.../bindings/input/goodix,gt7986u.yaml | 66 +++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
The Goodix GT7986U touch controller report touch data according to the
HID protocol through the SPI bus. However, it is incompatible with
Microsoft's HID-over-SPI protocol.
Signed-off-by: Charles Wang <charles.goodix@gmail.com>
---
Changes in v2:
- Change compatible to 'goodix,gt7986u-spifw'.
- Remove 'goodix,hid-report-addr' property.
- Change additionalProperties to unevaluatedProperties.
- v1: https://lore.kernel.org/all/20241025114642.40793-2-charles.goodix@gmail.com/
---
.../bindings/input/goodix,gt7986u.yaml | 66 +++++++++++++++++++
1 file changed, 66 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
new file mode 100644
index 000000000..b7afa21fb
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/goodix,gt7986u.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Goodix GT7986U SPI HID Touchscreen
+
+maintainers:
+ - Charles Wang <charles.goodix@gmail.com>
+
+description: Supports the Goodix GT7986U touchscreen.
+ This touch controller reports data packaged according to the HID protocol
+ over the SPI bus, but it is incompatible with Microsoft's HID-over-SPI protocol.
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+ compatible:
+ description:
+ Add the 'spifw' suffix to distinguish it from the general GT7986U I2C-HID
+ touchscreen, as it runs a substantially different firmware than GT7986U
+ I2C-HID touchscreens.
+ enum:
+ - goodix,gt7986u-spifw
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+
+ spi-max-frequency: true
+
+unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - reset-gpios
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ touchscreen@0 {
+ compatible = "goodix,gt7986u-spifw";
+ reg = <0>;
+ interrupt-parent = <&gpio>;
+ interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
+ reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+ spi-max-frequency = <10000000>;
+ };
+ };
+
+...
--
2.43.0Hi, On Wed, Nov 6, 2024 at 7:23 PM Charles Wang <charles.goodix@gmail.com> wrote: > > The Goodix GT7986U touch controller report touch data according to the > HID protocol through the SPI bus. However, it is incompatible with > Microsoft's HID-over-SPI protocol. I think it was requested that both the yaml file and the commit message mention why there are two different yaml file that both talk about "gt7986u". In the commit message I think it would be valuable to point to the previous discussion. AKA, maybe say: NOTE: these bindings are distinct from the bindings used with the GT7986U when the chip is running I2C firmware. For some background, see discussion on the mailing lists in the thread: https://lore.kernel.org/r/20241018020815.3098263-2-charles.goodix@gmail.com > Signed-off-by: Charles Wang <charles.goodix@gmail.com> > --- > Changes in v2: > - Change compatible to 'goodix,gt7986u-spifw'. > - Remove 'goodix,hid-report-addr' property. Probably this should be a two-patch series now. The first is this bindings file and the second changes the firmware (which never got reverted) to default to a hid-report-addr of 1. > - Change additionalProperties to unevaluatedProperties. > - v1: https://lore.kernel.org/all/20241025114642.40793-2-charles.goodix@gmail.com/ > --- > .../bindings/input/goodix,gt7986u.yaml | 66 +++++++++++++++++++ > 1 file changed, 66 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u.yaml The name of the file needs to match the primary compatible, so it should include the "-spifw" part. > diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml > new file mode 100644 > index 000000000..b7afa21fb > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml > @@ -0,0 +1,66 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/input/goodix,gt7986u.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Goodix GT7986U SPI HID Touchscreen > + > +maintainers: > + - Charles Wang <charles.goodix@gmail.com> > + > +description: Supports the Goodix GT7986U touchscreen. > + This touch controller reports data packaged according to the HID protocol > + over the SPI bus, but it is incompatible with Microsoft's HID-over-SPI protocol. I probably would have put the note about the compatible here instead of below. Something like: NOTE: these bindings are distinct from the bindings used with the GT7986U when the chip is running I2C firmware. This is because there's not a single device that talks over both I2C and SPI but rather distinct touchscreens that happen to be built with the same ASIC but that are distinct products running distinct firmware. > +allOf: > + - $ref: /schemas/spi/spi-peripheral-props.yaml# > + > +properties: > + compatible: > + description: > + Add the 'spifw' suffix to distinguish it from the general GT7986U I2C-HID > + touchscreen, as it runs a substantially different firmware than GT7986U > + I2C-HID touchscreens. As per above, I'd remove the "description" here. It's not common for a compatible to have a "description". > + enum: > + - goodix,gt7986u-spifw > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + reset-gpios: > + maxItems: 1 > + > + spi-max-frequency: true > + > +unevaluatedProperties: false I believe "unevaluatedProperties" is supposed to be moved down below "required" according to previous comments on your patches.
On Thu, Nov 07, 2024 at 01:54:33PM -0800, Doug Anderson wrote: > Hi, > > On Wed, Nov 6, 2024 at 7:23 PM Charles Wang <charles.goodix@gmail.com> wrote: > > > > The Goodix GT7986U touch controller report touch data according to the > > HID protocol through the SPI bus. However, it is incompatible with > > Microsoft's HID-over-SPI protocol. > > I think it was requested that both the yaml file and the commit > message mention why there are two different yaml file that both talk > about "gt7986u". In the commit message I think it would be valuable to > point to the previous discussion. AKA, maybe say: > > NOTE: these bindings are distinct from the bindings used with the > GT7986U when the chip is running I2C firmware. For some background, > see discussion on the mailing lists in the thread: > > https://lore.kernel.org/r/20241018020815.3098263-2-charles.goodix@gmail.com > Ack, > > > Signed-off-by: Charles Wang <charles.goodix@gmail.com> > > --- > > Changes in v2: > > - Change compatible to 'goodix,gt7986u-spifw'. > > - Remove 'goodix,hid-report-addr' property. > > Probably this should be a two-patch series now. The first is this > bindings file and the second changes the firmware (which never got > reverted) to default to a hid-report-addr of 1. > Ack, > > > - Change additionalProperties to unevaluatedProperties. > > - v1: https://lore.kernel.org/all/20241025114642.40793-2-charles.goodix@gmail.com/ > > --- > > .../bindings/input/goodix,gt7986u.yaml | 66 +++++++++++++++++++ > > 1 file changed, 66 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u.yaml > > The name of the file needs to match the primary compatible, so it > should include the "-spifw" part. > Ack, > > > diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml > > new file mode 100644 > > index 000000000..b7afa21fb > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml > > @@ -0,0 +1,66 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/input/goodix,gt7986u.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Goodix GT7986U SPI HID Touchscreen > > + > > +maintainers: > > + - Charles Wang <charles.goodix@gmail.com> > > + > > +description: Supports the Goodix GT7986U touchscreen. > > + This touch controller reports data packaged according to the HID protocol > > + over the SPI bus, but it is incompatible with Microsoft's HID-over-SPI protocol. > > I probably would have put the note about the compatible here instead > of below. Something like: > > NOTE: these bindings are distinct from the bindings used with the > GT7986U when the chip is running I2C firmware. This is because there's > not a single device that talks over both I2C and SPI but rather > distinct touchscreens that happen to be built with the same ASIC but > that are distinct products running distinct firmware. > Ack, > > > +allOf: > > + - $ref: /schemas/spi/spi-peripheral-props.yaml# > > + > > +properties: > > + compatible: > > + description: > > + Add the 'spifw' suffix to distinguish it from the general GT7986U I2C-HID > > + touchscreen, as it runs a substantially different firmware than GT7986U > > + I2C-HID touchscreens. > > As per above, I'd remove the "description" here. It's not common for a > compatible to have a "description". > Ack, > > > + enum: > > + - goodix,gt7986u-spifw > > + > > + reg: > > + maxItems: 1 > > + > > + interrupts: > > + maxItems: 1 > > + > > + reset-gpios: > > + maxItems: 1 > > + > > + spi-max-frequency: true > > + > > +unevaluatedProperties: false > > I believe "unevaluatedProperties" is supposed to be moved down below > "required" according to previous comments on your patches. Ack, Thank you very much, Charles
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