[PATCH 1/4] dt-bindings: input: add Qualcomm QPNP haptics driver

Add bindings for pmi8998 qpnp haptics driver.

Signed-off-by: Caleb Connolly <redacted>
---
 .../bindings/input/qcom,qpnp-haptics.yaml     | 123 ++++++++++++++++++
 include/dt-bindings/input/qcom,qpnp-haptics.h |  31 +++++
 2 files changed, 154 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/qcom,qpnp-haptics.yaml
 create mode 100644 include/dt-bindings/input/qcom,qpnp-haptics.h

diff --git a/Documentation/devicetree/bindings/input/qcom,qpnp-haptics.yaml b/Documentation/devicetree/bindings/input/qcom,qpnp-haptics.yaml
new file mode 100644
index 000000000000..81dd8d6321f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/qcom,qpnp-haptics.yaml

@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2020 Unisoc Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/qcom,qpnp-haptics.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies Inc PMI8998 QPNP haptics
+
+maintainers:
+  - Caleb Connolly <caleb@connolly.tech>
+
+description: |
+  QPNP (Qualcomm Technologies, Inc. Plug N Play) Haptics is a peripheral on some
+  QTI PMICs. It supports linear resonant actuators commonly found in mobile devices.
+
+properties:
+  compatible:
+    enum:
+      - qcom,qpnp-haptics
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 2
+    items:
+      - description: short circuit interrupt
+      - description: play interrupt
+
+  interrupt-names:
+    minItems: 2
+    items:
+      - const: short
+      - const: play
+
+  qcom,actuator-type:
+    description: |
+      The type of actuator attached to the hardware.
+      Allowed values are,
+        0 - HAP_TYPE_LRA
+        1 - HAP_TYPE_ERM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,wave-shape:
+    description: |
+      Selects the wave shape to use.
+      Allowed values are,
+        0 - HAP_WAVE_SINE
+        1 - HAP_WAVE_SQUARE
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,play-mode:
+    description: |
+      Selects the play mode to use.
+      Allowed values are,
+        0 - HAP_PLAY_DIRECT
+        1 - HAP_PLAY_BUFFER
+        2 - HAP_PLAY_AUDIO
+        3 - HAP_PLAY_PWM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+    default: 2
+
+  qcom,wave-play-rate-us:
+    description: |
+      Wave sample durection in microseconds, 1/f where f
+      is the resonant frequency of the actuator.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 20475
+
+  qcom,brake-pattern:
+    minItems: 4
+    description: |
+      The brake pattern are the strengths of the pattern
+      used to brake the haptics. Allowed values are,
+        0 - 0V
+        1 - Vmax/4
+        2 - Vmax/2
+        3 - Vmax
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    default: [0x3, 0x3, 0x2, 0x1]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - qcom,wave-play-rate-us
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/input/qcom,qpnp-haptics.h>
+    pmi8998_lsid1: pmic@3 {
+      compatible = "qcom,pmi8998", "qcom,spmi-pmic";
+      reg = <0x3 SPMI_USID>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      qpnp_haptics: qcom,haptics@c000 {
+        compatible = "qcom,qpnp-haptics";
+        reg = <0xc000 0x100>;
+
+        interrupts = <0x3 0xc0 0x0 IRQ_TYPE_EDGE_BOTH>,
+              <0x3 0xc0 0x1 IRQ_TYPE_EDGE_BOTH>;
+        interrupt-names = "short", "play";
+
+        qcom,actuator-type = <HAP_TYPE_LRA>;
+        qcom,wave-shape = <HAP_WAVE_SINE>;
+        qcom,play-mode = <HAP_PLAY_BUFFER>;
+        qcom,brake-pattern = <0x3 0x3 0x2 0x1>;
+
+        qcom,wave-play-rate-us = <4255>;
+      };
+    };

diff --git a/include/dt-bindings/input/qcom,qpnp-haptics.h b/include/dt-bindings/input/qcom,qpnp-haptics.h
new file mode 100644
index 000000000000..bfbec041484c
--- /dev/null
+++ b/include/dt-bindings/input/qcom,qpnp-haptics.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * This header provides constants for pmi8998 qpnp haptics options.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_PMIC_QPNP_HAPTICS_
+#define _DT_BINDINGS_QCOM_PMIC_QPNP_HAPTICS_
+
+// Actuator types
+#define HAP_TYPE_LRA		0
+#define HAP_TYPE_ERM		1
+
+// LRA Wave type
+#define HAP_WAVE_SINE		0
+#define HAP_WAVE_SQUARE		1
+
+// Play modes
+#define HAP_PLAY_DIRECT		0
+#define HAP_PLAY_BUFFER		1
+#define HAP_PLAY_AUDIO		2
+#define HAP_PLAY_PWM		3
+
+#define HAP_PLAY_MAX		HAP_PLAY_PWM
+
+#define HAP_AUTO_RES_NONE	0
+#define HAP_AUTO_RES_ZXD	1
+#define HAP_AUTO_RES_QWD	2
+#define HAP_AUTO_RES_MAX_QWD	3
+#define HAP_AUTO_RES_ZXD_EOP	4
+
+#endif /* _DT_BINDINGS_QCOM_PMIC_QPNP_HAPTICS_ */
--

2.31.1

On Sat 12 Jun 15:54 CDT 2021, Caleb Connolly wrote:

Please avoid the Plug'n Play naming, just go with Qualcomm SPMI Haptics

+
+properties:
+  compatible:
+    enum:
+      - qcom,qpnp-haptics

qcom,spmi-haptics

But could we also have some pmic-specific compatibles in the binding?
Even though we might not need them in the driver today.

+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 2

I don't think you need minItems, when you list the "items"

+    items:
+      - description: short circuit interrupt
+      - description: play interrupt
+
+  interrupt-names:
+    minItems: 2
+    items:
+      - const: short
+      - const: play
+
+  qcom,actuator-type:
+    description: |
+      The type of actuator attached to the hardware.
+      Allowed values are,
+        0 - HAP_TYPE_LRA
+        1 - HAP_TYPE_ERM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,wave-shape:
+    description: |
+      Selects the wave shape to use.
+      Allowed values are,
+        0 - HAP_WAVE_SINE
+        1 - HAP_WAVE_SQUARE
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,play-mode:
+    description: |
+      Selects the play mode to use.
+      Allowed values are,
+        0 - HAP_PLAY_DIRECT
+        1 - HAP_PLAY_BUFFER
+        2 - HAP_PLAY_AUDIO
+        3 - HAP_PLAY_PWM
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+    default: 2
+
+  qcom,wave-play-rate-us:
+    description: |
+      Wave sample durection in microseconds, 1/f where f
+      is the resonant frequency of the actuator.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 20475
+
+  qcom,brake-pattern:
+    minItems: 4

It's also maxItems: 4, right?

+    description: |
+      The brake pattern are the strengths of the pattern
+      used to brake the haptics. Allowed values are,
+        0 - 0V
+        1 - Vmax/4
+        2 - Vmax/2
+        3 - Vmax
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    default: [0x3, 0x3, 0x2, 0x1]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - qcom,wave-play-rate-us
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/input/qcom,qpnp-haptics.h>

Would be nice with a blank line here.

+    pmi8998_lsid1: pmic@3 {
+      compatible = "qcom,pmi8998", "qcom,spmi-pmic";
+      reg = <0x3 SPMI_USID>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      qpnp_haptics: qcom,haptics@c000 {

No "qcom," in the node name please.

+        compatible = "qcom,qpnp-haptics";
+        reg = <0xc000 0x100>;

With #size-cells = <0> this means that you have 2 regs, but binding says
that you may only have one.

+
+        interrupts = <0x3 0xc0 0x0 IRQ_TYPE_EDGE_BOTH>,
+              <0x3 0xc0 0x1 IRQ_TYPE_EDGE_BOTH>;

I don't think the '<' on those two lines are lining up.

Regards,
Bjorn

On Sat, 12 Jun 2021 20:54:31 +0000, Caleb Connolly wrote:

Add bindings for pmi8998 qpnp haptics driver.

Signed-off-by: Caleb Connolly <redacted>
---
 .../bindings/input/qcom,qpnp-haptics.yaml     | 123 ++++++++++++++++++
 include/dt-bindings/input/qcom,qpnp-haptics.h |  31 +++++
 2 files changed, 154 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/qcom,qpnp-haptics.yaml
 create mode 100644 include/dt-bindings/input/qcom,qpnp-haptics.h

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/input/qcom,qpnp-haptics.example.dt.yaml:0:0: /example-0/pmic@3: failed to match any schema with compatible: ['qcom,pmi8998', 'qcom,spmi-pmic']
Documentation/devicetree/bindings/input/qcom,qpnp-haptics.example.dt.yaml:0:0: /example-0/pmic@3: failed to match any schema with compatible: ['qcom,pmi8998', 'qcom,spmi-pmic']
\ndoc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1491323

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.