PWM control: channel B didn't appeared in sysfs after canging pin mode

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1

Hello,

I connected two pins on P9 header to EHRPWM0 peripheral (channels A and B).
Channel A is visible whereas B not.

debian@beaglebone:/sys/class/pwm/pwmchip1$ sudo show-pins | sort

…

P9.21 / spi boot in 85 fast rx down 3 pwm 0 out B ocp/P9_21_pinmux (pinmux_P9_21_pwm_pin)
P9.22 / spi boot clk 84 fast rx down 3 pwm 0 out A ocp/P9_22_pinmux (pinmux_P9_22_pwm_pin)
…

debian@beaglebone:/sys/class/pwm/pwmchip1$ ls
device export npwm power pwm-1:0 subsystem uevent unexport
debian@beaglebone:/sys/class/pwm/pwmchip1$

pwm-1:1 is missed. Why ?

Sincerely,

Pavel.

2

Did you export channel 1?

debian@bbb-pwr01-ser09:/sys/class/pwm/pwmchip1$ echo 0 > export
debian@bbb-pwr01-ser09:/sys/class/pwm/pwmchip1$ echo 1 > export

Regards,

3

Thanks !