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Subject[PATCH v3 2/6] dt-bindings: net: can: binding for CTU CAN FD open-source IP core.
Date
From: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
---
.../devicetree/bindings/net/can/ctu,ctucanfd.txt | 61 ++++++++++++++++++++++
1 file changed, 61 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..4cb2f04cb412
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/ctu,ctucanfd.txt
@@ -0,0 +1,61 @@
+Memory Mapped CTU CAN FD Open-source IP Core Device Tree Bindings
+-----------------------------------------------------------------
+
+
+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".
+ The "canfd-2" has been reserved for older revision of the IP core.
+ The revision can be read from the IP core register as well.
+
+- 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.
+
+- clocks: phandle of reference clock (100 MHz is appropriate
+ for FPGA implementation on Zynq-7000 system).
+
+Optional properties:
+
+- clock-names: not used in actual design but if more clocks are used
+ by cores then "can_clk" would be clock source name for the clocks
+ used to define CAN time-quanta.
+
+Example when integrated to Zynq-7000 system DTS:
+
+ / {
+ /* ... */
+ amba: amba {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "simple-bus";
+
+ ctu_can_fd_0: can@43c30000 {
+ compatible = "ctu,ctucanfd";
+ interrupts = <0 30 4>;
+ clocks = <&clkc 15>;
+ reg = <0x43c30000 0x10000>;
+ };
+ };
+ };
--
2.11.0
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