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[SRU,jammy:linux-xilinx-zynqmp,1/4] dt-bindings: w1: Add AMD AXI w1 host and MAINTAINERS entry

Message ID 20240402025911.2415733-2-portia.stephens@canonical.com
State New
Headers show
Series Backport AXI 1-wire host driver | expand

Commit Message

Portia Stephens April 2, 2024, 2:59 a.m. UTC 
From: Kris Chaplin <kris.chaplin@amd.com>

BugLink: https://bugs.launchpad.net/bugs/2058707

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>
(cherry picked from commit 3427fa5b32bbf54e51a2fde347a88161ff16a641)
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
---
 .../bindings/w1/amd,axi-1wire-host.yaml       | 44 +++++++++++++++++++
 MAINTAINERS                                   |  7 +++
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml
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Patch

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
index 000000000000..ef70fa2c0c5d
--- /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 e5299a48cac0..4d91fba92e8a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -897,6 +897,13 @@  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 CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER
 M:	Tom Lendacky <thomas.lendacky@amd.com>
 M:	John Allen <john.allen@amd.com>