For a MX28 based hardware I am working with I need to use AUART4
I need to configure this AUART4 as uart only when necessary and at all
other times pins associated with AUART4 need to be configured as inputs.
I am using following DT definitions to setup AUART4 mux but can't
figure out how to setup pin direction via DT, can it be done or I need
to do it in C code?
apb@80000000 {
apbh@80000000 {
auart4_pins_a: auart4@0 {
reg = <0>;
fsl,pinmux-ids = <
0x3142 /*
MX28_PAD_SAIF0_MCLK__AUART4_CTS */
0x3152 /*
MX28_PAD_SAIF0_LRCLK__AUART4_RTS */
0x3162 /*
MX28_PAD_SAIF0_BITCLK__AUART4_RX */
0x3172 /*
MX28_PAD_SAIF0_SDATA0__AUART4_TX */
>;
fsl,drive-strength = <0>;
fsl,voltage = <1>;
fsl,pull-up = <0>;
};
auart4_highz_pins: auart4-gpio@0 {
reg = <0>;
fsl,pinmux-ids = <
0x3143 /*
MX28_PAD_SAIF0_MCLK__GPIO_3_20 */
0x3153 /*
MX28_PAD_SAIF0_LRCLK__GPIO_3_21 */
0x3163 /*
MX28_PAD_SAIF0_BITCLK__GPIO_3_22 */
0x3173 /*
MX28_PAD_SAIF0_SDATA0__GPIO_3_23 */
>;
fsl,drive-strength = <0>;
fsl,voltage = <1>;
fsl,pull-up = <0>;
};
};
};
apbx@80040000 {
auart4: serial@80072000 {
pinctrl-names = "default", "auart";
pinctrl-0 = <&auart4_highz_pins>;
pinctrl-1 = <&auart4_pins_a>;
status = "okay";
};
};
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