[PATCH v2 2/5] arm64: dts: imx8mm: Add pinctrl config definitions

Maud Spierings via B4 Relay
2025-10-22T07:22:45Z

From: Maud Spierings <maudspierings@gocontroll.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@gocontroll.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 b1f11098d248e..31557b7b9ccc1 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>

--
2.51.1