dt-bindings: w1: Add AMD AXI w1 host and MAINTAINERS entry

Add YAML DT schema for the AMD AXI w1 host IP.

This hardware guarantees protocol timing for driving off-board devices
such as thermal sensors, proms, etc using the 1wire protocol.  The IP
has a register to detect hardware version and so the binding does not
have an explicit version number.

Add MAINTAINERS entry for DT schema.

Co-developed-by: Thomas Delev <thomas.delev@amd.com>
Signed-off-by: Thomas Delev <thomas.delev@amd.com>
Signed-off-by: Kris Chaplin <kris.chaplin@amd.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231107180814.615933-2-kris.chaplin@amd.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

diff --git a/Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml b/Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml
new file mode 100644 (file)
index 0000000..ef70fa2
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/w1/amd,axi-1wire-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMD AXI 1-wire bus host for programmable logic
+
+maintainers:
+  - Kris Chaplin <kris.chaplin@amd.com>
+
+properties:
+  compatible:
+    const: amd,axi-1wire-host
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    onewire@a0000000 {
+        compatible = "amd,axi-1wire-host";
+        reg = <0xa0000000 0x10000>;
+        clocks = <&zynqmp_clk 0x47>;
+        interrupts = <GIC_SPI 0x59 IRQ_TYPE_LEVEL_HIGH>;
+    };
+
+...

diff --git a/MAINTAINERS b/MAINTAINERS
index 97f51d5ec1cfd715487a616c78afd40324082dfc..cecf289e4ddc112bc6507ca2f7938feb2b34ffe2 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -893,6 +893,13 @@ Q: https://patchwork.kernel.org/project/linux-rdma/list/
 F:     drivers/infiniband/hw/efa/
 F:     include/uapi/rdma/efa-abi.h
 
+AMD AXI W1 DRIVER
+M:     Kris Chaplin <kris.chaplin@amd.com>
+R:     Thomas Delev <thomas.delev@amd.com>
+R:     Michal Simek <michal.simek@amd.com>
+S:     Maintained
+F:     Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml
+
 AMD CDX BUS DRIVER
 M:     Nipun Gupta <nipun.gupta@amd.com>
 M:     Nikhil Agarwal <nikhil.agarwal@amd.com>