[PATCH v4 0/2] STMPE device tree bindings

[PATCH v4 0/2] STMPE device tree bindings

[Linus Walleij]

This adds the missing GPIO bindings for the STMPE port expander
and converts the existing MFD binding to YAML.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Changes in v4:
- Make the GPIO bindings a conversion: there were some old
  text bindings for the STMPE GPIO, we now delete them as
  part of the patch.
- I expect Lee or the DT binding tree to pick both patches.
- Link to v3: https://lore.kernel.org/r/20230426-stmpe-dt-bindings-v3-0-eac1d736e488@linaro.org

Changes in v3:
- Update to review feedback
- Collected some ack/review tags
- Link to v2: https://lore.kernel.org/r/20230426-stmpe-dt-bindings-v2-0-2f85a1fffcda@linaro.org

Changes in v2:
- Split off a separate GPIO binding
- Updated the MFD binding according to feedback

---
Linus Walleij (2):
      dt-bindings: gpio: Convert STMPE GPIO to YAML schema
      dt-bindings: MFD: Convert STMPE to YAML schema

 .../devicetree/bindings/gpio/gpio-stmpe.txt        |  17 --
 .../devicetree/bindings/gpio/st,stmpe-gpio.yaml    |  53 ++++
 .../devicetree/bindings/input/stmpe-keypad.txt     |  41 ---
 .../bindings/input/touchscreen/stmpe.txt           | 108 --------
 .../devicetree/bindings/mfd/st,stmpe.yaml          | 297 +++++++++++++++++++++
 Documentation/devicetree/bindings/mfd/stmpe.txt    |  42 ---
 6 files changed, 350 insertions(+), 208 deletions(-)
---
base-commit: b777e950b1e0b9112418e7669c8b6d96915df778
change-id: 20230426-stmpe-dt-bindings-c3479dd71a28

Best regards,
-- 
Linus Walleij <linus.walleij@linaro.org>

[PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Linus Walleij]

This rewrites the STMPE GPIO bindings to a YAML schema.

We add the properties that are used in the widely used
STMPE GPIO device nodes found in the wild, most notably
interrupt support, so interrupt-cells and
interrupt-controller is now part of the bindings.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v3->v4:
- Realize that there were actually some old bindings so we
  need to get rid of them as part of this patch.
- Fix blank lines after description: keyword.
ChangeLog v2->v3:
- Use a compact hog node schema backed by the standard hog
  schema.
ChangeLog v1->v2:
- New patch split off from the MFD patch.
---
 .../devicetree/bindings/gpio/gpio-stmpe.txt        | 17 -------
 .../devicetree/bindings/gpio/st,stmpe-gpio.yaml    | 53 ++++++++++++++++++++++
 2 files changed, 53 insertions(+), 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt
deleted file mode 100644
index b33f8f02c0d7..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-STMPE gpio
-----------
-
-Required properties:
- - compatible: "st,stmpe-gpio"
-
-Optional properties:
- - st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable
-   due to different usage (e.g. touch, keypad)
-
-Node should be child node of stmpe node to which it belongs.
-
-Example:
-	stmpe_gpio {
-		compatible = "st,stmpe-gpio";
-		st,norequest-mask = <0x20>;	//gpio 5 can't be used
-	};
diff --git a/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
new file mode 100644
index 000000000000..22c0cae73425
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/st,stmpe-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectonics Port Expander (STMPE) GPIO Block
+
+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. These bindings pertain to the
+  GPIO portions of these expanders.
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+properties:
+  compatible:
+    const: st,stmpe-gpio
+
+  "#gpio-cells":
+    const: 2
+
+  "#interrupt-cells":
+    const: 2
+
+  gpio-controller: true
+
+  interrupt-controller: true
+
+  st,norequest-mask:
+    description:
+      A bitmask of GPIO lines that cannot be requested because for
+      for example not being connected to anything on the system
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+patternProperties:
+  "^.+-hog(-[0-9]+)?$":
+    type: object
+
+    required:
+      - gpio-hog
+
+additionalProperties: false
+
+required:
+  - compatible
+  - "#gpio-cells"
+  - "#interrupt-cells"
+  - gpio-controller
+  - interrupt-controller

-- 
2.34.1

Re: [PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Krzysztof Kozlowski]

On 08/05/2023 14:35, Linus Walleij wrote:
> This rewrites the STMPE GPIO bindings to a YAML schema.
> 
> We add the properties that are used in the widely used
> STMPE GPIO device nodes found in the wild, most notably
> interrupt support, so interrupt-cells and
> interrupt-controller is now part of the bindings.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Bartosz Golaszewski]

On Mon, May 8, 2023 at 2:35 PM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> This rewrites the STMPE GPIO bindings to a YAML schema.
>
> We add the properties that are used in the widely used
> STMPE GPIO device nodes found in the wild, most notably
> interrupt support, so interrupt-cells and
> interrupt-controller is now part of the bindings.
>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v3->v4:
> - Realize that there were actually some old bindings so we
>   need to get rid of them as part of this patch.
> - Fix blank lines after description: keyword.
> ChangeLog v2->v3:
> - Use a compact hog node schema backed by the standard hog
>   schema.
> ChangeLog v1->v2:
> - New patch split off from the MFD patch.
> ---
>  .../devicetree/bindings/gpio/gpio-stmpe.txt        | 17 -------
>  .../devicetree/bindings/gpio/st,stmpe-gpio.yaml    | 53 ++++++++++++++++++++++
>  2 files changed, 53 insertions(+), 17 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt
> deleted file mode 100644
> index b33f8f02c0d7..000000000000
> --- a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt
> +++ /dev/null
> @@ -1,17 +0,0 @@
> -STMPE gpio
> -----------
> -
> -Required properties:
> - - compatible: "st,stmpe-gpio"
> -
> -Optional properties:
> - - st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable
> -   due to different usage (e.g. touch, keypad)
> -
> -Node should be child node of stmpe node to which it belongs.
> -
> -Example:
> -       stmpe_gpio {
> -               compatible = "st,stmpe-gpio";
> -               st,norequest-mask = <0x20>;     //gpio 5 can't be used
> -       };
> diff --git a/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
> new file mode 100644
> index 000000000000..22c0cae73425
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/st,stmpe-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: STMicroelectonics Port Expander (STMPE) GPIO Block
> +
> +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. These bindings pertain to the
> +  GPIO portions of these expanders.
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@linaro.org>
> +
> +properties:
> +  compatible:
> +    const: st,stmpe-gpio
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  "#interrupt-cells":
> +    const: 2
> +
> +  gpio-controller: true
> +
> +  interrupt-controller: true
> +
> +  st,norequest-mask:
> +    description:
> +      A bitmask of GPIO lines that cannot be requested because for
> +      for example not being connected to anything on the system
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +patternProperties:
> +  "^.+-hog(-[0-9]+)?$":
> +    type: object
> +
> +    required:
> +      - gpio-hog
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - "#gpio-cells"
> +  - "#interrupt-cells"
> +  - gpio-controller
> +  - interrupt-controller
>
> --
> 2.34.1
>

Applied, thanks!

Bart

Re: [PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Linus Walleij]

On Thu, May 11, 2023 at 4:58 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> Applied, thanks!

That works ... but patch 2/2 depends on this one. (uses $ref).
You'd have to give Lee an immutable branch that he can pull
before applying patch 2/2 so he has the dependency, or let him
apply both.

Yours,
Linus Walleij

Re: [PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Bartosz Golaszewski]

On Thu, May 11, 2023 at 10:39 PM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> On Thu, May 11, 2023 at 4:58 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> > Applied, thanks!
>
> That works ... but patch 2/2 depends on this one. (uses $ref).
> You'd have to give Lee an immutable branch that he can pull
> before applying patch 2/2 so he has the dependency, or let him
> apply both.
>
> Yours,
> Linus Walleij

Sure:

The following changes since commit ac9a78681b921877518763ba0e89202254349d1b:

  Linux 6.4-rc1 (2023-05-07 13:34:35 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
tags/v6.4-stmpe-gpio

for you to fetch changes up to 6c19974d1e83fba2cca1cbea2fbf250f093eb5ed:

  dt-bindings: gpio: Convert STMPE GPIO to YAML schema (2023-05-11
16:58:04 +0200)

Bart

Re: [PATCH v4 1/2] dt-bindings: gpio: Convert STMPE GPIO to YAML schema

[Linus Walleij]

On Tue, May 16, 2023 at 5:34 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> On Thu, May 11, 2023 at 10:39 PM Linus Walleij <linus.walleij@linaro.org> wrote:
> >
> > On Thu, May 11, 2023 at 4:58 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> >
> > > Applied, thanks!
> >
> > That works ... but patch 2/2 depends on this one. (uses $ref).
> > You'd have to give Lee an immutable branch that he can pull
> > before applying patch 2/2 so he has the dependency, or let him
> > apply both.
> >
> > Yours,
> > Linus Walleij
>
> Sure:
>
> The following changes since commit ac9a78681b921877518763ba0e89202254349d1b:
>
>   Linux 6.4-rc1 (2023-05-07 13:34:35 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
> tags/v6.4-stmpe-gpio
>
> for you to fetch changes up to 6c19974d1e83fba2cca1cbea2fbf250f093eb5ed:
>
>   dt-bindings: gpio: Convert STMPE GPIO to YAML schema (2023-05-11
> 16:58:04 +0200)

Hey cool :D

Lee if you pull this in you can apply 2/2 on top if it checks out.

Yours,
Linus Walleij

[PATCH v4 2/2] dt-bindings: MFD: Convert STMPE to YAML schema

[Linus Walleij]

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.

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Drop the required pwm properties already required by the
  template pwm schema.
- Add the number of PWM cells as const.
ChangeLog v1->v2:
- Split off the GPIO bindings to their own schema, as the old
  bindings didn't even have any GPIO bindings. Put the GPIO
  schema before this schema so we can use GPIO in the examples.
- Drop nodename and pattern as STMPE is not a generic name.
- Add maxItems to the resets.
- Make wakeup-source just :true, as it is a generic property.
- Move unevaluatedProperties for subnodes right before properties
  as requested.
- Name devices "port-expander" in the examples.
- Use lowercase hex in line init.
---
 .../devicetree/bindings/input/stmpe-keypad.txt     |  41 ---
 .../bindings/input/touchscreen/stmpe.txt           | 108 --------
 .../devicetree/bindings/mfd/st,stmpe.yaml          | 297 +++++++++++++++++++++
 Documentation/devicetree/bindings/mfd/stmpe.txt    |  42 ---
 4 files changed, 297 insertions(+), 191 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/stmpe-keypad.txt b/Documentation/devicetree/bindings/input/stmpe-keypad.txt
deleted file mode 100644
index 12bb771d66d4..000000000000
--- a/Documentation/devicetree/bindings/input/stmpe-keypad.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-* 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>;
-	};
diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
deleted file mode 100644
index 238b51555c04..000000000000
--- a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
+++ /dev/null
@@ -1,108 +0,0 @@
-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>;
-	};
-};
diff --git a/Documentation/devicetree/bindings/mfd/st,stmpe.yaml b/Documentation/devicetree/bindings/mfd/st,stmpe.yaml
new file mode 100644
index 000000000000..b77cc3f3075d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/st,stmpe.yaml
@@ -0,0 +1,297 @@
+# 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>;
+        };
+      };
+    };
+...
diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
deleted file mode 100644
index d4408a417193..000000000000
--- a/Documentation/devicetree/bindings/mfd/stmpe.txt
+++ /dev/null
@@ -1,42 +0,0 @@
-* 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>;
-	};

-- 
2.34.1

Re: [PATCH v4 2/2] dt-bindings: MFD: Convert STMPE to YAML schema

[Krzysztof Kozlowski]

On Mon, 08 May 2023 14:35:10 +0200, Linus Walleij wrote:
> 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.
> 
> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v2->v3:
> - Drop the required pwm properties already required by the
>   template pwm schema.
> - Add the number of PWM cells as const.
> ChangeLog v1->v2:
> - Split off the GPIO bindings to their own schema, as the old
>   bindings didn't even have any GPIO bindings. Put the GPIO
>   schema before this schema so we can use GPIO in the examples.
> - Drop nodename and pattern as STMPE is not a generic name.
> - Add maxItems to the resets.
> - Make wakeup-source just :true, as it is a generic property.
> - Move unevaluatedProperties for subnodes right before properties
>   as requested.
> - Name devices "port-expander" in the examples.
> - Use lowercase hex in line init.
> ---
>  .../devicetree/bindings/input/stmpe-keypad.txt     |  41 ---
>  .../bindings/input/touchscreen/stmpe.txt           | 108 --------
>  .../devicetree/bindings/mfd/st,stmpe.yaml          | 297 +++++++++++++++++++++
>  Documentation/devicetree/bindings/mfd/stmpe.txt    |  42 ---
>  4 files changed, 297 insertions(+), 191 deletions(-)
> 

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/mfd/st,stmpe.yaml: Unable to find schema file matching $id: http://devicetree.org/schemas/gpio/st,stmpe-gpio.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/st,stmpe.example.dtb: port-expander@43: gpio: False schema does not allow {'compatible': ['st,stmpe-gpio'], 'gpio-controller': True, '#gpio-cells': [[2]], 'interrupt-controller': True, '#interrupt-cells': [[2]], 'st,norequest-mask': [[15790082]]}
	From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/st,stmpe.yaml
Documentation/devicetree/bindings/mfd/st,stmpe.example.dtb: /example-0/i2c/port-expander@43/gpio: failed to match any schema with compatible: ['st,stmpe-gpio']
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/st,stmpe.example.dtb: port-expander@41: gpio: False schema does not allow {'compatible': ['st,stmpe-gpio'], 'gpio-controller': True, '#gpio-cells': [[2]], 'interrupt-controller': True, '#interrupt-cells': [[2]]}
	From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/mfd/st,stmpe.yaml
Documentation/devicetree/bindings/mfd/st,stmpe.example.dtb: /example-0/i2c/port-expander@41/gpio: failed to match any schema with compatible: ['st,stmpe-gpio']

doc reference errors (make refcheckdocs):
Documentation/usb/gadget_uvc.rst: Documentation/userspace-api/media/v4l/pixfmt-packed.yuv.rst
MAINTAINERS: Documentation/devicetree/bindings/pwm/pwm-apple.yaml

See https://patchwork.ozlabs.org/patch/1778351

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.