linux-kernel - [PATCH 2/2] dt-bindings: input: cirrus,cs40l26: Add bindings

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Date:   Thu, 6 Apr 2023 17:20:13 -0500
From:   Fred Treven <fred.treven@...rus.com>
To:     <ben.bright@...rus.com>, <james.ogletree@...rus.com>,
        <dmitry.torokhov@...il.com>, <robh+dt@...nel.org>,
        <krzystztof.kozlowski+dt@...aro.org>,
        <patches@...nsource.cirrus.com>, <linux-input@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Fred Treven <fred.treven@...rus.com>
Subject: [PATCH 2/2] dt-bindings: input: cirrus,cs40l26: Add bindings

Add devicetree bindings for CS40L26 driver.

Signed-off-by: Fred Treven <fred.treven@...rus.com>
---
 .../devicetree/bindings/input/cs40l26.yaml         | 92 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 93 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/cs40l26.yaml

diff --git a/Documentation/devicetree/bindings/input/cs40l26.yaml b/Documentation/devicetree/bindings/input/cs40l26.yaml
new file mode 100644
index 000000000000..1036a374baa0
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/cs40l26.yaml
@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/cs40l26.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic CS40L26 Boosted Haptic Amplifier
+
+maintainers:
+  - Fred Treven <fred.treven@...rus.com>
+
+description:
+  CS40L26 is a Boosted Haptic Driver with Integrated DSP and Waveform Memory
+  with Advanced Closed Loop Algorithms and LRA protection
+
+properties:
+  compatible:
+    enum:
+      - cirrus,cs40l26a
+      - cirrus,cs40l26b
+      - cirrus,cs40l27a
+      - cirrus,cs40l27b
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description:
+      Property describing the interrupt line the devices /ALERT pin is connected to.
+      The device only has one interrupt source.
+
+  VA-supply:
+    description: Regulator for VA analog voltage
+
+  VP-supply:
+    description: Regulator for VP peak voltage
+
+  cirrus,bst-ipk-microamp:
+    description:
+      Maximum amount of current that can be drawn by the device's boost
+      converter in uA. Accepted values are between 1600000 uA and 4800000 uA in
+      50000 uA increments.
+    minimum: 1600000
+    maximum: 4800000
+    default: 4500000
+
+  cirrus,bst-ctl-microvolt:
+    description:
+      Maximum target voltage to which the class H algorithm may increase the
+      VBST supply, expressed in uV. Valid values range from 2550000 to 11000000
+      (inclusive) in steps of 50000. If this value is specified as zero or VP
+      rises above this value, VBST is bypassed to VP. If this value is omitted,
+      the maximum target voltage remains at 11 V.
+    minimum: 2550000
+    maximum: 11000000
+    default: 11000000
+
+  cirrus,bst-exploratory-mode-disable:
+    description:
+      Disable boost exploratory mode if this boolean is present in the
+      devicetree. Boost exploratory mode allows the device to overshoot
+      the set peak current limit. This has potential to damage the boost
+      inductor. Disabling this mode will prevent this from happening; it will
+      also prevent the device from detecting boost inductor short errors.
+      (Default) Enabled
+    type: boolean
+
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      cs40l26: cs40l26@58 {
+        compatible = "cirrus,cs40l26a";
+        reg = <0x58>;
+        interrupt-parent = <&gpio0>;
+        interrupts = <57 8>;
+        reset-gpios = <&gpio0 54 0>;
+        VA-supply = <&dummy_vreg>;
+        VP-supply = <&dummy_vreg>;
+        cirrus,bst-ctl-microvolt = <2600000>; // Max boost voltage = 2.6V
+        cirrus,bst-ipk-microamp = <1650000>; // Max boost current = 1.65A
+        cirrus,bst-exploratory-mode-disabled; // Disable exploratory mode
+      };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 7051386d5a13..3cd9f0c8e38d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4934,6 +4934,7 @@ L:	patches@...nsource.cirrus.com
 S:	Supported
 W:	https://github.com/CirrusLogic/linux-drivers/wiki
 T:	git https://github.com/CirrusLogic/linux-drivers.git
+F:	Documentation/devicetree/bindings/input/cs40l26.yaml
 F:	drivers/input/misc/cs40l*
 F:	include/linux/input/cs40l*
 
-- 
2.7.4