linux-kernel - [PATCH v3 1/2] dt-bindings: rtc: max31335: Add max31331 support

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Message-Id: <20250109-add_support_max31331_fix_3-v1-1-a74fac29bf49@analog.com>
Date: Thu, 09 Jan 2025 15:59:57 +0530
From: PavithraUdayakumar-adi via B4 Relay <devnull+pavithra.u.analog.com@...nel.org>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Jean Delvare <jdelvare@...e.com>, 
 Guenter Roeck <linux@...ck-us.net>, 
 Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: linux-rtc@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org, 
 PavithraUdayakumar-adi <pavithra.u@...log.com>
Subject: [PATCH v3 1/2] dt-bindings: rtc: max31335: Add max31331 support

From: PavithraUdayakumar-adi <pavithra.u@...log.com>

MAX31331 is an ultra-low-power, I2C Real-Time Clock RTC with flexible
crystal support. While, MAX31335 offers higher precision, MEMS resonator,
and integrated temperature sensor. MAX31331 uses I2C address as 0x68
where as max31335 uses 0x69.

Changes: Added example for max31331 and modified the register address
for max31335.

Signed-off-by: PavithraUdayakumar-adi <pavithra.u@...log.com>
---
 .../devicetree/bindings/rtc/adi,max31335.yaml      | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/adi,max31335.yaml b/Documentation/devicetree/bindings/rtc/adi,max31335.yaml
index 0125cf6727cc3d9eb3e0253299904ee363ec40ca..f249313bc485d7a6154ce684726d6a950405ef0e 100644
--- a/Documentation/devicetree/bindings/rtc/adi,max31335.yaml
+++ b/Documentation/devicetree/bindings/rtc/adi,max31335.yaml
@@ -18,10 +18,13 @@ allOf:
 
 properties:
   compatible:
-    const: adi,max31335
+    enum:
+      - adi,max31331
+      - adi,max31335
 
   reg:
-    maxItems: 1
+    items:
+      - enum: [0x68, 0x69]
 
   interrupts:
     maxItems: 1
@@ -57,9 +60,9 @@ examples:
         #address-cells = <1>;
         #size-cells = <0>;
 
-        rtc@68 {
+        rtc@69 {
             compatible = "adi,max31335";
-            reg = <0x68>;
+            reg = <0x69>;
             pinctrl-0 = <&rtc_nint_pins>;
             interrupts-extended = <&gpio1 16 IRQ_TYPE_LEVEL_HIGH>;
             aux-voltage-chargeable = <1>;
@@ -67,4 +70,15 @@ examples:
             adi,tc-diode = "schottky";
         };
     };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@68 {
+            reg = <0x68>;
+            compatible = "adi,max31331";
+        };
+    };
 ...

-- 
2.25.1