linux-kernel - [PATCH V2 4/6] dt-bindings: timestamp: Add Tegra234 support

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Message-ID: <20230214115553.10416-5-dipenp@nvidia.com>
Date:   Tue, 14 Feb 2023 03:55:51 -0800
From:   Dipen Patel <dipenp@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <linus.walleij@...aro.org>,
        <devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <robh+dt@...nel.org>, <timestamp@...ts.linux.dev>
CC:     Dipen Patel <dipenp@...dia.com>
Subject: [PATCH V2 4/6] dt-bindings: timestamp: Add Tegra234 support

Added timestamp provider support for the Tegra234 in devicetree
bindings.

Signed-off-by: Dipen Patel <dipenp@...dia.com>
---
v2:
- Removed nvidia,slices property
- Added nvidia,gpio-controller based on review comments from Thierry,
  this will help simplify the  hte provider driver.

 .../timestamp/nvidia,tegra194-hte.yaml        | 30 ++++++++++++-------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml b/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml
index c31e207d1652..d0f4ed75baee 100644
--- a/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml
+++ b/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/timestamp/nvidia,tegra194-hte.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Tegra194 on chip generic hardware timestamping engine (HTE)
+title: Tegra on chip generic hardware timestamping engine (HTE) provider
 
 maintainers:
   - Dipen Patel <dipenp@...dia.com>
@@ -23,6 +23,8 @@ properties:
     enum:
       - nvidia,tegra194-gte-aon
       - nvidia,tegra194-gte-lic
+      - nvidia,tegra234-gte-aon
+      - nvidia,tegra234-gte-lic
 
   reg:
     maxItems: 1
@@ -38,14 +40,11 @@ properties:
     minimum: 1
     maximum: 256
 
-  nvidia,slices:
-    $ref: /schemas/types.yaml#/definitions/uint32
+  nvidia,gpio-controller:
+    $ref: /schemas/types.yaml#/definitions/phandle
     description:
-      HTE lines are arranged in 32 bit slice where each bit represents different
-      line/signal that it can enable/configure for the timestamp. It is u32
-      property and depends on the HTE instance in the chip. The value 3 is for
-      GPIO GTE and 11 for IRQ GTE.
-    enum: [3, 11]
+      The phandle to AON gpio controller instance. This is required to handle
+      namespace conversion between GPIO and GTE.
 
   '#timestamp-cells':
     description:
@@ -55,11 +54,21 @@ properties:
       mentioned in the nvidia GPIO device tree binding document.
     const: 1
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - nvidia,tegra194-gte-aon
+          - nvidia,tegra234-gte-aon
+then:
+  required:
+    - nvidia,gpio-controller
+
 required:
   - compatible
   - reg
   - interrupts
-  - nvidia,slices
   - "#timestamp-cells"
 
 additionalProperties: false
@@ -71,7 +80,7 @@ examples:
               reg = <0xc1e0000 0x10000>;
               interrupts = <0 13 0x4>;
               nvidia,int-threshold = <1>;
-              nvidia,slices = <3>;
+              nvidia,gpio-controller = <&gpio_aon>;
               #timestamp-cells = <1>;
     };
 
@@ -81,7 +90,6 @@ examples:
               reg = <0x3aa0000 0x10000>;
               interrupts = <0 11 0x4>;
               nvidia,int-threshold = <1>;
-              nvidia,slices = <11>;
               #timestamp-cells = <1>;
     };
 
-- 
2.17.1