linux-kernel - Re: [PATCH v5 2/5] arm64: dts: imx8mm: Add pinctrl config definitions

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Message-ID: <aXOQ1JggvrDKbaez@lizhi-Precision-Tower-5810>
Date: Fri, 23 Jan 2026 10:16:36 -0500
From: Frank Li <Frank.li@....com>
To: maudspierings@...ontroll.com
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Matti Vaittinen <mazziesaccount@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 2/5] arm64: dts: imx8mm: Add pinctrl config definitions

On Fri, Jan 23, 2026 at 09:30:29AM +0100, Maud Spierings via B4 Relay wrote:
> From: Maud Spierings <maudspierings@...ontroll.com>
>
> Currently to configure each IOMUXC_SW_PAD_CTL_PAD the raw value of this
> register is written in the dts, these values are not obvious. Add defines
> which describe the fields of this register which can be or-ed together to
> produce readable settings.
>
> Signed-off-by: Maud Spierings <maudspierings@...ontroll.com>
> ---

Reviewed-by: Frank Li <Frank.Li@....com>
>  arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h | 33 ++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h b/arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h
> index b1f11098d248..31557b7b9ccc 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h
> @@ -6,6 +6,39 @@
>  #ifndef __DTS_IMX8MM_PINFUNC_H
>  #define __DTS_IMX8MM_PINFUNC_H
>
> +/* Drive Strength */
> +#define MX8MM_DSE_X1		0x0
> +#define MX8MM_DSE_X2		0x4
> +#define MX8MM_DSE_X4		0x2
> +#define MX8MM_DSE_X6		0x6
> +
> +/* Slew Rate */
> +#define MX8MM_FSEL_FAST		0x10
> +#define MX8MM_FSEL_SLOW		0x0
> +
> +/* Open Drain */
> +#define MX8MM_ODE_ENABLE	0x20
> +#define MX8MM_ODE_DISABLE	0x0
> +
> +#define MX8MM_PULL_DOWN		0x0
> +#define MX8MM_PULL_UP		0x40
> +
> +/* Hysteresis */
> +#define MX8MM_HYS_CMOS		0x0
> +#define MX8MM_HYS_SCHMITT	0x80
> +
> +#define MX8MM_PULL_ENABLE	0x100
> +#define MX8MM_PULL_DISABLE	0x0
> +
> +/* SION force input mode */
> +#define MX8MM_SION		0x40000000
> +
> +/* long defaults */
> +#define MX8MM_USDHC_DATA_DEFAULT (MX8MM_FSEL_FAST | MX8MM_PULL_UP | \
> +				  MX8MM_HYS_SCHMITT | MX8MM_PULL_ENABLE)
> +#define MX8MM_I2C_DEFAULT (MX8MM_DSE_X6 | MX8MM_PULL_UP | MX8MM_HYS_SCHMITT | \
> +			   MX8MM_PULL_ENABLE | MX8MM_SION)
> +
>  /*
>   * The pin function ID is a tuple of
>   * <mux_reg conf_reg input_reg mux_mode input_val>
>
> --
> 2.52.0
>
>