Commit d7f4a65c authored by Piyush Mehta's avatar Piyush Mehta Committed by Bartosz Golaszewski
Browse files

dt-bindings: gpio: zynqmp: Add binding documentation for modepin 

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: default avatarPiyush Mehta <piyush.mehta@xilinx.com>
Acked-by: default avatarMichal Simek <michal.simek@xilinx.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
parent 23c64d76

Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml

0 → 100644
+43 −0
Original line number Diff line number Diff line 
# 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@xilinx.com>



properties:

  compatible:

    const: xlnx,zynqmp-gpio-modepin



  gpio-controller: true



  "#gpio-cells":

    const: 2



required:

  - compatible

  - gpio-controller

  - "#gpio-cells"



additionalProperties: false



examples:

  - |

    zynqmp-firmware {

        gpio {

            compatible = "xlnx,zynqmp-gpio-modepin";

            gpio-controller;

            #gpio-cells = <2>;

        };

    };



...