From: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> This is a specific block embedded into the Baikal-T1 SoC, which is dedicated to detect AXI-bus protocol errors. So the dts node just needs to have the "be,bt1-axi-ehb" compatible string, MMIO registers and interrupts properties declared. Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> Cc: Paul Burton <paulburton@xxxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Olof Johansson <olof@xxxxxxxxx> Cc: soc@xxxxxxxxxx --- .../soc/baikal-t1/be,bt1-axi-ehb.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/baikal-t1/be,bt1-axi-ehb.yaml diff --git a/Documentation/devicetree/bindings/soc/baikal-t1/be,bt1-axi-ehb.yaml b/Documentation/devicetree/bindings/soc/baikal-t1/be,bt1-axi-ehb.yaml new file mode 100644 index 000000000000..f0deeb8f261c --- /dev/null +++ b/Documentation/devicetree/bindings/soc/baikal-t1/be,bt1-axi-ehb.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2019 - 2020 BAIKAL ELECTRONICS, JSC +# +# Baikal-T1 AXI-bus Errors Handler Block Device Tree Bindings. +# +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/baikal-t1/be,bt1-axi-ehb.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Baikal-T1 AXI-bus Errors Handler Block + +maintainers: + - Serge Semin <fancer.lancer@xxxxxxxxx> + +description: | + AXI3-bus is the main communication bus connecting all high-speed peripheral + IP-cores with RAM controller and with MIPS P5600 cores. Traffic arbitration + is done by means of Main Interconnect routing IO request from one block to + another. In case of any protocol error, device not responding an IRQ is + raised and a faulty situation is reported to the AXI EHB described by this + bindings. + +properties: + compatible: + const: be,bt1-axi-ehb + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + +examples: + - | + #include <dt-bindings/interrupt-controller/mips-gic.h> + + axi_ehb: ehb@1F04D110 { + compatible = "be,bt1-axi-ehb"; + reg = <0x1F04D110 0x008>; + + interrupts = <GIC_SHARED 127 IRQ_TYPE_LEVEL_HIGH>; + }; +... -- 2.25.1
