linux-kernel - [RFC PATCH V2 04/12] dt-bindings: misc: tegra-i2c: config settings

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Date: Mon, 1 Jul 2024 20:42:22 +0530
From: Krishna Yarlagadda <kyarlagadda@...dia.com>
To: <linux-tegra@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-i2c@...r.kernel.org>,
	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <thierry.reding@...il.com>, <jonathanh@...dia.com>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <corbet@....net>,
	<andi.shyti@...nel.org>, <wsa+renesas@...g-engineering.com>,
	<ulf.hansson@...aro.org>, <adrian.hunter@...el.com>, <digetx@...il.com>,
	<ldewangan@...dia.com>, <kyarlagadda@...dia.com>, <mkumard@...dia.com>
Subject: [RFC PATCH V2 04/12] dt-bindings: misc: tegra-i2c: config settings

I2C interface timing registers are configured using config setting
framework. List available field properties for Tegra I2C controllers.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@...dia.com>
---
 .../misc/nvidia,tegra-config-settings.yaml    | 83 +++++++++++++++++--
 1 file changed, 74 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml b/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
index 4e5d52504c01..5f4da633e69b 100644
--- a/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
+++ b/Documentation/devicetree/bindings/misc/nvidia,tegra-config-settings.yaml
@@ -38,17 +38,74 @@ patternProperties:
     additionalProperties: false
 
     patternProperties:
-      "^[a-z0-9_]+-cfg$":
-        description:
-          Config profiles applied conditionally.
+      "^i2c-[a-z0-9_]+-cfg$":
+        description: Config settings for I2C devices.
         type: object
-        patternProperties:
-	  "nvidia,[a-z0-9_]+$":
-	    description:
-	      Register field configuration.
-	    $ref: /schemas/types.yaml#/definitions/uint32
+        additionalProperties: false
 
-additionalProperties: true
+        properties:
+          nvidia,i2c-clk-divisor-hs-mode:
+            description: I2C clock divisor for HS mode.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-clk-divisor-fs-mode:
+            description: I2C clock divisor for FS mode.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-hs-sclk-high-period:
+            description: I2C high speed sclk high period.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-hs-sclk-low-period:
+            description: I2C high speed sclk low period.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-hs-stop-setup-time:
+            description: I2C high speed stop setup time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-hs-start-hold-time:
+            description: I2C high speed start hold time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-hs-start-setup-time:
+            description: I2C high speed start setup time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-sclk-high-period:
+            description: I2C sclk high period.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-sclk-low-period:
+            description: I2C sclk low period.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-bus-free-time:
+            description: I2C bus free time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-stop-setup-time:
+            description: I2C stop setup time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+          nvidia,i2c-start-hold-time:
+            description: I2C start hold time.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 0xffff
+
+additionalProperties: false
 
 examples:
   - |
@@ -58,5 +115,13 @@ examples:
                 nvidia,i2c-hs-sclk-high-period = <0x03>;
                 nvidia,i2c-hs-sclk-low-period = <0x08>;
             };
+            i2c-fast-cfg {
+                nvidia,i2c-clk-divisor-fs-mode = <0x3c>;
+                nvidia,i2c-sclk-high-period = <0x02>;
+            };
+            i2c-fastplus-cfg {
+                nvidia,i2c-clk-divisor-fs-mode = <0x4f>;
+                nvidia,i2c-sclk-high-period = <0x07>;
+            };
         };
     };
-- 
2.43.2