iio: proximity: isl29501: Fix return type of isl29501_register_writegrafted

isl29501_register_write() was returning a u32 instead of an int.
Since the function returns negative error codes (such as -ERANGE or
return values from i2c_smbus_write_byte_data()), returning an unsigned
integer type prevents callers from correctly checking for negative error
conditions.

Fix this by changing the function return type from u32 to int.

This was found through manual code review.

Fixes: 1c28799257bc ("iio: light: isl29501: Add support for the ISL29501 ToF sensor.")
Signed-off-by: Salah Triki <salah.triki@gmail.com>
Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

4 files changed, 226 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/counter/fsl,ftm-quaddec.yaml b/Documentation/devicetree/bindings/counter/fsl,ftm-quaddec.yaml
new file mode 100644
index 000000000..384ca63b6
--- /dev/null
+++ b/Documentation/devicetree/bindings/counter/fsl,ftm-quaddec.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/counter/fsl,ftm-quaddec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: FlexTimer Quadrature decoder counter
+
+description:
+  Exposes a simple counter for the quadrature decoder mode.
+
+maintainers:
+  - Frank Li <Frank.li@nxp.com>
+
+properties:
+  compatible:
+    const: fsl,ftm-quaddec
+
+  reg:
+    maxItems: 1
+
+  big-endian: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    counter@29d0000 {
+       compatible = "fsl,ftm-quaddec";
+       reg = <0x29d0000 0x10000>;
+       big-endian;
+    };
diff --git a/Documentation/devicetree/bindings/counter/interrupt-counter.yaml b/Documentation/devicetree/bindings/counter/interrupt-counter.yaml
new file mode 100644
index 000000000..fd075d104
--- /dev/null
+++ b/Documentation/devicetree/bindings/counter/interrupt-counter.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/counter/interrupt-counter.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Interrupt counter
+
+maintainers:
+  - Oleksij Rempel <o.rempel@pengutronix.de>
+
+description: |
+  A generic interrupt counter to measure interrupt frequency. It was developed
+  and used for agricultural devices to measure rotation speed of wheels or
+  other tools. Since the direction of rotation is not important, only one
+  signal line is needed.
+  Interrupts or gpios are required. If both are defined, the interrupt will
+  take precedence for counting interrupts.
+
+properties:
+  compatible:
+    const: interrupt-counter
+
+  interrupts:
+    maxItems: 1
+
+  gpios:
+    maxItems: 1
+
+required:
+  - compatible
+
+anyOf:
+  - required: [ interrupts-extended ]
+  - required: [ interrupts ]
+  - required: [ gpios ]
+
+additionalProperties: false
+
+examples:
+  - |
+
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    counter-0 {
+        compatible = "interrupt-counter";
+        interrupts-extended = <&gpio 0 IRQ_TYPE_EDGE_RISING>;
+    };
+
+    counter-1 {
+        compatible = "interrupt-counter";
+        gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+    };
+
+    counter-2 {
+        compatible = "interrupt-counter";
+        interrupts-extended = <&gpio 2 IRQ_TYPE_EDGE_RISING>;
+        gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/counter/ti,am62-ecap-capture.yaml b/Documentation/devicetree/bindings/counter/ti,am62-ecap-capture.yaml
new file mode 100644
index 000000000..4e0b2d2b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/counter/ti,am62-ecap-capture.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/counter/ti,am62-ecap-capture.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments Enhanced Capture (eCAP) Module
+
+maintainers:
+  - Julien Panis <jpanis@baylibre.com>
+
+description: |
+  The eCAP module resources can be used to capture timestamps
+  on input signal events (falling/rising edges).
+
+properties:
+  compatible:
+    const: ti,am62-ecap-capture
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: fck
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        capture@23100000 { /* eCAP in capture mode on am62x */
+            compatible = "ti,am62-ecap-capture";
+            reg = <0x00 0x23100000 0x00 0x100>;
+            interrupts = <GIC_SPI 113 IRQ_TYPE_EDGE_RISING>;
+            power-domains = <&k3_pds 51 TI_SCI_PD_EXCLUSIVE>;
+            clocks = <&k3_clks 51 0>;
+            clock-names = "fck";
+        };
+    };
diff --git a/Documentation/devicetree/bindings/counter/ti-eqep.yaml b/Documentation/devicetree/bindings/counter/ti-eqep.yaml
new file mode 100644
index 000000000..c882ab5fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/counter/ti-eqep.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/counter/ti-eqep.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP) Module
+
+maintainers:
+  - David Lechner <david@lechnology.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,am3352-eqep
+      - ti,am62-eqep
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: The eQEP event interrupt
+    maxItems: 1
+
+  clocks:
+    description: The functional and interface clock that determines the clock
+      rate for the eQEP peripheral.
+    maxItems: 1
+
+  clock-names:
+    const: sysclkout
+
+  power-domains:
+    maxItems: 1
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,am62-eqep
+    then:
+      properties:
+        clock-names: false
+
+      required:
+        - power-domains
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    eqep0: counter@180 {
+        compatible = "ti,am3352-eqep";
+        reg = <0x180 0x80>;
+        clocks = <&l4ls_gclk>;
+        interrupts = <79>;
+    };
+
+...