DTC: non-existing node

Hi suppamax,

You may be missing an alias for the AXI_counter_0 instance within your device tree source file.

Can you post the contents of that file in the thread here?

Regards,

-Kevin

Here it is

/*
* Device Tree Generator version: 1.1
*
* (C) Copyright 2007-2013 Xilinx, Inc.
* (C) Copyright 2007-2013 Michal Simek
* (C) Copyright 2007-2012 PetaLogix Qld Pty Ltd
*
* Michal SIMEK <monstr@monstr.eu>
*
* CAUTION: This file is automatically generated by HSM.
* Version: HSM
* Today is: Sunday, the 22 of February, 2015; 16:27:49
*
* project directory: device-tree_bsp_1
*/

/dts-v1/;
/ {
t#address-cells = <1>;
t#size-cells = <1>;
tcompatible = "xlnx,zynq-7000";
tmodel = "Xilinx Zynq";
taliases {
ttethernet0 = &ps7_ethernet_0;
ttserial0 = &ps7_uart_1;
ttspi0 = &ps7_qspi_0;
t} ;
tchosen {
ttbootargs = "console=ttyPS0,115200 root=/dev/ram rw ip=:::::eth0:dhcp earlyprintk";
ttlinux,stdout-path = "/amba@0/serial@e0001000";
t} ;
tcpus {
tt#address-cells = <1>;
tt#size-cells = <0>;
ttps7_cortexa9_0: cpu@0 {
tttbus-handle = <&ps7_axi_interconnect_0>;
tttclock-latency = <1000>;
tttclocks = <&clkc 3>;
tttcompatible = "arm,cortex-a9";
tttdevice_type = "cpu";
tttinterrupt-handle = <&ps7_scugic_0>;
tttoperating-points = <666667 1000000 333334 1000000 222223 1000000>;
tttreg = <0x0>;
tt} ;
ttps7_cortexa9_1: cpu@1 {
tttbus-handle = <&ps7_axi_interconnect_0>;
tttclocks = <&clkc 3>;
tttcompatible = "arm,cortex-a9";
tttdevice_type = "cpu";
tttinterrupt-handle = <&ps7_scugic_0>;
tttreg = <0x1>;
tt} ;
t} ;
tpmu {
ttcompatible = "arm,cortex-a9-pmu";
ttinterrupt-parent = <&ps7_scugic_0>;
ttinterrupts = <0 5 4>, <0 6 4>;
ttreg = <0xf8891000 0x1000>, <0xf8893000 0x1000>;
ttreg-names = "cpu0", "cpu1";
t} ;
tps7_ddr_0: memory@0 {
ttdevice_type = "memory";
ttreg = <0x0 0x40000000>;
t} ;
tps7_axi_interconnect_0: amba@0 {
tt#address-cells = <1>;
tt#size-cells = <1>;
ttcompatible = "xlnx,ps7-axi-interconnect-1.00.a", "simple-bus";
ttranges ;
ttaxi_dma_0: axidma@40400000 {
ttt#address-cells = <1>;
ttt#size-cells = <1>;
tttcompatible = "xlnx,axi-dma";
tttranges = <0x40400000 0x40400000 0x10000>;
tttreg = <0x40400000 0x10000>;
tttxlnx,include-sg ;
tttdma-channel@40400030 {
ttttaxistream-connected-slave = <&AXI_counter_0>;
ttttaxistream-control-connected-slave = <&AXI_counter_0>;
ttttcompatible = "xlnx,axi-dma-s2mm-channel";
ttttxlnx,datawidth = <0x20>;
ttttxlnx,device-id = <0x0>;
ttt} ;
tt} ;
ttps7_afi_0: ps7-afi@f8008000 {
tttcompatible = "xlnx,ps7-afi-1.00.a";
tttreg = <0xf8008000 0x1000>;
tt} ;
ttps7_afi_1: ps7-afi@f8009000 {
tttcompatible = "xlnx,ps7-afi-1.00.a";
tttreg = <0xf8009000 0x1000>;
tt} ;
ttps7_afi_2: ps7-afi@f800a000 {
tttcompatible = "xlnx,ps7-afi-1.00.a";
tttreg = <0xf800a000 0x1000>;
tt} ;
ttps7_afi_3: ps7-afi@f800b000 {
tttcompatible = "xlnx,ps7-afi-1.00.a";
tttreg = <0xf800b000 0x1000>;
tt} ;
ttps7_clockc_0: ps7-clockc@0 {
tttcompatible = "xlnx,ps7-clockc-1.00.a";
tttxlnx,has-modem = <0x0>;
tttxlnx,input-crystal-freq-hz = <0x1f78a40>;
tt} ;
ttps7_ddrc_0: ps7-ddrc@f8006000 {
tttcompatible = "xlnx,zynq-ddrc-1.0";
tttreg = <0xf8006000 0x1000>;
tttxlnx,has-ecc = <0x0>;
tt} ;
ttps7_dev_cfg_0: ps7-dev-cfg@f8007000 {
tttclock-names = "ref_clk", "fclk0", "fclk1", "fclk2", "fclk3";
tttclocks = <&clkc 12>, <&clkc 15>, <&clkc 16>, <&clkc 17>, <&clkc 18>;
tttcompatible = "xlnx,zynq-devcfg-1.0";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 8 4>;
tttreg = <0xf8007000 0x100>;
tt} ;
ttps7_dma_s: ps7-dma@f8003000 {
ttt#dma-cells = <1>;
ttt#dma-channels = <8>;
ttt#dma-requests = <4>;
tttclock-names = "apb_pclk";
tttclocks = <&clkc 27>;
tttcompatible = "arm,primecell", "arm,pl330";
tttinterrupt-names = "abort", "dma0", "dma1", "dma2", "dma3",
tttt"dma4", "dma5", "dma6", "dma7";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 13 4>, <0 14 4>, <0 15 4>, <0 16 4>, <0 17 4>, <0 40 4>, <0 41 4>, <0 42 4>, <0 43 4>;
tttreg = <0xf8003000 0x1000>;
tt} ;
ttps7_ethernet_0: ps7-ethernet@e000b000 {
ttt#address-cells = <1>;
ttt#size-cells = <0>;
tttclock-names = "ref_clk", "aper_clk";
tttclocks = <&clkc 13>, <&clkc 30>;
tttcompatible = "xlnx,ps7-ethernet-1.00.a";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 22 4>;
tttlocal-mac-address = [00 0a 35 00 00 00];
tttphy-handle = <&phy0>;
tttphy-mode = "rgmii-id";
tttreg = <0xe000b000 0x1000>;
tttxlnx,eth-mode = <0x1>;
tttxlnx,has-mdio = <0x1>;
tttxlnx,ptp-enet-clock = <110000000>;
tttmdio {
tttt#address-cells = <1>;
tttt#size-cells = <0>;
ttttphy0: phy@7 {
tttttcompatible = "marvell,88e1116r";
tttttdevice_type = "ethernet-phy";
tttttreg = <7>;
tttt} ;
ttt} ;
tt} ;
ttps7_globaltimer_0: ps7-globaltimer@f8f00200 {
tttclocks = <&clkc 4>;
tttcompatible = "arm,cortex-a9-global-timer";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <1 11 0x301>;
tttreg = <0xf8f00200 0x100>;
tt} ;
ttps7_gpio_0: ps7-gpio@e000a000 {
ttt#gpio-cells = <2>;
tttclocks = <&clkc 42>;
tttcompatible = "xlnx,zynq-gpio-1.0";
tttemio-gpio-width = <64>;
tttgpio-controller ;
tttgpio-mask-high = <0x0>;
tttgpio-mask-low = <0x5600>;
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 20 4>;
tttreg = <0xe000a000 0x1000>;
tt} ;
ttps7_iop_bus_config_0: ps7-iop-bus-config@e0200000 {
tttcompatible = "xlnx,ps7-iop-bus-config-1.00.a";
tttreg = <0xe0200000 0x1000>;
tt} ;
ttps7_ocmc_0: ps7-ocmc@f800c000 {
tttcompatible = "xlnx,zynq-ocmc-1.0";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 3 4>;
tttreg = <0xf800c000 0x1000>;
tt} ;
ttps7_pl310_0: ps7-pl310@f8f02000 {
tttarm,data-latency = <3 2 2>;
tttarm,tag-latency = <2 2 2>;
tttcache-level = <2>;
tttcache-unified ;
tttcompatible = "arm,pl310-cache";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 2 4>;
tttreg = <0xf8f02000 0x1000>;
tt} ;
ttps7_pmu_0: ps7-pmu@f8891000 {
ttt#address-cells = <1>;
ttt#size-cells = <1>;
tttcompatible = "xlnx,ps7-pmu-1.00.a";
tttranges = <0xf8891000 0xf8891000 0x1000 0xf8893000 0xf8893000 0x1000>;
tt} ;
ttps7_qspi_0: ps7-qspi@e000d000 {
tttclock-names = "ref_clk", "aper_clk";
tttclocks = <&clkc 10>, <&clkc 43>;
tttcompatible = "xlnx,zynq-qspi-1.0";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 19 4>;
tttis-dual = <0>;
tttnum-chip-select = <1>;
tttreg = <0xe000d000 0x1000>;
tttxlnx,fb-clk = <0x1>;
tttxlnx,qspi-mode = <0x0>;
tt} ;
ttps7_qspi_linear_0: ps7-qspi-linear@fc000000 {
tttclock-names = "ref_clk", "aper_clk";
tttclocks = <&clkc 10>, <&clkc 43>;
tttcompatible = "xlnx,ps7-qspi-linear-1.00.a";
tttreg = <0xfc000000 0x1000000>;
tt} ;
ttps7_scugic_0: ps7-scugic@f8f01000 {
ttt#address-cells = <2>;
ttt#interrupt-cells = <3>;
ttt#size-cells = <1>;
tttcompatible = "arm,cortex-a9-gic", "arm,gic";
tttinterrupt-controller ;
tttnum_cpus = <2>;
tttnum_interrupts = <96>;
tttreg = <0xf8f01000 0x1000>, <0xf8f00100 0x100>;
tt} ;
ttps7_scutimer_0: ps7-scutimer@f8f00600 {
tttclocks = <&clkc 4>;
tttcompatible = "arm,cortex-a9-twd-timer";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <1 13 0x301>;
tttreg = <0xf8f00600 0x20>;
tt} ;
ttps7_scuwdt_0: ps7-scuwdt@f8f00620 {
tttclocks = <&clkc 4>;
tttcompatible = "xlnx,ps7-scuwdt-1.00.a";
tttdevice_type = "watchdog";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <1 14 0x301>;
tttreg = <0xf8f00620 0xe0>;
tt} ;
ttps7_sd_0: ps7-sdio@e0100000 {
tttclock-frequency = <51000000>;
tttclock-names = "clk_xin", "clk_ahb";
tttclocks = <&clkc 21>, <&clkc 32>;
tttcompatible = "arasan,sdhci-8.9a";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 24 4>;
tttreg = <0xe0100000 0x1000>;
tttxlnx,has-cd = <0x1>;
tttxlnx,has-power = <0x0>;
tttxlnx,has-wp = <0x1>;
tt} ;
ttps7_slcr_0: ps7-slcr@f8000000 {
ttt#address-cells = <1>;
ttt#size-cells = <1>;
tttcompatible = "xlnx,zynq-slcr", "syscon";
tttranges ;
tttreg = <0xf8000000 0x1000>;
tttclkc: clkc@100 {
tttt#clock-cells = <1>;
ttttclock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x", "cpu_3or2x",
ttttt"cpu_2x", "cpu_1x", "ddr2x", "ddr3x", "dci",
ttttt"lqspi", "smc", "pcap", "gem0", "gem1",
ttttt"fclk0", "fclk1", "fclk2", "fclk3", "can0",
ttttt"can1", "sdio0", "sdio1", "uart0", "uart1",
ttttt"spi0", "spi1", "dma", "usb0_aper", "usb1_aper",
ttttt"gem0_aper", "gem1_aper", "sdio0_aper", "sdio1_aper", "spi0_aper",
ttttt"spi1_aper", "can0_aper", "can1_aper", "i2c0_aper", "i2c1_aper",
ttttt"uart0_aper", "uart1_aper", "gpio_aper", "lqspi_aper", "smc_aper",
ttttt"swdt", "dbg_trc", "dbg_apb";
ttttcompatible = "xlnx,ps7-clkc";
ttttfclk-enable = <0xf>;
ttttps-clk-frequency = <33333333>;
ttttreg = <0x100 0x100>;
ttt} ;
tt} ;
ttps7_ttc_0: ps7-ttc@f8001000 {
tttclocks = <&clkc 6>;
tttcompatible = "cdns,ttc";
tttinterrupt-names = "ttc0", "ttc1", "ttc2";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 10 4>, <0 11 4>, <0 12 4>;
tttreg = <0xf8001000 0x1000>;
tt} ;
ttps7_uart_1: serial@e0001000 {
tttclock-names = "ref_clk", "aper_clk";
tttclocks = <&clkc 24>, <&clkc 41>;
tttcompatible = "xlnx,xuartps";
tttcurrent-speed = <115200>;
tttdevice_type = "serial";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 50 4>;
tttport-number = <0>;
tttreg = <0xe0001000 0x1000>;
tttxlnx,has-modem = <0x0>;
tt} ;
ttps7_usb_0: ps7-usb@e0002000 {
tttclocks = <&clkc 28>;
tttcompatible = "xlnx,ps7-usb-1.00.a", "xlnx,zynq-usb-1.00.a";
tttdr_mode = "host";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 21 4>;
tttphy_type = "ulpi";
tttreg = <0xe0002000 0x1000>;
tttusb-reset = <&ps7_gpio_0 7 0>;
tt} ;
ttps7_xadc: ps7-xadc@f8007100 {
tttclocks = <&clkc 12>;
tttcompatible = "xlnx,zynq-xadc-1.00.a";
tttinterrupt-parent = <&ps7_scugic_0>;
tttinterrupts = <0 7 4>;
tttreg = <0xf8007100 0x20>;
tt} ;
t} ;
} ;

Hi suppamax,

Okay, so since your AXI_counter_0 is a piece of custom IP then I assume you are planning to write a driver for it?

If so, then all you need to do is create an entry in the devicetree that tells the kernel which device driver your AXI_counter_0 instance will use and also point it to where the custom IP is located in memory space.

As part of our "Implementing Linux on the Zynqu00AE-7000 All Programmable SoC (ISE 14.2)" SpeedWay training.  We showed an example custom IP peripheral called "led-brightness" and a Linux driver which allowed access to that peripheral.  Within the devicetree, an entry was needed to tie the device driver to the area of memory where the custom IP was instantiated.

led-brightness@412000000 {
   compatible = "avnet,led-brightness";
   reg = <0x41200000 0x20>;
};

Regards,

-Kevin

Hi zedhead,

thank you for your comment.
I still didn't read your tutorial, I'll do it in the next days.

I have a very stupid question though: do I really need a driver for my IP?
My simple application is:
- the AXI counter stream data (like 0, 1, 2, 3, 4...) to the AXI DMA
- the SW configures the DMA to instruct it about where to store data

Now, I know this can be easily done with a bare metal application, but I need to do this in Linux as an exercise - I will have to manage a more complex project later on.