dt-bindings: mfd: Convert STMPE to YAML schema

This converts the STMPE MFD device tree bindings to the YAML
schema.

Reference the existing schema for the ADC, just define the
other subnode schemas directly in the MFD schema.

Add two examples so we have examples covering both the simple
GPIO expander and the more complex with ADC and touchscreen.

Some in-tree users do not follow the naming conventions for nodes
so these DTS files need to be augmented to use proper node names
like "adc", "pwm", "gpio", "keyboard-controller" etc before the
bindings take effect on them.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230709-stmpe-dt-bindings-v5-1-34a3d6ee1e57@linaro.orgSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/input/stmpe-keypad.txt

-* STMPE Keypad
-
-Required properties:
- - compatible               : "st,stmpe-keypad"
- - linux,keymap             : See ./matrix-keymap.txt
-
-Optional properties:
- - debounce-interval        : Debouncing interval time in milliseconds
- - st,scan-count            : Scanning cycles elapsed before key data is updated
- - st,no-autorepeat         : If specified device will not autorepeat
- - keypad,num-rows          : See ./matrix-keymap.txt
- - keypad,num-columns       : See ./matrix-keymap.txt
-
-Example:
-
-	stmpe_keypad {
-		compatible = "st,stmpe-keypad";
-
-		debounce-interval = <64>;
-		st,scan-count = <8>;
-		st,no-autorepeat;
-
-		linux,keymap = <0x205006b
-				0x4010074
-				0x3050072
-				0x1030004
-				0x502006a
-				0x500000a
-				0x5008b
-				0x706001c
-				0x405000b
-				0x6070003
-				0x3040067
-				0x303006c
-				0x60400e7
-				0x602009e
-				0x4020073
-				0x5050002
-				0x4030069
-				0x3020008>;
-	};

Documentation/devicetree/bindings/input/touchscreen/stmpe.txt

-STMPE Touchscreen
-----------------
-
-Required properties:
- - compatible: "st,stmpe-ts"
-
-Optional properties:
-- st,ave-ctrl		: Sample average control
-				0 -> 1 sample
-				1 -> 2 samples
-				2 -> 4 samples
-				3 -> 8 samples
-- st,touch-det-delay	: Touch detect interrupt delay (recommended is 3)
-				0 -> 10 us
-				1 -> 50 us
-				2 -> 100 us
-				3 -> 500 us
-				4 -> 1 ms
-				5 -> 5 ms
-				6 -> 10 ms
-				7 -> 50 ms
-- st,settling		: Panel driver settling time (recommended is 2)
-				0 -> 10 us
-				1 -> 100 us
-				2 -> 500 us
-				3 -> 1 ms
-				4 -> 5 ms
-				5 -> 10 ms
-				6 -> 50 ms
-				7 -> 100 ms
-- st,fraction-z		: Length of the fractional part in z (recommended is 7)
-			  (fraction-z ([0..7]) = Count of the fractional part)
-- st,i-drive		: current limit value of the touchscreen drivers
-				0 -> 20 mA (typical 35mA max)
-				1 -> 50 mA (typical 80 mA max)
-
-Optional properties common with MFD (deprecated):
- - st,sample-time	: ADC conversion time in number of clock.
-				0 -> 36 clocks
-				1 -> 44 clocks
-				2 -> 56 clocks
-				3 -> 64 clocks
-				4 -> 80 clocks (recommended)
-				5 -> 96 clocks
-				6 -> 124 clocks
- - st,mod-12b		: ADC Bit mode
-				0 -> 10bit ADC
-				1 -> 12bit ADC
- - st,ref-sel		: ADC reference source
-				0 -> internal
-				1 -> external
- - st,adc-freq		: ADC Clock speed
-				0 -> 1.625 MHz
-				1 -> 3.25 MHz
-				2 || 3 -> 6.5 MHz
-
-Node should be child node of stmpe node to which it belongs.
-
-Note that common ADC settings of stmpe_touchscreen (child) will take precedence
-over the settings done in MFD.
-
-Example:
-
-stmpe811@41 {
-	compatible = "st,stmpe811";
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_touch_int>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-	reg = <0x41>;
-	interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
-	interrupt-parent = <&gpio4>;
-	interrupt-controller;
-	id = <0>;
-	blocks = <0x5>;
-	irq-trigger = <0x1>;
-	/* Common ADC settings */
-	/* 3.25 MHz ADC clock speed */
-	st,adc-freq = <1>;
-	/* 12-bit ADC */
-	st,mod-12b = <1>;
-	/* internal ADC reference */
-	st,ref-sel = <0>;
-	/* ADC converstion time: 80 clocks */
-	st,sample-time = <4>;
-
-	stmpe_touchscreen {
-		compatible = "st,stmpe-ts";
-		reg = <0>;
-		/* 8 sample average control */
-		st,ave-ctrl = <3>;
-		/* 5 ms touch detect interrupt delay */
-		st,touch-det-delay = <5>;
-		/* 1 ms panel driver settling time */
-		st,settling = <3>;
-		/* 7 length fractional part in z */
-		st,fraction-z = <7>;
-		/*
-		 * 50 mA typical 80 mA max touchscreen drivers
-		 * current limit value
-		 */
-		st,i-drive = <1>;
-	};
-	stmpe_adc {
-		compatible = "st,stmpe-adc";
-		st,norequest-mask = <0x0F>;
-	};
-};

Documentation/devicetree/bindings/mfd/st,stmpe.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/st,stmpe.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectonics Port Expander (STMPE)
+
+description: STMicroelectronics Port Expander (STMPE) is a series of slow
+  bus controllers for various expanded peripherals such as GPIO, keypad,
+  touchscreen, ADC, PWM or rotator. It can contain one or several different
+  peripherals connected to SPI or I2C.
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - st,stmpe601
+      - st,stmpe801
+      - st,stmpe811
+      - st,stmpe1600
+      - st,stmpe1601
+      - st,stmpe2401
+      - st,stmpe2403
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vcc-supply: true
+
+  vio-supply: true
+
+  reset-gpios:
+    maxItems: 1
+
+  wakeup-source: true
+
+  st,autosleep-timeout:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 4, 16, 32, 64, 128, 256, 512, 1024 ]
+    description: Time idle before going to automatic sleep to save power
+
+  st,sample-time:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3, 4, 5, 6 ]
+    description: |
+      Sample time per iteration
+      0 = 36 clock ticks
+      1 = 44 clock ticks
+      2 = 56 clock ticks
+      3 = 64 clock ticks
+      4 = 80 clock ticks - recommended
+      5 = 96 clock ticks
+      6 = 124 clock ticks
+
+  st,mod-12b:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    description: ADC bit mode 0 = 10bit ADC, 1 = 12bit ADC
+
+  st,ref-sel:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    description: ADC reference source 0 = internal, 1 = external
+
+  st,adc-freq:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+    description: |
+      ADC clock speed
+      0 = 1.625 MHz
+      1 = 3.25 MHz
+      2, 3 = 6.5 MHz
+
+  adc:
+    type: object
+    $ref: /schemas/iio/adc/st,stmpe-adc.yaml#
+
+  gpio:
+    type: object
+    $ref: /schemas/gpio/st,stmpe-gpio.yaml#
+
+  keyboard-controller:
+    type: object
+    $ref: /schemas/input/matrix-keymap.yaml#
+
+    unevaluatedProperties: false
+
+    properties:
+      compatible:
+        const: st,stmpe-keypad
+
+      debounce-interval:
+        description: Debouncing interval in milliseconds
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+      st,no-autorepeat:
+        description: If present, the keys will not autorepeat when pressed
+        $ref: /schemas/types.yaml#/definitions/flag
+
+      st,scan-count:
+        description: Scanning cycles elapsed before key data is updated
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+    required:
+      - compatible
+      - linux,keymap
+
+  pwm:
+    type: object
+    $ref: /schemas/pwm/pwm.yaml#
+
+    unevaluatedProperties: false
+
+    properties:
+      compatible:
+        const: st,stmpe-pwm
+
+      "#pwm-cells":
+        const: 2
+
+  touchscreen:
+    type: object
+    $ref: /schemas/input/touchscreen/touchscreen.yaml#
+
+    unevaluatedProperties: false
+
+    properties:
+      compatible:
+        const: st,stmpe-ts
+
+      st,ave-ctrl:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [ 0, 1, 2, 3 ]
+        description: |
+          Sample average control
+          0 = 1 sample
+          1 = 2 samples
+          2 = 4 samples
+          3 = 8 samples
+
+      st,touch-det-delay:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
+        description: |
+          Touch detection delay
+          0 = 10 us
+          1 = 50 us
+          2 = 100 us
+          3 = 500 us - recommended
+          4 = 1 ms
+          5 = 5 ms
+          6 = 10 ms
+          7 = 50 ms
+
+      st,settling:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
+        description: |
+          Panel driver settling time
+          0 = 10 us
+          1 = 100 us
+          2 = 500 us - recommended
+          3 = 1 ms
+          4 = 5 ms
+          5 = 10 ms
+          6 = 50 ms
+          7 = 100 ms
+
+      st,fraction-z:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
+        description: Length of the fractional part in z, recommended is 7
+          (fraction-z ([0..7]) = Count of the fractional part)
+
+      st,i-drive:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [ 0, 1 ]
+        description: |
+          current limit value of the touchscreen drivers
+          0 = 20 mA (typical 35 mA max)
+          1 = 50 mA (typical 80 mA max)
+
+    required:
+      - compatible
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/input/input.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      port-expander@43 {
+        compatible = "st,stmpe2401";
+        reg = <0x43>;
+        reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+        interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+        interrupt-parent = <&gpio>;
+        vcc-supply = <&db8500_vsmps2_reg>;
+        vio-supply = <&db8500_vsmps2_reg>;
+        wakeup-source;
+        st,autosleep-timeout = <1024>;
+
+        gpio {
+          compatible = "st,stmpe-gpio";
+          gpio-controller;
+          #gpio-cells = <2>;
+          interrupt-controller;
+          #interrupt-cells = <2>;
+          st,norequest-mask = <0xf0f002>;
+        };
+
+        keyboard-controller {
+          compatible = "st,stmpe-keypad";
+          debounce-interval = <64>;
+          st,scan-count = <8>;
+          st,no-autorepeat;
+          keypad,num-rows = <8>;
+          keypad,num-columns = <8>;
+          linux,keymap = <
+              MATRIX_KEY(0x00, 0x00, KEY_1)
+              MATRIX_KEY(0x00, 0x01, KEY_2)
+              MATRIX_KEY(0x00, 0x02, KEY_3)
+              MATRIX_KEY(0x00, 0x03, KEY_4)
+              MATRIX_KEY(0x00, 0x04, KEY_5)
+              MATRIX_KEY(0x00, 0x05, KEY_6)
+              MATRIX_KEY(0x00, 0x06, KEY_7)
+              MATRIX_KEY(0x00, 0x07, KEY_8)
+              MATRIX_KEY(0x00, 0x08, KEY_9)
+              MATRIX_KEY(0x00, 0x09, KEY_0)
+          >;
+        };
+
+        pwm {
+          compatible = "st,stmpe-pwm";
+          #pwm-cells = <2>;
+        };
+      };
+
+      port-expander@41 {
+        compatible = "st,stmpe811";
+        reg = <0x41>;
+        interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
+        interrupt-parent = <&gpio>;
+        st,adc-freq = <1>;
+        st,mod-12b = <1>;
+        st,ref-sel = <0>;
+        st,sample-time = <4>;
+
+        adc {
+          compatible = "st,stmpe-adc";
+          st,norequest-mask = <0x0f>;
+          #io-channel-cells = <1>;
+        };
+
+        gpio {
+          compatible = "st,stmpe-gpio";
+          gpio-controller;
+          #gpio-cells = <2>;
+          interrupt-controller;
+          #interrupt-cells = <2>;
+        };
+
+        pwm {
+          compatible = "st,stmpe-pwm";
+          #pwm-cells = <2>;
+        };
+
+        touchscreen {
+          compatible = "st,stmpe-ts";
+          st,ave-ctrl = <3>;
+          st,touch-det-delay = <5>;
+          st,settling = <3>;
+          st,fraction-z = <7>;
+          st,i-drive = <1>;
+        };
+      };
+    };
+...

Documentation/devicetree/bindings/mfd/stmpe.txt

-* ST Microelectronics STMPE Multi-Functional Device
-
-STMPE is an MFD device which may expose the following inbuilt devices: gpio,
-keypad, touchscreen, adc, pwm, rotator.
-
-Required properties:
- - compatible			: "st,stmpe[610|801|811|1600|1601|2401|2403]"
- - reg				: I2C/SPI address of the device
-
-Optional properties:
- - interrupts			: The interrupt outputs from the controller
- - interrupt-controller		: Marks the device node as an interrupt controller
- - wakeup-source		: Marks the input device as wakable
- - st,autosleep-timeout		: Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024
- - irq-gpio			: If present, which GPIO to use for event IRQ
-
-Optional properties for devices with touch and ADC (STMPE811|STMPE610):
- - st,sample-time		: ADC conversion time in number of clock.
-					0 -> 36 clocks		4 -> 80 clocks (recommended)
-					1 -> 44 clocks		5 -> 96 clocks
-					2 -> 56 clocks		6 -> 124 clocks
-					3 -> 64 clocks
- - st,mod-12b			: ADC Bit mode
-					0 -> 10bit ADC		1 -> 12bit ADC
- - st,ref-sel			: ADC reference source
-					0 -> internal		1 -> external
- - st,adc-freq			: ADC Clock speed
-					0 -> 1.625 MHz		2 || 3 -> 6.5 MHz
-					1 -> 3.25 MHz
-
-Example:
-
-	stmpe1601: stmpe1601@40 {
-		compatible = "st,stmpe1601";
-		reg = <0x40>;
-		interrupts = <26 0x4>;
-		interrupt-parent = <&gpio6>;
-		interrupt-controller;
-
-		wakeup-source;
-		st,autosleep-timeout = <1024>;
-	};