Question
GPIO input state by default.
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Hello,
I am trying to set few pins as input states by default right after boot and power on state so I have written 2 nodes:-
turn_latch_if {
compatible = "gpio";
status = "okay";
turn_dc_dc_conv_off {
label = "TURN_DC_DC_CONV_OFF";
gpios = <&gpiog 4 GPIO_ACTIVE_LOW>; /* PG4 */
status = "okay";
};
turn_bat_charge_off {
label = "TURN_BAT_CHARGE_OFF";
gpios = <&gpiog 6 GPIO_ACTIVE_LOW>; /* PG6 */
status = "okay";
};
bat_charge_status {
label = "BAT_CHARGE_STATUS";
gpios = <&gpiog 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PG7 */
status = "okay";
};
lrelay_status {
label = "LRELAY_STATUS";
gpios = <&gpioa 9 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PA9 */
status = "okay";
};
latching_relay {
label = "LATCHING_RELAY";
gpios = <&gpioj 6 GPIO_ACTIVE_LOW>; /* PJ6 */
status = "okay";
};
};
digio_if {
compatible = "gpio";
status = "okay";
/* Digital inputs D1..D4 on GPIOB (PB0..PB3) */
dig_in1 {
label = "DIG_IN1";
gpios = <&gpiob 0 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB0 */
status = "okay";
};
dig_in2 {
label = "DIG_IN2";
gpios = <&gpiob 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB1 */
status = "okay";
};
dig_in3 {
label = "DIG_IN3";
gpios = <&gpiob 2 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB2 */
status = "okay";
};
dig_in4 {
label = "DIG_IN4";
gpios = <&gpiob 3 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB3 */
status = "okay";
};
/* Digital I/O lines D5..D7 on GPIOB (PB4..PB6) */
dig_io5 {
label = "DIG_IO5";
gpios = <&gpiob 4 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB4 */
status = "okay";
};
dig_io6 {
label = "DIG_IO6";
gpios = <&gpiob 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB5 */
status = "okay";
};
dig_io7 {
label = "DIG_IO7";
gpios = <&gpiob 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB6 */
status = "okay";
};
/* Digital I/O 8 on PB9 */
dig_io8 {
label = "DIG_IO8";
gpios = <&gpiob 9 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* PB9 */
status = "okay";
};
/* Digital output enables EN5..EN8 on GPIOD (PD1..PD4) */
dig_out_en5 {
label = "DIG_OUT_EN5";
gpios = <&gpiod 1 GPIO_ACTIVE_LOW>; /* PD1 */
status = "okay";
};
dig_out_en6 {
label = "DIG_OUT_EN6";
gpios = <&gpiod 2 GPIO_ACTIVE_LOW>; /* PD2 */
status = "okay";
};
dig_out_en7 {
label = "DIG_OUT_EN7";
gpios = <&gpiod 3 GPIO_ACTIVE_LOW>; /* PD3 */
status = "okay";
};
dig_out_en8 {
label = "DIG_OUT_EN8";
gpios = <&gpiod 4 GPIO_ACTIVE_LOW>; /* PD4 */
status = "okay";
};
/* Digital outputs D1..D8 on various ports:
PC4, PC6, PC8, PC9, PC10, PC12, PD0, PZ7 */
dig_out1 {
label = "DIG_OUT1";
gpios = <&gpioc 4 GPIO_ACTIVE_LOW>; /* PC4 */
status = "okay";
};
dig_out3 {
label = "DIG_OUT3";
gpios = <&gpioc 8 GPIO_ACTIVE_LOW>; /* PC8 */
status = "okay";
};
dig_out4 {
label = "DIG_OUT4";
gpios = <&gpioc 9 GPIO_ACTIVE_LOW>; /* PC9 */
status = "okay";
};
dig_out5 {
label = "DIG_OUT5";
gpios = <&gpioc 10 GPIO_ACTIVE_LOW>; /* PC10 */
status = "okay";
};
dig_out6 {
label = "DIG_OUT6";
gpios = <&gpioc 12 GPIO_ACTIVE_LOW>; /* PC12 */
status = "okay";
};
dig_out7 {
label = "DIG_OUT7";
gpios = <&gpiod 0 GPIO_ACTIVE_LOW>; /* PD0 */
status = "okay";
};
dig_out8 {
label = "DIG_OUT8";
gpios = <&gpioc 6 GPIO_ACTIVE_LOW>; /* PZ7 */
status = "okay";
};
};In this list I am trying to put:- dig_in1, dig_in2, dig_in3, dig_in4, dig_io5, dig_io6, dig_io7, dig_io8, lrelay_status, bat_charge_status these pins to be in input state during power on and after boot modes.
Should I have to modify any other file in my yocto of STM32MP257F-EV1 based yocto directory to achieve this.
When reading thier states are 1,1,1,1,0,0,0,1,0,1
dig_in1, dig_in2, dig_in3, dig_in4, dig_io5, dig_io6, dig_io7, dig_io8, lrelay_status, bat_charge_status respectively.