I've had that part in the .dts :
&ocp{
torout: torout {
pinctrl-names = "default";
pinctrl-0 = <&tor_output_pins>;
status = "okay";
};
torin: torin {
pinctrl-names = "default";
pinctrl-0 = <&tor_input_pins>;
status = "okay";
};
};
I think i'm close to get this work but I've probably missed something ...
any idea ?
Le mardi 18 août 2015 14:01:41 UTC+2, Paco Dupont a écrit :
>
> I need to modify the default configuration of pinmuxing on the BBB. To do
> so i'm trying to modify the am335x-boneblack.dts before recompiling the
> kernel. But that file is very awkward. I've only found information about
> overlay, but i need this to be default not overlay.
>
> I've tried to write my one am335x-boneblack.dts, deleted every things
> related to HDMI, modified the include to am335x-bone-common-no-capemgr.dtsi
> :
>
> /*
> * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 as
> * published by the Free Software Foundation.
> */
> /dts-v1/;
>
> #include "am33xx.dtsi"
> #include "am335x-bone-common-no-capemgr.dtsi"
>
> / {
> model = "TI AM335x BeagleBone Black";
> compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
> };
>
> &ldo3_reg {
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> };
>
> &mmc1 {
> vmmc-supply = <&vmmcsd_fixed>;
> };
>
> &mmc2 {
> vmmc-supply = <&vmmcsd_fixed>;
> pinctrl-names = "default";
> pinctrl-0 = <&emmc_pins>;
> bus-width = <8>;
> status = "okay";
> };
>
> &am33xx_pinmux {
>
> tor_output_pins: tor_output_pins {
> pinctrl-single,pins = <
> 0x078 0x07 /* P9_12 OUTPUT | MODE7 | PULLDOWN */
> 0x048 0x07 /* P9_14 OUTPUT | MODE7 | PULLDOWN */
> 0x040 0x07 /* P9_15 OUTPUT | MODE7 | PULLDOWN */
> 0x04c 0x07 /* P9_16 OUTPUT | MODE7 | PULLDOWN */
> 0x15c 0x07 /* P9_17 OUTPUT | MODE7 | PULLDOWN */
> 0x158 0x07 /* P9_18 OUTPUT | MODE7 | PULLDOWN */
> 0x044 0x07 /* P9_23 OUTPUT | MODE7 | PULLDOWN */
> 0x1ac 0x07 /* P9_25 OUTPUT | MODE7 | PULLDOWN */
> >;
> };
>
> tor_input: tor_input {
> pinctrl-single,pins = <
> 0x030 0x27 /* P8_12 INPUT | MODE7 | PULLDOWN */
> 0x024 0x27 /* P8_13 INPUT | MODE7 | PULLDOWN */
> 0x028 0x27 /* P8_14 INPUT | MODE7 | PULLDOWN */
> 0x03c 0x27 /* P8_15 INPUT | MODE7 | PULLDOWN */
> 0x038 0x27 /* P8_16 INPUT | MODE7 | PULLDOWN */
> 0x02c 0x27 /* P8_17 INPUT | MODE7 | PULLDOWN */
> 0x08c 0x27 /* P8_18 INPUT | MODE7 | PULLDOWN */
> 0x020 0x27 /* P8_19 INPUT | MODE7 | PULLDOWN */
> >;
> };
>
> };
>
>
>
> Booting from uboot using TFTP :
>
> tftpboot 0x80F80000 am335x-bone-custom.dtb
> tftpboot 0x80007FC0 uImage-BBB
>
>
>
> Then looking at pins configuration :
>
> root@arm:~# cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pins|grep 95c
> pin 87 (44e1095c.0) 00000062 pinctrl-single
>
>
> Should output :
>
> pin 87 (44e1095c.0) 00000007 pinctrl-single
>
>
>
> Why changes didn't take effect ? Did i missed something ?
>
> Thank you for your time.
>
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