[PATCH 1/6] dt-bindings: gpio: Convert bindings for NXP PCA953x family to dtschema

[PATCH 1/6] dt-bindings: gpio: Convert bindings for NXP PCA953x family to dtschema

[Krzysztof Kozlowski]

Convert the NXP PCA953x family of GPIO expanders bindings to device tree
schema.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../devicetree/bindings/gpio/gpio-pca953x.txt |  90 ------------
 .../bindings/gpio/gpio-pca95xx.yaml           | 138 ++++++++++++++++++
 .../devicetree/bindings/trivial-devices.yaml  |   4 -
 3 files changed, 138 insertions(+), 94 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml

diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
deleted file mode 100644
index 3126c3817e2a..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
+++ /dev/null
@@ -1,90 +0,0 @@
-* NXP PCA953x I2C GPIO multiplexer
-
-Required properties:
- - compatible: Has to contain one of the following:
-	nxp,pca6416
-	nxp,pca9505
-	nxp,pca9534
-	nxp,pca9535
-	nxp,pca9536
-	nxp,pca9537
-	nxp,pca9538
-	nxp,pca9539
-	nxp,pca9554
-	nxp,pca9555
-	nxp,pca9556
-	nxp,pca9557
-	nxp,pca9574
-	nxp,pca9575
-	nxp,pca9698
-	nxp,pcal6416
-	nxp,pcal6524
-	nxp,pcal9535
-	nxp,pcal9555a
-	maxim,max7310
-	maxim,max7312
-	maxim,max7313
-	maxim,max7315
-	ti,pca6107
-	ti,pca9536
-	ti,tca6408
-	ti,tca6416
-	ti,tca6424
-	ti,tca9539
-	ti,tca9554
-	onnn,cat9554
-	onnn,pca9654
-	exar,xra1202
- - gpio-controller: if used as gpio expander.
- - #gpio-cells: if used as gpio expander.
- - interrupt-controller: if to be used as interrupt expander.
- - #interrupt-cells: if to be used as interrupt expander.
-
-Optional properties:
- - interrupts: interrupt specifier for the device's interrupt output.
- - reset-gpios: GPIO specification for the RESET input. This is an
-		active low signal to the PCA953x.
- - vcc-supply:	power supply regulator.
-
-Example:
-
-
-	gpio at 20 {
-		compatible = "nxp,pca9505";
-		reg = <0x20>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_pca9505>;
-		gpio-controller;
-		#gpio-cells = <2>;
-		interrupt-parent = <&gpio3>;
-		interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
-	};
-
-
-Example with Interrupts:
-
-
-	gpio99: gpio at 22 {
-		compatible = "nxp,pcal6524";
-		reg = <0x22>;
-		interrupt-parent = <&gpio6>;
-		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;	/* gpio6_161 */
-		interrupt-controller;
-		#interrupt-cells = <2>;
-		vcc-supply = <&vdds_1v8_main>;
-		gpio-controller;
-		#gpio-cells = <2>;
-		gpio-line-names =
-			"hdmi-ct-hpd", "hdmi.ls-oe", "p02", "p03", "vibra", "fault2", "p06", "p07",
-			"en-usb", "en-host1", "en-host2", "chg-int", "p14", "p15", "mic-int", "en-modem",
-			"shdn-hs-amp", "chg-status+red", "green", "blue", "en-esata", "fault1", "p26", "p27";
-	};
-
-	ts3a227 at 3b {
-		compatible = "ti,ts3a227e";
-		reg = <0x3b>;
-		interrupt-parent = <&gpio99>;
-		interrupts = <14 IRQ_TYPE_EDGE_RISING>;
-		ti,micbias = <0>;	/* 2.1V */
-	};
-
diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
new file mode 100644
index 000000000000..c5bb24b3b7b5
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
@@ -0,0 +1,138 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-pca95xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCA95xx I2C GPIO multiplexer
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+properties:
+  compatible:
+    enum:
+      - exar,xra1202
+      - maxim,max7310
+      - maxim,max7312
+      - maxim,max7313
+      - maxim,max7315
+      - nxp,pca6416
+      - nxp,pca9505
+      - nxp,pca9534
+      - nxp,pca9535
+      - nxp,pca9536
+      - nxp,pca9537
+      - nxp,pca9538
+      - nxp,pca9539
+      - nxp,pca9554
+      - nxp,pca9555
+      - nxp,pca9556
+      - nxp,pca9557
+      - nxp,pca9574
+      - nxp,pca9575
+      - nxp,pca9698
+      - nxp,pcal6416
+      - nxp,pcal6524
+      - nxp,pcal9535
+      - nxp,pcal9555a
+      - onnn,cat9554
+      - onnn,pca9654
+      - ti,pca6107
+      - ti,pca9536
+      - ti,tca6408
+      - ti,tca6416
+      - ti,tca6424
+      - ti,tca9539
+      - ti,tca9554
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+  gpio-line-names:
+    minItems: 1
+    maxItems: 32
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  reset-gpios:
+    description:
+      GPIO specification for the RESET input. This is an active low signal to
+      the PCA953x.
+
+  vcc-supply:
+    description:
+      Optional power supply
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio at 20 {
+            compatible = "nxp,pca9505";
+            reg = <0x20>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&pinctrl_pca9505>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-parent = <&gpio3>;
+            interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
+        };
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c1 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio99: gpio at 22 {
+            compatible = "nxp,pcal6524";
+            reg = <0x22>;
+            interrupt-parent = <&gpio6>;
+            interrupts = <1 IRQ_TYPE_EDGE_FALLING>;	/* gpio6_161 */
+            interrupt-controller;
+            #interrupt-cells = <2>;
+            vcc-supply = <&vdds_1v8_main>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            gpio-line-names = "hdmi-ct-hpd", "hdmi.ls-oe", "p02", "p03",
+                              "vibra", "fault2", "p06", "p07", "en-usb",
+                              "en-host1", "en-host2", "chg-int", "p14", "p15",
+                              "mic-int", "en-modem", "shdn-hs-amp",
+                              "chg-status+red", "green", "blue", "en-esata",
+                              "fault1", "p26", "p27";
+        };
+
+        ts3a227 at 3b {
+            compatible = "ti,ts3a227e";
+            reg = <0x3b>;
+            interrupt-parent = <&gpio99>;
+            interrupts = <14 IRQ_TYPE_EDGE_RISING>;
+            ti,micbias = <0>;	/* 2.1V */
+        };
+    };
diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index 4ace8039840a..d0d00f2ae7f6 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -306,10 +306,6 @@ properties:
           - nuvoton,npct601
             # Nuvoton Temperature Sensor
           - nuvoton,w83773g
-            # Octal SMBus and I2C registered interface
-          - nxp,pca9556
-            # 8-bit I2C-bus and SMBus I/O port with reset
-          - nxp,pca9557
             # OKI ML86V7667 video decoder
           - oki,ml86v7667
             # OV5642: Color CMOS QSXGA (5-megapixel) Image Sensor with OmniBSI and Embedded TrueFocus
-- 
2.17.1

[PATCH 2/6] dt-bindings: gpio: Convert bindings for Maxim MAX732x family to dtschema

[Krzysztof Kozlowski]

Convert the Maxim MAX732x family of GPIO expanders bindings to device
tree schema by merging it with existing PCA95xx schema.  These are quite
similar so merging reduces duplication.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../devicetree/bindings/gpio/gpio-max732x.txt | 58 ---------------
 .../bindings/gpio/gpio-pca95xx.yaml           | 72 ++++++++++++++++++-
 2 files changed, 70 insertions(+), 60 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-max732x.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-max732x.txt b/Documentation/devicetree/bindings/gpio/gpio-max732x.txt
deleted file mode 100644
index b3a9c0c32823..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-max732x.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-* MAX732x-compatible I/O expanders
-
-Required properties:
-  - compatible: Should be one of the following:
-    - "maxim,max7319": For the Maxim MAX7319
-    - "maxim,max7320": For the Maxim MAX7320
-    - "maxim,max7321": For the Maxim MAX7321
-    - "maxim,max7322": For the Maxim MAX7322
-    - "maxim,max7323": For the Maxim MAX7323
-    - "maxim,max7324": For the Maxim MAX7324
-    - "maxim,max7325": For the Maxim MAX7325
-    - "maxim,max7326": For the Maxim MAX7326
-    - "maxim,max7327": For the Maxim MAX7327
-  - reg: I2C slave address for this device.
-  - gpio-controller: Marks the device node as a GPIO controller.
-  - #gpio-cells: Should be 2.
-    - first cell is the GPIO number
-    - second cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
-      Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
-
-Optional properties:
-
-  The I/O expander can detect input state changes, and thus optionally act as
-  an interrupt controller. When the expander interrupt line is connected all the
-  following properties must be set. For more information please see the
-  interrupt controller device tree bindings documentation available at
-  Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
-
-  - interrupt-controller: Identifies the node as an interrupt controller.
-  - #interrupt-cells: Number of cells to encode an interrupt source, shall be 2.
-    - first cell is the pin number
-    - second cell is used to specify flags
-  - interrupts: Interrupt specifier for the controllers interrupt.
-
-Please refer to gpio.txt in this directory for details of the common GPIO
-bindings used by client devices.
-
-Example 1. MAX7325 with interrupt support enabled (CONFIG_GPIO_MAX732X_IRQ=y):
-
-	expander: max7325 at 6d {
-		compatible = "maxim,max7325";
-		reg = <0x6d>;
-		gpio-controller;
-		#gpio-cells = <2>;
-		interrupt-controller;
-		#interrupt-cells = <2>;
-		interrupt-parent = <&gpio4>;
-		interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
-	};
-
-Example 2. MAX7325 with interrupt support disabled (CONFIG_GPIO_MAX732X_IRQ=n):
-
-	expander: max7325 at 6d {
-		compatible = "maxim,max7325";
-		reg = <0x6d>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
index c5bb24b3b7b5..e90433b7d52b 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
+++ b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
@@ -9,6 +9,10 @@ title: NXP PCA95xx I2C GPIO multiplexer
 maintainers:
   - Krzysztof Kozlowski <krzk@kernel.org>
 
+description: |+
+  Bindings for the family of I2C GPIO multiplexers/expanders: NXP PCA95xx,
+  Maxim MAX73xx
+
 properties:
   compatible:
     enum:
@@ -17,6 +21,15 @@ properties:
       - maxim,max7312
       - maxim,max7313
       - maxim,max7315
+      - maxim,max7319
+      - maxim,max7320
+      - maxim,max7321
+      - maxim,max7322
+      - maxim,max7323
+      - maxim,max7324
+      - maxim,max7325
+      - maxim,max7326
+      - maxim,max7327
       - nxp,pca6416
       - nxp,pca9505
       - nxp,pca9534
@@ -69,11 +82,11 @@ properties:
   reset-gpios:
     description:
       GPIO specification for the RESET input. This is an active low signal to
-      the PCA953x.
+      the PCA953x.  Not valid for Maxim MAX732x devices.
 
   vcc-supply:
     description:
-      Optional power supply
+      Optional power supply.  Not valid for Maxim MAX732x devices.
 
 required:
   - compatible
@@ -83,6 +96,27 @@ required:
 
 unevaluatedProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - maxim,max7320
+              - maxim,max7321
+              - maxim,max7322
+              - maxim,max7323
+              - maxim,max7324
+              - maxim,max7325
+              - maxim,max7326
+              - maxim,max7327
+    then:
+      properties:
+        reset-gpios:
+          maxItems: 0
+        vcc-supply:
+          maxItems: 0
+
 examples:
   - |
     #include <dt-bindings/interrupt-controller/irq.h>
@@ -136,3 +170,37 @@ examples:
             ti,micbias = <0>;	/* 2.1V */
         };
     };
+
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c2 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        // MAX7325 with interrupt support enabled
+        gpio at 6d {
+            compatible = "maxim,max7325";
+            reg = <0x6d>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+            interrupt-parent = <&gpio4>;
+            interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
+
+  - |
+    i2c3 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        // MAX7325 with interrupt support disabled
+        gpio at 6e {
+            compatible = "maxim,max7325";
+            reg = <0x6e>;
+            gpio-controller;
+            #gpio-cells = <2>;
+        };
+    };
-- 
2.17.1

[PATCH 3/6] ARM: dts: am335x: lxm: Fix PCA9539 GPIO expander properties

[Krzysztof Kozlowski]

The PCA9539 GPIO expander requires GPIO controller properties to operate
properly.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/boot/dts/am335x-lxm.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/am335x-lxm.dts b/arch/arm/boot/dts/am335x-lxm.dts
index cd55f11260ea..0f078465297a 100644
--- a/arch/arm/boot/dts/am335x-lxm.dts
+++ b/arch/arm/boot/dts/am335x-lxm.dts
@@ -160,11 +160,15 @@
 	serial_config1: serial_config1 at 20 {
 		compatible = "nxp,pca9539";
 		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
 	};
 
 	serial_config2: serial_config2 at 21 {
 		compatible = "nxp,pca9539";
 		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
 	};
 
 	tps: tps at 2d {
-- 
2.17.1

[PATCH 4/6] ARM: dts: aspeed: Fix PCA95xx GPIO expander properties on Portwell

[Krzysztof Kozlowski]

The PCA95xx GPIO expander requires GPIO controller properties to operate
properly.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts b/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
index 4a1ca8f5b6a7..03c161493ffc 100644
--- a/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
@@ -121,6 +121,8 @@
 	pca9555 at 27 {
 		compatible = "nxp,pca9555";
 		reg = <0x27>;
+		gpio-controller;
+		#gpio-cells = <2>;
 	};
 };
 
-- 
2.17.1

[PATCH 5/6] ARM: dts: dove: Fix PCA95xx GPIO expander properties on A510

[Krzysztof Kozlowski]

The PCA95xx GPIO expander requires GPIO controller properties to operate
properly.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/boot/dts/dove-sbc-a510.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/dove-sbc-a510.dts b/arch/arm/boot/dts/dove-sbc-a510.dts
index 2bb85a9b7614..df021f9b0117 100644
--- a/arch/arm/boot/dts/dove-sbc-a510.dts
+++ b/arch/arm/boot/dts/dove-sbc-a510.dts
@@ -143,6 +143,7 @@
 	gpio_ext: gpio at 20 {
 		compatible = "nxp,pca9555";
 		reg = <0x20>;
+		gpio-controller;
 		#gpio-cells = <2>;
 	};
 };
-- 
2.17.1

[PATCH 6/6] ARM: dts: vf: Fix PCA95xx GPIO expander properties on ZII CFU1

[Krzysztof Kozlowski]

The PCA95xx GPIO expander requires GPIO controller properties to operate
properly.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/boot/dts/vf610-zii-cfu1.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/vf610-zii-cfu1.dts b/arch/arm/boot/dts/vf610-zii-cfu1.dts
index 64e0e9509226..e76a7ebd5dc9 100644
--- a/arch/arm/boot/dts/vf610-zii-cfu1.dts
+++ b/arch/arm/boot/dts/vf610-zii-cfu1.dts
@@ -226,6 +226,7 @@
 		compatible = "nxp,pca9554";
 		reg = <0x22>;
 		gpio-controller;
+		#gpio-cells = <2>;
 	};
 
 	lm75 at 48 {
-- 
2.17.1

[PATCH 3/6] ARM: dts: am335x: lxm: Fix PCA9539 GPIO expander properties

[Tony Lindgren]

* Krzysztof Kozlowski <krzk@kernel.org> [200829 09:40]:
> The PCA9539 GPIO expander requires GPIO controller properties to operate
> properly.

Best to merge this with the rest of the series:

Acked-by: Tony Lindgren <tony@atomide.com>

[PATCH 6/6] ARM: dts: vf: Fix PCA95xx GPIO expander properties on ZII CFU1

[Shawn Guo]

On Sat, Aug 29, 2020 at 11:40:24AM +0200, Krzysztof Kozlowski wrote:
> The PCA95xx GPIO expander requires GPIO controller properties to operate
> properly.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Applied, thanks.

[PATCH 4/6] ARM: dts: aspeed: Fix PCA95xx GPIO expander properties on Portwell

[Krzysztof Kozlowski]

On Sat, Aug 29, 2020 at 11:40:22AM +0200, Krzysztof Kozlowski wrote:
> The PCA95xx GPIO expander requires GPIO controller properties to operate
> properly.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts | 2 ++
>  1 file changed, 2 insertions(+)

Hi everyone,

Any comments here?

Best regards,
Krzysztof


> 
> diff --git a/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts b/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
> index 4a1ca8f5b6a7..03c161493ffc 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-portwell-neptune.dts
> @@ -121,6 +121,8 @@
>  	pca9555 at 27 {
>  		compatible = "nxp,pca9555";
>  		reg = <0x27>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
>  	};
>  };
>  
> -- 
> 2.17.1
> 

[PATCH 1/6] dt-bindings: gpio: Convert bindings for NXP PCA953x family to dtschema

[Krzysztof Kozlowski]

On Sat, Aug 29, 2020 at 11:40:19AM +0200, Krzysztof Kozlowski wrote:
> Convert the NXP PCA953x family of GPIO expanders bindings to device tree
> schema.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  .../devicetree/bindings/gpio/gpio-pca953x.txt |  90 ------------
>  .../bindings/gpio/gpio-pca95xx.yaml           | 138 ++++++++++++++++++
>  .../devicetree/bindings/trivial-devices.yaml  |   4 -
>  3 files changed, 138 insertions(+), 94 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
>  create mode 100644 Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
>

I will resend the dt-bindings replacing unevaluated ->
additionalProperties.

Best regards,
Krzysztof

[PATCH 5/6] ARM: dts: dove: Fix PCA95xx GPIO expander properties on A510

[Linus Walleij]

On Sat, Aug 29, 2020 at 11:40 AM Krzysztof Kozlowski <krzk@kernel.org> wrote:

> The PCA95xx GPIO expander requires GPIO controller properties to operate
> properly.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

[PATCH 2/6] dt-bindings: gpio: Convert bindings for Maxim MAX732x family to dtschema

[Rob Herring]

On Sat, Aug 29, 2020 at 11:40:20AM +0200, Krzysztof Kozlowski wrote:
> Convert the Maxim MAX732x family of GPIO expanders bindings to device
> tree schema by merging it with existing PCA95xx schema.  These are quite
> similar so merging reduces duplication.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  .../devicetree/bindings/gpio/gpio-max732x.txt | 58 ---------------
>  .../bindings/gpio/gpio-pca95xx.yaml           | 72 ++++++++++++++++++-
>  2 files changed, 70 insertions(+), 60 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-max732x.txt
> 
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-max732x.txt b/Documentation/devicetree/bindings/gpio/gpio-max732x.txt
> deleted file mode 100644
> index b3a9c0c32823..000000000000
> --- a/Documentation/devicetree/bindings/gpio/gpio-max732x.txt
> +++ /dev/null
> @@ -1,58 +0,0 @@
> -* MAX732x-compatible I/O expanders
> -
> -Required properties:
> -  - compatible: Should be one of the following:
> -    - "maxim,max7319": For the Maxim MAX7319
> -    - "maxim,max7320": For the Maxim MAX7320
> -    - "maxim,max7321": For the Maxim MAX7321
> -    - "maxim,max7322": For the Maxim MAX7322
> -    - "maxim,max7323": For the Maxim MAX7323
> -    - "maxim,max7324": For the Maxim MAX7324
> -    - "maxim,max7325": For the Maxim MAX7325
> -    - "maxim,max7326": For the Maxim MAX7326
> -    - "maxim,max7327": For the Maxim MAX7327
> -  - reg: I2C slave address for this device.
> -  - gpio-controller: Marks the device node as a GPIO controller.
> -  - #gpio-cells: Should be 2.
> -    - first cell is the GPIO number
> -    - second cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
> -      Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
> -
> -Optional properties:
> -
> -  The I/O expander can detect input state changes, and thus optionally act as
> -  an interrupt controller. When the expander interrupt line is connected all the
> -  following properties must be set. For more information please see the
> -  interrupt controller device tree bindings documentation available at
> -  Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
> -
> -  - interrupt-controller: Identifies the node as an interrupt controller.
> -  - #interrupt-cells: Number of cells to encode an interrupt source, shall be 2.
> -    - first cell is the pin number
> -    - second cell is used to specify flags
> -  - interrupts: Interrupt specifier for the controllers interrupt.
> -
> -Please refer to gpio.txt in this directory for details of the common GPIO
> -bindings used by client devices.
> -
> -Example 1. MAX7325 with interrupt support enabled (CONFIG_GPIO_MAX732X_IRQ=y):
> -
> -	expander: max7325 at 6d {
> -		compatible = "maxim,max7325";
> -		reg = <0x6d>;
> -		gpio-controller;
> -		#gpio-cells = <2>;
> -		interrupt-controller;
> -		#interrupt-cells = <2>;
> -		interrupt-parent = <&gpio4>;
> -		interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
> -	};
> -
> -Example 2. MAX7325 with interrupt support disabled (CONFIG_GPIO_MAX732X_IRQ=n):
> -
> -	expander: max7325 at 6d {
> -		compatible = "maxim,max7325";
> -		reg = <0x6d>;
> -		gpio-controller;
> -		#gpio-cells = <2>;
> -	};
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> index c5bb24b3b7b5..e90433b7d52b 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> +++ b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> @@ -9,6 +9,10 @@ title: NXP PCA95xx I2C GPIO multiplexer
>  maintainers:
>    - Krzysztof Kozlowski <krzk@kernel.org>
>  
> +description: |+
> +  Bindings for the family of I2C GPIO multiplexers/expanders: NXP PCA95xx,
> +  Maxim MAX73xx
> +
>  properties:
>    compatible:
>      enum:
> @@ -17,6 +21,15 @@ properties:
>        - maxim,max7312
>        - maxim,max7313
>        - maxim,max7315
> +      - maxim,max7319
> +      - maxim,max7320
> +      - maxim,max7321
> +      - maxim,max7322
> +      - maxim,max7323
> +      - maxim,max7324
> +      - maxim,max7325
> +      - maxim,max7326
> +      - maxim,max7327
>        - nxp,pca6416
>        - nxp,pca9505
>        - nxp,pca9534
> @@ -69,11 +82,11 @@ properties:
>    reset-gpios:
>      description:
>        GPIO specification for the RESET input. This is an active low signal to
> -      the PCA953x.
> +      the PCA953x.  Not valid for Maxim MAX732x devices.
>  
>    vcc-supply:
>      description:
> -      Optional power supply
> +      Optional power supply.  Not valid for Maxim MAX732x devices.
>  
>  required:
>    - compatible
> @@ -83,6 +96,27 @@ required:
>  
>  unevaluatedProperties: false
>  
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - maxim,max7320
> +              - maxim,max7321
> +              - maxim,max7322
> +              - maxim,max7323
> +              - maxim,max7324
> +              - maxim,max7325
> +              - maxim,max7326
> +              - maxim,max7327
> +    then:
> +      properties:
> +        reset-gpios:
> +          maxItems: 0
> +        vcc-supply:
> +          maxItems: 0

reset-gpios: false
vcc-supply: false

> +
>  examples:
>    - |
>      #include <dt-bindings/interrupt-controller/irq.h>
> @@ -136,3 +170,37 @@ examples:
>              ti,micbias = <0>;	/* 2.1V */
>          };
>      };
> +
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c2 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        // MAX7325 with interrupt support enabled
> +        gpio at 6d {
> +            compatible = "maxim,max7325";
> +            reg = <0x6d>;
> +            gpio-controller;
> +            #gpio-cells = <2>;
> +            interrupt-controller;
> +            #interrupt-cells = <2>;
> +            interrupt-parent = <&gpio4>;
> +            interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
> +        };
> +    };
> +
> +  - |
> +    i2c3 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        // MAX7325 with interrupt support disabled
> +        gpio at 6e {
> +            compatible = "maxim,max7325";
> +            reg = <0x6e>;
> +            gpio-controller;
> +            #gpio-cells = <2>;
> +        };
> +    };
> -- 
> 2.17.1
>