linux-kernel - [PATCH 2/3] dt-bindings: chrome: add new binding google,cros-ec-chrage-state

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Message-Id: <20241118-add_charger_state-v1-2-94997079f35a@chromium.org>
Date: Mon, 18 Nov 2024 17:33:47 +0800
From: "Sung-Chi, Li" <lschyi@...omium.org>
To: Benson Leung <bleung@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>, 
 Guenter Roeck <groeck@...omium.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>
Cc: linux-kernel@...r.kernel.org, chrome-platform@...ts.linux.dev, 
 devicetree@...r.kernel.org
Subject: [PATCH 2/3] dt-bindings: chrome: add new binding
 google,cros-ec-chrage-state

Add new dt bindings for charge chip control. The charge chip control
dt configuration is used by the driver 'cros-ec-charge-state', which is
added in the commit "platform/chrome: cros_ec_charge_state: add new
driver to control charge".

As these charge chip controls are connected under the ChromeOS Embedded
Controller (EC), also add the patternProperties to the
mfd/google,cros-ec bindings.

Signed-off-by: Sung-Chi, Li <lschyi@...omium.org>
---
 .../bindings/chrome/google,cros-charge-state.yaml  | 62 ++++++++++++++++++++++
 .../devicetree/bindings/mfd/google,cros-ec.yaml    |  4 ++
 2 files changed, 66 insertions(+)

diff --git a/Documentation/devicetree/bindings/chrome/google,cros-charge-state.yaml b/Documentation/devicetree/bindings/chrome/google,cros-charge-state.yaml
new file mode 100644
index 000000000000..40e8f6988769
--- /dev/null
+++ b/Documentation/devicetree/bindings/chrome/google,cros-charge-state.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/chrome/google,cros-charge-state.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Chrome OS EC(Embedded Controller) charge state driver.
+
+maintainers:
+  - Sung-Chi, Li <lschyi@...omium.org>
+
+description:
+  Chrome OS devices have an Embedded Controller(EC) which has access to
+  battery charger IC. This node is intended to allow the host to read and
+  control the charger current. The node for this device should be under a
+  cros-ec node like google,cros-ec-spi.
+
+properties:
+  compatible:
+    const: google,cros-ec-charge-state
+
+  min-milliamp:
+    description: min current in milliamp.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  max-milliamp:
+    description: max current in milliamp.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  type:
+    description: current limit type.
+    enum:
+      - charge
+      - input
+
+required:
+  - compatible
+  - min-milliamp
+  - man-milliamp
+  - type
+
+additionalProperties: false
+
+examples:
+  - |+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      cros_ec: ec@0 {
+        compatible = "google,cros-ec-spi";
+        reg = <0>;
+        interrupts = <35 0>;
+
+        charge_chip_battery_current: charge-chip-battery {
+          compatible = "google,cros-ec-charge";
+          type = "charge";
+          min-milliamp = <150>;
+          max-milliamp = <5000>;
+        };
+      };
+    };
diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
index aac8819bd00b..3db4a48d5176 100644
--- a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
+++ b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
@@ -166,6 +166,10 @@ patternProperties:
     type: object
     $ref: /schemas/extcon/extcon-usbc-cros-ec.yaml#
 
+  "^charge-chip-*":
+    type: object
+    $ref: /schemas/chrome/google,cros-charge-state.yaml#
+
 required:
   - compatible
 

-- 
2.47.0.338.g60cca15819-goog