Thread (23 messages) 23 messages, 5 authors, 2022-09-12

RE: [PATCH 2/4] bindings: fpga: Add binding doc for the zynqmp afi config driver

From: Manne, Nava kishore <hidden>
Date: 2022-08-30 05:31:26
Also in: linux-arm-kernel, linux-fpga, lkml

Hi Krzysztof,

	Please find my response inline.
-----Original Message-----
From: Krzysztof Kozlowski <redacted>
Sent: Wednesday, August 24, 2022 6:29 PM
To: Manne, Nava kishore <redacted>; git (AMD-Xilinx)
[off-list ref]; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org;
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Subject: Re: [PATCH 2/4] bindings: fpga: Add binding doc for the zynqmp afi
config driver

On 24/08/2022 06:55, Nava kishore Manne wrote:
quoted
Xilinx Zynq US+ MPSoC platform connect the PS to the programmable
logic(PL) through the AXI port. This AXI port helps to establish
Use subject prefixes matching the subsystem (git log --oneline -- ...).
Will fix in v2.
quoted
the data path between the PS and PL. In-order to establish the proper
communication data path between PS and PL the AXI port data path
should be configured with the proper Bus-width values.

This patch adds the binding document for the zynqmp afi config driver
to handle the AXI port bus-width configurations and PS-PL resets.
Do not use "This commit/patch".
https://elixir.bootlin.com/linux/v5.17.1/source/Documentation/process/sub
mitting-patches.rst#L95
Will fix in v2.
quoted
Signed-off-by: Nava kishore Manne <redacted>
---
 .../bindings/fpga/xlnx,zynqmp-afi-fpga.yaml   | 100 ++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644
Documentation/devicetree/bindings/fpga/xlnx,zynqmp-afi-fpga.yaml

diff --git
a/Documentation/devicetree/bindings/fpga/xlnx,zynqmp-afi-fpga.yaml
b/Documentation/devicetree/bindings/fpga/xlnx,zynqmp-afi-fpga.yaml
new file mode 100644
index 000000000000..faae4951e991
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/xlnx,zynqmp-afi-
fpga.yaml
quoted
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/xlnx,zynqmp-afi-fpga.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx ZynqMP AFI interface Manager.
+
+maintainers:
+  - Nava kishore Manne <nava.kishore.manne@amd.com>
+
+description: The Zynq UltraScale+ MPSoC Processing System core
+provides access
+  from PL masters to PS internal peripherals, and memory through AXI
+FIFO
+  interface(AFI)
+
+properties:
+  compatible:
+    items:
No items, you have only one item.
Will fix in v2.
quoted
+      - enum:
+          - xlnx,zynqmp-afi-fpga
+
+  resets:
+    description:
+      A list of phandles for resets listed in reset-names.
You need maxItems:4
Will fix in v2.
quoted
+
+  reset-names:
+    items:
+      - const: pl0-rst
+      - const: pl1-rst
+      - const: pl2-rst
+      - const: pl3-rst
+
+patternProperties:
+  "^xlnx,afifm[0-6]-rd-bus-width$":
+    description: bus width used to configure the afifm-rd interface.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 32, 64, 128 ]
+
+  "^xlnx,afifm[0-6]-wr-bus-width$":
+    description: bus width used to configure the afifm-wr interface.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 32, 64, 128 ]
+
+  "^xlnx,afifs-ss[0-2]-bus-width$":
+    description: bus width used to configure the afifs interface.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 32, 64, 128 ]
+
+required:
+  - compatible
+  - xlnx,afifm0-rd-bus-width
+  - xlnx,afifm1-rd-bus-width
+  - xlnx,afifm2-rd-bus-width
+  - xlnx,afifm3-rd-bus-width
+  - xlnx,afifm4-rd-bus-width
+  - xlnx,afifm5-rd-bus-width
+  - xlnx,afifm6-rd-bus-width
+  - xlnx,afifm0-wr-bus-width
+  - xlnx,afifm1-wr-bus-width
+  - xlnx,afifm2-wr-bus-width
+  - xlnx,afifm3-wr-bus-width
+  - xlnx,afifm4-wr-bus-width
+  - xlnx,afifm5-wr-bus-width
+  - xlnx,afifm6-wr-bus-width
+  - xlnx,afifs-ss0-bus-width
+  - xlnx,afifs-ss1-bus-width
+  - xlnx,afifs-ss2-bus-width
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/reset/xlnx-zynqmp-resets.h>
+    zynqmp-afi {
Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-
devicetree-basics.html#generic-names-recommendation
Will fix in v2.

Regards,
Navakishore.
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