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[125.227.154.99]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a802fdd0c9sm49900895ad.95.2026.01.24.08.36.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 24 Jan 2026 08:36:16 -0800 (PST) From: Wig Cheng To: geert+renesas@glider.be, magnus.damm@gmail.com Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, zaq14760@gmail.com, Wig Cheng Subject: [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board Date: Sun, 25 Jan 2026 00:36:11 +0800 Message-ID: <20260124163611.3279104-1-onlywig@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- arch/arm64/boot/dts/renesas/Makefile | 3 ++ .../renesas/r9a09g057h48-kakip-pixpaper.dtso | 40 +++++++++++++++++++ 2 files changed, 43 insertions(+) create mode 100644 arch/arm64/boot/dts/renesas/r9a09g057h48-kakip-pixpaper= .dtso diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/ren= esas/Makefile index 1fab1b50f20e..d4dfb7fd973b 100644 --- a/arch/arm64/boot/dts/renesas/Makefile +++ b/arch/arm64/boot/dts/renesas/Makefile @@ -202,6 +202,9 @@ dtb-$(CONFIG_ARCH_R9A09G057) +=3D rzv2-evk-cn15-sd.dtbo r9a09g057h44-rzv2h-evk-cn15-sd-dtbs :=3D r9a09g057h44-rzv2h-evk.dtb rzv2-e= vk-cn15-sd.dtbo dtb-$(CONFIG_ARCH_R9A09G057) +=3D r9a09g057h44-rzv2h-evk-cn15-sd.dtb dtb-$(CONFIG_ARCH_R9A09G057) +=3D r9a09g057h48-kakip.dtb +dtb-$(CONFIG_ARCH_R9A09G057) +=3D r9a09g057h48-kakip-pixpaper.dtbo +r9a09g057h48-kakip-pixpaper-dtbs :=3D r9a09g057h48-kakip.dtb r9a09g057h48-= kakip-pixpaper.dtbo +dtb-$(CONFIG_ARCH_R9A09G057) +=3D r9a09g057h48-kakip-pixpaper.dtb =20 dtb-$(CONFIG_ARCH_R9A09G077) +=3D r9a09g077m44-rzt2h-evk.dtb =20 diff --git a/arch/arm64/boot/dts/renesas/r9a09g057h48-kakip-pixpaper.dtso b= /arch/arm64/boot/dts/renesas/r9a09g057h48-kakip-pixpaper.dtso new file mode 100644 index 000000000000..e36cfc9227f4 --- /dev/null +++ b/arch/arm64/boot/dts/renesas/r9a09g057h48-kakip-pixpaper.dtso @@ -0,0 +1,40 @@ +// 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 + */ + +/dts-v1/; +/plugin/; + +#include +#include +#include + +&pinctrl { + rspi0_pins: rspi0 { + pinmux =3D , /* SPI0 MOSI */ + , /* SPI0 MISO */ + , /* SPI0 CLK */ + ; /* SPI0 CE0 */ + }; +}; + +&rspi0 { + pinctrl-0 =3D <&rspi0_pins>; + pinctrl-names =3D "default"; + #address-cells =3D <1>; + #size-cells =3D <0>; + status =3D "okay"; + + display0: display@0 { + compatible =3D "mayqueen,pixpaper"; + reg =3D <0>; + spi-max-frequency =3D <1000000>; + reset-gpios =3D <&pinctrl RZV2H_GPIO(A, 7) GPIO_ACTIVE_HIGH>; + busy-gpios =3D <&pinctrl RZV2H_GPIO(B, 3) GPIO_ACTIVE_HIGH>; + dc-gpios =3D <&pinctrl RZV2H_GPIO(7, 4) GPIO_ACTIVE_HIGH>; + }; +}; --=20 2.43.0