Date: Tue, 28 Aug 2018 01:23:01 +0200 From: Nicola Mingotti <nmingotti@gmail.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: PRU Overlay Problem Message-ID: <9ac1edad-1fbf-0e4d-cb2f-3de077fff7f8@gmail.com>
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Hi ! I am trying to configure the PRU in BeagleBone Black, FreeBSD-12-ALPHA. I found Rolf code online, it compiles and load => I see the PRU https://obsigna.com/articles/1530973669.html Ok, the problem is I would like to configure the pins for the PRU either in the new format that Ian says on in the old one. I tried to modify Rolf code copying from various resources but i failed. I ask your help. I admint this thing for me is in good part obscure. In previous post I saw the DTS sources are here: https://github.com/freebsd/freebsd/tree/master/sys/gnu/dts/arm But, i can't find the file defining the PRU, so I am stuck, i don't know where to copy from;) here is were i landed : --------------------- new style overlay ---------- /dts-v1/; /plugin/; / { compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx"; exclusive-use = "P9.27","P9.28","pru0"; }; &am33xx_pinmux { pru_pru_pins: pinmux_pru_pru_pins { pinctrl-single,pins = < 0x1a4 0x05 /* P9.27 pr1_pru0_pru_r30_5, Mode 5 output pull-down */ 0x19c 0x26 /* P9.28 pr1_pru0_pru_r31_3, Mode 6 input pull-down */ >; }; }; /* &"/" { ummm, problem, doh */ &ocp { #address-cells = <1>; #size-cells = <1>; pruss@4a300000 { status = "okay"; compatible = "ti,pruss-v2"; ti,deassert-hard-reset = "pruss", "pruss"; reg = <0x4a300000 0x080000>; ti,pintc-offset = <0x20000>; interrupt-parent = <&intc>; interrupts = <20 21 22 23 24 25 26 27>; pinctrl-names = "default"; pinctrl-0 = <&pru_pru_pins>; }; }; -------------------------------------- ---------- old style overlay ----------------- /dts-v1/; /plugin/; / { compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx"; exclusive-use = "P9.27","P9.28", "pru0"; pru_pru_pins: pinmux_pru_pru_pins { pinctrl-single,pins = < 0x1a4 0x05 /* P9.27 pr1_pru0_pru_r30_5, Mode 5 output pull-down */ 0x19c 0x26 /* P9.28 pr1_pru0_pru_r31_3, Mode 6 input pull-down */ >; }; fragment@1 { target-path="/"; __overlay__ { ocp { #address-cells = <1>; #size-cells = <1>; pruss@4a300000 { status = "okay"; compatible = "ti,pruss-v2"; ti,deassert-hard-reset = "pruss", "pruss"; reg = <0x4a300000 0x080000>; ti,pintc-offset = <0x20000>; interrupt-parent = <&intc>; interrupts = <20 21 22 23 24 25 26 27>; pinctrl-0 = <&pru_pru_pins>; }; }; }; }; }; --------------------------------------------------- bye Nicola -- -------------------------- Dr. Nicola Mingotti R&D - Borghi Srl CTO - BondInsider --------------------------
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