Date: Thu, 6 Jun 2019 12:33:08 -0700 From: Nicola Mingotti <nmingotti@gmail.com> To: freebsd-arm@freebsd.org Cc: nmingott@gmail.com Subject: How to set PWM tunable name to ehrpwm.1 ? Message-ID: <68790975-a5a5-2138-ca89-117878d6cf2d@gmail.com>
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Hi,
In my BeagleBone Black, FreeBSD-12 RELEASE, i created two overlays,
pwm.dtso and pwm1.dtso. They enable the PWM pins p9.21, p9.22 and
respectively p9.14, p9.16. DTSO files are below.
If I load both the DTBO at boot I see correctly|ehrpwm.0|and|ehrpwm.1|,
associated to the correct pins. But, if i remove the
overlay|pwm.dtbo|then i seen only|ehrpwm.0|in|sysctl -a|, which is not
what i want, i would like to see the name|ehrpwm.1|.
This is important because i must be 100% sure a certain pin corresponds
the a certain tunable.This must be true even if i remove non relevant
overlays in the future. I guess there must be some parameter in the DTSO
which i don't know, i hope you can give me some directions about that.
bye
Nicola
-------- pwm.dtso -----------------
|/dts-v1/; /plugin/; / { compatible = "ti,am335x-bone-black",
"ti,am335x-bone", "ti,am33xx"; exclusive-use =
"P9.21","P9.22","ehrpwm0_AB"; }; &am33xx_pinmux { ehrpwm0_AB_pins:
pinmux_ehrpwm0_AB_pins { pinctrl-single,pins = < 0x154 0x03 /* P9.21 */
0x150 0x03 /* P9.22 */ >; }; }; &ehrpwm0 { status = "okay";
pinctrl-names = "default"; pinctrl-0 = <&ehrpwm0_AB_pins>; }; &epwmss0 {
status = "okay"; }; &ecap0 { status = "okay"; };
-----------------------------------------------------------
--------------------- pwm1.dtso -------------------------- |
||/dts-v1/; /plugin/; / { compatible = "ti,am335x-bone-black",
"ti,am335x-bone", "ti,am33xx"; exclusive-use =
"P9.14","P9.16","ehrpwm1_AB"; }; &am33xx_pinmux { ehrpwm1_AB_pins:
pinmux_ehrpwm1_AB_pins { pinctrl-single,pins = < 0x048 0x06 /* P9.14 */
0x04C 0x06 /* P9.16 */ >; }; }; &ehrpwm1 { status = "okay";
pinctrl-names = "default"; pinctrl-0 = <&ehrpwm1_AB_pins>; }; &epwmss1 {
status = "okay"; }; &ecap1 { status = "okay"; };
|----------------------------------------------------------- |
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