linux-kernel - [PATCH v2 3/6] dt-bindings: mfd: add max77759 binding

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Message-Id: <20250226-max77759-mfd-v2-3-a65ebe2bc0a9@linaro.org>
Date: Wed, 26 Feb 2025 17:51:22 +0000
From: André Draszik <andre.draszik@...aro.org>
To: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-gpio@...r.kernel.org, linux-hardening@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH v2 3/6] dt-bindings: mfd: add max77759 binding

The Maxim MAX77759 is a companion PMIC for USB Type-C applications and
includes Battery Charger, Fuel Gauge, temperature sensors, USB Type-C
Port Controller (TCPC), NVMEM, and a GPIO expander.

This describes the top-level device.

Signed-off-by: André Draszik <andre.draszik@...aro.org>

---
v2:
* rename expected nvmem subdev nodename to 'nvmem-0'
  I'd have preferred just 'nvmem', but that matches nvmem-consumer.yaml
  and fails validation.

Note: MAINTAINERS doesn't need updating, the binding update for the
first leaf device (gpio) adds a wildcard matching all max77759 bindings
---
 .../devicetree/bindings/mfd/maxim,max77759.yaml    | 104 +++++++++++++++++++++
 1 file changed, 104 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/maxim,max77759.yaml b/Documentation/devicetree/bindings/mfd/maxim,max77759.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..87e3737896a289998a18b67932dbccacfb8e3150
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/maxim,max77759.yaml
@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/maxim,max77759.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX77759 PMIC for USB Type-C applications
+
+maintainers:
+  - André Draszik <andre.draszik@...aro.org>
+
+description: |
+  This is a part of device tree bindings for the MAX77759 companion Power
+  Management IC for USB Type-C applications.
+
+  The MAX77759 includes Battery Charger, Fuel Gauge, temperature sensors, USB
+  Type-C Port Controller (TCPC), NVMEM, and a GPIO expander.
+
+properties:
+  compatible:
+    const: maxim,max77759
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+  gpio:
+    $ref: /schemas/gpio/maxim,max77759-gpio.yaml
+
+  reg:
+    maxItems: 1
+
+  nvmem-0:
+    $ref: /schemas/nvmem/maxim,max77759-nvmem.yaml
+
+required:
+  - compatible
+  - interrupts
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@66 {
+            compatible = "maxim,max77759";
+            reg = <0x66>;
+            interrupts-extended = <&gpa8 3 IRQ_TYPE_LEVEL_LOW>;
+
+            interrupt-controller;
+            #interrupt-cells = <2>;
+
+            gpio {
+                compatible = "maxim,max77759-gpio";
+
+                gpio-controller;
+                #gpio-cells = <2>;
+
+                interrupt-controller;
+                #interrupt-cells = <2>;
+            };
+
+            nvmem-0 {
+                compatible = "maxim,max77759-nvmem";
+
+                nvmem-layout {
+                    compatible = "fixed-layout";
+                    #address-cells = <1>;
+                    #size-cells = <1>;
+
+                    reboot-mode@0 {
+                        reg = <0x0 0x4>;
+                    };
+
+                    boot-reason@4 {
+                        reg = <0x4 0x4>;
+                    };
+
+                    shutdown-user-flag@8 {
+                        reg = <0x8 0x1>;
+                    };
+
+                    rsoc@10 {
+                        reg = <0xa 0x2>;
+                    };
+                };
+            };
+        };
+    };

-- 
2.48.1.658.g4767266eb4-goog