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arm64: dts: renesas: r9a09g057h48-kakip: Add pixpaper display overlay

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Add device tree overlay to support the MayQueen PixPaper e-paper display
on the Renesas RZ/V2H EVK (KAKIP board). The display is connected via
SPI0 interface and uses GPIO pins for reset, busy, and DC control.

The overlay configures:
  - RSPI0 pinmux for SPI communication (MOSI, MISO, CLK, CE0),
  - PixPaper display device with proper GPIO assignments,
  - SPI frequency set to 1MHz for stable operation.

This enables support for the Open-EP Community pixpaper-213-c module on
the RZ/V2H platform.

Signed-off-by: Wig Cheng <onlywig@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260124163611.3279104-1-onlywig@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Wig Cheng 2026-01-25 00:36:11 +08:00 committed by Geert Uytterhoeven
parent f01be0fa24
commit c57fdc0aa2
2 changed files with 42 additions and 0 deletions
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3
arch/arm64/boot/dts/renesas/Makefile
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@ -202,6 +202,9 @@ dtb-$(CONFIG_ARCH_R9A09G057) += rzv2-evk-cn15-sd.dtbo
r9a09g057h44-rzv2h-evk-cn15-sd-dtbs := r9a09g057h44-rzv2h-evk.dtb rzv2-evk-cn15-sd.dtbo
dtb-$(CONFIG_ARCH_R9A09G057) += r9a09g057h44-rzv2h-evk-cn15-sd.dtb
dtb-$(CONFIG_ARCH_R9A09G057) += r9a09g057h48-kakip.dtb
dtb-$(CONFIG_ARCH_R9A09G057) += r9a09g057h48-kakip-pixpaper.dtbo
r9a09g057h48-kakip-pixpaper-dtbs := r9a09g057h48-kakip.dtb r9a09g057h48-kakip-pixpaper.dtbo
dtb-$(CONFIG_ARCH_R9A09G057) += r9a09g057h48-kakip-pixpaper.dtb
dtb-$(CONFIG_ARCH_R9A09G077) += r9a09g077m44-rzt2h-evk.dtb

39
arch/arm64/boot/dts/renesas/r9a09g057h48-kakip-pixpaper.dtso Normal file
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@ -0,0 +1,39 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Device Tree Overlay for Mayqueen (Open-EP Community) pixpaper display
* support on Renesas RZ/V2H platform (KAKIP board).
*
* Copyright (C) 2026 Wig Cheng <onlywig@gmail.com>
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
#include <dt-bindings/gpio/gpio.h>
&pinctrl {
rspi0_pins: rspi0 {
pinmux = <RZV2H_PORT_PINMUX(9, 0, 1)>, /* SPI0 MOSI */
<RZV2H_PORT_PINMUX(9, 1, 1)>, /* SPI0 MISO */
<RZV2H_PORT_PINMUX(9, 2, 1)>, /* SPI0 CLK */
<RZV2H_PORT_PINMUX(9, 3, 1)>; /* SPI0 CE0 */
};
};
&rspi0 {
pinctrl-0 = <&rspi0_pins>;
pinctrl-names = "default";
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
display@0 {
compatible = "mayqueen,pixpaper";
reg = <0>;
spi-max-frequency = <1000000>;
reset-gpios = <&pinctrl RZV2H_GPIO(A, 7) GPIO_ACTIVE_HIGH>;
busy-gpios = <&pinctrl RZV2H_GPIO(B, 3) GPIO_ACTIVE_HIGH>;
dc-gpios = <&pinctrl RZV2H_GPIO(7, 4) GPIO_ACTIVE_HIGH>;
};
};