linux-kernel - Re: [PATCH 2/2] arm64: dts: imx8mp libra: add peb-av-10 expansion board overlay

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Message-ID: <aRnK7zqS5qLoAKWk@dragon>
Date: Sun, 16 Nov 2025 21:00:31 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Yashwanth Varakala <y.varakala@...tec.de>
Cc: shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
	festevam@...il.com, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, upstream@...ts.phytec.de,
	peng.fan@....com
Subject: Re: [PATCH 2/2] arm64: dts: imx8mp libra: add peb-av-10 expansion
 board overlay

On Tue, Nov 11, 2025 at 03:34:07PM +0100, Yashwanth Varakala wrote:
> Add an overlay of expansion board (PEB-AV-10) that supports multimedia
> interfaces, 3.5mm headphone jack, a USB-A port and LVDS, backlight
> connectors can be connected to the imx8mp libra. Audio works when no
> display is connected to expansion board.
> 
> A separate overlay for Powertip display, based on peb-av-10.dtsi and
> intended for use with PEB-AV-10 expansion board, will be added
> later as display support is not yet available.
> 
> Signed-off-by: Yashwanth Varakala <y.varakala@...tec.de>
> ---
>  arch/arm64/boot/dts/freescale/Makefile        |   3 +
>  .../imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi | 196 ++++++++++++++++++
>  .../imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtso |   9 +
>  3 files changed, 208 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi
>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtso
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index eb38dcc76b84..0d2bd8d1d3b6 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -223,8 +223,11 @@ imx8mp-libra-rdk-fpsc-lvds-etml1010g3dra-dtbs += imx8mp-libra-rdk-fpsc.dtb \
>  	imx8mp-libra-rdk-fpsc-lvds-etml1010g3dra.dtbo
>  imx8mp-libra-rdk-fpsc-lvds-ph128800t006-zhc01-dtbs += imx8mp-libra-rdk-fpsc.dtb \
>  	imx8mp-libra-rdk-fpsc-lvds-ph128800t006-zhc01.dtbo
> +imx8mp-libra-rdk-fpsc-lvds-peb-av-10-dtbs += imx8mp-libra-rdk-fpsc.dtb \
> +	imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtbo
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-libra-rdk-fpsc-lvds-etml1010g3dra.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-libra-rdk-fpsc-lvds-ph128800t006-zhc01.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-msc-sm2s-ep1.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-navqp.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-nitrogen-enc-carrier-board.dtb
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi
> new file mode 100644
> index 000000000000..6574dfbb32f7
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi
> @@ -0,0 +1,196 @@
> +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
> +/*
> + * Copyright (C) 2025 PHYTEC Messtechnik GmbH
> + */
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/clock/imx8mp-clock.h>
> +#include "imx8mp-pinfunc.h"
> +
> +&{/} {
> +
> +	backlight_lvds1: backlight-lvds1 {
> +		compatible = "pwm-backlight";
> +		pinctrl-0 = <&pinctrl_lvds1>;
> +		pinctrl-names = "default";
> +		power-supply = <&reg_vcc_12v>;
> +		status = "disabled";
> +	};
> +
> +	panel_lvds1: panel-lvds1 {
> +		backlight = <&backlight_lvds1>;
> +		power-supply = <&reg_vdd_3v3>;
> +		status = "disabled";
> +
> +		port {
> +			panel1_in: endpoint {
> +				remote-endpoint = <&ldb_lvds_ch1>;
> +			};
> +		};
> +	};
> +
> +	reg_vcc_12v: regulator-12v {
> +		compatible = "regulator-fixed";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-min-microvolt = <12000000>;
> +		regulator-name = "VCC_12V";
> +	};
> +
> +	reg_vcc_1v8_audio: regulator-1v8 {
> +		compatible = "regulator-fixed";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-name = "VCC_1V8_Audio";
> +	};
> +
> +	reg_vcc_3v3_analog: regulator-3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-min-microvolt = <3300000>;
> +		regulator-name = "VCC_3V3_Analog";
> +	};
> +
> +	sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "snd-peb-av-10";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,bitclock-master = <&dailink_master>;
> +		simple-audio-card,frame-master = <&dailink_master>;
> +		simple-audio-card,mclk-fs = <32>;
> +		simple-audio-card,widgets =
> +			"Line", "Line In",
> +			"Speaker", "Speaker",
> +			"Microphone", "Microphone Jack",
> +			"Headphone", "Headphone Jack";
> +		simple-audio-card,routing =
> +			"Speaker", "SPOP",
> +			"Speaker", "SPOM",
> +			"Headphone Jack", "HPLOUT",
> +			"Headphone Jack", "HPROUT",
> +			"LINE1L", "Line In",
> +			"LINE1R", "Line In",
> +			"MIC3R", "Microphone Jack",
> +			"Microphone Jack", "Mic Bias";
> +
> +		simple-audio-card,codec {
> +			sound-dai = <&codec>;
> +		};
> +
> +		dailink_master: simple-audio-card,cpu {
> +			sound-dai = <&sai5>;
> +		};
> +	};
> +};
> +
> +&i2c5 {
> +	clock-frequency = <400000>;
> +	pinctrl-0 = <&pinctrl_i2c5>;
> +	pinctrl-1 = <&pinctrl_i2c5_gpio>;
> +	pinctrl-names = "default", "gpio";
> +	scl-gpios = <&gpio3 21 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +	sda-gpios = <&gpio5 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	status = "okay";
> +
> +	codec: codec@18 {

audio-codec for node name

Shawn

> +		compatible = "ti,tlv320aic3007";
> +		reg = <0x18>;
> +		pinctrl-0 = <&pinctrl_tlv320>;
> +		pinctrl-names = "default";
> +		#sound-dai-cells = <0>;
> +		ai3x-gpio-func = <0xd 0x0>;
> +		ai3x-micbias-vg = <2>;
> +		AVDD-supply = <&reg_vcc_3v3_analog>;
> +		DRVDD-supply = <&reg_vcc_3v3_analog>;
> +		DVDD-supply = <&reg_vcc_1v8_audio>;
> +		IOVDD-supply = <&reg_vdd_3v3>;
> +	};
> +
> +	eeprom@57 {
> +		compatible = "atmel,24c32";
> +		reg = <0x57>;
> +		pagesize = <32>;
> +		vcc-supply = <&reg_vdd_3v3>;
> +	};
> +};
> +
> +&ldb_lvds_ch1 {
> +	remote-endpoint = <&panel1_in>;
> +};
> +
> +&pwm2 {
> +	pinctrl-0 = <&pinctrl_pwm2>;
> +	pinctrl-names = "default";
> +};
> +
> +&sai5 {
> +	pinctrl-0 = <&pinctrl_sai5>;
> +	pinctrl-names = "default";
> +	assigned-clocks = <&clk IMX8MP_CLK_SAI5>;
> +	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
> +	assigned-clock-rates = <12288000>;
> +	clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI5_IPG>,
> +		 <&clk IMX8MP_CLK_DUMMY>,
> +		 <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI5_MCLK1>,
> +		 <&clk IMX8MP_CLK_DUMMY>,
> +		 <&clk IMX8MP_CLK_DUMMY>,
> +		 <&clk IMX8MP_AUDIO_PLL1_OUT>,
> +		 <&clk IMX8MP_AUDIO_PLL2_OUT>;
> +	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k",
> +		      "pll11k";
> +	#sound-dai-cells = <0>;
> +	fsl,sai-mclk-direction-output;
> +	fsl,sai-synchronous-rx;
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl_i2c5: i2c5grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI5_RXD0__I2C5_SCL	0x400001c2
> +			MX8MP_IOMUXC_SPDIF_RX__I2C5_SDA		0x400001c2
> +		>;
> +	};
> +
> +	pinctrl_i2c5_gpio: i2c5gpiogrp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI5_RXD0__GPIO3_IO21	0x1e2
> +			MX8MP_IOMUXC_SPDIF_RX__GPIO5_IO04	0x1e2
> +		>;
> +	};
> +
> +	pinctrl_lvds1: lvds1grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI3_RXFS__GPIO4_IO28	0x12
> +		>;
> +	};
> +
> +	pinctrl_pwm2: pwm2grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_GPIO1_IO09__PWM2_OUT	0x12
> +		>;
> +	};
> +
> +	pinctrl_sai5: sai5grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI2_RXD0__AUDIOMIX_SAI5_TX_DATA00 0xd6
> +			MX8MP_IOMUXC_SAI3_RXD__AUDIOMIX_SAI5_RX_DATA00	0xd6
> +			MX8MP_IOMUXC_SAI5_MCLK__AUDIOMIX_SAI5_MCLK	0xd6
> +			MX8MP_IOMUXC_SAI5_RXD1__AUDIOMIX_SAI5_TX_SYNC	0xd6
> +			MX8MP_IOMUXC_SAI5_RXD2__AUDIOMIX_SAI5_TX_BCLK	0xd6
> +		>;
> +	};
> +
> +	pinctrl_tlv320: tlv320grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI3_RXC__GPIO4_IO29	0x16
> +		>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtso b/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtso
> new file mode 100644
> index 000000000000..803a199dffa3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtso
> @@ -0,0 +1,9 @@
> +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
> +/*
> + * Copyright (C) 2025 PHYTEC Messtechnik GmbH
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include "imx8mp-libra-rdk-fpsc-lvds-peb-av-10.dtsi"
> -- 
> 2.34.1
>