linux-kernel - [PATCH v2 2/2] dt-bindings: rtc: add pcf85053a

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Message-Id: <20231103125106.78220-2-menin@carlosaurelio.net>
Date:   Fri,  3 Nov 2023 09:51:06 -0300
From:   Carlos Menin <menin@...losaurelio.net>
To:     linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Carlos Menin <menin@...losaurelio.net>,
        Sergio Prado <sergio.prado@...abworks.com>
Subject: [PATCH v2 2/2] dt-bindings: rtc: add pcf85053a

Add YAML bindings for NXP's PCF85053A RTC chip.

Signed-off-by: Carlos Menin <menin@...losaurelio.net>
Reviewed-by: Sergio Prado <sergio.prado@...abworks.com>
---
 .../bindings/rtc/nxp,pcf85053a.yaml           | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/nxp,pcf85053a.yaml

diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf85053a.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf85053a.yaml
new file mode 100644
index 000000000000..a1fc29dd30f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/nxp,pcf85053a.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/nxp,pcf85053a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCF85053A Real Time Clock
+
+maintainers:
+  - Carlos Menin <menin@...losaurelio.net>
+
+properties:
+  compatible:
+    enum:
+      - nxp,pcf85053a
+
+  reg:
+    maxItems: 1
+
+  quartz-load-femtofarads:
+    description:
+      The capacitive load of the crystal, expressed in femto Farad (fF).
+    enum: [6000, 7000, 12500]
+    default: 12500
+
+  nxp,quartz-drive-control:
+    description:
+      The oscillator is designed to be used with quartz with a series resistance
+      up to 100 kOhms. This covers the typical range of 32.768 kHz quartz
+      crystals. A low drive mode is available for low series resistance quartz
+      (up to 60 kOhms). This reduces the current consumption. For very high
+      series resistance quartz (up to 500 kOhms), there is a high drive mode.
+      Current consumption increases substantially in this mode.
+    enum: [low, normal, high]
+    default: normal
+
+  nxp,low-jitter-mode:
+    description:
+      If set to true, will decrease the CLK output jitter, at the cost of
+      increasing the current consumption.
+    type: boolean
+    default: false
+
+  nxp,clk-inverted:
+    description:
+      Invert clock output. Normally, the low jitter mode reduces jitter on the
+      rising edge of the output clock. If this property is set to true, then the
+      low jitter mode will affect the falling edge of the output clock.
+    type: boolean
+    default: false
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: rtc.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@6f {
+            compatible = "nxp,pcf85053a";
+            reg = <0x6f>;
+        };
+    };
-- 
2.34.1