On Thu, Aug 05, 2021 at 11:12:18PM +0530, Piyush Mehta wrote: > This patch adds DT binding document for zynqmp modepin GPIO controller. > Modepin GPIO controller has four GPIO pins which can be configurable > as input or output. > > Modepin driver is a bridge between the peripheral driver and GPIO pins. > It has set and get APIs for accessing GPIO pins, based on the device-tree > entry of reset-gpio property in the peripheral driver, every pin can be > configured as input/output and trigger GPIO pin. > > For more information please refer zynqMp TRM link: > Link: https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf > Chapter 2: Signals, Interfaces, and Pins > Table 2-2: Clock, Reset, and Configuration Pins - PS_MODE > > Signed-off-by: Piyush Mehta <piyush.mehta@xxxxxxxxxx> > --- > Changes in v2: > - Addressed review comments: Update commit message > > https://lore.kernel.org/linux-arm-kernel/20210615080553.2021061-2-piyush.mehta@xxxxxxxxxx/T/#mbd1fbda813e33b19397b350bde75747c92a0d7e1 > https://lore.kernel.org/linux-arm-kernel/20210615080553.2021061-2-piyush.mehta@xxxxxxxxxx/T/#me82b1444ab3776162cdb0077dfc9256365c7e736 > --- > .../bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml | 41 ++++++++++++++++++++++ > 1 file changed, 41 insertions(+) > create mode 100644 Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml > > diff --git a/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml b/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml > new file mode 100644 > index 0000000..39d78f8 > --- /dev/null > +++ b/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml > @@ -0,0 +1,41 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: "http://devicetree.org/schemas/gpio/xlnx,zynqmp-gpio-modepin.yaml#"; > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"; > + > +title: ZynqMP Mode Pin GPIO controller > + > +description: > + PS_MODE is 4-bits boot mode pins sampled on POR deassertion. Mode Pin > + GPIO controller with configurable from numbers of pins (from 0 to 3 per > + PS_MODE). Every pin can be configured as input/output. > + > +maintainers: > + - Piyush Mehta <piyush.mehta@xxxxxxxxxx> > + > +properties: > + compatible: > + const: xlnx,zynqmp-gpio-modepin > + > + gpio-controller: true > + > + "#gpio-cells": > + const: 2 > + > +required: > + - compatible > + - gpio-controller > + - "#gpio-cells" > + > +additionalProperties: false > + > +examples: > + - | > + modepin_gpio: gpio { > + compatible = "xlnx,zynqmp-gpio-modepin"; > + gpio-controller; > + #gpio-cells = <2>; No way to interact with this h/w? As it is part of the firmware interface, it must be a child node in the firmware node schema. > + }; > + > +... > -- > 2.7.4 > >
