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Date:   Wed, 27 Feb 2019 15:47:03 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Pavel Pisa <pisa@....felk.cvut.cz>, devicetree@...r.kernel.org
Cc:     Wolfgang Grandegger <wg@...ndegger.com>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Martin Jerabek <martin.jerabek01@...il.com>,
        Ondrej Ille <ondrej.ille@...il.com>
Subject: Re: [PATCH] dt-bindings: net: can: binding for CTU CAN FD open-source
 IP core.

On 2/22/19 2:20 PM, Pavel Pisa wrote:
> From 3e19a7f5c33e5fb50f52c9df05bf00022e3f3dd5 Mon Sep 17 00:00:00 2001
> From: Pavel Pisa <pisa@....felk.cvut.cz>
> Date: Fri, 22 Feb 2019 14:11:11 +0100
> Subject: [PATCH] dt-bindings: net: can: binding for CTU CAN FD open-source IP
>  core.

Nice! I appreciate open-source hardware!

Please send the patch via git send-email, it's a bit broken:

Applying: dt-bindings: net: can: binding for CTU CAN FD open-source IP core.
.git/rebase-apply/patch:29: trailing whitespace.

error: corrupt patch at line 30
Patch failed at 0001 dt-bindings: net: can: binding for CTU CAN FD
open-source IP core.
hint: Use 'git am --show-current-patch' to see the failed patch


> Signed-off-by: Pavel Pisa <pisa@....felk.cvut.cz>
> ---
>  .../devicetree/bindings/net/can/ctu,ctucanfd.txt   | 102 +++++++++++++++++++++
>  1 file changed, 102 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/can/ctu,ctucanfd.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/can/ctu,ctucanfd.txt 
> b/Documentation/devicetree/bindings/net/can/ctu,ctucanfd.txt
> new file mode 100644
> index 000000000000..6c75e5850904
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/ctu,ctucanfd.txt
> @@ -0,0 +1,102 @@
> +Memory mapped CTU CAN FD open-source IP core
> +
> +The core sources and documentation on project page
> +
> +  https://gitlab.fel.cvut.cz/canbus/ctucanfd_ip_core
> +  http://canbus.pages.fel.cvut.cz/ctucanfd_ip_core/Progdokum.pdf
> +
> +Integration in Xilinx Zynq SoC based system together with
> +OpenCores SJA1000 compatible controllers
> +
> +  https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top
> +
> +Martin Jerabek's dimploma thesis with integration and testing
> +framework description
> +
> + 
> https://dspace.cvut.cz/bitstream/handle/10467/80366/F3-DP-2019-Jerabek-Martin-Jerabek-thesis-2019-canfd.pdf
> +
> +Required properties:
> +
> +- compatible : should be one of "ctu,ctucanfd", "ctu,canfd-2".
> +
> +- reg = <(baseaddr) (size)> : specify mapping into physical address
> +      space of the processor system.
> +
> +- interrupts : property with a value describing the interrupt source
> +      required for the CTU CAN FD. For Zynq SoC system format is
> +      <(is_spi) (number) (type)> where is_spi defines if it is SPI
> +      (shared peripheral) interrupt, the second number is translated
> +      to the vector by addition of 32 on Zynq-7000 systems and type
> +      is IRQ_TYPE_LEVEL_HIGH (4) for Zynq.
> +
> +- interrupt-parent = <&interrupt-controller-phandle> :
> +      is required for Zynq SoC to find map interrupt
> +      to the correct controller
> +
> +- clocks: phandle of reference clock (100 MHz is appropriate
> +      for FPGA implementation on Zynq-7000 system).
> +
> +Example when integrated to Zynq-7000 system DTS:
> +
> +        / {
> +            /* ... */
> +            amba: amba {
> +                #address-cells = <1>;
> +                #size-cells = <1>;
> +                compatible = "simple-bus";
> +
> +                CTU_CAN_FD_0: CTU_CAN_FD@...30000 {

It's unusual to have uppercase letters here.

> +                    compatible = "ctu,ctucanfd";

Is ctu already registered in
Documentation/devicetree/bindings/vendor-prefixes.txt ?

> +                    interrupt-parent = <&intc>;
> +                    interrupts = <0 30 4>;
> +                    clocks = <&clkc 15>;
> +                    reg = <0x43c30000 0x10000>;
> +                };
> +            };
> +        };
> +
> +
> +Example when used as DTS overlay on Zynq-7000 system:
> +
> +
> +// Device Tree Example: Full Reconfiguration without Bridges
> +/dts-v1/;
> +/plugin/;
> +
> +/ {
> +    fragment@0 {
> +        target-path = "/fpga-full";
> +
> +        __overlay__ {
> +            #address-cells = <1>;
> +            #size-cells = <1>;
> +
> +            firmware-name = "system.bit.bin";
> +        };
> +    };
> +
> +    fragment@1 {
> +        target-path = "/amba";
> +        __overlay__ {
> +            #address-cells = <1>;
> +            #size-cells = <1>;
> +
> +            CTU_CAN_FD_0: CTU_CAN_FD@...30000 {
> +                compatible = "ctu,ctucanfd";
> +                interrupt-parent = <&intc>;
> +                interrupts = <0 30 4>;
> +                clocks = <&clkc 15>;
> +                //clock-names = "can_clk";

Is this needed or not?

> +                reg = <0x43c30000 0x10000>;
> +            };
> +            CTU_CAN_FD_1: CTU_CAN_FD@...70000 {
> +                compatible = "ctu,ctucanfd";
> +                interrupt-parent = <&intc>;
> +                interrupts = <0 31 4>;
> +                clocks = <&clkc 15>;
> +                //clock-names = "can_clk";

Is this needed or not?

> +                reg = <0x43c70000 0x10000>;
> +            };
> +        };
> +    };
> +};
> 

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |



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