[PATCH v4 0/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[PATCH v4 0/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Wig Cheng]

Changes in v4:
- Drop invalid property

Changes in v3:
- Misunderstood reviewer's feedback in v1, improved commit message description

Changes in v2:
- Fix Makefile alphabetical ordering
- Move vendor property before status in device tree
- Simplify commit message as suggested by reviewer

Wig Cheng (1):
  arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

 arch/arm64/boot/dts/freescale/Makefile        |  4 ++
 .../freescale/imx93-11x11-frdm-pixpaper.dtso  | 50 +++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso

-- 
2.43.0

[PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Wig Cheng]

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

Enable Open-EP Community pixpaper-213-c support on NXP i.MX93.

Signed-off-by: Wig Cheng <onlywig@gmail.com>
---
 arch/arm64/boot/dts/freescale/Makefile        |  4 ++
 .../freescale/imx93-11x11-frdm-pixpaper.dtso  | 50 +++++++++++++++++++
 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..c2727f8061e2 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -398,6 +398,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-i3c.dtb
 
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm.dtb
+
+imx93-11x11-frdm-pixpaper-dtbs += imx93-11x11-frdm.dtb imx93-11x11-frdm-pixpaper.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm-pixpaper.dtb
+
 dtb-$(CONFIG_ARCH_MXC) += imx93-14x14-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-kontron-bl-osm-s.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash.dtb
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..5fee27a589b5
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso
@@ -0,0 +1,50 @@
+// 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@gmail.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>;
+	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

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Peng Fan]

On Thu, Jan 29, 2026 at 10:29:10AM +0800, Wig Cheng wrote:
>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
>
>Enable Open-EP Community pixpaper-213-c support on NXP i.MX93.
>
>Signed-off-by: Wig Cheng <onlywig@gmail.com>

Reviewed-by: Peng Fan <peng.fan@nxp.com>

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Wig Cheng]

>
> On Thu, Jan 29, 2026 at 10:29:10AM +0800, Wig Cheng wrote:
> >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
> >
> >Enable Open-EP Community pixpaper-213-c support on NXP i.MX93.
> >
> >Signed-off-by: Wig Cheng <onlywig@gmail.com>
>
> Reviewed-by: Peng Fan <peng.fan@nxp.com>

Hi reviewers,

Thanks to Peng for the review.

Just a gentle ping on this patch.
Please let me know if any further reviews or changes are needed.

Thanks,
Wig

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Frank Li]

On Thu, Jan 29, 2026 at 10:29:10AM +0800, Wig Cheng wrote:
> 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
>
> Enable Open-EP Community pixpaper-213-c support on NXP i.MX93.
>
> Signed-off-by: Wig Cheng <onlywig@gmail.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  arch/arm64/boot/dts/freescale/Makefile        |  4 ++
>  .../freescale/imx93-11x11-frdm-pixpaper.dtso  | 50 +++++++++++++++++++
>  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..c2727f8061e2 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -398,6 +398,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-i3c.dtb
>
>  dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm.dtb
> +
> +imx93-11x11-frdm-pixpaper-dtbs += imx93-11x11-frdm.dtb imx93-11x11-frdm-pixpaper.dtbo
> +dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm-pixpaper.dtb
> +
>  dtb-$(CONFIG_ARCH_MXC) += imx93-14x14-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx93-kontron-bl-osm-s.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash.dtb
> 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..5fee27a589b5
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtso
> @@ -0,0 +1,50 @@
> +// 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@gmail.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>;
> +	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
>

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Frank Li]

On Fri, Feb 06, 2026 at 12:14:21AM +0800, Wig Cheng wrote:
> >
> > On Thu, Jan 29, 2026 at 10:29:10AM +0800, Wig Cheng wrote:
> > >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
> > >
> > >Enable Open-EP Community pixpaper-213-c support on NXP i.MX93.
> > >
> > >Signed-off-by: Wig Cheng <onlywig@gmail.com>
> >
> > Reviewed-by: Peng Fan <peng.fan@nxp.com>
>
> Hi reviewers,
>
> Thanks to Peng for the review.
>
> Just a gentle ping on this patch.
> Please let me know if any further reviews or changes are needed.

There are CHECK_DTBS warning

arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtb: display@0 (mayqueen,pixpaper): spi-max-frequency: 5000000 is greater than the maximum of 1000000
	from schema $id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml

Does 1000000 work for spi-max-frequency? or need update binding doc?

Frank

>
> Thanks,
> Wig

Re: [PATCH v4 0/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Frank Li]

On Thu, 29 Jan 2026 10:29:09 +0800, Wig Cheng wrote:
> Changes in v4:
> - Drop invalid property
> 
> Changes in v3:
> - Misunderstood reviewer's feedback in v1, improved commit message description
> 
> Changes in v2:
> - Fix Makefile alphabetical ordering
> - Move vendor property before status in device tree
> - Simplify commit message as suggested by reviewer
> 
> [...]

Applied, thanks!

[1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM
      (no commit info)

Best regards,
--
Frank Li <Frank.Li@nxp.com>

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Wig Cheng]

>
> arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtb: display@0 (mayqueen,pixpaper): spi-max-frequency: 5000000 is greater than the maximum of 1000000
>         from schema $id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml
>
> Does 1000000 work for spi-max-frequency? or need update binding doc?
>

Both 1MHz and 5MHz work on i.MX93. I chose 5MHz for better refresh
performance, which is within the LPSPI3 controller's capabilities.
The 1MHz limit in the binding is a conservative generic value I think.

Thanks,
Wig

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Frank Li]

On Wed, Feb 25, 2026 at 10:11:02PM +0800, Wig Cheng wrote:
> >
> > arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtb: display@0 (mayqueen,pixpaper): spi-max-frequency: 5000000 is greater than the maximum of 1000000
> >         from schema $id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml
> >
> > Does 1000000 work for spi-max-frequency? or need update binding doc?
> >
>
> Both 1MHz and 5MHz work on i.MX93. I chose 5MHz for better refresh
> performance, which is within the LPSPI3 controller's capabilities.
> The 1MHz limit in the binding is a conservative generic value I think.

Okay, let change to 1Mhz first. we will update it after updated binding
doc.

Frank
>
> Thanks,
> Wig

Re: [PATCH v4 1/1] arm64: dts: freescale: add pixpaper display overlay for i.MX93 FRDM

[Wig Cheng]

>
> On Wed, Feb 25, 2026 at 10:11:02PM +0800, Wig Cheng wrote:
> > >
> > > arch/arm64/boot/dts/freescale/imx93-11x11-frdm-pixpaper.dtb: display@0 (mayqueen,pixpaper): spi-max-frequency: 5000000 is greater than the maximum of 1000000
> > >         from schema $id: http://devicetree.org/schemas/display/mayqueen,pixpaper.yaml
> > >
> > > Does 1000000 work for spi-max-frequency? or need update binding doc?
> > >
> >
> > Both 1MHz and 5MHz work on i.MX93. I chose 5MHz for better refresh
> > performance, which is within the LPSPI3 controller's capabilities.
> > The 1MHz limit in the binding is a conservative generic value I think.
>
> Okay, let change to 1Mhz first. we will update it after updated binding
> doc.
>
> Frank

Hi Frank,
I've sent v5 with 1MHz as you suggested:
https://lore.kernel.org/all/20260226144819.3428730-2-onlywig@gmail.com/

Thanks for your help,

Wig