[PATCH v2 15/17] arm64: dts: imx952-evk: Add board muxes to select between CAN1/PDM
From: Chancel Liu <hidden>
Date: 2026-08-18 03:04:08
Also in:
imx, linux-devicetree, lkml
Subsystem:
arm/freescale imx / mxc / layerscape arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Chancel Liu <redacted> CAN1 has pin conflict with PDM. MQS1 requires an enable signal via a separate GPIO. Replace static gpio-hog settings with GPIO-controlled board muxes using the pinctrl-multiplexer framework, so that the conflicting functions can be selected at runtime. Signed-off-by: Chancel Liu <redacted> --- arch/arm64/boot/dts/freescale/imx952-evk.dts | 50 ++++++++++++++------ 1 file changed, 36 insertions(+), 14 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx952-evk.dts b/arch/arm64/boot/dts/freescale/imx952-evk.dts
index 2224b90aafe9..e9d735dc2a51 100644
--- a/arch/arm64/boot/dts/freescale/imx952-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx952-evk.dts@@ -52,6 +52,40 @@ chosen { stdout-path = &lpuart1; }; + can1_pdm_mux: mux-controller-0 { + compatible = "gpio-mux"; + #mux-control-cells = <0>; + #mux-state-cells = <1>; + mux-gpios = <&pcal6416 10 GPIO_ACTIVE_HIGH>; + }; + + mqs1_en_mux: mux-controller-1 { + compatible = "gpio-mux"; + #mux-control-cells = <0>; + #mux-state-cells = <1>; + mux-gpios = <&pcal6416 15 GPIO_ACTIVE_HIGH>; + }; + + pinctrl-gpiomux { + compatible = "pinctrl-multiplexer"; + + can1_fun: can1-grp { + mux-states = <&can1_pdm_mux 1>; + }; + + mqs1_disable: mqs1-disable-grp { + mux-states = <&mqs1_en_mux 0>; + }; + + mqs1_enable: mqs1-enable-grp { + mux-states = <&mqs1_en_mux 1>; + }; + + pdm_fun: pdm-grp { + mux-states = <&can1_pdm_mux 0>; + }; + }; + dmic: dmic { compatible = "dmic-codec"; #sound-dai-cells = <0>;
@@ -284,7 +318,7 @@ &asrc2 { /* pin conflict with PDM */ &flexcan1 { pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_flexcan1>; + pinctrl-0 = <&pinctrl_flexcan1>, <&mqs1_disable>, <&can1_fun>; phys = <&flexcan1_phy>; status = "disabled"; };
@@ -387,18 +421,6 @@ pcal6416: gpio@21 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_pcal6416>; vcc-supply = <®_3p3v>; - - pdm-can-sel-hog { - gpio-hog; - gpios = <10 GPIO_ACTIVE_HIGH>; - output-low; - }; - - mqs-en-hog { - gpio-hog; - gpios = <15 GPIO_ACTIVE_HIGH>; - output-low; - }; }; };
@@ -491,7 +513,7 @@ &micfil { <&scmi_clk IMX952_CLK_AUDIOPLL1>; assigned-clock-rates = <3932160000>, <3612672000>, <393216000>, <361267200>, <49152000>; - pinctrl-0 = <&pinctrl_pdm>; + pinctrl-0 = <&pinctrl_pdm>, <&mqs1_disable>, <&pdm_fun>; pinctrl-1 = <&pinctrl_pdm_sleep>; pinctrl-names = "default", "sleep"; status = "okay";
--
2.50.1