Re: [PATCH 0/2] arm64: dts: imx8m: Add pinctrl config definitions

[Lucas Stach <l.stach@pengutronix.de>]

Hi Maud,

Am Freitag, dem 14.02.2025 um 16:57 +0100 schrieb Maud Spierings via B4
Relay:
> Up untill now the extra function mux (pull resistor, etc) has been
> defined as a raw hex value, this is difficult to interpret. Add
> definitions for these parts of the pinctrl registers to allow for more
> readable pinctrl definitions in devictree files.
> 
I certainly prefer the short form with the hex value, I find that quite
a bit more readable than very verbose swathes of defines ORed together.
But each to their own.

> At this point the patch is not complete, some pinctrl definitions set
> bit 30 (0x40000000) but according to the reference manual this is a
> reserved field, I currently have no way to identify what the meaning of
> this bit is, I hope someone in this CC may be able to provide an answer
> to this. It will then be fixed in the v2 of this patch.

This is not a mystery bit, it's used by the pinctrl driver to force
enable the input path of the pad (SION). This is defined in the generic
i.MX pinctrl binding, see
Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt

Regards,
Lucas

> 
> It should also be done for the mn/mq but I currently do not have the
> reference manuals for these to verify these fields, though I can only
> assume that they would be the same.
> 
> Signed-off-by: Maud Spierings <maudspierings@gocontroll.com>
> ---
> Maud Spierings (2):
>       arm64: dts: imx8mm: Add pinctrl config definitions
>       arm64: dts: imx8mp: Add pinctrl config definitions
> 
>  arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h | 27 ++++++++++++++++++++++++++
>  arch/arm64/boot/dts/freescale/imx8mp-pinfunc.h | 27 ++++++++++++++++++++++++++
>  2 files changed, 54 insertions(+)
> ---
> base-commit: 0ae0fa3bf0b44c8611d114a9f69985bf451010c3
> change-id: 20250214-pinctrl_defines-237e7db61c6a
> 
> Best regards,