linux-kernel - [PATCH] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

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Message-ID: <20260127025740.2601841-1-onlywig@gmail.com>
Date: Tue, 27 Jan 2026 10:57:40 +0800
From: Wig Cheng <onlywig@...il.com>
To: Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	zaq14760@...il.com,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Wig Cheng <onlywig@...il.com>
Subject: [PATCH] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

Add device tree overlay to support the MayQueen PixPaper e-paper display
on the NXP i.MX93 FRDM board. The display is connected via LPSPI3
interface and uses GPIO pins for reset, busy and DC control.

The overlay configures:
    - LPSPI3 pinmux for SPI communication (MOSI, MISO, CLK, CE0)
    - PixPaper display device with proper GPIO assignments
    - SPI frequency set to 5MHz for stable operation

This enables support for the Open-EP Community pixpaper-213-c module on
the NXP i.MX93 platform.

Signed-off-by: Wig Cheng <onlywig@...il.com>
---
 arch/arm64/boot/dts/freescale/Makefile        |  3 ++
 .../freescale/imx93-11x11-frdm-pixpaper.dtso  | 51 +++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index ce8f937c2315..fedd3552b577 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -403,6 +403,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-kontron-bl-osm-s.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-segin.dtb
 
+imx93-11x11-frdm-pixpaper-dtbs += imx93-11x11-frdm.dtb imx93-11x11-frdm-pixpaper.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm-pixpaper.dtb
+
 imx93-phyboard-nash-jtag-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-nash-jtag.dtbo
 imx93-phyboard-nash-peb-wlbt-07-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-nash-peb-wlbt-07.dtbo
 imx93-phyboard-nash-pwm-fan-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-nash-pwm-fan.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso b/arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso
new file mode 100644
index 000000000000..38e0c5dd82f9
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Overlay for Mayqueen (Open-EP Community) pixpaper display
+ * support on NXP FRDM i.MX 93 Development Board
+ *
+ * Copyright (C) 2026 Wig Cheng <onlywig@...il.com>
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include "imx93-pinfunc.h"
+
+/dts-v1/;
+/plugin/;
+
+&iomuxc {
+	pinctrl_lpspi3: lpspi3grp {
+		fsl,pins = <
+			MX93_PAD_GPIO_IO08__GPIO2_IO08		0x3fe /* SPI3 CE0 */
+			MX93_PAD_GPIO_IO09__LPSPI3_SIN		0x3fe /* SPI3 MISO */
+			MX93_PAD_GPIO_IO10__LPSPI3_SOUT		0x3fe /* SPI3 MOSI */
+			MX93_PAD_GPIO_IO11__LPSPI3_SCK		0x3fe /* SPI3 CLK*/
+		>;
+	};
+
+	pinctrl_epd_ctrl: epdctrlgrp {
+		fsl,pins = <
+			MX93_PAD_GPIO_IO05__GPIO2_IO05		0x31e /* DC pin */
+			MX93_PAD_GPIO_IO06__GPIO2_IO06		0x31e /* RESET pin */
+			MX93_PAD_GPIO_IO26__GPIO2_IO26		0x31e /* BUSY pin */
+		>;
+	};
+};
+
+&lpspi3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	fsl,spi-num-chipselects = <1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lpspi3>, <&pinctrl_epd_ctrl>;
+	cs-gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	display@0 {
+		compatible = "mayqueen,pixpaper";
+		reg = <0>;
+		spi-max-frequency = <5000000>;
+		reset-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>;
+		dc-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
+		busy-gpios = <&gpio2 26 GPIO_ACTIVE_HIGH>;
+	};
+};
-- 
2.43.0