[PATCH v8 03/10] arm64: dts: s32g: change pinctrl node into the new mfd node

[Linus Walleij]

Hi Khristine,

On Tue, Jan 20, 2026 at 12:59 PM Khristine Andreea Barbulescu
<khristineandreea.barbulescu at oss.nxp.com> wrote:

> From: Andrei Stefanescu <andrei.stefanescu at oss.nxp.com>
>
> This commit will switch to the new mfd node for representing the SIUL2
> hardware. The old pinctrl binding for SIUL2 will be deprecated in a
> later commit since it doesn't correctly represent the hardware.
>
> SIUL2 is now represented as an mfd device. Move the pinctrl related
> properties inside the new "nxp-siul2" node. The latter one is now used
> to represent the mfd device.
>
> This change came as a result of upstream review in the following series:
> https://lore.kernel.org/linux-gpio/a924bbb6-96ec-40be-9d82-a76b2ab73afd@oss.nxp.com/
> https://lore.kernel.org/all/20240926143122.1385658-3-andrei.stefanescu@oss.nxp.com/
>
> The SIUL2 module has multiple capabilities. It has support for reading
> SoC information, pinctrl and GPIO. All of this functionality is part of
> the same register space. The initial pinctrl driver treated the pinctrl
> functionality as separate from the GPIO one. However, they do rely on
> common registers and a long, detailed and specific register range list
> would be required for pinctrl&GPIO (carving out the necessary memory
> for each function). Moreover, in some cases this wouldn't be enough. For
> example reading a GPIO's direction would require a read of the MSCR
> register corresponding to that pin. This would not be possible in the
> GPIO driver because all of the MSCR registers are referenced by the
> pinctrl driver.
>
> Signed-off-by: Andrei Stefanescu <andrei.stefanescu at oss.nxp.com>
> Signed-off-by: Khristine Andreea Barbulescu <khristineandreea.barbulescu at oss.nxp.com>

OK this makes sense.
Acked-by: Linus Walleij <linusw at kernel.org>

Yours,
Linus Walleij