On Fri, Mar 22, 2024 at 04:56:03PM +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@xxxxxxxxxxx> note to self/Krzysztof/Rob: There was a previous attempt at this kind of device. This version looks better but might be incomplete given there's a bunch more properties in that patchset: https://lore.kernel.org/all/20231017091900.801989-1-tylor_yang@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > --- > .../input/touchscreen/himax,hx83102j.yaml | 73 +++++++++++++++++++ > MAINTAINERS | 6 ++ > 2 files changed, 79 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..6c0a1ebf8d91 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml > @@ -0,0 +1,73 @@ > +# 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@xxxxxxxxxxx> > + > +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 > + > + spi-cpha: true > + > + spi-cpol: true > + > + spi-max-frequency: true > + > + panel: true > + > + himax,pid: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + PID for HID device, used to load correct firmware. One thing I did comment on that old patchset is why you cannot just use firmware-name here? Cheers, Conor. > + > +required: > + - compatible > + - reg > + - interrupts > + - reset-gpios > + - panel > + > +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>; > + }; > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index 43b39956694a..aa51c60fd66d 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -9669,6 +9669,12 @@ L: linux-kernel@xxxxxxxxxxxxxxx > S: Maintained > F: drivers/misc/hisi_hikey_usb.c > > +HIMAX HID HX83102J TOUCHSCREEN > +M: Allen Lin <allencl_lin@xxxxxxxxxxx> > +L: linux-input@xxxxxxxxxxxxxxx > +S: Maintained > +F: Documentation/devicetree/bindings/input/touchscreen/himax,hx83102j.yaml > + > HIMAX HX83112B TOUCHSCREEN SUPPORT > M: Job Noorman <job@xxxxxxxxxxxx> > L: linux-input@xxxxxxxxxxxxxxx > -- > 2.34.1 >
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