[RFC v2 5/5] riscv: dts: microchip: add pinctrl nodes for mpfs/icicle kit

Conor Dooley
2025-11-27T10:58:19Z

Add pinctrl nodes to PolarFire to demonstrate their use, matching the
default configuration set by the HSS firmware for the Icicle kit's
reference design, as a demonstration of use.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
.../dts/microchip/mpfs-icicle-kit-common.dtsi | 1 -
.../dts/microchip/mpfs-icicle-kit-fabric.dtsi | 63 +++++++
.../boot/dts/microchip/mpfs-pinctrl.dtsi | 167 ++++++++++++++++++
arch/riscv/boot/dts/microchip/mpfs.dtsi | 16 ++
4 files changed, 246 insertions(+), 1 deletion(-)
create mode 100644 arch/riscv/boot/dts/microchip/mpfs-pinctrl.dtsi

diff --git a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-common.dtsi b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-common.dtsi
index b3f61c58e57c..5667805b4b14 100644
--- a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-common.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-common.dtsi
@@ -3,7 +3,6 @@

/dts-v1/;

-#include "mpfs.dtsi"
#include "mpfs-icicle-kit-fabric.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
diff --git a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
index 71f724325578..785176dabcf1 100644
--- a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
@@ -1,6 +1,9 @@
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Copyright (c) 2020-2021 Microchip Technology Inc */

+#include "mpfs.dtsi"
+#include "mpfs-pinctrl.dtsi"
+
/ {
core_pwm0: pwm@40000000 {
compatible = "microchip,corepwm-rtl-v4";
@@ -80,6 +83,16 @@ refclk_ccc: clock-cccref {
};
};

+&can0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&can0_fabric>;
+};
+
+&can1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&ikrd_can1_cfg>;
+};
+
&ccc_nw {
clocks = <&refclk_ccc>, <&refclk_ccc>, <&refclk_ccc>, <&refclk_ccc>,
<&refclk_ccc>, <&refclk_ccc>;
@@ -87,3 +100,53 @@ &ccc_nw {
"dll0_ref", "dll1_ref";
status = "okay";
};
+
+&i2c0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c0_fabric>;
+};
+
+&i2c1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c1_fabric>;
+};
+
+&mmuart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_fabric>;
+};
+
+&mmuart2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart2_fabric>;
+};
+
+&mmuart3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart3_fabric>;
+};
+
+&mmuart4 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart4_fabric>;
+};
+
+&mssio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi1_mssio>, <&can1_mssio>, <&mdio0_mssio>, <&mdio1_mssio>;
+};
+
+&qspi {
+ pinctrl-names = "default";
+ pinctrl-0 = <&qspi_fabric>;
+};
+
+&spi0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi0_fabric>;
+};
+
+&spi1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&ikrd_spi1_cfg>;
+};
diff --git a/arch/riscv/boot/dts/microchip/mpfs-pinctrl.dtsi b/arch/riscv/boot/dts/microchip/mpfs-pinctrl.dtsi
new file mode 100644
index 000000000000..9bd29458cc38
--- /dev/null
+++ b/arch/riscv/boot/dts/microchip/mpfs-pinctrl.dtsi
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+&iomux0 {
+ spi0_fabric: mux-spi0-fabric {
+ function = "spi0";
+ groups = "spi0_fabric";
+ };
+
+ spi0_mssio: mux-spi0-mssio {
+ function = "spi0";
+ groups = "spi0_mssio";
+ };
+
+ spi1_fabric: mux-spi1-fabric {
+ function = "spi1";
+ groups = "spi1_fabric";
+ };
+
+ spi1_mssio: mux-spi1-mssio {
+ function = "spi1";
+ groups = "spi1_mssio";
+ };
+
+ i2c0_fabric: mux-i2c0-fabric {
+ function = "i2c0";
+ groups = "i2c0_fabric";
+ };
+
+ i2c0_mssio: mux-i2c0-mssio {
+ function = "i2c0";
+ groups = "i2c0_mssio";
+ };
+
+ i2c1_fabric: mux-i2c1-fabric {
+ function = "i2c1";
+ groups = "i2c1_fabric";
+ };
+
+ i2c1_mssio: mux-i2c1-mssio {
+ function = "i2c1";
+ groups = "i2c1_mssio";
+ };
+
+ can0_fabric: mux-can0-fabric {
+ function = "can0";
+ groups = "can0_fabric";
+ };
+
+ can0_mssio: mux-can0-mssio {
+ function = "can0";
+ groups = "can0_mssio";
+ };
+
+ can1_fabric: mux-can1-fabric {
+ function = "can1";
+ groups = "can1_fabric";
+ };
+
+ can1_mssio: mux-can1-mssio {
+ function = "can1";
+ groups = "can1_mssio";
+ };
+
+ qspi_fabric: mux-qspi-fabric {
+ function = "qspi";
+ groups = "qspi_fabric";
+ };
+
+ qspi_mssio: mux-qspi-mssio {
+ function = "qspi";
+ groups = "qspi_mssio";
+ };
+
+ uart0_fabric: mux-uart0-fabric {
+ function = "uart0";
+ groups = "uart0_fabric";
+ };
+
+ uart0_mssio: mux-uart0-mssio {
+ function = "uart0";
+ groups = "uart0_mssio";
+ };
+
+ uart1_fabric: mux-uart1-fabric {
+ function = "uart1";
+ groups = "uart1_fabric";
+ };
+
+ uart1_mssio: mux-uart1-mssio {
+ function = "uart1";
+ groups = "uart1_mssio";
+ };
+
+ uart2_fabric: mux-uart2-fabric {
+ function = "uart2";
+ groups = "uart2_fabric";
+ };
+
+ uart2_mssio: mux-uart2-mssio {
+ function = "uart2";
+ groups = "uart2_mssio";
+ };
+
+ uart3_fabric: mux-uart3-fabric {
+ function = "uart3";
+ groups = "uart3_fabric";
+ };
+
+ uart3_mssio: mux-uart3-mssio {
+ function = "uart3";
+ groups = "uart3_mssio";
+ };
+
+ uart4_fabric: mux-uart4-fabric {
+ function = "uart4";
+ groups = "uart4_fabric";
+ };
+
+ uart4_mssio: mux-uart4-mssio {
+ function = "uart4";
+ groups = "uart4_mssio";
+ };
+
+ mdio0_fabric: mux-mdio0-fabric {
+ function = "mdio0";
+ groups = "mdio0_fabric";
+ };
+
+ mdio0_mssio: mux-mdio0-mssio {
+ function = "mdio0";
+ groups = "mdio0_mssio";
+ };
+
+ mdio1_fabric: mux-mdio1-fabric {
+ function = "mdio1";
+ groups = "mdio1_fabric";
+ };
+
+ mdio1_mssio: mux-mdio1-mssio {
+ function = "mdio1";
+ groups = "mdio1_mssio";
+ };
+};
+
+&mssio {
+ ikrd_can1_cfg: ikrd-can1-cfg {
+ can1-pins {
+ pins = <34>, <35>, <36>;
+ function = "spi";
+ bias-pull-up;
+ drive-strength = <8>;
+ microchip,bank-voltage-microvolt = <3300000>;
+ microchip,ibufmd = <0x1>;
+ };
+ };
+
+ ikrd_spi1_cfg: ikrd-spi1-cfg {
+ spi1-pins {
+ pins = <30>, <31>, <32>, <33>;
+ function = "spi";
+ bias-pull-up;
+ drive-strength = <8>;
+ microchip,bank-voltage-microvolt = <3300000>;
+ microchip,ibufmd = <0x1>;
+ };
+ };
+};
diff --git a/arch/riscv/boot/dts/microchip/mpfs.dtsi b/arch/riscv/boot/dts/microchip/mpfs.dtsi
index 5c2963e269b8..0fb94581b6cb 100644
--- a/arch/riscv/boot/dts/microchip/mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs.dtsi
@@ -254,7 +254,23 @@ pdma: dma-controller@3000000 {
mss_top_sysreg: syscon@20002000 {
compatible = "microchip,mpfs-mss-top-sysreg", "syscon", "simple-mfd";
reg = <0x0 0x20002000 0x0 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
#reset-cells = <1>;
+
+ iomux0: pinctrl@200 {
+ compatible = "microchip,mpfs-pinctrl-iomux0";
+ reg = <0x200 0x4>;
+ pinctrl-use-default;
+
+ };
+
+ mssio: pinctrl@204 {
+ compatible = "microchip,mpfs-pinctrl-mssio";
+ reg = <0x204 0x7c>;
+ /* on icicle ref design at least */
+ pinctrl-use-default;
+ };
};

sysreg_scb: syscon@20003000 {
--
2.51.0