Re: [PATCH v2 1/2] dt-bindings: reset: Add YAML schemas for the Intel Reset controller

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Hi Rob,

On 8/27/2019 10:04 PM, Dilip Kota wrote:
Hi Rob,

On 8/26/2019 7:23 PM, Rob Herring wrote:
On Mon, Aug 26, 2019 at 4:52 AM Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx> wrote:
Hi Rob,

On 8/23/2019 8:25 PM, Rob Herring wrote:
On Fri, Aug 23, 2019 at 12:28 AM Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx> wrote:
Add YAML schemas for the reset controller on Intel
Lightening Mountain (LGM) SoC.

Signed-off-by: Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
---
Changes on v2:
      Address review comments
        Update the compatible property definition
        Add description for reset-cells
        Add 'additionalProperties: false' property

   .../bindings/reset/intel,syscon-reset.yaml         | 53 ++++++++++++++++++++++
   1 file changed, 53 insertions(+)
   create mode 100644 Documentation/devicetree/bindings/reset/intel,syscon-reset.yaml

diff --git a/Documentation/devicetree/bindings/reset/intel,syscon-reset.yaml b/Documentation/devicetree/bindings/reset/intel,syscon-reset.yaml
new file mode 100644
index 000000000000..3403a967190a
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/intel,syscon-reset.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/intel,syscon-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Lightening Mountain SoC System Reset Controller
+
+maintainers:
+  - Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
+
+properties:
+  compatible:
+    items:
+      - const: intel,rcu-lgm
+      - const: syscon
+
+  reg:
+    description: Reset controller register base address and size
+
+  intel,global-reset:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: Global reset register offset and bit offset.
+
+  "#reset-cells":
+    const: 2
+    description: |
+      The 1st cell is the register offset.
+      The 2nd cell is the bit offset in the register.
+
+required:
+  - compatible
+  - reg
+  - intel,global-reset
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    rcu0: reset-controller@00000000 {
+        compatible = "intel,rcu-lgm", "syscon";
+        reg = <0x000000 0x80000>;
+        intel,global-reset = <0x10 30>;
+        #reset-cells = <2>;
+    };
+
+    pcie_phy0: pciephy@... {
+        ...
You need to run 'make dt_binding_check' and fix the warnings. The
example has to be buildable and it is not.
Sure, i  will correct this pcie_phy0 node. But i didn't get any warnings
for make dt_binding_check

    CHKDT Documentation/devicetree/bindings/reset/intel,syscon-reset.yaml
DTC Documentation/devicetree/bindings/arm/renesas.example.dt.yaml
FATAL ERROR: Unknown output format "yaml"

Will DTC report about the example node errors? But, DTC is failing with
FATAL_ERROR.
I tried it even after installing libyaml and headers in my local
directory and export the path, but no luck.(ref:
https://lkml.org/lkml/2018/12/3/951)
Could you please let me know if i miss anything and help me to proceed
further.
See Documentation/devicetree/writing-schema.md

I have followed all the steps mentioned in the document before keeping the mail itself. Does the dtc script looks for libyaml and its header files at any default or specific location?
DTC is working for me now.
It is working for me after updating the libyaml and header paths in scripts/dtc/Makefile and yamltree.c (since i have installed libyaml and header files in my local directories)

I have fixed all the warnings and DTC checks are successful. I will push the changes in the next patch version.   DTC Documentation/devicetree/bindings/reset/intel,syscon-reset.example.dt.yaml   CHECK Documentation/devicetree/bindings/reset/intel,syscon-reset.example.dt.yaml

Regards,
Dilip




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