[PATCH v3 05/12] ARM: dts: imx6ul: Add Variscite audio codec files
From: Stefano Radaelli <hidden>
Date: 2026-09-27 12:46:43
Also in:
imx, linux-arm-kernel, linux-devicetree, lkml
Subsystem:
arm/freescale imx / mxc / layerscape arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Stefano Radaelli <redacted> Add shared WM8904 and WM8731 audio option DTSI files for VAR-SOM-6UL and DART-6UL. Keep the codec, SAI2 setup and pinctrl out of the module base so each board selects its fitted codec. The DART-6UL WM8904 wrapper adds the microphone routes to IN2L, IN2R and MICBIAS. Both modules use the same WM8731 description. Signed-off-by: Stefano Radaelli <redacted> --- v1->v2: - Share the WM8904 description with a DART-specific microphone routing wrapper, and consolidate the identical WM8731 files. .../imx/imx6ul-imx6ull-var-dart-wm8904.dtsi | 17 ++++ .../nxp/imx/imx6ul-imx6ull-var-wm8731.dtsi | 71 ++++++++++++++++ .../nxp/imx/imx6ul-imx6ull-var-wm8904.dtsi | 85 +++++++++++++++++++ 3 files changed, 173 insertions(+) create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-dart-wm8904.dtsi create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8731.dtsi create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8904.dtsi
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-dart-wm8904.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-dart-wm8904.dtsi
new file mode 100644
index 000000000000..236022f3da10
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-dart-wm8904.dtsi@@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com + */ + +#include "imx6ul-imx6ull-var-wm8904.dtsi" + +&sound_wm8904 { + simple-audio-card,routing = + "Headphone Jack", "HPOUTL", + "Headphone Jack", "HPOUTR", + "IN1L", "Line In Jack", + "IN1R", "Line In Jack", + "IN2L", "Microphone Jack", + "IN2R", "Microphone Jack", + "Microphone Jack", "MICBIAS"; +};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8731.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8731.dtsi
new file mode 100644
index 000000000000..7d74fc3b7014
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8731.dtsi@@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com + */ + +/ { + sound { + compatible = "simple-audio-card"; + simple-audio-card,bitclock-master = <&sound_master>; + simple-audio-card,format = "i2s"; + simple-audio-card,frame-master = <&sound_master>; + simple-audio-card,name = "wm8731audio"; + simple-audio-card,routing = + "Headphone Jack", "RHPOUT", + "Headphone Jack", "LHPOUT", + "LLINEIN", "Line Jack", + "RLINEIN", "Line Jack", + "MICIN", "Mic Bias", + "Mic Bias", "Mic Jack"; + simple-audio-card,widgets = + "Headphone", "Headphone Jack", + "Line", "Line Jack", + "Microphone", "Mic Jack"; + + sound_master: simple-audio-card,cpu { + sound-dai = <&sai2>; + }; + + simple-audio-card,codec { + sound-dai = <&codec>; + system-clock-frequency = <12288000>; + }; + }; +}; + +&i2c2 { + codec: audio-codec@1a { + compatible = "wlf,wm8731"; + reg = <0x1a>; + #sound-dai-cells = <0>; + clocks = <&clks IMX6UL_CLK_SAI2>; + clock-names = "mclk"; + AVDD-supply = <®_3p3v>; + DBVDD-supply = <®_3p3v>; + DCVDD-supply = <®_3p3v>; + HPVDD-supply = <®_3p3v>; + }; +}; + +&sai2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_sai2>; + assigned-clocks = <&clks IMX6UL_CLK_SAI2_SEL>, + <&clks IMX6UL_CLK_SAI2>; + assigned-clock-parents = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>; + assigned-clock-rates = <0>, <12288000>; + fsl,sai-mclk-direction-output; + status = "okay"; +}; + +&iomuxc { + pinctrl_sai2: sai2-grp { + fsl,pins = < + MX6UL_PAD_JTAG_TDI__SAI2_TX_BCLK 0x17088 + MX6UL_PAD_JTAG_TDO__SAI2_TX_SYNC 0x17088 + MX6UL_PAD_JTAG_TRST_B__SAI2_TX_DATA 0x11088 + MX6UL_PAD_JTAG_TCK__SAI2_RX_DATA 0x11088 + MX6UL_PAD_JTAG_TMS__SAI2_MCLK 0x17088 + >; + }; +};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8904.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8904.dtsi
new file mode 100644
index 000000000000..dd5f6e4edad5
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-imx6ull-var-wm8904.dtsi@@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com + */ + +/ { + sound_wm8904: sound { + compatible = "simple-audio-card"; + simple-audio-card,bitclock-master = <&sound_master>; + simple-audio-card,format = "i2s"; + simple-audio-card,frame-master = <&sound_master>; + simple-audio-card,name = "wm8904audio"; + simple-audio-card,routing = + "Headphone Jack", "HPOUTL", + "Headphone Jack", "HPOUTR", + "IN1L", "Line In Jack", + "IN1R", "Line In Jack"; + simple-audio-card,widgets = + "Microphone", "Microphone Jack", + "Headphone", "Headphone Jack", + "Line", "Line In Jack"; + simple-audio-card,mclk-fs = <256>; + + simple-audio-card,cpu { + sound-dai = <&sai2>; + }; + + sound_master: simple-audio-card,codec { + sound-dai = <&codec>; + }; + }; +}; + +&i2c2 { + codec: audio-codec@1a { + compatible = "wlf,wm8904"; + reg = <0x1a>; + #sound-dai-cells = <0>; + clocks = <&clks IMX6UL_CLK_SAI2>; + clock-names = "mclk"; + AVDD-supply = <®_3p3v>; + CPVDD-supply = <®_3p3v>; + DBVDD-supply = <®_3p3v>; + DCVDD-supply = <®_3p3v>; + MICVDD-supply = <®_3p3v>; + wlf,drc-cfg-names = "default", "peaklimiter", "tradition", + "soft", "music"; + /* + * Config registers per name, respectively: + * KNEE_IP = 0, KNEE_OP = 0, HI_COMP = 1, LO_COMP = 1 + * KNEE_IP = -24, KNEE_OP = -6, HI_COMP = 1/4, LO_COMP = 1 + * KNEE_IP = -42, KNEE_OP = -3, HI_COMP = 0, LO_COMP = 1 + * KNEE_IP = -45, KNEE_OP = -9, HI_COMP = 1/8, LO_COMP = 1 + * KNEE_IP = -30, KNEE_OP = -10.5, HI_COMP = 1/4, LO_COMP = 1 + */ + wlf,drc-cfg-regs = /bits/ 16 <0x01af 0x3248 0x0000 0x0000>, + /bits/ 16 <0x04af 0x324b 0x0010 0x0408>, + /bits/ 16 <0x04af 0x324b 0x0028 0x0704>, + /bits/ 16 <0x04af 0x324b 0x0018 0x078c>, + /bits/ 16 <0x04af 0x324b 0x0010 0x050e>; + }; +}; + +&sai2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_sai2>; + assigned-clocks = <&clks IMX6UL_CLK_SAI2_SEL>, + <&clks IMX6UL_CLK_SAI2>; + assigned-clock-parents = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>; + assigned-clock-rates = <0>, <11565177>; + fsl,sai-mclk-direction-output; + status = "okay"; +}; + +&iomuxc { + pinctrl_sai2: sai2-grp { + fsl,pins = < + MX6UL_PAD_JTAG_TDI__SAI2_TX_BCLK 0x17088 + MX6UL_PAD_JTAG_TDO__SAI2_TX_SYNC 0x17088 + MX6UL_PAD_JTAG_TRST_B__SAI2_TX_DATA 0x11088 + MX6UL_PAD_JTAG_TCK__SAI2_RX_DATA 0x11088 + MX6UL_PAD_JTAG_TMS__SAI2_MCLK 0x17088 + >; + }; +};
--
2.47.3