Part Number: AM3352
Tool/software: Linux
Dear champs,
It seemed GPIO3 can be used as wakeup source at standby mode, but my customer failed to implement wakeup.
Is it possible to use GPIO3 for wakeup source at standby mode?
My customer implemented it referring below e2e, but failed to make it working.
my customer implemented it as below.
they added red color parts in dts file as below.
linux/arch/arm/boot/dts/am33xx.dtsi
gpio3: gpio@481ae000 {
compatible = "ti,omap4-gpio";
ti,hwmods = "gpio4";
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
reg = <0x481ae000 0x1000>;
interrupts = <62>;
ti,no-idle;
};
linux/arch/arm/boot/dts/am335x-boneblack.dts
mcasp0_pins_sleep: mcasp0_pins_sleep {
pinctrl-single,pins = <
0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_ahclkx.mcasp0_ahclkx */
0x19c (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_ahclkr.mcasp0_axr2 */
0x194 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_fsx.mcasp0_fsx */
0x190 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_aclkx.mcasp0_aclkx */
0x06c (PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_a11.GPIO1_27 */
>;
};
gpio3_pins: pinmux_gpio3_pins {
pinctrl-single,pins = <
0x1a4 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* Set GPIO3_19 */
0x1ac (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* Set GPIO3_21 */
>;
};
gpio_buttons: gpio_buttons@0 {
compatible = "gpio-keys";
#address-cells = <1>;
#size-cells = <0>;
switch@1 {
label = "button0";
linux,code = <0x102>;
gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
gpio-key,wakeup;
};
};
};
Could you please check what is wrong in their modification?
Their SW is as below.
PDK : 02.00.01.07
u-boot : u-boot-2015.07+gitAUTOINC+5922e09363
kernel : linux-4.1.13+gitAUTOINC+8dc66170d9-g8dc6617
M3 : CM3 Firmware Version = 0x191
Thanks and Best Regards,
SI.
