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Altera FPGAs in passive serial mode
===================================
This binding defines the control interface to Altera FPGAs in
passive serial mode. This is used to upload the firmware and
to start the FPGA.
Required properties:
- ``compatible``: shall be ``"altr,fpga-passive-serial"`` or
``"altr,fpga-arria10-passive-serial"`` for Arria 10
- ``reg``: SPI chip select
- ``nstat-gpios``: Specify GPIO for controlling the nstat pin
- ``confd-gpios``: Specify GPIO for controlling the confd pin
- ``nconfig-gpios``: Specify GPIO for controlling the nconfig pin
Example:
.. code-block:: none
fpga@0 {
compatible = "altr,fpga-passive-serial";
nstat-gpios = <&gpio4 18 0>;
confd-gpios = <&gpio4 19 0>;
nconfig-gpios = <&gpio4 20 0>;
spi-max-frequency = <10000000>;
reg = <0>;
};
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