanovic@xxxxxxxx> wrote:

> Add DTS for Marvell PXA1908 SoC and Samsung Galaxy Core Prime Value
> Edition LTE, a smartphone based on said SoC.
>
> Signed-off-by: Duje Mihanović <duje.mihanovic@xxxxxxxx>
(...)

> +&pmx {
> +       pinctrl-single,gpio-range = <&range 55 55 0>,
> +                                   <&range 110 32 0>,
> +                                   <&range 52 1 0>;
> +
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&board_pins_1 &board_pins_2 &board_pins_3>;
> +
> +       board_pins_1: pinmux-board-1 {
> +               pinctrl-single,pins = <
> +                       0x160 0
> +                       0x164 0
> +                       0x168 0
> +                       0x16c 0
> +               >;
> +               pinctrl-single,drive-strength = <0x1000 0x1800>;
> +               pinctrl-single,bias-pullup = <0x8000 0x8000 0 0xc000>;
> +               pinctrl-single,bias-pulldown = <0x8000 0x8000 0 0xa000>;
> +               pinctrl-single,input-schmitt = <0 0x30>;
> +               pinctrl-single,input-schmitt-enable = <0x40 0 0x40 0x40>;
> +               pinctrl-single,low-power-mode = <0x288 0x388>;
> +       };
(...)
> +                       pmx: pinmux@1e000 {
> +                               compatible = "pinconf-single";

At least add a new binding for "marvell,pxa1908-padconf"
and use that like this:

compatible = "marvell,pxa1908-padconf", "pinconf-single";

When you use pinctrl-single you get the slightly opaque device
trees as seen above, so it's not something I'd recommend, I'd
rather write my own pin controller.

But it exists, so I can't say you can't use it. Not my choice.
I understand it is convenient.

It is possible to switch later, but only if you have a unique
pin controller compatible so please add that.

Yours,
Linus Walleij