Hi, I have a question about imx8mm pwm.
(dts)
&pwm1 {
pinctrl-names = "default";
status = "okay";
};
&gpio1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpio1>;
status = "okay";
pwm_en {
gpio-hog;
gpios = <1 GPIO_ACTIVE_HIGH>;
output-high;
line-name = "bkl pwm en";
};
};
pinctrl_gpio1: gpio1_grp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO07_GPIO1_IO7 0x140 /* GPIO0 / CSI0 PWR */
MX8MM_IOMUXC_GPIO1_IO06_GPIO1_IO6 0x140 /* GPIO2 / CSI0 RST */
MX8MM_IOMUXC_GPIO1_IO15_GPIO1_IO15 0x140 /* TEST# */
MX8MM_IOMUXC_GPIO1_IO01_PWM1_OUT 0x140
>;
};
(Result)
The following pwm command is executed. However, the signal from the pwm port doesn't work.
cat /sys/class/pwm/pwmchip0/npwm
echo 0 > /sys/class/pwm/pwmchip0/export
ll /sys/class/pwm/pwmchip0/pwm0/
echo 10000 > /sys/class/pwm/pwmchip0/pwm0/period
echo 2000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle
echo 1 > /sys/class/pwm/pwmchip0/pwm0/enable
