linux-kernel - Re: [PATCH v2 1/4] dt-bindings: input: Add Himax HX83102J touchscreen

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Message-ID:
 <TY0PR06MB561132CACFD67235EFC76C219E3D2@TY0PR06MB5611.apcprd06.prod.outlook.com>
Date: Wed, 3 Apr 2024 14:53:08 +0800
From: Allen Lin <allencl_lin@...mail.com>
To: Conor Dooley <conor@...nel.org>
Cc: dmitry.torokhov@...il.com, robh@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, jikos@...nel.org, 
	benjamin.tissoires@...hat.com, linux-input@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: input: Add Himax HX83102J touchscreen

Conor Dooley <conor@...nel.org> 於 2024年4月3日 週三 上午2:09寫道：
>
> On Tue, Apr 02, 2024 at 06:49:27PM +0800, Allen_Lin wrote:
> > Add the HX83102j touchscreen device tree bindings documents.
> > HX83102j is a Himax TDDI touchscreen controller.
> > It's power sequence should be bound with a lcm driver, thus it
> > needs to be a panel follower. Others are the same as normal SPI
> > touchscreen controller.
> >
> > Signed-off-by: Allen_Lin <allencl_lin@...mail.com>
> > ---
> >  .../input/touchscreen/himax,hx83102j.yaml     | 100 ++++++++++++++++++
> >  MAINTAINERS                                   |   6 ++
> >  2 files changed, 106 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml b/Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml
> > new file mode 100644
> > index 000000000000..fe79129f704a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml
> > @@ -0,0 +1,100 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/input/touchscreen/himax,hx83102j.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Himax hx83102j touchscreen
> > +
> > +maintainers:
> > +  - Allen Lin <allencl_lin@...mail.com>
> > +
> > +description:
> > +  This Himax hx83102j touchscreen uses the spi protocol.
> > +
> > +allOf:
> > +  - $ref: /schemas/input/touchscreen/touchscreen.yaml#
> > +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: himax,hx83102j
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  reset-gpios:
> > +    maxItems: 1
> > +
> > +  vccd-supply:
> > +    description: A phandle for the regualtor supplying IO power.
>
> nit: regulator
>
> > +
> > +  vsn-supply:
> > +    description: Negative supply regulator.
> > +
> > +  vsp-supply:
> > +    description: Positive supply regulator.
>
> Cool, thanks for adding these.
>
> > +
> > +  ddreset-gpios:
> > +    description: A phandle of gpio for display reset controlled by the LCD driver.
> > +      This is the master reset, if this reset is triggered, the TP reset will
> > +      also be triggered.
> > +
> > +  spi-cpha: true
> > +
> > +  spi-cpol: true
> > +
> > +  spi-max-frequency: true
> > +
> > +  panel: true
> > +
> > +  himax,firmware-name:
>
> firmware-name is a standard property, you don't need to vendor prefix it.
>
> > +    $ref: /schemas/types.yaml#/definitions/string
> > +    description:
> > +      Specify the file name for firmware loading.
> > +
> > +  himax,pid:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description:
> > +      PID for HID device, used to validate firmware.
>
> Why do you need this _and_ firmware-name? You should be able to trust
> the firmware that the dt has told you to use, no?
>
> Cheers,
> Conor.

OK, I should trust the dt document and fix these issues in next patch
1. fix "regulator" spelling
2. himax,firmware-name ->firmware-name
3. remove himax,pid

Thanks
Allen

>
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - reset-gpios
> > +  - panel
> > +  - vccd-supply
> > +  - vsn-supply
> > +  - vsp-supply
> > +  - ddreset-gpios
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    spi {
> > +      #address-cells = <1>;
> > +      #size-cells = <0>;
> > +      ap_ts: touchscreen@0 {
> > +        compatible = "himax,hx83102j";
> > +        reg = <0>;
> > +        pinctrl-names = "default";
> > +        pinctrl-0 = <&touch_int0 &touch_reset>;
> > +        reset-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
> > +        spi-cpha;
> > +        spi-cpol;
> > +        interrupt-parent = <&gpio1>;
> > +        interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
> > +        panel = <&panel>;
> > +        vccd-supply = <&regulator>;
> > +        vsn-supply = <&regulator>;
> > +        vsp-supply = <&regulator>;
> > +        ddreset-gpios = <&gpio1>;
> > +      };
> > +    };
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 43b39956694a..aa51c60fd66d 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -9669,6 +9669,12 @@ L:     linux-kernel@...r.kernel.org
> >  S:   Maintained
> >  F:   drivers/misc/hisi_hikey_usb.c
> >
> > +HIMAX HID HX83102J TOUCHSCREEN
> > +M:   Allen Lin <allencl_lin@...mail.com>
> > +L:   linux-input@...r.kernel.org
> > +S:   Maintained
> > +F:   Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml
> > +
> >  HIMAX HX83112B TOUCHSCREEN SUPPORT
> >  M:   Job Noorman <job@...rman.info>
> >  L:   linux-input@...r.kernel.org
> > --
> > 2.34.1
> >