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; michal.simek@xilinx.com; mdf@kernel.org; hao.wu@intel.com; yilun.xu@intel.com; trix@redhat.com; p.zabel@pengutronix.de; gregkh@linuxfoundation.org; ronak.jain@xilinx.com; rajan.vaja@xilinx.com; abhyuday.godhasara@xilinx.com; piyush.mehta@xilinx.com; lakshmi.sai.krishna.potthuri@xilinx.com; harsha.harsha@xilinx.com; linus.walleij@linaro.org; nava.manne@xilinx.com; devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux- kernel@vger.kernel.org; linux-fpga@vger.kernel.org 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 establishUse 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.yamlquoted
@@ -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.