diff options
| author | Frank Li <Frank.Li@nxp.com> | 2026-05-04 19:54:40 -0400 |
|---|---|---|
| committer | Frank Li <Frank.Li@nxp.com> | 2026-06-29 11:39:14 -0400 |
| commit | ec5c75673cb9d4c9a2a55a70d54a6ccb254f4ba4 (patch) | |
| tree | a73f48d874946480e4dec631886c13265b2b176d | |
| parent | d911a33fa8e9fd4c691bc8429180fe1885bc3f2f (diff) | |
arm64: dts: imx8mp-evk: add board-level mux for CAN2 and MICFIL
The board integrates an on-board mux to route shared signals to either
CAN2 or PDM (MICFIL). 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 <a.fatoum@pengutronix.de>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
| -rw-r--r-- | arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 23 |
1 files 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 a7f3acdc36d1..2e092b0b52d9 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts @@ -50,6 +50,25 @@ }; }; + 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>, @@ -453,7 +472,7 @@ &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 */ }; @@ -720,7 +739,7 @@ &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>; |