| Hi Mailinglist, I currently work on a project to connect 4 MEMS microfones (ICS-52000) via TDM to a beaglebone green. The beaglebone green boots from SD-card and it freezes at startup, so i can't check, what is going on (all 4 LEDs constantly on). McASP must be clock master like in https://invensense.tdk.com/wp-content/uploads/2016/05/DS-000121-ICS-52000-v1.3.pdf Figure 9. The device tree overlay location is given in /boot/uEnv.txt: #Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0 uname_r=4.14.71-ti-r80 #uuid= #dtb= ###U-Boot Overlays### ###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays ###Master Enable enable_uboot_overlays=1 ### ###Overide capes with eeprom #uboot_overlay_addr0=/lib/firmware/<file0>.dtbo #uboot_overlay_addr1=/lib/firmware/<file1>.dtbo #uboot_overlay_addr2=/lib/firmware/<file2>.dtbo #uboot_overlay_addr3=/lib/firmware/<file3>.dtbo ### ###Additional custom capes uboot_overlay_addr4=/lib/firmware/ICS-52000-4mics-00A0.dtbo #uboot_overlay_addr5=/lib/firmware/<file5>.dtbo #uboot_overlay_addr6=/lib/firmware/<file6>.dtbo #uboot_overlay_addr7=/lib/firmware/<file7>.dtbo ### ###Custom Cape #dtb_overlay=/lib/firmware/<file8>.dtbo ### ###Disable auto loading of virtual capes (emmc/video/wireless/adc) #disable_uboot_overlay_emmc=1 #disable_uboot_overlay_video=1 #disable_uboot_overlay_audio=1 #disable_uboot_overlay_wireless=1 #disable_uboot_overlay_adc=1 ### ###PRUSS OPTIONS ###pru_rproc (4.4.x-ti kernel) #uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo ###pru_rproc (4.14.x-ti kernel) uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo ###pru_uio (4.4.x-ti, 4.14.x-ti & mainline/bone kernel) #uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo ### ###Cape Universal Enable enable_uboot_cape_universal=1 ### ###Debug: disable uboot autoload of Cape #disable_uboot_overlay_addr0=1 #disable_uboot_overlay_addr1=1 #disable_uboot_overlay_addr2=1 #disable_uboot_overlay_addr3=1 ### The device tree overlay looks as follows (ICS-52000-4mics-00A0.dts): /* * device tree overlay for BeagleBone Green with 4 ICS-52000 MEMS microphones * * Author: Winfried Ritsch <ritsch@xxxxxx> * edited by Manuel Planton * * based on BeagleBone Black and BeagleBone Green device tree * * 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. * compile with * dtc -O dtb -o /lib/firmware/ICS-52000-4mics-00A0.dtbo -b 0 -@ ICS-52000-4mics-00A0.dts * */ /dts-v1/; /plugin/; / { compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green"; /* identification */ part-number = "BB_ICS52000-4CH"; version = "00A0", "A0"; /* state the resources this cape uses */ exclusive-use = /* audio */ "P9.30", /* mcasp0_axr0 audio in */ "P9.12", /* mcasp0_aclkr receive bitclock */ "P9.27", /* mcasp0_fsr receive frameclock */ "mcasp0"; fragment@0 { target = <&am33xx_pinmux>; __overlay__ { mcasp0_pins: pinmix_mcasp0_pins { pinctrl-single,pins = < 0x198 0x20 /* mcasp0_axr0, MODE0 | INPUT_PULLDOWN | P9_30 */ 0x078 0x06 /* mcasp0_aclkr, MODE6 | OUTPUT_PULLDOWN | P9_12 */ 0x1a4 0x00 /* mcasp0_fsr, MODE0 | OUTPUT_PULLDOWN | P9_27 */ >; }; }; }; fragment@1 { target = <&mcasp0>; __overlay__ { pinctrl-names = "default"; pinctrl-0 = <&mcasp0_pins>; status = "okay"; op-mode = <0>; /* MCASP_IIS_MODE */ tdm-slots = <4>; num-serializer = <16>; serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */ 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 >; tx-num-evt = <0>; rx-num-evt = <32>; }; }; fragment@2 { target = <&ocp>; __overlay__ { ics52000: ics52000 { compatible = "invensense,ics52000"; }; codec: spdifr { compatible = "linux,spdif-dir"; }; sound { compatible = "simple-audio-card"; model = "MEMSAAMA"; simple-audio-card,name = "MEMSAAMA"; simple-audio-card,format = "i2s"; simple-audio-card,bitclock-master = <&sound_master>; simple-audio-card,frame-master = <&sound_master>; sound_master: simple-audio-card,cpu { sound-dai = <&mcasp0>; clocks = <&clk_mcasp0>; }; simple-audio-card,codec { sound-dai = <&none>; }; }; }; }; }; and the compilation of the DTO on the beaglebone outputs these warnings: debian@beaglebone:~$ sudo dtc -O dtb -o /lib/firmware/ICS-52000-4mics-00A0.dtbo -b 0 -@ ICS-52000-4mics-00A0.dts [sudo] password for debian: /lib/firmware/ICS-52000-4mics-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@0 has a unit name, but no reg property /lib/firmware/ICS-52000-4mics-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@1 has a unit name, but no reg property /lib/firmware/ICS-52000-4mics-00A0.dtbo: Warning (unit_address_vs_reg): Node /fragment@2 has a unit name, but no reg property The system: debian@beaglebone:~$ uname -a Linux beaglebone 4.14.71-ti-r80 #1 SMP PREEMPT Fri Oct 5 23:50:11 UTC 2018 armv7l GNU/Linux I can comment the line for the DTO in /boot/uEnv.txt on the SD-card and the BBG starts just fine. Do you have a suggestion, what could be wrong? I'm stuck at this point without getting the BBG to boot with the device tree overlay. Kind regards Manuel |
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