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The mux is controlled by a GPIO. Add a pinctrl-based multiplexer node to describe this routing and ensure proper probe ordering of the dependent devices. Previously, MICFIL operation implicitly depended on the default level of PCA6416 GPIO3. After adding the pinctrl-multiplexer, make the dependency explicit. Reviewed-by: Ahmad Fatoum Signed-off-by: Frank Li --- change in v3 - v4 - none change in v2 - update commit message to show why need update PDM MICIFL. --- arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts index b256be710ea1281465f5cecc7a3b979f2c068e43..1341ee27239fd41a26117adc9023524ce50420a7 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts @@ -50,6 +50,25 @@ status { }; }; + can_mux: mux-controller-0 { + compatible = "gpio-mux"; + #mux-control-cells = <0>; + #mux-state-cells = <1>; + mux-gpios = <&pca6416 3 GPIO_ACTIVE_HIGH>; + }; + + can_mux_pinctrl: pinctrl-gpiomux { + compatible = "pinctrl-multiplexer"; + + can_fun: can-grp { + mux-states = <&can_mux 1>; + }; + + pdm_fun: pdm-grp { + mux-states = <&can_mux 0>; + }; + }; + memory@40000000 { device_type = "memory"; reg = <0x0 0x40000000 0 0xc0000000>, @@ -446,7 +465,7 @@ &flexcan1 { &flexcan2 { pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_flexcan2>; + pinctrl-0 = <&pinctrl_flexcan2>, <&can_fun>; phys = <&flexcan_phy 1>; status = "disabled";/* can2 pin conflict with pdm */ }; @@ -712,7 +731,7 @@ &lcdif3 { &micfil { #sound-dai-cells = <0>; pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_pdm>; + pinctrl-0 = <&pinctrl_pdm>, <&pdm_fun>; assigned-clocks = <&clk IMX8MP_CLK_PDM>; assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>; assigned-clock-rates = <196608000>; -- 2.43.0