Hi all,
I have already configured the pins P9_21 and P9_22 for PWM function using
BB-PWM0 overlays.
But now I want to use these pins as UART and some other pins as PWM.
I tried to make P9_14(EHRPWM1A) & P9_16(EHRPWM1B). For this I used the
overlay BB-PWM1.
A part of *BB-PWM1-00A0.dts* is shown here to confirm that BB-PWM1
corresponds to P9_14(EHRPWM1A) & P9_16(EHRPWM1B).
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pinctrl_spec: Panel_Pins {
pinctrl-single,pins = <
0x48 0x06 /* (U14) gpmc_a2.ehrpwm1A */
0x4c 0x06 /* (T14) gpmc_a3.ehrpwm1B */
>;
};
};
};
This is creating a folder pwmchip4 in /sys/class/pwm directory.
Then with the following commands, pwm0 and pwm1 are created in
/sys/class/pwm/pwmchip4 directory.
sudo echo 0 > /sys/class/pwm/pwmchip4/export
sudo echo 1 > /sys/class/pwm/pwmchip4/export
And software written same as in the case of P9_21 and P9_22.
But PWM signals are not appearing in P9_14(EHRPWM1A) & P9_16(EHRPWM1B).
I tried also P8_13(ehrpwm2B) & P8_19(ehrpwm2A) in the same way with
BB-PWM2 overlay.
This is creating a folder pwmchip2 in /sys/class/pwm directory. These are
also not working.
I think I am missing something.
Please help me to find out a solution.
Thanks in advance for the help.
Thanks & Regards,
Sajeevan.K
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