* [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board
@ 2026-01-24 16:36 Wig Cheng
2026-02-02 13:44 ` Wig Cheng
2026-03-13 13:41 ` Geert Uytterhoeven
0 siblings, 2 replies; 4+ messages in thread
From: Wig Cheng @ 2026-01-24 16:36 UTC (permalink / raw)
To: geert+renesas, magnus.damm
Cc: robh, krzk+dt, conor+dt, linux-renesas-soc, devicetree,
linux-kernel, zaq14760, Wig Cheng
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>
---
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/renesas/Makefile
index 1fab1b50f20e..d4dfb7fd973b 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -202,6 +202,9 @@ dtb-$(CONFIG_ARCH_R9A09G057) += rzv2-evk-cn15-sd.dtbo
r9a09g057h44-rzv2h-evk-cn15-sd-dtbs := r9a09g057h44-rzv2h-evk.dtb rzv2-evk-cn15-sd.dtbo
dtb-$(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
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 <onlywig@gmail.com>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.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";
+
+ display0: 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>;
+ };
+};
--
2.43.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board
2026-01-24 16:36 [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board Wig Cheng
@ 2026-02-02 13:44 ` Wig Cheng
2026-02-15 6:53 ` Wig Cheng
2026-03-13 13:41 ` Geert Uytterhoeven
1 sibling, 1 reply; 4+ messages in thread
From: Wig Cheng @ 2026-02-02 13:44 UTC (permalink / raw)
To: geert+renesas, magnus.damm
Cc: robh, krzk+dt, conor+dt, linux-renesas-soc, devicetree,
linux-kernel, zaq14760
Wig Cheng <onlywig@gmail.com> 於 2026年1月25日週日 上午12:36寫道：
>
> 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>
> ---
> 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/renesas/Makefile
> index 1fab1b50f20e..d4dfb7fd973b 100644
> --- a/arch/arm64/boot/dts/renesas/Makefile
> +++ b/arch/arm64/boot/dts/renesas/Makefile
> @@ -202,6 +202,9 @@ dtb-$(CONFIG_ARCH_R9A09G057) += rzv2-evk-cn15-sd.dtbo
> r9a09g057h44-rzv2h-evk-cn15-sd-dtbs := r9a09g057h44-rzv2h-evk.dtb rzv2-evk-cn15-sd.dtbo
> dtb-$(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
>
> 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 <onlywig@gmail.com>
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/irq.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";
> +
> + display0: 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>;
> + };
> +};
> --
> 2.43.0
>
Hi reviewers,
I submitted this patch on January 25th adding device tree overlay
support for the MayQueen PixPaper e-paper display on the Renesas
RZ/V2H EVK (KAKIP board).
I haven't received any feedback yet and wanted to kindly check if
there are any concerns or suggestions for improvement. I'm happy to
address any issues and submit a v2 if needed.
The patch is available at:
https://lore.kernel.org/linux-renesas-soc/20260124163611.3279104-1-onlywig@gmail.com
Thank you for your time and consideration.
Regards,
Wig
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board
2026-02-02 13:44 ` Wig Cheng
@ 2026-02-15 6:53 ` Wig Cheng
0 siblings, 0 replies; 4+ messages in thread
From: Wig Cheng @ 2026-02-15 6:53 UTC (permalink / raw)
To: geert+renesas, magnus.damm
Cc: robh, krzk+dt, conor+dt, linux-renesas-soc, devicetree,
linux-kernel, zaq14760
> >
> > 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.
> >
Hi Geert, Magnus,
Gentle ping on this patch. Note that the pixpaper driver and
dt-bindings "mayqueen,pixpaper" were merged into drm-misc-next for
v6.18 in September 2025, so the prerequisite is now in mainline.
Happy to make any changes if needed.
Thanks,
Wig
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board
2026-01-24 16:36 [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board Wig Cheng
2026-02-02 13:44 ` Wig Cheng
@ 2026-03-13 13:41 ` Geert Uytterhoeven
1 sibling, 0 replies; 4+ messages in thread
From: Geert Uytterhoeven @ 2026-03-13 13:41 UTC (permalink / raw)
To: Wig Cheng
Cc: magnus.damm, robh, krzk+dt, conor+dt, linux-renesas-soc,
devicetree, linux-kernel, zaq14760
Hi Wig,
On Sat, 24 Jan 2026 at 17:36, Wig Cheng <onlywig@gmail.com> wrote:
> 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>
Thanks for your patch!
> --- /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 <onlywig@gmail.com>
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
This include is not needed, so I will drop it while applying.
> +
> +&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";
> +
> + display0: display@0 {
The label is not needed, so I will drop it while applying.
> + 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>;
> + };
> +};
The rest LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v7.1 with the above fixed.
No need to resend.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 4+ messages in thread
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2026-01-24 16:36 [PATCH] arm64: dts: renesas: Add pixpaper display overlay for RZ/V2H Kakip board Wig Cheng
2026-02-02 13:44 ` Wig Cheng
2026-02-15 6:53 ` Wig Cheng
2026-03-13 13:41 ` Geert Uytterhoeven
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